[BACK]Return to readline.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / lib / libedit

Annotation of src/lib/libedit/readline.c, Revision 1.108

1.108   ! christos    1: /*     $NetBSD: readline.c,v 1.107 2013/01/13 15:46:57 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)
1.108   ! christos   34: __RCSID("$NetBSD: readline.c,v 1.107 2013/01/13 15:46:57 christos Exp $");
1.1       christos   35: #endif /* not lint && not SCCSID */
                     36:
                     37: #include <sys/types.h>
                     38: #include <sys/stat.h>
                     39: #include <stdio.h>
                     40: #include <dirent.h>
                     41: #include <string.h>
                     42: #include <pwd.h>
                     43: #include <ctype.h>
                     44: #include <stdlib.h>
                     45: #include <unistd.h>
                     46: #include <limits.h>
1.38      christos   47: #include <errno.h>
                     48: #include <fcntl.h>
1.70      christos   49: #include <setjmp.h>
1.35      christos   50: #include <vis.h>
1.97      christos   51:
1.79      sketch     52: #include "readline/readline.h"
1.45      christos   53: #include "el.h"
                     54: #include "fcns.h"              /* for EL_NUM_FCNS */
1.1       christos   55: #include "histedit.h"
1.53      dsl        56: #include "filecomplete.h"
1.1       christos   57:
1.68      christos   58: void rl_prep_terminal(int);
                     59: void rl_deprep_terminal(void);
                     60:
1.1       christos   61: /* for rl_complete() */
1.40      christos   62: #define TAB            '\r'
1.1       christos   63:
                     64: /* see comment at the #ifdef for sense of this */
1.40      christos   65: /* #define GDB_411_HACK */
1.1       christos   66:
                     67: /* readline compatibility stuff - look at readline sources/documentation */
                     68: /* to see what these variables mean */
1.11      lukem      69: const char *rl_library_version = "EditLine wrapper";
1.85      christos   70: int rl_readline_version = RL_READLINE_VERSION;
1.20      christos   71: static char empty[] = { '\0' };
                     72: static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
                     73: static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
                     74:     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
                     75: char *rl_readline_name = empty;
1.11      lukem      76: FILE *rl_instream = NULL;
                     77: FILE *rl_outstream = NULL;
                     78: int rl_point = 0;
                     79: int rl_end = 0;
                     80: char *rl_line_buffer = NULL;
1.55      agc        81: VCPFunction *rl_linefunc = NULL;
1.38      christos   82: int rl_done = 0;
                     83: VFunction *rl_event_hook = NULL;
1.70      christos   84: KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
                     85:     emacs_meta_keymap,
                     86:     emacs_ctlx_keymap;
1.108   ! christos   87: /*
        !            88:  * The following is not implemented; we always catch signals in the
        !            89:  * libedit fashion: set handlers on entry to el_gets() and clear them
        !            90:  * on the way out. This simplistic approach works for most cases; if
        !            91:  * it does not work for your application, please let us know.
        !            92:  */
        !            93: int rl_catch_signals = 1;
        !            94: int rl_catch_sigwinch = 1;
1.11      lukem      95:
                     96: int history_base = 1;          /* probably never subject to change */
                     97: int history_length = 0;
                     98: int max_input_history = 0;
                     99: char history_expansion_char = '!';
                    100: char history_subst_char = '^';
1.20      christos  101: char *history_no_expand_chars = expand_chars;
1.11      lukem     102: Function *history_inhibit_expansion_function = NULL;
1.40      christos  103: char *history_arg_extract(int start, int end, const char *str);
1.11      lukem     104:
                    105: int rl_inhibit_completion = 0;
                    106: int rl_attempted_completion_over = 0;
1.20      christos  107: char *rl_basic_word_break_characters = break_chars;
1.11      lukem     108: char *rl_completer_word_break_characters = NULL;
                    109: char *rl_completer_quote_characters = NULL;
1.34      christos  110: Function *rl_completion_entry_function = NULL;
1.103     christos  111: char *(*rl_completion_word_break_hook)(void) = NULL;
1.11      lukem     112: CPPFunction *rl_attempted_completion_function = NULL;
1.32      christos  113: Function *rl_pre_input_hook = NULL;
                    114: Function *rl_startup1_hook = NULL;
1.72      christos  115: int (*rl_getc_function)(FILE *) = NULL;
1.32      christos  116: char *rl_terminal_name = NULL;
                    117: int rl_already_prompted = 0;
                    118: int rl_filename_completion_desired = 0;
                    119: int rl_ignore_completion_duplicates = 0;
1.70      christos  120: int readline_echoing_p = 1;
                    121: int _rl_print_completions_horizontally = 0;
1.32      christos  122: VFunction *rl_redisplay_function = NULL;
1.33      christos  123: Function *rl_startup_hook = NULL;
1.34      christos  124: VFunction *rl_completion_display_matches_hook = NULL;
1.68      christos  125: VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
                    126: VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
1.85      christos  127: KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
1.1       christos  128:
1.12      jdolecek  129: /*
1.32      christos  130:  * The current prompt string.
                    131:  */
                    132: char *rl_prompt = NULL;
                    133: /*
1.12      jdolecek  134:  * This is set to character indicating type of completion being done by
                    135:  * rl_complete_internal(); this is available for application completion
                    136:  * functions.
                    137:  */
                    138: int rl_completion_type = 0;
                    139:
                    140: /*
                    141:  * If more than this number of items results from query for possible
                    142:  * completions, we ask user if they are sure to really display the list.
                    143:  */
                    144: int rl_completion_query_items = 100;
                    145:
                    146: /*
1.15      jdolecek  147:  * List of characters which are word break characters, but should be left
                    148:  * in the parsed text when it is passed to the completion function.
                    149:  * Shell uses this to help determine what kind of completing to do.
1.12      jdolecek  150:  */
1.53      dsl       151: char *rl_special_prefixes = NULL;
1.15      jdolecek  152:
                    153: /*
                    154:  * This is the character appended to the completed words if at the end of
                    155:  * the line. Default is ' ' (a space).
                    156:  */
                    157: int rl_completion_append_character = ' ';
                    158:
                    159: /* stuff below is used internally by libedit for readline emulation */
                    160:
1.92      christos  161: static History *h = NULL;
1.1       christos  162: static EditLine *e = NULL;
1.35      christos  163: static Function *map[256];
1.70      christos  164: static jmp_buf topbuf;
1.1       christos  165:
                    166: /* internal functions */
1.11      lukem     167: static unsigned char    _el_rl_complete(EditLine *, int);
1.46      christos  168: static unsigned char    _el_rl_tstp(EditLine *, int);
1.11      lukem     169: static char            *_get_prompt(EditLine *);
1.59      christos  170: static int              _getc_function(EditLine *, char *);
1.11      lukem     171: static HIST_ENTRY      *_move_history(int);
1.40      christos  172: static int              _history_expand_command(const char *, size_t, size_t,
                    173:     char **);
1.11      lukem     174: static char            *_rl_compat_sub(const char *, const char *,
1.40      christos  175:     const char *, int);
1.38      christos  176: static int              _rl_event_read_char(EditLine *, char *);
1.49      christos  177: static void             _rl_update_pos(void);
1.1       christos  178:
1.5       christos  179:
                    180: /* ARGSUSED */
1.1       christos  181: static char *
1.30      christos  182: _get_prompt(EditLine *el __attribute__((__unused__)))
1.1       christos  183: {
1.32      christos  184:        rl_already_prompted = 1;
1.96      christos  185:        return rl_prompt;
1.1       christos  186: }
                    187:
1.11      lukem     188:
1.1       christos  189: /*
                    190:  * generic function for moving around history
                    191:  */
1.2       christos  192: static HIST_ENTRY *
1.11      lukem     193: _move_history(int op)
1.1       christos  194: {
1.92      christos  195:        HistEvent ev;
1.1       christos  196:        static HIST_ENTRY rl_he;
                    197:
1.92      christos  198:        if (history(h, &ev, op) != 0)
1.96      christos  199:                return NULL;
1.1       christos  200:
1.92      christos  201:        rl_he.line = ev.str;
1.40      christos  202:        rl_he.data = NULL;
1.1       christos  203:
1.96      christos  204:        return &rl_he;
1.1       christos  205: }
                    206:
                    207:
1.7       simonb    208: /*
1.59      christos  209:  * read one key from user defined input function
                    210:  */
                    211: static int
1.61      christos  212: /*ARGSUSED*/
1.97      christos  213: _getc_function(EditLine *el __attribute__((__unused__)), char *c)
1.59      christos  214: {
                    215:        int i;
                    216:
1.72      christos  217:        i = (*rl_getc_function)(NULL);
1.59      christos  218:        if (i == -1)
                    219:                return 0;
1.99      christos  220:        *c = (char)i;
1.59      christos  221:        return 1;
                    222: }
                    223:
1.91      christos  224: static void
                    225: _resize_fun(EditLine *el, void *a)
                    226: {
                    227:        const LineInfo *li;
                    228:        char **ap = a;
                    229:
                    230:        li = el_line(el);
                    231:        /* a cheesy way to get rid of const cast. */
1.98      christos  232:        *ap = memchr(li->buffer, *li->buffer, (size_t)1);
1.91      christos  233: }
                    234:
1.85      christos  235: static const char *
                    236: _default_history_file(void)
                    237: {
                    238:        struct passwd *p;
                    239:        static char path[PATH_MAX];
                    240:
                    241:        if (*path)
                    242:                return path;
                    243:        if ((p = getpwuid(getuid())) == NULL)
                    244:                return NULL;
1.98      christos  245:        (void)snprintf(path, sizeof(path), "%s/.history", p->pw_dir);
1.85      christos  246:        return path;
                    247: }
1.59      christos  248:
                    249: /*
1.7       simonb    250:  * READLINE compatibility stuff
1.1       christos  251:  */
                    252:
                    253: /*
1.78      christos  254:  * Set the prompt
                    255:  */
                    256: int
                    257: rl_set_prompt(const char *prompt)
                    258: {
1.82      christos  259:        char *p;
                    260:
1.78      christos  261:        if (!prompt)
                    262:                prompt = "";
                    263:        if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
                    264:                return 0;
                    265:        if (rl_prompt)
1.95      christos  266:                el_free(rl_prompt);
1.78      christos  267:        rl_prompt = strdup(prompt);
1.82      christos  268:        if (rl_prompt == NULL)
                    269:                return -1;
                    270:
                    271:        while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
                    272:                *p = RL_PROMPT_START_IGNORE;
                    273:
                    274:        return 0;
1.78      christos  275: }
                    276:
                    277: /*
1.1       christos  278:  * initialize rl compat stuff
                    279:  */
                    280: int
1.11      lukem     281: rl_initialize(void)
1.1       christos  282: {
1.92      christos  283:        HistEvent ev;
1.18      christos  284:        int editmode = 1;
                    285:        struct termios t;
1.1       christos  286:
                    287:        if (e != NULL)
                    288:                el_end(e);
                    289:        if (h != NULL)
1.92      christos  290:                history_end(h);
1.1       christos  291:
                    292:        if (!rl_instream)
                    293:                rl_instream = stdin;
                    294:        if (!rl_outstream)
                    295:                rl_outstream = stdout;
1.18      christos  296:
                    297:        /*
                    298:         * See if we don't really want to run the editor
                    299:         */
                    300:        if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
                    301:                editmode = 0;
                    302:
1.4       christos  303:        e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
1.18      christos  304:
                    305:        if (!editmode)
1.92      christos  306:                el_set(e, EL_EDITMODE, 0);
1.1       christos  307:
1.92      christos  308:        h = history_init();
1.1       christos  309:        if (!e || !h)
1.96      christos  310:                return -1;
1.1       christos  311:
1.92      christos  312:        history(h, &ev, H_SETSIZE, INT_MAX);    /* unlimited */
1.1       christos  313:        history_length = 0;
                    314:        max_input_history = INT_MAX;
                    315:        el_set(e, EL_HIST, history, h);
                    316:
1.91      christos  317:        /* Setup resize function */
                    318:        el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer);
                    319:
1.59      christos  320:        /* setup getc function if valid */
                    321:        if (rl_getc_function)
                    322:                el_set(e, EL_GETCFN, _getc_function);
                    323:
1.1       christos  324:        /* for proper prompt printing in readline() */
1.78      christos  325:        if (rl_set_prompt("") == -1) {
1.92      christos  326:                history_end(h);
1.23      christos  327:                el_end(e);
                    328:                return -1;
                    329:        }
1.82      christos  330:        el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
1.39      christos  331:        el_set(e, EL_SIGNAL, rl_catch_signals);
1.1       christos  332:
                    333:        /* set default mode to "emacs"-style and read setting afterwards */
                    334:        /* so this can be overriden */
                    335:        el_set(e, EL_EDITOR, "emacs");
1.32      christos  336:        if (rl_terminal_name != NULL)
                    337:                el_set(e, EL_TERMINAL, rl_terminal_name);
                    338:        else
                    339:                el_get(e, EL_TERMINAL, &rl_terminal_name);
1.1       christos  340:
1.12      jdolecek  341:        /*
1.35      christos  342:         * Word completion - this has to go AFTER rebinding keys
1.12      jdolecek  343:         * to emacs-style.
                    344:         */
1.1       christos  345:        el_set(e, EL_ADDFN, "rl_complete",
1.35      christos  346:            "ReadLine compatible completion function",
1.11      lukem     347:            _el_rl_complete);
1.1       christos  348:        el_set(e, EL_BIND, "^I", "rl_complete", NULL);
1.46      christos  349:
                    350:        /*
                    351:         * Send TSTP when ^Z is pressed.
                    352:         */
                    353:        el_set(e, EL_ADDFN, "rl_tstp",
                    354:            "ReadLine compatible suspend function",
                    355:            _el_rl_tstp);
                    356:        el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
1.12      jdolecek  357:
1.1       christos  358:        /* read settings from configuration file */
                    359:        el_source(e, NULL);
                    360:
1.12      jdolecek  361:        /*
                    362:         * Unfortunately, some applications really do use rl_point
                    363:         * and rl_line_buffer directly.
                    364:         */
1.91      christos  365:        _resize_fun(e, &rl_line_buffer);
1.49      christos  366:        _rl_update_pos();
1.1       christos  367:
1.32      christos  368:        if (rl_startup_hook)
                    369:                (*rl_startup_hook)(NULL, 0);
                    370:
1.96      christos  371:        return 0;
1.1       christos  372: }
                    373:
1.11      lukem     374:
1.1       christos  375: /*
                    376:  * read one line from input stream and return it, chomping
                    377:  * trailing newline (if there is any)
                    378:  */
                    379: char *
1.70      christos  380: readline(const char *p)
1.1       christos  381: {
1.92      christos  382:        HistEvent ev;
1.70      christos  383:        const char * volatile prompt = p;
1.3       thorpej   384:        int count;
1.1       christos  385:        const char *ret;
1.20      christos  386:        char *buf;
1.38      christos  387:        static int used_event_hook;
1.1       christos  388:
                    389:        if (e == NULL || h == NULL)
                    390:                rl_initialize();
                    391:
1.38      christos  392:        rl_done = 0;
                    393:
1.70      christos  394:        (void)setjmp(topbuf);
                    395:
1.9       jdolecek  396:        /* update prompt accordingly to what has been passed */
1.78      christos  397:        if (rl_set_prompt(prompt) == -1)
                    398:                return NULL;
1.32      christos  399:
                    400:        if (rl_pre_input_hook)
                    401:                (*rl_pre_input_hook)(NULL, 0);
                    402:
1.38      christos  403:        if (rl_event_hook && !(e->el_flags&NO_TTY)) {
                    404:                el_set(e, EL_GETCFN, _rl_event_read_char);
                    405:                used_event_hook = 1;
                    406:        }
                    407:
                    408:        if (!rl_event_hook && used_event_hook) {
                    409:                el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
                    410:                used_event_hook = 0;
                    411:        }
                    412:
1.32      christos  413:        rl_already_prompted = 0;
                    414:
1.1       christos  415:        /* get one line from input stream */
                    416:        ret = el_gets(e, &count);
                    417:
                    418:        if (ret && count > 0) {
1.5       christos  419:                int lastidx;
1.1       christos  420:
1.20      christos  421:                buf = strdup(ret);
1.23      christos  422:                if (buf == NULL)
                    423:                        return NULL;
1.1       christos  424:                lastidx = count - 1;
1.20      christos  425:                if (buf[lastidx] == '\n')
                    426:                        buf[lastidx] = '\0';
1.1       christos  427:        } else
1.20      christos  428:                buf = NULL;
1.1       christos  429:
1.92      christos  430:        history(h, &ev, H_GETSIZE);
1.1       christos  431:        history_length = ev.num;
                    432:
1.20      christos  433:        return buf;
1.1       christos  434: }
                    435:
                    436: /*
                    437:  * history functions
                    438:  */
                    439:
                    440: /*
                    441:  * is normally called before application starts to use
                    442:  * history expansion functions
                    443:  */
                    444: void
1.11      lukem     445: using_history(void)
1.1       christos  446: {
                    447:        if (h == NULL || e == NULL)
                    448:                rl_initialize();
                    449: }
                    450:
1.11      lukem     451:
1.1       christos  452: /*
                    453:  * substitute ``what'' with ``with'', returning resulting string; if
1.29      wiz       454:  * globally == 1, substitutes all occurrences of what, otherwise only the
1.1       christos  455:  * first one
                    456:  */
1.11      lukem     457: static char *
                    458: _rl_compat_sub(const char *str, const char *what, const char *with,
                    459:     int globally)
                    460: {
1.40      christos  461:        const   char    *s;
                    462:        char    *r, *result;
                    463:        size_t  len, with_len, what_len;
1.1       christos  464:
1.40      christos  465:        len = strlen(str);
                    466:        with_len = strlen(with);
                    467:        what_len = strlen(what);
                    468:
                    469:        /* calculate length we need for result */
                    470:        s = str;
                    471:        while (*s) {
                    472:                if (*s == *what && !strncmp(s, what, what_len)) {
                    473:                        len += with_len - what_len;
                    474:                        if (!globally)
                    475:                                break;
                    476:                        s += what_len;
                    477:                } else
                    478:                        s++;
                    479:        }
1.95      christos  480:        r = result = el_malloc((len + 1) * sizeof(*r));
1.23      christos  481:        if (result == NULL)
                    482:                return NULL;
1.40      christos  483:        s = str;
                    484:        while (*s) {
                    485:                if (*s == *what && !strncmp(s, what, what_len)) {
                    486:                        (void)strncpy(r, with, with_len);
                    487:                        r += with_len;
                    488:                        s += what_len;
                    489:                        if (!globally) {
                    490:                                (void)strcpy(r, s);
1.96      christos  491:                                return result;
1.1       christos  492:                        }
1.40      christos  493:                } else
                    494:                        *r++ = *s++;
                    495:        }
1.76      christos  496:        *r = '\0';
1.96      christos  497:        return result;
1.40      christos  498: }
                    499:
                    500: static char    *last_search_pat;       /* last !?pat[?] search pattern */
                    501: static char    *last_search_match;     /* last !?pat[?] that matched */
                    502:
                    503: const char *
                    504: get_history_event(const char *cmd, int *cindex, int qchar)
                    505: {
                    506:        int idx, sign, sub, num, begin, ret;
                    507:        size_t len;
                    508:        char    *pat;
                    509:        const char *rptr;
1.92      christos  510:        HistEvent ev;
1.40      christos  511:
                    512:        idx = *cindex;
                    513:        if (cmd[idx++] != history_expansion_char)
1.96      christos  514:                return NULL;
1.40      christos  515:
                    516:        /* find out which event to take */
1.76      christos  517:        if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
1.92      christos  518:                if (history(h, &ev, H_FIRST) != 0)
1.96      christos  519:                        return NULL;
1.40      christos  520:                *cindex = cmd[idx]? (idx + 1):idx;
1.92      christos  521:                return ev.str;
1.40      christos  522:        }
                    523:        sign = 0;
                    524:        if (cmd[idx] == '-') {
                    525:                sign = 1;
                    526:                idx++;
                    527:        }
                    528:
                    529:        if ('0' <= cmd[idx] && cmd[idx] <= '9') {
                    530:                HIST_ENTRY *rl_he;
                    531:
                    532:                num = 0;
                    533:                while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
                    534:                        num = num * 10 + cmd[idx] - '0';
                    535:                        idx++;
                    536:                }
                    537:                if (sign)
                    538:                        num = history_length - num + 1;
                    539:
                    540:                if (!(rl_he = history_get(num)))
1.96      christos  541:                        return NULL;
1.40      christos  542:
                    543:                *cindex = idx;
1.96      christos  544:                return rl_he->line;
1.40      christos  545:        }
                    546:        sub = 0;
                    547:        if (cmd[idx] == '?') {
                    548:                sub = 1;
                    549:                idx++;
                    550:        }
                    551:        begin = idx;
                    552:        while (cmd[idx]) {
                    553:                if (cmd[idx] == '\n')
                    554:                        break;
                    555:                if (sub && cmd[idx] == '?')
                    556:                        break;
                    557:                if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
                    558:                                    || cmd[idx] == '\t' || cmd[idx] == qchar))
                    559:                        break;
                    560:                idx++;
                    561:        }
1.99      christos  562:        len = (size_t)idx - (size_t)begin;
1.40      christos  563:        if (sub && cmd[idx] == '?')
                    564:                idx++;
                    565:        if (sub && len == 0 && last_search_pat && *last_search_pat)
                    566:                pat = last_search_pat;
                    567:        else if (len == 0)
1.96      christos  568:                return NULL;
1.40      christos  569:        else {
1.95      christos  570:                if ((pat = el_malloc((len + 1) * sizeof(*pat))) == NULL)
1.40      christos  571:                        return NULL;
                    572:                (void)strncpy(pat, cmd + begin, len);
                    573:                pat[len] = '\0';
                    574:        }
                    575:
1.92      christos  576:        if (history(h, &ev, H_CURR) != 0) {
1.40      christos  577:                if (pat != last_search_pat)
1.95      christos  578:                        el_free(pat);
1.96      christos  579:                return NULL;
1.40      christos  580:        }
                    581:        num = ev.num;
                    582:
                    583:        if (sub) {
                    584:                if (pat != last_search_pat) {
                    585:                        if (last_search_pat)
1.95      christos  586:                                el_free(last_search_pat);
1.40      christos  587:                        last_search_pat = pat;
1.1       christos  588:                }
1.40      christos  589:                ret = history_search(pat, -1);
                    590:        } else
                    591:                ret = history_search_prefix(pat, -1);
                    592:
                    593:        if (ret == -1) {
                    594:                /* restore to end of list on failed search */
1.92      christos  595:                history(h, &ev, H_FIRST);
1.40      christos  596:                (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
                    597:                if (pat != last_search_pat)
1.95      christos  598:                        el_free(pat);
1.96      christos  599:                return NULL;
1.40      christos  600:        }
                    601:
                    602:        if (sub && len) {
                    603:                if (last_search_match && last_search_match != pat)
1.95      christos  604:                        el_free(last_search_match);
1.40      christos  605:                last_search_match = pat;
                    606:        }
                    607:
                    608:        if (pat != last_search_pat)
1.95      christos  609:                el_free(pat);
1.40      christos  610:
1.92      christos  611:        if (history(h, &ev, H_CURR) != 0)
1.96      christos  612:                return NULL;
1.40      christos  613:        *cindex = idx;
1.92      christos  614:        rptr = ev.str;
1.40      christos  615:
                    616:        /* roll back to original position */
1.92      christos  617:        (void)history(h, &ev, H_SET, num);
1.1       christos  618:
1.40      christos  619:        return rptr;
1.1       christos  620: }
                    621:
                    622: /*
                    623:  * the real function doing history expansion - takes as argument command
                    624:  * to do and data upon which the command should be executed
                    625:  * does expansion the way I've understood readline documentation
                    626:  *
                    627:  * returns 0 if data was not modified, 1 if it was and 2 if the string
                    628:  * should be only printed and not executed; in case of error,
                    629:  * returns -1 and *result points to NULL
                    630:  * it's callers responsibility to free() string returned in *result
                    631:  */
                    632: static int
1.40      christos  633: _history_expand_command(const char *command, size_t offs, size_t cmdlen,
                    634:     char **result)
1.11      lukem     635: {
1.40      christos  636:        char *tmp, *search = NULL, *aptr;
                    637:        const char *ptr, *cmd;
1.11      lukem     638:        static char *from = NULL, *to = NULL;
1.40      christos  639:        int start, end, idx, has_mods = 0;
                    640:        int p_on = 0, g_on = 0;
1.1       christos  641:
                    642:        *result = NULL;
1.40      christos  643:        aptr = NULL;
1.41      christos  644:        ptr = NULL;
1.1       christos  645:
1.40      christos  646:        /* First get event specifier */
                    647:        idx = 0;
1.1       christos  648:
1.40      christos  649:        if (strchr(":^*$", command[offs + 1])) {
                    650:                char str[4];
                    651:                /*
                    652:                * "!:" is shorthand for "!!:".
                    653:                * "!^", "!*" and "!$" are shorthand for
                    654:                * "!!:^", "!!:*" and "!!:$" respectively.
                    655:                */
                    656:                str[0] = str[1] = '!';
                    657:                str[2] = '0';
                    658:                ptr = get_history_event(str, &idx, 0);
                    659:                idx = (command[offs + 1] == ':')? 1:0;
                    660:                has_mods = 1;
1.1       christos  661:        } else {
1.40      christos  662:                if (command[offs + 1] == '#') {
                    663:                        /* use command so far */
1.95      christos  664:                        if ((aptr = el_malloc((offs + 1) * sizeof(*aptr)))
                    665:                            == NULL)
1.40      christos  666:                                return -1;
                    667:                        (void)strncpy(aptr, command, offs);
                    668:                        aptr[offs] = '\0';
                    669:                        idx = 1;
1.1       christos  670:                } else {
1.40      christos  671:                        int     qchar;
                    672:
                    673:                        qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
                    674:                        ptr = get_history_event(command + offs, &idx, qchar);
                    675:                }
1.99      christos  676:                has_mods = command[offs + (size_t)idx] == ':';
1.40      christos  677:        }
1.1       christos  678:
1.40      christos  679:        if (ptr == NULL && aptr == NULL)
1.96      christos  680:                return -1;
1.1       christos  681:
1.40      christos  682:        if (!has_mods) {
1.85      christos  683:                *result = strdup(aptr ? aptr : ptr);
1.40      christos  684:                if (aptr)
1.95      christos  685:                        el_free(aptr);
1.85      christos  686:                if (*result == NULL)
                    687:                        return -1;
1.96      christos  688:                return 1;
1.40      christos  689:        }
                    690:
                    691:        cmd = command + offs + idx + 1;
                    692:
                    693:        /* Now parse any word designators */
                    694:
                    695:        if (*cmd == '%')        /* last word matched by ?pat? */
                    696:                tmp = strdup(last_search_match? last_search_match:"");
                    697:        else if (strchr("^*$-0123456789", *cmd)) {
                    698:                start = end = -1;
                    699:                if (*cmd == '^')
                    700:                        start = end = 1, cmd++;
                    701:                else if (*cmd == '$')
                    702:                        start = -1, cmd++;
                    703:                else if (*cmd == '*')
                    704:                        start = 1, cmd++;
                    705:               else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
                    706:                        start = 0;
                    707:                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    708:                                start = start * 10 + *cmd++ - '0';
                    709:
                    710:                        if (*cmd == '-') {
                    711:                                if (isdigit((unsigned char) cmd[1])) {
                    712:                                        cmd++;
                    713:                                        end = 0;
                    714:                                        while (*cmd && '0' <= *cmd && *cmd <= '9')
                    715:                                                end = end * 10 + *cmd++ - '0';
                    716:                                } else if (cmd[1] == '$') {
                    717:                                        cmd += 2;
                    718:                                        end = -1;
                    719:                                } else {
                    720:                                        cmd++;
                    721:                                        end = -2;
                    722:                                }
                    723:                        } else if (*cmd == '*')
                    724:                                end = -1, cmd++;
1.1       christos  725:                        else
1.40      christos  726:                                end = start;
                    727:                }
                    728:                tmp = history_arg_extract(start, end, aptr? aptr:ptr);
                    729:                if (tmp == NULL) {
                    730:                        (void)fprintf(rl_outstream, "%s: Bad word specifier",
                    731:                            command + offs + idx);
                    732:                        if (aptr)
1.95      christos  733:                                el_free(aptr);
1.96      christos  734:                        return -1;
1.40      christos  735:                }
                    736:        } else
                    737:                tmp = strdup(aptr? aptr:ptr);
1.1       christos  738:
1.40      christos  739:        if (aptr)
1.95      christos  740:                el_free(aptr);
1.1       christos  741:
1.77      lukem     742:        if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
1.40      christos  743:                *result = tmp;
1.96      christos  744:                return 1;
1.1       christos  745:        }
                    746:
                    747:        for (; *cmd; cmd++) {
                    748:                if (*cmd == ':')
                    749:                        continue;
1.40      christos  750:                else if (*cmd == 'h') {         /* remove trailing path */
                    751:                        if ((aptr = strrchr(tmp, '/')) != NULL)
1.76      christos  752:                                *aptr = '\0';
1.40      christos  753:                } else if (*cmd == 't') {       /* remove leading path */
                    754:                        if ((aptr = strrchr(tmp, '/')) != NULL) {
                    755:                                aptr = strdup(aptr + 1);
1.95      christos  756:                                el_free(tmp);
1.40      christos  757:                                tmp = aptr;
                    758:                        }
                    759:                } else if (*cmd == 'r') {       /* remove trailing suffix */
                    760:                        if ((aptr = strrchr(tmp, '.')) != NULL)
1.76      christos  761:                                *aptr = '\0';
1.40      christos  762:                } else if (*cmd == 'e') {       /* remove all but suffix */
                    763:                        if ((aptr = strrchr(tmp, '.')) != NULL) {
                    764:                                aptr = strdup(aptr);
1.95      christos  765:                                el_free(tmp);
1.40      christos  766:                                tmp = aptr;
                    767:                        }
                    768:                } else if (*cmd == 'p')         /* print only */
                    769:                        p_on = 1;
1.1       christos  770:                else if (*cmd == 'g')
                    771:                        g_on = 2;
                    772:                else if (*cmd == 's' || *cmd == '&') {
1.11      lukem     773:                        char *what, *with, delim;
1.30      christos  774:                        size_t len, from_len;
1.5       christos  775:                        size_t size;
1.1       christos  776:
                    777:                        if (*cmd == '&' && (from == NULL || to == NULL))
                    778:                                continue;
                    779:                        else if (*cmd == 's') {
                    780:                                delim = *(++cmd), cmd++;
                    781:                                size = 16;
1.95      christos  782:                                what = el_realloc(from, size * sizeof(*what));
1.23      christos  783:                                if (what == NULL) {
1.95      christos  784:                                        el_free(from);
                    785:                                        el_free(tmp);
1.28      christos  786:                                        return 0;
1.23      christos  787:                                }
1.1       christos  788:                                len = 0;
                    789:                                for (; *cmd && *cmd != delim; cmd++) {
1.40      christos  790:                                        if (*cmd == '\\' && cmd[1] == delim)
1.1       christos  791:                                                cmd++;
1.23      christos  792:                                        if (len >= size) {
                    793:                                                char *nwhat;
1.95      christos  794:                                                nwhat = el_realloc(what,
                    795:                                                    (size <<= 1) *
                    796:                                                    sizeof(*nwhat));
1.23      christos  797:                                                if (nwhat == NULL) {
1.95      christos  798:                                                        el_free(what);
                    799:                                                        el_free(tmp);
1.28      christos  800:                                                        return 0;
1.23      christos  801:                                                }
                    802:                                                what = nwhat;
                    803:                                        }
1.1       christos  804:                                        what[len++] = *cmd;
                    805:                                }
                    806:                                what[len] = '\0';
                    807:                                from = what;
                    808:                                if (*what == '\0') {
1.95      christos  809:                                        el_free(what);
1.23      christos  810:                                        if (search) {
1.1       christos  811:                                                from = strdup(search);
1.62      christos  812:                                                if (from == NULL) {
1.95      christos  813:                                                        el_free(tmp);
1.28      christos  814:                                                        return 0;
1.62      christos  815:                                                }
1.23      christos  816:                                        } else {
1.1       christos  817:                                                from = NULL;
1.95      christos  818:                                                el_free(tmp);
1.96      christos  819:                                                return -1;
1.1       christos  820:                                        }
                    821:                                }
                    822:                                cmd++;  /* shift after delim */
                    823:                                if (!*cmd)
                    824:                                        continue;
                    825:
                    826:                                size = 16;
1.95      christos  827:                                with = el_realloc(to, size * sizeof(*with));
1.23      christos  828:                                if (with == NULL) {
1.95      christos  829:                                        el_free(to);
                    830:                                        el_free(tmp);
1.23      christos  831:                                        return -1;
                    832:                                }
1.1       christos  833:                                len = 0;
                    834:                                from_len = strlen(from);
                    835:                                for (; *cmd && *cmd != delim; cmd++) {
                    836:                                        if (len + from_len + 1 >= size) {
1.23      christos  837:                                                char *nwith;
1.1       christos  838:                                                size += from_len + 1;
1.95      christos  839:                                                nwith = el_realloc(with,
                    840:                                                    size * sizeof(*nwith));
1.23      christos  841:                                                if (nwith == NULL) {
1.95      christos  842:                                                        el_free(with);
                    843:                                                        el_free(tmp);
1.23      christos  844:                                                        return -1;
                    845:                                                }
                    846:                                                with = nwith;
1.1       christos  847:                                        }
                    848:                                        if (*cmd == '&') {
                    849:                                                /* safe */
1.40      christos  850:                                                (void)strcpy(&with[len], from);
1.1       christos  851:                                                len += from_len;
                    852:                                                continue;
                    853:                                        }
                    854:                                        if (*cmd == '\\'
                    855:                                            && (*(cmd + 1) == delim
                    856:                                                || *(cmd + 1) == '&'))
                    857:                                                cmd++;
                    858:                                        with[len++] = *cmd;
                    859:                                }
                    860:                                with[len] = '\0';
                    861:                                to = with;
                    862:                        }
                    863:
1.40      christos  864:                        aptr = _rl_compat_sub(tmp, from, to, g_on);
                    865:                        if (aptr) {
1.95      christos  866:                                el_free(tmp);
1.40      christos  867:                                tmp = aptr;
1.23      christos  868:                        }
1.40      christos  869:                        g_on = 0;
1.1       christos  870:                }
1.5       christos  871:        }
1.40      christos  872:        *result = tmp;
1.96      christos  873:        return p_on? 2:1;
1.1       christos  874: }
                    875:
1.11      lukem     876:
1.1       christos  877: /*
                    878:  * csh-style history expansion
                    879:  */
                    880: int
1.11      lukem     881: history_expand(char *str, char **output)
                    882: {
1.40      christos  883:        int ret = 0;
                    884:        size_t idx, i, size;
                    885:        char *tmp, *result;
1.1       christos  886:
                    887:        if (h == NULL || e == NULL)
                    888:                rl_initialize();
                    889:
1.40      christos  890:        if (history_expansion_char == 0) {
                    891:                *output = strdup(str);
1.96      christos  892:                return 0;
1.40      christos  893:        }
1.1       christos  894:
1.40      christos  895:        *output = NULL;
1.1       christos  896:        if (str[0] == history_subst_char) {
                    897:                /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
1.100     christos  898:                *output = el_malloc((strlen(str) + 4 + 1) * sizeof(**output));
1.40      christos  899:                if (*output == NULL)
                    900:                        return 0;
                    901:                (*output)[0] = (*output)[1] = history_expansion_char;
                    902:                (*output)[2] = ':';
                    903:                (*output)[3] = 's';
                    904:                (void)strcpy((*output) + 4, str);
                    905:                str = *output;
                    906:        } else {
                    907:                *output = strdup(str);
                    908:                if (*output == NULL)
                    909:                        return 0;
1.1       christos  910:        }
1.40      christos  911:
1.63      christos  912: #define ADD_STRING(what, len, fr)                                      \
1.1       christos  913:        {                                                               \
1.23      christos  914:                if (idx + len + 1 > size) {                             \
1.95      christos  915:                        char *nresult = el_realloc(result,              \
                    916:                            (size += len + 1) * sizeof(*nresult));      \
1.23      christos  917:                        if (nresult == NULL) {                          \
1.95      christos  918:                                el_free(*output);                       \
1.65      christos  919:                                if (/*CONSTCOND*/fr)                    \
1.95      christos  920:                                        el_free(tmp);                   \
1.28      christos  921:                                return 0;                               \
1.23      christos  922:                        }                                               \
                    923:                        result = nresult;                               \
                    924:                }                                                       \
1.1       christos  925:                (void)strncpy(&result[idx], what, len);                 \
                    926:                idx += len;                                             \
                    927:                result[idx] = '\0';                                     \
                    928:        }
                    929:
                    930:        result = NULL;
                    931:        size = idx = 0;
1.64      christos  932:        tmp = NULL;
1.1       christos  933:        for (i = 0; str[i];) {
1.40      christos  934:                int qchar, loop_again;
                    935:                size_t len, start, j;
1.1       christos  936:
1.40      christos  937:                qchar = 0;
1.1       christos  938:                loop_again = 1;
                    939:                start = j = i;
                    940: loop:
                    941:                for (; str[j]; j++) {
                    942:                        if (str[j] == '\\' &&
                    943:                            str[j + 1] == history_expansion_char) {
1.40      christos  944:                                (void)strcpy(&str[j], &str[j + 1]);
1.1       christos  945:                                continue;
                    946:                        }
                    947:                        if (!loop_again) {
1.40      christos  948:                                if (isspace((unsigned char) str[j])
                    949:                                    || str[j] == qchar)
1.1       christos  950:                                        break;
                    951:                        }
                    952:                        if (str[j] == history_expansion_char
                    953:                            && !strchr(history_no_expand_chars, str[j + 1])
                    954:                            && (!history_inhibit_expansion_function ||
1.40      christos  955:                            (*history_inhibit_expansion_function)(str,
                    956:                            (int)j) == 0))
1.1       christos  957:                                break;
                    958:                }
                    959:
1.40      christos  960:                if (str[j] && loop_again) {
1.1       christos  961:                        i = j;
1.40      christos  962:                        qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
1.1       christos  963:                        j++;
                    964:                        if (str[j] == history_expansion_char)
                    965:                                j++;
                    966:                        loop_again = 0;
                    967:                        goto loop;
                    968:                }
                    969:                len = i - start;
1.64      christos  970:                ADD_STRING(&str[start], len, 0);
1.1       christos  971:
1.40      christos  972:                if (str[i] == '\0' || str[i] != history_expansion_char) {
1.1       christos  973:                        len = j - i;
1.64      christos  974:                        ADD_STRING(&str[i], len, 0);
1.1       christos  975:                        if (start == 0)
1.40      christos  976:                                ret = 0;
1.1       christos  977:                        else
1.40      christos  978:                                ret = 1;
1.1       christos  979:                        break;
                    980:                }
1.40      christos  981:                ret = _history_expand_command (str, i, (j - i), &tmp);
                    982:                if (ret > 0 && tmp) {
                    983:                        len = strlen(tmp);
1.63      christos  984:                        ADD_STRING(tmp, len, 1);
1.66      christos  985:                }
                    986:                if (tmp) {
1.95      christos  987:                        el_free(tmp);
1.64      christos  988:                        tmp = NULL;
1.1       christos  989:                }
                    990:                i = j;
1.40      christos  991:        }
1.1       christos  992:
1.40      christos  993:        /* ret is 2 for "print only" option */
                    994:        if (ret == 2) {
                    995:                add_history(result);
1.1       christos  996: #ifdef GDB_411_HACK
                    997:                /* gdb 4.11 has been shipped with readline, where */
                    998:                /* history_expand() returned -1 when the line     */
                    999:                /* should not be executed; in readline 2.1+       */
                   1000:                /* it should return 2 in such a case              */
1.40      christos 1001:                ret = -1;
1.1       christos 1002: #endif
                   1003:        }
1.95      christos 1004:        el_free(*output);
1.1       christos 1005:        *output = result;
                   1006:
1.96      christos 1007:        return ret;
1.1       christos 1008: }
                   1009:
1.40      christos 1010: /*
                   1011: * Return a string consisting of arguments of "str" from "start" to "end".
                   1012: */
                   1013: char *
                   1014: history_arg_extract(int start, int end, const char *str)
                   1015: {
                   1016:        size_t  i, len, max;
1.84      christos 1017:        char    **arr, *result = NULL;
1.40      christos 1018:
                   1019:        arr = history_tokenize(str);
                   1020:        if (!arr)
1.84      christos 1021:                return NULL;
                   1022:        if (arr && *arr == NULL)
                   1023:                goto out;
1.40      christos 1024:
                   1025:        for (max = 0; arr[max]; max++)
                   1026:                continue;
                   1027:        max--;
                   1028:
                   1029:        if (start == '$')
1.80      christos 1030:                start = (int)max;
1.40      christos 1031:        if (end == '$')
1.80      christos 1032:                end = (int)max;
1.40      christos 1033:        if (end < 0)
1.80      christos 1034:                end = (int)max + end + 1;
1.40      christos 1035:        if (start < 0)
                   1036:                start = end;
                   1037:
1.84      christos 1038:        if (start < 0 || end < 0 || (size_t)start > max ||
                   1039:            (size_t)end > max || start > end)
                   1040:                goto out;
1.40      christos 1041:
1.99      christos 1042:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++)
1.40      christos 1043:                len += strlen(arr[i]) + 1;
                   1044:        len++;
1.95      christos 1045:        result = el_malloc(len * sizeof(*result));
1.40      christos 1046:        if (result == NULL)
1.84      christos 1047:                goto out;
1.40      christos 1048:
1.99      christos 1049:        for (i = (size_t)start, len = 0; i <= (size_t)end; i++) {
1.40      christos 1050:                (void)strcpy(result + len, arr[i]);
                   1051:                len += strlen(arr[i]);
1.77      lukem    1052:                if (i < (size_t)end)
1.40      christos 1053:                        result[len++] = ' ';
                   1054:        }
1.76      christos 1055:        result[len] = '\0';
1.40      christos 1056:
1.84      christos 1057: out:
1.40      christos 1058:        for (i = 0; arr[i]; i++)
1.95      christos 1059:                el_free(arr[i]);
                   1060:        el_free(arr);
1.40      christos 1061:
1.84      christos 1062:        return result;
1.40      christos 1063: }
1.11      lukem    1064:
1.1       christos 1065: /*
1.40      christos 1066:  * Parse the string into individual tokens,
                   1067:  * similar to how shell would do it.
1.1       christos 1068:  */
                   1069: char **
1.11      lukem    1070: history_tokenize(const char *str)
1.1       christos 1071: {
1.40      christos 1072:        int size = 1, idx = 0, i, start;
1.5       christos 1073:        size_t len;
1.1       christos 1074:        char **result = NULL, *temp, delim = '\0';
                   1075:
1.40      christos 1076:        for (i = 0; str[i];) {
1.4       christos 1077:                while (isspace((unsigned char) str[i]))
1.1       christos 1078:                        i++;
                   1079:                start = i;
1.40      christos 1080:                for (; str[i];) {
1.9       jdolecek 1081:                        if (str[i] == '\\') {
1.14      jdolecek 1082:                                if (str[i+1] != '\0')
1.9       jdolecek 1083:                                        i++;
                   1084:                        } else if (str[i] == delim)
1.1       christos 1085:                                delim = '\0';
                   1086:                        else if (!delim &&
1.11      lukem    1087:                                    (isspace((unsigned char) str[i]) ||
                   1088:                                strchr("()<>;&|$", str[i])))
1.1       christos 1089:                                break;
                   1090:                        else if (!delim && strchr("'`\"", str[i]))
                   1091:                                delim = str[i];
1.40      christos 1092:                        if (str[i])
                   1093:                                i++;
1.1       christos 1094:                }
                   1095:
1.40      christos 1096:                if (idx + 2 >= size) {
1.23      christos 1097:                        char **nresult;
1.1       christos 1098:                        size <<= 1;
1.99      christos 1099:                        nresult = el_realloc(result, (size_t)size * sizeof(*nresult));
1.23      christos 1100:                        if (nresult == NULL) {
1.95      christos 1101:                                el_free(result);
1.23      christos 1102:                                return NULL;
                   1103:                        }
                   1104:                        result = nresult;
1.1       christos 1105:                }
1.99      christos 1106:                len = (size_t)i - (size_t)start;
                   1107:                temp = el_malloc((size_t)(len + 1) * sizeof(*temp));
1.23      christos 1108:                if (temp == NULL) {
1.40      christos 1109:                        for (i = 0; i < idx; i++)
1.95      christos 1110:                                el_free(result[i]);
                   1111:                        el_free(result);
1.23      christos 1112:                        return NULL;
                   1113:                }
1.40      christos 1114:                (void)strncpy(temp, &str[start], len);
1.1       christos 1115:                temp[len] = '\0';
1.40      christos 1116:                result[idx++] = temp;
                   1117:                result[idx] = NULL;
                   1118:                if (str[i])
                   1119:                        i++;
1.1       christos 1120:        }
1.96      christos 1121:        return result;
1.1       christos 1122: }
                   1123:
1.11      lukem    1124:
1.1       christos 1125: /*
                   1126:  * limit size of history record to ``max'' events
                   1127:  */
                   1128: void
1.11      lukem    1129: stifle_history(int max)
1.1       christos 1130: {
1.92      christos 1131:        HistEvent ev;
1.1       christos 1132:
                   1133:        if (h == NULL || e == NULL)
                   1134:                rl_initialize();
                   1135:
1.92      christos 1136:        if (history(h, &ev, H_SETSIZE, max) == 0)
1.1       christos 1137:                max_input_history = max;
                   1138: }
                   1139:
1.11      lukem    1140:
1.1       christos 1141: /*
                   1142:  * "unlimit" size of history - set the limit to maximum allowed int value
                   1143:  */
                   1144: int
1.11      lukem    1145: unstifle_history(void)
1.1       christos 1146: {
1.92      christos 1147:        HistEvent ev;
1.1       christos 1148:        int omax;
                   1149:
1.92      christos 1150:        history(h, &ev, H_SETSIZE, INT_MAX);
1.1       christos 1151:        omax = max_input_history;
                   1152:        max_input_history = INT_MAX;
1.96      christos 1153:        return omax;            /* some value _must_ be returned */
1.1       christos 1154: }
                   1155:
1.11      lukem    1156:
1.1       christos 1157: int
1.11      lukem    1158: history_is_stifled(void)
1.1       christos 1159: {
1.11      lukem    1160:
1.1       christos 1161:        /* cannot return true answer */
1.96      christos 1162:        return max_input_history != INT_MAX;
1.1       christos 1163: }
                   1164:
1.85      christos 1165: static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
                   1166:
                   1167: int
                   1168: history_truncate_file (const char *filename, int nlines)
                   1169: {
                   1170:        int ret = 0;
                   1171:        FILE *fp, *tp;
                   1172:        char template[sizeof(_history_tmp_template)];
                   1173:        char buf[4096];
                   1174:        int fd;
                   1175:        char *cp;
                   1176:        off_t off;
                   1177:        int count = 0;
                   1178:        ssize_t left = 0;
                   1179:
                   1180:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1181:                return errno;
                   1182:        if ((fp = fopen(filename, "r+")) == NULL)
                   1183:                return errno;
                   1184:        strcpy(template, _history_tmp_template);
                   1185:        if ((fd = mkstemp(template)) == -1) {
                   1186:                ret = errno;
                   1187:                goto out1;
                   1188:        }
                   1189:
                   1190:        if ((tp = fdopen(fd, "r+")) == NULL) {
                   1191:                close(fd);
                   1192:                ret = errno;
                   1193:                goto out2;
                   1194:        }
                   1195:
                   1196:        for(;;) {
1.98      christos 1197:                if (fread(buf, sizeof(buf), (size_t)1, fp) != 1) {
1.85      christos 1198:                        if (ferror(fp)) {
                   1199:                                ret = errno;
                   1200:                                break;
                   1201:                        }
                   1202:                        if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
                   1203:                            (off_t)-1) {
                   1204:                                ret = errno;
                   1205:                                break;
                   1206:                        }
1.99      christos 1207:                        left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), fp);
1.85      christos 1208:                        if (ferror(fp)) {
                   1209:                                ret = errno;
                   1210:                                break;
                   1211:                        }
                   1212:                        if (left == 0) {
                   1213:                                count--;
                   1214:                                left = sizeof(buf);
1.98      christos 1215:                        } else if (fwrite(buf, (size_t)left, (size_t)1, tp)
                   1216:                            != 1) {
1.85      christos 1217:                                ret = errno;
                   1218:                                break;
                   1219:                        }
                   1220:                        fflush(tp);
                   1221:                        break;
                   1222:                }
1.98      christos 1223:                if (fwrite(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1224:                        ret = errno;
                   1225:                        break;
                   1226:                }
                   1227:                count++;
                   1228:        }
                   1229:        if (ret)
                   1230:                goto out3;
                   1231:        cp = buf + left - 1;
                   1232:        if(*cp != '\n')
                   1233:                cp++;
                   1234:        for(;;) {
                   1235:                while (--cp >= buf) {
                   1236:                        if (*cp == '\n') {
                   1237:                                if (--nlines == 0) {
                   1238:                                        if (++cp >= buf + sizeof(buf)) {
                   1239:                                                count++;
                   1240:                                                cp = buf;
                   1241:                                        }
                   1242:                                        break;
                   1243:                                }
                   1244:                        }
                   1245:                }
                   1246:                if (nlines <= 0 || count == 0)
                   1247:                        break;
                   1248:                count--;
                   1249:                if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
                   1250:                        ret = errno;
                   1251:                        break;
                   1252:                }
1.98      christos 1253:                if (fread(buf, sizeof(buf), (size_t)1, tp) != 1) {
1.85      christos 1254:                        if (ferror(tp)) {
                   1255:                                ret = errno;
                   1256:                                break;
                   1257:                        }
                   1258:                        ret = EAGAIN;
                   1259:                        break;
                   1260:                }
                   1261:                cp = buf + sizeof(buf);
                   1262:        }
                   1263:
                   1264:        if (ret || nlines > 0)
                   1265:                goto out3;
                   1266:
1.98      christos 1267:        if (fseeko(fp, (off_t)0, SEEK_SET) == (off_t)-1) {
1.85      christos 1268:                ret = errno;
                   1269:                goto out3;
                   1270:        }
                   1271:
                   1272:        if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
                   1273:            (off_t)-1) {
                   1274:                ret = errno;
                   1275:                goto out3;
                   1276:        }
                   1277:
                   1278:        for(;;) {
1.99      christos 1279:                if ((left = (ssize_t)fread(buf, (size_t)1, sizeof(buf), tp)) == 0) {
1.85      christos 1280:                        if (ferror(fp))
                   1281:                                ret = errno;
                   1282:                        break;
                   1283:                }
1.98      christos 1284:                if (fwrite(buf, (size_t)left, (size_t)1, fp) != 1) {
1.85      christos 1285:                        ret = errno;
                   1286:                        break;
                   1287:                }
                   1288:        }
                   1289:        fflush(fp);
                   1290:        if((off = ftello(fp)) > 0)
                   1291:                (void)ftruncate(fileno(fp), off);
                   1292: out3:
                   1293:        fclose(tp);
                   1294: out2:
                   1295:        unlink(template);
                   1296: out1:
                   1297:        fclose(fp);
                   1298:
                   1299:        return ret;
                   1300: }
                   1301:
1.11      lukem    1302:
1.1       christos 1303: /*
                   1304:  * read history from a file given
                   1305:  */
                   1306: int
1.11      lukem    1307: read_history(const char *filename)
1.1       christos 1308: {
1.92      christos 1309:        HistEvent ev;
1.1       christos 1310:
                   1311:        if (h == NULL || e == NULL)
                   1312:                rl_initialize();
1.85      christos 1313:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1314:                return errno;
1.96      christos 1315:        return history(h, &ev, H_LOAD, filename) == -1 ?
                   1316:            (errno ? errno : EINVAL) : 0;
1.1       christos 1317: }
                   1318:
1.11      lukem    1319:
1.1       christos 1320: /*
                   1321:  * write history to a file given
                   1322:  */
                   1323: int
1.11      lukem    1324: write_history(const char *filename)
1.1       christos 1325: {
1.92      christos 1326:        HistEvent ev;
1.1       christos 1327:
                   1328:        if (h == NULL || e == NULL)
                   1329:                rl_initialize();
1.85      christos 1330:        if (filename == NULL && (filename = _default_history_file()) == NULL)
                   1331:                return errno;
1.96      christos 1332:        return history(h, &ev, H_SAVE, filename) == -1 ?
                   1333:            (errno ? errno : EINVAL) : 0;
1.1       christos 1334: }
                   1335:
1.11      lukem    1336:
1.1       christos 1337: /*
                   1338:  * returns history ``num''th event
                   1339:  *
                   1340:  * returned pointer points to static variable
                   1341:  */
1.2       christos 1342: HIST_ENTRY *
1.11      lukem    1343: history_get(int num)
1.1       christos 1344: {
                   1345:        static HIST_ENTRY she;
1.92      christos 1346:        HistEvent ev;
1.40      christos 1347:        int curr_num;
1.1       christos 1348:
                   1349:        if (h == NULL || e == NULL)
                   1350:                rl_initialize();
                   1351:
1.40      christos 1352:        /* save current position */
1.92      christos 1353:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1354:                return NULL;
1.1       christos 1355:        curr_num = ev.num;
1.40      christos 1356:
1.85      christos 1357:        /* start from the oldest */
1.92      christos 1358:        if (history(h, &ev, H_LAST) != 0)
1.96      christos 1359:                return NULL;    /* error */
1.40      christos 1360:
1.85      christos 1361:        /* look forwards for event matching specified offset */
1.92      christos 1362:        if (history(h, &ev, H_NEXT_EVDATA, num, &she.data))
1.96      christos 1363:                return NULL;
1.1       christos 1364:
1.92      christos 1365:        she.line = ev.str;
1.1       christos 1366:
1.40      christos 1367:        /* restore pointer to where it was */
1.92      christos 1368:        (void)history(h, &ev, H_SET, curr_num);
1.1       christos 1369:
1.96      christos 1370:        return &she;
1.1       christos 1371: }
                   1372:
1.11      lukem    1373:
1.1       christos 1374: /*
                   1375:  * add the line to history table
                   1376:  */
                   1377: int
1.11      lukem    1378: add_history(const char *line)
1.1       christos 1379: {
1.92      christos 1380:        HistEvent ev;
1.1       christos 1381:
1.104     christos 1382:        if (line == NULL)
                   1383:                return 0;
                   1384:
1.1       christos 1385:        if (h == NULL || e == NULL)
                   1386:                rl_initialize();
                   1387:
1.92      christos 1388:        (void)history(h, &ev, H_ENTER, line);
                   1389:        if (history(h, &ev, H_GETSIZE) == 0)
1.1       christos 1390:                history_length = ev.num;
                   1391:
1.96      christos 1392:        return !(history_length > 0); /* return 0 if all is okay */
1.1       christos 1393: }
                   1394:
1.11      lukem    1395:
1.1       christos 1396: /*
1.58      christos 1397:  * remove the specified entry from the history list and return it.
                   1398:  */
                   1399: HIST_ENTRY *
                   1400: remove_history(int num)
                   1401: {
1.85      christos 1402:        HIST_ENTRY *he;
1.92      christos 1403:        HistEvent ev;
1.58      christos 1404:
                   1405:        if (h == NULL || e == NULL)
                   1406:                rl_initialize();
                   1407:
1.95      christos 1408:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.58      christos 1409:                return NULL;
                   1410:
1.92      christos 1411:        if (history(h, &ev, H_DELDATA, num, &he->data) != 0) {
1.95      christos 1412:                el_free(he);
1.71      christos 1413:                return NULL;
1.85      christos 1414:        }
1.71      christos 1415:
1.92      christos 1416:        he->line = ev.str;
                   1417:        if (history(h, &ev, H_GETSIZE) == 0)
1.85      christos 1418:                history_length = ev.num;
1.58      christos 1419:
1.85      christos 1420:        return he;
1.58      christos 1421: }
                   1422:
                   1423:
                   1424: /*
1.85      christos 1425:  * replace the line and data of the num-th entry
                   1426:  */
                   1427: HIST_ENTRY *
                   1428: replace_history_entry(int num, const char *line, histdata_t data)
                   1429: {
                   1430:        HIST_ENTRY *he;
1.92      christos 1431:        HistEvent ev;
1.85      christos 1432:        int curr_num;
                   1433:
                   1434:        if (h == NULL || e == NULL)
                   1435:                rl_initialize();
                   1436:
                   1437:        /* save current position */
1.92      christos 1438:        if (history(h, &ev, H_CURR) != 0)
1.85      christos 1439:                return NULL;
                   1440:        curr_num = ev.num;
                   1441:
                   1442:        /* start from the oldest */
1.92      christos 1443:        if (history(h, &ev, H_LAST) != 0)
1.85      christos 1444:                return NULL;    /* error */
                   1445:
1.95      christos 1446:        if ((he = el_malloc(sizeof(*he))) == NULL)
1.85      christos 1447:                return NULL;
                   1448:
                   1449:        /* look forwards for event matching specified offset */
1.92      christos 1450:        if (history(h, &ev, H_NEXT_EVDATA, num, &he->data))
1.85      christos 1451:                goto out;
                   1452:
1.92      christos 1453:        he->line = strdup(ev.str);
1.85      christos 1454:        if (he->line == NULL)
                   1455:                goto out;
                   1456:
1.92      christos 1457:        if (history(h, &ev, H_REPLACE, line, data))
1.85      christos 1458:                goto out;
                   1459:
                   1460:        /* restore pointer to where it was */
1.92      christos 1461:        if (history(h, &ev, H_SET, curr_num))
1.85      christos 1462:                goto out;
                   1463:
                   1464:        return he;
                   1465: out:
1.95      christos 1466:        el_free(he);
1.85      christos 1467:        return NULL;
                   1468: }
                   1469:
                   1470: /*
1.1       christos 1471:  * clear the history list - delete all entries
                   1472:  */
                   1473: void
1.11      lukem    1474: clear_history(void)
1.1       christos 1475: {
1.92      christos 1476:        HistEvent ev;
1.11      lukem    1477:
1.92      christos 1478:        (void)history(h, &ev, H_CLEAR);
1.85      christos 1479:        history_length = 0;
1.1       christos 1480: }
                   1481:
1.11      lukem    1482:
1.1       christos 1483: /*
                   1484:  * returns offset of the current history event
                   1485:  */
                   1486: int
1.11      lukem    1487: where_history(void)
1.1       christos 1488: {
1.92      christos 1489:        HistEvent ev;
1.1       christos 1490:        int curr_num, off;
                   1491:
1.92      christos 1492:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1493:                return 0;
1.1       christos 1494:        curr_num = ev.num;
                   1495:
1.92      christos 1496:        (void)history(h, &ev, H_FIRST);
1.1       christos 1497:        off = 1;
1.92      christos 1498:        while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
1.1       christos 1499:                off++;
                   1500:
1.96      christos 1501:        return off;
1.1       christos 1502: }
                   1503:
1.11      lukem    1504:
1.1       christos 1505: /*
                   1506:  * returns current history event or NULL if there is no such event
                   1507:  */
1.2       christos 1508: HIST_ENTRY *
1.11      lukem    1509: current_history(void)
1.1       christos 1510: {
1.11      lukem    1511:
1.96      christos 1512:        return _move_history(H_CURR);
1.1       christos 1513: }
                   1514:
1.11      lukem    1515:
1.1       christos 1516: /*
                   1517:  * returns total number of bytes history events' data are using
                   1518:  */
                   1519: int
1.11      lukem    1520: history_total_bytes(void)
1.1       christos 1521: {
1.92      christos 1522:        HistEvent ev;
1.80      christos 1523:        int curr_num;
                   1524:        size_t size;
1.1       christos 1525:
1.92      christos 1526:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1527:                return -1;
1.1       christos 1528:        curr_num = ev.num;
                   1529:
1.92      christos 1530:        (void)history(h, &ev, H_FIRST);
1.1       christos 1531:        size = 0;
                   1532:        do
1.92      christos 1533:                size += strlen(ev.str) * sizeof(*ev.str);
                   1534:        while (history(h, &ev, H_NEXT) == 0);
1.1       christos 1535:
                   1536:        /* get to the same position as before */
1.92      christos 1537:        history(h, &ev, H_PREV_EVENT, curr_num);
1.1       christos 1538:
1.96      christos 1539:        return (int)size;
1.1       christos 1540: }
                   1541:
1.11      lukem    1542:
1.1       christos 1543: /*
                   1544:  * sets the position in the history list to ``pos''
                   1545:  */
                   1546: int
1.11      lukem    1547: history_set_pos(int pos)
1.1       christos 1548: {
1.92      christos 1549:        HistEvent ev;
1.40      christos 1550:        int curr_num;
1.1       christos 1551:
1.85      christos 1552:        if (pos >= history_length || pos < 0)
1.96      christos 1553:                return -1;
1.1       christos 1554:
1.92      christos 1555:        (void)history(h, &ev, H_CURR);
1.1       christos 1556:        curr_num = ev.num;
                   1557:
1.85      christos 1558:        /*
                   1559:         * use H_DELDATA to set to nth history (without delete) by passing
                   1560:         * (void **)-1
                   1561:         */
1.92      christos 1562:        if (history(h, &ev, H_DELDATA, pos, (void **)-1)) {
                   1563:                (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1564:                return -1;
1.1       christos 1565:        }
1.96      christos 1566:        return 0;
1.1       christos 1567: }
                   1568:
1.11      lukem    1569:
1.1       christos 1570: /*
                   1571:  * returns previous event in history and shifts pointer accordingly
                   1572:  */
1.2       christos 1573: HIST_ENTRY *
1.11      lukem    1574: previous_history(void)
1.1       christos 1575: {
1.11      lukem    1576:
1.96      christos 1577:        return _move_history(H_PREV);
1.1       christos 1578: }
                   1579:
1.11      lukem    1580:
1.1       christos 1581: /*
                   1582:  * returns next event in history and shifts pointer accordingly
                   1583:  */
1.2       christos 1584: HIST_ENTRY *
1.11      lukem    1585: next_history(void)
1.1       christos 1586: {
1.11      lukem    1587:
1.96      christos 1588:        return _move_history(H_NEXT);
1.1       christos 1589: }
                   1590:
1.11      lukem    1591:
1.1       christos 1592: /*
1.40      christos 1593:  * searches for first history event containing the str
1.1       christos 1594:  */
1.40      christos 1595: int
                   1596: history_search(const char *str, int direction)
1.11      lukem    1597: {
1.92      christos 1598:        HistEvent ev;
                   1599:        const char *strp;
1.11      lukem    1600:        int curr_num;
1.1       christos 1601:
1.92      christos 1602:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1603:                return -1;
1.1       christos 1604:        curr_num = ev.num;
                   1605:
                   1606:        for (;;) {
1.92      christos 1607:                if ((strp = strstr(ev.str, str)) != NULL)
1.96      christos 1608:                        return (int)(strp - ev.str);
1.92      christos 1609:                if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
1.1       christos 1610:                        break;
                   1611:        }
1.92      christos 1612:        (void)history(h, &ev, H_SET, curr_num);
1.96      christos 1613:        return -1;
1.1       christos 1614: }
                   1615:
1.11      lukem    1616:
1.1       christos 1617: /*
                   1618:  * searches for first history event beginning with str
                   1619:  */
                   1620: int
1.11      lukem    1621: history_search_prefix(const char *str, int direction)
1.1       christos 1622: {
1.92      christos 1623:        HistEvent ev;
1.11      lukem    1624:
1.92      christos 1625:        return (history(h, &ev, direction < 0 ?
1.88      christos 1626:            H_PREV_STR : H_NEXT_STR, str));
1.1       christos 1627: }
                   1628:
1.11      lukem    1629:
1.1       christos 1630: /*
                   1631:  * search for event in history containing str, starting at offset
                   1632:  * abs(pos); continue backward, if pos<0, forward otherwise
                   1633:  */
1.5       christos 1634: /* ARGSUSED */
1.1       christos 1635: int
1.40      christos 1636: history_search_pos(const char *str,
1.30      christos 1637:                   int direction __attribute__((__unused__)), int pos)
1.1       christos 1638: {
1.92      christos 1639:        HistEvent ev;
1.11      lukem    1640:        int curr_num, off;
1.1       christos 1641:
                   1642:        off = (pos > 0) ? pos : -pos;
                   1643:        pos = (pos > 0) ? 1 : -1;
                   1644:
1.92      christos 1645:        if (history(h, &ev, H_CURR) != 0)
1.96      christos 1646:                return -1;
1.1       christos 1647:        curr_num = ev.num;
                   1648:
1.92      christos 1649:        if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
1.96      christos 1650:                return -1;
1.1       christos 1651:
                   1652:        for (;;) {
1.92      christos 1653:                if (strstr(ev.str, str))
1.96      christos 1654:                        return off;
1.92      christos 1655:                if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
1.1       christos 1656:                        break;
                   1657:        }
                   1658:
                   1659:        /* set "current" pointer back to previous state */
1.92      christos 1660:        (void)history(h, &ev,
1.88      christos 1661:            pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
1.1       christos 1662:
1.96      christos 1663:        return -1;
1.1       christos 1664: }
                   1665:
                   1666:
                   1667: /********************************/
1.40      christos 1668: /* completion functions */
1.1       christos 1669:
1.57      christos 1670: char *
                   1671: tilde_expand(char *name)
                   1672: {
                   1673:        return fn_tilde_expand(name);
                   1674: }
                   1675:
                   1676: char *
                   1677: filename_completion_function(const char *name, int state)
                   1678: {
                   1679:        return fn_filename_completion_function(name, state);
                   1680: }
                   1681:
1.1       christos 1682: /*
                   1683:  * a completion generator for usernames; returns _first_ username
                   1684:  * which starts with supplied text
                   1685:  * text contains a partial username preceded by random character
1.94      christos 1686:  * (usually '~'); state resets search from start (??? should we do that anyway)
1.1       christos 1687:  * it's callers responsibility to free returned value
                   1688:  */
1.11      lukem    1689: char *
                   1690: username_completion_function(const char *text, int state)
1.1       christos 1691: {
1.94      christos 1692: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1693:        struct passwd pwres;
1.50      christos 1694:        char pwbuf[1024];
1.94      christos 1695: #endif
                   1696:        struct passwd *pass = NULL;
1.1       christos 1697:
                   1698:        if (text[0] == '\0')
1.96      christos 1699:                return NULL;
1.1       christos 1700:
                   1701:        if (*text == '~')
                   1702:                text++;
                   1703:
                   1704:        if (state == 0)
                   1705:                setpwent();
                   1706:
1.94      christos 1707:        while (
                   1708: #if defined(HAVE_GETPW_R_POSIX) || defined(HAVE_GETPW_R_DRAFT)
                   1709:            getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pass) == 0 && pass != NULL
                   1710: #else
                   1711:            (pass = getpwent()) != NULL
                   1712: #endif
                   1713:            && text[0] == pass->pw_name[0]
                   1714:            && strcmp(text, pass->pw_name) == 0)
                   1715:                continue;
1.1       christos 1716:
1.94      christos 1717:        if (pass == NULL) {
1.1       christos 1718:                endpwent();
1.85      christos 1719:                return NULL;
1.1       christos 1720:        }
1.94      christos 1721:        return strdup(pass->pw_name);
1.1       christos 1722: }
                   1723:
1.11      lukem    1724:
1.1       christos 1725: /*
1.46      christos 1726:  * el-compatible wrapper to send TSTP on ^Z
                   1727:  */
                   1728: /* ARGSUSED */
                   1729: static unsigned char
                   1730: _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
                   1731: {
                   1732:        (void)kill(0, SIGTSTP);
                   1733:        return CC_NORM;
                   1734: }
1.11      lukem    1735:
1.1       christos 1736: /*
1.12      jdolecek 1737:  * Display list of strings in columnar format on readline's output stream.
                   1738:  * 'matches' is list of strings, 'len' is number of strings in 'matches',
                   1739:  * 'max' is maximum length of string in 'matches'.
                   1740:  */
                   1741: void
1.53      dsl      1742: rl_display_match_list(char **matches, int len, int max)
1.12      jdolecek 1743: {
                   1744:
1.81      christos 1745:        fn_display_match_list(e, matches, (size_t)len, (size_t)max);
1.1       christos 1746: }
                   1747:
1.56      christos 1748: static const char *
                   1749: /*ARGSUSED*/
                   1750: _rl_completion_append_character_function(const char *dummy
                   1751:     __attribute__((__unused__)))
                   1752: {
                   1753:        static char buf[2];
1.99      christos 1754:        buf[0] = (char)rl_completion_append_character;
1.76      christos 1755:        buf[1] = '\0';
1.56      christos 1756:        return buf;
                   1757: }
                   1758:
1.11      lukem    1759:
1.1       christos 1760: /*
                   1761:  * complete word at current point
                   1762:  */
1.53      dsl      1763: /* ARGSUSED */
1.1       christos 1764: int
1.53      dsl      1765: rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
1.1       christos 1766: {
1.86      christos 1767: #ifdef WIDECHAR
                   1768:        static ct_buffer_t wbreak_conv, sprefix_conv;
                   1769: #endif
1.102     christos 1770:        char *breakchars;
1.86      christos 1771:
1.1       christos 1772:        if (h == NULL || e == NULL)
                   1773:                rl_initialize();
                   1774:
                   1775:        if (rl_inhibit_completion) {
1.47      christos 1776:                char arr[2];
                   1777:                arr[0] = (char)invoking_key;
                   1778:                arr[1] = '\0';
                   1779:                el_insertstr(e, arr);
1.96      christos 1780:                return CC_REFRESH;
1.53      dsl      1781:        }
                   1782:
1.102     christos 1783:        if (rl_completion_word_break_hook != NULL)
                   1784:                breakchars = (*rl_completion_word_break_hook)();
                   1785:        else
                   1786:                breakchars = rl_basic_word_break_characters;
                   1787:
1.53      dsl      1788:        /* Just look at how many global variables modify this operation! */
                   1789:        return fn_complete(e,
                   1790:            (CPFunction *)rl_completion_entry_function,
                   1791:            rl_attempted_completion_function,
1.86      christos 1792:            ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
1.102     christos 1793:            ct_decode_string(breakchars, &sprefix_conv),
1.81      christos 1794:            _rl_completion_append_character_function,
                   1795:            (size_t)rl_completion_query_items,
1.53      dsl      1796:            &rl_completion_type, &rl_attempted_completion_over,
                   1797:            &rl_point, &rl_end);
1.92      christos 1798:
                   1799:
1.1       christos 1800: }
                   1801:
1.11      lukem    1802:
1.53      dsl      1803: /* ARGSUSED */
                   1804: static unsigned char
                   1805: _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
                   1806: {
                   1807:        return (unsigned char)rl_complete(0, ch);
                   1808: }
                   1809:
1.1       christos 1810: /*
1.7       simonb   1811:  * misc other functions
1.1       christos 1812:  */
                   1813:
                   1814: /*
                   1815:  * bind key c to readline-type function func
                   1816:  */
                   1817: int
1.85      christos 1818: rl_bind_key(int c, rl_command_func_t *func)
1.1       christos 1819: {
1.11      lukem    1820:        int retval = -1;
1.1       christos 1821:
                   1822:        if (h == NULL || e == NULL)
                   1823:                rl_initialize();
                   1824:
                   1825:        if (func == rl_insert) {
                   1826:                /* XXX notice there is no range checking of ``c'' */
                   1827:                e->el_map.key[c] = ED_INSERT;
                   1828:                retval = 0;
                   1829:        }
1.96      christos 1830:        return retval;
1.1       christos 1831: }
                   1832:
1.11      lukem    1833:
1.1       christos 1834: /*
                   1835:  * read one key from input - handles chars pushed back
                   1836:  * to input stream also
                   1837:  */
                   1838: int
1.11      lukem    1839: rl_read_key(void)
1.1       christos 1840: {
1.11      lukem    1841:        char fooarr[2 * sizeof(int)];
1.1       christos 1842:
                   1843:        if (e == NULL || h == NULL)
                   1844:                rl_initialize();
                   1845:
1.96      christos 1846:        return el_getc(e, fooarr);
1.1       christos 1847: }
                   1848:
1.11      lukem    1849:
1.1       christos 1850: /*
                   1851:  * reset the terminal
                   1852:  */
1.5       christos 1853: /* ARGSUSED */
1.1       christos 1854: void
1.30      christos 1855: rl_reset_terminal(const char *p __attribute__((__unused__)))
1.1       christos 1856: {
1.11      lukem    1857:
1.1       christos 1858:        if (h == NULL || e == NULL)
                   1859:                rl_initialize();
                   1860:        el_reset(e);
                   1861: }
                   1862:
1.11      lukem    1863:
1.1       christos 1864: /*
                   1865:  * insert character ``c'' back into input stream, ``count'' times
                   1866:  */
                   1867: int
1.11      lukem    1868: rl_insert(int count, int c)
1.1       christos 1869: {
1.11      lukem    1870:        char arr[2];
1.1       christos 1871:
                   1872:        if (h == NULL || e == NULL)
                   1873:                rl_initialize();
                   1874:
                   1875:        /* XXX - int -> char conversion can lose on multichars */
1.99      christos 1876:        arr[0] = (char)c;
1.1       christos 1877:        arr[1] = '\0';
                   1878:
                   1879:        for (; count > 0; count--)
                   1880:                el_push(e, arr);
                   1881:
1.96      christos 1882:        return 0;
1.35      christos 1883: }
                   1884:
1.85      christos 1885: int
                   1886: rl_insert_text(const char *text)
                   1887: {
                   1888:        if (!text || *text == 0)
1.96      christos 1889:                return 0;
1.85      christos 1890:
                   1891:        if (h == NULL || e == NULL)
                   1892:                rl_initialize();
                   1893:
                   1894:        if (el_insertstr(e, text) < 0)
1.96      christos 1895:                return 0;
1.85      christos 1896:        return (int)strlen(text);
                   1897: }
                   1898:
1.35      christos 1899: /*ARGSUSED*/
                   1900: int
1.97      christos 1901: rl_newline(int count __attribute__((__unused__)),
                   1902:     int c __attribute__((__unused__)))
1.35      christos 1903: {
                   1904:        /*
                   1905:         * Readline-4.0 appears to ignore the args.
                   1906:         */
                   1907:        return rl_insert(1, '\n');
                   1908: }
                   1909:
                   1910: /*ARGSUSED*/
                   1911: static unsigned char
1.97      christos 1912: rl_bind_wrapper(EditLine *el __attribute__((__unused__)), unsigned char c)
1.35      christos 1913: {
                   1914:        if (map[c] == NULL)
                   1915:            return CC_ERROR;
1.49      christos 1916:
                   1917:        _rl_update_pos();
                   1918:
1.35      christos 1919:        (*map[c])(NULL, c);
1.38      christos 1920:
                   1921:        /* If rl_done was set by the above call, deal with it here */
                   1922:        if (rl_done)
                   1923:                return CC_EOF;
                   1924:
1.35      christos 1925:        return CC_NORM;
                   1926: }
                   1927:
                   1928: int
                   1929: rl_add_defun(const char *name, Function *fun, int c)
                   1930: {
                   1931:        char dest[8];
1.77      lukem    1932:        if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
1.35      christos 1933:                return -1;
                   1934:        map[(unsigned char)c] = fun;
                   1935:        el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
1.37      christos 1936:        vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
1.106     christos 1937:        el_set(e, EL_BIND, dest, name, NULL);
1.35      christos 1938:        return 0;
                   1939: }
                   1940:
                   1941: void
1.101     matt     1942: rl_callback_read_char(void)
1.35      christos 1943: {
1.36      christos 1944:        int count = 0, done = 0;
1.35      christos 1945:        const char *buf = el_gets(e, &count);
                   1946:        char *wbuf;
                   1947:
                   1948:        if (buf == NULL || count-- <= 0)
                   1949:                return;
1.61      christos 1950:        if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
1.36      christos 1951:                done = 1;
                   1952:        if (buf[count] == '\n' || buf[count] == '\r')
                   1953:                done = 2;
                   1954:
                   1955:        if (done && rl_linefunc != NULL) {
1.35      christos 1956:                el_set(e, EL_UNBUFFERED, 0);
1.36      christos 1957:                if (done == 2) {
                   1958:                    if ((wbuf = strdup(buf)) != NULL)
                   1959:                        wbuf[count] = '\0';
                   1960:                } else
                   1961:                        wbuf = NULL;
1.35      christos 1962:                (*(void (*)(const char *))rl_linefunc)(wbuf);
1.85      christos 1963:                //el_set(e, EL_UNBUFFERED, 1);
1.35      christos 1964:        }
                   1965: }
                   1966:
                   1967: void
1.72      christos 1968: rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
1.35      christos 1969: {
                   1970:        if (e == NULL) {
                   1971:                rl_initialize();
                   1972:        }
1.78      christos 1973:        (void)rl_set_prompt(prompt);
1.35      christos 1974:        rl_linefunc = linefunc;
                   1975:        el_set(e, EL_UNBUFFERED, 1);
                   1976: }
                   1977:
                   1978: void
                   1979: rl_callback_handler_remove(void)
                   1980: {
                   1981:        el_set(e, EL_UNBUFFERED, 0);
1.72      christos 1982:        rl_linefunc = NULL;
1.35      christos 1983: }
                   1984:
                   1985: void
                   1986: rl_redisplay(void)
                   1987: {
                   1988:        char a[2];
1.99      christos 1989:        a[0] = (char)e->el_tty.t_c[TS_IO][C_REPRINT];
1.35      christos 1990:        a[1] = '\0';
                   1991:        el_push(e, a);
                   1992: }
                   1993:
                   1994: int
                   1995: rl_get_previous_history(int count, int key)
                   1996: {
                   1997:        char a[2];
1.99      christos 1998:        a[0] = (char)key;
1.35      christos 1999:        a[1] = '\0';
                   2000:        while (count--)
                   2001:                el_push(e, a);
                   2002:        return 0;
1.38      christos 2003: }
                   2004:
                   2005: void
                   2006: /*ARGSUSED*/
1.97      christos 2007: rl_prep_terminal(int meta_flag __attribute__((__unused__)))
1.38      christos 2008: {
                   2009:        el_set(e, EL_PREP_TERM, 1);
                   2010: }
                   2011:
                   2012: void
1.68      christos 2013: rl_deprep_terminal(void)
1.38      christos 2014: {
                   2015:        el_set(e, EL_PREP_TERM, 0);
                   2016: }
                   2017:
                   2018: int
                   2019: rl_read_init_file(const char *s)
                   2020: {
1.96      christos 2021:        return el_source(e, s);
1.38      christos 2022: }
                   2023:
                   2024: int
                   2025: rl_parse_and_bind(const char *line)
                   2026: {
                   2027:        const char **argv;
                   2028:        int argc;
                   2029:        Tokenizer *tok;
                   2030:
                   2031:        tok = tok_init(NULL);
1.44      lukem    2032:        tok_str(tok, line, &argc, &argv);
1.38      christos 2033:        argc = el_parse(e, argc, argv);
                   2034:        tok_end(tok);
1.96      christos 2035:        return argc ? 1 : 0;
1.38      christos 2036: }
                   2037:
1.51      christos 2038: int
                   2039: rl_variable_bind(const char *var, const char *value)
                   2040: {
                   2041:        /*
                   2042:         * The proper return value is undocument, but this is what the
                   2043:         * readline source seems to do.
                   2044:         */
1.106     christos 2045:        return el_set(e, EL_BIND, "", var, value, NULL) == -1 ? 1 : 0;
1.51      christos 2046: }
                   2047:
1.38      christos 2048: void
                   2049: rl_stuff_char(int c)
                   2050: {
                   2051:        char buf[2];
                   2052:
1.99      christos 2053:        buf[0] = (char)c;
1.38      christos 2054:        buf[1] = '\0';
                   2055:        el_insertstr(e, buf);
                   2056: }
                   2057:
                   2058: static int
                   2059: _rl_event_read_char(EditLine *el, char *cp)
                   2060: {
1.80      christos 2061:        int     n;
                   2062:        ssize_t num_read = 0;
1.38      christos 2063:
1.76      christos 2064:        *cp = '\0';
1.38      christos 2065:        while (rl_event_hook) {
                   2066:
                   2067:                (*rl_event_hook)();
                   2068:
                   2069: #if defined(FIONREAD)
                   2070:                if (ioctl(el->el_infd, FIONREAD, &n) < 0)
1.96      christos 2071:                        return -1;
1.38      christos 2072:                if (n)
1.98      christos 2073:                        num_read = read(el->el_infd, cp, (size_t)1);
1.38      christos 2074:                else
                   2075:                        num_read = 0;
                   2076: #elif defined(F_SETFL) && defined(O_NDELAY)
                   2077:                if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
1.96      christos 2078:                        return -1;
1.38      christos 2079:                if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
1.96      christos 2080:                        return -1;
1.38      christos 2081:                num_read = read(el->el_infd, cp, 1);
                   2082:                if (fcntl(el->el_infd, F_SETFL, n))
1.96      christos 2083:                        return -1;
1.38      christos 2084: #else
                   2085:                /* not non-blocking, but what you gonna do? */
                   2086:                num_read = read(el->el_infd, cp, 1);
1.96      christos 2087:                return -1;
1.38      christos 2088: #endif
                   2089:
                   2090:                if (num_read < 0 && errno == EAGAIN)
                   2091:                        continue;
                   2092:                if (num_read == 0)
                   2093:                        continue;
                   2094:                break;
                   2095:        }
                   2096:        if (!rl_event_hook)
                   2097:                el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
1.80      christos 2098:        return (int)num_read;
1.1       christos 2099: }
1.49      christos 2100:
                   2101: static void
                   2102: _rl_update_pos(void)
                   2103: {
                   2104:        const LineInfo *li = el_line(e);
                   2105:
1.80      christos 2106:        rl_point = (int)(li->cursor - li->buffer);
                   2107:        rl_end = (int)(li->lastchar - li->buffer);
1.49      christos 2108: }
1.70      christos 2109:
                   2110: void
                   2111: rl_get_screen_size(int *rows, int *cols)
                   2112: {
                   2113:        if (rows)
1.107     christos 2114:                el_get(e, EL_GETTC, "li", rows, (void *)0);
1.70      christos 2115:        if (cols)
1.107     christos 2116:                el_get(e, EL_GETTC, "co", cols, (void *)0);
1.70      christos 2117: }
                   2118:
                   2119: void
                   2120: rl_set_screen_size(int rows, int cols)
                   2121: {
                   2122:        char buf[64];
                   2123:        (void)snprintf(buf, sizeof(buf), "%d", rows);
1.106     christos 2124:        el_set(e, EL_SETTC, "li", buf, NULL);
1.70      christos 2125:        (void)snprintf(buf, sizeof(buf), "%d", cols);
1.106     christos 2126:        el_set(e, EL_SETTC, "co", buf, NULL);
1.70      christos 2127: }
                   2128:
1.71      christos 2129: char **
                   2130: rl_completion_matches(const char *str, rl_compentry_func_t *fun)
                   2131: {
                   2132:        size_t len, max, i, j, min;
                   2133:        char **list, *match, *a, *b;
                   2134:
                   2135:        len = 1;
                   2136:        max = 10;
1.95      christos 2137:        if ((list = el_malloc(max * sizeof(*list))) == NULL)
1.71      christos 2138:                return NULL;
                   2139:
                   2140:        while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
1.83      christos 2141:                list[len++] = match;
1.71      christos 2142:                if (len == max) {
                   2143:                        char **nl;
                   2144:                        max += 10;
1.95      christos 2145:                        if ((nl = el_realloc(list, max * sizeof(*nl))) == NULL)
1.71      christos 2146:                                goto out;
                   2147:                        list = nl;
                   2148:                }
                   2149:        }
                   2150:        if (len == 1)
                   2151:                goto out;
                   2152:        list[len] = NULL;
                   2153:        if (len == 2) {
                   2154:                if ((list[0] = strdup(list[1])) == NULL)
                   2155:                        goto out;
                   2156:                return list;
                   2157:        }
                   2158:        qsort(&list[1], len - 1, sizeof(*list),
                   2159:            (int (*)(const void *, const void *)) strcmp);
                   2160:        min = SIZE_T_MAX;
                   2161:        for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
                   2162:                b = list[i + 1];
                   2163:                for (j = 0; a[j] && a[j] == b[j]; j++)
                   2164:                        continue;
                   2165:                if (min > j)
                   2166:                        min = j;
                   2167:        }
                   2168:        if (min == 0 && *str) {
                   2169:                if ((list[0] = strdup(str)) == NULL)
                   2170:                        goto out;
                   2171:        } else {
1.95      christos 2172:                if ((list[0] = el_malloc((min + 1) * sizeof(*list[0]))) == NULL)
1.71      christos 2173:                        goto out;
                   2174:                (void)memcpy(list[0], list[1], min);
                   2175:                list[0][min] = '\0';
                   2176:        }
                   2177:        return list;
                   2178:
                   2179: out:
1.95      christos 2180:        el_free(list);
1.71      christos 2181:        return NULL;
                   2182: }
                   2183:
1.70      christos 2184: char *
                   2185: rl_filename_completion_function (const char *text, int state)
                   2186: {
                   2187:        return fn_filename_completion_function(text, state);
                   2188: }
                   2189:
1.73      christos 2190: void
                   2191: rl_forced_update_display(void)
                   2192: {
1.74      christos 2193:        el_set(e, EL_REFRESH);
1.73      christos 2194: }
                   2195:
1.70      christos 2196: int
                   2197: _rl_abort_internal(void)
                   2198: {
                   2199:        el_beep(e);
                   2200:        longjmp(topbuf, 1);
                   2201:        /*NOTREACHED*/
                   2202: }
                   2203:
                   2204: int
                   2205: _rl_qsort_string_compare(char **s1, char **s2)
                   2206: {
                   2207:        return strcoll(*s1, *s2);
                   2208: }
                   2209:
1.85      christos 2210: HISTORY_STATE *
                   2211: history_get_history_state(void)
                   2212: {
                   2213:        HISTORY_STATE *hs;
                   2214:
1.95      christos 2215:        if ((hs = el_malloc(sizeof(*hs))) == NULL)
1.96      christos 2216:                return NULL;
1.85      christos 2217:        hs->length = history_length;
1.96      christos 2218:        return hs;
1.85      christos 2219: }
                   2220:
1.70      christos 2221: int
                   2222: /*ARGSUSED*/
1.97      christos 2223: rl_kill_text(int from __attribute__((__unused__)),
                   2224:     int to __attribute__((__unused__)))
1.70      christos 2225: {
                   2226:        return 0;
                   2227: }
                   2228:
                   2229: Keymap
                   2230: rl_make_bare_keymap(void)
                   2231: {
                   2232:        return NULL;
                   2233: }
                   2234:
                   2235: Keymap
                   2236: rl_get_keymap(void)
                   2237: {
                   2238:        return NULL;
                   2239: }
                   2240:
                   2241: void
                   2242: /*ARGSUSED*/
1.97      christos 2243: rl_set_keymap(Keymap k __attribute__((__unused__)))
1.70      christos 2244: {
                   2245: }
                   2246:
                   2247: int
                   2248: /*ARGSUSED*/
1.97      christos 2249: rl_generic_bind(int type __attribute__((__unused__)),
                   2250:     const char * keyseq __attribute__((__unused__)),
                   2251:     const char * data __attribute__((__unused__)),
                   2252:     Keymap k __attribute__((__unused__)))
1.70      christos 2253: {
                   2254:        return 0;
                   2255: }
                   2256:
                   2257: int
                   2258: /*ARGSUSED*/
1.97      christos 2259: rl_bind_key_in_map(int key __attribute__((__unused__)),
                   2260:     rl_command_func_t *fun __attribute__((__unused__)),
                   2261:     Keymap k __attribute__((__unused__)))
1.70      christos 2262: {
                   2263:        return 0;
                   2264: }
1.85      christos 2265:
                   2266: /* unsupported, but needed by python */
                   2267: void
                   2268: rl_cleanup_after_signal(void)
                   2269: {
                   2270: }
1.90      christos 2271:
                   2272: int
                   2273: rl_on_new_line(void)
                   2274: {
                   2275:        return 0;
                   2276: }
1.105     christos 2277:
                   2278: void
                   2279: rl_free_line_state(void)
                   2280: {
                   2281: }

CVSweb <webmaster@jp.NetBSD.org>