Merge from vendor branch LUKEMFTP:
[dragonfly.git] / bin / sh / histedit.c
CommitLineData
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1/*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
23 *
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
34 * SUCH DAMAGE.
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35 *
36 * @(#)histedit.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/histedit.c,v 1.13.2.4 2002/08/27 01:36:28 tjr Exp $
1f0f7b35 38 * $DragonFly: src/bin/sh/histedit.c,v 1.5 2005/11/06 11:44:02 swildner Exp $
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39 */
40
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41#include <sys/param.h>
42#include <limits.h>
43#include <paths.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <unistd.h>
47/*
48 * Editline and history functions (and glue).
49 */
50#include "shell.h"
51#include "parser.h"
52#include "var.h"
53#include "options.h"
54#include "main.h"
55#include "output.h"
56#include "mystring.h"
57#ifndef NO_HISTORY
58#include "myhistedit.h"
59#include "error.h"
60#include "eval.h"
61#include "memalloc.h"
62
63#define MAXHISTLOOPS 4 /* max recursions through fc */
64#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
65
66History *hist; /* history cookie */
67EditLine *el; /* editline cookie */
68int displayhist;
69static FILE *el_in, *el_out;
70
71STATIC char *fc_replace(const char *, char *, char *);
72
73/*
74 * Set history and editing status. Called whenever the status may
75 * have changed (figures out what to do).
76 */
77void
78histedit(void)
79{
80
81#define editing (Eflag || Vflag)
82
83 if (iflag) {
84 if (!hist) {
85 /*
86 * turn history on
87 */
88 INTOFF;
89 hist = history_init();
90 INTON;
91
92 if (hist != NULL)
93 sethistsize(histsizeval());
94 else
95 out2str("sh: can't initialize history\n");
96 }
97 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
98 /*
99 * turn editing on
100 */
101 INTOFF;
102 if (el_in == NULL)
103 el_in = fdopen(0, "r");
104 if (el_out == NULL)
105 el_out = fdopen(2, "w");
106 if (el_in == NULL || el_out == NULL)
107 goto bad;
108 el = el_init(arg0, el_in, el_out);
109 if (el != NULL) {
110 if (hist)
111 el_set(el, EL_HIST, history, hist);
112 el_set(el, EL_PROMPT, getprompt);
113 } else {
114bad:
115 out2str("sh: can't initialize editing\n");
116 }
117 INTON;
118 } else if (!editing && el) {
119 INTOFF;
120 el_end(el);
121 el = NULL;
122 INTON;
123 }
124 if (el) {
125 if (Vflag)
126 el_set(el, EL_EDITOR, "vi");
127 else if (Eflag)
128 el_set(el, EL_EDITOR, "emacs");
129 el_source(el, NULL);
130 }
131 } else {
132 INTOFF;
133 if (el) { /* no editing if not interactive */
134 el_end(el);
135 el = NULL;
136 }
137 if (hist) {
138 history_end(hist);
139 hist = NULL;
140 }
141 INTON;
142 }
143}
144
145
146void
1f0f7b35 147sethistsize(const char *hs)
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148{
149 int histsize;
150
151 if (hist != NULL) {
152 if (hs == NULL || *hs == '\0' ||
153 (histsize = atoi(hs)) < 0)
154 histsize = 100;
155 history(hist, H_EVENT, histsize);
156 }
157}
158
159/*
160 * This command is provided since POSIX decided to standardize
161 * the Korn shell fc command. Oh well...
162 */
163int
164histcmd(int argc, char **argv)
165{
166 int ch;
492efe05 167 const char *editor = NULL;
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168 const HistEvent *he;
169 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
170 int i;
492efe05 171 const char *firststr, *laststr;
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172 int first, last, direction;
173 char *pat = NULL, *repl; /* ksh "fc old=new" crap */
174 static int active = 0;
175 struct jmploc jmploc;
176 struct jmploc *volatile savehandler;
177 char editfile[PATH_MAX];
178 FILE *efp;
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179#ifdef __GNUC__
180 /* Avoid longjmp clobbering */
181 (void) &editor;
182 (void) &lflg;
183 (void) &nflg;
184 (void) &rflg;
185 (void) &sflg;
186 (void) &firststr;
187 (void) &laststr;
188 (void) &pat;
189 (void) &repl;
190 (void) &efp;
191 (void) &argc;
192 (void) &argv;
193#endif
194
195 if (hist == NULL)
196 error("history not active");
197
198 if (argc == 1)
199 error("missing history argument");
200
201 optreset = 1; optind = 1; /* initialize getopt */
202 opterr = 0;
203 while (not_fcnumber(argv[optind]) &&
204 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
205 switch ((char)ch) {
206 case 'e':
207 editor = optarg;
208 break;
209 case 'l':
210 lflg = 1;
211 break;
212 case 'n':
213 nflg = 1;
214 break;
215 case 'r':
216 rflg = 1;
217 break;
218 case 's':
219 sflg = 1;
220 break;
221 case ':':
222 error("option -%c expects argument", optopt);
223 case '?':
224 default:
225 error("unknown option: -%c", optopt);
226 }
227 argc -= optind, argv += optind;
228
229 /*
230 * If executing...
231 */
232 if (lflg == 0 || editor || sflg) {
233 lflg = 0; /* ignore */
234 editfile[0] = '\0';
235 /*
236 * Catch interrupts to reset active counter and
237 * cleanup temp files.
238 */
239 if (setjmp(jmploc.loc)) {
240 active = 0;
241 if (*editfile)
242 unlink(editfile);
243 handler = savehandler;
244 longjmp(handler->loc, 1);
245 }
246 savehandler = handler;
247 handler = &jmploc;
248 if (++active > MAXHISTLOOPS) {
249 active = 0;
250 displayhist = 0;
251 error("called recursively too many times");
252 }
253 /*
254 * Set editor.
255 */
256 if (sflg == 0) {
257 if (editor == NULL &&
258 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
259 (editor = bltinlookup("EDITOR", 1)) == NULL)
260 editor = DEFEDITOR;
261 if (editor[0] == '-' && editor[1] == '\0') {
262 sflg = 1; /* no edit */
263 editor = NULL;
264 }
265 }
266 }
267
268 /*
269 * If executing, parse [old=new] now
270 */
271 if (lflg == 0 && argc > 0 &&
272 ((repl = strchr(argv[0], '=')) != NULL)) {
273 pat = argv[0];
274 *repl++ = '\0';
275 argc--, argv++;
276 }
277 /*
278 * determine [first] and [last]
279 */
280 switch (argc) {
281 case 0:
282 firststr = lflg ? "-16" : "-1";
283 laststr = "-1";
284 break;
285 case 1:
286 firststr = argv[0];
287 laststr = lflg ? "-1" : argv[0];
288 break;
289 case 2:
290 firststr = argv[0];
291 laststr = argv[1];
292 break;
293 default:
294 error("too many args");
295 }
296 /*
297 * Turn into event numbers.
298 */
299 first = str_to_event(firststr, 0);
300 last = str_to_event(laststr, 1);
301
302 if (rflg) {
303 i = last;
304 last = first;
305 first = i;
306 }
307 /*
308 * XXX - this should not depend on the event numbers
309 * always increasing. Add sequence numbers or offset
310 * to the history element in next (diskbased) release.
311 */
312 direction = first < last ? H_PREV : H_NEXT;
313
314 /*
315 * If editing, grab a temp file.
316 */
317 if (editor) {
318 int fd;
319 INTOFF; /* easier */
320 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
321 if ((fd = mkstemp(editfile)) < 0)
322 error("can't create temporary file %s", editfile);
323 if ((efp = fdopen(fd, "w")) == NULL) {
324 close(fd);
325 error("can't allocate stdio buffer for temp");
326 }
327 }
328
329 /*
330 * Loop through selected history events. If listing or executing,
331 * do it now. Otherwise, put into temp file and call the editor
332 * after.
333 *
334 * The history interface needs rethinking, as the following
335 * convolutions will demonstrate.
336 */
337 history(hist, H_FIRST);
338 he = history(hist, H_NEXT_EVENT, first);
339 for (;he != NULL; he = history(hist, direction)) {
340 if (lflg) {
341 if (!nflg)
342 out1fmt("%5d ", he->num);
343 out1str(he->str);
344 } else {
345 char *s = pat ?
346 fc_replace(he->str, pat, repl) : (char *)he->str;
347
348 if (sflg) {
349 if (displayhist) {
350 out2str(s);
351 }
352 evalstring(s);
353 if (displayhist && hist) {
354 /*
355 * XXX what about recursive and
356 * relative histnums.
357 */
358 history(hist, H_ENTER, s);
359 }
360 } else
361 fputs(s, efp);
362 }
363 /*
364 * At end? (if we were to loose last, we'd sure be
365 * messed up).
366 */
367 if (he->num == last)
368 break;
369 }
370 if (editor) {
371 char *editcmd;
372
373 fclose(efp);
374 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
375 sprintf(editcmd, "%s %s", editor, editfile);
376 evalstring(editcmd); /* XXX - should use no JC command */
377 INTON;
378 readcmdfile(editfile); /* XXX - should read back - quick tst */
379 unlink(editfile);
380 }
381
382 if (lflg == 0 && active > 0)
383 --active;
384 if (displayhist)
385 displayhist = 0;
386 return 0;
387}
388
389STATIC char *
390fc_replace(const char *s, char *p, char *r)
391{
392 char *dest;
393 int plen = strlen(p);
394
395 STARTSTACKSTR(dest);
396 while (*s) {
397 if (*s == *p && strncmp(s, p, plen) == 0) {
398 while (*r)
399 STPUTC(*r++, dest);
400 s += plen;
401 *p = '\0'; /* so no more matches */
402 } else
403 STPUTC(*s++, dest);
404 }
405 STACKSTRNUL(dest);
406 dest = grabstackstr(dest);
407
408 return (dest);
409}
410
411int
412not_fcnumber(char *s)
413{
414 if (s == NULL)
415 return (0);
416 if (*s == '-')
417 s++;
418 return (!is_number(s));
419}
420
421int
492efe05 422str_to_event(const char *str, int last)
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423{
424 const HistEvent *he;
492efe05 425 const char *s = str;
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426 int relative = 0;
427 int i;
428
429 he = history(hist, H_FIRST);
430 switch (*s) {
431 case '-':
432 relative = 1;
433 /*FALLTHROUGH*/
434 case '+':
435 s++;
436 }
437 if (is_number(s)) {
438 i = atoi(s);
439 if (relative) {
440 while (he != NULL && i--) {
441 he = history(hist, H_NEXT);
442 }
443 if (he == NULL)
444 he = history(hist, H_LAST);
445 } else {
446 he = history(hist, H_NEXT_EVENT, i);
447 if (he == NULL) {
448 /*
449 * the notion of first and last is
450 * backwards to that of the history package
451 */
452 he = history(hist, last ? H_FIRST : H_LAST);
453 }
454 }
455 if (he == NULL)
456 error("history number %s not found (internal error)",
457 str);
458 } else {
459 /*
460 * pattern
461 */
462 he = history(hist, H_PREV_STR, str);
463 if (he == NULL)
464 error("history pattern not found: %s", str);
465 }
466 return (he->num);
467}
468
469int
470bindcmd(int argc, char **argv)
471{
472
473 if (el == NULL)
474 error("line editing is disabled");
475 return (el_parse(el, argc, argv));
476}
477
478#else
479#include "error.h"
480
481int
482histcmd(int argc, char **argv)
483{
484
485 error("not compiled with history support");
486 /*NOTREACHED*/
487 return (0);
488}
489
490int
491bindcmd(int argc, char **argv)
492{
493
494 error("not compiled with line editing support");
495 return (0);
496}
497#endif