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Annotation of src/lib/libedit/readline.c, Revision 1.123

1.123   ! christos    1: /*     $NetBSD: readline.c,v 1.120 2016/02/15 23:36:30 christos Exp $  */
1.1       christos    2:
                      3: /*-
                      4:  * Copyright (c) 1997 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to The NetBSD Foundation
                      8:  * by Jaromir Dolecek.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     20:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     21:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     22:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     23:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     24:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     25:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     26:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     27:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     28:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     29:  * POSSIBILITY OF SUCH DAMAGE.
                     30:  */
                     31:
1.20      christos   32: #include "config.h"
1.1       christos   33: #if !defined(lint) && !defined(SCCSID)
1.123   ! christos   34: __RCSID("$NetBSD: readline.c,v 1.120 2016/02/15 23:36:30 christos Exp $");
1.1       christos   35: #endif /* not lint && not SCCSID */
                     36:
                     37: #include <sys/types.h>
                     38: #include <sys/stat.h>
                     39: #include <stdio.h>
1.119     christos   40: #include <stdint.h>
1.1       christos   41: #include <dirent.h>
                     42: #include <string.h>
                     43: #include <pwd.h>
                     44: #include <ctype.h>
                     45: #include <stdlib.h>
                     46: #include <unistd.h>
                     47: #include <limits.h>
1.38      christos   48: #include <errno.h>
                     49: #include <fcntl.h>
1.70      christos   50: #include <setjmp.h>
1.35      christos   51: #include <vis.h>
1.97      christos   52:
1.79      sketch     53: #include "readline/readline.h"
1.45      christos   54: #include "el.h"
                     55: #include "fcns.h"              /* for EL_NUM_FCNS */
1.53      dsl        56: #include "filecomplete.h"
1.1       christos   57:
1.68      christos   58: void rl_prep_terminal(int);
                     59: void rl_deprep_terminal(void);
                     60:
1.1       christos   61: /* for rl_complete() */
1.40      christos   62: #define TAB            '\r'
1.1       christos   63:
                     64: /* see comment at the #ifdef for sense of this */
1.40      christos   65: /* #define GDB_411_HACK */
1.1       christos   66:
                     67: /* readline compatibility stuff - look at readline sources/documentation */
                     68: /* to see what these variables mean */
1.11      lukem      69: const char *rl_library_version = "EditLine wrapper";
1.85      christos   70: int rl_readline_version = RL_READLINE_VERSION;
1.20      christos   71: static char empty[] = { '\0' };
                     72: static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
                     73: static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
                     74:     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
                     75: char *rl_readline_name = empty;
1.11      lukem      76: FILE *rl_instream = NULL;
                     77: FILE *rl_outstream = NULL;
                     78: int rl_point = 0;
                     79: int rl_end = 0;
                     80: char *rl_line_buffer = NULL;
1.117     christos   81: rl_vcpfunc_t *rl_linefunc = NULL;
1.38      christos   82: int rl_done = 0;
                     83: VFunction *rl_event_hook = NULL;
1.70      christos   84: KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
                     85:     emacs_meta_keymap,
                     86:     emacs_ctlx_keymap;
1.108     christos   87: /*
                     88:  * The following is not implemented; we always catch signals in the
                     89:  * libedit fashion: set handlers on entry to el_gets() and clear them
                     90:  * on the way out. This simplistic approach works for most cases; if
                     91:  * it does not work for your application, please let us know.
                     92:  */
                     93: int rl_catch_signals = 1;
                     94: int rl_catch_sigwinch = 1;
1.11      lukem      95:
                     96: int history_base = 1;          /* probably never subject to change */
                     97: int history_length = 0;
                     98: int max_input_history = 0;
                     99: char history_expansion_char = '!';
                    100: char history_subst_char = '^';
1.20      christos  101: char *history_no_expand_chars = expand_chars;
1.11      lukem     102: Function *history_inhibit_expansion_function = NULL;
1.40      christos  103: char *history_arg_extract(int start, int end, const char *str);
1.11      lukem     104:
                    105: int rl_inhibit_completion = 0;
                    106: int rl_attempted_completion_over = 0;
1.20      christos  107: char *rl_basic_word_break_characters = break_chars;
1.11      lukem     108: char *rl_completer_word_break_characters = NULL;
                    109: char *rl_completer_quote_characters = NULL;
1.117     christos  110: rl_compentry_func_t *rl_completion_entry_function = NULL;
1.103     christos  111: char *(*rl_completion_word_break_hook)(void) = NULL;
1.117     christos  112: rl_completion_func_t *rl_attempted_completion_function = NULL;
1.32      christos  113: Function *rl_pre_input_hook = NULL;
                    114: Function *rl_startup1_hook = NULL;
1.72      christos  115: int (*rl_getc_function)(FILE *) = NULL;
1.32      christos  116: char *rl_terminal_name = NULL;
                    117: int rl_already_prompted = 0;
                    118: int rl_filename_completion_desired = 0;
                    119: int rl_ignore_completion_duplicates = 0;
1.70      christos  120: int readline_echoing_p = 1;
                    121: int _rl_print_completions_horizontally = 0;
1.32      christos  122: VFunction *rl_redisplay_function = NULL;
1.33      christos  123: Function *rl_startup_hook = NULL;
1.34      christos  124: VFunction *rl_completion_display_matches_hook = NULL;
1.68      christos  125: VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
                    126: VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
1.85      christos  127: KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
1.1       christos  128:
1.12      jdolecek  129: /*
1.32      christos  130:  * The current prompt string.
                    131:  */
                    132: char *rl_prompt = NULL;
                    133: /*
1.12      jdolecek  134:  * This is set to character indicating type of completion being done by
                    135:  * rl_complete_internal(); this is available for application completion
                    136:  * functions.
                    137:  */
                    138: int rl_completion_type = 0;
                    139:
                    140: /*
                    141:  * If more than this number of items results from query for possible
                    142:  * completions, we ask user if they are sure to really display the list.
                    143:  */
                    144: int rl_completion_query_items = 100;
                    145:
                    146: /*
1.15      jdolecek  147:  * List of characters which are word break characters, but should be left
                    148:  * in the parsed text when it is passed to the completion function.
                    149:  * Shell uses this to help determine what kind of completing to do.
1.12      jdolecek  150:  */
1.53      dsl       151: char *rl_special_prefixes = NULL;
1.15      jdolecek  152:
                    153: /*
                    154:  * This is the character appended to the completed words if at the end of
                    155:  * the line. Default is ' ' (a space).
                    156:  */
                    157: int rl_completion_append_character = ' ';
                    158:
                    159: /* stuff below is used internally by libedit for readline emulation */
                    160:
1.92      christos  161: static History *h = NULL;
1.1       christos  162: static EditLine *e = NULL;
1.116     christos  163: static rl_command_func_t *map[256];
1.70      christos  164: static jmp_buf topbuf;
1.1       christos  165:
                    166: /* internal functions */
1.11      lukem     167: static unsigned char    _el_rl_complete(EditLine *, int);
1.46      christos  168: static unsigned char    _el_rl_tstp(EditLine *, int);
1.11      lukem     169: static char            *_get_prompt(EditLine *);
1.59      christos  170: static int              _getc_function(EditLine *, char *);
1.11      lukem     171: static HIST_ENTRY      *_move_history(int);
1.40      christos  172: static int              _history_expand_command(const char *, size_t, size_t,
                    173:     char **);
1.11      lukem     174: static char            *_rl_compat_sub(const char *, const char *,
1.40      christos  175:     const char *, int);
1.38      christos  176: static int              _rl_event_read_char(EditLine *, char *);
1.49      christos  177: static void             _rl_update_pos(void);
1.1       christos  178:
1.5       christos  179:
                    180: /* ARGSUSED */
1.1       christos  181: static char *
1.30      christos  182: _get_prompt(EditLine *el __attribute__((__unused__)))
1.1       christos  183: {
1.32      christos  184:        rl_already_prompted = 1;
1.96      christos  185:        return rl_prompt;
1.1       christos  186: }
                    187:
1.11      lukem     188:
1.1       christos  189: /*
                    190:  * generic function for moving around history
                    191:  */
1.2       christos  192: static HIST_ENTRY *
1.11      lukem     193: _move_history(int op)
1.1       christos  194: {
1.92      christos  195:        HistEvent ev;
1.1       christos  196:        static HIST_ENTRY rl_he;
                    197:
1.92      christos  198:        if (history(h, &ev, op) != 0)
1.96      christos  199:                return NULL;
1.1       christos  200:
1.92      christos  201:        rl_he.line = ev.str;
1.40      christos  202:        rl_he.data = NULL;
1.1       christos  203:
1.96      christos  204:        return &rl_he;
1.1       christos  205: }
                    206:
                    207:
1.7       simonb    208: /*
1.59      christos  209:  * read one key from user defined input function
                    210:  */
                    211: static int
1.61      christos  212: /*ARGSUSED*/
1.97      christos  213: _getc_function(EditLine *el __attribute__((__unused__)), char *c)
1.59      christos  214: {
                    215:        int i;
                    216:
1.72      christos  217:        i = (*rl_getc_function)(NULL);
1.59      christos  218:        if (i == -1)
                    219:                return 0;
1.99      christos  220:        *c = (char)i;
1.59      christos  221:        return 1;
                    222: }
                    223:
1.91      christos  224: static void
                    225: _resize_fun(EditLine *el, void *a)
                    226: {
                    227:        const LineInfo *li;
                    228:        char **ap = a;
                    229:
                    230:        li = el_line(el);
                    231:        /* a cheesy way to get rid of const cast. */
1.98      christos  232:        *ap = memchr(li->buffer, *li->buffer, (size_t)1);
1.91      christos  233: }
                    234:
1.85      christos  235: static const char *
                    236: _default_history_file(void)
                    237: {
                    238:        struct passwd *p;
1.109     christos  239:        static char *path;
                    240:        size_t len;
1.85      christos  241:
1.109     christos  242:        if (path)
1.85      christos  243:                return path;
1.109     christos  244:
1.85      christos  245:        if ((p = getpwuid(getuid())) == NULL)
                    246:                return NULL;
1.109     christos  247:
                    248:        len = strlen(p->pw_dir) + sizeof("/.history");
                    249:        if ((path = malloc(len)) == NULL)
                    250:                return NULL;
                    251:
                    252:        (void)snprintf(path, len, "%s/.history", p->pw_dir);
1.85      christos  253:        return path;
                    254: }
1.59      christos  255:
                    256: /*
1.7       simonb    257:  * READLINE compatibility stuff
1.1       christos  258:  */
                    259:
                    260: /*
1.78      christos  261:  * Set the prompt
                    262:  */
                    263: int
                    264: rl_set_prompt(const char *prompt)
                    265: {
1.82      christos  266:        char *p;
                    267:
1.78      christos  268:        if (!prompt)
                    269:                prompt = "";
                    270:        if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
                    271:                return 0;
                    272:        if (rl_prompt)
1.95      christos  273:                el_free(rl_prompt);
1.78      christos  274:        rl_prompt = strdup(prompt);
1.82      christos  275:        if (rl_prompt == NULL)
                    276:                return -1;
                    277:
                    278:        while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
                    279:                *p = RL_PROMPT_START_IGNORE;
                    280:
                    281:        return 0;
1.78      christos  282: }
                    283:
                    284: /*
1.1       christos  285:  * initialize rl compat stuff
                    286:  */
                    287: int
1.11      lukem     288: rl_initialize(void)
1.1       christos  289: {
1.92      christos  290:        HistEvent ev;
1.18      christos  291:        int editmode = 1;
                    292:        struct termios t;
1.1       christos  293:
                    294:        if (e != NULL)
                    295:                el_end(e);
                    296:        if (h != NULL)
1.92      christos  297:                history_end(h);
1.1       christos  298:
                    299:        if (!rl_instream)
                    300:                rl_instream = stdin;
                    301:        if (!rl_outstream)
                    302:                rl_outstream = stdout;
1.18      christos  303:
                    304:        /*
                    305:         * See if we don't really want to run the editor
                    306:         */
                    307:        if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
                    308:                editmode = 0;
                    309:
1.4       christos  310:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.18      christos  311:
                    312:        if (!editmode)
1.92      christos  313:                el_set(e, EL_EDITMODE, 0);
1.1       christos  314:
1.92      christos  315:        h = history_init();
1.1       christos  316:        if (!e || !h)
1.96      christos  317:                return -1;
1.1       christos  318:
1.92      christos  319:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  320:        history_length = 0;
                    321:        max_input_history = INT_MAX;
                    322:        el_set(e, EL_HIST, history, h);
                    323:
1.91      christos  324:        /* Setup resize function */
                    325:        el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
                    326:
1.59      christos  327:        /* setup getc function if valid */
                    328:        if (rl_getc_function)
                    329:                el_set(e, EL_GETCFN, _getc_function);
                    330:
1.1       christos  331:        /* for proper prompt printing in readline() */
1.78      christos  332:        if (rl_set_prompt("") == -1) {
1.92      christos  333:                history_end(h);
1.23      christos  334:                el_end(e);
                    335:                return -1;
                    336:        }
1.82      christos  337:        el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
1.39      christos  338:        el_set(e, EL_SIGNAL, rl_catch_signals);
1.1       christos  339:
                    340:        /* set default mode to "emacs"-style and read setting afterwards */
1.112     christos  341:        /* so this can be overridden */
1.1       christos  342:        el_set(e, EL_EDITOR, "emacs");
1.32      christos  343:        if (rl_terminal_name != NULL)
                    344:                el_set(e, EL_TERMINAL, rl_terminal_name);
                    345:        else
                    346:                el_get(e, EL_TERMINAL, &rl_terminal_name);
1.1       christos  347:
1.12      jdolecek  348:        /*
1.35      christos  349:         * Word completion - this has to go AFTER rebinding keys
1.12      jdolecek  350:         * to emacs-style.
                    351:         */
1.1       christos  352:        el_set(e, EL_ADDFN, "rl_complete",
1.35      christos  353:            "ReadLine compatible completion function",
1.11      lukem     354:            _el_rl_complete);
1.1       christos  355:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
1.46      christos  356:
                    357:        /*
                    358:         * Send TSTP when ^Z is pressed.
                    359:         */
                    360:        el_set(e, EL_ADDFN, "rl_tstp",
                    361:            "ReadLine compatible suspend function",
                    362:            _el_rl_tstp);
                    363:        el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
1.12      jdolecek  364:
1.114     christos  365:        /*
                    366:         * Set some readline compatible key-bindings.
                    367:         */
                    368:        el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL);
                    369:
                    370:        /*
                    371:         * Allow the use of Home/End keys.
                    372:         */
                    373:        el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL);
                    374:        el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL);
                    375:        el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL);
                    376:        el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL);
                    377:        el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL);
                    378:        el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL);
                    379:
                    380:        /*
                    381:         * Allow the use of the Delete/Insert keys.
                    382:         */
                    383:        el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL);
                    384:        el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL);
                    385:
                    386:        /*
                    387:         * Ctrl-left-arrow and Ctrl-right-arrow for word moving.
                    388:         */
                    389:        el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL);
                    390:        el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL);
                    391:        el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL);
                    392:        el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL);
                    393:        el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL);
                    394:        el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL);
                    395:
1.1       christos  396:        /* read settings from configuration file */
                    397:        el_source(e, NULL);
                    398:
1.12      jdolecek  399:        /*
                    400:         * Unfortunately, some applications really do use rl_point
                    401:         * and rl_line_buffer directly.
                    402:         */
1.91      christos  403:        _resize_fun(e, &rl_line_buffer);
1.49      christos  404:        _rl_update_pos();
1.1       christos  405:
1.32      christos  406:        if (rl_startup_hook)
                    407:                (*rl_startup_hook)(NULL, 0);
                    408:
1.96      christos  409:        return 0;
1.1       christos  410: }
                    411:
1.11      lukem     412:
1.1       christos  413: /*
                    414:  * read one line from input stream and return it, chomping
                    415:  * trailing newline (if there is any)
                    416:  */
                    417: char *
1.70      christos  418: readline(const char *p)
1.1       christos  419: {
1.92      christos  420:        HistEvent ev;
1.70      christos  421:        const char * volatile prompt = p;
1.3       thorpej   422:        int count;
1.1       christos  423:        const char *ret;
1.20      christos  424:        char *buf;
1.38      christos  425:        static int used_event_hook;
1.1       christos  426:
                    427:        if (e == NULL || h == NULL)
                    428:                rl_initialize();
                    429:
1.38      christos  430:        rl_done = 0;
                    431:
1.70      christos  432:        (void)setjmp(topbuf);
                    433:
1.9       jdolecek  434:        /* update prompt accordingly to what has been passed */
1.78      christos  435:        if (rl_set_prompt(prompt) == -1)
                    436:                return NULL;
1.32      christos  437:
                    438:        if (rl_pre_input_hook)
                    439:                (*rl_pre_input_hook)(NULL, 0);
                    440:
1.38      christos  441:        if (rl_event_hook && !(e->el_flags&NO_TTY)) {
                    442:                el_set(e, EL_GETCFN, _rl_event_read_char);
                    443:                used_event_hook = 1;
                    444:        }
                    445:
                    446:        if (!rl_event_hook && used_event_hook) {
                    447:                el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
                    448:                used_event_hook = 0;
                    449:        }
                    450:
1.32      christos  451:        rl_already_prompted = 0;
                    452:
1.1       christos  453:        /* get one line from input stream */
                    454:        ret = el_gets(e, &count);
                    455:
                    456:        if (ret && count > 0) {
1.5       christos  457:                int lastidx;
1.1       christos  458:
1.20      christos  459:                buf = strdup(ret);
1.23      christos  460:                if (buf == NULL)
                    461:                        return NULL;
1.1       christos  462:                lastidx = count - 1;
1.20      christos  463:                if (buf[lastidx] == '\n')
                    464:                        buf[lastidx] = '\0';
1.1       christos  465:        } else
1.20      christos  466:                buf = NULL;
1.1       christos  467:
1.92      christos  468:        history(h, &ev, H_GETSIZE);
1.1       christos  469:        history_length = ev.num;
                    470:
1.20      christos  471:        return buf;
1.1       christos  472: }
                    473:
                    474: /*
                    475:  * history functions
                    476:  */
                    477:
                    478: /*
                    479:  * is normally called before application starts to use
                    480:  * history expansion functions
                    481:  */
                    482: void
1.11      lukem     483: using_history(void)
1.1       christos  484: {
                    485:        if (h == NULL || e == NULL)
                    486:                rl_initialize();
                    487: }
                    488:
1.11      lukem     489:
1.1       christos  490: /*
                    491:  * substitute ``what'' with ``with'', returning resulting string; if
1.29      wiz       492:  * globally == 1, substitutes all occurrences of what, otherwise only the
1.1       christos  493:  * first one
                    494:  */
1.11      lukem     495: static char *
                    496: _rl_compat_sub(const char *str, const char *what, const char *with,
                    497:     int globally)
                    498: {
1.40      christos  499:        const   char    *s;
                    500:        char    *r, *result;
                    501:        size_t  len, with_len, what_len;
1.1       christos  502:
1.40      christos  503:        len = strlen(str);
                    504:        with_len = strlen(with);
                    505:        what_len = strlen(what);
                    506:
                    507:        /* calculate length we need for result */
                    508:        s = str;
                    509:        while (*s) {
                    510:                if (*s == *what && !strncmp(s, what, what_len)) {
                    511:                        len += with_len - what_len;
                    512:                        if (!globally)
                    513:                                break;
                    514:                        s += what_len;
                    515:                } else
                    516:                        s++;
                    517:        }
1.95      christos  518:        r = result = el_malloc((len + 1) * sizeof(*r));
1.23      christos  519:        if (result == NULL)
                    520:                return NULL;
1.40      christos  521:        s = str;
                    522:        while (*s) {
                    523:                if (*s == *what && !strncmp(s, what, what_len)) {
                    524:                        (void)strncpy(r, with, with_len);
                    525:                        r += with_len;
                    526:                        s += what_len;
                    527:                        if (!globally) {
                    528:                                (void)strcpy(r, s);
1.96      christos  529:                                return result;
1.1       christos  530:                        }
1.40      christos  531:                } else
                    532:                        *r++ = *s++;
                    533:        }
1.76      christos  534:        *r = '\0';
1.96      christos  535:        return result;
1.40      christos  536: }
                    537:
                    538: static char    *last_search_pat;       /* last !?pat[?] search pattern */
                    539: static char    *last_search_match;     /* last !?pat[?] that matched */
                    540:
                    541: const char *
                    542: get_history_event(const char *cmd, int *cindex, int qchar)
                    543: {
                    544:        int idx, sign, sub, num, begin, ret;
                    545:        size_t len;
                    546:        char    *pat;
                    547:        const char *rptr;
1.92      christos  548:        HistEvent ev;
1.40      christos  549:
                    550:        idx = *cindex;
                    551:        if (cmd[idx++] != history_expansion_char)
1.96      christos  552:                return NULL;
1.40      christos  553:
                    554:        /* find out which event to take */
1.76      christos  555:        if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
1.92      christos  556:                if (history(h, &ev, H_FIRST) != 0)
1.96      christos  557:                        return NULL;
1.40      christos  558:                *cindex = cmd[idx]? (idx + 1):idx;
1.92      christos  559:                return ev.str;
1.40      christos  560:        }
                    561:        sign = 0;
                    562:        if (cmd[idx] == '-') {
                    563:                sign = 1;
                    564:                idx++;
                    565:        }
                    566:
                    567:        if ('0' <= cmd[idx] && cmd[idx] <= '9') {
                    568:                HIST_ENTRY *rl_he;
                    569:
                    570:                num = 0;
                    571:                while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
                    572:                        num = num * 10 + cmd[idx] - '0';
                    573:                        idx++;
                    574:                }
                    575:                if (sign)
                    576:                        num = history_length - num + 1;
                    577:
                    578:                if (!(rl_he = history_get(num)))
1.96      christos  579:                        return NULL;
1.40      christos  580:
                    581:                *cindex = idx;
1.96      christos  582:                return rl_he->line;
1.40      christos  583:        }
                    584:        sub = 0;
                    585:        if (cmd[idx] == '?') {
                    586:                sub = 1;
                    587:                idx++;
                    588:        }
                    589:        begin = idx;
                    590:        while (cmd[idx]) {
                    591:                if (cmd[idx] == '\n')
                    592:                        break;
                    593:                if (sub && cmd[idx] == '?')
                    594:                        break;
                    595:                if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
                    596:                                    || cmd[idx] == '\t' || cmd[idx] == qchar))
                    597:                        break;
                    598:                idx++;
                    599:        }
1.99      christos  600:        len = (size_t)idx - (size_t)begin;
1.40      christos  601:        if (sub && cmd[idx] == '?')
                    602:                idx++;
                    603:        if (sub && len == 0 && last_search_pat && *last_search_pat)
                    604:                pat = last_search_pat;
                    605:        else if (len == 0)
1.96      christos  606:                return NULL;
1.40      christos  607:        else {
1.95      christos  608:                if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL)
1.40      christos  609:                        return NULL;
                    610:                (void)strncpy(pat, cmd + begin, len);
                    611:                pat[len] = '\0';
                    612:        }
                    613:
1.92      christos  614:        if (history(h, &ev, H_CURR) != 0) {
1.40      christos  615:                if (pat != last_search_pat)
1.95      christos  616:                        el_free(pat);
1.96      christos  617:                return NULL;
1.40      christos  618:        }
                    619:        num = ev.num;
                    620:
                    621:        if (sub) {
                    622:                if (pat != last_search_pat) {
                    623:                        if (last_search_pat)
1.95      christos  624:                                el_free(last_search_pat);
1.40      christos  625:                        last_search_pat = pat;
1.1       christos  626:                }
1.40      christos  627:                ret = history_search(pat, -1);
                    628:        } else
                    629:                ret = history_search_prefix(pat, -1);
                    630:
                    631:        if (ret == -1) {
                    632:                /* restore to end of list on failed search */
1.92      christos  633:                history(h, &ev, H_FIRST);
1.40      christos  634:                (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
                    635:                if (pat != last_search_pat)
1.95      christos  636:                        el_free(pat);
1.96      christos  637:                return NULL;
1.40      christos  638:        }
                    639:
                    640:        if (sub && len) {
                    641:                if (last_search_match && last_search_match != pat)
1.95      christos  642:                        el_free(last_search_match);
1.40      christos  643:                last_search_match = pat;
                    644:        }
                    645:
                    646:        if (pat != last_search_pat)
1.95      christos  647:                el_free(pat);
1.40      christos  648:
1.92      christos  649:        if (history(h, &ev, H_CURR) != 0)
1.96      christos  650:                return NULL;
1.40      christos  651:        *cindex = idx;
1.92      christos  652:        rptr = ev.str;
1.40      christos  653:
                    654:        /* roll back to original position */
1.92      christos  655:        (void)history(h, &ev, H_SET, num);
1.1       christos  656:
1.40      christos  657:        return rptr;
1.1       christos  658: }
                    659:
                    660: /*
                    661:  * the real function doing history expansion - takes as argument command
                    662:  * to do and data upon which the command should be executed
                    663:  * does expansion the way I've understood readline documentation
                    664:  *
                    665:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    666:  * should be only printed and not executed; in case of error,
                    667:  * returns -1 and *result points to NULL
1.113     snj       668:  * it's the caller's responsibility to free() the string returned in *result
1.1       christos  669:  */
                    670: static int
1.40      christos  671: _history_expand_command(const char *command, size_t offs, size_t cmdlen,
                    672:     char **result)
1.11      lukem     673: {
1.40      christos  674:        char *tmp, *search = NULL, *aptr;
                    675:        const char *ptr, *cmd;
1.11      lukem     676:        static char *from = NULL, *to = NULL;
1.40      christos  677:        int start, end, idx, has_mods = 0;
                    678:        int p_on = 0, g_on = 0;
1.1       christos  679:
                    680:        *result = NULL;
1.40      christos  681:        aptr = NULL;
1.41      christos  682:        ptr = NULL;
1.1       christos  683:
1.40      christos  684:        /* First get event specifier */
                    685:        idx = 0;
1.1       christos  686:
1.40      christos  687:        if (strchr(":^*$", command[offs + 1])) {
                    688:                char str[4];
                    689:                /*
                    690:                * "!:" is shorthand for "!!:".
                    691:                * "!^", "!*" and "!$" are shorthand for
                    692:                * "!!:^", "!!:*" and "!!:$" respectively.
                    693:                */
                    694:                str[0] = str[1] = '!';
                    695:                str[2] = '0';
                    696:                ptr = get_history_event(str, &idx, 0);
                    697:                idx = (command[offs + 1] == ':')? 1:0;
                    698:                has_mods = 1;
1.1       christos  699:        } else {
1.40      christos  700:                if (command[offs + 1] == '#') {
                    701:                        /* use command so far */
1.95      christos  702:                        if ((aptr = el_malloc((offs + 1) * sizeof(*aptr)))
                    703:                            == NULL)
1.40      christos  704:                                return -1;
                    705:                        (void)strncpy(aptr, command, offs);
                    706:                        aptr[offs] = '\0';
                    707:                        idx = 1;
1.1       christos  708:                } else {
1.40      christos  709:                        int     qchar;
                    710:
                    711:                        qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
                    712:                        ptr = get_history_event(command + offs, &idx, qchar);
                    713:                }
1.99      christos  714:                has_mods = command[offs + (size_t)idx] == ':';
1.40      christos  715:        }
1.1       christos  716:
1.40      christos  717:        if (ptr == NULL && aptr == NULL)
1.96      christos  718:                return -1;
1.1       christos  719:
1.40      christos  720:        if (!has_mods) {
1.85      christos  721:                *result = strdup(aptr ? aptr : ptr);
1.40      christos  722:                if (aptr)
1.95      christos  723:                        el_free(aptr);
1.85      christos  724:                if (*result == NULL)
                    725:                        return -1;
1.96      christos  726:                return 1;
1.40      christos  727:        }
                    728:
                    729:        cmd = command + offs + idx + 1;
                    730:
                    731:        /* Now parse any word designators */
                    732:
                    733:        if (*cmd == '%')        /* last word matched by ?pat? */
                    734:                tmp = strdup(last_search_match? last_search_match:"");
                    735:        else if (strchr("^*$-0123456789", *cmd)) {
                    736:                start = end = -1;
                    737:                if (*cmd == '^')
                    738:                        start = end = 1, cmd++;
                    739:                else if (*cmd == '$')
                    740:                        start = -1, cmd++;
                    741:                else if (*cmd == '*')
                    742:                        start = 1, cmd++;
                    743:               else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
                    744:                        start = 0;
                    745:                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    746:                                start = start * 10 + *cmd++ - '0';
                    747:
                    748:                        if (*cmd == '-') {
                    749:                                if (isdigit((unsigned char) cmd[1])) {
                    750:                                        cmd++;
                    751:                                        end = 0;
                    752:                                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    753:                                                end = end * 10 + *cmd++ - '0';
                    754:                                } else if (cmd[1] == '$') {
                    755:                                        cmd += 2;
                    756:                                        end = -1;
                    757:                                } else {
                    758:                                        cmd++;
                    759:                                        end = -2;
                    760:                                }
                    761:                        } else if (*cmd == '*')
                    762:                                end = -1, cmd++;
1.1       christos  763:                        else
1.40      christos  764:                                end = start;
                    765:                }
                    766:                tmp = history_arg_extract(start, end, aptr? aptr:ptr);
                    767:                if (tmp == NULL) {
                    768:                        (void)fprintf(rl_outstream, "%s: Bad word specifier",
                    769:                            command + offs + idx);
                    770:                        if (aptr)
1.95      christos  771:                                el_free(aptr);
1.96      christos  772:                        return -1;
1.40      christos  773:                }
                    774:        } else
                    775:                tmp = strdup(aptr? aptr:ptr);
1.1       christos  776:
1.40      christos  777:        if (aptr)
1.95      christos  778:                el_free(aptr);
1.1       christos  779:
1.77      lukem     780:        if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
1.40      christos  781:                *result = tmp;
1.96      christos  782:                return 1;
1.1       christos  783:        }
                    784:
                    785:        for (; *cmd; cmd++) {
                    786:                if (*cmd == ':')
                    787:                        continue;
1.40      christos  788:                else if (*cmd == 'h') {         /* remove trailing path */
                    789:                        if ((aptr = strrchr(tmp, '/')) != NULL)
1.76      christos  790:                                *aptr = '\0';
1.40      christos  791:                } else if (*cmd == 't') {       /* remove leading path */
                    792:                        if ((aptr = strrchr(tmp, '/')) != NULL) {
                    793:                                aptr = strdup(aptr + 1);
1.95      christos  794:                                el_free(tmp);
1.40      christos  795:                                tmp = aptr;
                    796:                        }
                    797:                } else if (*cmd == 'r') {       /* remove trailing suffix */
                    798:                        if ((aptr = strrchr(tmp, '.')) != NULL)
1.76      christos  799:                                *aptr = '\0';
1.40      christos  800:                } else if (*cmd == 'e') {       /* remove all but suffix */
                    801:                        if ((aptr = strrchr(tmp, '.')) != NULL) {
                    802:                                aptr = strdup(aptr);
1.95      christos  803:                                el_free(tmp);
1.40      christos  804:                                tmp = aptr;
                    805:                        }
                    806:                } else if (*cmd == 'p')         /* print only */
                    807:                        p_on = 1;
1.1       christos  808:                else if (*cmd == 'g')
                    809:                        g_on = 2;
                    810:                else if (*cmd == 's' || *cmd == '&') {
1.11      lukem     811:                        char *what, *with, delim;
1.30      christos  812:                        size_t len, from_len;
1.5       christos  813:                        size_t size;
1.1       christos  814:
                    815:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    816:                                continue;
                    817:                        else if (*cmd == 's') {
                    818:                                delim = *(++cmd), cmd++;
                    819:                                size = 16;
1.95      christos  820:                                what = el_realloc(from, size * sizeof(*what));
1.23      christos  821:                                if (what == NULL) {
1.95      christos  822:                                        el_free(from);
                    823:                                        el_free(tmp);
1.28      christos  824:                                        return 0;
1.23      christos  825:                                }
1.1       christos  826:                                len = 0;
                    827:                                for (; *cmd && *cmd != delim; cmd++) {
1.40      christos  828:                                        if (*cmd == '\\' && cmd[1] == delim)
1.1       christos  829:                                                cmd++;
1.23      christos  830:                                        if (len >= size) {
                    831:                                                char *nwhat;
1.95      christos  832:                                                nwhat = el_realloc(what,
                    833:                                                    (size <<= 1) *
                    834:                                                    sizeof(*nwhat));
1.23      christos  835:                                                if (nwhat == NULL) {
1.95      christos  836:                                                        el_free(what);
                    837:                                                        el_free(tmp);
1.28      christos  838:                                                        return 0;
1.23      christos  839:                                                }
                    840:                                                what = nwhat;
                    841:                                        }
1.1       christos  842:                                        what[len++] = *cmd;
                    843:                                }
                    844:                                what[len] = '\0';
                    845:                                from = what;
                    846:                                if (*what == '\0') {
1.95      christos  847:                                        el_free(what);
1.23      christos  848:                                        if (search) {
1.1       christos  849:                                                from = strdup(search);
1.62      christos  850:                                                if (from == NULL) {
1.95      christos  851:                                                        el_free(tmp);
1.28      christos  852:                                                        return 0;
1.62      christos  853:                                                }
1.23      christos  854:                                        } else {
1.1       christos  855:                                                from = NULL;
1.95      christos  856:                                                el_free(tmp);
1.96      christos  857:                                                return -1;
1.1       christos  858:                                        }
                    859:                                }
                    860:                                cmd++;  /* shift after delim */
                    861:                                if (!*cmd)
                    862:                                        continue;
                    863:
                    864:                                size = 16;
1.95      christos  865:                                with = el_realloc(to, size * sizeof(*with));
1.23      christos  866:                                if (with == NULL) {
1.95      christos  867:                                        el_free(to);
                    868:                                        el_free(tmp);
1.23      christos  869:                                        return -1;
                    870:                                }
1.1       christos  871:                                len = 0;
                    872:                                from_len = strlen(from);
                    873:                                for (; *cmd && *cmd != delim; cmd++) {
                    874:                                        if (len + from_len + 1 >= size) {
1.23      christos  875:                                                char *nwith;
1.1       christos  876:                                                size += from_len + 1;
1.95      christos  877:                                                nwith = el_realloc(with,
                    878:                                                    size * sizeof(*nwith));
1.23      christos  879:                                                if (nwith == NULL) {
1.95      christos  880:                                                        el_free(with);
                    881:                                                        el_free(tmp);
1.23      christos  882:                                                        return -1;
                    883:                                                }
                    884:                                                with = nwith;
1.1       christos  885:                                        }
                    886:                                        if (*cmd == '&') {
                    887:                                                /* safe */
1.40      christos  888:                                                (void)strcpy(&with[len], from);
1.1       christos  889:                                                len += from_len;
                    890:                                                continue;
                    891:                                        }
                    892:                                        if (*cmd == '\\'
                    893:                                            && (*(cmd + 1) == delim
                    894:                                                || *(cmd + 1) == '&'))
                    895:                                                cmd++;
                    896:                                        with[len++] = *cmd;
                    897:                                }
                    898:                                with[len] = '\0';
                    899:                                to = with;
                    900:                        }
                    901:
1.40      christos  902:                        aptr = _rl_compat_sub(tmp, from, to, g_on);
                    903:                        if (aptr) {
1.95      christos  904:                                el_free(tmp);
1.40      christos  905:                                tmp = aptr;
1.23      christos  906:                        }
1.40      christos  907:                        g_on = 0;
1.1       christos  908:                }
1.5       christos  909:        }
1.40      christos  910:        *result = tmp;
1.96      christos  911:        return p_on? 2:1;
1.1       christos  912: }
                    913:
1.11      lukem     914:
1.1       christos  915: /*
                    916:  * csh-style history expansion
                    917:  */
                    918: int
1.11      lukem     919: history_expand(char *str, char **output)
                    920: {
1.40      christos  921:        int ret = 0;
                    922:        size_t idx, i, size;
                    923:        char *tmp, *result;
1.1       christos  924:
                    925:        if (h == NULL || e == NULL)
                    926:                rl_initialize();
                    927:
1.40      christos  928:        if (history_expansion_char == 0) {
                    929:                *output = strdup(str);
1.96      christos  930:                return 0;
1.40      christos  931:        }
1.1       christos  932:
1.40      christos  933:        *output = NULL;
1.1       christos  934:        if (str[0] == history_subst_char) {
                    935:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
1.100     christos  936:                *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output));
1.40      christos  937:                if (*output == NULL)
                    938:                        return 0;
                    939:                (*output)[0] = (*output)[1] = history_expansion_char;
                    940:                (*output)[2] = ':';
                    941:                (*output)[3] = 's';
                    942:                (void)strcpy((*output) + 4, str);
                    943:                str = *output;
                    944:        } else {
                    945:                *output = strdup(str);
                    946:                if (*output == NULL)
                    947:                        return 0;
1.1       christos  948:        }
1.40      christos  949:
1.63      christos  950: #define ADD_STRING(what, len, fr)                                      \
1.1       christos  951:        {                                                               \
1.23      christos  952:                if (idx + len + 1 > size) {                             \
1.95      christos  953:                        char *nresult = el_realloc(result,              \
                    954:                            (size += len + 1) * sizeof(*nresult));      \
1.23      christos  955:                        if (nresult == NULL) {                          \
1.95      christos  956:                                el_free(*output);                       \
1.65      christos  957:                                if (/*CONSTCOND*/fr)                    \
1.95      christos  958:                                        el_free(tmp);                   \
1.28      christos  959:                                return 0;                               \
1.23      christos  960:                        }                                               \
                    961:                        result = nresult;                               \
                    962:                }                                                       \
1.1       christos  963:                (void)strncpy(&result[idx], what, len);                 \
                    964:                idx += len;                                             \
                    965:                result[idx] = '\0';                                     \
                    966:        }
                    967:
                    968:        result = NULL;
                    969:        size = idx = 0;
1.64      christos  970:        tmp = NULL;
1.1       christos  971:        for (i = 0; str[i];) {
1.40      christos  972:                int qchar, loop_again;
                    973:                size_t len, start, j;
1.1       christos  974:
1.40      christos  975:                qchar = 0;
1.1       christos  976:                loop_again = 1;
                    977:                start = j = i;
                    978: loop:
                    979:                for (; str[j]; j++) {
                    980:                        if (str[j] == '\\' &&
                    981:                            str[j + 1] == history_expansion_char) {
1.115     christos  982:                                len = strlen(&str[j + 1]) + 1;
                    983:                                memmove(&str[j], &str[j + 1], len);
1.1       christos  984:                                continue;
                    985:                        }
                    986:                        if (!loop_again) {
1.40      christos  987:                                if (isspace((unsigned char) str[j])
                    988:                                    || str[j] == qchar)
1.1       christos  989:                                        break;
                    990:                        }
                    991:                        if (str[j] == history_expansion_char
                    992:                            && !strchr(history_no_expand_chars, str[j + 1])
                    993:                            && (!history_inhibit_expansion_function ||
1.40      christos  994:                            (*history_inhibit_expansion_function)(str,
                    995:                            (int)j) == 0))
1.1       christos  996:                                break;
                    997:                }
                    998:
1.40      christos  999:                if (str[j] && loop_again) {
1.1       christos 1000:                        i = j;
1.40      christos 1001:                        qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
1.1       christos 1002:                        j++;
                   1003:                        if (str[j] == history_expansion_char)
                   1004:                                j++;
                   1005:                        loop_again = 0;
                   1006:                        goto loop;
                   1007:                }
                   1008:                len = i - start;
1.64      christos 1009:                ADD_STRING(&str[start], len, 0);
1.1       christos 1010:
1.40      christos 1011:                if (str[i] == '\0' || str[i] != history_expansion_char) {
1.1       christos 1012:                        len = j - i;
1.64      christos 1013:                        ADD_STRING(&str[i], len, 0);
1.1       christos 1014:                        if (start == 0)
1.40      christos 1015:                                ret = 0;
1.1       christos 1016:                        else
1.40      christos 1017:                                ret = 1;
1.1       christos 1018:                        break;
                   1019:                }
1.40      christos 1020:                ret = _history_expand_command (str, i, (j - i), &tmp);
                   1021:                if (ret > 0 && tmp) {
                   1022:                        len = strlen(tmp);
1.63      christos 1023:                        ADD_STRING(tmp, len, 1);
1.66      christos 1024:                }
                   1025:                if (tmp) {
1.95      christos 1026:                        el_free(tmp);
1.64      christos 1027:                        tmp = NULL;
1.1       christos 1028:                }
                   1029:                i = j;
1.40      christos 1030:        }
1.1       christos 1031:
1.40      christos 1032:        /* ret is 2 for "print only" option */
                   1033:        if (ret == 2) {
                   1034:                add_history(result);
1.1       christos 1035: #ifdef GDB_411_HACK
                   1036:                /* gdb 4.11 has been shipped with readline, where */
                   1037:                /* history_expand() returned -1 when the line     */
                   1038:                /* should not be executed; in readline 2.1+       */
                   1039:                /* it should return 2 in such a case              */
1.40      christos 1040:                ret = -1;
1.1       christos 1041: #endif
                   1042:        }
1.95      christos 1043:        el_free(*output);
1.1       christos 1044:        *output = result;
                   1045:
1.96      christos 1046:        return ret;
1.1       christos 1047: }
                   1048:
1.40      christos 1049: /*
                   1050: * Return a string consisting of arguments of "str" from "start" to "end".
                   1051: */
                   1052: char *
                   1053: history_arg_extract(int start, int end, const char *str)
                   1054: {
                   1055:        size_t  i, len, max;
1.84      christos 1056:        char    **arr, *result = NULL;
1.40      christos 1057:
                   1058:        arr = history_tokenize(str);
                   1059:        if (!arr)
1.84      christos 1060:                return NULL;
                   1061:        if (arr && *arr == NULL)
                   1062:                goto out;
1.40      christos 1063:
                   1064:        for (max = 0; arr[max]; max++)
                   1065:                continue;
                   1066:        max--;
                   1067:
                   1068:        if (start == '$')
1.80      christos 1069:                start = (int)max;
1.40      christos 1070:        if (end == '$')
1.80      christos 1071:                end = (int)max;
1.40      christos 1072:        if (end < 0)
1.80      christos 1073:                end = (int)max + end + 1;
1.40      christos 1074:        if (start < 0)
                   1075:                start = end;
                   1076:
1.84      christos 1077:        if (start < 0 || end < 0 || (size_t)start > max ||
                   1078:            (size_t)end > max || start > end)
                   1079:                goto out;
1.40      christos 1080:
1.99      christos 1081:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++)
1.40      christos 1082:                len += strlen(arr[i]) + 1;
                   1083:        len++;
1.95      christos 1084:        result = el_malloc(len * sizeof(*result));
1.40      christos 1085:        if (result == NULL)
1.84      christos 1086:                goto out;
1.40      christos 1087:
1.99      christos 1088:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++) {
1.40      christos 1089:                (void)strcpy(result + len, arr[i]);
                   1090:                len += strlen(arr[i]);
1.77      lukem    1091:                if (i < (size_t)end)
1.40      christos 1092:                        result[len++] = ' ';
                   1093:        }
1.76      christos 1094:        result[len] = '\0';
1.40      christos 1095:
1.84      christos 1096: out:
1.40      christos 1097:        for (i = 0; arr[i]; i++)
1.95      christos 1098:                el_free(arr[i]);
                   1099:        el_free(arr);
1.40      christos 1100:
1.84      christos 1101:        return result;
1.40      christos 1102: }
1.11      lukem    1103:
1.1       christos 1104: /*
1.40      christos 1105:  * Parse the string into individual tokens,
                   1106:  * similar to how shell would do it.
1.1       christos 1107:  */
                   1108: char **
1.11      lukem    1109: history_tokenize(const char *str)
1.1       christos 1110: {
1.40      christos 1111:        int size = 1, idx = 0, i, start;
1.5       christos 1112:        size_t len;
1.1       christos 1113:        char **result = NULL, *temp, delim = '\0';
                   1114:
1.40      christos 1115:        for (i = 0; str[i];) {
1.4       christos 1116:                while (isspace((unsigned char) str[i]))
1.1       christos 1117:                        i++;
                   1118:                start = i;
1.40      christos 1119:                for (; str[i];) {
1.9       jdolecek 1120:                        if (str[i] == '\\') {
1.14      jdolecek 1121:                                if (str[i+1] != '\0')
1.9       jdolecek 1122:                                        i++;
                   1123:                        } else if (str[i] == delim)
1.1       christos 1124:                                delim = '\0';
                   1125:                        else if (!delim &&
1.11      lukem    1126:                                    (isspace((unsigned char) str[i]) ||
                   1127:                                strchr("()<>;&|$", str[i])))
1.1       christos 1128:                                break;
                   1129:                        else if (!delim && strchr("'`\"", str[i]))
                   1130:                                delim = str[i];
1.40      christos 1131:                        if (str[i])
                   1132:                                i++;
1.1       christos 1133:                }
                   1134:
1.40      christos 1135:                if (idx + 2 >= size) {
1.23      christos 1136:                        char **nresult;
1.1       christos 1137:                        size <<= 1;
1.99      christos 1138:                        nresult = el_realloc(result, (size_t)size * sizeof(*nresult));
1.23      christos 1139:                        if (nresult == NULL) {
1.95      christos 1140:                                el_free(result);
1.23      christos 1141:                                return NULL;
                   1142:                        }
                   1143:                        result = nresult;
1.1       christos 1144:                }
1.99      christos 1145:                len = (size_t)i - (size_t)start;
                   1146:                temp = el_malloc((size_t)(len + 1) * sizeof(*temp));
1.23      christos 1147:                if (temp == NULL) {
1.40      christos 1148:                        for (i = 0; i < idx; i++)
1.95      christos 1149:                                el_free(result[i]);
                   1150:                        el_free(result);
1.23      christos 1151:                        return NULL;
                   1152:                }
1.40      christos 1153:                (void)strncpy(temp, &str[start], len);
1.1       christos 1154:                temp[len] = '\0';
1.40      christos 1155:                result[idx++] = temp;
                   1156:                result[idx] = NULL;
                   1157:                if (str[i])
                   1158:                        i++;
1.1       christos 1159:        }
1.96      christos 1160:        return result;
1.1       christos 1161: }
                   1162:
1.11      lukem    1163:
1.1       christos 1164: /*
                   1165:  * limit size of history record to ``max'' events
                   1166:  */
                   1167: void
1.11      lukem    1168: stifle_history(int max)
1.1       christos 1169: {
1.92      christos 1170:        HistEvent ev;
1.1       christos 1171:
                   1172:        if (h == NULL || e == NULL)
                   1173:                rl_initialize();
                   1174:
1.92      christos 1175:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos 1176:                max_input_history = max;
                   1177: }
                   1178:
1.11      lukem    1179:
1.1       christos 1180: /*
                   1181:  * "unlimit" size of history - set the limit to maximum allowed int value
                   1182:  */
                   1183: int
1.11      lukem    1184: unstifle_history(void)
1.1       christos 1185: {
1.92      christos 1186:        HistEvent ev;
1.1       christos 1187:        int omax;
                   1188:
1.92      christos 1189:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos 1190:        omax = max_input_history;
                   1191:        max_input_history = INT_MAX;
1.96      christos 1192:        return omax;            /* some value _must_ be returned */
1.1       christos 1193: }
                   1194:
1.11      lukem    1195:
1.1       christos 1196: int
1.11      lukem    1197: history_is_stifled(void)
1.1       christos 1198: {
1.11      lukem    1199:
1.1       christos 1200:        /* cannot return true answer */
1.96      christos 1201:        return max_input_history != INT_MAX;
1.1       christos 1202: }
                   1203:
1.85      christos 1204: static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
                   1205:
                   1206: int
                   1207: history_truncate_file (const char *filename, int nlines)
                   1208: {
                   1209:        int ret = 0;
                   1210:        FILE *fp, *tp;
                   1211:        char template[sizeof(_history_tmp_template)];
                   1212:        char buf[4096];
                   1213:        int fd;
                   1214:        char *cp;
                   1215:        off_t off;
                   1216:        int count = 0;
                   1217:        ssize_t left = 0;
                   1218:
                   1219:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1220:                return errno;
                   1221:        if ((fp = fopen(filename, "r+")) == NULL)
                   1222:                return errno;
                   1223:        strcpy(template, _history_tmp_template);
                   1224:        if ((fd = mkstemp(template)) == -1) {
                   1225:                ret = errno;
                   1226:                goto out1;
                   1227:        }
                   1228:
                   1229:        if ((tp = fdopen(fd, "r+")) == NULL) {
                   1230:                close(fd);
                   1231:                ret = errno;
                   1232:                goto out2;
                   1233:        }
                   1234:
                   1235:        for(;;) {
1.98      christos 1236:                if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) {
1.85      christos 1237:                        if (ferror(fp)) {
                   1238:                                ret = errno;
                   1239:                                break;
                   1240:                        }
                   1241:                        if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
                   1242:                            (off_t)-1) {
                   1243:                                ret = errno;
                   1244:                                break;
                   1245:                        }
1.99      christos 1246:                        left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp);
1.85      christos 1247:                        if (ferror(fp)) {
                   1248:                                ret = errno;
                   1249:                                break;
                   1250:                        }
                   1251:                        if (left == 0) {
                   1252:                                count--;
                   1253:                                left = sizeof(buf);
1.98      christos 1254:                        } else if (fwrite(buf, (size_t)left, (size_t)1, tp)
                   1255:                            != 1) {
1.85      christos 1256:                                ret = errno;
                   1257:                                break;
                   1258:                        }
                   1259:                        fflush(tp);
                   1260:                        break;
                   1261:                }
1.98      christos 1262:                if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1263:                        ret = errno;
                   1264:                        break;
                   1265:                }
                   1266:                count++;
                   1267:        }
                   1268:        if (ret)
                   1269:                goto out3;
                   1270:        cp = buf + left - 1;
                   1271:        if(*cp != '\n')
                   1272:                cp++;
                   1273:        for(;;) {
                   1274:                while (--cp >= buf) {
                   1275:                        if (*cp == '\n') {
                   1276:                                if (--nlines == 0) {
                   1277:                                        if (++cp >= buf + sizeof(buf)) {
                   1278:                                                count++;
                   1279:                                                cp = buf;
                   1280:                                        }
                   1281:                                        break;
                   1282:                                }
                   1283:                        }
                   1284:                }
                   1285:                if (nlines <= 0 || count == 0)
                   1286:                        break;
                   1287:                count--;
                   1288:                if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
                   1289:                        ret = errno;
                   1290:                        break;
                   1291:                }
1.98      christos 1292:                if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1293:                        if (ferror(tp)) {
                   1294:                                ret = errno;
                   1295:                                break;
                   1296:                        }
                   1297:                        ret = EAGAIN;
                   1298:                        break;
                   1299:                }
                   1300:                cp = buf + sizeof(buf);
                   1301:        }
                   1302:
                   1303:        if (ret || nlines > 0)
                   1304:                goto out3;
                   1305:
1.98      christos 1306:        if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) {
1.85      christos 1307:                ret = errno;
                   1308:                goto out3;
                   1309:        }
                   1310:
                   1311:        if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
                   1312:            (off_t)-1) {
                   1313:                ret = errno;
                   1314:                goto out3;
                   1315:        }
                   1316:
                   1317:        for(;;) {
1.99      christos 1318:                if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) {
1.85      christos 1319:                        if (ferror(fp))
                   1320:                                ret = errno;
                   1321:                        break;
                   1322:                }
1.98      christos 1323:                if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) {
1.85      christos 1324:                        ret = errno;
                   1325:                        break;
                   1326:                }
                   1327:        }
                   1328:        fflush(fp);
                   1329:        if((off = ftello(fp)) > 0)
                   1330:                (void)ftruncate(fileno(fp), off);
                   1331: out3:
                   1332:        fclose(tp);
                   1333: out2:
                   1334:        unlink(template);
                   1335: out1:
                   1336:        fclose(fp);
                   1337:
                   1338:        return ret;
                   1339: }
                   1340:
1.11      lukem    1341:
1.1       christos 1342: /*
                   1343:  * read history from a file given
                   1344:  */
                   1345: int
1.11      lukem    1346: read_history(const char *filename)
1.1       christos 1347: {
1.92      christos 1348:        HistEvent ev;
1.1       christos 1349:
                   1350:        if (h == NULL || e == NULL)
                   1351:                rl_initialize();
1.85      christos 1352:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1353:                return errno;
1.96      christos 1354:        return history(h, &ev, H_LOAD, filename) == -1 ?
                   1355:            (errno ? errno : EINVAL) : 0;
1.1       christos 1356: }
                   1357:
1.11      lukem    1358:
1.1       christos 1359: /*
                   1360:  * write history to a file given
                   1361:  */
                   1362: int
1.11      lukem    1363: write_history(const char *filename)
1.1       christos 1364: {
1.92      christos 1365:        HistEvent ev;
1.1       christos 1366:
                   1367:        if (h == NULL || e == NULL)
                   1368:                rl_initialize();
1.85      christos 1369:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1370:                return errno;
1.96      christos 1371:        return history(h, &ev, H_SAVE, filename) == -1 ?
                   1372:            (errno ? errno : EINVAL) : 0;
1.1       christos 1373: }
                   1374:
1.11      lukem    1375:
1.1       christos 1376: /*
                   1377:  * returns history ``num''th event
                   1378:  *
                   1379:  * returned pointer points to static variable
                   1380:  */
1.2       christos 1381: HIST_ENTRY *
1.11      lukem    1382: history_get(int num)
1.1       christos 1383: {
                   1384:        static HIST_ENTRY she;
1.92      christos 1385:        HistEvent ev;
1.40      christos 1386:        int curr_num;
1.1       christos 1387:
                   1388:        if (h == NULL || e == NULL)
                   1389:                rl_initialize();
                   1390:
1.40      christos 1391:        /* save current position */
1.92      christos 1392:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1393:                return NULL;
1.1       christos 1394:        curr_num = ev.num;
1.40      christos 1395:
1.85      christos 1396:        /* start from the oldest */
1.92      christos 1397:        if (history(h, &ev, H_LAST) != 0)
1.96      christos 1398:                return NULL;    /* error */
1.40      christos 1399:
1.85      christos 1400:        /* look forwards for event matching specified offset */
1.92      christos 1401:        if (history(h, &ev, H_NEXT_EVDATA, num, &she.data))
1.96      christos 1402:                return NULL;
1.1       christos 1403:
1.92      christos 1404:        she.line = ev.str;
1.1       christos 1405:
1.40      christos 1406:        /* restore pointer to where it was */
1.92      christos 1407:        (void)history(h, &ev, H_SET, curr_num);
1.1       christos 1408:
1.96      christos 1409:        return &she;
1.1       christos 1410: }
                   1411:
1.11      lukem    1412:
1.1       christos 1413: /*
                   1414:  * add the line to history table
                   1415:  */
                   1416: int
1.11      lukem    1417: add_history(const char *line)
1.1       christos 1418: {
1.92      christos 1419:        HistEvent ev;
1.1       christos 1420:
1.104     christos 1421:        if (line == NULL)
                   1422:                return 0;
                   1423:
1.1       christos 1424:        if (h == NULL || e == NULL)
                   1425:                rl_initialize();
                   1426:
1.92      christos 1427:        (void)history(h, &ev, H_ENTER, line);
                   1428:        if (history(h, &ev, H_GETSIZE) == 0)
1.1       christos 1429:                history_length = ev.num;
                   1430:
1.96      christos 1431:        return !(history_length > 0); /* return 0 if all is okay */
1.1       christos 1432: }
                   1433:
1.11      lukem    1434:
1.1       christos 1435: /*
1.58      christos 1436:  * remove the specified entry from the history list and return it.
                   1437:  */
                   1438: HIST_ENTRY *
                   1439: remove_history(int num)
                   1440: {
1.85      christos 1441:        HIST_ENTRY *he;
1.92      christos 1442:        HistEvent ev;
1.58      christos 1443:
                   1444:        if (h == NULL || e == NULL)
                   1445:                rl_initialize();
                   1446:
1.95      christos 1447:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.58      christos 1448:                return NULL;
                   1449:
1.92      christos 1450:        if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1.95      christos 1451:                el_free(he);
1.71      christos 1452:                return NULL;
1.85      christos 1453:        }
1.71      christos 1454:
1.92      christos 1455:        he->line = ev.str;
                   1456:        if (history(h, &ev, H_GETSIZE) == 0)
1.85      christos 1457:                history_length = ev.num;
1.58      christos 1458:
1.85      christos 1459:        return he;
1.58      christos 1460: }
                   1461:
                   1462:
                   1463: /*
1.85      christos 1464:  * replace the line and data of the num-th entry
                   1465:  */
                   1466: HIST_ENTRY *
                   1467: replace_history_entry(int num, const char *line, histdata_t data)
                   1468: {
                   1469:        HIST_ENTRY *he;
1.92      christos 1470:        HistEvent ev;
1.85      christos 1471:        int curr_num;
                   1472:
                   1473:        if (h == NULL || e == NULL)
                   1474:                rl_initialize();
                   1475:
                   1476:        /* save current position */
1.92      christos 1477:        if (history(h, &ev, H_CURR) != 0)
1.85      christos 1478:                return NULL;
                   1479:        curr_num = ev.num;
                   1480:
                   1481:        /* start from the oldest */
1.92      christos 1482:        if (history(h, &ev, H_LAST) != 0)
1.85      christos 1483:                return NULL;    /* error */
                   1484:
1.95      christos 1485:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.85      christos 1486:                return NULL;
                   1487:
                   1488:        /* look forwards for event matching specified offset */
1.92      christos 1489:        if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1.85      christos 1490:                goto out;
                   1491:
1.92      christos 1492:        he->line = strdup(ev.str);
1.85      christos 1493:        if (he->line == NULL)
                   1494:                goto out;
                   1495:
1.92      christos 1496:        if (history(h, &ev, H_REPLACE, line, data))
1.85      christos 1497:                goto out;
                   1498:
                   1499:        /* restore pointer to where it was */
1.92      christos 1500:        if (history(h, &ev, H_SET, curr_num))
1.85      christos 1501:                goto out;
                   1502:
                   1503:        return he;
                   1504: out:
1.95      christos 1505:        el_free(he);
1.85      christos 1506:        return NULL;
                   1507: }
                   1508:
                   1509: /*
1.1       christos 1510:  * clear the history list - delete all entries
                   1511:  */
                   1512: void
1.11      lukem    1513: clear_history(void)
1.1       christos 1514: {
1.92      christos 1515:        HistEvent ev;
1.11      lukem    1516:
1.110     christos 1517:        if (h == NULL || e == NULL)
                   1518:                rl_initialize();
                   1519:
1.92      christos 1520:        (void)history(h, &ev, H_CLEAR);
1.85      christos 1521:        history_length = 0;
1.1       christos 1522: }
                   1523:
1.11      lukem    1524:
1.1       christos 1525: /*
                   1526:  * returns offset of the current history event
                   1527:  */
                   1528: int
1.11      lukem    1529: where_history(void)
1.1       christos 1530: {
1.92      christos 1531:        HistEvent ev;
1.1       christos 1532:        int curr_num, off;
                   1533:
1.92      christos 1534:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1535:                return 0;
1.1       christos 1536:        curr_num = ev.num;
                   1537:
1.92      christos 1538:        (void)history(h, &ev, H_FIRST);
1.1       christos 1539:        off = 1;
1.92      christos 1540:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1.1       christos 1541:                off++;
                   1542:
1.96      christos 1543:        return off;
1.1       christos 1544: }
                   1545:
1.11      lukem    1546:
1.1       christos 1547: /*
                   1548:  * returns current history event or NULL if there is no such event
                   1549:  */
1.2       christos 1550: HIST_ENTRY *
1.11      lukem    1551: current_history(void)
1.1       christos 1552: {
1.11      lukem    1553:
1.96      christos 1554:        return _move_history(H_CURR);
1.1       christos 1555: }
                   1556:
1.11      lukem    1557:
1.1       christos 1558: /*
                   1559:  * returns total number of bytes history events' data are using
                   1560:  */
                   1561: int
1.11      lukem    1562: history_total_bytes(void)
1.1       christos 1563: {
1.92      christos 1564:        HistEvent ev;
1.80      christos 1565:        int curr_num;
                   1566:        size_t size;
1.1       christos 1567:
1.92      christos 1568:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1569:                return -1;
1.1       christos 1570:        curr_num = ev.num;
                   1571:
1.92      christos 1572:        (void)history(h, &ev, H_FIRST);
1.1       christos 1573:        size = 0;
                   1574:        do
1.92      christos 1575:                size += strlen(ev.str) * sizeof(*ev.str);
                   1576:        while (history(h, &ev, H_NEXT) == 0);
1.1       christos 1577:
                   1578:        /* get to the same position as before */
1.92      christos 1579:        history(h, &ev, H_PREV_EVENT, curr_num);
1.1       christos 1580:
1.96      christos 1581:        return (int)size;
1.1       christos 1582: }
                   1583:
1.11      lukem    1584:
1.1       christos 1585: /*
                   1586:  * sets the position in the history list to ``pos''
                   1587:  */
                   1588: int
1.11      lukem    1589: history_set_pos(int pos)
1.1       christos 1590: {
1.92      christos 1591:        HistEvent ev;
1.40      christos 1592:        int curr_num;
1.1       christos 1593:
1.85      christos 1594:        if (pos >= history_length || pos < 0)
1.96      christos 1595:                return -1;
1.1       christos 1596:
1.92      christos 1597:        (void)history(h, &ev, H_CURR);
1.1       christos 1598:        curr_num = ev.num;
                   1599:
1.85      christos 1600:        /*
                   1601:         * use H_DELDATA to set to nth history (without delete) by passing
                   1602:         * (void **)-1
                   1603:         */
1.92      christos 1604:        if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
                   1605:                (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1606:                return -1;
1.1       christos 1607:        }
1.96      christos 1608:        return 0;
1.1       christos 1609: }
                   1610:
1.11      lukem    1611:
1.1       christos 1612: /*
                   1613:  * returns previous event in history and shifts pointer accordingly
                   1614:  */
1.2       christos 1615: HIST_ENTRY *
1.11      lukem    1616: previous_history(void)
1.1       christos 1617: {
1.11      lukem    1618:
1.96      christos 1619:        return _move_history(H_PREV);
1.1       christos 1620: }
                   1621:
1.11      lukem    1622:
1.1       christos 1623: /*
                   1624:  * returns next event in history and shifts pointer accordingly
                   1625:  */
1.2       christos 1626: HIST_ENTRY *
1.11      lukem    1627: next_history(void)
1.1       christos 1628: {
1.11      lukem    1629:
1.96      christos 1630:        return _move_history(H_NEXT);
1.1       christos 1631: }
                   1632:
1.11      lukem    1633:
1.1       christos 1634: /*
1.40      christos 1635:  * searches for first history event containing the str
1.1       christos 1636:  */
1.40      christos 1637: int
                   1638: history_search(const char *str, int direction)
1.11      lukem    1639: {
1.92      christos 1640:        HistEvent ev;
                   1641:        const char *strp;
1.11      lukem    1642:        int curr_num;
1.1       christos 1643:
1.92      christos 1644:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1645:                return -1;
1.1       christos 1646:        curr_num = ev.num;
                   1647:
                   1648:        for (;;) {
1.92      christos 1649:                if ((strp = strstr(ev.str, str)) != NULL)
1.96      christos 1650:                        return (int)(strp - ev.str);
1.92      christos 1651:                if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1.1       christos 1652:                        break;
                   1653:        }
1.92      christos 1654:        (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1655:        return -1;
1.1       christos 1656: }
                   1657:
1.11      lukem    1658:
1.1       christos 1659: /*
                   1660:  * searches for first history event beginning with str
                   1661:  */
                   1662: int
1.11      lukem    1663: history_search_prefix(const char *str, int direction)
1.1       christos 1664: {
1.92      christos 1665:        HistEvent ev;
1.11      lukem    1666:
1.92      christos 1667:        return (history(h, &ev, direction < 0 ?
1.88      christos 1668:            H_PREV_STR : H_NEXT_STR, str));
1.1       christos 1669: }
                   1670:
1.11      lukem    1671:
1.1       christos 1672: /*
                   1673:  * search for event in history containing str, starting at offset
                   1674:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1675:  */
1.5       christos 1676: /* ARGSUSED */
1.1       christos 1677: int
1.40      christos 1678: history_search_pos(const char *str,
1.30      christos 1679:                   int direction __attribute__((__unused__)), int pos)
1.1       christos 1680: {
1.92      christos 1681:        HistEvent ev;
1.11      lukem    1682:        int curr_num, off;
1.1       christos 1683:
                   1684:        off = (pos > 0) ? pos : -pos;
                   1685:        pos = (pos > 0) ? 1 : -1;
                   1686:
1.92      christos 1687:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1688:                return -1;
1.1       christos 1689:        curr_num = ev.num;
                   1690:
1.92      christos 1691:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1.96      christos 1692:                return -1;
1.1       christos 1693:
                   1694:        for (;;) {
1.92      christos 1695:                if (strstr(ev.str, str))
1.96      christos 1696:                        return off;
1.92      christos 1697:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1.1       christos 1698:                        break;
                   1699:        }
                   1700:
                   1701:        /* set "current" pointer back to previous state */
1.92      christos 1702:        (void)history(h, &ev,
1.88      christos 1703:            pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1.1       christos 1704:
1.96      christos 1705:        return -1;
1.1       christos 1706: }
                   1707:
                   1708:
                   1709: /********************************/
1.40      christos 1710: /* completion functions */
1.1       christos 1711:
1.57      christos 1712: char *
                   1713: tilde_expand(char *name)
                   1714: {
                   1715:        return fn_tilde_expand(name);
                   1716: }
                   1717:
                   1718: char *
                   1719: filename_completion_function(const char *name, int state)
                   1720: {
                   1721:        return fn_filename_completion_function(name, state);
                   1722: }
                   1723:
1.1       christos 1724: /*
                   1725:  * a completion generator for usernames; returns _first_ username
                   1726:  * which starts with supplied text
                   1727:  * text contains a partial username preceded by random character
1.94      christos 1728:  * (usually '~'); state resets search from start (??? should we do that anyway)
1.113     snj      1729:  * it's the caller's responsibility to free the returned value
1.1       christos 1730:  */
1.11      lukem    1731: char *
                   1732: username_completion_function(const char *text, int state)
1.1       christos 1733: {
1.94      christos 1734: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1735:        struct passwd pwres;
1.50      christos 1736:        char pwbuf[1024];
1.94      christos 1737: #endif
                   1738:        struct passwd *pass = NULL;
1.1       christos 1739:
                   1740:        if (text[0] == '\0')
1.96      christos 1741:                return NULL;
1.1       christos 1742:
                   1743:        if (*text == '~')
                   1744:                text++;
                   1745:
                   1746:        if (state == 0)
                   1747:                setpwent();
                   1748:
1.94      christos 1749:        while (
                   1750: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1751:            getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL
                   1752: #else
                   1753:            (pass = getpwent()) != NULL
                   1754: #endif
                   1755:            && text[0] == pass->pw_name[0]
                   1756:            && strcmp(text, pass->pw_name) == 0)
                   1757:                continue;
1.1       christos 1758:
1.94      christos 1759:        if (pass == NULL) {
1.1       christos 1760:                endpwent();
1.85      christos 1761:                return NULL;
1.1       christos 1762:        }
1.94      christos 1763:        return strdup(pass->pw_name);
1.1       christos 1764: }
                   1765:
1.11      lukem    1766:
1.1       christos 1767: /*
1.46      christos 1768:  * el-compatible wrapper to send TSTP on ^Z
                   1769:  */
                   1770: /* ARGSUSED */
                   1771: static unsigned char
                   1772: _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
                   1773: {
                   1774:        (void)kill(0, SIGTSTP);
                   1775:        return CC_NORM;
                   1776: }
1.11      lukem    1777:
1.1       christos 1778: /*
1.12      jdolecek 1779:  * Display list of strings in columnar format on readline's output stream.
                   1780:  * 'matches' is list of strings, 'len' is number of strings in 'matches',
                   1781:  * 'max' is maximum length of string in 'matches'.
                   1782:  */
                   1783: void
1.53      dsl      1784: rl_display_match_list(char **matches, int len, int max)
1.12      jdolecek 1785: {
                   1786:
1.81      christos 1787:        fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1.1       christos 1788: }
                   1789:
1.56      christos 1790: static const char *
                   1791: /*ARGSUSED*/
                   1792: _rl_completion_append_character_function(const char *dummy
                   1793:     __attribute__((__unused__)))
                   1794: {
                   1795:        static char buf[2];
1.99      christos 1796:        buf[0] = (char)rl_completion_append_character;
1.76      christos 1797:        buf[1] = '\0';
1.56      christos 1798:        return buf;
                   1799: }
                   1800:
1.11      lukem    1801:
1.1       christos 1802: /*
                   1803:  * complete word at current point
                   1804:  */
1.53      dsl      1805: /* ARGSUSED */
1.1       christos 1806: int
1.53      dsl      1807: rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1.1       christos 1808: {
1.86      christos 1809: #ifdef WIDECHAR
                   1810:        static ct_buffer_t wbreak_conv, sprefix_conv;
                   1811: #endif
1.102     christos 1812:        char *breakchars;
1.86      christos 1813:
1.1       christos 1814:        if (h == NULL || e == NULL)
                   1815:                rl_initialize();
                   1816:
                   1817:        if (rl_inhibit_completion) {
1.47      christos 1818:                char arr[2];
                   1819:                arr[0] = (char)invoking_key;
                   1820:                arr[1] = '\0';
                   1821:                el_insertstr(e, arr);
1.96      christos 1822:                return CC_REFRESH;
1.53      dsl      1823:        }
                   1824:
1.102     christos 1825:        if (rl_completion_word_break_hook != NULL)
                   1826:                breakchars = (*rl_completion_word_break_hook)();
                   1827:        else
                   1828:                breakchars = rl_basic_word_break_characters;
                   1829:
1.116     christos 1830:        _rl_update_pos();
                   1831:
1.53      dsl      1832:        /* Just look at how many global variables modify this operation! */
                   1833:        return fn_complete(e,
1.117     christos 1834:            (rl_compentry_func_t *)rl_completion_entry_function,
1.53      dsl      1835:            rl_attempted_completion_function,
1.86      christos 1836:            ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1.102     christos 1837:            ct_decode_string(breakchars, &sprefix_conv),
1.81      christos 1838:            _rl_completion_append_character_function,
                   1839:            (size_t)rl_completion_query_items,
1.53      dsl      1840:            &rl_completion_type, &rl_attempted_completion_over,
                   1841:            &rl_point, &rl_end);
1.92      christos 1842:
                   1843:
1.1       christos 1844: }
                   1845:
1.11      lukem    1846:
1.53      dsl      1847: /* ARGSUSED */
                   1848: static unsigned char
                   1849: _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
                   1850: {
                   1851:        return (unsigned char)rl_complete(0, ch);
                   1852: }
                   1853:
1.1       christos 1854: /*
1.7       simonb   1855:  * misc other functions
1.1       christos 1856:  */
                   1857:
                   1858: /*
                   1859:  * bind key c to readline-type function func
                   1860:  */
                   1861: int
1.85      christos 1862: rl_bind_key(int c, rl_command_func_t *func)
1.1       christos 1863: {
1.11      lukem    1864:        int retval = -1;
1.1       christos 1865:
                   1866:        if (h == NULL || e == NULL)
                   1867:                rl_initialize();
                   1868:
                   1869:        if (func == rl_insert) {
                   1870:                /* XXX notice there is no range checking of ``c'' */
                   1871:                e->el_map.key[c] = ED_INSERT;
                   1872:                retval = 0;
                   1873:        }
1.96      christos 1874:        return retval;
1.1       christos 1875: }
                   1876:
1.11      lukem    1877:
1.1       christos 1878: /*
                   1879:  * read one key from input - handles chars pushed back
                   1880:  * to input stream also
                   1881:  */
                   1882: int
1.11      lukem    1883: rl_read_key(void)
1.1       christos 1884: {
1.11      lukem    1885:        char fooarr[2 * sizeof(int)];
1.1       christos 1886:
                   1887:        if (e == NULL || h == NULL)
                   1888:                rl_initialize();
                   1889:
1.96      christos 1890:        return el_getc(e, fooarr);
1.1       christos 1891: }
                   1892:
1.11      lukem    1893:
1.1       christos 1894: /*
                   1895:  * reset the terminal
                   1896:  */
1.5       christos 1897: /* ARGSUSED */
1.1       christos 1898: void
1.30      christos 1899: rl_reset_terminal(const char *p __attribute__((__unused__)))
1.1       christos 1900: {
1.11      lukem    1901:
1.1       christos 1902:        if (h == NULL || e == NULL)
                   1903:                rl_initialize();
                   1904:        el_reset(e);
                   1905: }
                   1906:
1.11      lukem    1907:
1.1       christos 1908: /*
                   1909:  * insert character ``c'' back into input stream, ``count'' times
                   1910:  */
                   1911: int
1.11      lukem    1912: rl_insert(int count, int c)
1.1       christos 1913: {
1.11      lukem    1914:        char arr[2];
1.1       christos 1915:
                   1916:        if (h == NULL || e == NULL)
                   1917:                rl_initialize();
                   1918:
                   1919:        /* XXX - int -> char conversion can lose on multichars */
1.99      christos 1920:        arr[0] = (char)c;
1.1       christos 1921:        arr[1] = '\0';
                   1922:
                   1923:        for (; count > 0; count--)
                   1924:                el_push(e, arr);
                   1925:
1.96      christos 1926:        return 0;
1.35      christos 1927: }
                   1928:
1.85      christos 1929: int
                   1930: rl_insert_text(const char *text)
                   1931: {
                   1932:        if (!text || *text == 0)
1.96      christos 1933:                return 0;
1.85      christos 1934:
                   1935:        if (h == NULL || e == NULL)
                   1936:                rl_initialize();
                   1937:
                   1938:        if (el_insertstr(e, text) < 0)
1.96      christos 1939:                return 0;
1.85      christos 1940:        return (int)strlen(text);
                   1941: }
                   1942:
1.35      christos 1943: /*ARGSUSED*/
                   1944: int
1.97      christos 1945: rl_newline(int count __attribute__((__unused__)),
                   1946:     int c __attribute__((__unused__)))
1.35      christos 1947: {
                   1948:        /*
                   1949:         * Readline-4.0 appears to ignore the args.
                   1950:         */
                   1951:        return rl_insert(1, '\n');
                   1952: }
                   1953:
                   1954: /*ARGSUSED*/
                   1955: static unsigned char
1.97      christos 1956: rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c)
1.35      christos 1957: {
                   1958:        if (map[c] == NULL)
                   1959:            return CC_ERROR;
1.49      christos 1960:
                   1961:        _rl_update_pos();
                   1962:
1.116     christos 1963:        (*map[c])(1, c);
1.38      christos 1964:
                   1965:        /* If rl_done was set by the above call, deal with it here */
                   1966:        if (rl_done)
                   1967:                return CC_EOF;
                   1968:
1.35      christos 1969:        return CC_NORM;
                   1970: }
                   1971:
                   1972: int
1.116     christos 1973: rl_add_defun(const char *name, rl_command_func_t *fun, int c)
1.35      christos 1974: {
                   1975:        char dest[8];
1.77      lukem    1976:        if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1.35      christos 1977:                return -1;
                   1978:        map[(unsigned char)c] = fun;
                   1979:        el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1.37      christos 1980:        vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1.106     christos 1981:        el_set(e, EL_BIND, dest, name, NULL);
1.35      christos 1982:        return 0;
                   1983: }
                   1984:
                   1985: void
1.101     matt     1986: rl_callback_read_char(void)
1.35      christos 1987: {
1.36      christos 1988:        int count = 0, done = 0;
1.35      christos 1989:        const char *buf = el_gets(e, &count);
                   1990:        char *wbuf;
                   1991:
                   1992:        if (buf == NULL || count-- <= 0)
                   1993:                return;
1.61      christos 1994:        if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1.36      christos 1995:                done = 1;
                   1996:        if (buf[count] == '\n' || buf[count] == '\r')
                   1997:                done = 2;
                   1998:
                   1999:        if (done && rl_linefunc != NULL) {
1.35      christos 2000:                el_set(e, EL_UNBUFFERED, 0);
1.36      christos 2001:                if (done == 2) {
                   2002:                    if ((wbuf = strdup(buf)) != NULL)
                   2003:                        wbuf[count] = '\0';
                   2004:                } else
                   2005:                        wbuf = NULL;
1.35      christos 2006:                (*(void (*)(const char *))rl_linefunc)(wbuf);
1.111     christos 2007:                el_set(e, EL_UNBUFFERED, 1);
1.35      christos 2008:        }
                   2009: }
                   2010:
                   2011: void
1.117     christos 2012: rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc)
1.35      christos 2013: {
                   2014:        if (e == NULL) {
                   2015:                rl_initialize();
                   2016:        }
1.78      christos 2017:        (void)rl_set_prompt(prompt);
1.35      christos 2018:        rl_linefunc = linefunc;
                   2019:        el_set(e, EL_UNBUFFERED, 1);
                   2020: }
                   2021:
                   2022: void
                   2023: rl_callback_handler_remove(void)
                   2024: {
                   2025:        el_set(e, EL_UNBUFFERED, 0);
1.72      christos 2026:        rl_linefunc = NULL;
1.35      christos 2027: }
                   2028:
                   2029: void
                   2030: rl_redisplay(void)
                   2031: {
                   2032:        char a[2];
1.99      christos 2033:        a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT];
1.35      christos 2034:        a[1] = '\0';
                   2035:        el_push(e, a);
                   2036: }
                   2037:
                   2038: int
                   2039: rl_get_previous_history(int count, int key)
                   2040: {
                   2041:        char a[2];
1.99      christos 2042:        a[0] = (char)key;
1.35      christos 2043:        a[1] = '\0';
                   2044:        while (count--)
                   2045:                el_push(e, a);
                   2046:        return 0;
1.38      christos 2047: }
                   2048:
                   2049: void
                   2050: /*ARGSUSED*/
1.97      christos 2051: rl_prep_terminal(int meta_flag __attribute__((__unused__)))
1.38      christos 2052: {
                   2053:        el_set(e, EL_PREP_TERM, 1);
                   2054: }
                   2055:
                   2056: void
1.68      christos 2057: rl_deprep_terminal(void)
1.38      christos 2058: {
                   2059:        el_set(e, EL_PREP_TERM, 0);
                   2060: }
                   2061:
                   2062: int
                   2063: rl_read_init_file(const char *s)
                   2064: {
1.96      christos 2065:        return el_source(e, s);
1.38      christos 2066: }
                   2067:
                   2068: int
                   2069: rl_parse_and_bind(const char *line)
                   2070: {
                   2071:        const char **argv;
                   2072:        int argc;
                   2073:        Tokenizer *tok;
                   2074:
                   2075:        tok = tok_init(NULL);
1.44      lukem    2076:        tok_str(tok, line, &argc, &argv);
1.38      christos 2077:        argc = el_parse(e, argc, argv);
                   2078:        tok_end(tok);
1.96      christos 2079:        return argc ? 1 : 0;
1.38      christos 2080: }
                   2081:
1.51      christos 2082: int
                   2083: rl_variable_bind(const char *var, const char *value)
                   2084: {
                   2085:        /*
                   2086:         * The proper return value is undocument, but this is what the
                   2087:         * readline source seems to do.
                   2088:         */
1.106     christos 2089:        return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
1.51      christos 2090: }
                   2091:
1.38      christos 2092: void
                   2093: rl_stuff_char(int c)
                   2094: {
                   2095:        char buf[2];
                   2096:
1.99      christos 2097:        buf[0] = (char)c;
1.38      christos 2098:        buf[1] = '\0';
                   2099:        el_insertstr(e, buf);
                   2100: }
                   2101:
                   2102: static int
                   2103: _rl_event_read_char(EditLine *el, char *cp)
                   2104: {
1.80      christos 2105:        int     n;
                   2106:        ssize_t num_read = 0;
1.38      christos 2107:
1.76      christos 2108:        *cp = '\0';
1.38      christos 2109:        while (rl_event_hook) {
                   2110:
                   2111:                (*rl_event_hook)();
                   2112:
                   2113: #if defined(FIONREAD)
                   2114:                if (ioctl(el->el_infd, FIONREAD, &n) < 0)
1.96      christos 2115:                        return -1;
1.38      christos 2116:                if (n)
1.98      christos 2117:                        num_read = read(el->el_infd, cp, (size_t)1);
1.38      christos 2118:                else
                   2119:                        num_read = 0;
                   2120: #elif defined(F_SETFL) && defined(O_NDELAY)
                   2121:                if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
1.96      christos 2122:                        return -1;
1.38      christos 2123:                if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
1.96      christos 2124:                        return -1;
1.38      christos 2125:                num_read = read(el->el_infd, cp, 1);
                   2126:                if (fcntl(el->el_infd, F_SETFL, n))
1.96      christos 2127:                        return -1;
1.38      christos 2128: #else
                   2129:                /* not non-blocking, but what you gonna do? */
                   2130:                num_read = read(el->el_infd, cp, 1);
1.96      christos 2131:                return -1;
1.38      christos 2132: #endif
                   2133:
                   2134:                if (num_read < 0 && errno == EAGAIN)
                   2135:                        continue;
                   2136:                if (num_read == 0)
                   2137:                        continue;
                   2138:                break;
                   2139:        }
                   2140:        if (!rl_event_hook)
                   2141:                el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
1.80      christos 2142:        return (int)num_read;
1.1       christos 2143: }
1.49      christos 2144:
                   2145: static void
                   2146: _rl_update_pos(void)
                   2147: {
                   2148:        const LineInfo *li = el_line(e);
                   2149:
1.80      christos 2150:        rl_point = (int)(li->cursor - li->buffer);
                   2151:        rl_end = (int)(li->lastchar - li->buffer);
1.49      christos 2152: }
1.70      christos 2153:
                   2154: void
                   2155: rl_get_screen_size(int *rows, int *cols)
                   2156: {
                   2157:        if (rows)
1.107     christos 2158:                el_get(e, EL_GETTC, "li", rows, (void *)0);
1.70      christos 2159:        if (cols)
1.107     christos 2160:                el_get(e, EL_GETTC, "co", cols, (void *)0);
1.70      christos 2161: }
                   2162:
                   2163: void
                   2164: rl_set_screen_size(int rows, int cols)
                   2165: {
                   2166:        char buf[64];
                   2167:        (void)snprintf(buf, sizeof(buf), "%d", rows);
1.106     christos 2168:        el_set(e, EL_SETTC, "li", buf, NULL);
1.70      christos 2169:        (void)snprintf(buf, sizeof(buf), "%d", cols);
1.106     christos 2170:        el_set(e, EL_SETTC, "co", buf, NULL);
1.70      christos 2171: }
                   2172:
1.71      christos 2173: char **
                   2174: rl_completion_matches(const char *str, rl_compentry_func_t *fun)
                   2175: {
                   2176:        size_t len, max, i, j, min;
                   2177:        char **list, *match, *a, *b;
                   2178:
                   2179:        len = 1;
                   2180:        max = 10;
1.95      christos 2181:        if ((list = el_malloc(max * sizeof(*list))) == NULL)
1.71      christos 2182:                return NULL;
                   2183:
                   2184:        while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
1.83      christos 2185:                list[len++] = match;
1.71      christos 2186:                if (len == max) {
                   2187:                        char **nl;
                   2188:                        max += 10;
1.95      christos 2189:                        if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL)
1.71      christos 2190:                                goto out;
                   2191:                        list = nl;
                   2192:                }
                   2193:        }
                   2194:        if (len == 1)
                   2195:                goto out;
                   2196:        list[len] = NULL;
                   2197:        if (len == 2) {
                   2198:                if ((list[0] = strdup(list[1])) == NULL)
                   2199:                        goto out;
                   2200:                return list;
                   2201:        }
                   2202:        qsort(&list[1], len - 1, sizeof(*list),
                   2203:            (int (*)(const void *, const void *)) strcmp);
1.119     christos 2204:        min = SIZE_MAX;
1.71      christos 2205:        for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
                   2206:                b = list[i + 1];
                   2207:                for (j = 0; a[j] && a[j] == b[j]; j++)
                   2208:                        continue;
                   2209:                if (min > j)
                   2210:                        min = j;
                   2211:        }
                   2212:        if (min == 0 && *str) {
                   2213:                if ((list[0] = strdup(str)) == NULL)
                   2214:                        goto out;
                   2215:        } else {
1.95      christos 2216:                if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL)
1.71      christos 2217:                        goto out;
                   2218:                (void)memcpy(list[0], list[1], min);
                   2219:                list[0][min] = '\0';
                   2220:        }
                   2221:        return list;
                   2222:
                   2223: out:
1.95      christos 2224:        el_free(list);
1.71      christos 2225:        return NULL;
                   2226: }
                   2227:
1.70      christos 2228: char *
                   2229: rl_filename_completion_function (const char *text, int state)
                   2230: {
                   2231:        return fn_filename_completion_function(text, state);
                   2232: }
                   2233:
1.73      christos 2234: void
                   2235: rl_forced_update_display(void)
                   2236: {
1.74      christos 2237:        el_set(e, EL_REFRESH);
1.73      christos 2238: }
                   2239:
1.70      christos 2240: int
                   2241: _rl_abort_internal(void)
                   2242: {
                   2243:        el_beep(e);
                   2244:        longjmp(topbuf, 1);
                   2245:        /*NOTREACHED*/
                   2246: }
                   2247:
                   2248: int
                   2249: _rl_qsort_string_compare(char **s1, char **s2)
                   2250: {
                   2251:        return strcoll(*s1, *s2);
                   2252: }
                   2253:
1.85      christos 2254: HISTORY_STATE *
                   2255: history_get_history_state(void)
                   2256: {
                   2257:        HISTORY_STATE *hs;
                   2258:
1.95      christos 2259:        if ((hs = el_malloc(sizeof(*hs))) == NULL)
1.96      christos 2260:                return NULL;
1.85      christos 2261:        hs->length = history_length;
1.96      christos 2262:        return hs;
1.85      christos 2263: }
                   2264:
1.70      christos 2265: int
                   2266: /*ARGSUSED*/
1.97      christos 2267: rl_kill_text(int from __attribute__((__unused__)),
                   2268:     int to __attribute__((__unused__)))
1.70      christos 2269: {
                   2270:        return 0;
                   2271: }
                   2272:
                   2273: Keymap
                   2274: rl_make_bare_keymap(void)
                   2275: {
                   2276:        return NULL;
                   2277: }
                   2278:
                   2279: Keymap
                   2280: rl_get_keymap(void)
                   2281: {
                   2282:        return NULL;
                   2283: }
                   2284:
                   2285: void
                   2286: /*ARGSUSED*/
1.97      christos 2287: rl_set_keymap(Keymap k __attribute__((__unused__)))
1.70      christos 2288: {
                   2289: }
                   2290:
                   2291: int
                   2292: /*ARGSUSED*/
1.97      christos 2293: rl_generic_bind(int type __attribute__((__unused__)),
                   2294:     const char * keyseq __attribute__((__unused__)),
                   2295:     const char * data __attribute__((__unused__)),
                   2296:     Keymap k __attribute__((__unused__)))
1.70      christos 2297: {
                   2298:        return 0;
                   2299: }
                   2300:
                   2301: int
                   2302: /*ARGSUSED*/
1.97      christos 2303: rl_bind_key_in_map(int key __attribute__((__unused__)),
                   2304:     rl_command_func_t *fun __attribute__((__unused__)),
                   2305:     Keymap k __attribute__((__unused__)))
1.70      christos 2306: {
                   2307:        return 0;
                   2308: }
1.85      christos 2309:
                   2310: /* unsupported, but needed by python */
                   2311: void
                   2312: rl_cleanup_after_signal(void)
                   2313: {
                   2314: }
1.90      christos 2315:
                   2316: int
                   2317: rl_on_new_line(void)
                   2318: {
                   2319:        return 0;
                   2320: }
1.105     christos 2321:
                   2322: void
                   2323: rl_free_line_state(void)
                   2324: {
                   2325: }
1.118     christos 2326:
                   2327: int
                   2328: /*ARGSUSED*/
1.120     christos 2329: rl_set_keyboard_input_timeout(int u __attribute__((__unused__)))
1.118     christos 2330: {
                   2331:        return 0;
                   2332: }

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