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Annotation of src/lib/libedit/readline.c, Revision 1.125

1.125   ! christos    1: /*     $NetBSD: readline.c,v 1.124 2016/02/16 19:08:41 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)
1.125   ! christos   34: __RCSID("$NetBSD: readline.c,v 1.124 2016/02/16 19:08:41 christos Exp $");
1.1       christos   35: #endif /* not lint && not SCCSID */
                     36:
                     37: #include <sys/types.h>
                     38: #include <sys/stat.h>
1.125   ! christos   39: #include <ctype.h>
1.1       christos   40: #include <dirent.h>
1.125   ! christos   41: #include <errno.h>
        !            42: #include <fcntl.h>
        !            43: #include <limits.h>
1.1       christos   44: #include <pwd.h>
1.125   ! christos   45: #include <setjmp.h>
        !            46: #include <stdint.h>
        !            47: #include <stdio.h>
1.1       christos   48: #include <stdlib.h>
1.125   ! christos   49: #include <string.h>
1.1       christos   50: #include <unistd.h>
1.35      christos   51: #include <vis.h>
1.97      christos   52:
1.79      sketch     53: #include "readline/readline.h"
1.45      christos   54: #include "el.h"
1.53      dsl        55: #include "filecomplete.h"
1.1       christos   56:
1.68      christos   57: void rl_prep_terminal(int);
                     58: void rl_deprep_terminal(void);
                     59:
1.1       christos   60: /* for rl_complete() */
1.40      christos   61: #define TAB            '\r'
1.1       christos   62:
                     63: /* see comment at the #ifdef for sense of this */
1.40      christos   64: /* #define GDB_411_HACK */
1.1       christos   65:
                     66: /* readline compatibility stuff - look at readline sources/documentation */
                     67: /* to see what these variables mean */
1.11      lukem      68: const char *rl_library_version = "EditLine wrapper";
1.85      christos   69: int rl_readline_version = RL_READLINE_VERSION;
1.20      christos   70: static char empty[] = { '\0' };
                     71: static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
                     72: static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
                     73:     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
                     74: char *rl_readline_name = empty;
1.11      lukem      75: FILE *rl_instream = NULL;
                     76: FILE *rl_outstream = NULL;
                     77: int rl_point = 0;
                     78: int rl_end = 0;
                     79: char *rl_line_buffer = NULL;
1.117     christos   80: rl_vcpfunc_t *rl_linefunc = NULL;
1.38      christos   81: int rl_done = 0;
                     82: VFunction *rl_event_hook = NULL;
1.70      christos   83: KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
                     84:     emacs_meta_keymap,
                     85:     emacs_ctlx_keymap;
1.108     christos   86: /*
                     87:  * The following is not implemented; we always catch signals in the
                     88:  * libedit fashion: set handlers on entry to el_gets() and clear them
                     89:  * on the way out. This simplistic approach works for most cases; if
                     90:  * it does not work for your application, please let us know.
                     91:  */
                     92: int rl_catch_signals = 1;
                     93: int rl_catch_sigwinch = 1;
1.11      lukem      94:
                     95: int history_base = 1;          /* probably never subject to change */
                     96: int history_length = 0;
                     97: int max_input_history = 0;
                     98: char history_expansion_char = '!';
                     99: char history_subst_char = '^';
1.20      christos  100: char *history_no_expand_chars = expand_chars;
1.11      lukem     101: Function *history_inhibit_expansion_function = NULL;
1.40      christos  102: char *history_arg_extract(int start, int end, const char *str);
1.11      lukem     103:
                    104: int rl_inhibit_completion = 0;
                    105: int rl_attempted_completion_over = 0;
1.20      christos  106: char *rl_basic_word_break_characters = break_chars;
1.11      lukem     107: char *rl_completer_word_break_characters = NULL;
                    108: char *rl_completer_quote_characters = NULL;
1.117     christos  109: rl_compentry_func_t *rl_completion_entry_function = NULL;
1.103     christos  110: char *(*rl_completion_word_break_hook)(void) = NULL;
1.117     christos  111: rl_completion_func_t *rl_attempted_completion_function = NULL;
1.32      christos  112: Function *rl_pre_input_hook = NULL;
                    113: Function *rl_startup1_hook = NULL;
1.72      christos  114: int (*rl_getc_function)(FILE *) = NULL;
1.32      christos  115: char *rl_terminal_name = NULL;
                    116: int rl_already_prompted = 0;
                    117: int rl_filename_completion_desired = 0;
                    118: int rl_ignore_completion_duplicates = 0;
1.70      christos  119: int readline_echoing_p = 1;
                    120: int _rl_print_completions_horizontally = 0;
1.32      christos  121: VFunction *rl_redisplay_function = NULL;
1.33      christos  122: Function *rl_startup_hook = NULL;
1.34      christos  123: VFunction *rl_completion_display_matches_hook = NULL;
1.68      christos  124: VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
                    125: VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
1.85      christos  126: KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
1.1       christos  127:
1.12      jdolecek  128: /*
1.32      christos  129:  * The current prompt string.
                    130:  */
                    131: char *rl_prompt = NULL;
                    132: /*
1.12      jdolecek  133:  * This is set to character indicating type of completion being done by
                    134:  * rl_complete_internal(); this is available for application completion
                    135:  * functions.
                    136:  */
                    137: int rl_completion_type = 0;
                    138:
                    139: /*
                    140:  * If more than this number of items results from query for possible
                    141:  * completions, we ask user if they are sure to really display the list.
                    142:  */
                    143: int rl_completion_query_items = 100;
                    144:
                    145: /*
1.15      jdolecek  146:  * List of characters which are word break characters, but should be left
                    147:  * in the parsed text when it is passed to the completion function.
                    148:  * Shell uses this to help determine what kind of completing to do.
1.12      jdolecek  149:  */
1.53      dsl       150: char *rl_special_prefixes = NULL;
1.15      jdolecek  151:
                    152: /*
                    153:  * This is the character appended to the completed words if at the end of
                    154:  * the line. Default is ' ' (a space).
                    155:  */
                    156: int rl_completion_append_character = ' ';
                    157:
                    158: /* stuff below is used internally by libedit for readline emulation */
                    159:
1.92      christos  160: static History *h = NULL;
1.1       christos  161: static EditLine *e = NULL;
1.116     christos  162: static rl_command_func_t *map[256];
1.70      christos  163: static jmp_buf topbuf;
1.1       christos  164:
                    165: /* internal functions */
1.11      lukem     166: static unsigned char    _el_rl_complete(EditLine *, int);
1.46      christos  167: static unsigned char    _el_rl_tstp(EditLine *, int);
1.11      lukem     168: static char            *_get_prompt(EditLine *);
1.59      christos  169: static int              _getc_function(EditLine *, char *);
1.11      lukem     170: static HIST_ENTRY      *_move_history(int);
1.40      christos  171: static int              _history_expand_command(const char *, size_t, size_t,
                    172:     char **);
1.11      lukem     173: static char            *_rl_compat_sub(const char *, const char *,
1.40      christos  174:     const char *, int);
1.38      christos  175: static int              _rl_event_read_char(EditLine *, char *);
1.49      christos  176: static void             _rl_update_pos(void);
1.1       christos  177:
1.5       christos  178:
                    179: /* ARGSUSED */
1.1       christos  180: static char *
1.30      christos  181: _get_prompt(EditLine *el __attribute__((__unused__)))
1.1       christos  182: {
1.32      christos  183:        rl_already_prompted = 1;
1.96      christos  184:        return rl_prompt;
1.1       christos  185: }
                    186:
1.11      lukem     187:
1.1       christos  188: /*
                    189:  * generic function for moving around history
                    190:  */
1.2       christos  191: static HIST_ENTRY *
1.11      lukem     192: _move_history(int op)
1.1       christos  193: {
1.92      christos  194:        HistEvent ev;
1.1       christos  195:        static HIST_ENTRY rl_he;
                    196:
1.92      christos  197:        if (history(h, &ev, op) != 0)
1.96      christos  198:                return NULL;
1.1       christos  199:
1.92      christos  200:        rl_he.line = ev.str;
1.40      christos  201:        rl_he.data = NULL;
1.1       christos  202:
1.96      christos  203:        return &rl_he;
1.1       christos  204: }
                    205:
                    206:
1.7       simonb    207: /*
1.59      christos  208:  * read one key from user defined input function
                    209:  */
                    210: static int
1.61      christos  211: /*ARGSUSED*/
1.97      christos  212: _getc_function(EditLine *el __attribute__((__unused__)), char *c)
1.59      christos  213: {
                    214:        int i;
                    215:
1.72      christos  216:        i = (*rl_getc_function)(NULL);
1.59      christos  217:        if (i == -1)
                    218:                return 0;
1.99      christos  219:        *c = (char)i;
1.59      christos  220:        return 1;
                    221: }
                    222:
1.91      christos  223: static void
                    224: _resize_fun(EditLine *el, void *a)
                    225: {
                    226:        const LineInfo *li;
                    227:        char **ap = a;
                    228:
                    229:        li = el_line(el);
                    230:        /* a cheesy way to get rid of const cast. */
1.98      christos  231:        *ap = memchr(li->buffer, *li->buffer, (size_t)1);
1.91      christos  232: }
                    233:
1.85      christos  234: static const char *
                    235: _default_history_file(void)
                    236: {
                    237:        struct passwd *p;
1.109     christos  238:        static char *path;
                    239:        size_t len;
1.85      christos  240:
1.109     christos  241:        if (path)
1.85      christos  242:                return path;
1.109     christos  243:
1.85      christos  244:        if ((p = getpwuid(getuid())) == NULL)
                    245:                return NULL;
1.109     christos  246:
                    247:        len = strlen(p->pw_dir) + sizeof("/.history");
                    248:        if ((path = malloc(len)) == NULL)
                    249:                return NULL;
                    250:
                    251:        (void)snprintf(path, len, "%s/.history", p->pw_dir);
1.85      christos  252:        return path;
                    253: }
1.59      christos  254:
                    255: /*
1.7       simonb    256:  * READLINE compatibility stuff
1.1       christos  257:  */
                    258:
                    259: /*
1.78      christos  260:  * Set the prompt
                    261:  */
                    262: int
                    263: rl_set_prompt(const char *prompt)
                    264: {
1.82      christos  265:        char *p;
                    266:
1.78      christos  267:        if (!prompt)
                    268:                prompt = "";
1.125   ! christos  269:        if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
1.78      christos  270:                return 0;
                    271:        if (rl_prompt)
1.95      christos  272:                el_free(rl_prompt);
1.78      christos  273:        rl_prompt = strdup(prompt);
1.82      christos  274:        if (rl_prompt == NULL)
                    275:                return -1;
                    276:
                    277:        while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
                    278:                *p = RL_PROMPT_START_IGNORE;
                    279:
                    280:        return 0;
1.78      christos  281: }
                    282:
                    283: /*
1.1       christos  284:  * initialize rl compat stuff
                    285:  */
                    286: int
1.11      lukem     287: rl_initialize(void)
1.1       christos  288: {
1.92      christos  289:        HistEvent ev;
1.18      christos  290:        int editmode = 1;
                    291:        struct termios t;
1.1       christos  292:
                    293:        if (e != NULL)
                    294:                el_end(e);
                    295:        if (h != NULL)
1.92      christos  296:                history_end(h);
1.1       christos  297:
                    298:        if (!rl_instream)
                    299:                rl_instream = stdin;
                    300:        if (!rl_outstream)
                    301:                rl_outstream = stdout;
1.18      christos  302:
                    303:        /*
                    304:         * See if we don't really want to run the editor
                    305:         */
                    306:        if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
                    307:                editmode = 0;
                    308:
1.4       christos  309:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.18      christos  310:
                    311:        if (!editmode)
1.92      christos  312:                el_set(e, EL_EDITMODE, 0);
1.1       christos  313:
1.92      christos  314:        h = history_init();
1.1       christos  315:        if (!e || !h)
1.96      christos  316:                return -1;
1.1       christos  317:
1.92      christos  318:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  319:        history_length = 0;
                    320:        max_input_history = INT_MAX;
                    321:        el_set(e, EL_HIST, history, h);
                    322:
1.91      christos  323:        /* Setup resize function */
                    324:        el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
                    325:
1.59      christos  326:        /* setup getc function if valid */
                    327:        if (rl_getc_function)
                    328:                el_set(e, EL_GETCFN, _getc_function);
                    329:
1.1       christos  330:        /* for proper prompt printing in readline() */
1.78      christos  331:        if (rl_set_prompt("") == -1) {
1.92      christos  332:                history_end(h);
1.23      christos  333:                el_end(e);
                    334:                return -1;
                    335:        }
1.82      christos  336:        el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
1.39      christos  337:        el_set(e, EL_SIGNAL, rl_catch_signals);
1.1       christos  338:
                    339:        /* set default mode to "emacs"-style and read setting afterwards */
1.112     christos  340:        /* so this can be overridden */
1.1       christos  341:        el_set(e, EL_EDITOR, "emacs");
1.32      christos  342:        if (rl_terminal_name != NULL)
                    343:                el_set(e, EL_TERMINAL, rl_terminal_name);
                    344:        else
                    345:                el_get(e, EL_TERMINAL, &rl_terminal_name);
1.1       christos  346:
1.12      jdolecek  347:        /*
1.35      christos  348:         * Word completion - this has to go AFTER rebinding keys
1.12      jdolecek  349:         * to emacs-style.
                    350:         */
1.1       christos  351:        el_set(e, EL_ADDFN, "rl_complete",
1.35      christos  352:            "ReadLine compatible completion function",
1.11      lukem     353:            _el_rl_complete);
1.1       christos  354:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
1.46      christos  355:
                    356:        /*
                    357:         * Send TSTP when ^Z is pressed.
                    358:         */
                    359:        el_set(e, EL_ADDFN, "rl_tstp",
                    360:            "ReadLine compatible suspend function",
                    361:            _el_rl_tstp);
                    362:        el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
1.125   ! christos  363:
1.114     christos  364:        /*
                    365:         * Set some readline compatible key-bindings.
                    366:         */
                    367:        el_set(e, EL_BIND, "^R", "em-inc-search-prev", NULL);
                    368:
                    369:        /*
                    370:         * Allow the use of Home/End keys.
                    371:         */
                    372:        el_set(e, EL_BIND, "\\e[1~", "ed-move-to-beg", NULL);
                    373:        el_set(e, EL_BIND, "\\e[4~", "ed-move-to-end", NULL);
                    374:        el_set(e, EL_BIND, "\\e[7~", "ed-move-to-beg", NULL);
                    375:        el_set(e, EL_BIND, "\\e[8~", "ed-move-to-end", NULL);
                    376:        el_set(e, EL_BIND, "\\e[H", "ed-move-to-beg", NULL);
                    377:        el_set(e, EL_BIND, "\\e[F", "ed-move-to-end", NULL);
                    378:
                    379:        /*
                    380:         * Allow the use of the Delete/Insert keys.
                    381:         */
                    382:        el_set(e, EL_BIND, "\\e[3~", "ed-delete-next-char", NULL);
                    383:        el_set(e, EL_BIND, "\\e[2~", "ed-quoted-insert", NULL);
                    384:
                    385:        /*
                    386:         * Ctrl-left-arrow and Ctrl-right-arrow for word moving.
                    387:         */
                    388:        el_set(e, EL_BIND, "\\e[1;5C", "em-next-word", NULL);
                    389:        el_set(e, EL_BIND, "\\e[1;5D", "ed-prev-word", NULL);
                    390:        el_set(e, EL_BIND, "\\e[5C", "em-next-word", NULL);
                    391:        el_set(e, EL_BIND, "\\e[5D", "ed-prev-word", NULL);
                    392:        el_set(e, EL_BIND, "\\e\\e[C", "em-next-word", NULL);
                    393:        el_set(e, EL_BIND, "\\e\\e[D", "ed-prev-word", NULL);
                    394:
1.1       christos  395:        /* read settings from configuration file */
                    396:        el_source(e, NULL);
                    397:
1.12      jdolecek  398:        /*
                    399:         * Unfortunately, some applications really do use rl_point
                    400:         * and rl_line_buffer directly.
                    401:         */
1.91      christos  402:        _resize_fun(e, &rl_line_buffer);
1.49      christos  403:        _rl_update_pos();
1.1       christos  404:
1.32      christos  405:        if (rl_startup_hook)
                    406:                (*rl_startup_hook)(NULL, 0);
                    407:
1.96      christos  408:        return 0;
1.1       christos  409: }
                    410:
1.11      lukem     411:
1.1       christos  412: /*
                    413:  * read one line from input stream and return it, chomping
                    414:  * trailing newline (if there is any)
                    415:  */
                    416: char *
1.70      christos  417: readline(const char *p)
1.1       christos  418: {
1.92      christos  419:        HistEvent ev;
1.70      christos  420:        const char * volatile prompt = p;
1.3       thorpej   421:        int count;
1.1       christos  422:        const char *ret;
1.20      christos  423:        char *buf;
1.38      christos  424:        static int used_event_hook;
1.1       christos  425:
                    426:        if (e == NULL || h == NULL)
                    427:                rl_initialize();
                    428:
1.38      christos  429:        rl_done = 0;
                    430:
1.70      christos  431:        (void)setjmp(topbuf);
                    432:
1.9       jdolecek  433:        /* update prompt accordingly to what has been passed */
1.78      christos  434:        if (rl_set_prompt(prompt) == -1)
                    435:                return NULL;
1.32      christos  436:
                    437:        if (rl_pre_input_hook)
                    438:                (*rl_pre_input_hook)(NULL, 0);
                    439:
1.38      christos  440:        if (rl_event_hook && !(e->el_flags&NO_TTY)) {
                    441:                el_set(e, EL_GETCFN, _rl_event_read_char);
                    442:                used_event_hook = 1;
                    443:        }
                    444:
                    445:        if (!rl_event_hook && used_event_hook) {
                    446:                el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
                    447:                used_event_hook = 0;
                    448:        }
                    449:
1.32      christos  450:        rl_already_prompted = 0;
                    451:
1.1       christos  452:        /* get one line from input stream */
                    453:        ret = el_gets(e, &count);
                    454:
                    455:        if (ret && count > 0) {
1.5       christos  456:                int lastidx;
1.1       christos  457:
1.20      christos  458:                buf = strdup(ret);
1.23      christos  459:                if (buf == NULL)
                    460:                        return NULL;
1.1       christos  461:                lastidx = count - 1;
1.20      christos  462:                if (buf[lastidx] == '\n')
                    463:                        buf[lastidx] = '\0';
1.1       christos  464:        } else
1.20      christos  465:                buf = NULL;
1.1       christos  466:
1.92      christos  467:        history(h, &ev, H_GETSIZE);
1.1       christos  468:        history_length = ev.num;
                    469:
1.20      christos  470:        return buf;
1.1       christos  471: }
                    472:
                    473: /*
                    474:  * history functions
                    475:  */
                    476:
                    477: /*
                    478:  * is normally called before application starts to use
                    479:  * history expansion functions
                    480:  */
                    481: void
1.11      lukem     482: using_history(void)
1.1       christos  483: {
                    484:        if (h == NULL || e == NULL)
                    485:                rl_initialize();
                    486: }
                    487:
1.11      lukem     488:
1.1       christos  489: /*
                    490:  * substitute ``what'' with ``with'', returning resulting string; if
1.29      wiz       491:  * globally == 1, substitutes all occurrences of what, otherwise only the
1.1       christos  492:  * first one
                    493:  */
1.11      lukem     494: static char *
                    495: _rl_compat_sub(const char *str, const char *what, const char *with,
                    496:     int globally)
                    497: {
1.40      christos  498:        const   char    *s;
                    499:        char    *r, *result;
                    500:        size_t  len, with_len, what_len;
1.1       christos  501:
1.40      christos  502:        len = strlen(str);
                    503:        with_len = strlen(with);
                    504:        what_len = strlen(what);
                    505:
                    506:        /* calculate length we need for result */
                    507:        s = str;
                    508:        while (*s) {
                    509:                if (*s == *what && !strncmp(s, what, what_len)) {
                    510:                        len += with_len - what_len;
                    511:                        if (!globally)
                    512:                                break;
                    513:                        s += what_len;
                    514:                } else
                    515:                        s++;
                    516:        }
1.95      christos  517:        r = result = el_malloc((len + 1) * sizeof(*r));
1.23      christos  518:        if (result == NULL)
                    519:                return NULL;
1.40      christos  520:        s = str;
                    521:        while (*s) {
                    522:                if (*s == *what && !strncmp(s, what, what_len)) {
                    523:                        (void)strncpy(r, with, with_len);
                    524:                        r += with_len;
                    525:                        s += what_len;
                    526:                        if (!globally) {
                    527:                                (void)strcpy(r, s);
1.96      christos  528:                                return result;
1.1       christos  529:                        }
1.40      christos  530:                } else
                    531:                        *r++ = *s++;
                    532:        }
1.76      christos  533:        *r = '\0';
1.96      christos  534:        return result;
1.40      christos  535: }
                    536:
                    537: static char    *last_search_pat;       /* last !?pat[?] search pattern */
                    538: static char    *last_search_match;     /* last !?pat[?] that matched */
                    539:
                    540: const char *
                    541: get_history_event(const char *cmd, int *cindex, int qchar)
                    542: {
                    543:        int idx, sign, sub, num, begin, ret;
                    544:        size_t len;
                    545:        char    *pat;
                    546:        const char *rptr;
1.92      christos  547:        HistEvent ev;
1.40      christos  548:
                    549:        idx = *cindex;
                    550:        if (cmd[idx++] != history_expansion_char)
1.96      christos  551:                return NULL;
1.40      christos  552:
                    553:        /* find out which event to take */
1.76      christos  554:        if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
1.92      christos  555:                if (history(h, &ev, H_FIRST) != 0)
1.96      christos  556:                        return NULL;
1.40      christos  557:                *cindex = cmd[idx]? (idx + 1):idx;
1.92      christos  558:                return ev.str;
1.40      christos  559:        }
                    560:        sign = 0;
                    561:        if (cmd[idx] == '-') {
                    562:                sign = 1;
                    563:                idx++;
                    564:        }
                    565:
                    566:        if ('0' <= cmd[idx] && cmd[idx] <= '9') {
                    567:                HIST_ENTRY *rl_he;
                    568:
                    569:                num = 0;
                    570:                while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
                    571:                        num = num * 10 + cmd[idx] - '0';
                    572:                        idx++;
                    573:                }
                    574:                if (sign)
                    575:                        num = history_length - num + 1;
                    576:
                    577:                if (!(rl_he = history_get(num)))
1.96      christos  578:                        return NULL;
1.40      christos  579:
                    580:                *cindex = idx;
1.96      christos  581:                return rl_he->line;
1.40      christos  582:        }
                    583:        sub = 0;
                    584:        if (cmd[idx] == '?') {
                    585:                sub = 1;
                    586:                idx++;
                    587:        }
                    588:        begin = idx;
                    589:        while (cmd[idx]) {
                    590:                if (cmd[idx] == '\n')
                    591:                        break;
                    592:                if (sub && cmd[idx] == '?')
                    593:                        break;
                    594:                if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
                    595:                                    || cmd[idx] == '\t' || cmd[idx] == qchar))
                    596:                        break;
                    597:                idx++;
                    598:        }
1.99      christos  599:        len = (size_t)idx - (size_t)begin;
1.40      christos  600:        if (sub && cmd[idx] == '?')
                    601:                idx++;
                    602:        if (sub && len == 0 && last_search_pat && *last_search_pat)
                    603:                pat = last_search_pat;
                    604:        else if (len == 0)
1.96      christos  605:                return NULL;
1.40      christos  606:        else {
1.95      christos  607:                if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL)
1.40      christos  608:                        return NULL;
                    609:                (void)strncpy(pat, cmd + begin, len);
                    610:                pat[len] = '\0';
                    611:        }
                    612:
1.92      christos  613:        if (history(h, &ev, H_CURR) != 0) {
1.40      christos  614:                if (pat != last_search_pat)
1.95      christos  615:                        el_free(pat);
1.96      christos  616:                return NULL;
1.40      christos  617:        }
                    618:        num = ev.num;
                    619:
                    620:        if (sub) {
                    621:                if (pat != last_search_pat) {
                    622:                        if (last_search_pat)
1.95      christos  623:                                el_free(last_search_pat);
1.40      christos  624:                        last_search_pat = pat;
1.1       christos  625:                }
1.40      christos  626:                ret = history_search(pat, -1);
                    627:        } else
                    628:                ret = history_search_prefix(pat, -1);
                    629:
                    630:        if (ret == -1) {
                    631:                /* restore to end of list on failed search */
1.92      christos  632:                history(h, &ev, H_FIRST);
1.40      christos  633:                (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
                    634:                if (pat != last_search_pat)
1.95      christos  635:                        el_free(pat);
1.96      christos  636:                return NULL;
1.40      christos  637:        }
                    638:
                    639:        if (sub && len) {
                    640:                if (last_search_match && last_search_match != pat)
1.95      christos  641:                        el_free(last_search_match);
1.40      christos  642:                last_search_match = pat;
                    643:        }
                    644:
                    645:        if (pat != last_search_pat)
1.95      christos  646:                el_free(pat);
1.40      christos  647:
1.92      christos  648:        if (history(h, &ev, H_CURR) != 0)
1.96      christos  649:                return NULL;
1.40      christos  650:        *cindex = idx;
1.92      christos  651:        rptr = ev.str;
1.40      christos  652:
                    653:        /* roll back to original position */
1.92      christos  654:        (void)history(h, &ev, H_SET, num);
1.1       christos  655:
1.40      christos  656:        return rptr;
1.1       christos  657: }
                    658:
                    659: /*
                    660:  * the real function doing history expansion - takes as argument command
                    661:  * to do and data upon which the command should be executed
                    662:  * does expansion the way I've understood readline documentation
                    663:  *
                    664:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    665:  * should be only printed and not executed; in case of error,
                    666:  * returns -1 and *result points to NULL
1.113     snj       667:  * it's the caller's responsibility to free() the string returned in *result
1.1       christos  668:  */
                    669: static int
1.40      christos  670: _history_expand_command(const char *command, size_t offs, size_t cmdlen,
                    671:     char **result)
1.11      lukem     672: {
1.40      christos  673:        char *tmp, *search = NULL, *aptr;
                    674:        const char *ptr, *cmd;
1.11      lukem     675:        static char *from = NULL, *to = NULL;
1.40      christos  676:        int start, end, idx, has_mods = 0;
                    677:        int p_on = 0, g_on = 0;
1.1       christos  678:
                    679:        *result = NULL;
1.40      christos  680:        aptr = NULL;
1.41      christos  681:        ptr = NULL;
1.1       christos  682:
1.40      christos  683:        /* First get event specifier */
                    684:        idx = 0;
1.1       christos  685:
1.40      christos  686:        if (strchr(":^*$", command[offs + 1])) {
                    687:                char str[4];
                    688:                /*
                    689:                * "!:" is shorthand for "!!:".
                    690:                * "!^", "!*" and "!$" are shorthand for
                    691:                * "!!:^", "!!:*" and "!!:$" respectively.
                    692:                */
                    693:                str[0] = str[1] = '!';
                    694:                str[2] = '0';
                    695:                ptr = get_history_event(str, &idx, 0);
                    696:                idx = (command[offs + 1] == ':')? 1:0;
                    697:                has_mods = 1;
1.1       christos  698:        } else {
1.40      christos  699:                if (command[offs + 1] == '#') {
                    700:                        /* use command so far */
1.95      christos  701:                        if ((aptr = el_malloc((offs + 1) * sizeof(*aptr)))
                    702:                            == NULL)
1.40      christos  703:                                return -1;
                    704:                        (void)strncpy(aptr, command, offs);
                    705:                        aptr[offs] = '\0';
                    706:                        idx = 1;
1.1       christos  707:                } else {
1.40      christos  708:                        int     qchar;
                    709:
                    710:                        qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
                    711:                        ptr = get_history_event(command + offs, &idx, qchar);
                    712:                }
1.99      christos  713:                has_mods = command[offs + (size_t)idx] == ':';
1.40      christos  714:        }
1.1       christos  715:
1.40      christos  716:        if (ptr == NULL && aptr == NULL)
1.96      christos  717:                return -1;
1.1       christos  718:
1.40      christos  719:        if (!has_mods) {
1.85      christos  720:                *result = strdup(aptr ? aptr : ptr);
1.40      christos  721:                if (aptr)
1.95      christos  722:                        el_free(aptr);
1.85      christos  723:                if (*result == NULL)
                    724:                        return -1;
1.96      christos  725:                return 1;
1.40      christos  726:        }
                    727:
                    728:        cmd = command + offs + idx + 1;
                    729:
                    730:        /* Now parse any word designators */
                    731:
                    732:        if (*cmd == '%')        /* last word matched by ?pat? */
                    733:                tmp = strdup(last_search_match? last_search_match:"");
                    734:        else if (strchr("^*$-0123456789", *cmd)) {
                    735:                start = end = -1;
                    736:                if (*cmd == '^')
                    737:                        start = end = 1, cmd++;
                    738:                else if (*cmd == '$')
                    739:                        start = -1, cmd++;
                    740:                else if (*cmd == '*')
                    741:                        start = 1, cmd++;
                    742:               else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
                    743:                        start = 0;
                    744:                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    745:                                start = start * 10 + *cmd++ - '0';
                    746:
                    747:                        if (*cmd == '-') {
                    748:                                if (isdigit((unsigned char) cmd[1])) {
                    749:                                        cmd++;
                    750:                                        end = 0;
                    751:                                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    752:                                                end = end * 10 + *cmd++ - '0';
                    753:                                } else if (cmd[1] == '$') {
                    754:                                        cmd += 2;
                    755:                                        end = -1;
                    756:                                } else {
                    757:                                        cmd++;
                    758:                                        end = -2;
                    759:                                }
                    760:                        } else if (*cmd == '*')
                    761:                                end = -1, cmd++;
1.1       christos  762:                        else
1.40      christos  763:                                end = start;
                    764:                }
                    765:                tmp = history_arg_extract(start, end, aptr? aptr:ptr);
                    766:                if (tmp == NULL) {
                    767:                        (void)fprintf(rl_outstream, "%s: Bad word specifier",
                    768:                            command + offs + idx);
                    769:                        if (aptr)
1.95      christos  770:                                el_free(aptr);
1.96      christos  771:                        return -1;
1.40      christos  772:                }
                    773:        } else
                    774:                tmp = strdup(aptr? aptr:ptr);
1.1       christos  775:
1.40      christos  776:        if (aptr)
1.95      christos  777:                el_free(aptr);
1.1       christos  778:
1.77      lukem     779:        if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
1.40      christos  780:                *result = tmp;
1.96      christos  781:                return 1;
1.1       christos  782:        }
                    783:
                    784:        for (; *cmd; cmd++) {
                    785:                if (*cmd == ':')
                    786:                        continue;
1.40      christos  787:                else if (*cmd == 'h') {         /* remove trailing path */
                    788:                        if ((aptr = strrchr(tmp, '/')) != NULL)
1.76      christos  789:                                *aptr = '\0';
1.40      christos  790:                } else if (*cmd == 't') {       /* remove leading path */
                    791:                        if ((aptr = strrchr(tmp, '/')) != NULL) {
                    792:                                aptr = strdup(aptr + 1);
1.95      christos  793:                                el_free(tmp);
1.40      christos  794:                                tmp = aptr;
                    795:                        }
                    796:                } else if (*cmd == 'r') {       /* remove trailing suffix */
                    797:                        if ((aptr = strrchr(tmp, '.')) != NULL)
1.76      christos  798:                                *aptr = '\0';
1.40      christos  799:                } else if (*cmd == 'e') {       /* remove all but suffix */
                    800:                        if ((aptr = strrchr(tmp, '.')) != NULL) {
                    801:                                aptr = strdup(aptr);
1.95      christos  802:                                el_free(tmp);
1.40      christos  803:                                tmp = aptr;
                    804:                        }
                    805:                } else if (*cmd == 'p')         /* print only */
                    806:                        p_on = 1;
1.1       christos  807:                else if (*cmd == 'g')
                    808:                        g_on = 2;
                    809:                else if (*cmd == 's' || *cmd == '&') {
1.11      lukem     810:                        char *what, *with, delim;
1.30      christos  811:                        size_t len, from_len;
1.5       christos  812:                        size_t size;
1.1       christos  813:
                    814:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    815:                                continue;
                    816:                        else if (*cmd == 's') {
                    817:                                delim = *(++cmd), cmd++;
                    818:                                size = 16;
1.95      christos  819:                                what = el_realloc(from, size * sizeof(*what));
1.23      christos  820:                                if (what == NULL) {
1.95      christos  821:                                        el_free(from);
                    822:                                        el_free(tmp);
1.28      christos  823:                                        return 0;
1.23      christos  824:                                }
1.1       christos  825:                                len = 0;
                    826:                                for (; *cmd && *cmd != delim; cmd++) {
1.40      christos  827:                                        if (*cmd == '\\' && cmd[1] == delim)
1.1       christos  828:                                                cmd++;
1.23      christos  829:                                        if (len >= size) {
                    830:                                                char *nwhat;
1.95      christos  831:                                                nwhat = el_realloc(what,
                    832:                                                    (size <<= 1) *
                    833:                                                    sizeof(*nwhat));
1.23      christos  834:                                                if (nwhat == NULL) {
1.95      christos  835:                                                        el_free(what);
                    836:                                                        el_free(tmp);
1.28      christos  837:                                                        return 0;
1.23      christos  838:                                                }
                    839:                                                what = nwhat;
                    840:                                        }
1.1       christos  841:                                        what[len++] = *cmd;
                    842:                                }
                    843:                                what[len] = '\0';
                    844:                                from = what;
                    845:                                if (*what == '\0') {
1.95      christos  846:                                        el_free(what);
1.23      christos  847:                                        if (search) {
1.1       christos  848:                                                from = strdup(search);
1.62      christos  849:                                                if (from == NULL) {
1.95      christos  850:                                                        el_free(tmp);
1.28      christos  851:                                                        return 0;
1.62      christos  852:                                                }
1.23      christos  853:                                        } else {
1.1       christos  854:                                                from = NULL;
1.95      christos  855:                                                el_free(tmp);
1.96      christos  856:                                                return -1;
1.1       christos  857:                                        }
                    858:                                }
                    859:                                cmd++;  /* shift after delim */
                    860:                                if (!*cmd)
                    861:                                        continue;
                    862:
                    863:                                size = 16;
1.95      christos  864:                                with = el_realloc(to, size * sizeof(*with));
1.23      christos  865:                                if (with == NULL) {
1.95      christos  866:                                        el_free(to);
                    867:                                        el_free(tmp);
1.23      christos  868:                                        return -1;
                    869:                                }
1.1       christos  870:                                len = 0;
                    871:                                from_len = strlen(from);
                    872:                                for (; *cmd && *cmd != delim; cmd++) {
                    873:                                        if (len + from_len + 1 >= size) {
1.23      christos  874:                                                char *nwith;
1.1       christos  875:                                                size += from_len + 1;
1.95      christos  876:                                                nwith = el_realloc(with,
                    877:                                                    size * sizeof(*nwith));
1.23      christos  878:                                                if (nwith == NULL) {
1.95      christos  879:                                                        el_free(with);
                    880:                                                        el_free(tmp);
1.23      christos  881:                                                        return -1;
                    882:                                                }
                    883:                                                with = nwith;
1.1       christos  884:                                        }
                    885:                                        if (*cmd == '&') {
                    886:                                                /* safe */
1.40      christos  887:                                                (void)strcpy(&with[len], from);
1.1       christos  888:                                                len += from_len;
                    889:                                                continue;
                    890:                                        }
                    891:                                        if (*cmd == '\\'
                    892:                                            && (*(cmd + 1) == delim
                    893:                                                || *(cmd + 1) == '&'))
                    894:                                                cmd++;
                    895:                                        with[len++] = *cmd;
                    896:                                }
                    897:                                with[len] = '\0';
                    898:                                to = with;
                    899:                        }
                    900:
1.40      christos  901:                        aptr = _rl_compat_sub(tmp, from, to, g_on);
                    902:                        if (aptr) {
1.95      christos  903:                                el_free(tmp);
1.40      christos  904:                                tmp = aptr;
1.23      christos  905:                        }
1.40      christos  906:                        g_on = 0;
1.1       christos  907:                }
1.5       christos  908:        }
1.40      christos  909:        *result = tmp;
1.96      christos  910:        return p_on? 2:1;
1.1       christos  911: }
                    912:
1.11      lukem     913:
1.1       christos  914: /*
                    915:  * csh-style history expansion
                    916:  */
                    917: int
1.11      lukem     918: history_expand(char *str, char **output)
                    919: {
1.40      christos  920:        int ret = 0;
                    921:        size_t idx, i, size;
                    922:        char *tmp, *result;
1.1       christos  923:
                    924:        if (h == NULL || e == NULL)
                    925:                rl_initialize();
                    926:
1.40      christos  927:        if (history_expansion_char == 0) {
                    928:                *output = strdup(str);
1.96      christos  929:                return 0;
1.40      christos  930:        }
1.1       christos  931:
1.40      christos  932:        *output = NULL;
1.1       christos  933:        if (str[0] == history_subst_char) {
                    934:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
1.100     christos  935:                *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output));
1.40      christos  936:                if (*output == NULL)
                    937:                        return 0;
                    938:                (*output)[0] = (*output)[1] = history_expansion_char;
                    939:                (*output)[2] = ':';
                    940:                (*output)[3] = 's';
                    941:                (void)strcpy((*output) + 4, str);
                    942:                str = *output;
                    943:        } else {
                    944:                *output = strdup(str);
                    945:                if (*output == NULL)
                    946:                        return 0;
1.1       christos  947:        }
1.40      christos  948:
1.63      christos  949: #define ADD_STRING(what, len, fr)                                      \
1.1       christos  950:        {                                                               \
1.23      christos  951:                if (idx + len + 1 > size) {                             \
1.95      christos  952:                        char *nresult = el_realloc(result,              \
                    953:                            (size += len + 1) * sizeof(*nresult));      \
1.23      christos  954:                        if (nresult == NULL) {                          \
1.95      christos  955:                                el_free(*output);                       \
1.65      christos  956:                                if (/*CONSTCOND*/fr)                    \
1.95      christos  957:                                        el_free(tmp);                   \
1.28      christos  958:                                return 0;                               \
1.23      christos  959:                        }                                               \
                    960:                        result = nresult;                               \
                    961:                }                                                       \
1.1       christos  962:                (void)strncpy(&result[idx], what, len);                 \
                    963:                idx += len;                                             \
                    964:                result[idx] = '\0';                                     \
                    965:        }
                    966:
                    967:        result = NULL;
                    968:        size = idx = 0;
1.64      christos  969:        tmp = NULL;
1.1       christos  970:        for (i = 0; str[i];) {
1.40      christos  971:                int qchar, loop_again;
                    972:                size_t len, start, j;
1.1       christos  973:
1.40      christos  974:                qchar = 0;
1.1       christos  975:                loop_again = 1;
                    976:                start = j = i;
                    977: loop:
                    978:                for (; str[j]; j++) {
                    979:                        if (str[j] == '\\' &&
                    980:                            str[j + 1] == history_expansion_char) {
1.115     christos  981:                                len = strlen(&str[j + 1]) + 1;
                    982:                                memmove(&str[j], &str[j + 1], len);
1.1       christos  983:                                continue;
                    984:                        }
                    985:                        if (!loop_again) {
1.40      christos  986:                                if (isspace((unsigned char) str[j])
                    987:                                    || str[j] == qchar)
1.1       christos  988:                                        break;
                    989:                        }
                    990:                        if (str[j] == history_expansion_char
                    991:                            && !strchr(history_no_expand_chars, str[j + 1])
                    992:                            && (!history_inhibit_expansion_function ||
1.40      christos  993:                            (*history_inhibit_expansion_function)(str,
                    994:                            (int)j) == 0))
1.1       christos  995:                                break;
                    996:                }
                    997:
1.40      christos  998:                if (str[j] && loop_again) {
1.1       christos  999:                        i = j;
1.40      christos 1000:                        qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
1.1       christos 1001:                        j++;
                   1002:                        if (str[j] == history_expansion_char)
                   1003:                                j++;
                   1004:                        loop_again = 0;
                   1005:                        goto loop;
                   1006:                }
                   1007:                len = i - start;
1.64      christos 1008:                ADD_STRING(&str[start], len, 0);
1.1       christos 1009:
1.40      christos 1010:                if (str[i] == '\0' || str[i] != history_expansion_char) {
1.1       christos 1011:                        len = j - i;
1.64      christos 1012:                        ADD_STRING(&str[i], len, 0);
1.1       christos 1013:                        if (start == 0)
1.40      christos 1014:                                ret = 0;
1.1       christos 1015:                        else
1.40      christos 1016:                                ret = 1;
1.1       christos 1017:                        break;
                   1018:                }
1.40      christos 1019:                ret = _history_expand_command (str, i, (j - i), &tmp);
                   1020:                if (ret > 0 && tmp) {
                   1021:                        len = strlen(tmp);
1.63      christos 1022:                        ADD_STRING(tmp, len, 1);
1.66      christos 1023:                }
                   1024:                if (tmp) {
1.95      christos 1025:                        el_free(tmp);
1.64      christos 1026:                        tmp = NULL;
1.1       christos 1027:                }
                   1028:                i = j;
1.40      christos 1029:        }
1.1       christos 1030:
1.40      christos 1031:        /* ret is 2 for "print only" option */
                   1032:        if (ret == 2) {
                   1033:                add_history(result);
1.1       christos 1034: #ifdef GDB_411_HACK
                   1035:                /* gdb 4.11 has been shipped with readline, where */
                   1036:                /* history_expand() returned -1 when the line     */
                   1037:                /* should not be executed; in readline 2.1+       */
                   1038:                /* it should return 2 in such a case              */
1.40      christos 1039:                ret = -1;
1.1       christos 1040: #endif
                   1041:        }
1.95      christos 1042:        el_free(*output);
1.1       christos 1043:        *output = result;
                   1044:
1.96      christos 1045:        return ret;
1.1       christos 1046: }
                   1047:
1.40      christos 1048: /*
                   1049: * Return a string consisting of arguments of "str" from "start" to "end".
                   1050: */
                   1051: char *
                   1052: history_arg_extract(int start, int end, const char *str)
                   1053: {
                   1054:        size_t  i, len, max;
1.84      christos 1055:        char    **arr, *result = NULL;
1.40      christos 1056:
                   1057:        arr = history_tokenize(str);
                   1058:        if (!arr)
1.84      christos 1059:                return NULL;
                   1060:        if (arr && *arr == NULL)
                   1061:                goto out;
1.40      christos 1062:
                   1063:        for (max = 0; arr[max]; max++)
                   1064:                continue;
                   1065:        max--;
                   1066:
                   1067:        if (start == '$')
1.80      christos 1068:                start = (int)max;
1.40      christos 1069:        if (end == '$')
1.80      christos 1070:                end = (int)max;
1.40      christos 1071:        if (end < 0)
1.80      christos 1072:                end = (int)max + end + 1;
1.40      christos 1073:        if (start < 0)
                   1074:                start = end;
                   1075:
1.84      christos 1076:        if (start < 0 || end < 0 || (size_t)start > max ||
                   1077:            (size_t)end > max || start > end)
                   1078:                goto out;
1.40      christos 1079:
1.99      christos 1080:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++)
1.40      christos 1081:                len += strlen(arr[i]) + 1;
                   1082:        len++;
1.95      christos 1083:        result = el_malloc(len * sizeof(*result));
1.40      christos 1084:        if (result == NULL)
1.84      christos 1085:                goto out;
1.40      christos 1086:
1.99      christos 1087:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++) {
1.40      christos 1088:                (void)strcpy(result + len, arr[i]);
                   1089:                len += strlen(arr[i]);
1.77      lukem    1090:                if (i < (size_t)end)
1.40      christos 1091:                        result[len++] = ' ';
                   1092:        }
1.76      christos 1093:        result[len] = '\0';
1.40      christos 1094:
1.84      christos 1095: out:
1.40      christos 1096:        for (i = 0; arr[i]; i++)
1.95      christos 1097:                el_free(arr[i]);
                   1098:        el_free(arr);
1.40      christos 1099:
1.84      christos 1100:        return result;
1.40      christos 1101: }
1.11      lukem    1102:
1.1       christos 1103: /*
1.40      christos 1104:  * Parse the string into individual tokens,
                   1105:  * similar to how shell would do it.
1.1       christos 1106:  */
                   1107: char **
1.11      lukem    1108: history_tokenize(const char *str)
1.1       christos 1109: {
1.40      christos 1110:        int size = 1, idx = 0, i, start;
1.5       christos 1111:        size_t len;
1.1       christos 1112:        char **result = NULL, *temp, delim = '\0';
                   1113:
1.40      christos 1114:        for (i = 0; str[i];) {
1.4       christos 1115:                while (isspace((unsigned char) str[i]))
1.1       christos 1116:                        i++;
                   1117:                start = i;
1.40      christos 1118:                for (; str[i];) {
1.9       jdolecek 1119:                        if (str[i] == '\\') {
1.14      jdolecek 1120:                                if (str[i+1] != '\0')
1.9       jdolecek 1121:                                        i++;
                   1122:                        } else if (str[i] == delim)
1.1       christos 1123:                                delim = '\0';
                   1124:                        else if (!delim &&
1.11      lukem    1125:                                    (isspace((unsigned char) str[i]) ||
                   1126:                                strchr("()<>;&|$", str[i])))
1.1       christos 1127:                                break;
                   1128:                        else if (!delim && strchr("'`\"", str[i]))
                   1129:                                delim = str[i];
1.40      christos 1130:                        if (str[i])
                   1131:                                i++;
1.1       christos 1132:                }
                   1133:
1.40      christos 1134:                if (idx + 2 >= size) {
1.23      christos 1135:                        char **nresult;
1.1       christos 1136:                        size <<= 1;
1.99      christos 1137:                        nresult = el_realloc(result, (size_t)size * sizeof(*nresult));
1.23      christos 1138:                        if (nresult == NULL) {
1.95      christos 1139:                                el_free(result);
1.23      christos 1140:                                return NULL;
                   1141:                        }
                   1142:                        result = nresult;
1.1       christos 1143:                }
1.99      christos 1144:                len = (size_t)i - (size_t)start;
                   1145:                temp = el_malloc((size_t)(len + 1) * sizeof(*temp));
1.23      christos 1146:                if (temp == NULL) {
1.40      christos 1147:                        for (i = 0; i < idx; i++)
1.95      christos 1148:                                el_free(result[i]);
                   1149:                        el_free(result);
1.23      christos 1150:                        return NULL;
                   1151:                }
1.40      christos 1152:                (void)strncpy(temp, &str[start], len);
1.1       christos 1153:                temp[len] = '\0';
1.40      christos 1154:                result[idx++] = temp;
                   1155:                result[idx] = NULL;
                   1156:                if (str[i])
                   1157:                        i++;
1.1       christos 1158:        }
1.96      christos 1159:        return result;
1.1       christos 1160: }
                   1161:
1.11      lukem    1162:
1.1       christos 1163: /*
                   1164:  * limit size of history record to ``max'' events
                   1165:  */
                   1166: void
1.11      lukem    1167: stifle_history(int max)
1.1       christos 1168: {
1.92      christos 1169:        HistEvent ev;
1.1       christos 1170:
                   1171:        if (h == NULL || e == NULL)
                   1172:                rl_initialize();
                   1173:
1.92      christos 1174:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos 1175:                max_input_history = max;
                   1176: }
                   1177:
1.11      lukem    1178:
1.1       christos 1179: /*
                   1180:  * "unlimit" size of history - set the limit to maximum allowed int value
                   1181:  */
                   1182: int
1.11      lukem    1183: unstifle_history(void)
1.1       christos 1184: {
1.92      christos 1185:        HistEvent ev;
1.1       christos 1186:        int omax;
                   1187:
1.92      christos 1188:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos 1189:        omax = max_input_history;
                   1190:        max_input_history = INT_MAX;
1.96      christos 1191:        return omax;            /* some value _must_ be returned */
1.1       christos 1192: }
                   1193:
1.11      lukem    1194:
1.1       christos 1195: int
1.11      lukem    1196: history_is_stifled(void)
1.1       christos 1197: {
1.11      lukem    1198:
1.1       christos 1199:        /* cannot return true answer */
1.96      christos 1200:        return max_input_history != INT_MAX;
1.1       christos 1201: }
                   1202:
1.85      christos 1203: static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
                   1204:
                   1205: int
                   1206: history_truncate_file (const char *filename, int nlines)
                   1207: {
                   1208:        int ret = 0;
                   1209:        FILE *fp, *tp;
                   1210:        char template[sizeof(_history_tmp_template)];
                   1211:        char buf[4096];
                   1212:        int fd;
                   1213:        char *cp;
                   1214:        off_t off;
                   1215:        int count = 0;
                   1216:        ssize_t left = 0;
                   1217:
                   1218:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1219:                return errno;
                   1220:        if ((fp = fopen(filename, "r+")) == NULL)
                   1221:                return errno;
                   1222:        strcpy(template, _history_tmp_template);
                   1223:        if ((fd = mkstemp(template)) == -1) {
                   1224:                ret = errno;
                   1225:                goto out1;
                   1226:        }
                   1227:
                   1228:        if ((tp = fdopen(fd, "r+")) == NULL) {
                   1229:                close(fd);
                   1230:                ret = errno;
                   1231:                goto out2;
                   1232:        }
                   1233:
                   1234:        for(;;) {
1.98      christos 1235:                if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) {
1.85      christos 1236:                        if (ferror(fp)) {
                   1237:                                ret = errno;
                   1238:                                break;
                   1239:                        }
                   1240:                        if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
                   1241:                            (off_t)-1) {
                   1242:                                ret = errno;
                   1243:                                break;
                   1244:                        }
1.99      christos 1245:                        left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp);
1.85      christos 1246:                        if (ferror(fp)) {
                   1247:                                ret = errno;
                   1248:                                break;
                   1249:                        }
                   1250:                        if (left == 0) {
                   1251:                                count--;
                   1252:                                left = sizeof(buf);
1.98      christos 1253:                        } else if (fwrite(buf, (size_t)left, (size_t)1, tp)
                   1254:                            != 1) {
1.85      christos 1255:                                ret = errno;
                   1256:                                break;
                   1257:                        }
                   1258:                        fflush(tp);
                   1259:                        break;
                   1260:                }
1.98      christos 1261:                if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1262:                        ret = errno;
                   1263:                        break;
                   1264:                }
                   1265:                count++;
                   1266:        }
                   1267:        if (ret)
                   1268:                goto out3;
                   1269:        cp = buf + left - 1;
                   1270:        if(*cp != '\n')
                   1271:                cp++;
                   1272:        for(;;) {
                   1273:                while (--cp >= buf) {
                   1274:                        if (*cp == '\n') {
                   1275:                                if (--nlines == 0) {
                   1276:                                        if (++cp >= buf + sizeof(buf)) {
                   1277:                                                count++;
                   1278:                                                cp = buf;
                   1279:                                        }
                   1280:                                        break;
                   1281:                                }
                   1282:                        }
                   1283:                }
                   1284:                if (nlines <= 0 || count == 0)
                   1285:                        break;
                   1286:                count--;
                   1287:                if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
                   1288:                        ret = errno;
                   1289:                        break;
                   1290:                }
1.98      christos 1291:                if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1292:                        if (ferror(tp)) {
                   1293:                                ret = errno;
                   1294:                                break;
                   1295:                        }
                   1296:                        ret = EAGAIN;
                   1297:                        break;
                   1298:                }
                   1299:                cp = buf + sizeof(buf);
                   1300:        }
                   1301:
                   1302:        if (ret || nlines > 0)
                   1303:                goto out3;
                   1304:
1.98      christos 1305:        if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) {
1.85      christos 1306:                ret = errno;
                   1307:                goto out3;
                   1308:        }
                   1309:
                   1310:        if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
                   1311:            (off_t)-1) {
                   1312:                ret = errno;
                   1313:                goto out3;
                   1314:        }
                   1315:
                   1316:        for(;;) {
1.99      christos 1317:                if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) {
1.85      christos 1318:                        if (ferror(fp))
                   1319:                                ret = errno;
                   1320:                        break;
                   1321:                }
1.98      christos 1322:                if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) {
1.85      christos 1323:                        ret = errno;
                   1324:                        break;
                   1325:                }
                   1326:        }
                   1327:        fflush(fp);
                   1328:        if((off = ftello(fp)) > 0)
                   1329:                (void)ftruncate(fileno(fp), off);
                   1330: out3:
                   1331:        fclose(tp);
                   1332: out2:
                   1333:        unlink(template);
                   1334: out1:
                   1335:        fclose(fp);
                   1336:
                   1337:        return ret;
                   1338: }
                   1339:
1.11      lukem    1340:
1.1       christos 1341: /*
                   1342:  * read history from a file given
                   1343:  */
                   1344: int
1.11      lukem    1345: read_history(const char *filename)
1.1       christos 1346: {
1.92      christos 1347:        HistEvent ev;
1.1       christos 1348:
                   1349:        if (h == NULL || e == NULL)
                   1350:                rl_initialize();
1.85      christos 1351:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1352:                return errno;
1.96      christos 1353:        return history(h, &ev, H_LOAD, filename) == -1 ?
                   1354:            (errno ? errno : EINVAL) : 0;
1.1       christos 1355: }
                   1356:
1.11      lukem    1357:
1.1       christos 1358: /*
                   1359:  * write history to a file given
                   1360:  */
                   1361: int
1.11      lukem    1362: write_history(const char *filename)
1.1       christos 1363: {
1.92      christos 1364:        HistEvent ev;
1.1       christos 1365:
                   1366:        if (h == NULL || e == NULL)
                   1367:                rl_initialize();
1.85      christos 1368:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1369:                return errno;
1.96      christos 1370:        return history(h, &ev, H_SAVE, filename) == -1 ?
                   1371:            (errno ? errno : EINVAL) : 0;
1.1       christos 1372: }
                   1373:
1.11      lukem    1374:
1.1       christos 1375: /*
                   1376:  * returns history ``num''th event
                   1377:  *
                   1378:  * returned pointer points to static variable
                   1379:  */
1.2       christos 1380: HIST_ENTRY *
1.11      lukem    1381: history_get(int num)
1.1       christos 1382: {
                   1383:        static HIST_ENTRY she;
1.92      christos 1384:        HistEvent ev;
1.40      christos 1385:        int curr_num;
1.1       christos 1386:
                   1387:        if (h == NULL || e == NULL)
                   1388:                rl_initialize();
                   1389:
1.40      christos 1390:        /* save current position */
1.92      christos 1391:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1392:                return NULL;
1.1       christos 1393:        curr_num = ev.num;
1.40      christos 1394:
1.85      christos 1395:        /* start from the oldest */
1.92      christos 1396:        if (history(h, &ev, H_LAST) != 0)
1.96      christos 1397:                return NULL;    /* error */
1.40      christos 1398:
1.85      christos 1399:        /* look forwards for event matching specified offset */
1.92      christos 1400:        if (history(h, &ev, H_NEXT_EVDATA, num, &she.data))
1.96      christos 1401:                return NULL;
1.1       christos 1402:
1.92      christos 1403:        she.line = ev.str;
1.1       christos 1404:
1.40      christos 1405:        /* restore pointer to where it was */
1.92      christos 1406:        (void)history(h, &ev, H_SET, curr_num);
1.1       christos 1407:
1.96      christos 1408:        return &she;
1.1       christos 1409: }
                   1410:
1.11      lukem    1411:
1.1       christos 1412: /*
                   1413:  * add the line to history table
                   1414:  */
                   1415: int
1.11      lukem    1416: add_history(const char *line)
1.1       christos 1417: {
1.92      christos 1418:        HistEvent ev;
1.1       christos 1419:
1.104     christos 1420:        if (line == NULL)
                   1421:                return 0;
                   1422:
1.1       christos 1423:        if (h == NULL || e == NULL)
                   1424:                rl_initialize();
                   1425:
1.92      christos 1426:        (void)history(h, &ev, H_ENTER, line);
                   1427:        if (history(h, &ev, H_GETSIZE) == 0)
1.1       christos 1428:                history_length = ev.num;
                   1429:
1.96      christos 1430:        return !(history_length > 0); /* return 0 if all is okay */
1.1       christos 1431: }
                   1432:
1.11      lukem    1433:
1.1       christos 1434: /*
1.58      christos 1435:  * remove the specified entry from the history list and return it.
                   1436:  */
                   1437: HIST_ENTRY *
                   1438: remove_history(int num)
                   1439: {
1.85      christos 1440:        HIST_ENTRY *he;
1.92      christos 1441:        HistEvent ev;
1.58      christos 1442:
                   1443:        if (h == NULL || e == NULL)
                   1444:                rl_initialize();
                   1445:
1.95      christos 1446:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.58      christos 1447:                return NULL;
                   1448:
1.92      christos 1449:        if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1.95      christos 1450:                el_free(he);
1.71      christos 1451:                return NULL;
1.85      christos 1452:        }
1.71      christos 1453:
1.92      christos 1454:        he->line = ev.str;
                   1455:        if (history(h, &ev, H_GETSIZE) == 0)
1.85      christos 1456:                history_length = ev.num;
1.58      christos 1457:
1.85      christos 1458:        return he;
1.58      christos 1459: }
                   1460:
                   1461:
                   1462: /*
1.85      christos 1463:  * replace the line and data of the num-th entry
                   1464:  */
                   1465: HIST_ENTRY *
                   1466: replace_history_entry(int num, const char *line, histdata_t data)
                   1467: {
                   1468:        HIST_ENTRY *he;
1.92      christos 1469:        HistEvent ev;
1.85      christos 1470:        int curr_num;
                   1471:
                   1472:        if (h == NULL || e == NULL)
                   1473:                rl_initialize();
                   1474:
                   1475:        /* save current position */
1.92      christos 1476:        if (history(h, &ev, H_CURR) != 0)
1.85      christos 1477:                return NULL;
                   1478:        curr_num = ev.num;
                   1479:
                   1480:        /* start from the oldest */
1.92      christos 1481:        if (history(h, &ev, H_LAST) != 0)
1.85      christos 1482:                return NULL;    /* error */
                   1483:
1.95      christos 1484:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.85      christos 1485:                return NULL;
                   1486:
                   1487:        /* look forwards for event matching specified offset */
1.92      christos 1488:        if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1.85      christos 1489:                goto out;
                   1490:
1.92      christos 1491:        he->line = strdup(ev.str);
1.85      christos 1492:        if (he->line == NULL)
                   1493:                goto out;
                   1494:
1.92      christos 1495:        if (history(h, &ev, H_REPLACE, line, data))
1.85      christos 1496:                goto out;
                   1497:
                   1498:        /* restore pointer to where it was */
1.92      christos 1499:        if (history(h, &ev, H_SET, curr_num))
1.85      christos 1500:                goto out;
                   1501:
                   1502:        return he;
                   1503: out:
1.95      christos 1504:        el_free(he);
1.85      christos 1505:        return NULL;
                   1506: }
                   1507:
                   1508: /*
1.1       christos 1509:  * clear the history list - delete all entries
                   1510:  */
                   1511: void
1.11      lukem    1512: clear_history(void)
1.1       christos 1513: {
1.92      christos 1514:        HistEvent ev;
1.11      lukem    1515:
1.110     christos 1516:        if (h == NULL || e == NULL)
                   1517:                rl_initialize();
                   1518:
1.92      christos 1519:        (void)history(h, &ev, H_CLEAR);
1.85      christos 1520:        history_length = 0;
1.1       christos 1521: }
                   1522:
1.11      lukem    1523:
1.1       christos 1524: /*
                   1525:  * returns offset of the current history event
                   1526:  */
                   1527: int
1.11      lukem    1528: where_history(void)
1.1       christos 1529: {
1.92      christos 1530:        HistEvent ev;
1.1       christos 1531:        int curr_num, off;
                   1532:
1.92      christos 1533:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1534:                return 0;
1.1       christos 1535:        curr_num = ev.num;
                   1536:
1.92      christos 1537:        (void)history(h, &ev, H_FIRST);
1.1       christos 1538:        off = 1;
1.92      christos 1539:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1.1       christos 1540:                off++;
                   1541:
1.96      christos 1542:        return off;
1.1       christos 1543: }
                   1544:
1.11      lukem    1545:
1.1       christos 1546: /*
                   1547:  * returns current history event or NULL if there is no such event
                   1548:  */
1.2       christos 1549: HIST_ENTRY *
1.11      lukem    1550: current_history(void)
1.1       christos 1551: {
1.11      lukem    1552:
1.96      christos 1553:        return _move_history(H_CURR);
1.1       christos 1554: }
                   1555:
1.11      lukem    1556:
1.1       christos 1557: /*
                   1558:  * returns total number of bytes history events' data are using
                   1559:  */
                   1560: int
1.11      lukem    1561: history_total_bytes(void)
1.1       christos 1562: {
1.92      christos 1563:        HistEvent ev;
1.80      christos 1564:        int curr_num;
                   1565:        size_t size;
1.1       christos 1566:
1.92      christos 1567:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1568:                return -1;
1.1       christos 1569:        curr_num = ev.num;
                   1570:
1.92      christos 1571:        (void)history(h, &ev, H_FIRST);
1.1       christos 1572:        size = 0;
                   1573:        do
1.92      christos 1574:                size += strlen(ev.str) * sizeof(*ev.str);
                   1575:        while (history(h, &ev, H_NEXT) == 0);
1.1       christos 1576:
                   1577:        /* get to the same position as before */
1.92      christos 1578:        history(h, &ev, H_PREV_EVENT, curr_num);
1.1       christos 1579:
1.96      christos 1580:        return (int)size;
1.1       christos 1581: }
                   1582:
1.11      lukem    1583:
1.1       christos 1584: /*
                   1585:  * sets the position in the history list to ``pos''
                   1586:  */
                   1587: int
1.11      lukem    1588: history_set_pos(int pos)
1.1       christos 1589: {
1.92      christos 1590:        HistEvent ev;
1.40      christos 1591:        int curr_num;
1.1       christos 1592:
1.85      christos 1593:        if (pos >= history_length || pos < 0)
1.96      christos 1594:                return -1;
1.1       christos 1595:
1.92      christos 1596:        (void)history(h, &ev, H_CURR);
1.1       christos 1597:        curr_num = ev.num;
                   1598:
1.85      christos 1599:        /*
                   1600:         * use H_DELDATA to set to nth history (without delete) by passing
                   1601:         * (void **)-1
                   1602:         */
1.92      christos 1603:        if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
                   1604:                (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1605:                return -1;
1.1       christos 1606:        }
1.96      christos 1607:        return 0;
1.1       christos 1608: }
                   1609:
1.11      lukem    1610:
1.1       christos 1611: /*
                   1612:  * returns previous event in history and shifts pointer accordingly
                   1613:  */
1.2       christos 1614: HIST_ENTRY *
1.11      lukem    1615: previous_history(void)
1.1       christos 1616: {
1.11      lukem    1617:
1.96      christos 1618:        return _move_history(H_PREV);
1.1       christos 1619: }
                   1620:
1.11      lukem    1621:
1.1       christos 1622: /*
                   1623:  * returns next event in history and shifts pointer accordingly
                   1624:  */
1.2       christos 1625: HIST_ENTRY *
1.11      lukem    1626: next_history(void)
1.1       christos 1627: {
1.11      lukem    1628:
1.96      christos 1629:        return _move_history(H_NEXT);
1.1       christos 1630: }
                   1631:
1.11      lukem    1632:
1.1       christos 1633: /*
1.40      christos 1634:  * searches for first history event containing the str
1.1       christos 1635:  */
1.40      christos 1636: int
                   1637: history_search(const char *str, int direction)
1.11      lukem    1638: {
1.92      christos 1639:        HistEvent ev;
                   1640:        const char *strp;
1.11      lukem    1641:        int curr_num;
1.1       christos 1642:
1.92      christos 1643:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1644:                return -1;
1.1       christos 1645:        curr_num = ev.num;
                   1646:
                   1647:        for (;;) {
1.92      christos 1648:                if ((strp = strstr(ev.str, str)) != NULL)
1.96      christos 1649:                        return (int)(strp - ev.str);
1.92      christos 1650:                if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1.1       christos 1651:                        break;
                   1652:        }
1.92      christos 1653:        (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1654:        return -1;
1.1       christos 1655: }
                   1656:
1.11      lukem    1657:
1.1       christos 1658: /*
                   1659:  * searches for first history event beginning with str
                   1660:  */
                   1661: int
1.11      lukem    1662: history_search_prefix(const char *str, int direction)
1.1       christos 1663: {
1.92      christos 1664:        HistEvent ev;
1.11      lukem    1665:
1.92      christos 1666:        return (history(h, &ev, direction < 0 ?
1.88      christos 1667:            H_PREV_STR : H_NEXT_STR, str));
1.1       christos 1668: }
                   1669:
1.11      lukem    1670:
1.1       christos 1671: /*
                   1672:  * search for event in history containing str, starting at offset
                   1673:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1674:  */
1.5       christos 1675: /* ARGSUSED */
1.1       christos 1676: int
1.40      christos 1677: history_search_pos(const char *str,
1.30      christos 1678:                   int direction __attribute__((__unused__)), int pos)
1.1       christos 1679: {
1.92      christos 1680:        HistEvent ev;
1.11      lukem    1681:        int curr_num, off;
1.1       christos 1682:
                   1683:        off = (pos > 0) ? pos : -pos;
                   1684:        pos = (pos > 0) ? 1 : -1;
                   1685:
1.92      christos 1686:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1687:                return -1;
1.1       christos 1688:        curr_num = ev.num;
                   1689:
1.92      christos 1690:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1.96      christos 1691:                return -1;
1.1       christos 1692:
                   1693:        for (;;) {
1.92      christos 1694:                if (strstr(ev.str, str))
1.96      christos 1695:                        return off;
1.92      christos 1696:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1.1       christos 1697:                        break;
                   1698:        }
                   1699:
                   1700:        /* set "current" pointer back to previous state */
1.92      christos 1701:        (void)history(h, &ev,
1.88      christos 1702:            pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1.1       christos 1703:
1.96      christos 1704:        return -1;
1.1       christos 1705: }
                   1706:
                   1707:
                   1708: /********************************/
1.40      christos 1709: /* completion functions */
1.1       christos 1710:
1.57      christos 1711: char *
                   1712: tilde_expand(char *name)
                   1713: {
                   1714:        return fn_tilde_expand(name);
                   1715: }
                   1716:
                   1717: char *
                   1718: filename_completion_function(const char *name, int state)
                   1719: {
                   1720:        return fn_filename_completion_function(name, state);
                   1721: }
                   1722:
1.1       christos 1723: /*
                   1724:  * a completion generator for usernames; returns _first_ username
                   1725:  * which starts with supplied text
                   1726:  * text contains a partial username preceded by random character
1.94      christos 1727:  * (usually '~'); state resets search from start (??? should we do that anyway)
1.113     snj      1728:  * it's the caller's responsibility to free the returned value
1.1       christos 1729:  */
1.11      lukem    1730: char *
                   1731: username_completion_function(const char *text, int state)
1.1       christos 1732: {
1.94      christos 1733: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1734:        struct passwd pwres;
1.50      christos 1735:        char pwbuf[1024];
1.94      christos 1736: #endif
                   1737:        struct passwd *pass = NULL;
1.1       christos 1738:
                   1739:        if (text[0] == '\0')
1.96      christos 1740:                return NULL;
1.1       christos 1741:
                   1742:        if (*text == '~')
                   1743:                text++;
                   1744:
                   1745:        if (state == 0)
                   1746:                setpwent();
                   1747:
1.94      christos 1748:        while (
                   1749: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1750:            getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL
                   1751: #else
                   1752:            (pass = getpwent()) != NULL
                   1753: #endif
                   1754:            && text[0] == pass->pw_name[0]
                   1755:            && strcmp(text, pass->pw_name) == 0)
                   1756:                continue;
1.1       christos 1757:
1.94      christos 1758:        if (pass == NULL) {
1.1       christos 1759:                endpwent();
1.85      christos 1760:                return NULL;
1.1       christos 1761:        }
1.94      christos 1762:        return strdup(pass->pw_name);
1.1       christos 1763: }
                   1764:
1.11      lukem    1765:
1.1       christos 1766: /*
1.46      christos 1767:  * el-compatible wrapper to send TSTP on ^Z
                   1768:  */
                   1769: /* ARGSUSED */
                   1770: static unsigned char
                   1771: _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
                   1772: {
                   1773:        (void)kill(0, SIGTSTP);
                   1774:        return CC_NORM;
                   1775: }
1.11      lukem    1776:
1.1       christos 1777: /*
1.12      jdolecek 1778:  * Display list of strings in columnar format on readline's output stream.
                   1779:  * 'matches' is list of strings, 'len' is number of strings in 'matches',
                   1780:  * 'max' is maximum length of string in 'matches'.
                   1781:  */
                   1782: void
1.53      dsl      1783: rl_display_match_list(char **matches, int len, int max)
1.12      jdolecek 1784: {
                   1785:
1.81      christos 1786:        fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1.1       christos 1787: }
                   1788:
1.56      christos 1789: static const char *
                   1790: /*ARGSUSED*/
                   1791: _rl_completion_append_character_function(const char *dummy
                   1792:     __attribute__((__unused__)))
                   1793: {
                   1794:        static char buf[2];
1.99      christos 1795:        buf[0] = (char)rl_completion_append_character;
1.76      christos 1796:        buf[1] = '\0';
1.56      christos 1797:        return buf;
                   1798: }
                   1799:
1.11      lukem    1800:
1.1       christos 1801: /*
                   1802:  * complete word at current point
                   1803:  */
1.53      dsl      1804: /* ARGSUSED */
1.1       christos 1805: int
1.53      dsl      1806: rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1.1       christos 1807: {
1.86      christos 1808: #ifdef WIDECHAR
                   1809:        static ct_buffer_t wbreak_conv, sprefix_conv;
                   1810: #endif
1.102     christos 1811:        char *breakchars;
1.86      christos 1812:
1.1       christos 1813:        if (h == NULL || e == NULL)
                   1814:                rl_initialize();
                   1815:
                   1816:        if (rl_inhibit_completion) {
1.47      christos 1817:                char arr[2];
                   1818:                arr[0] = (char)invoking_key;
                   1819:                arr[1] = '\0';
                   1820:                el_insertstr(e, arr);
1.96      christos 1821:                return CC_REFRESH;
1.53      dsl      1822:        }
                   1823:
1.102     christos 1824:        if (rl_completion_word_break_hook != NULL)
                   1825:                breakchars = (*rl_completion_word_break_hook)();
                   1826:        else
                   1827:                breakchars = rl_basic_word_break_characters;
                   1828:
1.116     christos 1829:        _rl_update_pos();
                   1830:
1.53      dsl      1831:        /* Just look at how many global variables modify this operation! */
                   1832:        return fn_complete(e,
1.117     christos 1833:            (rl_compentry_func_t *)rl_completion_entry_function,
1.53      dsl      1834:            rl_attempted_completion_function,
1.86      christos 1835:            ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1.102     christos 1836:            ct_decode_string(breakchars, &sprefix_conv),
1.81      christos 1837:            _rl_completion_append_character_function,
                   1838:            (size_t)rl_completion_query_items,
1.53      dsl      1839:            &rl_completion_type, &rl_attempted_completion_over,
                   1840:            &rl_point, &rl_end);
1.92      christos 1841:
                   1842:
1.1       christos 1843: }
                   1844:
1.11      lukem    1845:
1.53      dsl      1846: /* ARGSUSED */
                   1847: static unsigned char
                   1848: _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
                   1849: {
                   1850:        return (unsigned char)rl_complete(0, ch);
                   1851: }
                   1852:
1.1       christos 1853: /*
1.7       simonb   1854:  * misc other functions
1.1       christos 1855:  */
                   1856:
                   1857: /*
                   1858:  * bind key c to readline-type function func
                   1859:  */
                   1860: int
1.85      christos 1861: rl_bind_key(int c, rl_command_func_t *func)
1.1       christos 1862: {
1.11      lukem    1863:        int retval = -1;
1.1       christos 1864:
                   1865:        if (h == NULL || e == NULL)
                   1866:                rl_initialize();
                   1867:
                   1868:        if (func == rl_insert) {
                   1869:                /* XXX notice there is no range checking of ``c'' */
                   1870:                e->el_map.key[c] = ED_INSERT;
                   1871:                retval = 0;
                   1872:        }
1.96      christos 1873:        return retval;
1.1       christos 1874: }
                   1875:
1.11      lukem    1876:
1.1       christos 1877: /*
                   1878:  * read one key from input - handles chars pushed back
                   1879:  * to input stream also
                   1880:  */
                   1881: int
1.11      lukem    1882: rl_read_key(void)
1.1       christos 1883: {
1.11      lukem    1884:        char fooarr[2 * sizeof(int)];
1.1       christos 1885:
                   1886:        if (e == NULL || h == NULL)
                   1887:                rl_initialize();
                   1888:
1.96      christos 1889:        return el_getc(e, fooarr);
1.1       christos 1890: }
                   1891:
1.11      lukem    1892:
1.1       christos 1893: /*
                   1894:  * reset the terminal
                   1895:  */
1.5       christos 1896: /* ARGSUSED */
1.1       christos 1897: void
1.30      christos 1898: rl_reset_terminal(const char *p __attribute__((__unused__)))
1.1       christos 1899: {
1.11      lukem    1900:
1.1       christos 1901:        if (h == NULL || e == NULL)
                   1902:                rl_initialize();
                   1903:        el_reset(e);
                   1904: }
                   1905:
1.11      lukem    1906:
1.1       christos 1907: /*
                   1908:  * insert character ``c'' back into input stream, ``count'' times
                   1909:  */
                   1910: int
1.11      lukem    1911: rl_insert(int count, int c)
1.1       christos 1912: {
1.11      lukem    1913:        char arr[2];
1.1       christos 1914:
                   1915:        if (h == NULL || e == NULL)
                   1916:                rl_initialize();
                   1917:
                   1918:        /* XXX - int -> char conversion can lose on multichars */
1.99      christos 1919:        arr[0] = (char)c;
1.1       christos 1920:        arr[1] = '\0';
                   1921:
                   1922:        for (; count > 0; count--)
                   1923:                el_push(e, arr);
                   1924:
1.96      christos 1925:        return 0;
1.35      christos 1926: }
                   1927:
1.85      christos 1928: int
                   1929: rl_insert_text(const char *text)
                   1930: {
                   1931:        if (!text || *text == 0)
1.96      christos 1932:                return 0;
1.85      christos 1933:
                   1934:        if (h == NULL || e == NULL)
                   1935:                rl_initialize();
                   1936:
                   1937:        if (el_insertstr(e, text) < 0)
1.96      christos 1938:                return 0;
1.85      christos 1939:        return (int)strlen(text);
                   1940: }
                   1941:
1.35      christos 1942: /*ARGSUSED*/
                   1943: int
1.97      christos 1944: rl_newline(int count __attribute__((__unused__)),
                   1945:     int c __attribute__((__unused__)))
1.35      christos 1946: {
                   1947:        /*
                   1948:         * Readline-4.0 appears to ignore the args.
                   1949:         */
                   1950:        return rl_insert(1, '\n');
                   1951: }
                   1952:
                   1953: /*ARGSUSED*/
                   1954: static unsigned char
1.97      christos 1955: rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c)
1.35      christos 1956: {
                   1957:        if (map[c] == NULL)
                   1958:            return CC_ERROR;
1.49      christos 1959:
                   1960:        _rl_update_pos();
                   1961:
1.116     christos 1962:        (*map[c])(1, c);
1.38      christos 1963:
                   1964:        /* If rl_done was set by the above call, deal with it here */
                   1965:        if (rl_done)
                   1966:                return CC_EOF;
                   1967:
1.35      christos 1968:        return CC_NORM;
                   1969: }
                   1970:
                   1971: int
1.116     christos 1972: rl_add_defun(const char *name, rl_command_func_t *fun, int c)
1.35      christos 1973: {
                   1974:        char dest[8];
1.77      lukem    1975:        if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1.35      christos 1976:                return -1;
                   1977:        map[(unsigned char)c] = fun;
                   1978:        el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1.37      christos 1979:        vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1.106     christos 1980:        el_set(e, EL_BIND, dest, name, NULL);
1.35      christos 1981:        return 0;
                   1982: }
                   1983:
                   1984: void
1.101     matt     1985: rl_callback_read_char(void)
1.35      christos 1986: {
1.36      christos 1987:        int count = 0, done = 0;
1.35      christos 1988:        const char *buf = el_gets(e, &count);
                   1989:        char *wbuf;
                   1990:
                   1991:        if (buf == NULL || count-- <= 0)
                   1992:                return;
1.61      christos 1993:        if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1.36      christos 1994:                done = 1;
                   1995:        if (buf[count] == '\n' || buf[count] == '\r')
                   1996:                done = 2;
                   1997:
                   1998:        if (done && rl_linefunc != NULL) {
1.35      christos 1999:                el_set(e, EL_UNBUFFERED, 0);
1.36      christos 2000:                if (done == 2) {
                   2001:                    if ((wbuf = strdup(buf)) != NULL)
                   2002:                        wbuf[count] = '\0';
                   2003:                } else
                   2004:                        wbuf = NULL;
1.35      christos 2005:                (*(void (*)(const char *))rl_linefunc)(wbuf);
1.111     christos 2006:                el_set(e, EL_UNBUFFERED, 1);
1.35      christos 2007:        }
                   2008: }
                   2009:
1.125   ! christos 2010: void
1.117     christos 2011: rl_callback_handler_install(const char *prompt, rl_vcpfunc_t *linefunc)
1.35      christos 2012: {
                   2013:        if (e == NULL) {
                   2014:                rl_initialize();
                   2015:        }
1.78      christos 2016:        (void)rl_set_prompt(prompt);
1.35      christos 2017:        rl_linefunc = linefunc;
                   2018:        el_set(e, EL_UNBUFFERED, 1);
1.125   ! christos 2019: }
1.35      christos 2020:
1.125   ! christos 2021: void
1.35      christos 2022: rl_callback_handler_remove(void)
                   2023: {
                   2024:        el_set(e, EL_UNBUFFERED, 0);
1.72      christos 2025:        rl_linefunc = NULL;
1.35      christos 2026: }
                   2027:
                   2028: void
                   2029: rl_redisplay(void)
                   2030: {
                   2031:        char a[2];
1.99      christos 2032:        a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT];
1.35      christos 2033:        a[1] = '\0';
                   2034:        el_push(e, a);
                   2035: }
                   2036:
                   2037: int
                   2038: rl_get_previous_history(int count, int key)
                   2039: {
                   2040:        char a[2];
1.99      christos 2041:        a[0] = (char)key;
1.35      christos 2042:        a[1] = '\0';
                   2043:        while (count--)
                   2044:                el_push(e, a);
                   2045:        return 0;
1.38      christos 2046: }
                   2047:
                   2048: void
                   2049: /*ARGSUSED*/
1.97      christos 2050: rl_prep_terminal(int meta_flag __attribute__((__unused__)))
1.38      christos 2051: {
                   2052:        el_set(e, EL_PREP_TERM, 1);
                   2053: }
                   2054:
                   2055: void
1.68      christos 2056: rl_deprep_terminal(void)
1.38      christos 2057: {
                   2058:        el_set(e, EL_PREP_TERM, 0);
                   2059: }
                   2060:
                   2061: int
                   2062: rl_read_init_file(const char *s)
                   2063: {
1.96      christos 2064:        return el_source(e, s);
1.38      christos 2065: }
                   2066:
                   2067: int
                   2068: rl_parse_and_bind(const char *line)
                   2069: {
                   2070:        const char **argv;
                   2071:        int argc;
                   2072:        Tokenizer *tok;
                   2073:
                   2074:        tok = tok_init(NULL);
1.44      lukem    2075:        tok_str(tok, line, &argc, &argv);
1.38      christos 2076:        argc = el_parse(e, argc, argv);
                   2077:        tok_end(tok);
1.96      christos 2078:        return argc ? 1 : 0;
1.38      christos 2079: }
                   2080:
1.51      christos 2081: int
                   2082: rl_variable_bind(const char *var, const char *value)
                   2083: {
                   2084:        /*
                   2085:         * The proper return value is undocument, but this is what the
                   2086:         * readline source seems to do.
                   2087:         */
1.106     christos 2088:        return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
1.51      christos 2089: }
                   2090:
1.38      christos 2091: void
                   2092: rl_stuff_char(int c)
                   2093: {
                   2094:        char buf[2];
                   2095:
1.99      christos 2096:        buf[0] = (char)c;
1.38      christos 2097:        buf[1] = '\0';
                   2098:        el_insertstr(e, buf);
                   2099: }
                   2100:
                   2101: static int
                   2102: _rl_event_read_char(EditLine *el, char *cp)
                   2103: {
1.80      christos 2104:        int     n;
                   2105:        ssize_t num_read = 0;
1.38      christos 2106:
1.76      christos 2107:        *cp = '\0';
1.38      christos 2108:        while (rl_event_hook) {
                   2109:
                   2110:                (*rl_event_hook)();
                   2111:
                   2112: #if defined(FIONREAD)
                   2113:                if (ioctl(el->el_infd, FIONREAD, &n) < 0)
1.96      christos 2114:                        return -1;
1.38      christos 2115:                if (n)
1.98      christos 2116:                        num_read = read(el->el_infd, cp, (size_t)1);
1.38      christos 2117:                else
                   2118:                        num_read = 0;
                   2119: #elif defined(F_SETFL) && defined(O_NDELAY)
                   2120:                if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
1.96      christos 2121:                        return -1;
1.38      christos 2122:                if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
1.96      christos 2123:                        return -1;
1.38      christos 2124:                num_read = read(el->el_infd, cp, 1);
                   2125:                if (fcntl(el->el_infd, F_SETFL, n))
1.96      christos 2126:                        return -1;
1.38      christos 2127: #else
                   2128:                /* not non-blocking, but what you gonna do? */
                   2129:                num_read = read(el->el_infd, cp, 1);
1.96      christos 2130:                return -1;
1.38      christos 2131: #endif
                   2132:
                   2133:                if (num_read < 0 && errno == EAGAIN)
                   2134:                        continue;
                   2135:                if (num_read == 0)
                   2136:                        continue;
                   2137:                break;
                   2138:        }
                   2139:        if (!rl_event_hook)
                   2140:                el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
1.80      christos 2141:        return (int)num_read;
1.1       christos 2142: }
1.49      christos 2143:
                   2144: static void
                   2145: _rl_update_pos(void)
                   2146: {
                   2147:        const LineInfo *li = el_line(e);
                   2148:
1.80      christos 2149:        rl_point = (int)(li->cursor - li->buffer);
                   2150:        rl_end = (int)(li->lastchar - li->buffer);
1.49      christos 2151: }
1.70      christos 2152:
                   2153: void
                   2154: rl_get_screen_size(int *rows, int *cols)
                   2155: {
                   2156:        if (rows)
1.107     christos 2157:                el_get(e, EL_GETTC, "li", rows, (void *)0);
1.70      christos 2158:        if (cols)
1.107     christos 2159:                el_get(e, EL_GETTC, "co", cols, (void *)0);
1.70      christos 2160: }
                   2161:
                   2162: void
                   2163: rl_set_screen_size(int rows, int cols)
                   2164: {
                   2165:        char buf[64];
                   2166:        (void)snprintf(buf, sizeof(buf), "%d", rows);
1.106     christos 2167:        el_set(e, EL_SETTC, "li", buf, NULL);
1.70      christos 2168:        (void)snprintf(buf, sizeof(buf), "%d", cols);
1.106     christos 2169:        el_set(e, EL_SETTC, "co", buf, NULL);
1.70      christos 2170: }
                   2171:
1.71      christos 2172: char **
                   2173: rl_completion_matches(const char *str, rl_compentry_func_t *fun)
                   2174: {
                   2175:        size_t len, max, i, j, min;
                   2176:        char **list, *match, *a, *b;
                   2177:
                   2178:        len = 1;
                   2179:        max = 10;
1.95      christos 2180:        if ((list = el_malloc(max * sizeof(*list))) == NULL)
1.71      christos 2181:                return NULL;
                   2182:
                   2183:        while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
1.83      christos 2184:                list[len++] = match;
1.71      christos 2185:                if (len == max) {
                   2186:                        char **nl;
                   2187:                        max += 10;
1.95      christos 2188:                        if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL)
1.71      christos 2189:                                goto out;
                   2190:                        list = nl;
                   2191:                }
                   2192:        }
                   2193:        if (len == 1)
                   2194:                goto out;
                   2195:        list[len] = NULL;
                   2196:        if (len == 2) {
                   2197:                if ((list[0] = strdup(list[1])) == NULL)
                   2198:                        goto out;
                   2199:                return list;
                   2200:        }
                   2201:        qsort(&list[1], len - 1, sizeof(*list),
                   2202:            (int (*)(const void *, const void *)) strcmp);
1.119     christos 2203:        min = SIZE_MAX;
1.71      christos 2204:        for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
                   2205:                b = list[i + 1];
                   2206:                for (j = 0; a[j] && a[j] == b[j]; j++)
                   2207:                        continue;
                   2208:                if (min > j)
                   2209:                        min = j;
                   2210:        }
                   2211:        if (min == 0 && *str) {
                   2212:                if ((list[0] = strdup(str)) == NULL)
                   2213:                        goto out;
                   2214:        } else {
1.95      christos 2215:                if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL)
1.71      christos 2216:                        goto out;
                   2217:                (void)memcpy(list[0], list[1], min);
                   2218:                list[0][min] = '\0';
                   2219:        }
                   2220:        return list;
1.125   ! christos 2221:
1.71      christos 2222: out:
1.95      christos 2223:        el_free(list);
1.71      christos 2224:        return NULL;
                   2225: }
                   2226:
1.70      christos 2227: char *
                   2228: rl_filename_completion_function (const char *text, int state)
                   2229: {
                   2230:        return fn_filename_completion_function(text, state);
                   2231: }
                   2232:
1.73      christos 2233: void
                   2234: rl_forced_update_display(void)
                   2235: {
1.74      christos 2236:        el_set(e, EL_REFRESH);
1.73      christos 2237: }
                   2238:
1.70      christos 2239: int
                   2240: _rl_abort_internal(void)
                   2241: {
                   2242:        el_beep(e);
                   2243:        longjmp(topbuf, 1);
                   2244:        /*NOTREACHED*/
                   2245: }
                   2246:
                   2247: int
                   2248: _rl_qsort_string_compare(char **s1, char **s2)
                   2249: {
                   2250:        return strcoll(*s1, *s2);
                   2251: }
                   2252:
1.85      christos 2253: HISTORY_STATE *
                   2254: history_get_history_state(void)
                   2255: {
                   2256:        HISTORY_STATE *hs;
                   2257:
1.95      christos 2258:        if ((hs = el_malloc(sizeof(*hs))) == NULL)
1.96      christos 2259:                return NULL;
1.85      christos 2260:        hs->length = history_length;
1.96      christos 2261:        return hs;
1.85      christos 2262: }
                   2263:
1.70      christos 2264: int
                   2265: /*ARGSUSED*/
1.97      christos 2266: rl_kill_text(int from __attribute__((__unused__)),
                   2267:     int to __attribute__((__unused__)))
1.70      christos 2268: {
                   2269:        return 0;
                   2270: }
                   2271:
                   2272: Keymap
                   2273: rl_make_bare_keymap(void)
                   2274: {
                   2275:        return NULL;
                   2276: }
                   2277:
                   2278: Keymap
                   2279: rl_get_keymap(void)
                   2280: {
                   2281:        return NULL;
                   2282: }
                   2283:
                   2284: void
                   2285: /*ARGSUSED*/
1.97      christos 2286: rl_set_keymap(Keymap k __attribute__((__unused__)))
1.70      christos 2287: {
                   2288: }
                   2289:
                   2290: int
                   2291: /*ARGSUSED*/
1.97      christos 2292: rl_generic_bind(int type __attribute__((__unused__)),
                   2293:     const char * keyseq __attribute__((__unused__)),
                   2294:     const char * data __attribute__((__unused__)),
                   2295:     Keymap k __attribute__((__unused__)))
1.70      christos 2296: {
                   2297:        return 0;
                   2298: }
                   2299:
                   2300: int
                   2301: /*ARGSUSED*/
1.97      christos 2302: rl_bind_key_in_map(int key __attribute__((__unused__)),
                   2303:     rl_command_func_t *fun __attribute__((__unused__)),
                   2304:     Keymap k __attribute__((__unused__)))
1.70      christos 2305: {
                   2306:        return 0;
                   2307: }
1.85      christos 2308:
                   2309: /* unsupported, but needed by python */
                   2310: void
                   2311: rl_cleanup_after_signal(void)
                   2312: {
                   2313: }
1.90      christos 2314:
                   2315: int
                   2316: rl_on_new_line(void)
                   2317: {
                   2318:        return 0;
                   2319: }
1.105     christos 2320:
                   2321: void
                   2322: rl_free_line_state(void)
                   2323: {
                   2324: }
1.118     christos 2325:
                   2326: int
                   2327: /*ARGSUSED*/
1.120     christos 2328: rl_set_keyboard_input_timeout(int u __attribute__((__unused__)))
1.118     christos 2329: {
                   2330:        return 0;
                   2331: }

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