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readline.c revision 1.88
      1  1.88  christos /*	$NetBSD: readline.c,v 1.88 2010/01/03 18:27:10 christos Exp $	*/
      2   1.1  christos 
      3   1.1  christos /*-
      4   1.1  christos  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5   1.1  christos  * All rights reserved.
      6   1.1  christos  *
      7   1.1  christos  * This code is derived from software contributed to The NetBSD Foundation
      8   1.1  christos  * by Jaromir Dolecek.
      9   1.1  christos  *
     10   1.1  christos  * Redistribution and use in source and binary forms, with or without
     11   1.1  christos  * modification, are permitted provided that the following conditions
     12   1.1  christos  * are met:
     13   1.1  christos  * 1. Redistributions of source code must retain the above copyright
     14   1.1  christos  *    notice, this list of conditions and the following disclaimer.
     15   1.1  christos  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1  christos  *    notice, this list of conditions and the following disclaimer in the
     17   1.1  christos  *    documentation and/or other materials provided with the distribution.
     18   1.1  christos  *
     19   1.1  christos  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20   1.1  christos  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21   1.1  christos  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22   1.1  christos  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23   1.1  christos  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24   1.1  christos  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25   1.1  christos  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26   1.1  christos  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27   1.1  christos  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28   1.1  christos  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29   1.1  christos  * POSSIBILITY OF SUCH DAMAGE.
     30   1.1  christos  */
     31   1.1  christos 
     32  1.20  christos #include "config.h"
     33   1.1  christos #if !defined(lint) && !defined(SCCSID)
     34  1.88  christos __RCSID("$NetBSD: readline.c,v 1.88 2010/01/03 18:27:10 christos Exp $");
     35   1.1  christos #endif /* not lint && not SCCSID */
     36   1.1  christos 
     37   1.1  christos #include <sys/types.h>
     38   1.1  christos #include <sys/stat.h>
     39   1.1  christos #include <stdio.h>
     40   1.1  christos #include <dirent.h>
     41   1.1  christos #include <string.h>
     42   1.1  christos #include <pwd.h>
     43   1.1  christos #include <ctype.h>
     44   1.1  christos #include <stdlib.h>
     45   1.1  christos #include <unistd.h>
     46   1.1  christos #include <limits.h>
     47  1.38  christos #include <errno.h>
     48  1.38  christos #include <fcntl.h>
     49  1.70  christos #include <setjmp.h>
     50  1.38  christos #ifdef HAVE_VIS_H
     51  1.35  christos #include <vis.h>
     52  1.38  christos #else
     53  1.38  christos #include "np/vis.h"
     54  1.38  christos #endif
     55  1.79    sketch #include "readline/readline.h"
     56  1.45  christos #include "el.h"
     57  1.45  christos #include "fcns.h"		/* for EL_NUM_FCNS */
     58   1.1  christos #include "histedit.h"
     59  1.53       dsl #include "filecomplete.h"
     60   1.1  christos 
     61  1.68  christos void rl_prep_terminal(int);
     62  1.68  christos void rl_deprep_terminal(void);
     63  1.68  christos 
     64   1.1  christos /* for rl_complete() */
     65  1.40  christos #define TAB		'\r'
     66   1.1  christos 
     67   1.1  christos /* see comment at the #ifdef for sense of this */
     68  1.40  christos /* #define GDB_411_HACK */
     69   1.1  christos 
     70   1.1  christos /* readline compatibility stuff - look at readline sources/documentation */
     71   1.1  christos /* to see what these variables mean */
     72  1.11     lukem const char *rl_library_version = "EditLine wrapper";
     73  1.85  christos int rl_readline_version = RL_READLINE_VERSION;
     74  1.20  christos static char empty[] = { '\0' };
     75  1.20  christos static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
     76  1.20  christos static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
     77  1.20  christos     '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
     78  1.20  christos char *rl_readline_name = empty;
     79  1.11     lukem FILE *rl_instream = NULL;
     80  1.11     lukem FILE *rl_outstream = NULL;
     81  1.11     lukem int rl_point = 0;
     82  1.11     lukem int rl_end = 0;
     83  1.11     lukem char *rl_line_buffer = NULL;
     84  1.55       agc VCPFunction *rl_linefunc = NULL;
     85  1.38  christos int rl_done = 0;
     86  1.38  christos VFunction *rl_event_hook = NULL;
     87  1.70  christos KEYMAP_ENTRY_ARRAY emacs_standard_keymap,
     88  1.70  christos     emacs_meta_keymap,
     89  1.70  christos     emacs_ctlx_keymap;
     90  1.11     lukem 
     91  1.11     lukem int history_base = 1;		/* probably never subject to change */
     92  1.11     lukem int history_length = 0;
     93  1.11     lukem int max_input_history = 0;
     94  1.11     lukem char history_expansion_char = '!';
     95  1.11     lukem char history_subst_char = '^';
     96  1.20  christos char *history_no_expand_chars = expand_chars;
     97  1.11     lukem Function *history_inhibit_expansion_function = NULL;
     98  1.40  christos char *history_arg_extract(int start, int end, const char *str);
     99  1.11     lukem 
    100  1.11     lukem int rl_inhibit_completion = 0;
    101  1.11     lukem int rl_attempted_completion_over = 0;
    102  1.20  christos char *rl_basic_word_break_characters = break_chars;
    103  1.11     lukem char *rl_completer_word_break_characters = NULL;
    104  1.11     lukem char *rl_completer_quote_characters = NULL;
    105  1.34  christos Function *rl_completion_entry_function = NULL;
    106  1.11     lukem CPPFunction *rl_attempted_completion_function = NULL;
    107  1.32  christos Function *rl_pre_input_hook = NULL;
    108  1.32  christos Function *rl_startup1_hook = NULL;
    109  1.72  christos int (*rl_getc_function)(FILE *) = NULL;
    110  1.32  christos char *rl_terminal_name = NULL;
    111  1.32  christos int rl_already_prompted = 0;
    112  1.32  christos int rl_filename_completion_desired = 0;
    113  1.32  christos int rl_ignore_completion_duplicates = 0;
    114  1.39  christos int rl_catch_signals = 1;
    115  1.70  christos int readline_echoing_p = 1;
    116  1.70  christos int _rl_print_completions_horizontally = 0;
    117  1.32  christos VFunction *rl_redisplay_function = NULL;
    118  1.33  christos Function *rl_startup_hook = NULL;
    119  1.34  christos VFunction *rl_completion_display_matches_hook = NULL;
    120  1.68  christos VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal;
    121  1.68  christos VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal;
    122  1.85  christos KEYMAP_ENTRY_ARRAY emacs_meta_keymap;
    123   1.1  christos 
    124  1.86  christos #ifdef WIDECHAR
    125  1.86  christos static ct_buffer_t conv;
    126  1.86  christos #endif
    127  1.86  christos 
    128  1.12  jdolecek /*
    129  1.32  christos  * The current prompt string.
    130  1.32  christos  */
    131  1.32  christos char *rl_prompt = NULL;
    132  1.32  christos /*
    133  1.12  jdolecek  * This is set to character indicating type of completion being done by
    134  1.12  jdolecek  * rl_complete_internal(); this is available for application completion
    135  1.12  jdolecek  * functions.
    136  1.12  jdolecek  */
    137  1.12  jdolecek int rl_completion_type = 0;
    138  1.12  jdolecek 
    139  1.12  jdolecek /*
    140  1.12  jdolecek  * If more than this number of items results from query for possible
    141  1.12  jdolecek  * completions, we ask user if they are sure to really display the list.
    142  1.12  jdolecek  */
    143  1.12  jdolecek int rl_completion_query_items = 100;
    144  1.12  jdolecek 
    145  1.12  jdolecek /*
    146  1.15  jdolecek  * List of characters which are word break characters, but should be left
    147  1.15  jdolecek  * in the parsed text when it is passed to the completion function.
    148  1.15  jdolecek  * Shell uses this to help determine what kind of completing to do.
    149  1.12  jdolecek  */
    150  1.53       dsl char *rl_special_prefixes = NULL;
    151  1.15  jdolecek 
    152  1.15  jdolecek /*
    153  1.15  jdolecek  * This is the character appended to the completed words if at the end of
    154  1.15  jdolecek  * the line. Default is ' ' (a space).
    155  1.15  jdolecek  */
    156  1.15  jdolecek int rl_completion_append_character = ' ';
    157  1.15  jdolecek 
    158  1.15  jdolecek /* stuff below is used internally by libedit for readline emulation */
    159  1.15  jdolecek 
    160  1.86  christos static TYPE(History) *h = NULL;
    161   1.1  christos static EditLine *e = NULL;
    162  1.35  christos static Function *map[256];
    163  1.70  christos static jmp_buf topbuf;
    164   1.1  christos 
    165   1.1  christos /* internal functions */
    166  1.11     lukem static unsigned char	 _el_rl_complete(EditLine *, int);
    167  1.46  christos static unsigned char	 _el_rl_tstp(EditLine *, int);
    168  1.11     lukem static char		*_get_prompt(EditLine *);
    169  1.59  christos static int		 _getc_function(EditLine *, char *);
    170  1.11     lukem static HIST_ENTRY	*_move_history(int);
    171  1.40  christos static int		 _history_expand_command(const char *, size_t, size_t,
    172  1.40  christos     char **);
    173  1.11     lukem static char		*_rl_compat_sub(const char *, const char *,
    174  1.40  christos     const char *, int);
    175  1.38  christos static int		 _rl_event_read_char(EditLine *, char *);
    176  1.49  christos static void		 _rl_update_pos(void);
    177   1.1  christos 
    178   1.5  christos 
    179   1.5  christos /* ARGSUSED */
    180   1.1  christos static char *
    181  1.30  christos _get_prompt(EditLine *el __attribute__((__unused__)))
    182   1.1  christos {
    183  1.32  christos 	rl_already_prompted = 1;
    184  1.32  christos 	return (rl_prompt);
    185   1.1  christos }
    186   1.1  christos 
    187  1.11     lukem 
    188   1.1  christos /*
    189   1.1  christos  * generic function for moving around history
    190   1.1  christos  */
    191   1.2  christos static HIST_ENTRY *
    192  1.11     lukem _move_history(int op)
    193   1.1  christos {
    194  1.86  christos 	TYPE(HistEvent) ev;
    195   1.1  christos 	static HIST_ENTRY rl_he;
    196   1.1  christos 
    197  1.86  christos 	if (FUNW(history)(h, &ev, op) != 0)
    198   1.1  christos 		return (HIST_ENTRY *) NULL;
    199   1.1  christos 
    200  1.86  christos 	rl_he.line = ct_encode_string(ev.str, &conv);
    201  1.40  christos 	rl_he.data = NULL;
    202   1.1  christos 
    203  1.11     lukem 	return (&rl_he);
    204   1.1  christos }
    205   1.1  christos 
    206   1.1  christos 
    207   1.7    simonb /*
    208  1.59  christos  * read one key from user defined input function
    209  1.59  christos  */
    210  1.59  christos static int
    211  1.61  christos /*ARGSUSED*/
    212  1.59  christos _getc_function(EditLine *el, char *c)
    213  1.59  christos {
    214  1.59  christos 	int i;
    215  1.59  christos 
    216  1.72  christos 	i = (*rl_getc_function)(NULL);
    217  1.59  christos 	if (i == -1)
    218  1.59  christos 		return 0;
    219  1.59  christos 	*c = i;
    220  1.59  christos 	return 1;
    221  1.59  christos }
    222  1.59  christos 
    223  1.85  christos static const char _dothistory[] = "/.history";
    224  1.85  christos 
    225  1.85  christos static const char *
    226  1.85  christos _default_history_file(void)
    227  1.85  christos {
    228  1.85  christos 	struct passwd *p;
    229  1.85  christos 	static char path[PATH_MAX];
    230  1.85  christos 
    231  1.85  christos 	if (*path)
    232  1.85  christos 		return path;
    233  1.85  christos 	if ((p = getpwuid(getuid())) == NULL)
    234  1.85  christos 		return NULL;
    235  1.85  christos 	strlcpy(path, p->pw_dir, PATH_MAX);
    236  1.85  christos 	strlcat(path, _dothistory, PATH_MAX);
    237  1.85  christos 	return path;
    238  1.85  christos }
    239  1.59  christos 
    240  1.59  christos /*
    241   1.7    simonb  * READLINE compatibility stuff
    242   1.1  christos  */
    243   1.1  christos 
    244   1.1  christos /*
    245  1.78  christos  * Set the prompt
    246  1.78  christos  */
    247  1.78  christos int
    248  1.78  christos rl_set_prompt(const char *prompt)
    249  1.78  christos {
    250  1.82  christos 	char *p;
    251  1.82  christos 
    252  1.78  christos 	if (!prompt)
    253  1.78  christos 		prompt = "";
    254  1.78  christos 	if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0)
    255  1.78  christos 		return 0;
    256  1.78  christos 	if (rl_prompt)
    257  1.78  christos 		free(rl_prompt);
    258  1.78  christos 	rl_prompt = strdup(prompt);
    259  1.82  christos 	if (rl_prompt == NULL)
    260  1.82  christos 		return -1;
    261  1.82  christos 
    262  1.82  christos 	while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL)
    263  1.82  christos 		*p = RL_PROMPT_START_IGNORE;
    264  1.82  christos 
    265  1.82  christos 	return 0;
    266  1.78  christos }
    267  1.78  christos 
    268  1.78  christos /*
    269   1.1  christos  * initialize rl compat stuff
    270   1.1  christos  */
    271   1.1  christos int
    272  1.11     lukem rl_initialize(void)
    273   1.1  christos {
    274  1.86  christos 	TYPE(HistEvent) ev;
    275   1.1  christos 	const LineInfo *li;
    276  1.18  christos 	int editmode = 1;
    277  1.18  christos 	struct termios t;
    278   1.1  christos 
    279   1.1  christos 	if (e != NULL)
    280   1.1  christos 		el_end(e);
    281   1.1  christos 	if (h != NULL)
    282  1.87  christos 		FUN(history,end)(h);
    283   1.1  christos 
    284   1.1  christos 	if (!rl_instream)
    285   1.1  christos 		rl_instream = stdin;
    286   1.1  christos 	if (!rl_outstream)
    287   1.1  christos 		rl_outstream = stdout;
    288  1.18  christos 
    289  1.18  christos 	/*
    290  1.18  christos 	 * See if we don't really want to run the editor
    291  1.18  christos 	 */
    292  1.18  christos 	if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
    293  1.18  christos 		editmode = 0;
    294  1.18  christos 
    295   1.4  christos 	e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
    296  1.18  christos 
    297  1.18  christos 	if (!editmode)
    298  1.87  christos 		FUN(el,set)(e, EL_EDITMODE, 0);
    299   1.1  christos 
    300  1.87  christos 	h = FUN(history,init)();
    301   1.1  christos 	if (!e || !h)
    302  1.11     lukem 		return (-1);
    303   1.1  christos 
    304  1.86  christos 	FUNW(history)(h, &ev, H_SETSIZE, INT_MAX);	/* unlimited */
    305   1.1  christos 	history_length = 0;
    306   1.1  christos 	max_input_history = INT_MAX;
    307   1.1  christos 	el_set(e, EL_HIST, history, h);
    308   1.1  christos 
    309  1.59  christos 	/* setup getc function if valid */
    310  1.59  christos 	if (rl_getc_function)
    311  1.59  christos 		el_set(e, EL_GETCFN, _getc_function);
    312  1.59  christos 
    313   1.1  christos 	/* for proper prompt printing in readline() */
    314  1.78  christos 	if (rl_set_prompt("") == -1) {
    315  1.87  christos 		FUN(history,end)(h);
    316  1.23  christos 		el_end(e);
    317  1.23  christos 		return -1;
    318  1.23  christos 	}
    319  1.82  christos 	el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE);
    320  1.39  christos 	el_set(e, EL_SIGNAL, rl_catch_signals);
    321   1.1  christos 
    322   1.1  christos 	/* set default mode to "emacs"-style and read setting afterwards */
    323   1.1  christos 	/* so this can be overriden */
    324   1.1  christos 	el_set(e, EL_EDITOR, "emacs");
    325  1.32  christos 	if (rl_terminal_name != NULL)
    326  1.32  christos 		el_set(e, EL_TERMINAL, rl_terminal_name);
    327  1.32  christos 	else
    328  1.32  christos 		el_get(e, EL_TERMINAL, &rl_terminal_name);
    329   1.1  christos 
    330  1.12  jdolecek 	/*
    331  1.35  christos 	 * Word completion - this has to go AFTER rebinding keys
    332  1.12  jdolecek 	 * to emacs-style.
    333  1.12  jdolecek 	 */
    334   1.1  christos 	el_set(e, EL_ADDFN, "rl_complete",
    335  1.35  christos 	    "ReadLine compatible completion function",
    336  1.11     lukem 	    _el_rl_complete);
    337   1.1  christos 	el_set(e, EL_BIND, "^I", "rl_complete", NULL);
    338  1.46  christos 
    339  1.46  christos 	/*
    340  1.46  christos 	 * Send TSTP when ^Z is pressed.
    341  1.46  christos 	 */
    342  1.46  christos 	el_set(e, EL_ADDFN, "rl_tstp",
    343  1.46  christos 	    "ReadLine compatible suspend function",
    344  1.46  christos 	    _el_rl_tstp);
    345  1.46  christos 	el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
    346  1.12  jdolecek 
    347   1.1  christos 	/* read settings from configuration file */
    348   1.1  christos 	el_source(e, NULL);
    349   1.1  christos 
    350  1.12  jdolecek 	/*
    351  1.12  jdolecek 	 * Unfortunately, some applications really do use rl_point
    352  1.12  jdolecek 	 * and rl_line_buffer directly.
    353  1.12  jdolecek 	 */
    354   1.1  christos 	li = el_line(e);
    355  1.20  christos 	/* a cheesy way to get rid of const cast. */
    356  1.20  christos 	rl_line_buffer = memchr(li->buffer, *li->buffer, 1);
    357  1.49  christos 	_rl_update_pos();
    358   1.1  christos 
    359  1.32  christos 	if (rl_startup_hook)
    360  1.32  christos 		(*rl_startup_hook)(NULL, 0);
    361  1.32  christos 
    362  1.11     lukem 	return (0);
    363   1.1  christos }
    364   1.1  christos 
    365  1.11     lukem 
    366   1.1  christos /*
    367   1.1  christos  * read one line from input stream and return it, chomping
    368   1.1  christos  * trailing newline (if there is any)
    369   1.1  christos  */
    370   1.1  christos char *
    371  1.70  christos readline(const char *p)
    372   1.1  christos {
    373  1.86  christos 	TYPE(HistEvent) ev;
    374  1.70  christos 	const char * volatile prompt = p;
    375   1.3   thorpej 	int count;
    376   1.1  christos 	const char *ret;
    377  1.20  christos 	char *buf;
    378  1.38  christos 	static int used_event_hook;
    379   1.1  christos 
    380   1.1  christos 	if (e == NULL || h == NULL)
    381   1.1  christos 		rl_initialize();
    382   1.1  christos 
    383  1.38  christos 	rl_done = 0;
    384  1.38  christos 
    385  1.70  christos 	(void)setjmp(topbuf);
    386  1.70  christos 
    387   1.9  jdolecek 	/* update prompt accordingly to what has been passed */
    388  1.78  christos 	if (rl_set_prompt(prompt) == -1)
    389  1.78  christos 		return NULL;
    390  1.32  christos 
    391  1.32  christos 	if (rl_pre_input_hook)
    392  1.32  christos 		(*rl_pre_input_hook)(NULL, 0);
    393  1.32  christos 
    394  1.38  christos 	if (rl_event_hook && !(e->el_flags&NO_TTY)) {
    395  1.38  christos 		el_set(e, EL_GETCFN, _rl_event_read_char);
    396  1.38  christos 		used_event_hook = 1;
    397  1.38  christos 	}
    398  1.38  christos 
    399  1.38  christos 	if (!rl_event_hook && used_event_hook) {
    400  1.38  christos 		el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
    401  1.38  christos 		used_event_hook = 0;
    402  1.38  christos 	}
    403  1.38  christos 
    404  1.32  christos 	rl_already_prompted = 0;
    405  1.32  christos 
    406   1.1  christos 	/* get one line from input stream */
    407   1.1  christos 	ret = el_gets(e, &count);
    408   1.1  christos 
    409   1.1  christos 	if (ret && count > 0) {
    410   1.5  christos 		int lastidx;
    411   1.1  christos 
    412  1.20  christos 		buf = strdup(ret);
    413  1.23  christos 		if (buf == NULL)
    414  1.23  christos 			return NULL;
    415   1.1  christos 		lastidx = count - 1;
    416  1.20  christos 		if (buf[lastidx] == '\n')
    417  1.20  christos 			buf[lastidx] = '\0';
    418   1.1  christos 	} else
    419  1.20  christos 		buf = NULL;
    420   1.1  christos 
    421  1.86  christos 	FUNW(history)(h, &ev, H_GETSIZE);
    422   1.1  christos 	history_length = ev.num;
    423   1.1  christos 
    424  1.20  christos 	return buf;
    425   1.1  christos }
    426   1.1  christos 
    427   1.1  christos /*
    428   1.1  christos  * history functions
    429   1.1  christos  */
    430   1.1  christos 
    431   1.1  christos /*
    432   1.1  christos  * is normally called before application starts to use
    433   1.1  christos  * history expansion functions
    434   1.1  christos  */
    435   1.1  christos void
    436  1.11     lukem using_history(void)
    437   1.1  christos {
    438   1.1  christos 	if (h == NULL || e == NULL)
    439   1.1  christos 		rl_initialize();
    440   1.1  christos }
    441   1.1  christos 
    442  1.11     lukem 
    443   1.1  christos /*
    444   1.1  christos  * substitute ``what'' with ``with'', returning resulting string; if
    445  1.29       wiz  * globally == 1, substitutes all occurrences of what, otherwise only the
    446   1.1  christos  * first one
    447   1.1  christos  */
    448  1.11     lukem static char *
    449  1.11     lukem _rl_compat_sub(const char *str, const char *what, const char *with,
    450  1.11     lukem     int globally)
    451  1.11     lukem {
    452  1.40  christos 	const	char	*s;
    453  1.40  christos 	char	*r, *result;
    454  1.40  christos 	size_t	len, with_len, what_len;
    455   1.1  christos 
    456  1.40  christos 	len = strlen(str);
    457  1.40  christos 	with_len = strlen(with);
    458  1.40  christos 	what_len = strlen(what);
    459  1.40  christos 
    460  1.40  christos 	/* calculate length we need for result */
    461  1.40  christos 	s = str;
    462  1.40  christos 	while (*s) {
    463  1.40  christos 		if (*s == *what && !strncmp(s, what, what_len)) {
    464  1.40  christos 			len += with_len - what_len;
    465  1.40  christos 			if (!globally)
    466  1.40  christos 				break;
    467  1.40  christos 			s += what_len;
    468  1.40  christos 		} else
    469  1.40  christos 			s++;
    470  1.40  christos 	}
    471  1.40  christos 	r = result = malloc(len + 1);
    472  1.23  christos 	if (result == NULL)
    473  1.23  christos 		return NULL;
    474  1.40  christos 	s = str;
    475  1.40  christos 	while (*s) {
    476  1.40  christos 		if (*s == *what && !strncmp(s, what, what_len)) {
    477  1.40  christos 			(void)strncpy(r, with, with_len);
    478  1.40  christos 			r += with_len;
    479  1.40  christos 			s += what_len;
    480  1.40  christos 			if (!globally) {
    481  1.40  christos 				(void)strcpy(r, s);
    482  1.40  christos 				return(result);
    483   1.1  christos 			}
    484  1.40  christos 		} else
    485  1.40  christos 			*r++ = *s++;
    486  1.40  christos 	}
    487  1.76  christos 	*r = '\0';
    488  1.40  christos 	return(result);
    489  1.40  christos }
    490  1.40  christos 
    491  1.40  christos static	char	*last_search_pat;	/* last !?pat[?] search pattern */
    492  1.40  christos static	char	*last_search_match;	/* last !?pat[?] that matched */
    493  1.40  christos 
    494  1.40  christos const char *
    495  1.40  christos get_history_event(const char *cmd, int *cindex, int qchar)
    496  1.40  christos {
    497  1.40  christos 	int idx, sign, sub, num, begin, ret;
    498  1.40  christos 	size_t len;
    499  1.40  christos 	char	*pat;
    500  1.40  christos 	const char *rptr;
    501  1.86  christos 	TYPE(HistEvent) ev;
    502  1.40  christos 
    503  1.40  christos 	idx = *cindex;
    504  1.40  christos 	if (cmd[idx++] != history_expansion_char)
    505  1.40  christos 		return(NULL);
    506  1.40  christos 
    507  1.40  christos 	/* find out which event to take */
    508  1.76  christos 	if (cmd[idx] == history_expansion_char || cmd[idx] == '\0') {
    509  1.86  christos 		if (FUNW(history)(h, &ev, H_FIRST) != 0)
    510  1.40  christos 			return(NULL);
    511  1.40  christos 		*cindex = cmd[idx]? (idx + 1):idx;
    512  1.86  christos 		return ct_encode_string(ev.str, &conv);
    513  1.40  christos 	}
    514  1.40  christos 	sign = 0;
    515  1.40  christos 	if (cmd[idx] == '-') {
    516  1.40  christos 		sign = 1;
    517  1.40  christos 		idx++;
    518  1.40  christos 	}
    519  1.40  christos 
    520  1.40  christos 	if ('0' <= cmd[idx] && cmd[idx] <= '9') {
    521  1.40  christos 		HIST_ENTRY *rl_he;
    522  1.40  christos 
    523  1.40  christos 		num = 0;
    524  1.40  christos 		while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
    525  1.40  christos 			num = num * 10 + cmd[idx] - '0';
    526  1.40  christos 			idx++;
    527  1.40  christos 		}
    528  1.40  christos 		if (sign)
    529  1.40  christos 			num = history_length - num + 1;
    530  1.40  christos 
    531  1.40  christos 		if (!(rl_he = history_get(num)))
    532  1.40  christos 			return(NULL);
    533  1.40  christos 
    534  1.40  christos 		*cindex = idx;
    535  1.40  christos 		return(rl_he->line);
    536  1.40  christos 	}
    537  1.40  christos 	sub = 0;
    538  1.40  christos 	if (cmd[idx] == '?') {
    539  1.40  christos 		sub = 1;
    540  1.40  christos 		idx++;
    541  1.40  christos 	}
    542  1.40  christos 	begin = idx;
    543  1.40  christos 	while (cmd[idx]) {
    544  1.40  christos 		if (cmd[idx] == '\n')
    545  1.40  christos 			break;
    546  1.40  christos 		if (sub && cmd[idx] == '?')
    547  1.40  christos 			break;
    548  1.40  christos 		if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
    549  1.40  christos 				    || cmd[idx] == '\t' || cmd[idx] == qchar))
    550  1.40  christos 			break;
    551  1.40  christos 		idx++;
    552  1.40  christos 	}
    553  1.40  christos 	len = idx - begin;
    554  1.40  christos 	if (sub && cmd[idx] == '?')
    555  1.40  christos 		idx++;
    556  1.40  christos 	if (sub && len == 0 && last_search_pat && *last_search_pat)
    557  1.40  christos 		pat = last_search_pat;
    558  1.40  christos 	else if (len == 0)
    559  1.40  christos 		return(NULL);
    560  1.40  christos 	else {
    561  1.40  christos 		if ((pat = malloc(len + 1)) == NULL)
    562  1.40  christos 			return NULL;
    563  1.40  christos 		(void)strncpy(pat, cmd + begin, len);
    564  1.40  christos 		pat[len] = '\0';
    565  1.40  christos 	}
    566  1.40  christos 
    567  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0) {
    568  1.40  christos 		if (pat != last_search_pat)
    569  1.40  christos 			free(pat);
    570  1.40  christos 		return (NULL);
    571  1.40  christos 	}
    572  1.40  christos 	num = ev.num;
    573  1.40  christos 
    574  1.40  christos 	if (sub) {
    575  1.40  christos 		if (pat != last_search_pat) {
    576  1.40  christos 			if (last_search_pat)
    577  1.40  christos 				free(last_search_pat);
    578  1.40  christos 			last_search_pat = pat;
    579   1.1  christos 		}
    580  1.40  christos 		ret = history_search(pat, -1);
    581  1.40  christos 	} else
    582  1.40  christos 		ret = history_search_prefix(pat, -1);
    583  1.40  christos 
    584  1.40  christos 	if (ret == -1) {
    585  1.40  christos 		/* restore to end of list on failed search */
    586  1.86  christos 		FUNW(history)(h, &ev, H_FIRST);
    587  1.40  christos 		(void)fprintf(rl_outstream, "%s: Event not found\n", pat);
    588  1.40  christos 		if (pat != last_search_pat)
    589  1.40  christos 			free(pat);
    590  1.40  christos 		return(NULL);
    591  1.40  christos 	}
    592  1.40  christos 
    593  1.40  christos 	if (sub && len) {
    594  1.40  christos 		if (last_search_match && last_search_match != pat)
    595  1.40  christos 			free(last_search_match);
    596  1.40  christos 		last_search_match = pat;
    597  1.40  christos 	}
    598  1.40  christos 
    599  1.40  christos 	if (pat != last_search_pat)
    600  1.40  christos 		free(pat);
    601  1.40  christos 
    602  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
    603  1.40  christos 		return(NULL);
    604  1.40  christos 	*cindex = idx;
    605  1.86  christos 	rptr = ct_encode_string(ev.str, &conv);
    606  1.40  christos 
    607  1.40  christos 	/* roll back to original position */
    608  1.86  christos 	(void)FUNW(history)(h, &ev, H_SET, num);
    609   1.1  christos 
    610  1.40  christos 	return rptr;
    611   1.1  christos }
    612   1.1  christos 
    613   1.1  christos /*
    614   1.1  christos  * the real function doing history expansion - takes as argument command
    615   1.1  christos  * to do and data upon which the command should be executed
    616   1.1  christos  * does expansion the way I've understood readline documentation
    617   1.1  christos  *
    618   1.1  christos  * returns 0 if data was not modified, 1 if it was and 2 if the string
    619   1.1  christos  * should be only printed and not executed; in case of error,
    620   1.1  christos  * returns -1 and *result points to NULL
    621   1.1  christos  * it's callers responsibility to free() string returned in *result
    622   1.1  christos  */
    623   1.1  christos static int
    624  1.40  christos _history_expand_command(const char *command, size_t offs, size_t cmdlen,
    625  1.40  christos     char **result)
    626  1.11     lukem {
    627  1.40  christos 	char *tmp, *search = NULL, *aptr;
    628  1.40  christos 	const char *ptr, *cmd;
    629  1.11     lukem 	static char *from = NULL, *to = NULL;
    630  1.40  christos 	int start, end, idx, has_mods = 0;
    631  1.40  christos 	int p_on = 0, g_on = 0;
    632   1.1  christos 
    633   1.1  christos 	*result = NULL;
    634  1.40  christos 	aptr = NULL;
    635  1.41  christos 	ptr = NULL;
    636   1.1  christos 
    637  1.40  christos 	/* First get event specifier */
    638  1.40  christos 	idx = 0;
    639   1.1  christos 
    640  1.40  christos 	if (strchr(":^*$", command[offs + 1])) {
    641  1.40  christos 		char str[4];
    642  1.40  christos 		/*
    643  1.40  christos 		* "!:" is shorthand for "!!:".
    644  1.40  christos 		* "!^", "!*" and "!$" are shorthand for
    645  1.40  christos 		* "!!:^", "!!:*" and "!!:$" respectively.
    646  1.40  christos 		*/
    647  1.40  christos 		str[0] = str[1] = '!';
    648  1.40  christos 		str[2] = '0';
    649  1.40  christos 		ptr = get_history_event(str, &idx, 0);
    650  1.40  christos 		idx = (command[offs + 1] == ':')? 1:0;
    651  1.40  christos 		has_mods = 1;
    652   1.1  christos 	} else {
    653  1.40  christos 		if (command[offs + 1] == '#') {
    654  1.40  christos 			/* use command so far */
    655  1.40  christos 			if ((aptr = malloc(offs + 1)) == NULL)
    656  1.40  christos 				return -1;
    657  1.40  christos 			(void)strncpy(aptr, command, offs);
    658  1.40  christos 			aptr[offs] = '\0';
    659  1.40  christos 			idx = 1;
    660   1.1  christos 		} else {
    661  1.40  christos 			int	qchar;
    662  1.40  christos 
    663  1.40  christos 			qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
    664  1.40  christos 			ptr = get_history_event(command + offs, &idx, qchar);
    665  1.40  christos 		}
    666  1.40  christos 		has_mods = command[offs + idx] == ':';
    667  1.40  christos 	}
    668   1.1  christos 
    669  1.40  christos 	if (ptr == NULL && aptr == NULL)
    670  1.40  christos 		return(-1);
    671   1.1  christos 
    672  1.40  christos 	if (!has_mods) {
    673  1.85  christos 		*result = strdup(aptr ? aptr : ptr);
    674  1.40  christos 		if (aptr)
    675  1.40  christos 			free(aptr);
    676  1.85  christos 		if (*result == NULL)
    677  1.85  christos 			return -1;
    678  1.40  christos 		return(1);
    679  1.40  christos 	}
    680  1.40  christos 
    681  1.40  christos 	cmd = command + offs + idx + 1;
    682  1.40  christos 
    683  1.40  christos 	/* Now parse any word designators */
    684  1.40  christos 
    685  1.40  christos 	if (*cmd == '%')	/* last word matched by ?pat? */
    686  1.40  christos 		tmp = strdup(last_search_match? last_search_match:"");
    687  1.40  christos 	else if (strchr("^*$-0123456789", *cmd)) {
    688  1.40  christos 		start = end = -1;
    689  1.40  christos 		if (*cmd == '^')
    690  1.40  christos 			start = end = 1, cmd++;
    691  1.40  christos 		else if (*cmd == '$')
    692  1.40  christos 			start = -1, cmd++;
    693  1.40  christos 		else if (*cmd == '*')
    694  1.40  christos 			start = 1, cmd++;
    695  1.40  christos 	       else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
    696  1.40  christos 			start = 0;
    697  1.40  christos 			while (*cmd && '0' <= *cmd && *cmd <= '9')
    698  1.40  christos 				start = start * 10 + *cmd++ - '0';
    699  1.40  christos 
    700  1.40  christos 			if (*cmd == '-') {
    701  1.40  christos 				if (isdigit((unsigned char) cmd[1])) {
    702  1.40  christos 					cmd++;
    703  1.40  christos 					end = 0;
    704  1.40  christos 					while (*cmd && '0' <= *cmd && *cmd <= '9')
    705  1.40  christos 						end = end * 10 + *cmd++ - '0';
    706  1.40  christos 				} else if (cmd[1] == '$') {
    707  1.40  christos 					cmd += 2;
    708  1.40  christos 					end = -1;
    709  1.40  christos 				} else {
    710  1.40  christos 					cmd++;
    711  1.40  christos 					end = -2;
    712  1.40  christos 				}
    713  1.40  christos 			} else if (*cmd == '*')
    714  1.40  christos 				end = -1, cmd++;
    715   1.1  christos 			else
    716  1.40  christos 				end = start;
    717  1.40  christos 		}
    718  1.40  christos 		tmp = history_arg_extract(start, end, aptr? aptr:ptr);
    719  1.40  christos 		if (tmp == NULL) {
    720  1.40  christos 			(void)fprintf(rl_outstream, "%s: Bad word specifier",
    721  1.40  christos 			    command + offs + idx);
    722  1.40  christos 			if (aptr)
    723  1.40  christos 				free(aptr);
    724  1.40  christos 			return(-1);
    725  1.40  christos 		}
    726  1.40  christos 	} else
    727  1.40  christos 		tmp = strdup(aptr? aptr:ptr);
    728   1.1  christos 
    729  1.40  christos 	if (aptr)
    730  1.40  christos 		free(aptr);
    731   1.1  christos 
    732  1.77     lukem 	if (*cmd == '\0' || ((size_t)(cmd - (command + offs)) >= cmdlen)) {
    733  1.40  christos 		*result = tmp;
    734  1.40  christos 		return(1);
    735   1.1  christos 	}
    736   1.1  christos 
    737   1.1  christos 	for (; *cmd; cmd++) {
    738   1.1  christos 		if (*cmd == ':')
    739   1.1  christos 			continue;
    740  1.40  christos 		else if (*cmd == 'h') {		/* remove trailing path */
    741  1.40  christos 			if ((aptr = strrchr(tmp, '/')) != NULL)
    742  1.76  christos 				*aptr = '\0';
    743  1.40  christos 		} else if (*cmd == 't') {	/* remove leading path */
    744  1.40  christos 			if ((aptr = strrchr(tmp, '/')) != NULL) {
    745  1.40  christos 				aptr = strdup(aptr + 1);
    746  1.40  christos 				free(tmp);
    747  1.40  christos 				tmp = aptr;
    748  1.40  christos 			}
    749  1.40  christos 		} else if (*cmd == 'r') {	/* remove trailing suffix */
    750  1.40  christos 			if ((aptr = strrchr(tmp, '.')) != NULL)
    751  1.76  christos 				*aptr = '\0';
    752  1.40  christos 		} else if (*cmd == 'e') {	/* remove all but suffix */
    753  1.40  christos 			if ((aptr = strrchr(tmp, '.')) != NULL) {
    754  1.40  christos 				aptr = strdup(aptr);
    755  1.40  christos 				free(tmp);
    756  1.40  christos 				tmp = aptr;
    757  1.40  christos 			}
    758  1.40  christos 		} else if (*cmd == 'p')		/* print only */
    759  1.40  christos 			p_on = 1;
    760   1.1  christos 		else if (*cmd == 'g')
    761   1.1  christos 			g_on = 2;
    762   1.1  christos 		else if (*cmd == 's' || *cmd == '&') {
    763  1.11     lukem 			char *what, *with, delim;
    764  1.30  christos 			size_t len, from_len;
    765   1.5  christos 			size_t size;
    766   1.1  christos 
    767   1.1  christos 			if (*cmd == '&' && (from == NULL || to == NULL))
    768   1.1  christos 				continue;
    769   1.1  christos 			else if (*cmd == 's') {
    770   1.1  christos 				delim = *(++cmd), cmd++;
    771   1.1  christos 				size = 16;
    772   1.5  christos 				what = realloc(from, size);
    773  1.23  christos 				if (what == NULL) {
    774  1.23  christos 					free(from);
    775  1.62  christos 					free(tmp);
    776  1.28  christos 					return 0;
    777  1.23  christos 				}
    778   1.1  christos 				len = 0;
    779   1.1  christos 				for (; *cmd && *cmd != delim; cmd++) {
    780  1.40  christos 					if (*cmd == '\\' && cmd[1] == delim)
    781   1.1  christos 						cmd++;
    782  1.23  christos 					if (len >= size) {
    783  1.23  christos 						char *nwhat;
    784  1.23  christos 						nwhat = realloc(what,
    785  1.40  christos 								(size <<= 1));
    786  1.23  christos 						if (nwhat == NULL) {
    787  1.23  christos 							free(what);
    788  1.62  christos 							free(tmp);
    789  1.28  christos 							return 0;
    790  1.23  christos 						}
    791  1.23  christos 						what = nwhat;
    792  1.23  christos 					}
    793   1.1  christos 					what[len++] = *cmd;
    794   1.1  christos 				}
    795   1.1  christos 				what[len] = '\0';
    796   1.1  christos 				from = what;
    797   1.1  christos 				if (*what == '\0') {
    798   1.1  christos 					free(what);
    799  1.23  christos 					if (search) {
    800   1.1  christos 						from = strdup(search);
    801  1.62  christos 						if (from == NULL) {
    802  1.62  christos 							free(tmp);
    803  1.28  christos 							return 0;
    804  1.62  christos 						}
    805  1.23  christos 					} else {
    806   1.1  christos 						from = NULL;
    807  1.62  christos 						free(tmp);
    808  1.11     lukem 						return (-1);
    809   1.1  christos 					}
    810   1.1  christos 				}
    811   1.1  christos 				cmd++;	/* shift after delim */
    812   1.1  christos 				if (!*cmd)
    813   1.1  christos 					continue;
    814   1.1  christos 
    815   1.1  christos 				size = 16;
    816   1.5  christos 				with = realloc(to, size);
    817  1.23  christos 				if (with == NULL) {
    818  1.23  christos 					free(to);
    819  1.62  christos 					free(tmp);
    820  1.23  christos 					return -1;
    821  1.23  christos 				}
    822   1.1  christos 				len = 0;
    823   1.1  christos 				from_len = strlen(from);
    824   1.1  christos 				for (; *cmd && *cmd != delim; cmd++) {
    825   1.1  christos 					if (len + from_len + 1 >= size) {
    826  1.23  christos 						char *nwith;
    827   1.1  christos 						size += from_len + 1;
    828  1.23  christos 						nwith = realloc(with, size);
    829  1.23  christos 						if (nwith == NULL) {
    830  1.23  christos 							free(with);
    831  1.62  christos 							free(tmp);
    832  1.23  christos 							return -1;
    833  1.23  christos 						}
    834  1.23  christos 						with = nwith;
    835   1.1  christos 					}
    836   1.1  christos 					if (*cmd == '&') {
    837   1.1  christos 						/* safe */
    838  1.40  christos 						(void)strcpy(&with[len], from);
    839   1.1  christos 						len += from_len;
    840   1.1  christos 						continue;
    841   1.1  christos 					}
    842   1.1  christos 					if (*cmd == '\\'
    843   1.1  christos 					    && (*(cmd + 1) == delim
    844   1.1  christos 						|| *(cmd + 1) == '&'))
    845   1.1  christos 						cmd++;
    846   1.1  christos 					with[len++] = *cmd;
    847   1.1  christos 				}
    848   1.1  christos 				with[len] = '\0';
    849   1.1  christos 				to = with;
    850   1.1  christos 			}
    851   1.1  christos 
    852  1.40  christos 			aptr = _rl_compat_sub(tmp, from, to, g_on);
    853  1.40  christos 			if (aptr) {
    854  1.40  christos 				free(tmp);
    855  1.40  christos 				tmp = aptr;
    856  1.23  christos 			}
    857  1.40  christos 			g_on = 0;
    858   1.1  christos 		}
    859   1.5  christos 	}
    860  1.40  christos 	*result = tmp;
    861  1.40  christos 	return (p_on? 2:1);
    862   1.1  christos }
    863   1.1  christos 
    864  1.11     lukem 
    865   1.1  christos /*
    866   1.1  christos  * csh-style history expansion
    867   1.1  christos  */
    868   1.1  christos int
    869  1.11     lukem history_expand(char *str, char **output)
    870  1.11     lukem {
    871  1.40  christos 	int ret = 0;
    872  1.40  christos 	size_t idx, i, size;
    873  1.40  christos 	char *tmp, *result;
    874   1.1  christos 
    875   1.1  christos 	if (h == NULL || e == NULL)
    876   1.1  christos 		rl_initialize();
    877   1.1  christos 
    878  1.40  christos 	if (history_expansion_char == 0) {
    879  1.40  christos 		*output = strdup(str);
    880  1.40  christos 		return(0);
    881  1.40  christos 	}
    882   1.1  christos 
    883  1.40  christos 	*output = NULL;
    884   1.1  christos 	if (str[0] == history_subst_char) {
    885   1.1  christos 		/* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
    886  1.40  christos 		*output = malloc(strlen(str) + 4 + 1);
    887  1.40  christos 		if (*output == NULL)
    888  1.40  christos 			return 0;
    889  1.40  christos 		(*output)[0] = (*output)[1] = history_expansion_char;
    890  1.40  christos 		(*output)[2] = ':';
    891  1.40  christos 		(*output)[3] = 's';
    892  1.40  christos 		(void)strcpy((*output) + 4, str);
    893  1.40  christos 		str = *output;
    894  1.40  christos 	} else {
    895  1.40  christos 		*output = strdup(str);
    896  1.40  christos 		if (*output == NULL)
    897  1.40  christos 			return 0;
    898   1.1  christos 	}
    899  1.40  christos 
    900  1.63  christos #define ADD_STRING(what, len, fr)					\
    901   1.1  christos 	{								\
    902  1.23  christos 		if (idx + len + 1 > size) {				\
    903  1.23  christos 			char *nresult = realloc(result, (size += len + 1));\
    904  1.23  christos 			if (nresult == NULL) {				\
    905  1.23  christos 				free(*output);				\
    906  1.65  christos 				if (/*CONSTCOND*/fr)			\
    907  1.63  christos 					free(tmp);			\
    908  1.28  christos 				return 0;				\
    909  1.23  christos 			}						\
    910  1.23  christos 			result = nresult;				\
    911  1.23  christos 		}							\
    912   1.1  christos 		(void)strncpy(&result[idx], what, len);			\
    913   1.1  christos 		idx += len;						\
    914   1.1  christos 		result[idx] = '\0';					\
    915   1.1  christos 	}
    916   1.1  christos 
    917   1.1  christos 	result = NULL;
    918   1.1  christos 	size = idx = 0;
    919  1.64  christos 	tmp = NULL;
    920   1.1  christos 	for (i = 0; str[i];) {
    921  1.40  christos 		int qchar, loop_again;
    922  1.40  christos 		size_t len, start, j;
    923   1.1  christos 
    924  1.40  christos 		qchar = 0;
    925   1.1  christos 		loop_again = 1;
    926   1.1  christos 		start = j = i;
    927   1.1  christos loop:
    928   1.1  christos 		for (; str[j]; j++) {
    929   1.1  christos 			if (str[j] == '\\' &&
    930   1.1  christos 			    str[j + 1] == history_expansion_char) {
    931  1.40  christos 				(void)strcpy(&str[j], &str[j + 1]);
    932   1.1  christos 				continue;
    933   1.1  christos 			}
    934   1.1  christos 			if (!loop_again) {
    935  1.40  christos 				if (isspace((unsigned char) str[j])
    936  1.40  christos 				    || str[j] == qchar)
    937   1.1  christos 					break;
    938   1.1  christos 			}
    939   1.1  christos 			if (str[j] == history_expansion_char
    940   1.1  christos 			    && !strchr(history_no_expand_chars, str[j + 1])
    941   1.1  christos 			    && (!history_inhibit_expansion_function ||
    942  1.40  christos 			    (*history_inhibit_expansion_function)(str,
    943  1.40  christos 			    (int)j) == 0))
    944   1.1  christos 				break;
    945   1.1  christos 		}
    946   1.1  christos 
    947  1.40  christos 		if (str[j] && loop_again) {
    948   1.1  christos 			i = j;
    949  1.40  christos 			qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
    950   1.1  christos 			j++;
    951   1.1  christos 			if (str[j] == history_expansion_char)
    952   1.1  christos 				j++;
    953   1.1  christos 			loop_again = 0;
    954   1.1  christos 			goto loop;
    955   1.1  christos 		}
    956   1.1  christos 		len = i - start;
    957  1.64  christos 		ADD_STRING(&str[start], len, 0);
    958   1.1  christos 
    959  1.40  christos 		if (str[i] == '\0' || str[i] != history_expansion_char) {
    960   1.1  christos 			len = j - i;
    961  1.64  christos 			ADD_STRING(&str[i], len, 0);
    962   1.1  christos 			if (start == 0)
    963  1.40  christos 				ret = 0;
    964   1.1  christos 			else
    965  1.40  christos 				ret = 1;
    966   1.1  christos 			break;
    967   1.1  christos 		}
    968  1.40  christos 		ret = _history_expand_command (str, i, (j - i), &tmp);
    969  1.40  christos 		if (ret > 0 && tmp) {
    970  1.40  christos 			len = strlen(tmp);
    971  1.63  christos 			ADD_STRING(tmp, len, 1);
    972  1.66  christos 		}
    973  1.66  christos 		if (tmp) {
    974  1.40  christos 			free(tmp);
    975  1.64  christos 			tmp = NULL;
    976   1.1  christos 		}
    977   1.1  christos 		i = j;
    978  1.40  christos 	}
    979   1.1  christos 
    980  1.40  christos 	/* ret is 2 for "print only" option */
    981  1.40  christos 	if (ret == 2) {
    982  1.40  christos 		add_history(result);
    983   1.1  christos #ifdef GDB_411_HACK
    984   1.1  christos 		/* gdb 4.11 has been shipped with readline, where */
    985   1.1  christos 		/* history_expand() returned -1 when the line	  */
    986   1.1  christos 		/* should not be executed; in readline 2.1+	  */
    987   1.1  christos 		/* it should return 2 in such a case		  */
    988  1.40  christos 		ret = -1;
    989   1.1  christos #endif
    990   1.1  christos 	}
    991   1.1  christos 	free(*output);
    992   1.1  christos 	*output = result;
    993   1.1  christos 
    994  1.40  christos 	return (ret);
    995   1.1  christos }
    996   1.1  christos 
    997  1.40  christos /*
    998  1.40  christos * Return a string consisting of arguments of "str" from "start" to "end".
    999  1.40  christos */
   1000  1.40  christos char *
   1001  1.40  christos history_arg_extract(int start, int end, const char *str)
   1002  1.40  christos {
   1003  1.40  christos 	size_t  i, len, max;
   1004  1.84  christos 	char	**arr, *result = NULL;
   1005  1.40  christos 
   1006  1.40  christos 	arr = history_tokenize(str);
   1007  1.40  christos 	if (!arr)
   1008  1.84  christos 		return NULL;
   1009  1.84  christos 	if (arr && *arr == NULL)
   1010  1.84  christos 		goto out;
   1011  1.40  christos 
   1012  1.40  christos 	for (max = 0; arr[max]; max++)
   1013  1.40  christos 		continue;
   1014  1.40  christos 	max--;
   1015  1.40  christos 
   1016  1.40  christos 	if (start == '$')
   1017  1.80  christos 		start = (int)max;
   1018  1.40  christos 	if (end == '$')
   1019  1.80  christos 		end = (int)max;
   1020  1.40  christos 	if (end < 0)
   1021  1.80  christos 		end = (int)max + end + 1;
   1022  1.40  christos 	if (start < 0)
   1023  1.40  christos 		start = end;
   1024  1.40  christos 
   1025  1.84  christos 	if (start < 0 || end < 0 || (size_t)start > max ||
   1026  1.84  christos 	    (size_t)end > max || start > end)
   1027  1.84  christos 		goto out;
   1028  1.40  christos 
   1029  1.77     lukem 	for (i = start, len = 0; i <= (size_t)end; i++)
   1030  1.40  christos 		len += strlen(arr[i]) + 1;
   1031  1.40  christos 	len++;
   1032  1.40  christos 	result = malloc(len);
   1033  1.40  christos 	if (result == NULL)
   1034  1.84  christos 		goto out;
   1035  1.40  christos 
   1036  1.77     lukem 	for (i = start, len = 0; i <= (size_t)end; i++) {
   1037  1.40  christos 		(void)strcpy(result + len, arr[i]);
   1038  1.40  christos 		len += strlen(arr[i]);
   1039  1.77     lukem 		if (i < (size_t)end)
   1040  1.40  christos 			result[len++] = ' ';
   1041  1.40  christos 	}
   1042  1.76  christos 	result[len] = '\0';
   1043  1.40  christos 
   1044  1.84  christos out:
   1045  1.40  christos 	for (i = 0; arr[i]; i++)
   1046  1.40  christos 		free(arr[i]);
   1047  1.40  christos 	free(arr);
   1048  1.40  christos 
   1049  1.84  christos 	return result;
   1050  1.40  christos }
   1051  1.11     lukem 
   1052   1.1  christos /*
   1053  1.40  christos  * Parse the string into individual tokens,
   1054  1.40  christos  * similar to how shell would do it.
   1055   1.1  christos  */
   1056   1.1  christos char **
   1057  1.11     lukem history_tokenize(const char *str)
   1058   1.1  christos {
   1059  1.40  christos 	int size = 1, idx = 0, i, start;
   1060   1.5  christos 	size_t len;
   1061   1.1  christos 	char **result = NULL, *temp, delim = '\0';
   1062   1.1  christos 
   1063  1.40  christos 	for (i = 0; str[i];) {
   1064   1.4  christos 		while (isspace((unsigned char) str[i]))
   1065   1.1  christos 			i++;
   1066   1.1  christos 		start = i;
   1067  1.40  christos 		for (; str[i];) {
   1068   1.9  jdolecek 			if (str[i] == '\\') {
   1069  1.14  jdolecek 				if (str[i+1] != '\0')
   1070   1.9  jdolecek 					i++;
   1071   1.9  jdolecek 			} else if (str[i] == delim)
   1072   1.1  christos 				delim = '\0';
   1073   1.1  christos 			else if (!delim &&
   1074  1.11     lukem 				    (isspace((unsigned char) str[i]) ||
   1075  1.11     lukem 				strchr("()<>;&|$", str[i])))
   1076   1.1  christos 				break;
   1077   1.1  christos 			else if (!delim && strchr("'`\"", str[i]))
   1078   1.1  christos 				delim = str[i];
   1079  1.40  christos 			if (str[i])
   1080  1.40  christos 				i++;
   1081   1.1  christos 		}
   1082   1.1  christos 
   1083  1.40  christos 		if (idx + 2 >= size) {
   1084  1.23  christos 			char **nresult;
   1085   1.1  christos 			size <<= 1;
   1086  1.23  christos 			nresult = realloc(result, size * sizeof(char *));
   1087  1.23  christos 			if (nresult == NULL) {
   1088  1.23  christos 				free(result);
   1089  1.23  christos 				return NULL;
   1090  1.23  christos 			}
   1091  1.23  christos 			result = nresult;
   1092   1.1  christos 		}
   1093   1.1  christos 		len = i - start;
   1094   1.1  christos 		temp = malloc(len + 1);
   1095  1.23  christos 		if (temp == NULL) {
   1096  1.40  christos 			for (i = 0; i < idx; i++)
   1097  1.40  christos 				free(result[i]);
   1098  1.23  christos 			free(result);
   1099  1.23  christos 			return NULL;
   1100  1.23  christos 		}
   1101  1.40  christos 		(void)strncpy(temp, &str[start], len);
   1102   1.1  christos 		temp[len] = '\0';
   1103  1.40  christos 		result[idx++] = temp;
   1104  1.40  christos 		result[idx] = NULL;
   1105  1.40  christos 		if (str[i])
   1106  1.40  christos 			i++;
   1107   1.1  christos 	}
   1108  1.11     lukem 	return (result);
   1109   1.1  christos }
   1110   1.1  christos 
   1111  1.11     lukem 
   1112   1.1  christos /*
   1113   1.1  christos  * limit size of history record to ``max'' events
   1114   1.1  christos  */
   1115   1.1  christos void
   1116  1.11     lukem stifle_history(int max)
   1117   1.1  christos {
   1118  1.86  christos 	TYPE(HistEvent) ev;
   1119   1.1  christos 
   1120   1.1  christos 	if (h == NULL || e == NULL)
   1121   1.1  christos 		rl_initialize();
   1122   1.1  christos 
   1123  1.86  christos 	if (FUNW(history)(h, &ev, H_SETSIZE, max) == 0)
   1124   1.1  christos 		max_input_history = max;
   1125   1.1  christos }
   1126   1.1  christos 
   1127  1.11     lukem 
   1128   1.1  christos /*
   1129   1.1  christos  * "unlimit" size of history - set the limit to maximum allowed int value
   1130   1.1  christos  */
   1131   1.1  christos int
   1132  1.11     lukem unstifle_history(void)
   1133   1.1  christos {
   1134  1.86  christos 	TYPE(HistEvent) ev;
   1135   1.1  christos 	int omax;
   1136   1.1  christos 
   1137  1.86  christos 	FUNW(history)(h, &ev, H_SETSIZE, INT_MAX);
   1138   1.1  christos 	omax = max_input_history;
   1139   1.1  christos 	max_input_history = INT_MAX;
   1140  1.11     lukem 	return (omax);		/* some value _must_ be returned */
   1141   1.1  christos }
   1142   1.1  christos 
   1143  1.11     lukem 
   1144   1.1  christos int
   1145  1.11     lukem history_is_stifled(void)
   1146   1.1  christos {
   1147  1.11     lukem 
   1148   1.1  christos 	/* cannot return true answer */
   1149   1.1  christos 	return (max_input_history != INT_MAX);
   1150   1.1  christos }
   1151   1.1  christos 
   1152  1.85  christos static const char _history_tmp_template[] = "/tmp/.historyXXXXXX";
   1153  1.85  christos 
   1154  1.85  christos int
   1155  1.85  christos history_truncate_file (const char *filename, int nlines)
   1156  1.85  christos {
   1157  1.85  christos 	int ret = 0;
   1158  1.85  christos 	FILE *fp, *tp;
   1159  1.85  christos 	char template[sizeof(_history_tmp_template)];
   1160  1.85  christos 	char buf[4096];
   1161  1.85  christos 	int fd;
   1162  1.85  christos 	char *cp;
   1163  1.85  christos 	off_t off;
   1164  1.85  christos 	int count = 0;
   1165  1.85  christos 	ssize_t left = 0;
   1166  1.85  christos 
   1167  1.85  christos 	if (filename == NULL && (filename = _default_history_file()) == NULL)
   1168  1.85  christos 		return errno;
   1169  1.85  christos 	if ((fp = fopen(filename, "r+")) == NULL)
   1170  1.85  christos 		return errno;
   1171  1.85  christos 	strcpy(template, _history_tmp_template);
   1172  1.85  christos 	if ((fd = mkstemp(template)) == -1) {
   1173  1.85  christos 		ret = errno;
   1174  1.85  christos 		goto out1;
   1175  1.85  christos 	}
   1176  1.85  christos 
   1177  1.85  christos 	if ((tp = fdopen(fd, "r+")) == NULL) {
   1178  1.85  christos 		close(fd);
   1179  1.85  christos 		ret = errno;
   1180  1.85  christos 		goto out2;
   1181  1.85  christos 	}
   1182  1.85  christos 
   1183  1.85  christos 	for(;;) {
   1184  1.85  christos 		if (fread(buf, sizeof(buf), 1, fp) != 1) {
   1185  1.85  christos 			if (ferror(fp)) {
   1186  1.85  christos 				ret = errno;
   1187  1.85  christos 				break;
   1188  1.85  christos 			}
   1189  1.85  christos 			if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) ==
   1190  1.85  christos 			    (off_t)-1) {
   1191  1.85  christos 				ret = errno;
   1192  1.85  christos 				break;
   1193  1.85  christos 			}
   1194  1.85  christos 			left = fread(buf, 1, sizeof(buf), fp);
   1195  1.85  christos 			if (ferror(fp)) {
   1196  1.85  christos 				ret = errno;
   1197  1.85  christos 				break;
   1198  1.85  christos 			}
   1199  1.85  christos 			if (left == 0) {
   1200  1.85  christos 				count--;
   1201  1.85  christos 				left = sizeof(buf);
   1202  1.85  christos 			} else if (fwrite(buf, (size_t)left, 1, tp) != 1) {
   1203  1.85  christos 				ret = errno;
   1204  1.85  christos 				break;
   1205  1.85  christos 			}
   1206  1.85  christos 			fflush(tp);
   1207  1.85  christos 			break;
   1208  1.85  christos 		}
   1209  1.85  christos 		if (fwrite(buf, sizeof(buf), 1, tp) != 1) {
   1210  1.85  christos 			ret = errno;
   1211  1.85  christos 			break;
   1212  1.85  christos 		}
   1213  1.85  christos 		count++;
   1214  1.85  christos 	}
   1215  1.85  christos 	if (ret)
   1216  1.85  christos 		goto out3;
   1217  1.85  christos 	cp = buf + left - 1;
   1218  1.85  christos 	if(*cp != '\n')
   1219  1.85  christos 		cp++;
   1220  1.85  christos 	for(;;) {
   1221  1.85  christos 		while (--cp >= buf) {
   1222  1.85  christos 			if (*cp == '\n') {
   1223  1.85  christos 				if (--nlines == 0) {
   1224  1.85  christos 					if (++cp >= buf + sizeof(buf)) {
   1225  1.85  christos 						count++;
   1226  1.85  christos 						cp = buf;
   1227  1.85  christos 					}
   1228  1.85  christos 					break;
   1229  1.85  christos 				}
   1230  1.85  christos 			}
   1231  1.85  christos 		}
   1232  1.85  christos 		if (nlines <= 0 || count == 0)
   1233  1.85  christos 			break;
   1234  1.85  christos 		count--;
   1235  1.85  christos 		if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) < 0) {
   1236  1.85  christos 			ret = errno;
   1237  1.85  christos 			break;
   1238  1.85  christos 		}
   1239  1.85  christos 		if (fread(buf, sizeof(buf), 1, tp) != 1) {
   1240  1.85  christos 			if (ferror(tp)) {
   1241  1.85  christos 				ret = errno;
   1242  1.85  christos 				break;
   1243  1.85  christos 			}
   1244  1.85  christos 			ret = EAGAIN;
   1245  1.85  christos 			break;
   1246  1.85  christos 		}
   1247  1.85  christos 		cp = buf + sizeof(buf);
   1248  1.85  christos 	}
   1249  1.85  christos 
   1250  1.85  christos 	if (ret || nlines > 0)
   1251  1.85  christos 		goto out3;
   1252  1.85  christos 
   1253  1.85  christos 	if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) {
   1254  1.85  christos 		ret = errno;
   1255  1.85  christos 		goto out3;
   1256  1.85  christos 	}
   1257  1.85  christos 
   1258  1.85  christos 	if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) ==
   1259  1.85  christos 	    (off_t)-1) {
   1260  1.85  christos 		ret = errno;
   1261  1.85  christos 		goto out3;
   1262  1.85  christos 	}
   1263  1.85  christos 
   1264  1.85  christos 	for(;;) {
   1265  1.85  christos 		if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) {
   1266  1.85  christos 			if (ferror(fp))
   1267  1.85  christos 				ret = errno;
   1268  1.85  christos 			break;
   1269  1.85  christos 		}
   1270  1.85  christos 		if (fwrite(buf, (size_t)left, 1, fp) != 1) {
   1271  1.85  christos 			ret = errno;
   1272  1.85  christos 			break;
   1273  1.85  christos 		}
   1274  1.85  christos 	}
   1275  1.85  christos 	fflush(fp);
   1276  1.85  christos 	if((off = ftello(fp)) > 0)
   1277  1.85  christos 		(void)ftruncate(fileno(fp), off);
   1278  1.85  christos out3:
   1279  1.85  christos 	fclose(tp);
   1280  1.85  christos out2:
   1281  1.85  christos 	unlink(template);
   1282  1.85  christos out1:
   1283  1.85  christos 	fclose(fp);
   1284  1.85  christos 
   1285  1.85  christos 	return ret;
   1286  1.85  christos }
   1287  1.85  christos 
   1288  1.11     lukem 
   1289   1.1  christos /*
   1290   1.1  christos  * read history from a file given
   1291   1.1  christos  */
   1292   1.1  christos int
   1293  1.11     lukem read_history(const char *filename)
   1294   1.1  christos {
   1295  1.86  christos 	TYPE(HistEvent) ev;
   1296   1.1  christos 
   1297   1.1  christos 	if (h == NULL || e == NULL)
   1298   1.1  christos 		rl_initialize();
   1299  1.85  christos 	if (filename == NULL && (filename = _default_history_file()) == NULL)
   1300  1.85  christos 		return errno;
   1301  1.88  christos 	return (FUNW(history)(h, &ev, H_LOAD, filename) == -1 ?
   1302  1.88  christos 	    (errno ? errno : EINVAL) : 0);
   1303   1.1  christos }
   1304   1.1  christos 
   1305  1.11     lukem 
   1306   1.1  christos /*
   1307   1.1  christos  * write history to a file given
   1308   1.1  christos  */
   1309   1.1  christos int
   1310  1.11     lukem write_history(const char *filename)
   1311   1.1  christos {
   1312  1.86  christos 	TYPE(HistEvent) ev;
   1313   1.1  christos 
   1314   1.1  christos 	if (h == NULL || e == NULL)
   1315   1.1  christos 		rl_initialize();
   1316  1.85  christos 	if (filename == NULL && (filename = _default_history_file()) == NULL)
   1317  1.85  christos 		return errno;
   1318  1.88  christos 	return (FUNW(history)(h, &ev, H_SAVE, filename) == -1 ?
   1319  1.88  christos 	    (errno ? errno : EINVAL) : 0);
   1320   1.1  christos }
   1321   1.1  christos 
   1322  1.11     lukem 
   1323   1.1  christos /*
   1324   1.1  christos  * returns history ``num''th event
   1325   1.1  christos  *
   1326   1.1  christos  * returned pointer points to static variable
   1327   1.1  christos  */
   1328   1.2  christos HIST_ENTRY *
   1329  1.11     lukem history_get(int num)
   1330   1.1  christos {
   1331   1.1  christos 	static HIST_ENTRY she;
   1332  1.86  christos 	TYPE(HistEvent) ev;
   1333  1.40  christos 	int curr_num;
   1334   1.1  christos 
   1335   1.1  christos 	if (h == NULL || e == NULL)
   1336   1.1  christos 		rl_initialize();
   1337   1.1  christos 
   1338  1.40  christos 	/* save current position */
   1339  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1340  1.11     lukem 		return (NULL);
   1341   1.1  christos 	curr_num = ev.num;
   1342  1.40  christos 
   1343  1.85  christos 	/* start from the oldest */
   1344  1.86  christos 	if (FUNW(history)(h, &ev, H_LAST) != 0)
   1345  1.11     lukem 		return (NULL);	/* error */
   1346  1.40  christos 
   1347  1.85  christos 	/* look forwards for event matching specified offset */
   1348  1.86  christos 	if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &she.data))
   1349  1.40  christos 		return (NULL);
   1350   1.1  christos 
   1351  1.86  christos 	she.line = ct_encode_string(ev.str, &conv);
   1352   1.1  christos 
   1353  1.40  christos 	/* restore pointer to where it was */
   1354  1.86  christos 	(void)FUNW(history)(h, &ev, H_SET, curr_num);
   1355   1.1  christos 
   1356  1.11     lukem 	return (&she);
   1357   1.1  christos }
   1358   1.1  christos 
   1359  1.11     lukem 
   1360   1.1  christos /*
   1361   1.1  christos  * add the line to history table
   1362   1.1  christos  */
   1363   1.1  christos int
   1364  1.11     lukem add_history(const char *line)
   1365   1.1  christos {
   1366  1.86  christos 	TYPE(HistEvent) ev;
   1367   1.1  christos 
   1368   1.1  christos 	if (h == NULL || e == NULL)
   1369   1.1  christos 		rl_initialize();
   1370   1.1  christos 
   1371  1.86  christos 	(void)FUNW(history)(h, &ev, H_ENTER, line);
   1372  1.86  christos 	if (FUNW(history)(h, &ev, H_GETSIZE) == 0)
   1373   1.1  christos 		history_length = ev.num;
   1374   1.1  christos 
   1375  1.40  christos 	return (!(history_length > 0)); /* return 0 if all is okay */
   1376   1.1  christos }
   1377   1.1  christos 
   1378  1.11     lukem 
   1379   1.1  christos /*
   1380  1.58  christos  * remove the specified entry from the history list and return it.
   1381  1.58  christos  */
   1382  1.58  christos HIST_ENTRY *
   1383  1.58  christos remove_history(int num)
   1384  1.58  christos {
   1385  1.85  christos 	HIST_ENTRY *he;
   1386  1.86  christos 	TYPE(HistEvent) ev;
   1387  1.58  christos 
   1388  1.58  christos 	if (h == NULL || e == NULL)
   1389  1.58  christos 		rl_initialize();
   1390  1.58  christos 
   1391  1.85  christos 	if ((he = malloc(sizeof(*he))) == NULL)
   1392  1.58  christos 		return NULL;
   1393  1.58  christos 
   1394  1.86  christos 	if (FUNW(history)(h, &ev, H_DELDATA, num, &he->data) != 0) {
   1395  1.85  christos 		free(he);
   1396  1.71  christos 		return NULL;
   1397  1.85  christos 	}
   1398  1.71  christos 
   1399  1.86  christos 	he->line = ct_encode_string(ev.str, &conv);
   1400  1.86  christos 	if (FUNW(history)(h, &ev, H_GETSIZE) == 0)
   1401  1.85  christos 		history_length = ev.num;
   1402  1.58  christos 
   1403  1.85  christos 	return he;
   1404  1.58  christos }
   1405  1.58  christos 
   1406  1.58  christos 
   1407  1.58  christos /*
   1408  1.85  christos  * replace the line and data of the num-th entry
   1409  1.85  christos  */
   1410  1.85  christos HIST_ENTRY *
   1411  1.85  christos replace_history_entry(int num, const char *line, histdata_t data)
   1412  1.85  christos {
   1413  1.85  christos 	HIST_ENTRY *he;
   1414  1.86  christos 	TYPE(HistEvent) ev;
   1415  1.85  christos 	int curr_num;
   1416  1.85  christos 
   1417  1.85  christos 	if (h == NULL || e == NULL)
   1418  1.85  christos 		rl_initialize();
   1419  1.85  christos 
   1420  1.85  christos 	/* save current position */
   1421  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1422  1.85  christos 		return NULL;
   1423  1.85  christos 	curr_num = ev.num;
   1424  1.85  christos 
   1425  1.85  christos 	/* start from the oldest */
   1426  1.86  christos 	if (FUNW(history)(h, &ev, H_LAST) != 0)
   1427  1.85  christos 		return NULL;	/* error */
   1428  1.85  christos 
   1429  1.85  christos 	if ((he = malloc(sizeof(*he))) == NULL)
   1430  1.85  christos 		return NULL;
   1431  1.85  christos 
   1432  1.85  christos 	/* look forwards for event matching specified offset */
   1433  1.86  christos 	if (FUNW(history)(h, &ev, H_NEXT_EVDATA, num, &he->data))
   1434  1.85  christos 		goto out;
   1435  1.85  christos 
   1436  1.86  christos 	he->line = strdup(ct_encode_string(ev.str, &e->el_scratch));
   1437  1.85  christos 	if (he->line == NULL)
   1438  1.85  christos 		goto out;
   1439  1.85  christos 
   1440  1.86  christos 	if (FUNW(history)(h, &ev, H_REPLACE, line, data))
   1441  1.85  christos 		goto out;
   1442  1.85  christos 
   1443  1.85  christos 	/* restore pointer to where it was */
   1444  1.86  christos 	if (FUNW(history)(h, &ev, H_SET, curr_num))
   1445  1.85  christos 		goto out;
   1446  1.85  christos 
   1447  1.85  christos 	return he;
   1448  1.85  christos out:
   1449  1.85  christos 	free(he);
   1450  1.85  christos 	return NULL;
   1451  1.85  christos }
   1452  1.85  christos 
   1453  1.85  christos /*
   1454   1.1  christos  * clear the history list - delete all entries
   1455   1.1  christos  */
   1456   1.1  christos void
   1457  1.11     lukem clear_history(void)
   1458   1.1  christos {
   1459  1.86  christos 	TYPE(HistEvent) ev;
   1460  1.11     lukem 
   1461  1.88  christos 	(void)FUNW(history)(h, &ev, H_CLEAR);
   1462  1.85  christos 	history_length = 0;
   1463   1.1  christos }
   1464   1.1  christos 
   1465  1.11     lukem 
   1466   1.1  christos /*
   1467   1.1  christos  * returns offset of the current history event
   1468   1.1  christos  */
   1469   1.1  christos int
   1470  1.11     lukem where_history(void)
   1471   1.1  christos {
   1472  1.86  christos 	TYPE(HistEvent) ev;
   1473   1.1  christos 	int curr_num, off;
   1474   1.1  christos 
   1475  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1476  1.11     lukem 		return (0);
   1477   1.1  christos 	curr_num = ev.num;
   1478   1.1  christos 
   1479  1.88  christos 	(void)FUNW(history)(h, &ev, H_FIRST);
   1480   1.1  christos 	off = 1;
   1481  1.86  christos 	while (ev.num != curr_num && FUNW(history)(h, &ev, H_NEXT) == 0)
   1482   1.1  christos 		off++;
   1483   1.1  christos 
   1484  1.11     lukem 	return (off);
   1485   1.1  christos }
   1486   1.1  christos 
   1487  1.11     lukem 
   1488   1.1  christos /*
   1489   1.1  christos  * returns current history event or NULL if there is no such event
   1490   1.1  christos  */
   1491   1.2  christos HIST_ENTRY *
   1492  1.11     lukem current_history(void)
   1493   1.1  christos {
   1494  1.11     lukem 
   1495  1.11     lukem 	return (_move_history(H_CURR));
   1496   1.1  christos }
   1497   1.1  christos 
   1498  1.11     lukem 
   1499   1.1  christos /*
   1500   1.1  christos  * returns total number of bytes history events' data are using
   1501   1.1  christos  */
   1502   1.1  christos int
   1503  1.11     lukem history_total_bytes(void)
   1504   1.1  christos {
   1505  1.86  christos 	TYPE(HistEvent) ev;
   1506  1.80  christos 	int curr_num;
   1507  1.80  christos 	size_t size;
   1508   1.1  christos 
   1509  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1510  1.11     lukem 		return (-1);
   1511   1.1  christos 	curr_num = ev.num;
   1512   1.1  christos 
   1513  1.88  christos 	(void)FUNW(history)(h, &ev, H_FIRST);
   1514   1.1  christos 	size = 0;
   1515   1.1  christos 	do
   1516  1.86  christos 		size += Strlen(ev.str) * sizeof(*ev.str);
   1517  1.86  christos 	while (FUNW(history)(h, &ev, H_NEXT) == 0);
   1518   1.1  christos 
   1519   1.1  christos 	/* get to the same position as before */
   1520  1.86  christos 	FUNW(history)(h, &ev, H_PREV_EVENT, curr_num);
   1521   1.1  christos 
   1522  1.80  christos 	return (int)(size);
   1523   1.1  christos }
   1524   1.1  christos 
   1525  1.11     lukem 
   1526   1.1  christos /*
   1527   1.1  christos  * sets the position in the history list to ``pos''
   1528   1.1  christos  */
   1529   1.1  christos int
   1530  1.11     lukem history_set_pos(int pos)
   1531   1.1  christos {
   1532  1.86  christos 	TYPE(HistEvent) ev;
   1533  1.40  christos 	int curr_num;
   1534   1.1  christos 
   1535  1.85  christos 	if (pos >= history_length || pos < 0)
   1536  1.11     lukem 		return (-1);
   1537   1.1  christos 
   1538  1.88  christos 	(void)FUNW(history)(h, &ev, H_CURR);
   1539   1.1  christos 	curr_num = ev.num;
   1540   1.1  christos 
   1541  1.85  christos 	/*
   1542  1.85  christos 	 * use H_DELDATA to set to nth history (without delete) by passing
   1543  1.85  christos 	 * (void **)-1
   1544  1.85  christos 	 */
   1545  1.86  christos 	if (FUNW(history)(h, &ev, H_DELDATA, pos, (void **)-1)) {
   1546  1.88  christos 		(void)FUNW(history)(h, &ev, H_SET, curr_num);
   1547  1.40  christos 		return(-1);
   1548   1.1  christos 	}
   1549  1.11     lukem 	return (0);
   1550   1.1  christos }
   1551   1.1  christos 
   1552  1.11     lukem 
   1553   1.1  christos /*
   1554   1.1  christos  * returns previous event in history and shifts pointer accordingly
   1555   1.1  christos  */
   1556   1.2  christos HIST_ENTRY *
   1557  1.11     lukem previous_history(void)
   1558   1.1  christos {
   1559  1.11     lukem 
   1560  1.11     lukem 	return (_move_history(H_PREV));
   1561   1.1  christos }
   1562   1.1  christos 
   1563  1.11     lukem 
   1564   1.1  christos /*
   1565   1.1  christos  * returns next event in history and shifts pointer accordingly
   1566   1.1  christos  */
   1567   1.2  christos HIST_ENTRY *
   1568  1.11     lukem next_history(void)
   1569   1.1  christos {
   1570  1.11     lukem 
   1571  1.11     lukem 	return (_move_history(H_NEXT));
   1572   1.1  christos }
   1573   1.1  christos 
   1574  1.11     lukem 
   1575   1.1  christos /*
   1576  1.40  christos  * searches for first history event containing the str
   1577   1.1  christos  */
   1578  1.40  christos int
   1579  1.40  christos history_search(const char *str, int direction)
   1580  1.11     lukem {
   1581  1.86  christos 	TYPE(HistEvent) ev;
   1582  1.86  christos 	const Char *strp;
   1583  1.86  christos 	const Char *wstr;
   1584  1.11     lukem 	int curr_num;
   1585   1.1  christos 
   1586  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1587  1.11     lukem 		return (-1);
   1588   1.1  christos 	curr_num = ev.num;
   1589   1.1  christos 
   1590  1.86  christos 	wstr = ct_decode_string(str, &conv);
   1591   1.1  christos 	for (;;) {
   1592  1.86  christos 		if ((strp = Strstr(ev.str, wstr)) != NULL)
   1593   1.1  christos 			return (int) (strp - ev.str);
   1594  1.86  christos 		if (FUNW(history)(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
   1595   1.1  christos 			break;
   1596   1.1  christos 	}
   1597  1.88  christos 	(void)FUNW(history)(h, &ev, H_SET, curr_num);
   1598  1.11     lukem 	return (-1);
   1599   1.1  christos }
   1600   1.1  christos 
   1601  1.11     lukem 
   1602   1.1  christos /*
   1603   1.1  christos  * searches for first history event beginning with str
   1604   1.1  christos  */
   1605   1.1  christos int
   1606  1.11     lukem history_search_prefix(const char *str, int direction)
   1607   1.1  christos {
   1608  1.86  christos 	TYPE(HistEvent) ev;
   1609  1.11     lukem 
   1610  1.88  christos 	return (FUNW(history)(h, &ev, direction < 0 ?
   1611  1.88  christos 	    H_PREV_STR : H_NEXT_STR, str));
   1612   1.1  christos }
   1613   1.1  christos 
   1614  1.11     lukem 
   1615   1.1  christos /*
   1616   1.1  christos  * search for event in history containing str, starting at offset
   1617   1.1  christos  * abs(pos); continue backward, if pos<0, forward otherwise
   1618   1.1  christos  */
   1619   1.5  christos /* ARGSUSED */
   1620   1.1  christos int
   1621  1.40  christos history_search_pos(const char *str,
   1622  1.30  christos 		   int direction __attribute__((__unused__)), int pos)
   1623   1.1  christos {
   1624  1.86  christos 	TYPE(HistEvent) ev;
   1625  1.11     lukem 	int curr_num, off;
   1626  1.86  christos 	const Char *wstr;
   1627   1.1  christos 
   1628   1.1  christos 	off = (pos > 0) ? pos : -pos;
   1629   1.1  christos 	pos = (pos > 0) ? 1 : -1;
   1630   1.1  christos 
   1631  1.86  christos 	if (FUNW(history)(h, &ev, H_CURR) != 0)
   1632  1.11     lukem 		return (-1);
   1633   1.1  christos 	curr_num = ev.num;
   1634   1.1  christos 
   1635  1.86  christos 	if (history_set_pos(off) != 0 || FUNW(history)(h, &ev, H_CURR) != 0)
   1636  1.11     lukem 		return (-1);
   1637   1.1  christos 
   1638  1.86  christos 	wstr = ct_decode_string(str, &conv);
   1639   1.1  christos 	for (;;) {
   1640  1.86  christos 		if (Strstr(ev.str, wstr))
   1641  1.11     lukem 			return (off);
   1642  1.86  christos 		if (FUNW(history)(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
   1643   1.1  christos 			break;
   1644   1.1  christos 	}
   1645   1.1  christos 
   1646   1.1  christos 	/* set "current" pointer back to previous state */
   1647  1.88  christos 	(void)FUNW(history)(h, &ev,
   1648  1.88  christos 	    pos < 0 ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
   1649   1.1  christos 
   1650  1.11     lukem 	return (-1);
   1651   1.1  christos }
   1652   1.1  christos 
   1653   1.1  christos 
   1654   1.1  christos /********************************/
   1655  1.40  christos /* completion functions */
   1656   1.1  christos 
   1657  1.57  christos char *
   1658  1.57  christos tilde_expand(char *name)
   1659  1.57  christos {
   1660  1.57  christos 	return fn_tilde_expand(name);
   1661  1.57  christos }
   1662  1.57  christos 
   1663  1.57  christos char *
   1664  1.57  christos filename_completion_function(const char *name, int state)
   1665  1.57  christos {
   1666  1.57  christos 	return fn_filename_completion_function(name, state);
   1667  1.57  christos }
   1668  1.57  christos 
   1669   1.1  christos /*
   1670   1.1  christos  * a completion generator for usernames; returns _first_ username
   1671   1.1  christos  * which starts with supplied text
   1672   1.1  christos  * text contains a partial username preceded by random character
   1673   1.1  christos  * (usually '~'); state is ignored
   1674   1.1  christos  * it's callers responsibility to free returned value
   1675   1.1  christos  */
   1676  1.11     lukem char *
   1677  1.11     lukem username_completion_function(const char *text, int state)
   1678   1.1  christos {
   1679  1.50  christos 	struct passwd *pwd, pwres;
   1680  1.50  christos 	char pwbuf[1024];
   1681   1.1  christos 
   1682   1.1  christos 	if (text[0] == '\0')
   1683  1.11     lukem 		return (NULL);
   1684   1.1  christos 
   1685   1.1  christos 	if (*text == '~')
   1686   1.1  christos 		text++;
   1687   1.1  christos 
   1688   1.1  christos 	if (state == 0)
   1689   1.1  christos 		setpwent();
   1690   1.1  christos 
   1691  1.50  christos 	while (getpwent_r(&pwres, pwbuf, sizeof(pwbuf), &pwd) == 0
   1692  1.52  christos 	    && pwd != NULL && text[0] == pwd->pw_name[0]
   1693  1.11     lukem 	    && strcmp(text, pwd->pw_name) == 0);
   1694   1.1  christos 
   1695   1.1  christos 	if (pwd == NULL) {
   1696   1.1  christos 		endpwent();
   1697  1.85  christos 		return NULL;
   1698   1.1  christos 	}
   1699  1.85  christos 	return strdup(pwd->pw_name);
   1700   1.1  christos }
   1701   1.1  christos 
   1702  1.11     lukem 
   1703   1.1  christos /*
   1704  1.46  christos  * el-compatible wrapper to send TSTP on ^Z
   1705  1.46  christos  */
   1706  1.46  christos /* ARGSUSED */
   1707  1.46  christos static unsigned char
   1708  1.46  christos _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
   1709  1.46  christos {
   1710  1.46  christos 	(void)kill(0, SIGTSTP);
   1711  1.46  christos 	return CC_NORM;
   1712  1.46  christos }
   1713  1.11     lukem 
   1714   1.1  christos /*
   1715  1.12  jdolecek  * Display list of strings in columnar format on readline's output stream.
   1716  1.12  jdolecek  * 'matches' is list of strings, 'len' is number of strings in 'matches',
   1717  1.12  jdolecek  * 'max' is maximum length of string in 'matches'.
   1718  1.12  jdolecek  */
   1719  1.12  jdolecek void
   1720  1.53       dsl rl_display_match_list(char **matches, int len, int max)
   1721  1.12  jdolecek {
   1722  1.12  jdolecek 
   1723  1.81  christos 	fn_display_match_list(e, matches, (size_t)len, (size_t)max);
   1724   1.1  christos }
   1725   1.1  christos 
   1726  1.56  christos static const char *
   1727  1.56  christos /*ARGSUSED*/
   1728  1.56  christos _rl_completion_append_character_function(const char *dummy
   1729  1.56  christos     __attribute__((__unused__)))
   1730  1.56  christos {
   1731  1.56  christos 	static char buf[2];
   1732  1.76  christos 	buf[0] = rl_completion_append_character;
   1733  1.76  christos 	buf[1] = '\0';
   1734  1.56  christos 	return buf;
   1735  1.56  christos }
   1736  1.56  christos 
   1737  1.11     lukem 
   1738   1.1  christos /*
   1739   1.1  christos  * complete word at current point
   1740   1.1  christos  */
   1741  1.53       dsl /* ARGSUSED */
   1742   1.1  christos int
   1743  1.53       dsl rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
   1744   1.1  christos {
   1745  1.86  christos #ifdef WIDECHAR
   1746  1.86  christos 	static ct_buffer_t wbreak_conv, sprefix_conv;
   1747  1.86  christos #endif
   1748  1.86  christos 
   1749   1.1  christos 	if (h == NULL || e == NULL)
   1750   1.1  christos 		rl_initialize();
   1751   1.1  christos 
   1752   1.1  christos 	if (rl_inhibit_completion) {
   1753  1.47  christos 		char arr[2];
   1754  1.47  christos 		arr[0] = (char)invoking_key;
   1755  1.47  christos 		arr[1] = '\0';
   1756  1.47  christos 		el_insertstr(e, arr);
   1757  1.11     lukem 		return (CC_REFRESH);
   1758  1.53       dsl 	}
   1759  1.53       dsl 
   1760  1.53       dsl 	/* Just look at how many global variables modify this operation! */
   1761  1.53       dsl 	return fn_complete(e,
   1762  1.53       dsl 	    (CPFunction *)rl_completion_entry_function,
   1763  1.53       dsl 	    rl_attempted_completion_function,
   1764  1.86  christos 	    ct_decode_string(rl_basic_word_break_characters, &wbreak_conv),
   1765  1.86  christos 	    ct_decode_string(rl_special_prefixes, &sprefix_conv),
   1766  1.81  christos 	    _rl_completion_append_character_function,
   1767  1.81  christos 	    (size_t)rl_completion_query_items,
   1768  1.53       dsl 	    &rl_completion_type, &rl_attempted_completion_over,
   1769  1.53       dsl 	    &rl_point, &rl_end);
   1770   1.1  christos }
   1771   1.1  christos 
   1772  1.11     lukem 
   1773  1.53       dsl /* ARGSUSED */
   1774  1.53       dsl static unsigned char
   1775  1.53       dsl _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
   1776  1.53       dsl {
   1777  1.53       dsl 	return (unsigned char)rl_complete(0, ch);
   1778  1.53       dsl }
   1779  1.53       dsl 
   1780   1.1  christos /*
   1781   1.7    simonb  * misc other functions
   1782   1.1  christos  */
   1783   1.1  christos 
   1784   1.1  christos /*
   1785   1.1  christos  * bind key c to readline-type function func
   1786   1.1  christos  */
   1787   1.1  christos int
   1788  1.85  christos rl_bind_key(int c, rl_command_func_t *func)
   1789   1.1  christos {
   1790  1.11     lukem 	int retval = -1;
   1791   1.1  christos 
   1792   1.1  christos 	if (h == NULL || e == NULL)
   1793   1.1  christos 		rl_initialize();
   1794   1.1  christos 
   1795   1.1  christos 	if (func == rl_insert) {
   1796   1.1  christos 		/* XXX notice there is no range checking of ``c'' */
   1797   1.1  christos 		e->el_map.key[c] = ED_INSERT;
   1798   1.1  christos 		retval = 0;
   1799   1.1  christos 	}
   1800  1.11     lukem 	return (retval);
   1801   1.1  christos }
   1802   1.1  christos 
   1803  1.11     lukem 
   1804   1.1  christos /*
   1805   1.1  christos  * read one key from input - handles chars pushed back
   1806   1.1  christos  * to input stream also
   1807   1.1  christos  */
   1808   1.1  christos int
   1809  1.11     lukem rl_read_key(void)
   1810   1.1  christos {
   1811  1.11     lukem 	char fooarr[2 * sizeof(int)];
   1812   1.1  christos 
   1813   1.1  christos 	if (e == NULL || h == NULL)
   1814   1.1  christos 		rl_initialize();
   1815   1.1  christos 
   1816  1.11     lukem 	return (el_getc(e, fooarr));
   1817   1.1  christos }
   1818   1.1  christos 
   1819  1.11     lukem 
   1820   1.1  christos /*
   1821   1.1  christos  * reset the terminal
   1822   1.1  christos  */
   1823   1.5  christos /* ARGSUSED */
   1824   1.1  christos void
   1825  1.30  christos rl_reset_terminal(const char *p __attribute__((__unused__)))
   1826   1.1  christos {
   1827  1.11     lukem 
   1828   1.1  christos 	if (h == NULL || e == NULL)
   1829   1.1  christos 		rl_initialize();
   1830   1.1  christos 	el_reset(e);
   1831   1.1  christos }
   1832   1.1  christos 
   1833  1.11     lukem 
   1834   1.1  christos /*
   1835   1.1  christos  * insert character ``c'' back into input stream, ``count'' times
   1836   1.1  christos  */
   1837   1.1  christos int
   1838  1.11     lukem rl_insert(int count, int c)
   1839   1.1  christos {
   1840  1.11     lukem 	char arr[2];
   1841   1.1  christos 
   1842   1.1  christos 	if (h == NULL || e == NULL)
   1843   1.1  christos 		rl_initialize();
   1844   1.1  christos 
   1845   1.1  christos 	/* XXX - int -> char conversion can lose on multichars */
   1846   1.1  christos 	arr[0] = c;
   1847   1.1  christos 	arr[1] = '\0';
   1848   1.1  christos 
   1849   1.1  christos 	for (; count > 0; count--)
   1850   1.1  christos 		el_push(e, arr);
   1851   1.1  christos 
   1852  1.11     lukem 	return (0);
   1853  1.35  christos }
   1854  1.35  christos 
   1855  1.85  christos int
   1856  1.85  christos rl_insert_text(const char *text)
   1857  1.85  christos {
   1858  1.85  christos 	if (!text || *text == 0)
   1859  1.85  christos 		return (0);
   1860  1.85  christos 
   1861  1.85  christos 	if (h == NULL || e == NULL)
   1862  1.85  christos 		rl_initialize();
   1863  1.85  christos 
   1864  1.85  christos 	if (el_insertstr(e, text) < 0)
   1865  1.85  christos 		return (0);
   1866  1.85  christos 	return (int)strlen(text);
   1867  1.85  christos }
   1868  1.85  christos 
   1869  1.35  christos /*ARGSUSED*/
   1870  1.35  christos int
   1871  1.35  christos rl_newline(int count, int c)
   1872  1.35  christos {
   1873  1.35  christos 	/*
   1874  1.35  christos 	 * Readline-4.0 appears to ignore the args.
   1875  1.35  christos 	 */
   1876  1.35  christos 	return rl_insert(1, '\n');
   1877  1.35  christos }
   1878  1.35  christos 
   1879  1.35  christos /*ARGSUSED*/
   1880  1.35  christos static unsigned char
   1881  1.35  christos rl_bind_wrapper(EditLine *el, unsigned char c)
   1882  1.35  christos {
   1883  1.35  christos 	if (map[c] == NULL)
   1884  1.35  christos 	    return CC_ERROR;
   1885  1.49  christos 
   1886  1.49  christos 	_rl_update_pos();
   1887  1.49  christos 
   1888  1.35  christos 	(*map[c])(NULL, c);
   1889  1.38  christos 
   1890  1.38  christos 	/* If rl_done was set by the above call, deal with it here */
   1891  1.38  christos 	if (rl_done)
   1892  1.38  christos 		return CC_EOF;
   1893  1.38  christos 
   1894  1.35  christos 	return CC_NORM;
   1895  1.35  christos }
   1896  1.35  christos 
   1897  1.35  christos int
   1898  1.35  christos rl_add_defun(const char *name, Function *fun, int c)
   1899  1.35  christos {
   1900  1.35  christos 	char dest[8];
   1901  1.77     lukem 	if ((size_t)c >= sizeof(map) / sizeof(map[0]) || c < 0)
   1902  1.35  christos 		return -1;
   1903  1.35  christos 	map[(unsigned char)c] = fun;
   1904  1.35  christos 	el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
   1905  1.37  christos 	vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
   1906  1.37  christos 	el_set(e, EL_BIND, dest, name);
   1907  1.35  christos 	return 0;
   1908  1.35  christos }
   1909  1.35  christos 
   1910  1.35  christos void
   1911  1.35  christos rl_callback_read_char()
   1912  1.35  christos {
   1913  1.36  christos 	int count = 0, done = 0;
   1914  1.35  christos 	const char *buf = el_gets(e, &count);
   1915  1.35  christos 	char *wbuf;
   1916  1.35  christos 
   1917  1.35  christos 	if (buf == NULL || count-- <= 0)
   1918  1.35  christos 		return;
   1919  1.61  christos 	if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF])
   1920  1.36  christos 		done = 1;
   1921  1.36  christos 	if (buf[count] == '\n' || buf[count] == '\r')
   1922  1.36  christos 		done = 2;
   1923  1.36  christos 
   1924  1.36  christos 	if (done && rl_linefunc != NULL) {
   1925  1.35  christos 		el_set(e, EL_UNBUFFERED, 0);
   1926  1.36  christos 		if (done == 2) {
   1927  1.36  christos 		    if ((wbuf = strdup(buf)) != NULL)
   1928  1.36  christos 			wbuf[count] = '\0';
   1929  1.36  christos 		} else
   1930  1.36  christos 			wbuf = NULL;
   1931  1.35  christos 		(*(void (*)(const char *))rl_linefunc)(wbuf);
   1932  1.85  christos 		//el_set(e, EL_UNBUFFERED, 1);
   1933  1.35  christos 	}
   1934  1.35  christos }
   1935  1.35  christos 
   1936  1.35  christos void
   1937  1.72  christos rl_callback_handler_install(const char *prompt, VCPFunction *linefunc)
   1938  1.35  christos {
   1939  1.35  christos 	if (e == NULL) {
   1940  1.35  christos 		rl_initialize();
   1941  1.35  christos 	}
   1942  1.78  christos 	(void)rl_set_prompt(prompt);
   1943  1.35  christos 	rl_linefunc = linefunc;
   1944  1.35  christos 	el_set(e, EL_UNBUFFERED, 1);
   1945  1.35  christos }
   1946  1.35  christos 
   1947  1.35  christos void
   1948  1.35  christos rl_callback_handler_remove(void)
   1949  1.35  christos {
   1950  1.35  christos 	el_set(e, EL_UNBUFFERED, 0);
   1951  1.72  christos 	rl_linefunc = NULL;
   1952  1.35  christos }
   1953  1.35  christos 
   1954  1.35  christos void
   1955  1.35  christos rl_redisplay(void)
   1956  1.35  christos {
   1957  1.35  christos 	char a[2];
   1958  1.61  christos 	a[0] = e->el_tty.t_c[TS_IO][C_REPRINT];
   1959  1.35  christos 	a[1] = '\0';
   1960  1.35  christos 	el_push(e, a);
   1961  1.35  christos }
   1962  1.35  christos 
   1963  1.35  christos int
   1964  1.35  christos rl_get_previous_history(int count, int key)
   1965  1.35  christos {
   1966  1.35  christos 	char a[2];
   1967  1.35  christos 	a[0] = key;
   1968  1.35  christos 	a[1] = '\0';
   1969  1.35  christos 	while (count--)
   1970  1.35  christos 		el_push(e, a);
   1971  1.35  christos 	return 0;
   1972  1.38  christos }
   1973  1.38  christos 
   1974  1.38  christos void
   1975  1.38  christos /*ARGSUSED*/
   1976  1.38  christos rl_prep_terminal(int meta_flag)
   1977  1.38  christos {
   1978  1.38  christos 	el_set(e, EL_PREP_TERM, 1);
   1979  1.38  christos }
   1980  1.38  christos 
   1981  1.38  christos void
   1982  1.68  christos rl_deprep_terminal(void)
   1983  1.38  christos {
   1984  1.38  christos 	el_set(e, EL_PREP_TERM, 0);
   1985  1.38  christos }
   1986  1.38  christos 
   1987  1.38  christos int
   1988  1.38  christos rl_read_init_file(const char *s)
   1989  1.38  christos {
   1990  1.38  christos 	return(el_source(e, s));
   1991  1.38  christos }
   1992  1.38  christos 
   1993  1.38  christos int
   1994  1.38  christos rl_parse_and_bind(const char *line)
   1995  1.38  christos {
   1996  1.38  christos 	const char **argv;
   1997  1.38  christos 	int argc;
   1998  1.38  christos 	Tokenizer *tok;
   1999  1.38  christos 
   2000  1.38  christos 	tok = tok_init(NULL);
   2001  1.44     lukem 	tok_str(tok, line, &argc, &argv);
   2002  1.38  christos 	argc = el_parse(e, argc, argv);
   2003  1.38  christos 	tok_end(tok);
   2004  1.38  christos 	return (argc ? 1 : 0);
   2005  1.38  christos }
   2006  1.38  christos 
   2007  1.51  christos int
   2008  1.51  christos rl_variable_bind(const char *var, const char *value)
   2009  1.51  christos {
   2010  1.51  christos 	/*
   2011  1.51  christos 	 * The proper return value is undocument, but this is what the
   2012  1.51  christos 	 * readline source seems to do.
   2013  1.51  christos 	 */
   2014  1.51  christos 	return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
   2015  1.51  christos }
   2016  1.51  christos 
   2017  1.38  christos void
   2018  1.38  christos rl_stuff_char(int c)
   2019  1.38  christos {
   2020  1.38  christos 	char buf[2];
   2021  1.38  christos 
   2022  1.38  christos 	buf[0] = c;
   2023  1.38  christos 	buf[1] = '\0';
   2024  1.38  christos 	el_insertstr(e, buf);
   2025  1.38  christos }
   2026  1.38  christos 
   2027  1.38  christos static int
   2028  1.38  christos _rl_event_read_char(EditLine *el, char *cp)
   2029  1.38  christos {
   2030  1.80  christos 	int	n;
   2031  1.80  christos 	ssize_t num_read = 0;
   2032  1.38  christos 
   2033  1.76  christos 	*cp = '\0';
   2034  1.38  christos 	while (rl_event_hook) {
   2035  1.38  christos 
   2036  1.38  christos 		(*rl_event_hook)();
   2037  1.38  christos 
   2038  1.38  christos #if defined(FIONREAD)
   2039  1.38  christos 		if (ioctl(el->el_infd, FIONREAD, &n) < 0)
   2040  1.38  christos 			return(-1);
   2041  1.38  christos 		if (n)
   2042  1.38  christos 			num_read = read(el->el_infd, cp, 1);
   2043  1.38  christos 		else
   2044  1.38  christos 			num_read = 0;
   2045  1.38  christos #elif defined(F_SETFL) && defined(O_NDELAY)
   2046  1.38  christos 		if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
   2047  1.38  christos 			return(-1);
   2048  1.38  christos 		if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
   2049  1.38  christos 			return(-1);
   2050  1.38  christos 		num_read = read(el->el_infd, cp, 1);
   2051  1.38  christos 		if (fcntl(el->el_infd, F_SETFL, n))
   2052  1.38  christos 			return(-1);
   2053  1.38  christos #else
   2054  1.38  christos 		/* not non-blocking, but what you gonna do? */
   2055  1.38  christos 		num_read = read(el->el_infd, cp, 1);
   2056  1.38  christos 		return(-1);
   2057  1.38  christos #endif
   2058  1.38  christos 
   2059  1.38  christos 		if (num_read < 0 && errno == EAGAIN)
   2060  1.38  christos 			continue;
   2061  1.38  christos 		if (num_read == 0)
   2062  1.38  christos 			continue;
   2063  1.38  christos 		break;
   2064  1.38  christos 	}
   2065  1.38  christos 	if (!rl_event_hook)
   2066  1.38  christos 		el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
   2067  1.80  christos 	return (int)num_read;
   2068   1.1  christos }
   2069  1.49  christos 
   2070  1.49  christos static void
   2071  1.49  christos _rl_update_pos(void)
   2072  1.49  christos {
   2073  1.49  christos 	const LineInfo *li = el_line(e);
   2074  1.49  christos 
   2075  1.80  christos 	rl_point = (int)(li->cursor - li->buffer);
   2076  1.80  christos 	rl_end = (int)(li->lastchar - li->buffer);
   2077  1.49  christos }
   2078  1.70  christos 
   2079  1.70  christos void
   2080  1.70  christos rl_get_screen_size(int *rows, int *cols)
   2081  1.70  christos {
   2082  1.70  christos 	if (rows)
   2083  1.70  christos 		el_get(e, EL_GETTC, "li", rows);
   2084  1.70  christos 	if (cols)
   2085  1.70  christos 		el_get(e, EL_GETTC, "co", cols);
   2086  1.70  christos }
   2087  1.70  christos 
   2088  1.70  christos void
   2089  1.70  christos rl_set_screen_size(int rows, int cols)
   2090  1.70  christos {
   2091  1.70  christos 	char buf[64];
   2092  1.70  christos 	(void)snprintf(buf, sizeof(buf), "%d", rows);
   2093  1.70  christos 	el_set(e, EL_SETTC, "li", buf);
   2094  1.70  christos 	(void)snprintf(buf, sizeof(buf), "%d", cols);
   2095  1.70  christos 	el_set(e, EL_SETTC, "co", buf);
   2096  1.70  christos }
   2097  1.70  christos 
   2098  1.71  christos char **
   2099  1.71  christos rl_completion_matches(const char *str, rl_compentry_func_t *fun)
   2100  1.71  christos {
   2101  1.71  christos 	size_t len, max, i, j, min;
   2102  1.71  christos 	char **list, *match, *a, *b;
   2103  1.71  christos 
   2104  1.71  christos 	len = 1;
   2105  1.71  christos 	max = 10;
   2106  1.71  christos 	if ((list = malloc(max * sizeof(*list))) == NULL)
   2107  1.71  christos 		return NULL;
   2108  1.71  christos 
   2109  1.71  christos 	while ((match = (*fun)(str, (int)(len - 1))) != NULL) {
   2110  1.83  christos 		list[len++] = match;
   2111  1.71  christos 		if (len == max) {
   2112  1.71  christos 			char **nl;
   2113  1.71  christos 			max += 10;
   2114  1.71  christos 			if ((nl = realloc(list, max * sizeof(*nl))) == NULL)
   2115  1.71  christos 				goto out;
   2116  1.71  christos 			list = nl;
   2117  1.71  christos 		}
   2118  1.71  christos 	}
   2119  1.71  christos 	if (len == 1)
   2120  1.71  christos 		goto out;
   2121  1.71  christos 	list[len] = NULL;
   2122  1.71  christos 	if (len == 2) {
   2123  1.71  christos 		if ((list[0] = strdup(list[1])) == NULL)
   2124  1.71  christos 			goto out;
   2125  1.71  christos 		return list;
   2126  1.71  christos 	}
   2127  1.71  christos 	qsort(&list[1], len - 1, sizeof(*list),
   2128  1.71  christos 	    (int (*)(const void *, const void *)) strcmp);
   2129  1.71  christos 	min = SIZE_T_MAX;
   2130  1.71  christos 	for (i = 1, a = list[i]; i < len - 1; i++, a = b) {
   2131  1.71  christos 		b = list[i + 1];
   2132  1.71  christos 		for (j = 0; a[j] && a[j] == b[j]; j++)
   2133  1.71  christos 			continue;
   2134  1.71  christos 		if (min > j)
   2135  1.71  christos 			min = j;
   2136  1.71  christos 	}
   2137  1.71  christos 	if (min == 0 && *str) {
   2138  1.71  christos 		if ((list[0] = strdup(str)) == NULL)
   2139  1.71  christos 			goto out;
   2140  1.71  christos 	} else {
   2141  1.71  christos 		if ((list[0] = malloc(min + 1)) == NULL)
   2142  1.71  christos 			goto out;
   2143  1.71  christos 		(void)memcpy(list[0], list[1], min);
   2144  1.71  christos 		list[0][min] = '\0';
   2145  1.71  christos 	}
   2146  1.71  christos 	return list;
   2147  1.71  christos 
   2148  1.71  christos out:
   2149  1.71  christos 	free(list);
   2150  1.71  christos 	return NULL;
   2151  1.71  christos }
   2152  1.71  christos 
   2153  1.70  christos char *
   2154  1.70  christos rl_filename_completion_function (const char *text, int state)
   2155  1.70  christos {
   2156  1.70  christos 	return fn_filename_completion_function(text, state);
   2157  1.70  christos }
   2158  1.70  christos 
   2159  1.73  christos void
   2160  1.73  christos rl_forced_update_display(void)
   2161  1.73  christos {
   2162  1.74  christos 	el_set(e, EL_REFRESH);
   2163  1.73  christos }
   2164  1.73  christos 
   2165  1.70  christos int
   2166  1.70  christos _rl_abort_internal(void)
   2167  1.70  christos {
   2168  1.70  christos 	el_beep(e);
   2169  1.70  christos 	longjmp(topbuf, 1);
   2170  1.70  christos 	/*NOTREACHED*/
   2171  1.70  christos }
   2172  1.70  christos 
   2173  1.70  christos int
   2174  1.70  christos _rl_qsort_string_compare(char **s1, char **s2)
   2175  1.70  christos {
   2176  1.70  christos 	return strcoll(*s1, *s2);
   2177  1.70  christos }
   2178  1.70  christos 
   2179  1.85  christos HISTORY_STATE *
   2180  1.85  christos history_get_history_state(void)
   2181  1.85  christos {
   2182  1.85  christos 	HISTORY_STATE *hs;
   2183  1.85  christos 
   2184  1.85  christos 	if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL)
   2185  1.85  christos 		return (NULL);
   2186  1.85  christos 	hs->length = history_length;
   2187  1.85  christos 	return (hs);
   2188  1.85  christos }
   2189  1.85  christos 
   2190  1.70  christos int
   2191  1.70  christos /*ARGSUSED*/
   2192  1.70  christos rl_kill_text(int from, int to)
   2193  1.70  christos {
   2194  1.70  christos 	return 0;
   2195  1.70  christos }
   2196  1.70  christos 
   2197  1.70  christos Keymap
   2198  1.70  christos rl_make_bare_keymap(void)
   2199  1.70  christos {
   2200  1.70  christos 	return NULL;
   2201  1.70  christos }
   2202  1.70  christos 
   2203  1.70  christos Keymap
   2204  1.70  christos rl_get_keymap(void)
   2205  1.70  christos {
   2206  1.70  christos 	return NULL;
   2207  1.70  christos }
   2208  1.70  christos 
   2209  1.70  christos void
   2210  1.70  christos /*ARGSUSED*/
   2211  1.70  christos rl_set_keymap(Keymap k)
   2212  1.70  christos {
   2213  1.70  christos }
   2214  1.70  christos 
   2215  1.70  christos int
   2216  1.70  christos /*ARGSUSED*/
   2217  1.70  christos rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k)
   2218  1.70  christos {
   2219  1.70  christos 	return 0;
   2220  1.70  christos }
   2221  1.70  christos 
   2222  1.70  christos int
   2223  1.70  christos /*ARGSUSED*/
   2224  1.85  christos rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k)
   2225  1.70  christos {
   2226  1.70  christos 	return 0;
   2227  1.70  christos }
   2228  1.85  christos 
   2229  1.85  christos /* unsupported, but needed by python */
   2230  1.85  christos void
   2231  1.85  christos rl_cleanup_after_signal(void)
   2232  1.85  christos {
   2233  1.85  christos }
   2234