3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)histedit.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/histedit.c,v 1.44 2012/01/01 22:17:12 jilles Exp $
40 #include <sys/param.h>
47 * Editline and history functions (and glue).
56 #include "myhistedit.h"
63 #define MAXHISTLOOPS 4 /* max recursions through fc */
64 #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
66 History *hist; /* history cookie */
67 EditLine *el; /* editline cookie */
69 static FILE *el_in, *el_out, *el_err;
71 static char *fc_replace(const char *, char *, char *);
72 static int not_fcnumber(const char *);
73 static int str_to_event(const char *, int);
76 * Set history and editing status. Called whenever the status may
77 * have changed (figures out what to do).
83 #define editing (Eflag || Vflag)
91 hist = history_init();
95 sethistsize(histsizeval());
97 out2fmt_flush("sh: can't initialize history\n");
99 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
107 el_in = fdopen(0, "r");
109 el_err = fdopen(1, "w");
111 el_out = fdopen(2, "w");
112 if (el_in == NULL || el_err == NULL || el_out == NULL)
114 term = lookupvar("TERM");
116 if (setenv("TERM", term, 1) == -1)
117 error("setenv: cannot set TERM=1");
121 el = el_init(arg0, el_in, el_out, el_err);
124 el_set(el, EL_HIST, history, hist);
125 el_set(el, EL_PROMPT, getprompt);
126 el_set(el, EL_ADDFN, "rl-complete",
127 "ReadLine compatible completion function",
131 out2fmt_flush("sh: can't initialize editing\n");
134 } else if (!editing && el) {
142 el_set(el, EL_EDITOR, "vi");
144 el_set(el, EL_EDITOR, "emacs");
145 el_set(el, EL_BIND, "^I",
146 tabcomplete ? "rl-complete" : "ed-insert", NULL);
151 if (el) { /* no editing if not interactive */
165 sethistsize(const char *hs)
171 if (hs == NULL || *hs == '\0' ||
172 (histsize = atoi(hs)) < 0)
174 history(hist, &he, H_SETSIZE, histsize);
175 history(hist, &he, H_SETUNIQUE, 1);
180 setterm(const char *term)
182 if (rootshell && el != NULL && term != NULL)
183 el_set(el, EL_TERMINAL, term);
187 histcmd(int argc, char **argv)
190 const char *volatile editor = NULL;
192 volatile int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
194 const char *firststr = NULL, *laststr = NULL;
195 int first, last, direction;
196 char *pat = NULL, *repl = NULL;
197 static int active = 0;
198 struct jmploc jmploc;
199 struct jmploc *savehandler;
200 char editfilestr[PATH_MAX];
201 char *volatile editfile;
206 error("history not active");
209 error("missing history argument");
211 optreset = 1; optind = 1; /* initialize getopt */
213 while (not_fcnumber(argv[optind]) &&
214 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
232 error("option -%c expects argument", optopt);
235 error("unknown option: -%c", optopt);
237 argc -= optind, argv += optind;
239 savehandler = handler;
243 if (lflg == 0 || editor || sflg) {
244 lflg = 0; /* ignore */
247 * Catch interrupts to reset active counter and
248 * cleanup temp files.
250 if (setjmp(jmploc.loc)) {
254 handler = savehandler;
255 longjmp(handler->loc, 1);
258 if (++active > MAXHISTLOOPS) {
261 error("called recursively too many times");
267 if (editor == NULL &&
268 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
269 (editor = bltinlookup("EDITOR", 1)) == NULL)
271 if (editor[0] == '-' && editor[1] == '\0') {
272 sflg = 1; /* no edit */
279 * If executing, parse [old=new] now
281 if (lflg == 0 && argc > 0 &&
282 ((repl = strchr(argv[0], '=')) != NULL)) {
288 * determine [first] and [last]
292 firststr = lflg ? "-16" : "-1";
297 laststr = lflg ? "-1" : argv[0];
304 error("too many arguments");
307 * Turn into event numbers.
309 first = str_to_event(firststr, 0);
310 last = str_to_event(laststr, 1);
318 * XXX - this should not depend on the event numbers
319 * always increasing. Add sequence numbers or offset
320 * to the history element in next (diskbased) release.
322 direction = first < last ? H_PREV : H_NEXT;
325 * If editing, grab a temp file.
330 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
331 if ((fd = mkstemp(editfilestr)) < 0)
332 error("can't create temporary file %s", editfile);
333 editfile = editfilestr;
334 if ((efp = fdopen(fd, "w")) == NULL) {
336 error("Out of space");
341 * Loop through selected history events. If listing or executing,
342 * do it now. Otherwise, put into temp file and call the editor
345 * The history interface needs rethinking, as the following
346 * convolutions will demonstrate.
348 history(hist, &he, H_FIRST);
349 retval = history(hist, &he, H_NEXT_EVENT, first);
350 for (;retval != -1; retval = history(hist, &he, direction)) {
353 out1fmt("%5d ", he.num);
357 fc_replace(he.str, pat, repl) :
358 __DECONST(char *, he.str);
366 if (displayhist && hist) {
368 * XXX what about recursive and
372 history(hist, &he, H_ENTER, s);
374 * XXX H_ENTER moves the internal
375 * cursor, set it back to the current
378 retval = history(hist, &he,
379 H_NEXT_EVENT, oldhistnum);
385 * At end? (if we were to lose last, we'd sure be
395 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
396 sprintf(editcmd, "%s %s", editor, editfile);
397 evalstring(editcmd, 0); /* XXX - should use no JC command */
399 readcmdfile(editfile); /* XXX - should read back - quick tst */
403 if (lflg == 0 && active > 0)
407 handler = savehandler;
412 fc_replace(const char *s, char *p, char *r)
415 int plen = strlen(p);
419 if (*s == *p && strncmp(s, p, plen) == 0) {
422 *p = '\0'; /* so no more matches */
427 dest = grabstackstr(dest);
433 not_fcnumber(const char *s)
439 return (!is_number(s));
443 str_to_event(const char *str, int last)
450 retval = history(hist, &he, H_FIRST);
461 while (retval != -1 && i--) {
462 retval = history(hist, &he, H_NEXT);
465 retval = history(hist, &he, H_LAST);
467 retval = history(hist, &he, H_NEXT_EVENT, i);
470 * the notion of first and last is
471 * backwards to that of the history package
473 retval = history(hist, &he, last ? H_FIRST : H_LAST);
477 error("history number %s not found (internal error)",
483 retval = history(hist, &he, H_PREV_STR, str);
485 error("history pattern not found: %s", str);
491 bindcmd(int argc, char **argv)
495 error("line editing is disabled");
496 return (el_parse(el, argc, (const char **)argv));
503 histcmd(int argc __unused, char **argv __unused)
506 error("not compiled with history support");
512 bindcmd(int argc __unused, char **argv __unused)
515 error("not compiled with line editing support");