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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
48 * Editline and history functions (and glue).
58 #include "myhistedit.h"
64 #define MAXHISTLOOPS 4 /* max recursions through fc */
65 #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
67 History *hist; /* history cookie */
68 EditLine *el; /* editline cookie */
70 static FILE *el_in, *el_out, *el_err;
72 static char *fc_replace(const char *, char *, char *);
73 static int not_fcnumber(const char *);
74 static int str_to_event(const char *, int);
77 * Set history and editing status. Called whenever the status may
78 * have changed (figures out what to do).
84 #define editing (Eflag || Vflag)
92 hist = history_init();
96 sethistsize(histsizeval());
98 out2fmt_flush("sh: can't initialize history\n");
100 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
108 el_in = fdopen(0, "r");
110 el_err = fdopen(1, "w");
112 el_out = fdopen(2, "w");
113 if (el_in == NULL || el_err == NULL || el_out == NULL)
115 term = lookupvar("TERM");
117 setenv("TERM", term, 1);
120 el = el_init(arg0, el_in, el_out, el_err);
123 el_set(el, EL_HIST, history, hist);
124 el_set(el, EL_PROMPT, getprompt);
125 el_set(el, EL_ADDFN, "sh-complete",
126 "Filename completion",
130 out2fmt_flush("sh: can't initialize editing\n");
133 } else if (!editing && el) {
141 el_set(el, EL_EDITOR, "vi");
143 el_set(el, EL_EDITOR, "emacs");
144 el_set(el, EL_BIND, "^R", "em-inc-search-prev", NULL);
146 el_set(el, EL_BIND, "^I", "sh-complete", NULL);
151 if (el) { /* no editing if not interactive */
165 sethistsize(const char *hs)
171 if (hs == NULL || !is_number(hs))
175 history(hist, &he, H_SETSIZE, histsize);
176 history(hist, &he, H_SETUNIQUE, 1);
181 setterm(const char *term)
183 if (rootshell && el != NULL && term != NULL)
184 el_set(el, EL_TERMINAL, term);
188 histcmd(int argc, char **argv __unused)
191 const char *editor = NULL;
193 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
195 const char *firststr, *laststr;
196 int first, last, direction;
197 char *pat = NULL, *repl = NULL;
198 static int active = 0;
199 struct jmploc jmploc;
200 struct jmploc *savehandler;
201 char editfilestr[PATH_MAX];
202 char *volatile editfile;
207 error("history not active");
210 error("missing history argument");
212 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
231 savehandler = handler;
235 if (lflg == 0 || editor || sflg) {
236 lflg = 0; /* ignore */
239 * Catch interrupts to reset active counter and
240 * cleanup temp files.
242 if (setjmp(jmploc.loc)) {
246 handler = savehandler;
247 longjmp(handler->loc, 1);
250 if (++active > MAXHISTLOOPS) {
253 error("called recursively too many times");
259 if (editor == NULL &&
260 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
261 (editor = bltinlookup("EDITOR", 1)) == NULL)
263 if (editor[0] == '-' && editor[1] == '\0') {
264 sflg = 1; /* no edit */
271 * If executing, parse [old=new] now
273 if (lflg == 0 && *argptr != NULL &&
274 ((repl = strchr(*argptr, '=')) != NULL)) {
280 * determine [first] and [last]
282 if (*argptr == NULL) {
283 firststr = lflg ? "-16" : "-1";
285 } else if (argptr[1] == NULL) {
286 firststr = argptr[0];
287 laststr = lflg ? "-1" : argptr[0];
288 } else if (argptr[2] == NULL) {
289 firststr = argptr[0];
292 error("too many arguments");
294 * Turn into event numbers.
296 first = str_to_event(firststr, 0);
297 last = str_to_event(laststr, 1);
305 * XXX - this should not depend on the event numbers
306 * always increasing. Add sequence numbers or offset
307 * to the history element in next (diskbased) release.
309 direction = first < last ? H_PREV : H_NEXT;
312 * If editing, grab a temp file.
317 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
318 if ((fd = mkstemp(editfilestr)) < 0)
319 error("can't create temporary file %s", editfile);
320 editfile = editfilestr;
321 if ((efp = fdopen(fd, "w")) == NULL) {
323 error("Out of space");
328 * Loop through selected history events. If listing or executing,
329 * do it now. Otherwise, put into temp file and call the editor
332 * The history interface needs rethinking, as the following
333 * convolutions will demonstrate.
335 history(hist, &he, H_FIRST);
336 retval = history(hist, &he, H_NEXT_EVENT, first);
337 for (;retval != -1; retval = history(hist, &he, direction)) {
340 out1fmt("%5d ", he.num);
343 const char *s = pat ?
344 fc_replace(he.str, pat, repl) : he.str;
352 if (displayhist && hist) {
354 * XXX what about recursive and
358 history(hist, &he, H_ENTER, s);
360 * XXX H_ENTER moves the internal
361 * cursor, set it back to the current
365 H_NEXT_EVENT, oldhistnum);
371 * At end? (if we were to lose last, we'd sure be
382 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
383 sprintf(editcmd, "%s %s", editor, editfile);
384 evalstring(editcmd, 0); /* XXX - should use no JC command */
385 readcmdfile(editfile); /* XXX - should read back - quick tst */
389 if (lflg == 0 && active > 0)
393 handler = savehandler;
398 fc_replace(const char *s, char *p, char *r)
401 int plen = strlen(p);
405 if (*s == *p && strncmp(s, p, plen) == 0) {
408 *p = '\0'; /* so no more matches */
413 dest = grabstackstr(dest);
419 not_fcnumber(const char *s)
425 return (!is_number(s));
429 str_to_event(const char *str, int last)
436 retval = history(hist, &he, H_FIRST);
447 while (retval != -1 && i--) {
448 retval = history(hist, &he, H_NEXT);
451 retval = history(hist, &he, H_LAST);
453 retval = history(hist, &he, H_NEXT_EVENT, i);
456 * the notion of first and last is
457 * backwards to that of the history package
459 retval = history(hist, &he, last ? H_FIRST : H_LAST);
463 error("history number %s not found (internal error)",
469 retval = history(hist, &he, H_PREV_STR, str);
471 error("history pattern not found: %s", str);
477 bindcmd(int argc, char **argv)
484 error("line editing is disabled");
490 error("Out of space");
492 el_get(el, EL_GETFP, 1, &old);
493 el_set(el, EL_SETFP, 1, out);
495 ret = el_parse(el, argc, __DECONST(const char **, argv));
497 el_set(el, EL_SETFP, 1, old);
510 histcmd(int argc, char **argv)
513 error("not compiled with history support");
519 bindcmd(int argc, char **argv)
522 error("not compiled with line editing support");