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Annotation of src/lib/libedit/readline.c, Revision 1.74.2.1

1.74.2.1! yamt        1: /*     $NetBSD: readline.c,v 1.74 2008/04/05 15:53:28 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)
1.74.2.1! yamt       34: __RCSID("$NetBSD: readline.c,v 1.74 2008/04/05 15:53:28 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>
1.38      christos   50: #ifdef HAVE_VIS_H
1.35      christos   51: #include <vis.h>
1.38      christos   52: #else
                     53: #include "np/vis.h"
                     54: #endif
1.27      christos   55: #ifdef HAVE_ALLOCA_H
                     56: #include <alloca.h>
                     57: #endif
1.45      christos   58: #include "el.h"
                     59: #include "fcns.h"              /* for EL_NUM_FCNS */
1.1       christos   60: #include "histedit.h"
1.17      jdolecek   61: #include "readline/readline.h"
1.53      dsl        62: #include "filecomplete.h"
1.1       christos   63:
1.68      christos   64: void rl_prep_terminal(int);
                     65: void rl_deprep_terminal(void);
                     66:
1.1       christos   67: /* for rl_complete() */
1.40      christos   68: #define TAB            '\r'
1.1       christos   69:
                     70: /* see comment at the #ifdef for sense of this */
1.40      christos   71: /* #define GDB_411_HACK */
1.1       christos   72:
                     73: /* readline compatibility stuff - look at readline sources/documentation */
                     74: /* to see what these variables mean */
1.11      lukem      75: const char *rl_library_version = "EditLine wrapper";
1.20      christos   76: static char empty[] = { '\0' };
                     77: static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
                     78: static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
                     79:     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
                     80: char *rl_readline_name = empty;
1.11      lukem      81: FILE *rl_instream = NULL;
                     82: FILE *rl_outstream = NULL;
                     83: int rl_point = 0;
                     84: int rl_end = 0;
                     85: char *rl_line_buffer = NULL;
1.55      agc        86: VCPFunction *rl_linefunc = NULL;
1.38      christos   87: int rl_done = 0;
                     88: VFunction *rl_event_hook = NULL;
1.70      christos   89: KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
                     90:     emacs_meta_keymap,
                     91:     emacs_ctlx_keymap;
1.11      lukem      92:
                     93: int history_base = 1;          /* probably never subject to change */
                     94: int history_length = 0;
                     95: int max_input_history = 0;
                     96: char history_expansion_char = '!';
                     97: char history_subst_char = '^';
1.20      christos   98: char *history_no_expand_chars = expand_chars;
1.11      lukem      99: Function *history_inhibit_expansion_function = NULL;
1.40      christos  100: char *history_arg_extract(int start, int end, const char *str);
1.11      lukem     101:
                    102: int rl_inhibit_completion = 0;
                    103: int rl_attempted_completion_over = 0;
1.20      christos  104: char *rl_basic_word_break_characters = break_chars;
1.11      lukem     105: char *rl_completer_word_break_characters = NULL;
                    106: char *rl_completer_quote_characters = NULL;
1.34      christos  107: Function *rl_completion_entry_function = NULL;
1.11      lukem     108: CPPFunction *rl_attempted_completion_function = NULL;
1.32      christos  109: Function *rl_pre_input_hook = NULL;
                    110: Function *rl_startup1_hook = NULL;
1.72      christos  111: int (*rl_getc_function)(FILE *) = NULL;
1.32      christos  112: char *rl_terminal_name = NULL;
                    113: int rl_already_prompted = 0;
                    114: int rl_filename_completion_desired = 0;
                    115: int rl_ignore_completion_duplicates = 0;
1.39      christos  116: int rl_catch_signals = 1;
1.70      christos  117: int readline_echoing_p = 1;
                    118: int _rl_print_completions_horizontally = 0;
1.32      christos  119: VFunction *rl_redisplay_function = NULL;
1.33      christos  120: Function *rl_startup_hook = NULL;
1.34      christos  121: VFunction *rl_completion_display_matches_hook = NULL;
1.68      christos  122: VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
                    123: VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
1.1       christos  124:
1.12      jdolecek  125: /*
1.32      christos  126:  * The current prompt string.
                    127:  */
                    128: char *rl_prompt = NULL;
                    129: /*
1.12      jdolecek  130:  * This is set to character indicating type of completion being done by
                    131:  * rl_complete_internal(); this is available for application completion
                    132:  * functions.
                    133:  */
                    134: int rl_completion_type = 0;
                    135:
                    136: /*
                    137:  * If more than this number of items results from query for possible
                    138:  * completions, we ask user if they are sure to really display the list.
                    139:  */
                    140: int rl_completion_query_items = 100;
                    141:
                    142: /*
1.15      jdolecek  143:  * List of characters which are word break characters, but should be left
                    144:  * in the parsed text when it is passed to the completion function.
                    145:  * Shell uses this to help determine what kind of completing to do.
1.12      jdolecek  146:  */
1.53      dsl       147: char *rl_special_prefixes = NULL;
1.15      jdolecek  148:
                    149: /*
                    150:  * This is the character appended to the completed words if at the end of
                    151:  * the line. Default is ' ' (a space).
                    152:  */
                    153: int rl_completion_append_character = ' ';
                    154:
                    155: /* stuff below is used internally by libedit for readline emulation */
                    156:
1.1       christos  157: static History *h = NULL;
                    158: static EditLine *e = NULL;
1.35      christos  159: static Function *map[256];
1.70      christos  160: static jmp_buf topbuf;
1.1       christos  161:
                    162: /* internal functions */
1.11      lukem     163: static unsigned char    _el_rl_complete(EditLine *, int);
1.46      christos  164: static unsigned char    _el_rl_tstp(EditLine *, int);
1.11      lukem     165: static char            *_get_prompt(EditLine *);
1.59      christos  166: static int              _getc_function(EditLine *, char *);
1.11      lukem     167: static HIST_ENTRY      *_move_history(int);
1.40      christos  168: static int              _history_expand_command(const char *, size_t, size_t,
                    169:     char **);
1.11      lukem     170: static char            *_rl_compat_sub(const char *, const char *,
1.40      christos  171:     const char *, int);
1.38      christos  172: static int              _rl_event_read_char(EditLine *, char *);
1.49      christos  173: static void             _rl_update_pos(void);
1.1       christos  174:
1.5       christos  175:
                    176: /* ARGSUSED */
1.1       christos  177: static char *
1.30      christos  178: _get_prompt(EditLine *el __attribute__((__unused__)))
1.1       christos  179: {
1.32      christos  180:        rl_already_prompted = 1;
                    181:        return (rl_prompt);
1.1       christos  182: }
                    183:
1.11      lukem     184:
1.1       christos  185: /*
                    186:  * generic function for moving around history
                    187:  */
1.2       christos  188: static HIST_ENTRY *
1.11      lukem     189: _move_history(int op)
1.1       christos  190: {
                    191:        HistEvent ev;
                    192:        static HIST_ENTRY rl_he;
                    193:
                    194:        if (history(h, &ev, op) != 0)
                    195:                return (HIST_ENTRY *) NULL;
                    196:
                    197:        rl_he.line = ev.str;
1.40      christos  198:        rl_he.data = NULL;
1.1       christos  199:
1.11      lukem     200:        return (&rl_he);
1.1       christos  201: }
                    202:
                    203:
1.7       simonb    204: /*
1.59      christos  205:  * read one key from user defined input function
                    206:  */
                    207: static int
1.61      christos  208: /*ARGSUSED*/
1.59      christos  209: _getc_function(EditLine *el, char *c)
                    210: {
                    211:        int i;
                    212:
1.72      christos  213:        i = (*rl_getc_function)(NULL);
1.59      christos  214:        if (i == -1)
                    215:                return 0;
                    216:        *c = i;
                    217:        return 1;
                    218: }
                    219:
                    220:
                    221: /*
1.7       simonb    222:  * READLINE compatibility stuff
1.1       christos  223:  */
                    224:
                    225: /*
                    226:  * initialize rl compat stuff
                    227:  */
                    228: int
1.11      lukem     229: rl_initialize(void)
1.1       christos  230: {
                    231:        HistEvent ev;
                    232:        const LineInfo *li;
1.18      christos  233:        int editmode = 1;
                    234:        struct termios t;
1.1       christos  235:
                    236:        if (e != NULL)
                    237:                el_end(e);
                    238:        if (h != NULL)
                    239:                history_end(h);
                    240:
                    241:        if (!rl_instream)
                    242:                rl_instream = stdin;
                    243:        if (!rl_outstream)
                    244:                rl_outstream = stdout;
1.18      christos  245:
                    246:        /*
                    247:         * See if we don't really want to run the editor
                    248:         */
                    249:        if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
                    250:                editmode = 0;
                    251:
1.4       christos  252:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.18      christos  253:
                    254:        if (!editmode)
                    255:                el_set(e, EL_EDITMODE, 0);
1.1       christos  256:
                    257:        h = history_init();
                    258:        if (!e || !h)
1.11      lukem     259:                return (-1);
1.1       christos  260:
1.4       christos  261:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  262:        history_length = 0;
                    263:        max_input_history = INT_MAX;
                    264:        el_set(e, EL_HIST, history, h);
                    265:
1.59      christos  266:        /* setup getc function if valid */
                    267:        if (rl_getc_function)
                    268:                el_set(e, EL_GETCFN, _getc_function);
                    269:
1.1       christos  270:        /* for proper prompt printing in readline() */
1.32      christos  271:        rl_prompt = strdup("");
                    272:        if (rl_prompt == NULL) {
1.23      christos  273:                history_end(h);
                    274:                el_end(e);
                    275:                return -1;
                    276:        }
1.1       christos  277:        el_set(e, EL_PROMPT, _get_prompt);
1.39      christos  278:        el_set(e, EL_SIGNAL, rl_catch_signals);
1.1       christos  279:
                    280:        /* set default mode to "emacs"-style and read setting afterwards */
                    281:        /* so this can be overriden */
                    282:        el_set(e, EL_EDITOR, "emacs");
1.32      christos  283:        if (rl_terminal_name != NULL)
                    284:                el_set(e, EL_TERMINAL, rl_terminal_name);
                    285:        else
                    286:                el_get(e, EL_TERMINAL, &rl_terminal_name);
1.1       christos  287:
1.12      jdolecek  288:        /*
1.35      christos  289:         * Word completion - this has to go AFTER rebinding keys
1.12      jdolecek  290:         * to emacs-style.
                    291:         */
1.1       christos  292:        el_set(e, EL_ADDFN, "rl_complete",
1.35      christos  293:            "ReadLine compatible completion function",
1.11      lukem     294:            _el_rl_complete);
1.1       christos  295:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
1.46      christos  296:
                    297:        /*
                    298:         * Send TSTP when ^Z is pressed.
                    299:         */
                    300:        el_set(e, EL_ADDFN, "rl_tstp",
                    301:            "ReadLine compatible suspend function",
                    302:            _el_rl_tstp);
                    303:        el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
1.12      jdolecek  304:
1.1       christos  305:        /* read settings from configuration file */
                    306:        el_source(e, NULL);
                    307:
1.12      jdolecek  308:        /*
                    309:         * Unfortunately, some applications really do use rl_point
                    310:         * and rl_line_buffer directly.
                    311:         */
1.1       christos  312:        li = el_line(e);
1.20      christos  313:        /* a cheesy way to get rid of const cast. */
                    314:        rl_line_buffer = memchr(li->buffer, *li->buffer, 1);
1.49      christos  315:        _rl_update_pos();
1.1       christos  316:
1.32      christos  317:        if (rl_startup_hook)
                    318:                (*rl_startup_hook)(NULL, 0);
                    319:
1.11      lukem     320:        return (0);
1.1       christos  321: }
                    322:
1.11      lukem     323:
1.1       christos  324: /*
                    325:  * read one line from input stream and return it, chomping
                    326:  * trailing newline (if there is any)
                    327:  */
                    328: char *
1.70      christos  329: readline(const char *p)
1.1       christos  330: {
                    331:        HistEvent ev;
1.70      christos  332:        const char * volatile prompt = p;
1.3       thorpej   333:        int count;
1.1       christos  334:        const char *ret;
1.20      christos  335:        char *buf;
1.38      christos  336:        static int used_event_hook;
1.1       christos  337:
                    338:        if (e == NULL || h == NULL)
                    339:                rl_initialize();
                    340:
1.38      christos  341:        rl_done = 0;
                    342:
1.70      christos  343:        (void)setjmp(topbuf);
                    344:
1.9       jdolecek  345:        /* update prompt accordingly to what has been passed */
1.11      lukem     346:        if (!prompt)
                    347:                prompt = "";
1.32      christos  348:        if (strcmp(rl_prompt, prompt) != 0) {
                    349:                free(rl_prompt);
                    350:                rl_prompt = strdup(prompt);
                    351:                if (rl_prompt == NULL)
1.23      christos  352:                        return NULL;
1.1       christos  353:        }
1.32      christos  354:
                    355:        if (rl_pre_input_hook)
                    356:                (*rl_pre_input_hook)(NULL, 0);
                    357:
1.38      christos  358:        if (rl_event_hook && !(e->el_flags&NO_TTY)) {
                    359:                el_set(e, EL_GETCFN, _rl_event_read_char);
                    360:                used_event_hook = 1;
                    361:        }
                    362:
                    363:        if (!rl_event_hook && used_event_hook) {
                    364:                el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
                    365:                used_event_hook = 0;
                    366:        }
                    367:
1.32      christos  368:        rl_already_prompted = 0;
                    369:
1.1       christos  370:        /* get one line from input stream */
                    371:        ret = el_gets(e, &count);
                    372:
                    373:        if (ret && count > 0) {
1.5       christos  374:                int lastidx;
1.1       christos  375:
1.20      christos  376:                buf = strdup(ret);
1.23      christos  377:                if (buf == NULL)
                    378:                        return NULL;
1.1       christos  379:                lastidx = count - 1;
1.20      christos  380:                if (buf[lastidx] == '\n')
                    381:                        buf[lastidx] = '\0';
1.1       christos  382:        } else
1.20      christos  383:                buf = NULL;
1.1       christos  384:
                    385:        history(h, &ev, H_GETSIZE);
                    386:        history_length = ev.num;
                    387:
1.20      christos  388:        return buf;
1.1       christos  389: }
                    390:
                    391: /*
                    392:  * history functions
                    393:  */
                    394:
                    395: /*
                    396:  * is normally called before application starts to use
                    397:  * history expansion functions
                    398:  */
                    399: void
1.11      lukem     400: using_history(void)
1.1       christos  401: {
                    402:        if (h == NULL || e == NULL)
                    403:                rl_initialize();
                    404: }
                    405:
1.11      lukem     406:
1.1       christos  407: /*
                    408:  * substitute ``what'' with ``with'', returning resulting string; if
1.29      wiz       409:  * globally == 1, substitutes all occurrences of what, otherwise only the
1.1       christos  410:  * first one
                    411:  */
1.11      lukem     412: static char *
                    413: _rl_compat_sub(const char *str, const char *what, const char *with,
                    414:     int globally)
                    415: {
1.40      christos  416:        const   char    *s;
                    417:        char    *r, *result;
                    418:        size_t  len, with_len, what_len;
1.1       christos  419:
1.40      christos  420:        len = strlen(str);
                    421:        with_len = strlen(with);
                    422:        what_len = strlen(what);
                    423:
                    424:        /* calculate length we need for result */
                    425:        s = str;
                    426:        while (*s) {
                    427:                if (*s == *what && !strncmp(s, what, what_len)) {
                    428:                        len += with_len - what_len;
                    429:                        if (!globally)
                    430:                                break;
                    431:                        s += what_len;
                    432:                } else
                    433:                        s++;
                    434:        }
                    435:        r = result = malloc(len + 1);
1.23      christos  436:        if (result == NULL)
                    437:                return NULL;
1.40      christos  438:        s = str;
                    439:        while (*s) {
                    440:                if (*s == *what && !strncmp(s, what, what_len)) {
                    441:                        (void)strncpy(r, with, with_len);
                    442:                        r += with_len;
                    443:                        s += what_len;
                    444:                        if (!globally) {
                    445:                                (void)strcpy(r, s);
                    446:                                return(result);
1.1       christos  447:                        }
1.40      christos  448:                } else
                    449:                        *r++ = *s++;
                    450:        }
                    451:        *r = 0;
                    452:        return(result);
                    453: }
                    454:
                    455: static char    *last_search_pat;       /* last !?pat[?] search pattern */
                    456: static char    *last_search_match;     /* last !?pat[?] that matched */
                    457:
                    458: const char *
                    459: get_history_event(const char *cmd, int *cindex, int qchar)
                    460: {
                    461:        int idx, sign, sub, num, begin, ret;
                    462:        size_t len;
                    463:        char    *pat;
                    464:        const char *rptr;
                    465:        HistEvent ev;
                    466:
                    467:        idx = *cindex;
                    468:        if (cmd[idx++] != history_expansion_char)
                    469:                return(NULL);
                    470:
                    471:        /* find out which event to take */
                    472:        if (cmd[idx] == history_expansion_char || cmd[idx] == 0) {
                    473:                if (history(h, &ev, H_FIRST) != 0)
                    474:                        return(NULL);
                    475:                *cindex = cmd[idx]? (idx + 1):idx;
                    476:                return(ev.str);
                    477:        }
                    478:        sign = 0;
                    479:        if (cmd[idx] == '-') {
                    480:                sign = 1;
                    481:                idx++;
                    482:        }
                    483:
                    484:        if ('0' <= cmd[idx] && cmd[idx] <= '9') {
                    485:                HIST_ENTRY *rl_he;
                    486:
                    487:                num = 0;
                    488:                while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
                    489:                        num = num * 10 + cmd[idx] - '0';
                    490:                        idx++;
                    491:                }
                    492:                if (sign)
                    493:                        num = history_length - num + 1;
                    494:
                    495:                if (!(rl_he = history_get(num)))
                    496:                        return(NULL);
                    497:
                    498:                *cindex = idx;
                    499:                return(rl_he->line);
                    500:        }
                    501:        sub = 0;
                    502:        if (cmd[idx] == '?') {
                    503:                sub = 1;
                    504:                idx++;
                    505:        }
                    506:        begin = idx;
                    507:        while (cmd[idx]) {
                    508:                if (cmd[idx] == '\n')
                    509:                        break;
                    510:                if (sub && cmd[idx] == '?')
                    511:                        break;
                    512:                if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
                    513:                                    || cmd[idx] == '\t' || cmd[idx] == qchar))
                    514:                        break;
                    515:                idx++;
                    516:        }
                    517:        len = idx - begin;
                    518:        if (sub && cmd[idx] == '?')
                    519:                idx++;
                    520:        if (sub && len == 0 && last_search_pat && *last_search_pat)
                    521:                pat = last_search_pat;
                    522:        else if (len == 0)
                    523:                return(NULL);
                    524:        else {
                    525:                if ((pat = malloc(len + 1)) == NULL)
                    526:                        return NULL;
                    527:                (void)strncpy(pat, cmd + begin, len);
                    528:                pat[len] = '\0';
                    529:        }
                    530:
                    531:        if (history(h, &ev, H_CURR) != 0) {
                    532:                if (pat != last_search_pat)
                    533:                        free(pat);
                    534:                return (NULL);
                    535:        }
                    536:        num = ev.num;
                    537:
                    538:        if (sub) {
                    539:                if (pat != last_search_pat) {
                    540:                        if (last_search_pat)
                    541:                                free(last_search_pat);
                    542:                        last_search_pat = pat;
1.1       christos  543:                }
1.40      christos  544:                ret = history_search(pat, -1);
                    545:        } else
                    546:                ret = history_search_prefix(pat, -1);
                    547:
                    548:        if (ret == -1) {
                    549:                /* restore to end of list on failed search */
                    550:                history(h, &ev, H_FIRST);
                    551:                (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
                    552:                if (pat != last_search_pat)
                    553:                        free(pat);
                    554:                return(NULL);
                    555:        }
                    556:
                    557:        if (sub && len) {
                    558:                if (last_search_match && last_search_match != pat)
                    559:                        free(last_search_match);
                    560:                last_search_match = pat;
                    561:        }
                    562:
                    563:        if (pat != last_search_pat)
                    564:                free(pat);
                    565:
                    566:        if (history(h, &ev, H_CURR) != 0)
                    567:                return(NULL);
                    568:        *cindex = idx;
                    569:        rptr = ev.str;
                    570:
                    571:        /* roll back to original position */
                    572:        (void)history(h, &ev, H_SET, num);
1.1       christos  573:
1.40      christos  574:        return rptr;
1.1       christos  575: }
                    576:
                    577: /*
                    578:  * the real function doing history expansion - takes as argument command
                    579:  * to do and data upon which the command should be executed
                    580:  * does expansion the way I've understood readline documentation
                    581:  *
                    582:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    583:  * should be only printed and not executed; in case of error,
                    584:  * returns -1 and *result points to NULL
                    585:  * it's callers responsibility to free() string returned in *result
                    586:  */
                    587: static int
1.40      christos  588: _history_expand_command(const char *command, size_t offs, size_t cmdlen,
                    589:     char **result)
1.11      lukem     590: {
1.40      christos  591:        char *tmp, *search = NULL, *aptr;
                    592:        const char *ptr, *cmd;
1.11      lukem     593:        static char *from = NULL, *to = NULL;
1.40      christos  594:        int start, end, idx, has_mods = 0;
                    595:        int p_on = 0, g_on = 0;
1.1       christos  596:
                    597:        *result = NULL;
1.40      christos  598:        aptr = NULL;
1.41      christos  599:        ptr = NULL;
1.1       christos  600:
1.40      christos  601:        /* First get event specifier */
                    602:        idx = 0;
1.1       christos  603:
1.40      christos  604:        if (strchr(":^*$", command[offs + 1])) {
                    605:                char str[4];
                    606:                /*
                    607:                * "!:" is shorthand for "!!:".
                    608:                * "!^", "!*" and "!$" are shorthand for
                    609:                * "!!:^", "!!:*" and "!!:$" respectively.
                    610:                */
                    611:                str[0] = str[1] = '!';
                    612:                str[2] = '0';
                    613:                ptr = get_history_event(str, &idx, 0);
                    614:                idx = (command[offs + 1] == ':')? 1:0;
                    615:                has_mods = 1;
1.1       christos  616:        } else {
1.40      christos  617:                if (command[offs + 1] == '#') {
                    618:                        /* use command so far */
                    619:                        if ((aptr = malloc(offs + 1)) == NULL)
                    620:                                return -1;
                    621:                        (void)strncpy(aptr, command, offs);
                    622:                        aptr[offs] = '\0';
                    623:                        idx = 1;
1.1       christos  624:                } else {
1.40      christos  625:                        int     qchar;
                    626:
                    627:                        qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
                    628:                        ptr = get_history_event(command + offs, &idx, qchar);
                    629:                }
                    630:                has_mods = command[offs + idx] == ':';
                    631:        }
1.1       christos  632:
1.40      christos  633:        if (ptr == NULL && aptr == NULL)
                    634:                return(-1);
1.1       christos  635:
1.40      christos  636:        if (!has_mods) {
                    637:                *result = strdup(aptr? aptr : ptr);
                    638:                if (aptr)
                    639:                        free(aptr);
                    640:                return(1);
                    641:        }
                    642:
                    643:        cmd = command + offs + idx + 1;
                    644:
                    645:        /* Now parse any word designators */
                    646:
                    647:        if (*cmd == '%')        /* last word matched by ?pat? */
                    648:                tmp = strdup(last_search_match? last_search_match:"");
                    649:        else if (strchr("^*$-0123456789", *cmd)) {
                    650:                start = end = -1;
                    651:                if (*cmd == '^')
                    652:                        start = end = 1, cmd++;
                    653:                else if (*cmd == '$')
                    654:                        start = -1, cmd++;
                    655:                else if (*cmd == '*')
                    656:                        start = 1, cmd++;
                    657:               else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
                    658:                        start = 0;
                    659:                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    660:                                start = start * 10 + *cmd++ - '0';
                    661:
                    662:                        if (*cmd == '-') {
                    663:                                if (isdigit((unsigned char) cmd[1])) {
                    664:                                        cmd++;
                    665:                                        end = 0;
                    666:                                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    667:                                                end = end * 10 + *cmd++ - '0';
                    668:                                } else if (cmd[1] == '$') {
                    669:                                        cmd += 2;
                    670:                                        end = -1;
                    671:                                } else {
                    672:                                        cmd++;
                    673:                                        end = -2;
                    674:                                }
                    675:                        } else if (*cmd == '*')
                    676:                                end = -1, cmd++;
1.1       christos  677:                        else
1.40      christos  678:                                end = start;
                    679:                }
                    680:                tmp = history_arg_extract(start, end, aptr? aptr:ptr);
                    681:                if (tmp == NULL) {
                    682:                        (void)fprintf(rl_outstream, "%s: Bad word specifier",
                    683:                            command + offs + idx);
                    684:                        if (aptr)
                    685:                                free(aptr);
                    686:                        return(-1);
                    687:                }
                    688:        } else
                    689:                tmp = strdup(aptr? aptr:ptr);
1.1       christos  690:
1.40      christos  691:        if (aptr)
                    692:                free(aptr);
1.1       christos  693:
1.40      christos  694:        if (*cmd == 0 || (cmd - (command + offs) >= cmdlen)) {
                    695:                *result = tmp;
                    696:                return(1);
1.1       christos  697:        }
                    698:
                    699:        for (; *cmd; cmd++) {
                    700:                if (*cmd == ':')
                    701:                        continue;
1.40      christos  702:                else if (*cmd == 'h') {         /* remove trailing path */
                    703:                        if ((aptr = strrchr(tmp, '/')) != NULL)
                    704:                                *aptr = 0;
                    705:                } else if (*cmd == 't') {       /* remove leading path */
                    706:                        if ((aptr = strrchr(tmp, '/')) != NULL) {
                    707:                                aptr = strdup(aptr + 1);
                    708:                                free(tmp);
                    709:                                tmp = aptr;
                    710:                        }
                    711:                } else if (*cmd == 'r') {       /* remove trailing suffix */
                    712:                        if ((aptr = strrchr(tmp, '.')) != NULL)
                    713:                                *aptr = 0;
                    714:                } else if (*cmd == 'e') {       /* remove all but suffix */
                    715:                        if ((aptr = strrchr(tmp, '.')) != NULL) {
                    716:                                aptr = strdup(aptr);
                    717:                                free(tmp);
                    718:                                tmp = aptr;
                    719:                        }
                    720:                } else if (*cmd == 'p')         /* print only */
                    721:                        p_on = 1;
1.1       christos  722:                else if (*cmd == 'g')
                    723:                        g_on = 2;
                    724:                else if (*cmd == 's' || *cmd == '&') {
1.11      lukem     725:                        char *what, *with, delim;
1.30      christos  726:                        size_t len, from_len;
1.5       christos  727:                        size_t size;
1.1       christos  728:
                    729:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    730:                                continue;
                    731:                        else if (*cmd == 's') {
                    732:                                delim = *(++cmd), cmd++;
                    733:                                size = 16;
1.5       christos  734:                                what = realloc(from, size);
1.23      christos  735:                                if (what == NULL) {
                    736:                                        free(from);
1.62      christos  737:                                        free(tmp);
1.28      christos  738:                                        return 0;
1.23      christos  739:                                }
1.1       christos  740:                                len = 0;
                    741:                                for (; *cmd && *cmd != delim; cmd++) {
1.40      christos  742:                                        if (*cmd == '\\' && cmd[1] == delim)
1.1       christos  743:                                                cmd++;
1.23      christos  744:                                        if (len >= size) {
                    745:                                                char *nwhat;
                    746:                                                nwhat = realloc(what,
1.40      christos  747:                                                                (size <<= 1));
1.23      christos  748:                                                if (nwhat == NULL) {
                    749:                                                        free(what);
1.62      christos  750:                                                        free(tmp);
1.28      christos  751:                                                        return 0;
1.23      christos  752:                                                }
                    753:                                                what = nwhat;
                    754:                                        }
1.1       christos  755:                                        what[len++] = *cmd;
                    756:                                }
                    757:                                what[len] = '\0';
                    758:                                from = what;
                    759:                                if (*what == '\0') {
                    760:                                        free(what);
1.23      christos  761:                                        if (search) {
1.1       christos  762:                                                from = strdup(search);
1.62      christos  763:                                                if (from == NULL) {
                    764:                                                        free(tmp);
1.28      christos  765:                                                        return 0;
1.62      christos  766:                                                }
1.23      christos  767:                                        } else {
1.1       christos  768:                                                from = NULL;
1.62      christos  769:                                                free(tmp);
1.11      lukem     770:                                                return (-1);
1.1       christos  771:                                        }
                    772:                                }
                    773:                                cmd++;  /* shift after delim */
                    774:                                if (!*cmd)
                    775:                                        continue;
                    776:
                    777:                                size = 16;
1.5       christos  778:                                with = realloc(to, size);
1.23      christos  779:                                if (with == NULL) {
                    780:                                        free(to);
1.62      christos  781:                                        free(tmp);
1.23      christos  782:                                        return -1;
                    783:                                }
1.1       christos  784:                                len = 0;
                    785:                                from_len = strlen(from);
                    786:                                for (; *cmd && *cmd != delim; cmd++) {
                    787:                                        if (len + from_len + 1 >= size) {
1.23      christos  788:                                                char *nwith;
1.1       christos  789:                                                size += from_len + 1;
1.23      christos  790:                                                nwith = realloc(with, size);
                    791:                                                if (nwith == NULL) {
                    792:                                                        free(with);
1.62      christos  793:                                                        free(tmp);
1.23      christos  794:                                                        return -1;
                    795:                                                }
                    796:                                                with = nwith;
1.1       christos  797:                                        }
                    798:                                        if (*cmd == '&') {
                    799:                                                /* safe */
1.40      christos  800:                                                (void)strcpy(&with[len], from);
1.1       christos  801:                                                len += from_len;
                    802:                                                continue;
                    803:                                        }
                    804:                                        if (*cmd == '\\'
                    805:                                            && (*(cmd + 1) == delim
                    806:                                                || *(cmd + 1) == '&'))
                    807:                                                cmd++;
                    808:                                        with[len++] = *cmd;
                    809:                                }
                    810:                                with[len] = '\0';
                    811:                                to = with;
                    812:                        }
                    813:
1.40      christos  814:                        aptr = _rl_compat_sub(tmp, from, to, g_on);
                    815:                        if (aptr) {
                    816:                                free(tmp);
                    817:                                tmp = aptr;
1.23      christos  818:                        }
1.40      christos  819:                        g_on = 0;
1.1       christos  820:                }
1.5       christos  821:        }
1.40      christos  822:        *result = tmp;
                    823:        return (p_on? 2:1);
1.1       christos  824: }
                    825:
1.11      lukem     826:
1.1       christos  827: /*
                    828:  * csh-style history expansion
                    829:  */
                    830: int
1.11      lukem     831: history_expand(char *str, char **output)
                    832: {
1.40      christos  833:        int ret = 0;
                    834:        size_t idx, i, size;
                    835:        char *tmp, *result;
1.1       christos  836:
                    837:        if (h == NULL || e == NULL)
                    838:                rl_initialize();
                    839:
1.40      christos  840:        if (history_expansion_char == 0) {
                    841:                *output = strdup(str);
                    842:                return(0);
                    843:        }
1.1       christos  844:
1.40      christos  845:        *output = NULL;
1.1       christos  846:        if (str[0] == history_subst_char) {
                    847:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
1.40      christos  848:                *output = malloc(strlen(str) + 4 + 1);
                    849:                if (*output == NULL)
                    850:                        return 0;
                    851:                (*output)[0] = (*output)[1] = history_expansion_char;
                    852:                (*output)[2] = ':';
                    853:                (*output)[3] = 's';
                    854:                (void)strcpy((*output) + 4, str);
                    855:                str = *output;
                    856:        } else {
                    857:                *output = strdup(str);
                    858:                if (*output == NULL)
                    859:                        return 0;
1.1       christos  860:        }
1.40      christos  861:
1.63      christos  862: #define ADD_STRING(what, len, fr)                                      \
1.1       christos  863:        {                                                               \
1.23      christos  864:                if (idx + len + 1 > size) {                             \
                    865:                        char *nresult = realloc(result, (size += len + 1));\
                    866:                        if (nresult == NULL) {                          \
                    867:                                free(*output);                          \
1.65      christos  868:                                if (/*CONSTCOND*/fr)                    \
1.63      christos  869:                                        free(tmp);                      \
1.28      christos  870:                                return 0;                               \
1.23      christos  871:                        }                                               \
                    872:                        result = nresult;                               \
                    873:                }                                                       \
1.1       christos  874:                (void)strncpy(&result[idx], what, len);                 \
                    875:                idx += len;                                             \
                    876:                result[idx] = '\0';                                     \
                    877:        }
                    878:
                    879:        result = NULL;
                    880:        size = idx = 0;
1.64      christos  881:        tmp = NULL;
1.1       christos  882:        for (i = 0; str[i];) {
1.40      christos  883:                int qchar, loop_again;
                    884:                size_t len, start, j;
1.1       christos  885:
1.40      christos  886:                qchar = 0;
1.1       christos  887:                loop_again = 1;
                    888:                start = j = i;
                    889: loop:
                    890:                for (; str[j]; j++) {
                    891:                        if (str[j] == '\\' &&
                    892:                            str[j + 1] == history_expansion_char) {
1.40      christos  893:                                (void)strcpy(&str[j], &str[j + 1]);
1.1       christos  894:                                continue;
                    895:                        }
                    896:                        if (!loop_again) {
1.40      christos  897:                                if (isspace((unsigned char) str[j])
                    898:                                    || str[j] == qchar)
1.1       christos  899:                                        break;
                    900:                        }
                    901:                        if (str[j] == history_expansion_char
                    902:                            && !strchr(history_no_expand_chars, str[j + 1])
                    903:                            && (!history_inhibit_expansion_function ||
1.40      christos  904:                            (*history_inhibit_expansion_function)(str,
                    905:                            (int)j) == 0))
1.1       christos  906:                                break;
                    907:                }
                    908:
1.40      christos  909:                if (str[j] && loop_again) {
1.1       christos  910:                        i = j;
1.40      christos  911:                        qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
1.1       christos  912:                        j++;
                    913:                        if (str[j] == history_expansion_char)
                    914:                                j++;
                    915:                        loop_again = 0;
                    916:                        goto loop;
                    917:                }
                    918:                len = i - start;
1.64      christos  919:                ADD_STRING(&str[start], len, 0);
1.1       christos  920:
1.40      christos  921:                if (str[i] == '\0' || str[i] != history_expansion_char) {
1.1       christos  922:                        len = j - i;
1.64      christos  923:                        ADD_STRING(&str[i], len, 0);
1.1       christos  924:                        if (start == 0)
1.40      christos  925:                                ret = 0;
1.1       christos  926:                        else
1.40      christos  927:                                ret = 1;
1.1       christos  928:                        break;
                    929:                }
1.40      christos  930:                ret = _history_expand_command (str, i, (j - i), &tmp);
                    931:                if (ret > 0 && tmp) {
                    932:                        len = strlen(tmp);
1.63      christos  933:                        ADD_STRING(tmp, len, 1);
1.66      christos  934:                }
                    935:                if (tmp) {
1.40      christos  936:                        free(tmp);
1.64      christos  937:                        tmp = NULL;
1.1       christos  938:                }
                    939:                i = j;
1.40      christos  940:        }
1.1       christos  941:
1.40      christos  942:        /* ret is 2 for "print only" option */
                    943:        if (ret == 2) {
                    944:                add_history(result);
1.1       christos  945: #ifdef GDB_411_HACK
                    946:                /* gdb 4.11 has been shipped with readline, where */
                    947:                /* history_expand() returned -1 when the line     */
                    948:                /* should not be executed; in readline 2.1+       */
                    949:                /* it should return 2 in such a case              */
1.40      christos  950:                ret = -1;
1.1       christos  951: #endif
                    952:        }
                    953:        free(*output);
                    954:        *output = result;
                    955:
1.40      christos  956:        return (ret);
1.1       christos  957: }
                    958:
1.40      christos  959: /*
                    960: * Return a string consisting of arguments of "str" from "start" to "end".
                    961: */
                    962: char *
                    963: history_arg_extract(int start, int end, const char *str)
                    964: {
                    965:        size_t  i, len, max;
                    966:        char    **arr, *result;
                    967:
                    968:        arr = history_tokenize(str);
                    969:        if (!arr)
                    970:                return(NULL);
                    971:        if (arr && *arr == NULL) {
                    972:                free(arr);
                    973:                return(NULL);
                    974:        }
                    975:
                    976:        for (max = 0; arr[max]; max++)
                    977:                continue;
                    978:        max--;
                    979:
                    980:        if (start == '$')
                    981:                start = max;
                    982:        if (end == '$')
                    983:                end = max;
                    984:        if (end < 0)
                    985:                end = max + end + 1;
                    986:        if (start < 0)
                    987:                start = end;
                    988:
                    989:        if (start < 0 || end < 0 || start > max || end > max || start > end)
                    990:                return(NULL);
                    991:
                    992:        for (i = start, len = 0; i <= end; i++)
                    993:                len += strlen(arr[i]) + 1;
                    994:        len++;
                    995:        result = malloc(len);
                    996:        if (result == NULL)
                    997:                return NULL;
                    998:
                    999:        for (i = start, len = 0; i <= end; i++) {
                   1000:                (void)strcpy(result + len, arr[i]);
                   1001:                len += strlen(arr[i]);
                   1002:                if (i < end)
                   1003:                        result[len++] = ' ';
                   1004:        }
                   1005:        result[len] = 0;
                   1006:
                   1007:        for (i = 0; arr[i]; i++)
                   1008:                free(arr[i]);
                   1009:        free(arr);
                   1010:
                   1011:        return(result);
                   1012: }
1.11      lukem    1013:
1.1       christos 1014: /*
1.40      christos 1015:  * Parse the string into individual tokens,
                   1016:  * similar to how shell would do it.
1.1       christos 1017:  */
                   1018: char **
1.11      lukem    1019: history_tokenize(const char *str)
1.1       christos 1020: {
1.40      christos 1021:        int size = 1, idx = 0, i, start;
1.5       christos 1022:        size_t len;
1.1       christos 1023:        char **result = NULL, *temp, delim = '\0';
                   1024:
1.40      christos 1025:        for (i = 0; str[i];) {
1.4       christos 1026:                while (isspace((unsigned char) str[i]))
1.1       christos 1027:                        i++;
                   1028:                start = i;
1.40      christos 1029:                for (; str[i];) {
1.9       jdolecek 1030:                        if (str[i] == '\\') {
1.14      jdolecek 1031:                                if (str[i+1] != '\0')
1.9       jdolecek 1032:                                        i++;
                   1033:                        } else if (str[i] == delim)
1.1       christos 1034:                                delim = '\0';
                   1035:                        else if (!delim &&
1.11      lukem    1036:                                    (isspace((unsigned char) str[i]) ||
                   1037:                                strchr("()<>;&|$", str[i])))
1.1       christos 1038:                                break;
                   1039:                        else if (!delim && strchr("'`\"", str[i]))
                   1040:                                delim = str[i];
1.40      christos 1041:                        if (str[i])
                   1042:                                i++;
1.1       christos 1043:                }
                   1044:
1.40      christos 1045:                if (idx + 2 >= size) {
1.23      christos 1046:                        char **nresult;
1.1       christos 1047:                        size <<= 1;
1.23      christos 1048:                        nresult = realloc(result, size * sizeof(char *));
                   1049:                        if (nresult == NULL) {
                   1050:                                free(result);
                   1051:                                return NULL;
                   1052:                        }
                   1053:                        result = nresult;
1.1       christos 1054:                }
                   1055:                len = i - start;
                   1056:                temp = malloc(len + 1);
1.23      christos 1057:                if (temp == NULL) {
1.40      christos 1058:                        for (i = 0; i < idx; i++)
                   1059:                                free(result[i]);
1.23      christos 1060:                        free(result);
                   1061:                        return NULL;
                   1062:                }
1.40      christos 1063:                (void)strncpy(temp, &str[start], len);
1.1       christos 1064:                temp[len] = '\0';
1.40      christos 1065:                result[idx++] = temp;
                   1066:                result[idx] = NULL;
                   1067:                if (str[i])
                   1068:                        i++;
1.1       christos 1069:        }
1.11      lukem    1070:        return (result);
1.1       christos 1071: }
                   1072:
1.11      lukem    1073:
1.1       christos 1074: /*
                   1075:  * limit size of history record to ``max'' events
                   1076:  */
                   1077: void
1.11      lukem    1078: stifle_history(int max)
1.1       christos 1079: {
                   1080:        HistEvent ev;
                   1081:
                   1082:        if (h == NULL || e == NULL)
                   1083:                rl_initialize();
                   1084:
1.4       christos 1085:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos 1086:                max_input_history = max;
                   1087: }
                   1088:
1.11      lukem    1089:
1.1       christos 1090: /*
                   1091:  * "unlimit" size of history - set the limit to maximum allowed int value
                   1092:  */
                   1093: int
1.11      lukem    1094: unstifle_history(void)
1.1       christos 1095: {
                   1096:        HistEvent ev;
                   1097:        int omax;
                   1098:
1.4       christos 1099:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos 1100:        omax = max_input_history;
                   1101:        max_input_history = INT_MAX;
1.11      lukem    1102:        return (omax);          /* some value _must_ be returned */
1.1       christos 1103: }
                   1104:
1.11      lukem    1105:
1.1       christos 1106: int
1.11      lukem    1107: history_is_stifled(void)
1.1       christos 1108: {
1.11      lukem    1109:
1.1       christos 1110:        /* cannot return true answer */
                   1111:        return (max_input_history != INT_MAX);
                   1112: }
                   1113:
1.11      lukem    1114:
1.1       christos 1115: /*
                   1116:  * read history from a file given
                   1117:  */
                   1118: int
1.11      lukem    1119: read_history(const char *filename)
1.1       christos 1120: {
                   1121:        HistEvent ev;
                   1122:
                   1123:        if (h == NULL || e == NULL)
                   1124:                rl_initialize();
1.60      christos 1125:        return (history(h, &ev, H_LOAD, filename) == -1);
1.1       christos 1126: }
                   1127:
1.11      lukem    1128:
1.1       christos 1129: /*
                   1130:  * write history to a file given
                   1131:  */
                   1132: int
1.11      lukem    1133: write_history(const char *filename)
1.1       christos 1134: {
                   1135:        HistEvent ev;
                   1136:
                   1137:        if (h == NULL || e == NULL)
                   1138:                rl_initialize();
1.60      christos 1139:        return (history(h, &ev, H_SAVE, filename) == -1);
1.1       christos 1140: }
                   1141:
1.11      lukem    1142:
1.1       christos 1143: /*
                   1144:  * returns history ``num''th event
                   1145:  *
                   1146:  * returned pointer points to static variable
                   1147:  */
1.2       christos 1148: HIST_ENTRY *
1.11      lukem    1149: history_get(int num)
1.1       christos 1150: {
                   1151:        static HIST_ENTRY she;
                   1152:        HistEvent ev;
1.40      christos 1153:        int curr_num;
1.1       christos 1154:
                   1155:        if (h == NULL || e == NULL)
                   1156:                rl_initialize();
                   1157:
1.40      christos 1158:        /* save current position */
1.1       christos 1159:        if (history(h, &ev, H_CURR) != 0)
1.11      lukem    1160:                return (NULL);
1.1       christos 1161:        curr_num = ev.num;
1.40      christos 1162:
                   1163:        /* start from most recent */
                   1164:        if (history(h, &ev, H_FIRST) != 0)
1.11      lukem    1165:                return (NULL);  /* error */
1.40      christos 1166:
                   1167:        /* look backwards for event matching specified offset */
1.72      christos 1168:        if (history(h, &ev, H_NEXT_EVENT, num + 1))
1.40      christos 1169:                return (NULL);
1.1       christos 1170:
                   1171:        she.line = ev.str;
                   1172:        she.data = NULL;
                   1173:
1.40      christos 1174:        /* restore pointer to where it was */
                   1175:        (void)history(h, &ev, H_SET, curr_num);
1.1       christos 1176:
1.11      lukem    1177:        return (&she);
1.1       christos 1178: }
                   1179:
1.11      lukem    1180:
1.1       christos 1181: /*
                   1182:  * add the line to history table
                   1183:  */
                   1184: int
1.11      lukem    1185: add_history(const char *line)
1.1       christos 1186: {
                   1187:        HistEvent ev;
                   1188:
                   1189:        if (h == NULL || e == NULL)
                   1190:                rl_initialize();
                   1191:
1.40      christos 1192:        (void)history(h, &ev, H_ENTER, line);
1.1       christos 1193:        if (history(h, &ev, H_GETSIZE) == 0)
                   1194:                history_length = ev.num;
                   1195:
1.40      christos 1196:        return (!(history_length > 0)); /* return 0 if all is okay */
1.1       christos 1197: }
                   1198:
1.11      lukem    1199:
1.1       christos 1200: /*
1.58      christos 1201:  * remove the specified entry from the history list and return it.
                   1202:  */
                   1203: HIST_ENTRY *
                   1204: remove_history(int num)
                   1205: {
1.71      christos 1206:        HIST_ENTRY *she;
1.58      christos 1207:        HistEvent ev;
                   1208:
                   1209:        if (h == NULL || e == NULL)
                   1210:                rl_initialize();
                   1211:
                   1212:        if (history(h, &ev, H_DEL, num) != 0)
                   1213:                return NULL;
                   1214:
1.71      christos 1215:        if ((she = malloc(sizeof(*she))) == NULL)
                   1216:                return NULL;
                   1217:
                   1218:        she->line = ev.str;
                   1219:        she->data = NULL;
1.58      christos 1220:
1.71      christos 1221:        return she;
1.58      christos 1222: }
                   1223:
                   1224:
                   1225: /*
1.1       christos 1226:  * clear the history list - delete all entries
                   1227:  */
                   1228: void
1.11      lukem    1229: clear_history(void)
1.1       christos 1230: {
                   1231:        HistEvent ev;
1.11      lukem    1232:
1.1       christos 1233:        history(h, &ev, H_CLEAR);
                   1234: }
                   1235:
1.11      lukem    1236:
1.1       christos 1237: /*
                   1238:  * returns offset of the current history event
                   1239:  */
                   1240: int
1.11      lukem    1241: where_history(void)
1.1       christos 1242: {
                   1243:        HistEvent ev;
                   1244:        int curr_num, off;
                   1245:
                   1246:        if (history(h, &ev, H_CURR) != 0)
1.11      lukem    1247:                return (0);
1.1       christos 1248:        curr_num = ev.num;
                   1249:
                   1250:        history(h, &ev, H_FIRST);
                   1251:        off = 1;
                   1252:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
                   1253:                off++;
                   1254:
1.11      lukem    1255:        return (off);
1.1       christos 1256: }
                   1257:
1.11      lukem    1258:
1.1       christos 1259: /*
                   1260:  * returns current history event or NULL if there is no such event
                   1261:  */
1.2       christos 1262: HIST_ENTRY *
1.11      lukem    1263: current_history(void)
1.1       christos 1264: {
1.11      lukem    1265:
                   1266:        return (_move_history(H_CURR));
1.1       christos 1267: }
                   1268:
1.11      lukem    1269:
1.1       christos 1270: /*
                   1271:  * returns total number of bytes history events' data are using
                   1272:  */
                   1273: int
1.11      lukem    1274: history_total_bytes(void)
1.1       christos 1275: {
                   1276:        HistEvent ev;
                   1277:        int curr_num, size;
                   1278:
                   1279:        if (history(h, &ev, H_CURR) != 0)
1.11      lukem    1280:                return (-1);
1.1       christos 1281:        curr_num = ev.num;
                   1282:
                   1283:        history(h, &ev, H_FIRST);
                   1284:        size = 0;
                   1285:        do
                   1286:                size += strlen(ev.str);
                   1287:        while (history(h, &ev, H_NEXT) == 0);
                   1288:
                   1289:        /* get to the same position as before */
                   1290:        history(h, &ev, H_PREV_EVENT, curr_num);
                   1291:
1.11      lukem    1292:        return (size);
1.1       christos 1293: }
                   1294:
1.11      lukem    1295:
1.1       christos 1296: /*
                   1297:  * sets the position in the history list to ``pos''
                   1298:  */
                   1299: int
1.11      lukem    1300: history_set_pos(int pos)
1.1       christos 1301: {
                   1302:        HistEvent ev;
1.40      christos 1303:        int curr_num;
1.1       christos 1304:
                   1305:        if (pos > history_length || pos < 0)
1.11      lukem    1306:                return (-1);
1.1       christos 1307:
                   1308:        history(h, &ev, H_CURR);
                   1309:        curr_num = ev.num;
                   1310:
1.40      christos 1311:        if (history(h, &ev, H_SET, pos)) {
                   1312:                history(h, &ev, H_SET, curr_num);
                   1313:                return(-1);
1.1       christos 1314:        }
1.11      lukem    1315:        return (0);
1.1       christos 1316: }
                   1317:
1.11      lukem    1318:
1.1       christos 1319: /*
                   1320:  * returns previous event in history and shifts pointer accordingly
                   1321:  */
1.2       christos 1322: HIST_ENTRY *
1.11      lukem    1323: previous_history(void)
1.1       christos 1324: {
1.11      lukem    1325:
                   1326:        return (_move_history(H_PREV));
1.1       christos 1327: }
                   1328:
1.11      lukem    1329:
1.1       christos 1330: /*
                   1331:  * returns next event in history and shifts pointer accordingly
                   1332:  */
1.2       christos 1333: HIST_ENTRY *
1.11      lukem    1334: next_history(void)
1.1       christos 1335: {
1.11      lukem    1336:
                   1337:        return (_move_history(H_NEXT));
1.1       christos 1338: }
                   1339:
1.11      lukem    1340:
1.1       christos 1341: /*
1.40      christos 1342:  * searches for first history event containing the str
1.1       christos 1343:  */
1.40      christos 1344: int
                   1345: history_search(const char *str, int direction)
1.11      lukem    1346: {
                   1347:        HistEvent ev;
                   1348:        const char *strp;
                   1349:        int curr_num;
1.1       christos 1350:
                   1351:        if (history(h, &ev, H_CURR) != 0)
1.11      lukem    1352:                return (-1);
1.1       christos 1353:        curr_num = ev.num;
                   1354:
                   1355:        for (;;) {
1.40      christos 1356:                if ((strp = strstr(ev.str, str)) != NULL)
1.1       christos 1357:                        return (int) (strp - ev.str);
1.40      christos 1358:                if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1.1       christos 1359:                        break;
                   1360:        }
1.40      christos 1361:        history(h, &ev, H_SET, curr_num);
1.11      lukem    1362:        return (-1);
1.1       christos 1363: }
                   1364:
1.11      lukem    1365:
1.1       christos 1366: /*
                   1367:  * searches for first history event beginning with str
                   1368:  */
                   1369: int
1.11      lukem    1370: history_search_prefix(const char *str, int direction)
1.1       christos 1371: {
1.40      christos 1372:        HistEvent ev;
1.11      lukem    1373:
1.40      christos 1374:        return (history(h, &ev, direction < 0? H_PREV_STR:H_NEXT_STR, str));
1.1       christos 1375: }
                   1376:
1.11      lukem    1377:
1.1       christos 1378: /*
                   1379:  * search for event in history containing str, starting at offset
                   1380:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1381:  */
1.5       christos 1382: /* ARGSUSED */
1.1       christos 1383: int
1.40      christos 1384: history_search_pos(const char *str,
1.30      christos 1385:                   int direction __attribute__((__unused__)), int pos)
1.1       christos 1386: {
1.11      lukem    1387:        HistEvent ev;
                   1388:        int curr_num, off;
1.1       christos 1389:
                   1390:        off = (pos > 0) ? pos : -pos;
                   1391:        pos = (pos > 0) ? 1 : -1;
                   1392:
                   1393:        if (history(h, &ev, H_CURR) != 0)
1.11      lukem    1394:                return (-1);
1.1       christos 1395:        curr_num = ev.num;
                   1396:
                   1397:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1.11      lukem    1398:                return (-1);
1.1       christos 1399:
                   1400:
                   1401:        for (;;) {
                   1402:                if (strstr(ev.str, str))
1.11      lukem    1403:                        return (off);
1.1       christos 1404:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
                   1405:                        break;
                   1406:        }
                   1407:
                   1408:        /* set "current" pointer back to previous state */
                   1409:        history(h, &ev, (pos < 0) ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
                   1410:
1.11      lukem    1411:        return (-1);
1.1       christos 1412: }
                   1413:
                   1414:
                   1415: /********************************/
1.40      christos 1416: /* completion functions */
1.1       christos 1417:
1.57      christos 1418: char *
                   1419: tilde_expand(char *name)
                   1420: {
                   1421:        return fn_tilde_expand(name);
                   1422: }
                   1423:
                   1424: char *
                   1425: filename_completion_function(const char *name, int state)
                   1426: {
                   1427:        return fn_filename_completion_function(name, state);
                   1428: }
                   1429:
1.1       christos 1430: /*
                   1431:  * a completion generator for usernames; returns _first_ username
                   1432:  * which starts with supplied text
                   1433:  * text contains a partial username preceded by random character
                   1434:  * (usually '~'); state is ignored
                   1435:  * it's callers responsibility to free returned value
                   1436:  */
1.11      lukem    1437: char *
                   1438: username_completion_function(const char *text, int state)
1.1       christos 1439: {
1.50      christos 1440:        struct passwd *pwd, pwres;
                   1441:        char pwbuf[1024];
1.1       christos 1442:
                   1443:        if (text[0] == '\0')
1.11      lukem    1444:                return (NULL);
1.1       christos 1445:
                   1446:        if (*text == '~')
                   1447:                text++;
                   1448:
                   1449:        if (state == 0)
                   1450:                setpwent();
                   1451:
1.50      christos 1452:        while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0
1.52      christos 1453:            && pwd != NULL && text[0] == pwd->pw_name[0]
1.11      lukem    1454:            && strcmp(text, pwd->pw_name) == 0);
1.1       christos 1455:
                   1456:        if (pwd == NULL) {
                   1457:                endpwent();
1.11      lukem    1458:                return (NULL);
1.1       christos 1459:        }
1.11      lukem    1460:        return (strdup(pwd->pw_name));
1.1       christos 1461: }
                   1462:
1.11      lukem    1463:
1.1       christos 1464: /*
1.46      christos 1465:  * el-compatible wrapper to send TSTP on ^Z
                   1466:  */
                   1467: /* ARGSUSED */
                   1468: static unsigned char
                   1469: _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
                   1470: {
                   1471:        (void)kill(0, SIGTSTP);
                   1472:        return CC_NORM;
                   1473: }
1.11      lukem    1474:
1.1       christos 1475: /*
1.12      jdolecek 1476:  * Display list of strings in columnar format on readline's output stream.
                   1477:  * 'matches' is list of strings, 'len' is number of strings in 'matches',
                   1478:  * 'max' is maximum length of string in 'matches'.
                   1479:  */
                   1480: void
1.53      dsl      1481: rl_display_match_list(char **matches, int len, int max)
1.12      jdolecek 1482: {
                   1483:
1.53      dsl      1484:        fn_display_match_list(e, matches, len, max);
1.1       christos 1485: }
                   1486:
1.56      christos 1487: static const char *
                   1488: /*ARGSUSED*/
                   1489: _rl_completion_append_character_function(const char *dummy
                   1490:     __attribute__((__unused__)))
                   1491: {
                   1492:        static char buf[2];
                   1493:        buf[1] = rl_completion_append_character;
                   1494:        return buf;
                   1495: }
                   1496:
1.11      lukem    1497:
1.1       christos 1498: /*
                   1499:  * complete word at current point
                   1500:  */
1.53      dsl      1501: /* ARGSUSED */
1.1       christos 1502: int
1.53      dsl      1503: rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1.1       christos 1504: {
                   1505:        if (h == NULL || e == NULL)
                   1506:                rl_initialize();
                   1507:
                   1508:        if (rl_inhibit_completion) {
1.47      christos 1509:                char arr[2];
                   1510:                arr[0] = (char)invoking_key;
                   1511:                arr[1] = '\0';
                   1512:                el_insertstr(e, arr);
1.11      lukem    1513:                return (CC_REFRESH);
1.53      dsl      1514:        }
                   1515:
                   1516:        /* Just look at how many global variables modify this operation! */
                   1517:        return fn_complete(e,
                   1518:            (CPFunction *)rl_completion_entry_function,
                   1519:            rl_attempted_completion_function,
                   1520:            rl_basic_word_break_characters, rl_special_prefixes,
1.56      christos 1521:            _rl_completion_append_character_function, rl_completion_query_items,
1.53      dsl      1522:            &rl_completion_type, &rl_attempted_completion_over,
                   1523:            &rl_point, &rl_end);
1.1       christos 1524: }
                   1525:
1.11      lukem    1526:
1.53      dsl      1527: /* ARGSUSED */
                   1528: static unsigned char
                   1529: _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
                   1530: {
                   1531:        return (unsigned char)rl_complete(0, ch);
                   1532: }
                   1533:
1.1       christos 1534: /*
1.7       simonb   1535:  * misc other functions
1.1       christos 1536:  */
                   1537:
                   1538: /*
                   1539:  * bind key c to readline-type function func
                   1540:  */
                   1541: int
1.11      lukem    1542: rl_bind_key(int c, int func(int, int))
1.1       christos 1543: {
1.11      lukem    1544:        int retval = -1;
1.1       christos 1545:
                   1546:        if (h == NULL || e == NULL)
                   1547:                rl_initialize();
                   1548:
                   1549:        if (func == rl_insert) {
                   1550:                /* XXX notice there is no range checking of ``c'' */
                   1551:                e->el_map.key[c] = ED_INSERT;
                   1552:                retval = 0;
                   1553:        }
1.11      lukem    1554:        return (retval);
1.1       christos 1555: }
                   1556:
1.11      lukem    1557:
1.1       christos 1558: /*
                   1559:  * read one key from input - handles chars pushed back
                   1560:  * to input stream also
                   1561:  */
                   1562: int
1.11      lukem    1563: rl_read_key(void)
1.1       christos 1564: {
1.11      lukem    1565:        char fooarr[2 * sizeof(int)];
1.1       christos 1566:
                   1567:        if (e == NULL || h == NULL)
                   1568:                rl_initialize();
                   1569:
1.11      lukem    1570:        return (el_getc(e, fooarr));
1.1       christos 1571: }
                   1572:
1.11      lukem    1573:
1.1       christos 1574: /*
                   1575:  * reset the terminal
                   1576:  */
1.5       christos 1577: /* ARGSUSED */
1.1       christos 1578: void
1.30      christos 1579: rl_reset_terminal(const char *p __attribute__((__unused__)))
1.1       christos 1580: {
1.11      lukem    1581:
1.1       christos 1582:        if (h == NULL || e == NULL)
                   1583:                rl_initialize();
                   1584:        el_reset(e);
                   1585: }
                   1586:
1.11      lukem    1587:
1.1       christos 1588: /*
                   1589:  * insert character ``c'' back into input stream, ``count'' times
                   1590:  */
                   1591: int
1.11      lukem    1592: rl_insert(int count, int c)
1.1       christos 1593: {
1.11      lukem    1594:        char arr[2];
1.1       christos 1595:
                   1596:        if (h == NULL || e == NULL)
                   1597:                rl_initialize();
                   1598:
                   1599:        /* XXX - int -> char conversion can lose on multichars */
                   1600:        arr[0] = c;
                   1601:        arr[1] = '\0';
                   1602:
                   1603:        for (; count > 0; count--)
                   1604:                el_push(e, arr);
                   1605:
1.11      lukem    1606:        return (0);
1.35      christos 1607: }
                   1608:
                   1609: /*ARGSUSED*/
                   1610: int
                   1611: rl_newline(int count, int c)
                   1612: {
                   1613:        /*
                   1614:         * Readline-4.0 appears to ignore the args.
                   1615:         */
                   1616:        return rl_insert(1, '\n');
                   1617: }
                   1618:
                   1619: /*ARGSUSED*/
                   1620: static unsigned char
                   1621: rl_bind_wrapper(EditLine *el, unsigned char c)
                   1622: {
                   1623:        if (map[c] == NULL)
                   1624:            return CC_ERROR;
1.49      christos 1625:
                   1626:        _rl_update_pos();
                   1627:
1.35      christos 1628:        (*map[c])(NULL, c);
1.38      christos 1629:
                   1630:        /* If rl_done was set by the above call, deal with it here */
                   1631:        if (rl_done)
                   1632:                return CC_EOF;
                   1633:
1.35      christos 1634:        return CC_NORM;
                   1635: }
                   1636:
                   1637: int
                   1638: rl_add_defun(const char *name, Function *fun, int c)
                   1639: {
                   1640:        char dest[8];
                   1641:        if (c >= sizeof(map) / sizeof(map[0]) || c < 0)
                   1642:                return -1;
                   1643:        map[(unsigned char)c] = fun;
                   1644:        el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1.37      christos 1645:        vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
                   1646:        el_set(e, EL_BIND, dest, name);
1.35      christos 1647:        return 0;
                   1648: }
                   1649:
                   1650: void
                   1651: rl_callback_read_char()
                   1652: {
1.36      christos 1653:        int count = 0, done = 0;
1.35      christos 1654:        const char *buf = el_gets(e, &count);
                   1655:        char *wbuf;
                   1656:
                   1657:        if (buf == NULL || count-- <= 0)
                   1658:                return;
1.61      christos 1659:        if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1.36      christos 1660:                done = 1;
                   1661:        if (buf[count] == '\n' || buf[count] == '\r')
                   1662:                done = 2;
                   1663:
                   1664:        if (done && rl_linefunc != NULL) {
1.35      christos 1665:                el_set(e, EL_UNBUFFERED, 0);
1.36      christos 1666:                if (done == 2) {
                   1667:                    if ((wbuf = strdup(buf)) != NULL)
                   1668:                        wbuf[count] = '\0';
                   1669:                } else
                   1670:                        wbuf = NULL;
1.35      christos 1671:                (*(void (*)(const char *))rl_linefunc)(wbuf);
1.48      christos 1672:                el_set(e, EL_UNBUFFERED, 1);
1.35      christos 1673:        }
                   1674: }
                   1675:
                   1676: void
1.72      christos 1677: rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1.35      christos 1678: {
                   1679:        if (e == NULL) {
                   1680:                rl_initialize();
                   1681:        }
                   1682:        if (rl_prompt)
                   1683:                free(rl_prompt);
                   1684:        rl_prompt = prompt ? strdup(strchr(prompt, *prompt)) : NULL;
                   1685:        rl_linefunc = linefunc;
                   1686:        el_set(e, EL_UNBUFFERED, 1);
                   1687: }
                   1688:
                   1689: void
                   1690: rl_callback_handler_remove(void)
                   1691: {
                   1692:        el_set(e, EL_UNBUFFERED, 0);
1.72      christos 1693:        rl_linefunc = NULL;
1.35      christos 1694: }
                   1695:
                   1696: void
                   1697: rl_redisplay(void)
                   1698: {
                   1699:        char a[2];
1.61      christos 1700:        a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
1.35      christos 1701:        a[1] = '\0';
                   1702:        el_push(e, a);
                   1703: }
                   1704:
                   1705: int
                   1706: rl_get_previous_history(int count, int key)
                   1707: {
                   1708:        char a[2];
                   1709:        a[0] = key;
                   1710:        a[1] = '\0';
                   1711:        while (count--)
                   1712:                el_push(e, a);
                   1713:        return 0;
1.38      christos 1714: }
                   1715:
                   1716: void
                   1717: /*ARGSUSED*/
                   1718: rl_prep_terminal(int meta_flag)
                   1719: {
                   1720:        el_set(e, EL_PREP_TERM, 1);
                   1721: }
                   1722:
                   1723: void
1.68      christos 1724: rl_deprep_terminal(void)
1.38      christos 1725: {
                   1726:        el_set(e, EL_PREP_TERM, 0);
                   1727: }
                   1728:
                   1729: int
                   1730: rl_read_init_file(const char *s)
                   1731: {
                   1732:        return(el_source(e, s));
                   1733: }
                   1734:
                   1735: int
                   1736: rl_parse_and_bind(const char *line)
                   1737: {
                   1738:        const char **argv;
                   1739:        int argc;
                   1740:        Tokenizer *tok;
                   1741:
                   1742:        tok = tok_init(NULL);
1.44      lukem    1743:        tok_str(tok, line, &argc, &argv);
1.38      christos 1744:        argc = el_parse(e, argc, argv);
                   1745:        tok_end(tok);
                   1746:        return (argc ? 1 : 0);
                   1747: }
                   1748:
1.51      christos 1749: int
                   1750: rl_variable_bind(const char *var, const char *value)
                   1751: {
                   1752:        /*
                   1753:         * The proper return value is undocument, but this is what the
                   1754:         * readline source seems to do.
                   1755:         */
                   1756:        return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
                   1757: }
                   1758:
1.38      christos 1759: void
                   1760: rl_stuff_char(int c)
                   1761: {
                   1762:        char buf[2];
                   1763:
                   1764:        buf[0] = c;
                   1765:        buf[1] = '\0';
                   1766:        el_insertstr(e, buf);
                   1767: }
                   1768:
                   1769: static int
                   1770: _rl_event_read_char(EditLine *el, char *cp)
                   1771: {
1.43      christos 1772:        int     n, num_read = 0;
1.38      christos 1773:
                   1774:        *cp = 0;
                   1775:        while (rl_event_hook) {
                   1776:
                   1777:                (*rl_event_hook)();
                   1778:
                   1779: #if defined(FIONREAD)
                   1780:                if (ioctl(el->el_infd, FIONREAD, &n) < 0)
                   1781:                        return(-1);
                   1782:                if (n)
                   1783:                        num_read = read(el->el_infd, cp, 1);
                   1784:                else
                   1785:                        num_read = 0;
                   1786: #elif defined(F_SETFL) && defined(O_NDELAY)
                   1787:                if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
                   1788:                        return(-1);
                   1789:                if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
                   1790:                        return(-1);
                   1791:                num_read = read(el->el_infd, cp, 1);
                   1792:                if (fcntl(el->el_infd, F_SETFL, n))
                   1793:                        return(-1);
                   1794: #else
                   1795:                /* not non-blocking, but what you gonna do? */
                   1796:                num_read = read(el->el_infd, cp, 1);
                   1797:                return(-1);
                   1798: #endif
                   1799:
                   1800:                if (num_read < 0 && errno == EAGAIN)
                   1801:                        continue;
                   1802:                if (num_read == 0)
                   1803:                        continue;
                   1804:                break;
                   1805:        }
                   1806:        if (!rl_event_hook)
                   1807:                el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
                   1808:        return(num_read);
1.1       christos 1809: }
1.49      christos 1810:
                   1811: static void
                   1812: _rl_update_pos(void)
                   1813: {
                   1814:        const LineInfo *li = el_line(e);
                   1815:
                   1816:        rl_point = li->cursor - li->buffer;
                   1817:        rl_end = li->lastchar - li->buffer;
                   1818: }
1.70      christos 1819:
                   1820: void
                   1821: rl_get_screen_size(int *rows, int *cols)
                   1822: {
                   1823:        if (rows)
                   1824:                el_get(e, EL_GETTC, "li", rows);
                   1825:        if (cols)
                   1826:                el_get(e, EL_GETTC, "co", cols);
                   1827: }
                   1828:
                   1829: void
                   1830: rl_set_screen_size(int rows, int cols)
                   1831: {
                   1832:        char buf[64];
                   1833:        (void)snprintf(buf, sizeof(buf), "%d", rows);
                   1834:        el_set(e, EL_SETTC, "li", buf);
                   1835:        (void)snprintf(buf, sizeof(buf), "%d", cols);
                   1836:        el_set(e, EL_SETTC, "co", buf);
                   1837: }
                   1838:
1.71      christos 1839: char **
                   1840: rl_completion_matches(const char *str, rl_compentry_func_t *fun)
                   1841: {
                   1842:        size_t len, max, i, j, min;
                   1843:        char **list, *match, *a, *b;
                   1844:
                   1845:        len = 1;
                   1846:        max = 10;
                   1847:        if ((list = malloc(max * sizeof(*list))) == NULL)
                   1848:                return NULL;
                   1849:
                   1850:        while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
                   1851:                if (len == max) {
                   1852:                        char **nl;
                   1853:                        max += 10;
                   1854:                        if ((nl = realloc(list, max * sizeof(*nl))) == NULL)
                   1855:                                goto out;
                   1856:                        list = nl;
                   1857:                }
                   1858:                list[len++] = match;
                   1859:        }
                   1860:        if (len == 1)
                   1861:                goto out;
                   1862:        list[len] = NULL;
                   1863:        if (len == 2) {
                   1864:                if ((list[0] = strdup(list[1])) == NULL)
                   1865:                        goto out;
                   1866:                return list;
                   1867:        }
                   1868:        qsort(&list[1], len - 1, sizeof(*list),
                   1869:            (int (*)(const void *, const void *)) strcmp);
                   1870:        min = SIZE_T_MAX;
                   1871:        for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
                   1872:                b = list[i + 1];
                   1873:                for (j = 0; a[j] && a[j] == b[j]; j++)
                   1874:                        continue;
                   1875:                if (min > j)
                   1876:                        min = j;
                   1877:        }
                   1878:        if (min == 0 && *str) {
                   1879:                if ((list[0] = strdup(str)) == NULL)
                   1880:                        goto out;
                   1881:        } else {
                   1882:                if ((list[0] = malloc(min + 1)) == NULL)
                   1883:                        goto out;
                   1884:                (void)memcpy(list[0], list[1], min);
                   1885:                list[0][min] = '\0';
                   1886:        }
                   1887:        return list;
                   1888:
                   1889: out:
                   1890:        free(list);
                   1891:        return NULL;
                   1892: }
                   1893:
1.70      christos 1894: char *
                   1895: rl_filename_completion_function (const char *text, int state)
                   1896: {
                   1897:        return fn_filename_completion_function(text, state);
                   1898: }
                   1899:
1.73      christos 1900: void
                   1901: rl_forced_update_display(void)
                   1902: {
1.74      christos 1903:        el_set(e, EL_REFRESH);
1.73      christos 1904: }
                   1905:
1.70      christos 1906: int
                   1907: _rl_abort_internal(void)
                   1908: {
                   1909:        el_beep(e);
                   1910:        longjmp(topbuf, 1);
                   1911:        /*NOTREACHED*/
                   1912: }
                   1913:
                   1914: int
                   1915: _rl_qsort_string_compare(char **s1, char **s2)
                   1916: {
                   1917:        return strcoll(*s1, *s2);
                   1918: }
                   1919:
                   1920: int
                   1921: /*ARGSUSED*/
                   1922: rl_kill_text(int from, int to)
                   1923: {
                   1924:        return 0;
                   1925: }
                   1926:
                   1927: Keymap
                   1928: rl_make_bare_keymap(void)
                   1929: {
                   1930:        return NULL;
                   1931: }
                   1932:
                   1933: Keymap
                   1934: rl_get_keymap(void)
                   1935: {
                   1936:        return NULL;
                   1937: }
                   1938:
                   1939: void
                   1940: /*ARGSUSED*/
                   1941: rl_set_keymap(Keymap k)
                   1942: {
                   1943: }
                   1944:
                   1945: int
                   1946: /*ARGSUSED*/
                   1947: rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
                   1948: {
                   1949:        return 0;
                   1950: }
                   1951:
                   1952: int
                   1953: /*ARGSUSED*/
                   1954: rl_bind_key_in_map(int key, Function *fun, Keymap k)
                   1955: {
                   1956:        return 0;
                   1957: }

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