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Annotation of src/lib/libedit/readline.c, Revision 1.110

1.110   ! christos    1: /*     $NetBSD: readline.c,v 1.109 2013/08/28 08:05:21 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)
1.110   ! christos   34: __RCSID("$NetBSD: readline.c,v 1.109 2013/08/28 08:05:21 christos Exp $");
1.1       christos   35: #endif /* not lint && not SCCSID */
                     36:
                     37: #include <sys/types.h>
                     38: #include <sys/stat.h>
                     39: #include <stdio.h>
                     40: #include <dirent.h>
                     41: #include <string.h>
                     42: #include <pwd.h>
                     43: #include <ctype.h>
                     44: #include <stdlib.h>
                     45: #include <unistd.h>
                     46: #include <limits.h>
1.38      christos   47: #include <errno.h>
                     48: #include <fcntl.h>
1.70      christos   49: #include <setjmp.h>
1.35      christos   50: #include <vis.h>
1.97      christos   51:
1.79      sketch     52: #include "readline/readline.h"
1.45      christos   53: #include "el.h"
                     54: #include "fcns.h"              /* for EL_NUM_FCNS */
1.1       christos   55: #include "histedit.h"
1.53      dsl        56: #include "filecomplete.h"
1.1       christos   57:
1.68      christos   58: void rl_prep_terminal(int);
                     59: void rl_deprep_terminal(void);
                     60:
1.1       christos   61: /* for rl_complete() */
1.40      christos   62: #define TAB            '\r'
1.1       christos   63:
                     64: /* see comment at the #ifdef for sense of this */
1.40      christos   65: /* #define GDB_411_HACK */
1.1       christos   66:
                     67: /* readline compatibility stuff - look at readline sources/documentation */
                     68: /* to see what these variables mean */
1.11      lukem      69: const char *rl_library_version = "EditLine wrapper";
1.85      christos   70: int rl_readline_version = RL_READLINE_VERSION;
1.20      christos   71: static char empty[] = { '\0' };
                     72: static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
                     73: static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
                     74:     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
                     75: char *rl_readline_name = empty;
1.11      lukem      76: FILE *rl_instream = NULL;
                     77: FILE *rl_outstream = NULL;
                     78: int rl_point = 0;
                     79: int rl_end = 0;
                     80: char *rl_line_buffer = NULL;
1.55      agc        81: VCPFunction *rl_linefunc = NULL;
1.38      christos   82: int rl_done = 0;
                     83: VFunction *rl_event_hook = NULL;
1.70      christos   84: KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
                     85:     emacs_meta_keymap,
                     86:     emacs_ctlx_keymap;
1.108     christos   87: /*
                     88:  * The following is not implemented; we always catch signals in the
                     89:  * libedit fashion: set handlers on entry to el_gets() and clear them
                     90:  * on the way out. This simplistic approach works for most cases; if
                     91:  * it does not work for your application, please let us know.
                     92:  */
                     93: int rl_catch_signals = 1;
                     94: int rl_catch_sigwinch = 1;
1.11      lukem      95:
                     96: int history_base = 1;          /* probably never subject to change */
                     97: int history_length = 0;
                     98: int max_input_history = 0;
                     99: char history_expansion_char = '!';
                    100: char history_subst_char = '^';
1.20      christos  101: char *history_no_expand_chars = expand_chars;
1.11      lukem     102: Function *history_inhibit_expansion_function = NULL;
1.40      christos  103: char *history_arg_extract(int start, int end, const char *str);
1.11      lukem     104:
                    105: int rl_inhibit_completion = 0;
                    106: int rl_attempted_completion_over = 0;
1.20      christos  107: char *rl_basic_word_break_characters = break_chars;
1.11      lukem     108: char *rl_completer_word_break_characters = NULL;
                    109: char *rl_completer_quote_characters = NULL;
1.34      christos  110: Function *rl_completion_entry_function = NULL;
1.103     christos  111: char *(*rl_completion_word_break_hook)(void) = NULL;
1.11      lukem     112: CPPFunction *rl_attempted_completion_function = NULL;
1.32      christos  113: Function *rl_pre_input_hook = NULL;
                    114: Function *rl_startup1_hook = NULL;
1.72      christos  115: int (*rl_getc_function)(FILE *) = NULL;
1.32      christos  116: char *rl_terminal_name = NULL;
                    117: int rl_already_prompted = 0;
                    118: int rl_filename_completion_desired = 0;
                    119: int rl_ignore_completion_duplicates = 0;
1.70      christos  120: int readline_echoing_p = 1;
                    121: int _rl_print_completions_horizontally = 0;
1.32      christos  122: VFunction *rl_redisplay_function = NULL;
1.33      christos  123: Function *rl_startup_hook = NULL;
1.34      christos  124: VFunction *rl_completion_display_matches_hook = NULL;
1.68      christos  125: VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
                    126: VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
1.85      christos  127: KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
1.1       christos  128:
1.12      jdolecek  129: /*
1.32      christos  130:  * The current prompt string.
                    131:  */
                    132: char *rl_prompt = NULL;
                    133: /*
1.12      jdolecek  134:  * This is set to character indicating type of completion being done by
                    135:  * rl_complete_internal(); this is available for application completion
                    136:  * functions.
                    137:  */
                    138: int rl_completion_type = 0;
                    139:
                    140: /*
                    141:  * If more than this number of items results from query for possible
                    142:  * completions, we ask user if they are sure to really display the list.
                    143:  */
                    144: int rl_completion_query_items = 100;
                    145:
                    146: /*
1.15      jdolecek  147:  * List of characters which are word break characters, but should be left
                    148:  * in the parsed text when it is passed to the completion function.
                    149:  * Shell uses this to help determine what kind of completing to do.
1.12      jdolecek  150:  */
1.53      dsl       151: char *rl_special_prefixes = NULL;
1.15      jdolecek  152:
                    153: /*
                    154:  * This is the character appended to the completed words if at the end of
                    155:  * the line. Default is ' ' (a space).
                    156:  */
                    157: int rl_completion_append_character = ' ';
                    158:
                    159: /* stuff below is used internally by libedit for readline emulation */
                    160:
1.92      christos  161: static History *h = NULL;
1.1       christos  162: static EditLine *e = NULL;
1.35      christos  163: static Function *map[256];
1.70      christos  164: static jmp_buf topbuf;
1.1       christos  165:
                    166: /* internal functions */
1.11      lukem     167: static unsigned char    _el_rl_complete(EditLine *, int);
1.46      christos  168: static unsigned char    _el_rl_tstp(EditLine *, int);
1.11      lukem     169: static char            *_get_prompt(EditLine *);
1.59      christos  170: static int              _getc_function(EditLine *, char *);
1.11      lukem     171: static HIST_ENTRY      *_move_history(int);
1.40      christos  172: static int              _history_expand_command(const char *, size_t, size_t,
                    173:     char **);
1.11      lukem     174: static char            *_rl_compat_sub(const char *, const char *,
1.40      christos  175:     const char *, int);
1.38      christos  176: static int              _rl_event_read_char(EditLine *, char *);
1.49      christos  177: static void             _rl_update_pos(void);
1.1       christos  178:
1.5       christos  179:
                    180: /* ARGSUSED */
1.1       christos  181: static char *
1.30      christos  182: _get_prompt(EditLine *el __attribute__((__unused__)))
1.1       christos  183: {
1.32      christos  184:        rl_already_prompted = 1;
1.96      christos  185:        return rl_prompt;
1.1       christos  186: }
                    187:
1.11      lukem     188:
1.1       christos  189: /*
                    190:  * generic function for moving around history
                    191:  */
1.2       christos  192: static HIST_ENTRY *
1.11      lukem     193: _move_history(int op)
1.1       christos  194: {
1.92      christos  195:        HistEvent ev;
1.1       christos  196:        static HIST_ENTRY rl_he;
                    197:
1.92      christos  198:        if (history(h, &ev, op) != 0)
1.96      christos  199:                return NULL;
1.1       christos  200:
1.92      christos  201:        rl_he.line = ev.str;
1.40      christos  202:        rl_he.data = NULL;
1.1       christos  203:
1.96      christos  204:        return &rl_he;
1.1       christos  205: }
                    206:
                    207:
1.7       simonb    208: /*
1.59      christos  209:  * read one key from user defined input function
                    210:  */
                    211: static int
1.61      christos  212: /*ARGSUSED*/
1.97      christos  213: _getc_function(EditLine *el __attribute__((__unused__)), char *c)
1.59      christos  214: {
                    215:        int i;
                    216:
1.72      christos  217:        i = (*rl_getc_function)(NULL);
1.59      christos  218:        if (i == -1)
                    219:                return 0;
1.99      christos  220:        *c = (char)i;
1.59      christos  221:        return 1;
                    222: }
                    223:
1.91      christos  224: static void
                    225: _resize_fun(EditLine *el, void *a)
                    226: {
                    227:        const LineInfo *li;
                    228:        char **ap = a;
                    229:
                    230:        li = el_line(el);
                    231:        /* a cheesy way to get rid of const cast. */
1.98      christos  232:        *ap = memchr(li->buffer, *li->buffer, (size_t)1);
1.91      christos  233: }
                    234:
1.85      christos  235: static const char *
                    236: _default_history_file(void)
                    237: {
                    238:        struct passwd *p;
1.109     christos  239:        static char *path;
                    240:        size_t len;
1.85      christos  241:
1.109     christos  242:        if (path)
1.85      christos  243:                return path;
1.109     christos  244:
1.85      christos  245:        if ((p = getpwuid(getuid())) == NULL)
                    246:                return NULL;
1.109     christos  247:
                    248:        len = strlen(p->pw_dir) + sizeof("/.history");
                    249:        if ((path = malloc(len)) == NULL)
                    250:                return NULL;
                    251:
                    252:        (void)snprintf(path, len, "%s/.history", p->pw_dir);
1.85      christos  253:        return path;
                    254: }
1.59      christos  255:
                    256: /*
1.7       simonb    257:  * READLINE compatibility stuff
1.1       christos  258:  */
                    259:
                    260: /*
1.78      christos  261:  * Set the prompt
                    262:  */
                    263: int
                    264: rl_set_prompt(const char *prompt)
                    265: {
1.82      christos  266:        char *p;
                    267:
1.78      christos  268:        if (!prompt)
                    269:                prompt = "";
                    270:        if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
                    271:                return 0;
                    272:        if (rl_prompt)
1.95      christos  273:                el_free(rl_prompt);
1.78      christos  274:        rl_prompt = strdup(prompt);
1.82      christos  275:        if (rl_prompt == NULL)
                    276:                return -1;
                    277:
                    278:        while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
                    279:                *p = RL_PROMPT_START_IGNORE;
                    280:
                    281:        return 0;
1.78      christos  282: }
                    283:
                    284: /*
1.1       christos  285:  * initialize rl compat stuff
                    286:  */
                    287: int
1.11      lukem     288: rl_initialize(void)
1.1       christos  289: {
1.92      christos  290:        HistEvent ev;
1.18      christos  291:        int editmode = 1;
                    292:        struct termios t;
1.1       christos  293:
                    294:        if (e != NULL)
                    295:                el_end(e);
                    296:        if (h != NULL)
1.92      christos  297:                history_end(h);
1.1       christos  298:
                    299:        if (!rl_instream)
                    300:                rl_instream = stdin;
                    301:        if (!rl_outstream)
                    302:                rl_outstream = stdout;
1.18      christos  303:
                    304:        /*
                    305:         * See if we don't really want to run the editor
                    306:         */
                    307:        if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
                    308:                editmode = 0;
                    309:
1.4       christos  310:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.18      christos  311:
                    312:        if (!editmode)
1.92      christos  313:                el_set(e, EL_EDITMODE, 0);
1.1       christos  314:
1.92      christos  315:        h = history_init();
1.1       christos  316:        if (!e || !h)
1.96      christos  317:                return -1;
1.1       christos  318:
1.92      christos  319:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  320:        history_length = 0;
                    321:        max_input_history = INT_MAX;
                    322:        el_set(e, EL_HIST, history, h);
                    323:
1.91      christos  324:        /* Setup resize function */
                    325:        el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
                    326:
1.59      christos  327:        /* setup getc function if valid */
                    328:        if (rl_getc_function)
                    329:                el_set(e, EL_GETCFN, _getc_function);
                    330:
1.1       christos  331:        /* for proper prompt printing in readline() */
1.78      christos  332:        if (rl_set_prompt("") == -1) {
1.92      christos  333:                history_end(h);
1.23      christos  334:                el_end(e);
                    335:                return -1;
                    336:        }
1.82      christos  337:        el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
1.39      christos  338:        el_set(e, EL_SIGNAL, rl_catch_signals);
1.1       christos  339:
                    340:        /* set default mode to "emacs"-style and read setting afterwards */
                    341:        /* so this can be overriden */
                    342:        el_set(e, EL_EDITOR, "emacs");
1.32      christos  343:        if (rl_terminal_name != NULL)
                    344:                el_set(e, EL_TERMINAL, rl_terminal_name);
                    345:        else
                    346:                el_get(e, EL_TERMINAL, &rl_terminal_name);
1.1       christos  347:
1.12      jdolecek  348:        /*
1.35      christos  349:         * Word completion - this has to go AFTER rebinding keys
1.12      jdolecek  350:         * to emacs-style.
                    351:         */
1.1       christos  352:        el_set(e, EL_ADDFN, "rl_complete",
1.35      christos  353:            "ReadLine compatible completion function",
1.11      lukem     354:            _el_rl_complete);
1.1       christos  355:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
1.46      christos  356:
                    357:        /*
                    358:         * Send TSTP when ^Z is pressed.
                    359:         */
                    360:        el_set(e, EL_ADDFN, "rl_tstp",
                    361:            "ReadLine compatible suspend function",
                    362:            _el_rl_tstp);
                    363:        el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
1.12      jdolecek  364:
1.1       christos  365:        /* read settings from configuration file */
                    366:        el_source(e, NULL);
                    367:
1.12      jdolecek  368:        /*
                    369:         * Unfortunately, some applications really do use rl_point
                    370:         * and rl_line_buffer directly.
                    371:         */
1.91      christos  372:        _resize_fun(e, &rl_line_buffer);
1.49      christos  373:        _rl_update_pos();
1.1       christos  374:
1.32      christos  375:        if (rl_startup_hook)
                    376:                (*rl_startup_hook)(NULL, 0);
                    377:
1.96      christos  378:        return 0;
1.1       christos  379: }
                    380:
1.11      lukem     381:
1.1       christos  382: /*
                    383:  * read one line from input stream and return it, chomping
                    384:  * trailing newline (if there is any)
                    385:  */
                    386: char *
1.70      christos  387: readline(const char *p)
1.1       christos  388: {
1.92      christos  389:        HistEvent ev;
1.70      christos  390:        const char * volatile prompt = p;
1.3       thorpej   391:        int count;
1.1       christos  392:        const char *ret;
1.20      christos  393:        char *buf;
1.38      christos  394:        static int used_event_hook;
1.1       christos  395:
                    396:        if (e == NULL || h == NULL)
                    397:                rl_initialize();
                    398:
1.38      christos  399:        rl_done = 0;
                    400:
1.70      christos  401:        (void)setjmp(topbuf);
                    402:
1.9       jdolecek  403:        /* update prompt accordingly to what has been passed */
1.78      christos  404:        if (rl_set_prompt(prompt) == -1)
                    405:                return NULL;
1.32      christos  406:
                    407:        if (rl_pre_input_hook)
                    408:                (*rl_pre_input_hook)(NULL, 0);
                    409:
1.38      christos  410:        if (rl_event_hook && !(e->el_flags&NO_TTY)) {
                    411:                el_set(e, EL_GETCFN, _rl_event_read_char);
                    412:                used_event_hook = 1;
                    413:        }
                    414:
                    415:        if (!rl_event_hook && used_event_hook) {
                    416:                el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
                    417:                used_event_hook = 0;
                    418:        }
                    419:
1.32      christos  420:        rl_already_prompted = 0;
                    421:
1.1       christos  422:        /* get one line from input stream */
                    423:        ret = el_gets(e, &count);
                    424:
                    425:        if (ret && count > 0) {
1.5       christos  426:                int lastidx;
1.1       christos  427:
1.20      christos  428:                buf = strdup(ret);
1.23      christos  429:                if (buf == NULL)
                    430:                        return NULL;
1.1       christos  431:                lastidx = count - 1;
1.20      christos  432:                if (buf[lastidx] == '\n')
                    433:                        buf[lastidx] = '\0';
1.1       christos  434:        } else
1.20      christos  435:                buf = NULL;
1.1       christos  436:
1.92      christos  437:        history(h, &ev, H_GETSIZE);
1.1       christos  438:        history_length = ev.num;
                    439:
1.20      christos  440:        return buf;
1.1       christos  441: }
                    442:
                    443: /*
                    444:  * history functions
                    445:  */
                    446:
                    447: /*
                    448:  * is normally called before application starts to use
                    449:  * history expansion functions
                    450:  */
                    451: void
1.11      lukem     452: using_history(void)
1.1       christos  453: {
                    454:        if (h == NULL || e == NULL)
                    455:                rl_initialize();
                    456: }
                    457:
1.11      lukem     458:
1.1       christos  459: /*
                    460:  * substitute ``what'' with ``with'', returning resulting string; if
1.29      wiz       461:  * globally == 1, substitutes all occurrences of what, otherwise only the
1.1       christos  462:  * first one
                    463:  */
1.11      lukem     464: static char *
                    465: _rl_compat_sub(const char *str, const char *what, const char *with,
                    466:     int globally)
                    467: {
1.40      christos  468:        const   char    *s;
                    469:        char    *r, *result;
                    470:        size_t  len, with_len, what_len;
1.1       christos  471:
1.40      christos  472:        len = strlen(str);
                    473:        with_len = strlen(with);
                    474:        what_len = strlen(what);
                    475:
                    476:        /* calculate length we need for result */
                    477:        s = str;
                    478:        while (*s) {
                    479:                if (*s == *what && !strncmp(s, what, what_len)) {
                    480:                        len += with_len - what_len;
                    481:                        if (!globally)
                    482:                                break;
                    483:                        s += what_len;
                    484:                } else
                    485:                        s++;
                    486:        }
1.95      christos  487:        r = result = el_malloc((len + 1) * sizeof(*r));
1.23      christos  488:        if (result == NULL)
                    489:                return NULL;
1.40      christos  490:        s = str;
                    491:        while (*s) {
                    492:                if (*s == *what && !strncmp(s, what, what_len)) {
                    493:                        (void)strncpy(r, with, with_len);
                    494:                        r += with_len;
                    495:                        s += what_len;
                    496:                        if (!globally) {
                    497:                                (void)strcpy(r, s);
1.96      christos  498:                                return result;
1.1       christos  499:                        }
1.40      christos  500:                } else
                    501:                        *r++ = *s++;
                    502:        }
1.76      christos  503:        *r = '\0';
1.96      christos  504:        return result;
1.40      christos  505: }
                    506:
                    507: static char    *last_search_pat;       /* last !?pat[?] search pattern */
                    508: static char    *last_search_match;     /* last !?pat[?] that matched */
                    509:
                    510: const char *
                    511: get_history_event(const char *cmd, int *cindex, int qchar)
                    512: {
                    513:        int idx, sign, sub, num, begin, ret;
                    514:        size_t len;
                    515:        char    *pat;
                    516:        const char *rptr;
1.92      christos  517:        HistEvent ev;
1.40      christos  518:
                    519:        idx = *cindex;
                    520:        if (cmd[idx++] != history_expansion_char)
1.96      christos  521:                return NULL;
1.40      christos  522:
                    523:        /* find out which event to take */
1.76      christos  524:        if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
1.92      christos  525:                if (history(h, &ev, H_FIRST) != 0)
1.96      christos  526:                        return NULL;
1.40      christos  527:                *cindex = cmd[idx]? (idx + 1):idx;
1.92      christos  528:                return ev.str;
1.40      christos  529:        }
                    530:        sign = 0;
                    531:        if (cmd[idx] == '-') {
                    532:                sign = 1;
                    533:                idx++;
                    534:        }
                    535:
                    536:        if ('0' <= cmd[idx] && cmd[idx] <= '9') {
                    537:                HIST_ENTRY *rl_he;
                    538:
                    539:                num = 0;
                    540:                while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
                    541:                        num = num * 10 + cmd[idx] - '0';
                    542:                        idx++;
                    543:                }
                    544:                if (sign)
                    545:                        num = history_length - num + 1;
                    546:
                    547:                if (!(rl_he = history_get(num)))
1.96      christos  548:                        return NULL;
1.40      christos  549:
                    550:                *cindex = idx;
1.96      christos  551:                return rl_he->line;
1.40      christos  552:        }
                    553:        sub = 0;
                    554:        if (cmd[idx] == '?') {
                    555:                sub = 1;
                    556:                idx++;
                    557:        }
                    558:        begin = idx;
                    559:        while (cmd[idx]) {
                    560:                if (cmd[idx] == '\n')
                    561:                        break;
                    562:                if (sub && cmd[idx] == '?')
                    563:                        break;
                    564:                if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
                    565:                                    || cmd[idx] == '\t' || cmd[idx] == qchar))
                    566:                        break;
                    567:                idx++;
                    568:        }
1.99      christos  569:        len = (size_t)idx - (size_t)begin;
1.40      christos  570:        if (sub && cmd[idx] == '?')
                    571:                idx++;
                    572:        if (sub && len == 0 && last_search_pat && *last_search_pat)
                    573:                pat = last_search_pat;
                    574:        else if (len == 0)
1.96      christos  575:                return NULL;
1.40      christos  576:        else {
1.95      christos  577:                if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL)
1.40      christos  578:                        return NULL;
                    579:                (void)strncpy(pat, cmd + begin, len);
                    580:                pat[len] = '\0';
                    581:        }
                    582:
1.92      christos  583:        if (history(h, &ev, H_CURR) != 0) {
1.40      christos  584:                if (pat != last_search_pat)
1.95      christos  585:                        el_free(pat);
1.96      christos  586:                return NULL;
1.40      christos  587:        }
                    588:        num = ev.num;
                    589:
                    590:        if (sub) {
                    591:                if (pat != last_search_pat) {
                    592:                        if (last_search_pat)
1.95      christos  593:                                el_free(last_search_pat);
1.40      christos  594:                        last_search_pat = pat;
1.1       christos  595:                }
1.40      christos  596:                ret = history_search(pat, -1);
                    597:        } else
                    598:                ret = history_search_prefix(pat, -1);
                    599:
                    600:        if (ret == -1) {
                    601:                /* restore to end of list on failed search */
1.92      christos  602:                history(h, &ev, H_FIRST);
1.40      christos  603:                (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
                    604:                if (pat != last_search_pat)
1.95      christos  605:                        el_free(pat);
1.96      christos  606:                return NULL;
1.40      christos  607:        }
                    608:
                    609:        if (sub && len) {
                    610:                if (last_search_match && last_search_match != pat)
1.95      christos  611:                        el_free(last_search_match);
1.40      christos  612:                last_search_match = pat;
                    613:        }
                    614:
                    615:        if (pat != last_search_pat)
1.95      christos  616:                el_free(pat);
1.40      christos  617:
1.92      christos  618:        if (history(h, &ev, H_CURR) != 0)
1.96      christos  619:                return NULL;
1.40      christos  620:        *cindex = idx;
1.92      christos  621:        rptr = ev.str;
1.40      christos  622:
                    623:        /* roll back to original position */
1.92      christos  624:        (void)history(h, &ev, H_SET, num);
1.1       christos  625:
1.40      christos  626:        return rptr;
1.1       christos  627: }
                    628:
                    629: /*
                    630:  * the real function doing history expansion - takes as argument command
                    631:  * to do and data upon which the command should be executed
                    632:  * does expansion the way I've understood readline documentation
                    633:  *
                    634:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    635:  * should be only printed and not executed; in case of error,
                    636:  * returns -1 and *result points to NULL
                    637:  * it's callers responsibility to free() string returned in *result
                    638:  */
                    639: static int
1.40      christos  640: _history_expand_command(const char *command, size_t offs, size_t cmdlen,
                    641:     char **result)
1.11      lukem     642: {
1.40      christos  643:        char *tmp, *search = NULL, *aptr;
                    644:        const char *ptr, *cmd;
1.11      lukem     645:        static char *from = NULL, *to = NULL;
1.40      christos  646:        int start, end, idx, has_mods = 0;
                    647:        int p_on = 0, g_on = 0;
1.1       christos  648:
                    649:        *result = NULL;
1.40      christos  650:        aptr = NULL;
1.41      christos  651:        ptr = NULL;
1.1       christos  652:
1.40      christos  653:        /* First get event specifier */
                    654:        idx = 0;
1.1       christos  655:
1.40      christos  656:        if (strchr(":^*$", command[offs + 1])) {
                    657:                char str[4];
                    658:                /*
                    659:                * "!:" is shorthand for "!!:".
                    660:                * "!^", "!*" and "!$" are shorthand for
                    661:                * "!!:^", "!!:*" and "!!:$" respectively.
                    662:                */
                    663:                str[0] = str[1] = '!';
                    664:                str[2] = '0';
                    665:                ptr = get_history_event(str, &idx, 0);
                    666:                idx = (command[offs + 1] == ':')? 1:0;
                    667:                has_mods = 1;
1.1       christos  668:        } else {
1.40      christos  669:                if (command[offs + 1] == '#') {
                    670:                        /* use command so far */
1.95      christos  671:                        if ((aptr = el_malloc((offs + 1) * sizeof(*aptr)))
                    672:                            == NULL)
1.40      christos  673:                                return -1;
                    674:                        (void)strncpy(aptr, command, offs);
                    675:                        aptr[offs] = '\0';
                    676:                        idx = 1;
1.1       christos  677:                } else {
1.40      christos  678:                        int     qchar;
                    679:
                    680:                        qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
                    681:                        ptr = get_history_event(command + offs, &idx, qchar);
                    682:                }
1.99      christos  683:                has_mods = command[offs + (size_t)idx] == ':';
1.40      christos  684:        }
1.1       christos  685:
1.40      christos  686:        if (ptr == NULL && aptr == NULL)
1.96      christos  687:                return -1;
1.1       christos  688:
1.40      christos  689:        if (!has_mods) {
1.85      christos  690:                *result = strdup(aptr ? aptr : ptr);
1.40      christos  691:                if (aptr)
1.95      christos  692:                        el_free(aptr);
1.85      christos  693:                if (*result == NULL)
                    694:                        return -1;
1.96      christos  695:                return 1;
1.40      christos  696:        }
                    697:
                    698:        cmd = command + offs + idx + 1;
                    699:
                    700:        /* Now parse any word designators */
                    701:
                    702:        if (*cmd == '%')        /* last word matched by ?pat? */
                    703:                tmp = strdup(last_search_match? last_search_match:"");
                    704:        else if (strchr("^*$-0123456789", *cmd)) {
                    705:                start = end = -1;
                    706:                if (*cmd == '^')
                    707:                        start = end = 1, cmd++;
                    708:                else if (*cmd == '$')
                    709:                        start = -1, cmd++;
                    710:                else if (*cmd == '*')
                    711:                        start = 1, cmd++;
                    712:               else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
                    713:                        start = 0;
                    714:                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    715:                                start = start * 10 + *cmd++ - '0';
                    716:
                    717:                        if (*cmd == '-') {
                    718:                                if (isdigit((unsigned char) cmd[1])) {
                    719:                                        cmd++;
                    720:                                        end = 0;
                    721:                                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    722:                                                end = end * 10 + *cmd++ - '0';
                    723:                                } else if (cmd[1] == '$') {
                    724:                                        cmd += 2;
                    725:                                        end = -1;
                    726:                                } else {
                    727:                                        cmd++;
                    728:                                        end = -2;
                    729:                                }
                    730:                        } else if (*cmd == '*')
                    731:                                end = -1, cmd++;
1.1       christos  732:                        else
1.40      christos  733:                                end = start;
                    734:                }
                    735:                tmp = history_arg_extract(start, end, aptr? aptr:ptr);
                    736:                if (tmp == NULL) {
                    737:                        (void)fprintf(rl_outstream, "%s: Bad word specifier",
                    738:                            command + offs + idx);
                    739:                        if (aptr)
1.95      christos  740:                                el_free(aptr);
1.96      christos  741:                        return -1;
1.40      christos  742:                }
                    743:        } else
                    744:                tmp = strdup(aptr? aptr:ptr);
1.1       christos  745:
1.40      christos  746:        if (aptr)
1.95      christos  747:                el_free(aptr);
1.1       christos  748:
1.77      lukem     749:        if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
1.40      christos  750:                *result = tmp;
1.96      christos  751:                return 1;
1.1       christos  752:        }
                    753:
                    754:        for (; *cmd; cmd++) {
                    755:                if (*cmd == ':')
                    756:                        continue;
1.40      christos  757:                else if (*cmd == 'h') {         /* remove trailing path */
                    758:                        if ((aptr = strrchr(tmp, '/')) != NULL)
1.76      christos  759:                                *aptr = '\0';
1.40      christos  760:                } else if (*cmd == 't') {       /* remove leading path */
                    761:                        if ((aptr = strrchr(tmp, '/')) != NULL) {
                    762:                                aptr = strdup(aptr + 1);
1.95      christos  763:                                el_free(tmp);
1.40      christos  764:                                tmp = aptr;
                    765:                        }
                    766:                } else if (*cmd == 'r') {       /* remove trailing suffix */
                    767:                        if ((aptr = strrchr(tmp, '.')) != NULL)
1.76      christos  768:                                *aptr = '\0';
1.40      christos  769:                } else if (*cmd == 'e') {       /* remove all but suffix */
                    770:                        if ((aptr = strrchr(tmp, '.')) != NULL) {
                    771:                                aptr = strdup(aptr);
1.95      christos  772:                                el_free(tmp);
1.40      christos  773:                                tmp = aptr;
                    774:                        }
                    775:                } else if (*cmd == 'p')         /* print only */
                    776:                        p_on = 1;
1.1       christos  777:                else if (*cmd == 'g')
                    778:                        g_on = 2;
                    779:                else if (*cmd == 's' || *cmd == '&') {
1.11      lukem     780:                        char *what, *with, delim;
1.30      christos  781:                        size_t len, from_len;
1.5       christos  782:                        size_t size;
1.1       christos  783:
                    784:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    785:                                continue;
                    786:                        else if (*cmd == 's') {
                    787:                                delim = *(++cmd), cmd++;
                    788:                                size = 16;
1.95      christos  789:                                what = el_realloc(from, size * sizeof(*what));
1.23      christos  790:                                if (what == NULL) {
1.95      christos  791:                                        el_free(from);
                    792:                                        el_free(tmp);
1.28      christos  793:                                        return 0;
1.23      christos  794:                                }
1.1       christos  795:                                len = 0;
                    796:                                for (; *cmd && *cmd != delim; cmd++) {
1.40      christos  797:                                        if (*cmd == '\\' && cmd[1] == delim)
1.1       christos  798:                                                cmd++;
1.23      christos  799:                                        if (len >= size) {
                    800:                                                char *nwhat;
1.95      christos  801:                                                nwhat = el_realloc(what,
                    802:                                                    (size <<= 1) *
                    803:                                                    sizeof(*nwhat));
1.23      christos  804:                                                if (nwhat == NULL) {
1.95      christos  805:                                                        el_free(what);
                    806:                                                        el_free(tmp);
1.28      christos  807:                                                        return 0;
1.23      christos  808:                                                }
                    809:                                                what = nwhat;
                    810:                                        }
1.1       christos  811:                                        what[len++] = *cmd;
                    812:                                }
                    813:                                what[len] = '\0';
                    814:                                from = what;
                    815:                                if (*what == '\0') {
1.95      christos  816:                                        el_free(what);
1.23      christos  817:                                        if (search) {
1.1       christos  818:                                                from = strdup(search);
1.62      christos  819:                                                if (from == NULL) {
1.95      christos  820:                                                        el_free(tmp);
1.28      christos  821:                                                        return 0;
1.62      christos  822:                                                }
1.23      christos  823:                                        } else {
1.1       christos  824:                                                from = NULL;
1.95      christos  825:                                                el_free(tmp);
1.96      christos  826:                                                return -1;
1.1       christos  827:                                        }
                    828:                                }
                    829:                                cmd++;  /* shift after delim */
                    830:                                if (!*cmd)
                    831:                                        continue;
                    832:
                    833:                                size = 16;
1.95      christos  834:                                with = el_realloc(to, size * sizeof(*with));
1.23      christos  835:                                if (with == NULL) {
1.95      christos  836:                                        el_free(to);
                    837:                                        el_free(tmp);
1.23      christos  838:                                        return -1;
                    839:                                }
1.1       christos  840:                                len = 0;
                    841:                                from_len = strlen(from);
                    842:                                for (; *cmd && *cmd != delim; cmd++) {
                    843:                                        if (len + from_len + 1 >= size) {
1.23      christos  844:                                                char *nwith;
1.1       christos  845:                                                size += from_len + 1;
1.95      christos  846:                                                nwith = el_realloc(with,
                    847:                                                    size * sizeof(*nwith));
1.23      christos  848:                                                if (nwith == NULL) {
1.95      christos  849:                                                        el_free(with);
                    850:                                                        el_free(tmp);
1.23      christos  851:                                                        return -1;
                    852:                                                }
                    853:                                                with = nwith;
1.1       christos  854:                                        }
                    855:                                        if (*cmd == '&') {
                    856:                                                /* safe */
1.40      christos  857:                                                (void)strcpy(&with[len], from);
1.1       christos  858:                                                len += from_len;
                    859:                                                continue;
                    860:                                        }
                    861:                                        if (*cmd == '\\'
                    862:                                            && (*(cmd + 1) == delim
                    863:                                                || *(cmd + 1) == '&'))
                    864:                                                cmd++;
                    865:                                        with[len++] = *cmd;
                    866:                                }
                    867:                                with[len] = '\0';
                    868:                                to = with;
                    869:                        }
                    870:
1.40      christos  871:                        aptr = _rl_compat_sub(tmp, from, to, g_on);
                    872:                        if (aptr) {
1.95      christos  873:                                el_free(tmp);
1.40      christos  874:                                tmp = aptr;
1.23      christos  875:                        }
1.40      christos  876:                        g_on = 0;
1.1       christos  877:                }
1.5       christos  878:        }
1.40      christos  879:        *result = tmp;
1.96      christos  880:        return p_on? 2:1;
1.1       christos  881: }
                    882:
1.11      lukem     883:
1.1       christos  884: /*
                    885:  * csh-style history expansion
                    886:  */
                    887: int
1.11      lukem     888: history_expand(char *str, char **output)
                    889: {
1.40      christos  890:        int ret = 0;
                    891:        size_t idx, i, size;
                    892:        char *tmp, *result;
1.1       christos  893:
                    894:        if (h == NULL || e == NULL)
                    895:                rl_initialize();
                    896:
1.40      christos  897:        if (history_expansion_char == 0) {
                    898:                *output = strdup(str);
1.96      christos  899:                return 0;
1.40      christos  900:        }
1.1       christos  901:
1.40      christos  902:        *output = NULL;
1.1       christos  903:        if (str[0] == history_subst_char) {
                    904:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
1.100     christos  905:                *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output));
1.40      christos  906:                if (*output == NULL)
                    907:                        return 0;
                    908:                (*output)[0] = (*output)[1] = history_expansion_char;
                    909:                (*output)[2] = ':';
                    910:                (*output)[3] = 's';
                    911:                (void)strcpy((*output) + 4, str);
                    912:                str = *output;
                    913:        } else {
                    914:                *output = strdup(str);
                    915:                if (*output == NULL)
                    916:                        return 0;
1.1       christos  917:        }
1.40      christos  918:
1.63      christos  919: #define ADD_STRING(what, len, fr)                                      \
1.1       christos  920:        {                                                               \
1.23      christos  921:                if (idx + len + 1 > size) {                             \
1.95      christos  922:                        char *nresult = el_realloc(result,              \
                    923:                            (size += len + 1) * sizeof(*nresult));      \
1.23      christos  924:                        if (nresult == NULL) {                          \
1.95      christos  925:                                el_free(*output);                       \
1.65      christos  926:                                if (/*CONSTCOND*/fr)                    \
1.95      christos  927:                                        el_free(tmp);                   \
1.28      christos  928:                                return 0;                               \
1.23      christos  929:                        }                                               \
                    930:                        result = nresult;                               \
                    931:                }                                                       \
1.1       christos  932:                (void)strncpy(&result[idx], what, len);                 \
                    933:                idx += len;                                             \
                    934:                result[idx] = '\0';                                     \
                    935:        }
                    936:
                    937:        result = NULL;
                    938:        size = idx = 0;
1.64      christos  939:        tmp = NULL;
1.1       christos  940:        for (i = 0; str[i];) {
1.40      christos  941:                int qchar, loop_again;
                    942:                size_t len, start, j;
1.1       christos  943:
1.40      christos  944:                qchar = 0;
1.1       christos  945:                loop_again = 1;
                    946:                start = j = i;
                    947: loop:
                    948:                for (; str[j]; j++) {
                    949:                        if (str[j] == '\\' &&
                    950:                            str[j + 1] == history_expansion_char) {
1.40      christos  951:                                (void)strcpy(&str[j], &str[j + 1]);
1.1       christos  952:                                continue;
                    953:                        }
                    954:                        if (!loop_again) {
1.40      christos  955:                                if (isspace((unsigned char) str[j])
                    956:                                    || str[j] == qchar)
1.1       christos  957:                                        break;
                    958:                        }
                    959:                        if (str[j] == history_expansion_char
                    960:                            && !strchr(history_no_expand_chars, str[j + 1])
                    961:                            && (!history_inhibit_expansion_function ||
1.40      christos  962:                            (*history_inhibit_expansion_function)(str,
                    963:                            (int)j) == 0))
1.1       christos  964:                                break;
                    965:                }
                    966:
1.40      christos  967:                if (str[j] && loop_again) {
1.1       christos  968:                        i = j;
1.40      christos  969:                        qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
1.1       christos  970:                        j++;
                    971:                        if (str[j] == history_expansion_char)
                    972:                                j++;
                    973:                        loop_again = 0;
                    974:                        goto loop;
                    975:                }
                    976:                len = i - start;
1.64      christos  977:                ADD_STRING(&str[start], len, 0);
1.1       christos  978:
1.40      christos  979:                if (str[i] == '\0' || str[i] != history_expansion_char) {
1.1       christos  980:                        len = j - i;
1.64      christos  981:                        ADD_STRING(&str[i], len, 0);
1.1       christos  982:                        if (start == 0)
1.40      christos  983:                                ret = 0;
1.1       christos  984:                        else
1.40      christos  985:                                ret = 1;
1.1       christos  986:                        break;
                    987:                }
1.40      christos  988:                ret = _history_expand_command (str, i, (j - i), &tmp);
                    989:                if (ret > 0 && tmp) {
                    990:                        len = strlen(tmp);
1.63      christos  991:                        ADD_STRING(tmp, len, 1);
1.66      christos  992:                }
                    993:                if (tmp) {
1.95      christos  994:                        el_free(tmp);
1.64      christos  995:                        tmp = NULL;
1.1       christos  996:                }
                    997:                i = j;
1.40      christos  998:        }
1.1       christos  999:
1.40      christos 1000:        /* ret is 2 for "print only" option */
                   1001:        if (ret == 2) {
                   1002:                add_history(result);
1.1       christos 1003: #ifdef GDB_411_HACK
                   1004:                /* gdb 4.11 has been shipped with readline, where */
                   1005:                /* history_expand() returned -1 when the line     */
                   1006:                /* should not be executed; in readline 2.1+       */
                   1007:                /* it should return 2 in such a case              */
1.40      christos 1008:                ret = -1;
1.1       christos 1009: #endif
                   1010:        }
1.95      christos 1011:        el_free(*output);
1.1       christos 1012:        *output = result;
                   1013:
1.96      christos 1014:        return ret;
1.1       christos 1015: }
                   1016:
1.40      christos 1017: /*
                   1018: * Return a string consisting of arguments of "str" from "start" to "end".
                   1019: */
                   1020: char *
                   1021: history_arg_extract(int start, int end, const char *str)
                   1022: {
                   1023:        size_t  i, len, max;
1.84      christos 1024:        char    **arr, *result = NULL;
1.40      christos 1025:
                   1026:        arr = history_tokenize(str);
                   1027:        if (!arr)
1.84      christos 1028:                return NULL;
                   1029:        if (arr && *arr == NULL)
                   1030:                goto out;
1.40      christos 1031:
                   1032:        for (max = 0; arr[max]; max++)
                   1033:                continue;
                   1034:        max--;
                   1035:
                   1036:        if (start == '$')
1.80      christos 1037:                start = (int)max;
1.40      christos 1038:        if (end == '$')
1.80      christos 1039:                end = (int)max;
1.40      christos 1040:        if (end < 0)
1.80      christos 1041:                end = (int)max + end + 1;
1.40      christos 1042:        if (start < 0)
                   1043:                start = end;
                   1044:
1.84      christos 1045:        if (start < 0 || end < 0 || (size_t)start > max ||
                   1046:            (size_t)end > max || start > end)
                   1047:                goto out;
1.40      christos 1048:
1.99      christos 1049:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++)
1.40      christos 1050:                len += strlen(arr[i]) + 1;
                   1051:        len++;
1.95      christos 1052:        result = el_malloc(len * sizeof(*result));
1.40      christos 1053:        if (result == NULL)
1.84      christos 1054:                goto out;
1.40      christos 1055:
1.99      christos 1056:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++) {
1.40      christos 1057:                (void)strcpy(result + len, arr[i]);
                   1058:                len += strlen(arr[i]);
1.77      lukem    1059:                if (i < (size_t)end)
1.40      christos 1060:                        result[len++] = ' ';
                   1061:        }
1.76      christos 1062:        result[len] = '\0';
1.40      christos 1063:
1.84      christos 1064: out:
1.40      christos 1065:        for (i = 0; arr[i]; i++)
1.95      christos 1066:                el_free(arr[i]);
                   1067:        el_free(arr);
1.40      christos 1068:
1.84      christos 1069:        return result;
1.40      christos 1070: }
1.11      lukem    1071:
1.1       christos 1072: /*
1.40      christos 1073:  * Parse the string into individual tokens,
                   1074:  * similar to how shell would do it.
1.1       christos 1075:  */
                   1076: char **
1.11      lukem    1077: history_tokenize(const char *str)
1.1       christos 1078: {
1.40      christos 1079:        int size = 1, idx = 0, i, start;
1.5       christos 1080:        size_t len;
1.1       christos 1081:        char **result = NULL, *temp, delim = '\0';
                   1082:
1.40      christos 1083:        for (i = 0; str[i];) {
1.4       christos 1084:                while (isspace((unsigned char) str[i]))
1.1       christos 1085:                        i++;
                   1086:                start = i;
1.40      christos 1087:                for (; str[i];) {
1.9       jdolecek 1088:                        if (str[i] == '\\') {
1.14      jdolecek 1089:                                if (str[i+1] != '\0')
1.9       jdolecek 1090:                                        i++;
                   1091:                        } else if (str[i] == delim)
1.1       christos 1092:                                delim = '\0';
                   1093:                        else if (!delim &&
1.11      lukem    1094:                                    (isspace((unsigned char) str[i]) ||
                   1095:                                strchr("()<>;&|$", str[i])))
1.1       christos 1096:                                break;
                   1097:                        else if (!delim && strchr("'`\"", str[i]))
                   1098:                                delim = str[i];
1.40      christos 1099:                        if (str[i])
                   1100:                                i++;
1.1       christos 1101:                }
                   1102:
1.40      christos 1103:                if (idx + 2 >= size) {
1.23      christos 1104:                        char **nresult;
1.1       christos 1105:                        size <<= 1;
1.99      christos 1106:                        nresult = el_realloc(result, (size_t)size * sizeof(*nresult));
1.23      christos 1107:                        if (nresult == NULL) {
1.95      christos 1108:                                el_free(result);
1.23      christos 1109:                                return NULL;
                   1110:                        }
                   1111:                        result = nresult;
1.1       christos 1112:                }
1.99      christos 1113:                len = (size_t)i - (size_t)start;
                   1114:                temp = el_malloc((size_t)(len + 1) * sizeof(*temp));
1.23      christos 1115:                if (temp == NULL) {
1.40      christos 1116:                        for (i = 0; i < idx; i++)
1.95      christos 1117:                                el_free(result[i]);
                   1118:                        el_free(result);
1.23      christos 1119:                        return NULL;
                   1120:                }
1.40      christos 1121:                (void)strncpy(temp, &str[start], len);
1.1       christos 1122:                temp[len] = '\0';
1.40      christos 1123:                result[idx++] = temp;
                   1124:                result[idx] = NULL;
                   1125:                if (str[i])
                   1126:                        i++;
1.1       christos 1127:        }
1.96      christos 1128:        return result;
1.1       christos 1129: }
                   1130:
1.11      lukem    1131:
1.1       christos 1132: /*
                   1133:  * limit size of history record to ``max'' events
                   1134:  */
                   1135: void
1.11      lukem    1136: stifle_history(int max)
1.1       christos 1137: {
1.92      christos 1138:        HistEvent ev;
1.1       christos 1139:
                   1140:        if (h == NULL || e == NULL)
                   1141:                rl_initialize();
                   1142:
1.92      christos 1143:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos 1144:                max_input_history = max;
                   1145: }
                   1146:
1.11      lukem    1147:
1.1       christos 1148: /*
                   1149:  * "unlimit" size of history - set the limit to maximum allowed int value
                   1150:  */
                   1151: int
1.11      lukem    1152: unstifle_history(void)
1.1       christos 1153: {
1.92      christos 1154:        HistEvent ev;
1.1       christos 1155:        int omax;
                   1156:
1.92      christos 1157:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos 1158:        omax = max_input_history;
                   1159:        max_input_history = INT_MAX;
1.96      christos 1160:        return omax;            /* some value _must_ be returned */
1.1       christos 1161: }
                   1162:
1.11      lukem    1163:
1.1       christos 1164: int
1.11      lukem    1165: history_is_stifled(void)
1.1       christos 1166: {
1.11      lukem    1167:
1.1       christos 1168:        /* cannot return true answer */
1.96      christos 1169:        return max_input_history != INT_MAX;
1.1       christos 1170: }
                   1171:
1.85      christos 1172: static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
                   1173:
                   1174: int
                   1175: history_truncate_file (const char *filename, int nlines)
                   1176: {
                   1177:        int ret = 0;
                   1178:        FILE *fp, *tp;
                   1179:        char template[sizeof(_history_tmp_template)];
                   1180:        char buf[4096];
                   1181:        int fd;
                   1182:        char *cp;
                   1183:        off_t off;
                   1184:        int count = 0;
                   1185:        ssize_t left = 0;
                   1186:
                   1187:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1188:                return errno;
                   1189:        if ((fp = fopen(filename, "r+")) == NULL)
                   1190:                return errno;
                   1191:        strcpy(template, _history_tmp_template);
                   1192:        if ((fd = mkstemp(template)) == -1) {
                   1193:                ret = errno;
                   1194:                goto out1;
                   1195:        }
                   1196:
                   1197:        if ((tp = fdopen(fd, "r+")) == NULL) {
                   1198:                close(fd);
                   1199:                ret = errno;
                   1200:                goto out2;
                   1201:        }
                   1202:
                   1203:        for(;;) {
1.98      christos 1204:                if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) {
1.85      christos 1205:                        if (ferror(fp)) {
                   1206:                                ret = errno;
                   1207:                                break;
                   1208:                        }
                   1209:                        if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
                   1210:                            (off_t)-1) {
                   1211:                                ret = errno;
                   1212:                                break;
                   1213:                        }
1.99      christos 1214:                        left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp);
1.85      christos 1215:                        if (ferror(fp)) {
                   1216:                                ret = errno;
                   1217:                                break;
                   1218:                        }
                   1219:                        if (left == 0) {
                   1220:                                count--;
                   1221:                                left = sizeof(buf);
1.98      christos 1222:                        } else if (fwrite(buf, (size_t)left, (size_t)1, tp)
                   1223:                            != 1) {
1.85      christos 1224:                                ret = errno;
                   1225:                                break;
                   1226:                        }
                   1227:                        fflush(tp);
                   1228:                        break;
                   1229:                }
1.98      christos 1230:                if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1231:                        ret = errno;
                   1232:                        break;
                   1233:                }
                   1234:                count++;
                   1235:        }
                   1236:        if (ret)
                   1237:                goto out3;
                   1238:        cp = buf + left - 1;
                   1239:        if(*cp != '\n')
                   1240:                cp++;
                   1241:        for(;;) {
                   1242:                while (--cp >= buf) {
                   1243:                        if (*cp == '\n') {
                   1244:                                if (--nlines == 0) {
                   1245:                                        if (++cp >= buf + sizeof(buf)) {
                   1246:                                                count++;
                   1247:                                                cp = buf;
                   1248:                                        }
                   1249:                                        break;
                   1250:                                }
                   1251:                        }
                   1252:                }
                   1253:                if (nlines <= 0 || count == 0)
                   1254:                        break;
                   1255:                count--;
                   1256:                if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
                   1257:                        ret = errno;
                   1258:                        break;
                   1259:                }
1.98      christos 1260:                if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1261:                        if (ferror(tp)) {
                   1262:                                ret = errno;
                   1263:                                break;
                   1264:                        }
                   1265:                        ret = EAGAIN;
                   1266:                        break;
                   1267:                }
                   1268:                cp = buf + sizeof(buf);
                   1269:        }
                   1270:
                   1271:        if (ret || nlines > 0)
                   1272:                goto out3;
                   1273:
1.98      christos 1274:        if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) {
1.85      christos 1275:                ret = errno;
                   1276:                goto out3;
                   1277:        }
                   1278:
                   1279:        if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
                   1280:            (off_t)-1) {
                   1281:                ret = errno;
                   1282:                goto out3;
                   1283:        }
                   1284:
                   1285:        for(;;) {
1.99      christos 1286:                if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) {
1.85      christos 1287:                        if (ferror(fp))
                   1288:                                ret = errno;
                   1289:                        break;
                   1290:                }
1.98      christos 1291:                if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) {
1.85      christos 1292:                        ret = errno;
                   1293:                        break;
                   1294:                }
                   1295:        }
                   1296:        fflush(fp);
                   1297:        if((off = ftello(fp)) > 0)
                   1298:                (void)ftruncate(fileno(fp), off);
                   1299: out3:
                   1300:        fclose(tp);
                   1301: out2:
                   1302:        unlink(template);
                   1303: out1:
                   1304:        fclose(fp);
                   1305:
                   1306:        return ret;
                   1307: }
                   1308:
1.11      lukem    1309:
1.1       christos 1310: /*
                   1311:  * read history from a file given
                   1312:  */
                   1313: int
1.11      lukem    1314: read_history(const char *filename)
1.1       christos 1315: {
1.92      christos 1316:        HistEvent ev;
1.1       christos 1317:
                   1318:        if (h == NULL || e == NULL)
                   1319:                rl_initialize();
1.85      christos 1320:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1321:                return errno;
1.96      christos 1322:        return history(h, &ev, H_LOAD, filename) == -1 ?
                   1323:            (errno ? errno : EINVAL) : 0;
1.1       christos 1324: }
                   1325:
1.11      lukem    1326:
1.1       christos 1327: /*
                   1328:  * write history to a file given
                   1329:  */
                   1330: int
1.11      lukem    1331: write_history(const char *filename)
1.1       christos 1332: {
1.92      christos 1333:        HistEvent ev;
1.1       christos 1334:
                   1335:        if (h == NULL || e == NULL)
                   1336:                rl_initialize();
1.85      christos 1337:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1338:                return errno;
1.96      christos 1339:        return history(h, &ev, H_SAVE, filename) == -1 ?
                   1340:            (errno ? errno : EINVAL) : 0;
1.1       christos 1341: }
                   1342:
1.11      lukem    1343:
1.1       christos 1344: /*
                   1345:  * returns history ``num''th event
                   1346:  *
                   1347:  * returned pointer points to static variable
                   1348:  */
1.2       christos 1349: HIST_ENTRY *
1.11      lukem    1350: history_get(int num)
1.1       christos 1351: {
                   1352:        static HIST_ENTRY she;
1.92      christos 1353:        HistEvent ev;
1.40      christos 1354:        int curr_num;
1.1       christos 1355:
                   1356:        if (h == NULL || e == NULL)
                   1357:                rl_initialize();
                   1358:
1.40      christos 1359:        /* save current position */
1.92      christos 1360:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1361:                return NULL;
1.1       christos 1362:        curr_num = ev.num;
1.40      christos 1363:
1.85      christos 1364:        /* start from the oldest */
1.92      christos 1365:        if (history(h, &ev, H_LAST) != 0)
1.96      christos 1366:                return NULL;    /* error */
1.40      christos 1367:
1.85      christos 1368:        /* look forwards for event matching specified offset */
1.92      christos 1369:        if (history(h, &ev, H_NEXT_EVDATA, num, &she.data))
1.96      christos 1370:                return NULL;
1.1       christos 1371:
1.92      christos 1372:        she.line = ev.str;
1.1       christos 1373:
1.40      christos 1374:        /* restore pointer to where it was */
1.92      christos 1375:        (void)history(h, &ev, H_SET, curr_num);
1.1       christos 1376:
1.96      christos 1377:        return &she;
1.1       christos 1378: }
                   1379:
1.11      lukem    1380:
1.1       christos 1381: /*
                   1382:  * add the line to history table
                   1383:  */
                   1384: int
1.11      lukem    1385: add_history(const char *line)
1.1       christos 1386: {
1.92      christos 1387:        HistEvent ev;
1.1       christos 1388:
1.104     christos 1389:        if (line == NULL)
                   1390:                return 0;
                   1391:
1.1       christos 1392:        if (h == NULL || e == NULL)
                   1393:                rl_initialize();
                   1394:
1.92      christos 1395:        (void)history(h, &ev, H_ENTER, line);
                   1396:        if (history(h, &ev, H_GETSIZE) == 0)
1.1       christos 1397:                history_length = ev.num;
                   1398:
1.96      christos 1399:        return !(history_length > 0); /* return 0 if all is okay */
1.1       christos 1400: }
                   1401:
1.11      lukem    1402:
1.1       christos 1403: /*
1.58      christos 1404:  * remove the specified entry from the history list and return it.
                   1405:  */
                   1406: HIST_ENTRY *
                   1407: remove_history(int num)
                   1408: {
1.85      christos 1409:        HIST_ENTRY *he;
1.92      christos 1410:        HistEvent ev;
1.58      christos 1411:
                   1412:        if (h == NULL || e == NULL)
                   1413:                rl_initialize();
                   1414:
1.95      christos 1415:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.58      christos 1416:                return NULL;
                   1417:
1.92      christos 1418:        if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1.95      christos 1419:                el_free(he);
1.71      christos 1420:                return NULL;
1.85      christos 1421:        }
1.71      christos 1422:
1.92      christos 1423:        he->line = ev.str;
                   1424:        if (history(h, &ev, H_GETSIZE) == 0)
1.85      christos 1425:                history_length = ev.num;
1.58      christos 1426:
1.85      christos 1427:        return he;
1.58      christos 1428: }
                   1429:
                   1430:
                   1431: /*
1.85      christos 1432:  * replace the line and data of the num-th entry
                   1433:  */
                   1434: HIST_ENTRY *
                   1435: replace_history_entry(int num, const char *line, histdata_t data)
                   1436: {
                   1437:        HIST_ENTRY *he;
1.92      christos 1438:        HistEvent ev;
1.85      christos 1439:        int curr_num;
                   1440:
                   1441:        if (h == NULL || e == NULL)
                   1442:                rl_initialize();
                   1443:
                   1444:        /* save current position */
1.92      christos 1445:        if (history(h, &ev, H_CURR) != 0)
1.85      christos 1446:                return NULL;
                   1447:        curr_num = ev.num;
                   1448:
                   1449:        /* start from the oldest */
1.92      christos 1450:        if (history(h, &ev, H_LAST) != 0)
1.85      christos 1451:                return NULL;    /* error */
                   1452:
1.95      christos 1453:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.85      christos 1454:                return NULL;
                   1455:
                   1456:        /* look forwards for event matching specified offset */
1.92      christos 1457:        if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1.85      christos 1458:                goto out;
                   1459:
1.92      christos 1460:        he->line = strdup(ev.str);
1.85      christos 1461:        if (he->line == NULL)
                   1462:                goto out;
                   1463:
1.92      christos 1464:        if (history(h, &ev, H_REPLACE, line, data))
1.85      christos 1465:                goto out;
                   1466:
                   1467:        /* restore pointer to where it was */
1.92      christos 1468:        if (history(h, &ev, H_SET, curr_num))
1.85      christos 1469:                goto out;
                   1470:
                   1471:        return he;
                   1472: out:
1.95      christos 1473:        el_free(he);
1.85      christos 1474:        return NULL;
                   1475: }
                   1476:
                   1477: /*
1.1       christos 1478:  * clear the history list - delete all entries
                   1479:  */
                   1480: void
1.11      lukem    1481: clear_history(void)
1.1       christos 1482: {
1.92      christos 1483:        HistEvent ev;
1.11      lukem    1484:
1.110   ! christos 1485:        if (h == NULL || e == NULL)
        !          1486:                rl_initialize();
        !          1487:
1.92      christos 1488:        (void)history(h, &ev, H_CLEAR);
1.85      christos 1489:        history_length = 0;
1.1       christos 1490: }
                   1491:
1.11      lukem    1492:
1.1       christos 1493: /*
                   1494:  * returns offset of the current history event
                   1495:  */
                   1496: int
1.11      lukem    1497: where_history(void)
1.1       christos 1498: {
1.92      christos 1499:        HistEvent ev;
1.1       christos 1500:        int curr_num, off;
                   1501:
1.92      christos 1502:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1503:                return 0;
1.1       christos 1504:        curr_num = ev.num;
                   1505:
1.92      christos 1506:        (void)history(h, &ev, H_FIRST);
1.1       christos 1507:        off = 1;
1.92      christos 1508:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1.1       christos 1509:                off++;
                   1510:
1.96      christos 1511:        return off;
1.1       christos 1512: }
                   1513:
1.11      lukem    1514:
1.1       christos 1515: /*
                   1516:  * returns current history event or NULL if there is no such event
                   1517:  */
1.2       christos 1518: HIST_ENTRY *
1.11      lukem    1519: current_history(void)
1.1       christos 1520: {
1.11      lukem    1521:
1.96      christos 1522:        return _move_history(H_CURR);
1.1       christos 1523: }
                   1524:
1.11      lukem    1525:
1.1       christos 1526: /*
                   1527:  * returns total number of bytes history events' data are using
                   1528:  */
                   1529: int
1.11      lukem    1530: history_total_bytes(void)
1.1       christos 1531: {
1.92      christos 1532:        HistEvent ev;
1.80      christos 1533:        int curr_num;
                   1534:        size_t size;
1.1       christos 1535:
1.92      christos 1536:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1537:                return -1;
1.1       christos 1538:        curr_num = ev.num;
                   1539:
1.92      christos 1540:        (void)history(h, &ev, H_FIRST);
1.1       christos 1541:        size = 0;
                   1542:        do
1.92      christos 1543:                size += strlen(ev.str) * sizeof(*ev.str);
                   1544:        while (history(h, &ev, H_NEXT) == 0);
1.1       christos 1545:
                   1546:        /* get to the same position as before */
1.92      christos 1547:        history(h, &ev, H_PREV_EVENT, curr_num);
1.1       christos 1548:
1.96      christos 1549:        return (int)size;
1.1       christos 1550: }
                   1551:
1.11      lukem    1552:
1.1       christos 1553: /*
                   1554:  * sets the position in the history list to ``pos''
                   1555:  */
                   1556: int
1.11      lukem    1557: history_set_pos(int pos)
1.1       christos 1558: {
1.92      christos 1559:        HistEvent ev;
1.40      christos 1560:        int curr_num;
1.1       christos 1561:
1.85      christos 1562:        if (pos >= history_length || pos < 0)
1.96      christos 1563:                return -1;
1.1       christos 1564:
1.92      christos 1565:        (void)history(h, &ev, H_CURR);
1.1       christos 1566:        curr_num = ev.num;
                   1567:
1.85      christos 1568:        /*
                   1569:         * use H_DELDATA to set to nth history (without delete) by passing
                   1570:         * (void **)-1
                   1571:         */
1.92      christos 1572:        if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
                   1573:                (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1574:                return -1;
1.1       christos 1575:        }
1.96      christos 1576:        return 0;
1.1       christos 1577: }
                   1578:
1.11      lukem    1579:
1.1       christos 1580: /*
                   1581:  * returns previous event in history and shifts pointer accordingly
                   1582:  */
1.2       christos 1583: HIST_ENTRY *
1.11      lukem    1584: previous_history(void)
1.1       christos 1585: {
1.11      lukem    1586:
1.96      christos 1587:        return _move_history(H_PREV);
1.1       christos 1588: }
                   1589:
1.11      lukem    1590:
1.1       christos 1591: /*
                   1592:  * returns next event in history and shifts pointer accordingly
                   1593:  */
1.2       christos 1594: HIST_ENTRY *
1.11      lukem    1595: next_history(void)
1.1       christos 1596: {
1.11      lukem    1597:
1.96      christos 1598:        return _move_history(H_NEXT);
1.1       christos 1599: }
                   1600:
1.11      lukem    1601:
1.1       christos 1602: /*
1.40      christos 1603:  * searches for first history event containing the str
1.1       christos 1604:  */
1.40      christos 1605: int
                   1606: history_search(const char *str, int direction)
1.11      lukem    1607: {
1.92      christos 1608:        HistEvent ev;
                   1609:        const char *strp;
1.11      lukem    1610:        int curr_num;
1.1       christos 1611:
1.92      christos 1612:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1613:                return -1;
1.1       christos 1614:        curr_num = ev.num;
                   1615:
                   1616:        for (;;) {
1.92      christos 1617:                if ((strp = strstr(ev.str, str)) != NULL)
1.96      christos 1618:                        return (int)(strp - ev.str);
1.92      christos 1619:                if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1.1       christos 1620:                        break;
                   1621:        }
1.92      christos 1622:        (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1623:        return -1;
1.1       christos 1624: }
                   1625:
1.11      lukem    1626:
1.1       christos 1627: /*
                   1628:  * searches for first history event beginning with str
                   1629:  */
                   1630: int
1.11      lukem    1631: history_search_prefix(const char *str, int direction)
1.1       christos 1632: {
1.92      christos 1633:        HistEvent ev;
1.11      lukem    1634:
1.92      christos 1635:        return (history(h, &ev, direction < 0 ?
1.88      christos 1636:            H_PREV_STR : H_NEXT_STR, str));
1.1       christos 1637: }
                   1638:
1.11      lukem    1639:
1.1       christos 1640: /*
                   1641:  * search for event in history containing str, starting at offset
                   1642:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1643:  */
1.5       christos 1644: /* ARGSUSED */
1.1       christos 1645: int
1.40      christos 1646: history_search_pos(const char *str,
1.30      christos 1647:                   int direction __attribute__((__unused__)), int pos)
1.1       christos 1648: {
1.92      christos 1649:        HistEvent ev;
1.11      lukem    1650:        int curr_num, off;
1.1       christos 1651:
                   1652:        off = (pos > 0) ? pos : -pos;
                   1653:        pos = (pos > 0) ? 1 : -1;
                   1654:
1.92      christos 1655:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1656:                return -1;
1.1       christos 1657:        curr_num = ev.num;
                   1658:
1.92      christos 1659:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1.96      christos 1660:                return -1;
1.1       christos 1661:
                   1662:        for (;;) {
1.92      christos 1663:                if (strstr(ev.str, str))
1.96      christos 1664:                        return off;
1.92      christos 1665:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1.1       christos 1666:                        break;
                   1667:        }
                   1668:
                   1669:        /* set "current" pointer back to previous state */
1.92      christos 1670:        (void)history(h, &ev,
1.88      christos 1671:            pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1.1       christos 1672:
1.96      christos 1673:        return -1;
1.1       christos 1674: }
                   1675:
                   1676:
                   1677: /********************************/
1.40      christos 1678: /* completion functions */
1.1       christos 1679:
1.57      christos 1680: char *
                   1681: tilde_expand(char *name)
                   1682: {
                   1683:        return fn_tilde_expand(name);
                   1684: }
                   1685:
                   1686: char *
                   1687: filename_completion_function(const char *name, int state)
                   1688: {
                   1689:        return fn_filename_completion_function(name, state);
                   1690: }
                   1691:
1.1       christos 1692: /*
                   1693:  * a completion generator for usernames; returns _first_ username
                   1694:  * which starts with supplied text
                   1695:  * text contains a partial username preceded by random character
1.94      christos 1696:  * (usually '~'); state resets search from start (??? should we do that anyway)
1.1       christos 1697:  * it's callers responsibility to free returned value
                   1698:  */
1.11      lukem    1699: char *
                   1700: username_completion_function(const char *text, int state)
1.1       christos 1701: {
1.94      christos 1702: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1703:        struct passwd pwres;
1.50      christos 1704:        char pwbuf[1024];
1.94      christos 1705: #endif
                   1706:        struct passwd *pass = NULL;
1.1       christos 1707:
                   1708:        if (text[0] == '\0')
1.96      christos 1709:                return NULL;
1.1       christos 1710:
                   1711:        if (*text == '~')
                   1712:                text++;
                   1713:
                   1714:        if (state == 0)
                   1715:                setpwent();
                   1716:
1.94      christos 1717:        while (
                   1718: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1719:            getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL
                   1720: #else
                   1721:            (pass = getpwent()) != NULL
                   1722: #endif
                   1723:            && text[0] == pass->pw_name[0]
                   1724:            && strcmp(text, pass->pw_name) == 0)
                   1725:                continue;
1.1       christos 1726:
1.94      christos 1727:        if (pass == NULL) {
1.1       christos 1728:                endpwent();
1.85      christos 1729:                return NULL;
1.1       christos 1730:        }
1.94      christos 1731:        return strdup(pass->pw_name);
1.1       christos 1732: }
                   1733:
1.11      lukem    1734:
1.1       christos 1735: /*
1.46      christos 1736:  * el-compatible wrapper to send TSTP on ^Z
                   1737:  */
                   1738: /* ARGSUSED */
                   1739: static unsigned char
                   1740: _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
                   1741: {
                   1742:        (void)kill(0, SIGTSTP);
                   1743:        return CC_NORM;
                   1744: }
1.11      lukem    1745:
1.1       christos 1746: /*
1.12      jdolecek 1747:  * Display list of strings in columnar format on readline's output stream.
                   1748:  * 'matches' is list of strings, 'len' is number of strings in 'matches',
                   1749:  * 'max' is maximum length of string in 'matches'.
                   1750:  */
                   1751: void
1.53      dsl      1752: rl_display_match_list(char **matches, int len, int max)
1.12      jdolecek 1753: {
                   1754:
1.81      christos 1755:        fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1.1       christos 1756: }
                   1757:
1.56      christos 1758: static const char *
                   1759: /*ARGSUSED*/
                   1760: _rl_completion_append_character_function(const char *dummy
                   1761:     __attribute__((__unused__)))
                   1762: {
                   1763:        static char buf[2];
1.99      christos 1764:        buf[0] = (char)rl_completion_append_character;
1.76      christos 1765:        buf[1] = '\0';
1.56      christos 1766:        return buf;
                   1767: }
                   1768:
1.11      lukem    1769:
1.1       christos 1770: /*
                   1771:  * complete word at current point
                   1772:  */
1.53      dsl      1773: /* ARGSUSED */
1.1       christos 1774: int
1.53      dsl      1775: rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1.1       christos 1776: {
1.86      christos 1777: #ifdef WIDECHAR
                   1778:        static ct_buffer_t wbreak_conv, sprefix_conv;
                   1779: #endif
1.102     christos 1780:        char *breakchars;
1.86      christos 1781:
1.1       christos 1782:        if (h == NULL || e == NULL)
                   1783:                rl_initialize();
                   1784:
                   1785:        if (rl_inhibit_completion) {
1.47      christos 1786:                char arr[2];
                   1787:                arr[0] = (char)invoking_key;
                   1788:                arr[1] = '\0';
                   1789:                el_insertstr(e, arr);
1.96      christos 1790:                return CC_REFRESH;
1.53      dsl      1791:        }
                   1792:
1.102     christos 1793:        if (rl_completion_word_break_hook != NULL)
                   1794:                breakchars = (*rl_completion_word_break_hook)();
                   1795:        else
                   1796:                breakchars = rl_basic_word_break_characters;
                   1797:
1.53      dsl      1798:        /* Just look at how many global variables modify this operation! */
                   1799:        return fn_complete(e,
                   1800:            (CPFunction *)rl_completion_entry_function,
                   1801:            rl_attempted_completion_function,
1.86      christos 1802:            ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1.102     christos 1803:            ct_decode_string(breakchars, &sprefix_conv),
1.81      christos 1804:            _rl_completion_append_character_function,
                   1805:            (size_t)rl_completion_query_items,
1.53      dsl      1806:            &rl_completion_type, &rl_attempted_completion_over,
                   1807:            &rl_point, &rl_end);
1.92      christos 1808:
                   1809:
1.1       christos 1810: }
                   1811:
1.11      lukem    1812:
1.53      dsl      1813: /* ARGSUSED */
                   1814: static unsigned char
                   1815: _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
                   1816: {
                   1817:        return (unsigned char)rl_complete(0, ch);
                   1818: }
                   1819:
1.1       christos 1820: /*
1.7       simonb   1821:  * misc other functions
1.1       christos 1822:  */
                   1823:
                   1824: /*
                   1825:  * bind key c to readline-type function func
                   1826:  */
                   1827: int
1.85      christos 1828: rl_bind_key(int c, rl_command_func_t *func)
1.1       christos 1829: {
1.11      lukem    1830:        int retval = -1;
1.1       christos 1831:
                   1832:        if (h == NULL || e == NULL)
                   1833:                rl_initialize();
                   1834:
                   1835:        if (func == rl_insert) {
                   1836:                /* XXX notice there is no range checking of ``c'' */
                   1837:                e->el_map.key[c] = ED_INSERT;
                   1838:                retval = 0;
                   1839:        }
1.96      christos 1840:        return retval;
1.1       christos 1841: }
                   1842:
1.11      lukem    1843:
1.1       christos 1844: /*
                   1845:  * read one key from input - handles chars pushed back
                   1846:  * to input stream also
                   1847:  */
                   1848: int
1.11      lukem    1849: rl_read_key(void)
1.1       christos 1850: {
1.11      lukem    1851:        char fooarr[2 * sizeof(int)];
1.1       christos 1852:
                   1853:        if (e == NULL || h == NULL)
                   1854:                rl_initialize();
                   1855:
1.96      christos 1856:        return el_getc(e, fooarr);
1.1       christos 1857: }
                   1858:
1.11      lukem    1859:
1.1       christos 1860: /*
                   1861:  * reset the terminal
                   1862:  */
1.5       christos 1863: /* ARGSUSED */
1.1       christos 1864: void
1.30      christos 1865: rl_reset_terminal(const char *p __attribute__((__unused__)))
1.1       christos 1866: {
1.11      lukem    1867:
1.1       christos 1868:        if (h == NULL || e == NULL)
                   1869:                rl_initialize();
                   1870:        el_reset(e);
                   1871: }
                   1872:
1.11      lukem    1873:
1.1       christos 1874: /*
                   1875:  * insert character ``c'' back into input stream, ``count'' times
                   1876:  */
                   1877: int
1.11      lukem    1878: rl_insert(int count, int c)
1.1       christos 1879: {
1.11      lukem    1880:        char arr[2];
1.1       christos 1881:
                   1882:        if (h == NULL || e == NULL)
                   1883:                rl_initialize();
                   1884:
                   1885:        /* XXX - int -> char conversion can lose on multichars */
1.99      christos 1886:        arr[0] = (char)c;
1.1       christos 1887:        arr[1] = '\0';
                   1888:
                   1889:        for (; count > 0; count--)
                   1890:                el_push(e, arr);
                   1891:
1.96      christos 1892:        return 0;
1.35      christos 1893: }
                   1894:
1.85      christos 1895: int
                   1896: rl_insert_text(const char *text)
                   1897: {
                   1898:        if (!text || *text == 0)
1.96      christos 1899:                return 0;
1.85      christos 1900:
                   1901:        if (h == NULL || e == NULL)
                   1902:                rl_initialize();
                   1903:
                   1904:        if (el_insertstr(e, text) < 0)
1.96      christos 1905:                return 0;
1.85      christos 1906:        return (int)strlen(text);
                   1907: }
                   1908:
1.35      christos 1909: /*ARGSUSED*/
                   1910: int
1.97      christos 1911: rl_newline(int count __attribute__((__unused__)),
                   1912:     int c __attribute__((__unused__)))
1.35      christos 1913: {
                   1914:        /*
                   1915:         * Readline-4.0 appears to ignore the args.
                   1916:         */
                   1917:        return rl_insert(1, '\n');
                   1918: }
                   1919:
                   1920: /*ARGSUSED*/
                   1921: static unsigned char
1.97      christos 1922: rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c)
1.35      christos 1923: {
                   1924:        if (map[c] == NULL)
                   1925:            return CC_ERROR;
1.49      christos 1926:
                   1927:        _rl_update_pos();
                   1928:
1.35      christos 1929:        (*map[c])(NULL, c);
1.38      christos 1930:
                   1931:        /* If rl_done was set by the above call, deal with it here */
                   1932:        if (rl_done)
                   1933:                return CC_EOF;
                   1934:
1.35      christos 1935:        return CC_NORM;
                   1936: }
                   1937:
                   1938: int
                   1939: rl_add_defun(const char *name, Function *fun, int c)
                   1940: {
                   1941:        char dest[8];
1.77      lukem    1942:        if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1.35      christos 1943:                return -1;
                   1944:        map[(unsigned char)c] = fun;
                   1945:        el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1.37      christos 1946:        vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1.106     christos 1947:        el_set(e, EL_BIND, dest, name, NULL);
1.35      christos 1948:        return 0;
                   1949: }
                   1950:
                   1951: void
1.101     matt     1952: rl_callback_read_char(void)
1.35      christos 1953: {
1.36      christos 1954:        int count = 0, done = 0;
1.35      christos 1955:        const char *buf = el_gets(e, &count);
                   1956:        char *wbuf;
                   1957:
                   1958:        if (buf == NULL || count-- <= 0)
                   1959:                return;
1.61      christos 1960:        if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1.36      christos 1961:                done = 1;
                   1962:        if (buf[count] == '\n' || buf[count] == '\r')
                   1963:                done = 2;
                   1964:
                   1965:        if (done && rl_linefunc != NULL) {
1.35      christos 1966:                el_set(e, EL_UNBUFFERED, 0);
1.36      christos 1967:                if (done == 2) {
                   1968:                    if ((wbuf = strdup(buf)) != NULL)
                   1969:                        wbuf[count] = '\0';
                   1970:                } else
                   1971:                        wbuf = NULL;
1.35      christos 1972:                (*(void (*)(const char *))rl_linefunc)(wbuf);
1.85      christos 1973:                //el_set(e, EL_UNBUFFERED, 1);
1.35      christos 1974:        }
                   1975: }
                   1976:
                   1977: void
1.72      christos 1978: rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1.35      christos 1979: {
                   1980:        if (e == NULL) {
                   1981:                rl_initialize();
                   1982:        }
1.78      christos 1983:        (void)rl_set_prompt(prompt);
1.35      christos 1984:        rl_linefunc = linefunc;
                   1985:        el_set(e, EL_UNBUFFERED, 1);
                   1986: }
                   1987:
                   1988: void
                   1989: rl_callback_handler_remove(void)
                   1990: {
                   1991:        el_set(e, EL_UNBUFFERED, 0);
1.72      christos 1992:        rl_linefunc = NULL;
1.35      christos 1993: }
                   1994:
                   1995: void
                   1996: rl_redisplay(void)
                   1997: {
                   1998:        char a[2];
1.99      christos 1999:        a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT];
1.35      christos 2000:        a[1] = '\0';
                   2001:        el_push(e, a);
                   2002: }
                   2003:
                   2004: int
                   2005: rl_get_previous_history(int count, int key)
                   2006: {
                   2007:        char a[2];
1.99      christos 2008:        a[0] = (char)key;
1.35      christos 2009:        a[1] = '\0';
                   2010:        while (count--)
                   2011:                el_push(e, a);
                   2012:        return 0;
1.38      christos 2013: }
                   2014:
                   2015: void
                   2016: /*ARGSUSED*/
1.97      christos 2017: rl_prep_terminal(int meta_flag __attribute__((__unused__)))
1.38      christos 2018: {
                   2019:        el_set(e, EL_PREP_TERM, 1);
                   2020: }
                   2021:
                   2022: void
1.68      christos 2023: rl_deprep_terminal(void)
1.38      christos 2024: {
                   2025:        el_set(e, EL_PREP_TERM, 0);
                   2026: }
                   2027:
                   2028: int
                   2029: rl_read_init_file(const char *s)
                   2030: {
1.96      christos 2031:        return el_source(e, s);
1.38      christos 2032: }
                   2033:
                   2034: int
                   2035: rl_parse_and_bind(const char *line)
                   2036: {
                   2037:        const char **argv;
                   2038:        int argc;
                   2039:        Tokenizer *tok;
                   2040:
                   2041:        tok = tok_init(NULL);
1.44      lukem    2042:        tok_str(tok, line, &argc, &argv);
1.38      christos 2043:        argc = el_parse(e, argc, argv);
                   2044:        tok_end(tok);
1.96      christos 2045:        return argc ? 1 : 0;
1.38      christos 2046: }
                   2047:
1.51      christos 2048: int
                   2049: rl_variable_bind(const char *var, const char *value)
                   2050: {
                   2051:        /*
                   2052:         * The proper return value is undocument, but this is what the
                   2053:         * readline source seems to do.
                   2054:         */
1.106     christos 2055:        return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
1.51      christos 2056: }
                   2057:
1.38      christos 2058: void
                   2059: rl_stuff_char(int c)
                   2060: {
                   2061:        char buf[2];
                   2062:
1.99      christos 2063:        buf[0] = (char)c;
1.38      christos 2064:        buf[1] = '\0';
                   2065:        el_insertstr(e, buf);
                   2066: }
                   2067:
                   2068: static int
                   2069: _rl_event_read_char(EditLine *el, char *cp)
                   2070: {
1.80      christos 2071:        int     n;
                   2072:        ssize_t num_read = 0;
1.38      christos 2073:
1.76      christos 2074:        *cp = '\0';
1.38      christos 2075:        while (rl_event_hook) {
                   2076:
                   2077:                (*rl_event_hook)();
                   2078:
                   2079: #if defined(FIONREAD)
                   2080:                if (ioctl(el->el_infd, FIONREAD, &n) < 0)
1.96      christos 2081:                        return -1;
1.38      christos 2082:                if (n)
1.98      christos 2083:                        num_read = read(el->el_infd, cp, (size_t)1);
1.38      christos 2084:                else
                   2085:                        num_read = 0;
                   2086: #elif defined(F_SETFL) && defined(O_NDELAY)
                   2087:                if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
1.96      christos 2088:                        return -1;
1.38      christos 2089:                if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
1.96      christos 2090:                        return -1;
1.38      christos 2091:                num_read = read(el->el_infd, cp, 1);
                   2092:                if (fcntl(el->el_infd, F_SETFL, n))
1.96      christos 2093:                        return -1;
1.38      christos 2094: #else
                   2095:                /* not non-blocking, but what you gonna do? */
                   2096:                num_read = read(el->el_infd, cp, 1);
1.96      christos 2097:                return -1;
1.38      christos 2098: #endif
                   2099:
                   2100:                if (num_read < 0 && errno == EAGAIN)
                   2101:                        continue;
                   2102:                if (num_read == 0)
                   2103:                        continue;
                   2104:                break;
                   2105:        }
                   2106:        if (!rl_event_hook)
                   2107:                el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
1.80      christos 2108:        return (int)num_read;
1.1       christos 2109: }
1.49      christos 2110:
                   2111: static void
                   2112: _rl_update_pos(void)
                   2113: {
                   2114:        const LineInfo *li = el_line(e);
                   2115:
1.80      christos 2116:        rl_point = (int)(li->cursor - li->buffer);
                   2117:        rl_end = (int)(li->lastchar - li->buffer);
1.49      christos 2118: }
1.70      christos 2119:
                   2120: void
                   2121: rl_get_screen_size(int *rows, int *cols)
                   2122: {
                   2123:        if (rows)
1.107     christos 2124:                el_get(e, EL_GETTC, "li", rows, (void *)0);
1.70      christos 2125:        if (cols)
1.107     christos 2126:                el_get(e, EL_GETTC, "co", cols, (void *)0);
1.70      christos 2127: }
                   2128:
                   2129: void
                   2130: rl_set_screen_size(int rows, int cols)
                   2131: {
                   2132:        char buf[64];
                   2133:        (void)snprintf(buf, sizeof(buf), "%d", rows);
1.106     christos 2134:        el_set(e, EL_SETTC, "li", buf, NULL);
1.70      christos 2135:        (void)snprintf(buf, sizeof(buf), "%d", cols);
1.106     christos 2136:        el_set(e, EL_SETTC, "co", buf, NULL);
1.70      christos 2137: }
                   2138:
1.71      christos 2139: char **
                   2140: rl_completion_matches(const char *str, rl_compentry_func_t *fun)
                   2141: {
                   2142:        size_t len, max, i, j, min;
                   2143:        char **list, *match, *a, *b;
                   2144:
                   2145:        len = 1;
                   2146:        max = 10;
1.95      christos 2147:        if ((list = el_malloc(max * sizeof(*list))) == NULL)
1.71      christos 2148:                return NULL;
                   2149:
                   2150:        while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
1.83      christos 2151:                list[len++] = match;
1.71      christos 2152:                if (len == max) {
                   2153:                        char **nl;
                   2154:                        max += 10;
1.95      christos 2155:                        if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL)
1.71      christos 2156:                                goto out;
                   2157:                        list = nl;
                   2158:                }
                   2159:        }
                   2160:        if (len == 1)
                   2161:                goto out;
                   2162:        list[len] = NULL;
                   2163:        if (len == 2) {
                   2164:                if ((list[0] = strdup(list[1])) == NULL)
                   2165:                        goto out;
                   2166:                return list;
                   2167:        }
                   2168:        qsort(&list[1], len - 1, sizeof(*list),
                   2169:            (int (*)(const void *, const void *)) strcmp);
                   2170:        min = SIZE_T_MAX;
                   2171:        for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
                   2172:                b = list[i + 1];
                   2173:                for (j = 0; a[j] && a[j] == b[j]; j++)
                   2174:                        continue;
                   2175:                if (min > j)
                   2176:                        min = j;
                   2177:        }
                   2178:        if (min == 0 && *str) {
                   2179:                if ((list[0] = strdup(str)) == NULL)
                   2180:                        goto out;
                   2181:        } else {
1.95      christos 2182:                if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL)
1.71      christos 2183:                        goto out;
                   2184:                (void)memcpy(list[0], list[1], min);
                   2185:                list[0][min] = '\0';
                   2186:        }
                   2187:        return list;
                   2188:
                   2189: out:
1.95      christos 2190:        el_free(list);
1.71      christos 2191:        return NULL;
                   2192: }
                   2193:
1.70      christos 2194: char *
                   2195: rl_filename_completion_function (const char *text, int state)
                   2196: {
                   2197:        return fn_filename_completion_function(text, state);
                   2198: }
                   2199:
1.73      christos 2200: void
                   2201: rl_forced_update_display(void)
                   2202: {
1.74      christos 2203:        el_set(e, EL_REFRESH);
1.73      christos 2204: }
                   2205:
1.70      christos 2206: int
                   2207: _rl_abort_internal(void)
                   2208: {
                   2209:        el_beep(e);
                   2210:        longjmp(topbuf, 1);
                   2211:        /*NOTREACHED*/
                   2212: }
                   2213:
                   2214: int
                   2215: _rl_qsort_string_compare(char **s1, char **s2)
                   2216: {
                   2217:        return strcoll(*s1, *s2);
                   2218: }
                   2219:
1.85      christos 2220: HISTORY_STATE *
                   2221: history_get_history_state(void)
                   2222: {
                   2223:        HISTORY_STATE *hs;
                   2224:
1.95      christos 2225:        if ((hs = el_malloc(sizeof(*hs))) == NULL)
1.96      christos 2226:                return NULL;
1.85      christos 2227:        hs->length = history_length;
1.96      christos 2228:        return hs;
1.85      christos 2229: }
                   2230:
1.70      christos 2231: int
                   2232: /*ARGSUSED*/
1.97      christos 2233: rl_kill_text(int from __attribute__((__unused__)),
                   2234:     int to __attribute__((__unused__)))
1.70      christos 2235: {
                   2236:        return 0;
                   2237: }
                   2238:
                   2239: Keymap
                   2240: rl_make_bare_keymap(void)
                   2241: {
                   2242:        return NULL;
                   2243: }
                   2244:
                   2245: Keymap
                   2246: rl_get_keymap(void)
                   2247: {
                   2248:        return NULL;
                   2249: }
                   2250:
                   2251: void
                   2252: /*ARGSUSED*/
1.97      christos 2253: rl_set_keymap(Keymap k __attribute__((__unused__)))
1.70      christos 2254: {
                   2255: }
                   2256:
                   2257: int
                   2258: /*ARGSUSED*/
1.97      christos 2259: rl_generic_bind(int type __attribute__((__unused__)),
                   2260:     const char * keyseq __attribute__((__unused__)),
                   2261:     const char * data __attribute__((__unused__)),
                   2262:     Keymap k __attribute__((__unused__)))
1.70      christos 2263: {
                   2264:        return 0;
                   2265: }
                   2266:
                   2267: int
                   2268: /*ARGSUSED*/
1.97      christos 2269: rl_bind_key_in_map(int key __attribute__((__unused__)),
                   2270:     rl_command_func_t *fun __attribute__((__unused__)),
                   2271:     Keymap k __attribute__((__unused__)))
1.70      christos 2272: {
                   2273:        return 0;
                   2274: }
1.85      christos 2275:
                   2276: /* unsupported, but needed by python */
                   2277: void
                   2278: rl_cleanup_after_signal(void)
                   2279: {
                   2280: }
1.90      christos 2281:
                   2282: int
                   2283: rl_on_new_line(void)
                   2284: {
                   2285:        return 0;
                   2286: }
1.105     christos 2287:
                   2288: void
                   2289: rl_free_line_state(void)
                   2290: {
                   2291: }

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