Edit
IABSD.fr/src/lib/libedit/readline.c
asou
- lib/libedit/readline.c
-
/* $OpenBSD: readline.c,v 1.29 2019/08/14 08:31:00 asou Exp $ */ /* $NetBSD: readline.c,v 1.91 2010/08/28 15:44:59 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. * * 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. */ #include "config.h" #include <sys/types.h> #include <sys/stat.h> #include <ctype.h> #include <dirent.h> #include <errno.h> #include <fcntl.h> #include <limits.h> #include <pwd.h> #include <setjmp.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #ifdef HAVE_VIS_H #include <vis.h> #else #include "np/vis.h" #endif #include "readline/readline.h" #include "el.h" #include "fcns.h" #include "filecomplete.h" void rl_prep_terminal(int); void rl_deprep_terminal(void); /* 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"; int rl_readline_version = RL_READLINE_VERSION; 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; KEYMAP_ENTRY_ARRAY emacs_standard_keymap, emacs_meta_keymap, emacs_ctlx_keymap; 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; int (*rl_getc_function)(FILE *) = 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; int readline_echoing_p = 1; int _rl_print_completions_horizontally = 0; VFunction *rl_redisplay_function = NULL; Function *rl_startup_hook = NULL; VFunction *rl_completion_display_matches_hook = NULL; VFunction *rl_prep_term_function = (VFunction *)rl_prep_terminal; VFunction *rl_deprep_term_function = (VFunction *)rl_deprep_terminal; KEYMAP_ENTRY_ARRAY emacs_meta_keymap; /* * 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 = ' '; /* * When the history cursor is on the newest element and next_history() * is called, GNU readline moves the cursor beyond the newest element. * The editline library does not provide data structures to express * that state, so we need a local flag. */ static int current_history_valid = 1; /* stuff below is used internally by libedit for readline emulation */ static History *h = NULL; static EditLine *e = NULL; static Function *map[256]; static jmp_buf topbuf; /* internal functions */ static unsigned char _el_rl_complete(EditLine *, int); static unsigned char _el_rl_tstp(EditLine *, int); static char *_get_prompt(EditLine *); static int _getc_function(EditLine *, wchar_t *); 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 *, wchar_t *); 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 NULL; rl_he.line = ev.str; rl_he.data = NULL; return &rl_he; } /* * read one key from user defined input function */ static int /*ARGSUSED*/ _getc_function(EditLine *el __attribute__((__unused__)), wchar_t *c) { int i; i = (*rl_getc_function)(NULL); if (i == -1) return 0; *c = (wchar_t)i; return 1; } static void _resize_fun(EditLine *el, void *a) { const LineInfo *li; char **ap = a; li = el_line(el); /* a cheesy way to get rid of const cast. */ *ap = memchr(li->buffer, *li->buffer, 1); } static const char _dothistory[] = "/.history"; static const char * _default_history_file(void) { struct passwd *p; static char path[PATH_MAX]; if (*path) return path; if ((p = getpwuid(getuid())) == NULL) return NULL; strlcpy(path, p->pw_dir, PATH_MAX); strlcat(path, _dothistory, PATH_MAX); return path; } /* * READLINE compatibility stuff */ /* * Set the prompt */ int rl_set_prompt(const char *prompt) { char *p; if (!prompt) prompt = ""; if (rl_prompt != NULL && strcmp(rl_prompt, prompt) == 0) return 0; if (rl_prompt) free(rl_prompt); rl_prompt = strdup(prompt); if (rl_prompt == NULL) return -1; while ((p = strchr(rl_prompt, RL_PROMPT_END_IGNORE)) != NULL) *p = RL_PROMPT_START_IGNORE; return 0; } /* * initialize rl compat stuff */ int rl_initialize(void) { HistEvent ev; int editmode = 1; struct termios t; current_history_valid = 1; 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); /* Setup resize function */ el_set(e, EL_RESIZE, _resize_fun, &rl_line_buffer); /* setup getc function if valid */ if (rl_getc_function) el_set(e, EL_GETCFN, _getc_function); /* for proper prompt printing in readline() */ if (rl_set_prompt("") == -1) { history_end(h); el_end(e); return -1; } el_set(e, EL_PROMPT, _get_prompt, RL_PROMPT_START_IGNORE); 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. */ _resize_fun(e, &rl_line_buffer); _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 *p) { HistEvent ev; const char * volatile prompt = p; int count; const char *ret; char *buf; static int used_event_hook; if (e == NULL || h == NULL) rl_initialize(); rl_done = 0; (void)setjmp(topbuf); /* update prompt accordingly to what has been passed */ if (rl_set_prompt(prompt) == -1) 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)strlcpy(r, s, len); 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 the caller's responsibility to free() the 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); if (*result == NULL) return -1; 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' || ((size_t)(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); free(tmp); return 0; } len = 0; for (; *cmd && *cmd != delim; cmd++) { if (*cmd == '\\' && cmd[1] == delim) cmd++; if (len >= size) { char *nwhat; nwhat = reallocarray(what, size, 2); if (nwhat == NULL) { free(what); free(tmp); return 0; } size *= 2; what = nwhat; } what[len++] = *cmd; } what[len] = '\0'; from = what; if (*what == '\0') { free(what); if (search) { from = strdup(search); if (from == NULL) { free(tmp); return 0; } } else { from = NULL; free(tmp); return -1; } } cmd++; /* shift after delim */ if (!*cmd) continue; size = 16; with = realloc(to, size); if (with == NULL) { free(to); free(tmp); 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); free(tmp); return -1; } with = nwith; } if (*cmd == '&') { /* safe */ (void)strlcpy(&with[len], from, size - len); 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^ */ size_t sz = 4 + strlen(str) + 1; *output = malloc(sz); if (*output == NULL) return 0; (*output)[0] = (*output)[1] = history_expansion_char; (*output)[2] = ':'; (*output)[3] = 's'; (void)strlcpy((*output) + 4, str, sz - 4); str = *output; } else { *output = strdup(str); if (*output == NULL) return 0; } #define ADD_STRING(what, len, fr) \ { \ if (idx + len + 1 > size) { \ char *nresult = realloc(result, (size += len + 1));\ if (nresult == NULL) { \ free(*output); \ if (/*CONSTCOND*/fr) \ free(tmp); \ return 0; \ } \ result = nresult; \ } \ (void)strncpy(&result[idx], what, len); \ idx += len; \ result[idx] = '\0'; \ } result = NULL; size = idx = 0; tmp = NULL; 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) { size_t sz = strlen(&str[j]) + 1; (void)strlcpy(&str[j], &str[j + 1], sz); 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; ADD_STRING(&str[start], len, 0); if (str[i] == '\0' || str[i] != history_expansion_char) { len = j - i; ADD_STRING(&str[i], len, 0); 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, 1); } if (tmp) { free(tmp); tmp = NULL; } 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 = NULL; arr = history_tokenize(str); if (!arr) return NULL; if (arr && *arr == NULL) goto out; for (max = 0; arr[max]; max++) continue; max--; if (start == '$') start = (int)max; if (end == '$') end = (int)max; if (end < 0) end = (int)max + end + 1; if (start < 0) start = end; if (start < 0 || end < 0 || (size_t)start > max || (size_t)end > max || start > end) goto out; for (i = start, len = 0; i <= (size_t)end; i++) len += strlen(arr[i]) + 1; len++; max = len; result = malloc(len); if (result == NULL) goto out; for (i = start, len = 0; i <= (size_t)end; i++) { (void)strlcpy(result + len, arr[i], max - len); len += strlen(arr[i]); if (i < (size_t)end) result[len++] = ' '; } result[len] = '\0'; out: for (i = 0; arr[i]; i++) free(arr[i]); free(arr); return result; } /* * Parse the string into individual tokens, * similar to how shell would do it. */ char ** history_tokenize(const char *str) { int size = 1, idx = 0, i, start; size_t len; char **result = NULL, *temp, delim = '\0'; for (i = 0; str[i];) { while (isspace((unsigned char) str[i])) i++; start = i; for (; str[i];) { if (str[i] == '\\') { if (str[i+1] != '\0') i++; } else if (str[i] == delim) delim = '\0'; else if (!delim && (isspace((unsigned char) str[i]) || strchr("()<>;&|$", str[i]))) break; else if (!delim && strchr("'`\"", str[i])) delim = str[i]; if (str[i]) i++; } if (idx + 2 >= size) { char **nresult; nresult = reallocarray(result, size, 2 * sizeof(char *)); if (nresult == NULL) { free(result); return NULL; } size *= 2; 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; HIST_ENTRY *he; int i, len; if (h == NULL || e == NULL) rl_initialize(); len = history_length; if (history(h, &ev, H_SETSIZE, max) == 0) { max_input_history = max; if (max < len) history_base += len - max; for (i = 0; i < len - max; i++) { he = remove_history(0); free(he->data); free((void *)he->line); free(he); } } } /* * "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; } static const char _history_tmp_template[] = "/tmp/.historyXXXXXX"; int history_truncate_file (const char *filename, int nlines) { int ret = 0; FILE *fp, *tp; char template[sizeof(_history_tmp_template)]; char buf[4096]; int fd; char *cp; off_t off; int count = 0; ssize_t left = 0; if (filename == NULL && (filename = _default_history_file()) == NULL) return errno; if ((fp = fopen(filename, "r+")) == NULL) return errno; strlcpy(template, _history_tmp_template, sizeof(template)); if ((fd = mkstemp(template)) == -1) { ret = errno; goto out1; } if ((tp = fdopen(fd, "r+")) == NULL) { close(fd); ret = errno; goto out2; } for(;;) { if (fread(buf, sizeof(buf), 1, fp) != 1) { if (ferror(fp)) { ret = errno; break; } if (fseeko(fp, (off_t)sizeof(buf) * count, SEEK_SET) == (off_t)-1) { ret = errno; break; } left = fread(buf, 1, sizeof(buf), fp); if (ferror(fp)) { ret = errno; break; } if (left == 0) { count--; left = sizeof(buf); } else if (fwrite(buf, (size_t)left, 1, tp) != 1) { ret = errno; break; } fflush(tp); break; } if (fwrite(buf, sizeof(buf), 1, tp) != 1) { ret = errno; break; } count++; } if (ret) goto out3; cp = buf + left - 1; if(*cp != '\n') cp++; for(;;) { while (--cp >= buf) { if (*cp == '\n') { if (--nlines == 0) { if (++cp >= buf + sizeof(buf)) { count++; cp = buf; } break; } } } if (nlines <= 0 || count == 0) break; count--; if (fseeko(tp, (off_t)sizeof(buf) * count, SEEK_SET) == -1) { ret = errno; break; } if (fread(buf, sizeof(buf), 1, tp) != 1) { if (ferror(tp)) { ret = errno; break; } ret = EAGAIN; break; } cp = buf + sizeof(buf); } if (ret || nlines > 0) goto out3; if (fseeko(fp, 0, SEEK_SET) == (off_t)-1) { ret = errno; goto out3; } if (fseeko(tp, (off_t)sizeof(buf) * count + (cp - buf), SEEK_SET) == (off_t)-1) { ret = errno; goto out3; } for(;;) { if ((left = fread(buf, 1, sizeof(buf), tp)) == 0) { if (ferror(fp)) ret = errno; break; } if (fwrite(buf, (size_t)left, 1, fp) != 1) { ret = errno; break; } } fflush(fp); if((off = ftello(fp)) > 0) (void)ftruncate(fileno(fp), off); out3: fclose(tp); out2: unlink(template); out1: fclose(fp); return ret; } /* * read history from a file given */ int read_history(const char *filename) { HistEvent ev; if (h == NULL || e == NULL) rl_initialize(); if (filename == NULL && (filename = _default_history_file()) == NULL) return errno; return history(h, &ev, H_LOAD, filename) == -1 ? (errno ? errno : EINVAL) : 0; } /* * write history to a file given */ int write_history(const char *filename) { HistEvent ev; if (h == NULL || e == NULL) rl_initialize(); if (filename == NULL && (filename = _default_history_file()) == NULL) return errno; return history(h, &ev, H_SAVE, filename) == -1 ? (errno ? errno : EINVAL) : 0; } /* * 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(); if (num < history_base) return NULL; /* save current position */ if (history(h, &ev, H_CURR) != 0) return NULL; curr_num = ev.num; /* * use H_DELDATA to set to nth history (without delete) by passing * (void **)-1 -- as in history_set_pos */ if (history(h, &ev, H_DELDATA, num - history_base, (void **)-1) != 0) goto out; /* get current entry */ if (history(h, &ev, H_CURR) != 0) goto out; if (history(h, &ev, H_NEXT_EVDATA, ev.num, &she.data) != 0) goto out; she.line = ev.str; /* restore pointer to where it was */ (void)history(h, &ev, H_SET, curr_num); return &she; out: /* restore pointer to where it was */ (void)history(h, &ev, H_SET, curr_num); return NULL; } /* * 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; current_history_valid = 1; 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) { HIST_ENTRY *he; HistEvent ev; if (h == NULL || e == NULL) rl_initialize(); if ((he = malloc(sizeof(*he))) == NULL) return NULL; if (history(h, &ev, H_DELDATA, num, &he->data) != 0) { free(he); return NULL; } he->line = ev.str; if (history(h, &ev, H_GETSIZE) == 0) history_length = ev.num; return he; } /* * replace the line and data of the num-th entry */ HIST_ENTRY * replace_history_entry(int num, const char *line, histdata_t data) { HIST_ENTRY *he; 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 the oldest */ if (history(h, &ev, H_LAST) != 0) return NULL; /* error */ if ((he = malloc(sizeof(*he))) == NULL) return NULL; /* look forwards for event matching specified offset */ if (history(h, &ev, H_NEXT_EVDATA, num, &he->data)) goto out; he->line = strdup(ev.str); if (he->line == NULL) goto out; if (history(h, &ev, H_REPLACE, line, data)) goto out; /* restore pointer to where it was */ if (history(h, &ev, H_SET, curr_num)) goto out; return he; out: free(he); return NULL; } /* * clear the history list - delete all entries */ void clear_history(void) { HistEvent ev; (void)history(h, &ev, H_CLEAR); history_length = 0; current_history_valid = 1; } /* * 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; /* start from the oldest */ (void)history(h, &ev, H_LAST); /* position is zero-based */ off = 0; while (ev.num != curr_num && history(h, &ev, H_PREV) == 0) off++; return off; } /* * returns current history event or NULL if there is no such event */ HIST_ENTRY * current_history(void) { return current_history_valid ? _move_history(H_CURR) : NULL; } /* * returns total number of bytes history events' data are using */ int history_total_bytes(void) { HistEvent ev; int curr_num; size_t size; if (history(h, &ev, H_CURR) != 0) return -1; curr_num = ev.num; (void)history(h, &ev, H_FIRST); size = 0; do size += strlen(ev.str) * sizeof(*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 (int)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 0; (void)history(h, &ev, H_CURR); curr_num = ev.num; current_history_valid = 1; /* * use H_DELDATA to set to nth history (without delete) by passing * (void **)-1 */ if (history(h, &ev, H_DELDATA, pos, (void **)-1)) { (void)history(h, &ev, H_SET, curr_num); return 0; } return 1; } /* * returns previous event in history and shifts pointer accordingly * Note that readline and editline define directions in opposite ways. */ HIST_ENTRY * previous_history(void) { if (current_history_valid == 0) { current_history_valid = 1; return _move_history(H_CURR); } return _move_history(H_NEXT); } /* * returns next event in history and shifts pointer accordingly */ HIST_ENTRY * next_history(void) { HIST_ENTRY *he; he = _move_history(H_PREV); if (he == NULL) current_history_valid = 0; return he; } /* * 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; } (void)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) || 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 */ (void)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 the caller's responsibility to free the 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()) != 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, (size_t)len, (size_t)max); } static const char * /*ARGSUSED*/ _rl_completion_append_character_function(const char *dummy __attribute__((__unused__))) { static char buf[2]; buf[0] = rl_completion_append_character; buf[1] = '\0'; return buf; } /* * complete word at current point */ /* ARGSUSED */ int rl_complete(int ignore __attribute__((__unused__)), int invoking_key) { static ct_buffer_t wbreak_conv, sprefix_conv; 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, ct_decode_string(rl_basic_word_break_characters, &wbreak_conv), ct_decode_string(rl_special_prefixes, &sprefix_conv), _rl_completion_append_character_function, (size_t)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, rl_command_func_t *func) { 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; } int rl_insert_text(const char *text) { if (!text || *text == 0) return 0; if (h == NULL || e == NULL) rl_initialize(); if (el_insertstr(e, text) < 0) return 0; return (int)strlen(text); } /*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 ((size_t)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, NULL); 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; if (count == 0 && buf[0] == e->el_tty.t_c[TS_IO][C_EOF]) 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(); } (void)rl_set_prompt(prompt); rl_linefunc = linefunc; el_set(e, EL_UNBUFFERED, 1); } void rl_callback_handler_remove(void) { el_set(e, EL_UNBUFFERED, 0); rl_linefunc = NULL; } void rl_redisplay(void) { char a[2]; a[0] = e->el_tty.t_c[TS_IO][C_REPRINT]; 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(void) { 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, NULL) == -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, wchar_t *wc) { char ch; int n; ssize_t num_read = 0; ch = '\0'; *wc = L'\0'; while (rl_event_hook) { (*rl_event_hook)(); #if defined(FIONREAD) if (ioctl(el->el_infd, FIONREAD, &n) == -1) return -1; if (n) num_read = read(el->el_infd, &ch, 1); else num_read = 0; #elif defined(F_SETFL) && defined(O_NDELAY) if ((n = fcntl(el->el_infd, F_GETFL)) == -1) return -1; if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) == -1) return -1; num_read = read(el->el_infd, &ch, 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, &ch, 1); return -1; #endif if (num_read == -1 && errno == EAGAIN) continue; if (num_read == 0) continue; break; } if (!rl_event_hook) el_set(el, EL_GETCFN, EL_BUILTIN_GETCFN); *wc = (wchar_t)ch; return (int)num_read; } static void _rl_update_pos(void) { const LineInfo *li = el_line(e); rl_point = (int)(li->cursor - li->buffer); rl_end = (int)(li->lastchar - li->buffer); } void rl_get_screen_size(int *rows, int *cols) { if (rows) el_get(e, EL_GETTC, "li", rows); if (cols) el_get(e, EL_GETTC, "co", cols); } void rl_set_screen_size(int rows, int cols) { char buf[64]; (void)snprintf(buf, sizeof(buf), "%d", rows); el_set(e, EL_SETTC, "li", buf, NULL); (void)snprintf(buf, sizeof(buf), "%d", cols); el_set(e, EL_SETTC, "co", buf, NULL); } char ** rl_completion_matches(const char *str, rl_compentry_func_t *fun) { size_t len, max, i, j, min; char **list, *match, *a, *b; len = 1; max = 10; if ((list = reallocarray(NULL, max, sizeof(*list))) == NULL) return NULL; while ((match = (*fun)(str, (int)(len - 1))) != NULL) { list[len++] = match; if (len == max) { char **nl; max += 10; if ((nl = reallocarray(list, max, sizeof(*nl))) == NULL) goto out; list = nl; } } if (len == 1) goto out; list[len] = NULL; if (len == 2) { if ((list[0] = strdup(list[1])) == NULL) goto out; return list; } qsort(&list[1], len - 1, sizeof(*list), (int (*)(const void *, const void *)) strcmp); min = SIZE_MAX; for (i = 1, a = list[i]; i < len - 1; i++, a = b) { b = list[i + 1]; for (j = 0; a[j] && a[j] == b[j]; j++) continue; if (min > j) min = j; } if (min == 0 && *str) { if ((list[0] = strdup(str)) == NULL) goto out; } else { if ((list[0] = malloc(min + 1)) == NULL) goto out; (void)memcpy(list[0], list[1], min); list[0][min] = '\0'; } return list; out: free(list); return NULL; } char * rl_filename_completion_function (const char *text, int state) { return fn_filename_completion_function(text, state); } void rl_forced_update_display(void) { el_set(e, EL_REFRESH); } int _rl_abort_internal(void) { el_beep(e); longjmp(topbuf, 1); /*NOTREACHED*/ } int _rl_qsort_string_compare(char **s1, char **s2) { return strcoll(*s1, *s2); } HISTORY_STATE * history_get_history_state(void) { HISTORY_STATE *hs; if ((hs = malloc(sizeof(HISTORY_STATE))) == NULL) return NULL; hs->length = history_length; return hs; } int /*ARGSUSED*/ rl_kill_text(int from, int to) { return 0; } Keymap rl_make_bare_keymap(void) { return NULL; } Keymap rl_get_keymap(void) { return NULL; } void /*ARGSUSED*/ rl_set_keymap(Keymap k) { } int /*ARGSUSED*/ rl_generic_bind(int type, const char * keyseq, const char * data, Keymap k) { return 0; } int /*ARGSUSED*/ rl_bind_key_in_map(int key, rl_command_func_t *fun, Keymap k) { return 0; } /* unsupported, but needed by python */ void rl_cleanup_after_signal(void) { } int rl_on_new_line(void) { return 0; } int /*ARGSUSED*/ rl_set_keyboard_input_timeout(int u __attribute__((__unused__))) { return 0; }