/OpenIPMI-2.0.18/libedit/readline.c
C | 1795 lines | 1743 code | 10 blank | 42 comment | 2 complexity | 599bd4b735b27280a67f0f385eda2dd9 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.1
- /* $NetBSD: readline.c,v 1.58 2005/07/14 15:00:58 christos Exp $ */
- /*-
- * Copyright (c) 1997 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Jaromir Dolecek.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
- /* AIX requires this to be the first thing in the file. */
- #if defined (_AIX) && !defined (__GNUC__)
- #pragma alloca
- #endif
- #include "sys.h"
- #ifdef __GNUC__
- # undef alloca
- # define alloca(n) __builtin_alloca (n)
- #else
- # ifdef HAVE_ALLOCA_H
- # include <alloca.h>
- # else
- # ifndef _AIX
- extern char *alloca ();
- # endif
- # endif
- #endif
- #if !defined(lint) && !defined(SCCSID)
- __RCSID("$NetBSD: readline.c,v 1.58 2005/07/14 15:00:58 christos Exp $");
- #endif /* not lint && not SCCSID */
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <stdio.h>
- #include <dirent.h>
- #include <string.h>
- #include <pwd.h>
- #include <ctype.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <limits.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <vis.h>
- #include "el.h"
- #include "fcns.h" /* for EL_NUM_FCNS */
- #include "histedit.h"
- #include "editline/readline.h"
- #include "filecomplete.h"
- /* for rl_complete() */
- #define TAB '\r'
- /* see comment at the #ifdef for sense of this */
- /* #define GDB_411_HACK */
- /* readline compatibility stuff - look at readline sources/documentation */
- /* to see what these variables mean */
- const char *rl_library_version = "EditLine wrapper";
- static char empty[] = { '\0' };
- static char expand_chars[] = { ' ', '\t', '\n', '=', '(', '\0' };
- static char break_chars[] = { ' ', '\t', '\n', '"', '\\', '\'', '`', '@', '$',
- '>', '<', '=', ';', '|', '&', '{', '(', '\0' };
- char *rl_readline_name = empty;
- FILE *rl_instream = NULL;
- FILE *rl_outstream = NULL;
- int rl_point = 0;
- int rl_end = 0;
- char *rl_line_buffer = NULL;
- VCPFunction *rl_linefunc = NULL;
- int rl_done = 0;
- VFunction *rl_event_hook = NULL;
- int history_base = 1; /* probably never subject to change */
- int history_length = 0;
- int max_input_history = 0;
- char history_expansion_char = '!';
- char history_subst_char = '^';
- char *history_no_expand_chars = expand_chars;
- Function *history_inhibit_expansion_function = NULL;
- char *history_arg_extract(int start, int end, const char *str);
- int rl_inhibit_completion = 0;
- int rl_attempted_completion_over = 0;
- char *rl_basic_word_break_characters = break_chars;
- char *rl_completer_word_break_characters = NULL;
- char *rl_completer_quote_characters = NULL;
- Function *rl_completion_entry_function = NULL;
- CPPFunction *rl_attempted_completion_function = NULL;
- Function *rl_pre_input_hook = NULL;
- Function *rl_startup1_hook = NULL;
- Function *rl_getc_function = NULL;
- char *rl_terminal_name = NULL;
- int rl_already_prompted = 0;
- int rl_filename_completion_desired = 0;
- int rl_ignore_completion_duplicates = 0;
- int rl_catch_signals = 1;
- VFunction *rl_redisplay_function = NULL;
- Function *rl_startup_hook = NULL;
- VFunction *rl_completion_display_matches_hook = NULL;
- VFunction *rl_prep_term_function = NULL;
- VFunction *rl_deprep_term_function = NULL;
- /*
- * The current prompt string.
- */
- char *rl_prompt = NULL;
- /*
- * This is set to character indicating type of completion being done by
- * rl_complete_internal(); this is available for application completion
- * functions.
- */
- int rl_completion_type = 0;
- /*
- * If more than this number of items results from query for possible
- * completions, we ask user if they are sure to really display the list.
- */
- int rl_completion_query_items = 100;
- /*
- * List of characters which are word break characters, but should be left
- * in the parsed text when it is passed to the completion function.
- * Shell uses this to help determine what kind of completing to do.
- */
- char *rl_special_prefixes = NULL;
- /*
- * This is the character appended to the completed words if at the end of
- * the line. Default is ' ' (a space).
- */
- int rl_completion_append_character = ' ';
- /* stuff below is used internally by libedit for readline emulation */
- static History *h = NULL;
- static EditLine *e = NULL;
- static Function *map[256];
- /* internal functions */
- static unsigned char _el_rl_complete(EditLine *, int);
- static unsigned char _el_rl_tstp(EditLine *, int);
- static char *_get_prompt(EditLine *);
- static HIST_ENTRY *_move_history(int);
- static int _history_expand_command(const char *, size_t, size_t,
- char **);
- static char *_rl_compat_sub(const char *, const char *,
- const char *, int);
- static int _rl_event_read_char(EditLine *, char *);
- static void _rl_update_pos(void);
- /* ARGSUSED */
- static char *
- _get_prompt(EditLine *el __attribute__((__unused__)))
- {
- rl_already_prompted = 1;
- return (rl_prompt);
- }
- /*
- * generic function for moving around history
- */
- static HIST_ENTRY *
- _move_history(int op)
- {
- HistEvent ev;
- static HIST_ENTRY rl_he;
- if (history(h, &ev, op) != 0)
- return (HIST_ENTRY *) NULL;
- rl_he.line = ev.str;
- rl_he.data = (histdata_t) &(ev.num);
- return (&rl_he);
- }
- /*
- * READLINE compatibility stuff
- */
- /*
- * initialize rl compat stuff
- */
- int
- rl_initialize(void)
- {
- HistEvent ev;
- const LineInfo *li;
- int editmode = 1;
- struct termios t;
- if (e != NULL)
- el_end(e);
- if (h != NULL)
- history_end(h);
- if (!rl_instream)
- rl_instream = stdin;
- if (!rl_outstream)
- rl_outstream = stdout;
- /*
- * See if we don't really want to run the editor
- */
- if (tcgetattr(fileno(rl_instream), &t) != -1 && (t.c_lflag & ECHO) == 0)
- editmode = 0;
- e = el_init(rl_readline_name, rl_instream, rl_outstream, stderr);
- if (!editmode)
- el_set(e, EL_EDITMODE, 0);
- h = history_init();
- if (!e || !h)
- return (-1);
- history(h, &ev, H_SETSIZE, INT_MAX); /* unlimited */
- history_length = 0;
- max_input_history = INT_MAX;
- el_set(e, EL_HIST, history, h);
- /* for proper prompt printing in readline() */
- rl_prompt = strdup("");
- if (rl_prompt == NULL) {
- history_end(h);
- el_end(e);
- return -1;
- }
- el_set(e, EL_PROMPT, _get_prompt);
- el_set(e, EL_SIGNAL, rl_catch_signals);
- /* set default mode to "emacs"-style and read setting afterwards */
- /* so this can be overriden */
- el_set(e, EL_EDITOR, "emacs");
- if (rl_terminal_name != NULL)
- el_set(e, EL_TERMINAL, rl_terminal_name);
- else
- el_get(e, EL_TERMINAL, &rl_terminal_name);
- /*
- * Word completion - this has to go AFTER rebinding keys
- * to emacs-style.
- */
- el_set(e, EL_ADDFN, "rl_complete",
- "ReadLine compatible completion function",
- _el_rl_complete);
- el_set(e, EL_BIND, "^I", "rl_complete", NULL);
- /*
- * Send TSTP when ^Z is pressed.
- */
- el_set(e, EL_ADDFN, "rl_tstp",
- "ReadLine compatible suspend function",
- _el_rl_tstp);
- el_set(e, EL_BIND, "^Z", "rl_tstp", NULL);
-
- /* read settings from configuration file */
- el_source(e, NULL);
- /*
- * Unfortunately, some applications really do use rl_point
- * and rl_line_buffer directly.
- */
- li = el_line(e);
- /* a cheesy way to get rid of const cast. */
- rl_line_buffer = memchr(li->buffer, *li->buffer, 1);
- _rl_update_pos();
- if (rl_startup_hook)
- (*rl_startup_hook)(NULL, 0);
- return (0);
- }
- /*
- * read one line from input stream and return it, chomping
- * trailing newline (if there is any)
- */
- char *
- readline(const char *prompt)
- {
- HistEvent ev;
- int count;
- const char *ret;
- char *buf;
- static int used_event_hook;
- if (e == NULL || h == NULL)
- rl_initialize();
- rl_done = 0;
- /* update prompt accordingly to what has been passed */
- if (!prompt)
- prompt = "";
- if (strcmp(rl_prompt, prompt) != 0) {
- free(rl_prompt);
- rl_prompt = strdup(prompt);
- if (rl_prompt == NULL)
- return NULL;
- }
- if (rl_pre_input_hook)
- (*rl_pre_input_hook)(NULL, 0);
- if (rl_event_hook && !(e->el_flags&NO_TTY)) {
- el_set(e, EL_GETCFN, _rl_event_read_char);
- used_event_hook = 1;
- }
- if (!rl_event_hook && used_event_hook) {
- el_set(e, EL_GETCFN, EL_BUILTIN_GETCFN);
- used_event_hook = 0;
- }
- rl_already_prompted = 0;
- /* get one line from input stream */
- ret = el_gets(e, &count);
- if (ret && count > 0) {
- int lastidx;
- buf = strdup(ret);
- if (buf == NULL)
- return NULL;
- lastidx = count - 1;
- if (buf[lastidx] == '\n')
- buf[lastidx] = '\0';
- } else
- buf = NULL;
- history(h, &ev, H_GETSIZE);
- history_length = ev.num;
- return buf;
- }
- /*
- * history functions
- */
- /*
- * is normally called before application starts to use
- * history expansion functions
- */
- void
- using_history(void)
- {
- if (h == NULL || e == NULL)
- rl_initialize();
- }
- /*
- * substitute ``what'' with ``with'', returning resulting string; if
- * globally == 1, substitutes all occurrences of what, otherwise only the
- * first one
- */
- static char *
- _rl_compat_sub(const char *str, const char *what, const char *with,
- int globally)
- {
- const char *s;
- char *r, *result;
- size_t len, with_len, what_len;
- len = strlen(str);
- with_len = strlen(with);
- what_len = strlen(what);
- /* calculate length we need for result */
- s = str;
- while (*s) {
- if (*s == *what && !strncmp(s, what, what_len)) {
- len += with_len - what_len;
- if (!globally)
- break;
- s += what_len;
- } else
- s++;
- }
- r = result = malloc(len + 1);
- if (result == NULL)
- return NULL;
- s = str;
- while (*s) {
- if (*s == *what && !strncmp(s, what, what_len)) {
- (void)strncpy(r, with, with_len);
- r += with_len;
- s += what_len;
- if (!globally) {
- (void)strcpy(r, s);
- return(result);
- }
- } else
- *r++ = *s++;
- }
- *r = 0;
- return(result);
- }
- static char *last_search_pat; /* last !?pat[?] search pattern */
- static char *last_search_match; /* last !?pat[?] that matched */
- const char *
- get_history_event(const char *cmd, int *cindex, int qchar)
- {
- int idx, sign, sub, num, begin, ret;
- size_t len;
- char *pat;
- const char *rptr;
- HistEvent ev;
- idx = *cindex;
- if (cmd[idx++] != history_expansion_char)
- return(NULL);
- /* find out which event to take */
- if (cmd[idx] == history_expansion_char || cmd[idx] == 0) {
- if (history(h, &ev, H_FIRST) != 0)
- return(NULL);
- *cindex = cmd[idx]? (idx + 1):idx;
- return(ev.str);
- }
- sign = 0;
- if (cmd[idx] == '-') {
- sign = 1;
- idx++;
- }
- if ('0' <= cmd[idx] && cmd[idx] <= '9') {
- HIST_ENTRY *rl_he;
- num = 0;
- while (cmd[idx] && '0' <= cmd[idx] && cmd[idx] <= '9') {
- num = num * 10 + cmd[idx] - '0';
- idx++;
- }
- if (sign)
- num = history_length - num + 1;
- if (!(rl_he = history_get(num)))
- return(NULL);
- *cindex = idx;
- return(rl_he->line);
- }
- sub = 0;
- if (cmd[idx] == '?') {
- sub = 1;
- idx++;
- }
- begin = idx;
- while (cmd[idx]) {
- if (cmd[idx] == '\n')
- break;
- if (sub && cmd[idx] == '?')
- break;
- if (!sub && (cmd[idx] == ':' || cmd[idx] == ' '
- || cmd[idx] == '\t' || cmd[idx] == qchar))
- break;
- idx++;
- }
- len = idx - begin;
- if (sub && cmd[idx] == '?')
- idx++;
- if (sub && len == 0 && last_search_pat && *last_search_pat)
- pat = last_search_pat;
- else if (len == 0)
- return(NULL);
- else {
- if ((pat = malloc(len + 1)) == NULL)
- return NULL;
- (void)strncpy(pat, cmd + begin, len);
- pat[len] = '\0';
- }
- if (history(h, &ev, H_CURR) != 0) {
- if (pat != last_search_pat)
- free(pat);
- return (NULL);
- }
- num = ev.num;
- if (sub) {
- if (pat != last_search_pat) {
- if (last_search_pat)
- free(last_search_pat);
- last_search_pat = pat;
- }
- ret = history_search(pat, -1);
- } else
- ret = history_search_prefix(pat, -1);
- if (ret == -1) {
- /* restore to end of list on failed search */
- history(h, &ev, H_FIRST);
- (void)fprintf(rl_outstream, "%s: Event not found\n", pat);
- if (pat != last_search_pat)
- free(pat);
- return(NULL);
- }
- if (sub && len) {
- if (last_search_match && last_search_match != pat)
- free(last_search_match);
- last_search_match = pat;
- }
- if (pat != last_search_pat)
- free(pat);
- if (history(h, &ev, H_CURR) != 0)
- return(NULL);
- *cindex = idx;
- rptr = ev.str;
- /* roll back to original position */
- (void)history(h, &ev, H_SET, num);
- return rptr;
- }
- /*
- * the real function doing history expansion - takes as argument command
- * to do and data upon which the command should be executed
- * does expansion the way I've understood readline documentation
- *
- * returns 0 if data was not modified, 1 if it was and 2 if the string
- * should be only printed and not executed; in case of error,
- * returns -1 and *result points to NULL
- * it's callers responsibility to free() string returned in *result
- */
- static int
- _history_expand_command(const char *command, size_t offs, size_t cmdlen,
- char **result)
- {
- char *tmp, *search = NULL, *aptr;
- const char *ptr, *cmd;
- static char *from = NULL, *to = NULL;
- int start, end, idx, has_mods = 0;
- int p_on = 0, g_on = 0;
- *result = NULL;
- aptr = NULL;
- ptr = NULL;
- /* First get event specifier */
- idx = 0;
- if (strchr(":^*$", command[offs + 1])) {
- char str[4];
- /*
- * "!:" is shorthand for "!!:".
- * "!^", "!*" and "!$" are shorthand for
- * "!!:^", "!!:*" and "!!:$" respectively.
- */
- str[0] = str[1] = '!';
- str[2] = '0';
- ptr = get_history_event(str, &idx, 0);
- idx = (command[offs + 1] == ':')? 1:0;
- has_mods = 1;
- } else {
- if (command[offs + 1] == '#') {
- /* use command so far */
- if ((aptr = malloc(offs + 1)) == NULL)
- return -1;
- (void)strncpy(aptr, command, offs);
- aptr[offs] = '\0';
- idx = 1;
- } else {
- int qchar;
- qchar = (offs > 0 && command[offs - 1] == '"')? '"':0;
- ptr = get_history_event(command + offs, &idx, qchar);
- }
- has_mods = command[offs + idx] == ':';
- }
- if (ptr == NULL && aptr == NULL)
- return(-1);
- if (!has_mods) {
- *result = strdup(aptr? aptr : ptr);
- if (aptr)
- free(aptr);
- return(1);
- }
- cmd = command + offs + idx + 1;
- /* Now parse any word designators */
- if (*cmd == '%') /* last word matched by ?pat? */
- tmp = strdup(last_search_match? last_search_match:"");
- else if (strchr("^*$-0123456789", *cmd)) {
- start = end = -1;
- if (*cmd == '^')
- start = end = 1, cmd++;
- else if (*cmd == '$')
- start = -1, cmd++;
- else if (*cmd == '*')
- start = 1, cmd++;
- else if (*cmd == '-' || isdigit((unsigned char) *cmd)) {
- start = 0;
- while (*cmd && '0' <= *cmd && *cmd <= '9')
- start = start * 10 + *cmd++ - '0';
- if (*cmd == '-') {
- if (isdigit((unsigned char) cmd[1])) {
- cmd++;
- end = 0;
- while (*cmd && '0' <= *cmd && *cmd <= '9')
- end = end * 10 + *cmd++ - '0';
- } else if (cmd[1] == '$') {
- cmd += 2;
- end = -1;
- } else {
- cmd++;
- end = -2;
- }
- } else if (*cmd == '*')
- end = -1, cmd++;
- else
- end = start;
- }
- tmp = history_arg_extract(start, end, aptr? aptr:ptr);
- if (tmp == NULL) {
- (void)fprintf(rl_outstream, "%s: Bad word specifier",
- command + offs + idx);
- if (aptr)
- free(aptr);
- return(-1);
- }
- } else
- tmp = strdup(aptr? aptr:ptr);
- if (aptr)
- free(aptr);
- if (*cmd == 0 || (cmd - (command + offs) >= cmdlen)) {
- *result = tmp;
- return(1);
- }
- for (; *cmd; cmd++) {
- if (*cmd == ':')
- continue;
- else if (*cmd == 'h') { /* remove trailing path */
- if ((aptr = strrchr(tmp, '/')) != NULL)
- *aptr = 0;
- } else if (*cmd == 't') { /* remove leading path */
- if ((aptr = strrchr(tmp, '/')) != NULL) {
- aptr = strdup(aptr + 1);
- free(tmp);
- tmp = aptr;
- }
- } else if (*cmd == 'r') { /* remove trailing suffix */
- if ((aptr = strrchr(tmp, '.')) != NULL)
- *aptr = 0;
- } else if (*cmd == 'e') { /* remove all but suffix */
- if ((aptr = strrchr(tmp, '.')) != NULL) {
- aptr = strdup(aptr);
- free(tmp);
- tmp = aptr;
- }
- } else if (*cmd == 'p') /* print only */
- p_on = 1;
- else if (*cmd == 'g')
- g_on = 2;
- else if (*cmd == 's' || *cmd == '&') {
- char *what, *with, delim;
- size_t len, from_len;
- size_t size;
- if (*cmd == '&' && (from == NULL || to == NULL))
- continue;
- else if (*cmd == 's') {
- delim = *(++cmd), cmd++;
- size = 16;
- what = realloc(from, size);
- if (what == NULL) {
- free(from);
- return 0;
- }
- len = 0;
- for (; *cmd && *cmd != delim; cmd++) {
- if (*cmd == '\\' && cmd[1] == delim)
- cmd++;
- if (len >= size) {
- char *nwhat;
- nwhat = realloc(what,
- (size <<= 1));
- if (nwhat == NULL) {
- free(what);
- return 0;
- }
- what = nwhat;
- }
- what[len++] = *cmd;
- }
- what[len] = '\0';
- from = what;
- if (*what == '\0') {
- free(what);
- if (search) {
- from = strdup(search);
- if (from == NULL)
- return 0;
- } else {
- from = NULL;
- return (-1);
- }
- }
- cmd++; /* shift after delim */
- if (!*cmd)
- continue;
- size = 16;
- with = realloc(to, size);
- if (with == NULL) {
- free(to);
- return -1;
- }
- len = 0;
- from_len = strlen(from);
- for (; *cmd && *cmd != delim; cmd++) {
- if (len + from_len + 1 >= size) {
- char *nwith;
- size += from_len + 1;
- nwith = realloc(with, size);
- if (nwith == NULL) {
- free(with);
- return -1;
- }
- with = nwith;
- }
- if (*cmd == '&') {
- /* safe */
- (void)strcpy(&with[len], from);
- len += from_len;
- continue;
- }
- if (*cmd == '\\'
- && (*(cmd + 1) == delim
- || *(cmd + 1) == '&'))
- cmd++;
- with[len++] = *cmd;
- }
- with[len] = '\0';
- to = with;
- }
- aptr = _rl_compat_sub(tmp, from, to, g_on);
- if (aptr) {
- free(tmp);
- tmp = aptr;
- }
- g_on = 0;
- }
- }
- *result = tmp;
- return (p_on? 2:1);
- }
- /*
- * csh-style history expansion
- */
- int
- history_expand(char *str, char **output)
- {
- int ret = 0;
- size_t idx, i, size;
- char *tmp, *result;
- if (h == NULL || e == NULL)
- rl_initialize();
- if (history_expansion_char == 0) {
- *output = strdup(str);
- return(0);
- }
- *output = NULL;
- if (str[0] == history_subst_char) {
- /* ^foo^foo2^ is equivalent to !!:s^foo^foo2^ */
- *output = malloc(strlen(str) + 4 + 1);
- if (*output == NULL)
- return 0;
- (*output)[0] = (*output)[1] = history_expansion_char;
- (*output)[2] = ':';
- (*output)[3] = 's';
- (void)strcpy((*output) + 4, str);
- str = *output;
- } else {
- *output = strdup(str);
- if (*output == NULL)
- return 0;
- }
- #define ADD_STRING(what, len) \
- { \
- if (idx + len + 1 > size) { \
- char *nresult = realloc(result, (size += len + 1));\
- if (nresult == NULL) { \
- free(*output); \
- return 0; \
- } \
- result = nresult; \
- } \
- (void)strncpy(&result[idx], what, len); \
- idx += len; \
- result[idx] = '\0'; \
- }
- result = NULL;
- size = idx = 0;
- for (i = 0; str[i];) {
- int qchar, loop_again;
- size_t len, start, j;
- qchar = 0;
- loop_again = 1;
- start = j = i;
- loop:
- for (; str[j]; j++) {
- if (str[j] == '\\' &&
- str[j + 1] == history_expansion_char) {
- (void)strcpy(&str[j], &str[j + 1]);
- continue;
- }
- if (!loop_again) {
- if (isspace((unsigned char) str[j])
- || str[j] == qchar)
- break;
- }
- if (str[j] == history_expansion_char
- && !strchr(history_no_expand_chars, str[j + 1])
- && (!history_inhibit_expansion_function ||
- (*history_inhibit_expansion_function)(str,
- (int)j) == 0))
- break;
- }
- if (str[j] && loop_again) {
- i = j;
- qchar = (j > 0 && str[j - 1] == '"' )? '"':0;
- j++;
- if (str[j] == history_expansion_char)
- j++;
- loop_again = 0;
- goto loop;
- }
- len = i - start;
- tmp = &str[start];
- ADD_STRING(tmp, len);
- if (str[i] == '\0' || str[i] != history_expansion_char) {
- len = j - i;
- tmp = &str[i];
- ADD_STRING(tmp, len);
- if (start == 0)
- ret = 0;
- else
- ret = 1;
- break;
- }
- ret = _history_expand_command (str, i, (j - i), &tmp);
- if (ret > 0 && tmp) {
- len = strlen(tmp);
- ADD_STRING(tmp, len);
- free(tmp);
- }
- i = j;
- }
- /* ret is 2 for "print only" option */
- if (ret == 2) {
- add_history(result);
- #ifdef GDB_411_HACK
- /* gdb 4.11 has been shipped with readline, where */
- /* history_expand() returned -1 when the line */
- /* should not be executed; in readline 2.1+ */
- /* it should return 2 in such a case */
- ret = -1;
- #endif
- }
- free(*output);
- *output = result;
- return (ret);
- }
- /*
- * Return a string consisting of arguments of "str" from "start" to "end".
- */
- char *
- history_arg_extract(int start, int end, const char *str)
- {
- size_t i, len, max;
- char **arr, *result;
- arr = history_tokenize(str);
- if (!arr)
- return(NULL);
- if (arr && *arr == NULL) {
- free(arr);
- return(NULL);
- }
- for (max = 0; arr[max]; max++)
- continue;
- max--;
- if (start == '$')
- start = max;
- if (end == '$')
- end = max;
- if (end < 0)
- end = max + end + 1;
- if (start < 0)
- start = end;
- if (start < 0 || end < 0 || start > max || end > max || start > end)
- return(NULL);
- for (i = start, len = 0; i <= end; i++)
- len += strlen(arr[i]) + 1;
- len++;
- result = malloc(len);
- if (result == NULL)
- return NULL;
- for (i = start, len = 0; i <= end; i++) {
- (void)strcpy(result + len, arr[i]);
- len += strlen(arr[i]);
- if (i < end)
- result[len++] = ' ';
- }
- result[len] = 0;
- for (i = 0; arr[i]; i++)
- free(arr[i]);
- free(arr);
- return(result);
- }
- /*
- * Parse the string into individual tokens,
- * similar to how shell would do it.
- */
- char **
- history_tokenize(const char *str)
- {
- int size = 1, idx = 0, i, start;
- size_t len;
- char **result = NULL, *temp, delim = '\0';
- for (i = 0; str[i];) {
- while (isspace((unsigned char) str[i]))
- i++;
- start = i;
- for (; str[i];) {
- if (str[i] == '\\') {
- if (str[i+1] != '\0')
- i++;
- } else if (str[i] == delim)
- delim = '\0';
- else if (!delim &&
- (isspace((unsigned char) str[i]) ||
- strchr("()<>;&|$", str[i])))
- break;
- else if (!delim && strchr("'`\"", str[i]))
- delim = str[i];
- if (str[i])
- i++;
- }
- if (idx + 2 >= size) {
- char **nresult;
- size <<= 1;
- nresult = realloc(result, size * sizeof(char *));
- if (nresult == NULL) {
- free(result);
- return NULL;
- }
- result = nresult;
- }
- len = i - start;
- temp = malloc(len + 1);
- if (temp == NULL) {
- for (i = 0; i < idx; i++)
- free(result[i]);
- free(result);
- return NULL;
- }
- (void)strncpy(temp, &str[start], len);
- temp[len] = '\0';
- result[idx++] = temp;
- result[idx] = NULL;
- if (str[i])
- i++;
- }
- return (result);
- }
- /*
- * limit size of history record to ``max'' events
- */
- void
- stifle_history(int max)
- {
- HistEvent ev;
- if (h == NULL || e == NULL)
- rl_initialize();
- if (history(h, &ev, H_SETSIZE, max) == 0)
- max_input_history = max;
- }
- /*
- * "unlimit" size of history - set the limit to maximum allowed int value
- */
- int
- unstifle_history(void)
- {
- HistEvent ev;
- int omax;
- history(h, &ev, H_SETSIZE, INT_MAX);
- omax = max_input_history;
- max_input_history = INT_MAX;
- return (omax); /* some value _must_ be returned */
- }
- int
- history_is_stifled(void)
- {
- /* cannot return true answer */
- return (max_input_history != INT_MAX);
- }
- /*
- * read history from a file given
- */
- int
- read_history(const char *filename)
- {
- HistEvent ev;
- if (h == NULL || e == NULL)
- rl_initialize();
- return (history(h, &ev, H_LOAD, filename));
- }
- /*
- * write history to a file given
- */
- int
- write_history(const char *filename)
- {
- HistEvent ev;
- if (h == NULL || e == NULL)
- rl_initialize();
- return (history(h, &ev, H_SAVE, filename));
- }
- /*
- * returns history ``num''th event
- *
- * returned pointer points to static variable
- */
- HIST_ENTRY *
- history_get(int num)
- {
- static HIST_ENTRY she;
- HistEvent ev;
- int curr_num;
- if (h == NULL || e == NULL)
- rl_initialize();
- /* save current position */
- if (history(h, &ev, H_CURR) != 0)
- return (NULL);
- curr_num = ev.num;
- /* start from most recent */
- if (history(h, &ev, H_FIRST) != 0)
- return (NULL); /* error */
- /* look backwards for event matching specified offset */
- if (history(h, &ev, H_NEXT_EVENT, num))
- return (NULL);
- she.line = ev.str;
- she.data = NULL;
- /* restore pointer to where it was */
- (void)history(h, &ev, H_SET, curr_num);
- return (&she);
- }
- /*
- * add the line to history table
- */
- int
- add_history(const char *line)
- {
- HistEvent ev;
- if (h == NULL || e == NULL)
- rl_initialize();
- (void)history(h, &ev, H_ENTER, line);
- if (history(h, &ev, H_GETSIZE) == 0)
- history_length = ev.num;
- return (!(history_length > 0)); /* return 0 if all is okay */
- }
- /*
- * remove the specified entry from the history list and return it.
- */
- HIST_ENTRY *
- remove_history(int num)
- {
- static HIST_ENTRY she;
- HistEvent ev;
- if (h == NULL || e == NULL)
- rl_initialize();
- if (history(h, &ev, H_DEL, num) != 0)
- return NULL;
- she.line = ev.str;
- she.data = NULL;
- return &she;
- }
- /*
- * clear the history list - delete all entries
- */
- void
- clear_history(void)
- {
- HistEvent ev;
- history(h, &ev, H_CLEAR);
- }
- /*
- * returns offset of the current history event
- */
- int
- where_history(void)
- {
- HistEvent ev;
- int curr_num, off;
- if (history(h, &ev, H_CURR) != 0)
- return (0);
- curr_num = ev.num;
- history(h, &ev, H_FIRST);
- off = 1;
- while (ev.num != curr_num && history(h, &ev, H_NEXT) == 0)
- off++;
- return (off);
- }
- /*
- * returns current history event or NULL if there is no such event
- */
- HIST_ENTRY *
- current_history(void)
- {
- return (_move_history(H_CURR));
- }
- /*
- * returns total number of bytes history events' data are using
- */
- int
- history_total_bytes(void)
- {
- HistEvent ev;
- int curr_num, size;
- if (history(h, &ev, H_CURR) != 0)
- return (-1);
- curr_num = ev.num;
- history(h, &ev, H_FIRST);
- size = 0;
- do
- size += strlen(ev.str);
- while (history(h, &ev, H_NEXT) == 0);
- /* get to the same position as before */
- history(h, &ev, H_PREV_EVENT, curr_num);
- return (size);
- }
- /*
- * sets the position in the history list to ``pos''
- */
- int
- history_set_pos(int pos)
- {
- HistEvent ev;
- int curr_num;
- if (pos > history_length || pos < 0)
- return (-1);
- history(h, &ev, H_CURR);
- curr_num = ev.num;
- if (history(h, &ev, H_SET, pos)) {
- history(h, &ev, H_SET, curr_num);
- return(-1);
- }
- return (0);
- }
- /*
- * returns previous event in history and shifts pointer accordingly
- */
- HIST_ENTRY *
- previous_history(void)
- {
- return (_move_history(H_PREV));
- }
- /*
- * returns next event in history and shifts pointer accordingly
- */
- HIST_ENTRY *
- next_history(void)
- {
- return (_move_history(H_NEXT));
- }
- /*
- * searches for first history event containing the str
- */
- int
- history_search(const char *str, int direction)
- {
- HistEvent ev;
- const char *strp;
- int curr_num;
- if (history(h, &ev, H_CURR) != 0)
- return (-1);
- curr_num = ev.num;
- for (;;) {
- if ((strp = strstr(ev.str, str)) != NULL)
- return (int) (strp - ev.str);
- if (history(h, &ev, direction < 0 ? H_NEXT:H_PREV) != 0)
- break;
- }
- history(h, &ev, H_SET, curr_num);
- return (-1);
- }
- /*
- * searches for first history event beginning with str
- */
- int
- history_search_prefix(const char *str, int direction)
- {
- HistEvent ev;
- return (history(h, &ev, direction < 0? H_PREV_STR:H_NEXT_STR, str));
- }
- /*
- * search for event in history containing str, starting at offset
- * abs(pos); continue backward, if pos<0, forward otherwise
- */
- /* ARGSUSED */
- int
- history_search_pos(const char *str,
- int direction __attribute__((__unused__)), int pos)
- {
- HistEvent ev;
- int curr_num, off;
- off = (pos > 0) ? pos : -pos;
- pos = (pos > 0) ? 1 : -1;
- if (history(h, &ev, H_CURR) != 0)
- return (-1);
- curr_num = ev.num;
- if (history_set_pos(off) != 0 || history(h, &ev, H_CURR) != 0)
- return (-1);
- for (;;) {
- if (strstr(ev.str, str))
- return (off);
- if (history(h, &ev, (pos < 0) ? H_PREV : H_NEXT) != 0)
- break;
- }
- /* set "current" pointer back to previous state */
- history(h, &ev, (pos < 0) ? H_NEXT_EVENT : H_PREV_EVENT, curr_num);
- return (-1);
- }
- /********************************/
- /* completion functions */
- char *
- tilde_expand(char *name)
- {
- return fn_tilde_expand(name);
- }
- char *
- filename_completion_function(const char *name, int state)
- {
- return fn_filename_completion_function(name, state);
- }
- /*
- * a completion generator for usernames; returns _first_ username
- * which starts with supplied text
- * text contains a partial username preceded by random character
- * (usually '~'); state is ignored
- * it's callers responsibility to free returned value
- */
- char *
- username_completion_function(const char *text, int state)
- {
- struct passwd *pwd;
- if (text[0] == '\0')
- return (NULL);
- if (*text == '~')
- text++;
- if (state == 0)
- setpwent();
- while ((pwd = getpwent())
- && pwd != NULL && text[0] == pwd->pw_name[0]
- && strcmp(text, pwd->pw_name) == 0);
- if (pwd == NULL) {
- endpwent();
- return (NULL);
- }
- return (strdup(pwd->pw_name));
- }
- /*
- * el-compatible wrapper to send TSTP on ^Z
- */
- /* ARGSUSED */
- static unsigned char
- _el_rl_tstp(EditLine *el __attribute__((__unused__)), int ch __attribute__((__unused__)))
- {
- (void)kill(0, SIGTSTP);
- return CC_NORM;
- }
- /*
- * Display list of strings in columnar format on readline's output stream.
- * 'matches' is list of strings, 'len' is number of strings in 'matches',
- * 'max' is maximum length of string in 'matches'.
- */
- void
- rl_display_match_list(char **matches, int len, int max)
- {
- fn_display_match_list(e, matches, len, max);
- }
- static const char *
- /*ARGSUSED*/
- _rl_completion_append_character_function(const char *dummy
- __attribute__((__unused__)))
- {
- static char buf[2];
- buf[1] = rl_completion_append_character;
- return buf;
- }
- /*
- * complete word at current point
- */
- /* ARGSUSED */
- int
- rl_complete(int ignore __attribute__((__unused__)), int invoking_key)
- {
- if (h == NULL || e == NULL)
- rl_initialize();
- if (rl_inhibit_completion) {
- char arr[2];
- arr[0] = (char)invoking_key;
- arr[1] = '\0';
- el_insertstr(e, arr);
- return (CC_REFRESH);
- }
- /* Just look at how many global variables modify this operation! */
- return fn_complete(e,
- (CPFunction *)rl_completion_entry_function,
- rl_attempted_completion_function,
- rl_basic_word_break_characters, rl_special_prefixes,
- _rl_completion_append_character_function, rl_completion_query_items,
- &rl_completion_type, &rl_attempted_completion_over,
- &rl_point, &rl_end);
- }
- /* ARGSUSED */
- static unsigned char
- _el_rl_complete(EditLine *el __attribute__((__unused__)), int ch)
- {
- return (unsigned char)rl_complete(0, ch);
- }
- /*
- * misc other functions
- */
- /*
- * bind key c to readline-type function func
- */
- int
- rl_bind_key(int c, int func(int, int))
- {
- int retval = -1;
- if (h == NULL || e == NULL)
- rl_initialize();
- if (func == rl_insert) {
- /* XXX notice there is no range checking of ``c'' */
- e->el_map.key[c] = ED_INSERT;
- retval = 0;
- }
- return (retval);
- }
- /*
- * read one key from input - handles chars pushed back
- * to input stream also
- */
- int
- rl_read_key(void)
- {
- char fooarr[2 * sizeof(int)];
- if (e == NULL || h == NULL)
- rl_initialize();
- return (el_getc(e, fooarr));
- }
- /*
- * reset the terminal
- */
- /* ARGSUSED */
- void
- rl_reset_terminal(const char *p __attribute__((__unused__)))
- {
- if (h == NULL || e == NULL)
- rl_initialize();
- el_reset(e);
- }
- /*
- * insert character ``c'' back into input stream, ``count'' times
- */
- int
- rl_insert(int count, int c)
- {
- char arr[2];
- if (h == NULL || e == NULL)
- rl_initialize();
- /* XXX - int -> char conversion can lose on multichars */
- arr[0] = c;
- arr[1] = '\0';
- for (; count > 0; count--)
- el_push(e, arr);
- return (0);
- }
- /*ARGSUSED*/
- int
- rl_newline(int count, int c)
- {
- /*
- * Readline-4.0 appears to ignore the args.
- */
- return rl_insert(1, '\n');
- }
- /*ARGSUSED*/
- static unsigned char
- rl_bind_wrapper(EditLine *el, unsigned char c)
- {
- if (map[c] == NULL)
- return CC_ERROR;
- _rl_update_pos();
- (*map[c])(NULL, c);
- /* If rl_done was set by the above call, deal with it here */
- if (rl_done)
- return CC_EOF;
- return CC_NORM;
- }
- int
- rl_add_defun(const char *name, Function *fun, int c)
- {
- char dest[8];
- if (c >= sizeof(map) / sizeof(map[0]) || c < 0)
- return -1;
- map[(unsigned char)c] = fun;
- el_set(e, EL_ADDFN, name, name, rl_bind_wrapper);
- vis(dest, c, VIS_WHITE|VIS_NOSLASH, 0);
- el_set(e, EL_BIND, dest, name);
- return 0;
- }
- void
- rl_callback_read_char()
- {
- int count = 0, done = 0;
- const char *buf = el_gets(e, &count);
- char *wbuf;
- if (buf == NULL || count-- <= 0)
- return;
- #ifdef CTRL2 /* _AIX */
- if (count == 0 && buf[0] == CTRL2('d'))
- #else
- if (count == 0 && buf[0] == CTRL('d'))
- #endif
- done = 1;
- if (buf[count] == '\n' || buf[count] == '\r')
- done = 2;
- if (done && rl_linefunc != NULL) {
- el_set(e, EL_UNBUFFERED, 0);
- if (done == 2) {
- if ((wbuf = strdup(buf)) != NULL)
- wbuf[count] = '\0';
- } else
- wbuf = NULL;
- (*(void (*)(const char *))rl_linefunc)(wbuf);
- el_set(e, EL_UNBUFFERED, 1);
- }
- }
- void
- rl_callback_handler_install (const char *prompt, VCPFunction *linefunc)
- {
- if (e == NULL) {
- rl_initialize();
- }
- if (rl_prompt)
- free(rl_prompt);
- rl_prompt = prompt ? strdup(strchr(prompt, *prompt)) : NULL;
- rl_linefunc = linefunc;
- el_set(e, EL_UNBUFFERED, 1);
- }
- void
- rl_callback_handler_remove(void)
- {
- el_set(e, EL_UNBUFFERED, 0);
- }
- void
- rl_redisplay(void)
- {
- char a[2];
- #ifdef CTRL2 /* _AIX */
- a[0] = CTRL2('r');
- #else
- a[0] = CTRL('r');
- #endif
- a[1] = '\0';
- el_push(e, a);
- }
- int
- rl_get_previous_history(int count, int key)
- {
- char a[2];
- a[0] = key;
- a[1] = '\0';
- while (count--)
- el_push(e, a);
- return 0;
- }
- void
- /*ARGSUSED*/
- rl_prep_terminal(int meta_flag)
- {
- el_set(e, EL_PREP_TERM, 1);
- }
- void
- rl_deprep_terminal()
- {
- el_set(e, EL_PREP_TERM, 0);
- }
- int
- rl_read_init_file(const char *s)
- {
- return(el_source(e, s));
- }
- int
- rl_parse_and_bind(const char *line)
- {
- const char **argv;
- int argc;
- Tokenizer *tok;
- tok = tok_init(NULL);
- tok_str(tok, line, &argc, &argv);
- argc = el_parse(e, argc, argv);
- tok_end(tok);
- return (argc ? 1 : 0);
- }
- int
- rl_variable_bind(const char *var, const char *value)
- {
- /*
- * The proper return value is undocument, but this is what the
- * readline source seems to do.
- */
- return ((el_set(e, EL_BIND, "", var, value) == -1) ? 1 : 0);
- }
- void
- rl_stuff_char(int c)
- {
- char buf[2];
- buf[0] = c;
- buf[1] = '\0';
- el_insertstr(e, buf);
- }
- static int
- _rl_event_read_char(EditLine *el, char *cp)
- {
- int n, num_read = 0;
- *cp = 0;
- while (rl_event_hook) {
- (*rl_event_hook)();
- #if defined(FIONREAD)
- if (ioctl(el->el_infd, FIONREAD, &n) < 0)
- return(-1);
- if (n)
- num_read = read(el->el_infd, cp, 1);
- else
- num_read = 0;
- #elif defined(F_SETFL) && defined(O_NDELAY)
- if ((n = fcntl(el->el_infd, F_GETFL, 0)) < 0)
- return(-1);
- if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) < 0)
- return(-1);
- num_read = read(el->el_infd, cp, 1);
- if (fcntl(el->el_infd, F_SETFL, n))
- return(-1);
- #else
- /* not non-blocking, but what you gonna do? */
- num_read = read(el->el_infd, cp, 1);
- return(-1);
- #endif
- if (num_read < 0 && errno == EAGAIN)
- continue;
- if (num_read == 0)
- continue;
- break;
- }
- if (!rl_event_hook)
- el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN);
- return(num_read);
- }
- static void
- _rl_update_pos(void)
- {
- const LineInfo *li = el_line(e);
- rl_point = li->cursor - li->buffer;
- rl_end = li->lastchar - li->buffer;
- }