source: mainline/uspace/app/ash/histedit.c@ 8ccd2ea

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 8ccd2ea was c28a023, checked in by Josef Cejka <malyzelenyhnus@…>, 17 years ago

Initial commit of ash shell.
It cannot be compiled yet.
  • Property mode set to 100644
File size: 10.9 KB
RevLine 
[c28a023]1/* $NetBSD: histedit.c,v 1.24 2000/11/06 04:21:14 mycroft Exp $ */
2
3/*-
4 * Copyright (c) 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
43#else
44__RCSID("$NetBSD: histedit.c,v 1.24 2000/11/06 04:21:14 mycroft Exp $");
45#endif
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <paths.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <unistd.h>
53/*
54 * Editline and history functions (and glue).
55 */
56#include "shell.h"
57#include "parser.h"
58#include "var.h"
59#include "options.h"
60#include "main.h"
61#include "output.h"
62#include "mystring.h"
63#include "error.h"
64#ifndef SMALL
65#include "myhistedit.h"
66#include "eval.h"
67#include "memalloc.h"
68
69#define MAXHISTLOOPS 4 /* max recursions through fc */
70#define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
71
72History *hist; /* history cookie */
73EditLine *el; /* editline cookie */
74int displayhist;
75static FILE *el_in, *el_out;
76
77STATIC const char *fc_replace (const char *, char *, char *);
78
79/*
80 * Set history and editing status. Called whenever the status may
81 * have changed (figures out what to do).
82 */
83void
84histedit()
85{
86
87#define editing (Eflag || Vflag)
88
89 if (iflag) {
90 if (!hist) {
91 /*
92 * turn history on
93 */
94 INTOFF;
95 hist = history_init();
96 INTON;
97
98 if (hist != NULL)
99 sethistsize(histsizeval());
100 else
101 out2str("sh: can't initialize history\n");
102 }
103 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
104 /*
105 * turn editing on
106 */
107 INTOFF;
108 if (el_in == NULL)
109 el_in = fdopen(0, "r");
110 if (el_out == NULL)
111 el_out = fdopen(2, "w");
112 if (el_in == NULL || el_out == NULL)
113 goto bad;
114 el = el_init(arg0, el_in, el_out, el_out);
115 if (el != NULL) {
116 if (hist)
117 el_set(el, EL_HIST, history, hist);
118 el_set(el, EL_PROMPT, getprompt);
119 } else {
120bad:
121 out2str("sh: can't initialize editing\n");
122 }
123 INTON;
124 } else if (!editing && el) {
125 INTOFF;
126 el_end(el);
127 el = NULL;
128 INTON;
129 }
130 if (el) {
131 if (Vflag)
132 el_set(el, EL_EDITOR, "vi");
133 else if (Eflag)
134 el_set(el, EL_EDITOR, "emacs");
135 el_source(el, NULL);
136 }
137 } else {
138 INTOFF;
139 if (el) { /* no editing if not interactive */
140 el_end(el);
141 el = NULL;
142 }
143 if (hist) {
144 history_end(hist);
145 hist = NULL;
146 }
147 INTON;
148 }
149}
150
151
152void
153sethistsize(hs)
154 const char *hs;
155{
156 int histsize;
157 HistEvent he;
158
159 if (hist != NULL) {
160 if (hs == NULL || *hs == '\0' ||
161 (histsize = atoi(hs)) < 0)
162 histsize = 100;
163 history(hist, &he, H_SETSIZE, histsize);
164 }
165}
166
167void
168setterm(term)
169 const char *term;
170{
171 if (el != NULL && term != NULL)
172 if (el_set(el, EL_TERMINAL, term) != 0) {
173 outfmt(out2, "sh: Can't set terminal type %s\n", term);
174 outfmt(out2, "sh: Using dumb terminal settings.\n");
175 }
176}
177
178/*
179 * This command is provided since POSIX decided to standardize
180 * the Korn shell fc command. Oh well...
181 */
182int
183histcmd(argc, argv)
184 int argc;
185 char **argv;
186{
187 int ch;
188 const char *editor = NULL;
189 HistEvent he;
190 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
191 int i, retval;
192 const char *firststr, *laststr;
193 int first, last, direction;
194 char *pat = NULL, *repl; /* ksh "fc old=new" crap */
195 static int active = 0;
196 struct jmploc jmploc;
197 struct jmploc *volatile savehandler;
198 char editfile[MAXPATHLEN + 1];
199 FILE *efp;
200#ifdef __GNUC__
201 /* Avoid longjmp clobbering */
202 (void) &editor;
203 (void) &lflg;
204 (void) &nflg;
205 (void) &rflg;
206 (void) &sflg;
207 (void) &firststr;
208 (void) &laststr;
209 (void) &pat;
210 (void) &repl;
211 (void) &efp;
212 (void) &argc;
213 (void) &argv;
214#endif
215
216 if (hist == NULL)
217 error("history not active");
218
219 if (argc == 1)
220 error("missing history argument");
221
222#ifdef __GLIBC__
223 optind = 1;
224#else
225 optreset = 1; optind = 1; /* initialize getopt */
226#endif
227 while (not_fcnumber(argv[optind]) &&
228 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
229 switch ((char)ch) {
230 case 'e':
231 editor = optarg;
232 break;
233 case 'l':
234 lflg = 1;
235 break;
236 case 'n':
237 nflg = 1;
238 break;
239 case 'r':
240 rflg = 1;
241 break;
242 case 's':
243 sflg = 1;
244 break;
245 case ':':
246 error("option -%c expects argument", optopt);
247 /* NOTREACHED */
248 case '?':
249 default:
250 error("unknown option: -%c", optopt);
251 /* NOTREACHED */
252 }
253 argc -= optind, argv += optind;
254
255 /*
256 * If executing...
257 */
258 if (lflg == 0 || editor || sflg) {
259 lflg = 0; /* ignore */
260 editfile[0] = '\0';
261 /*
262 * Catch interrupts to reset active counter and
263 * cleanup temp files.
264 */
265 if (setjmp(jmploc.loc)) {
266 active = 0;
267 if (*editfile)
268 unlink(editfile);
269 handler = savehandler;
270 longjmp(handler->loc, 1);
271 }
272 savehandler = handler;
273 handler = &jmploc;
274 if (++active > MAXHISTLOOPS) {
275 active = 0;
276 displayhist = 0;
277 error("called recursively too many times");
278 }
279 /*
280 * Set editor.
281 */
282 if (sflg == 0) {
283 if (editor == NULL &&
284 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
285 (editor = bltinlookup("EDITOR", 1)) == NULL)
286 editor = DEFEDITOR;
287 if (editor[0] == '-' && editor[1] == '\0') {
288 sflg = 1; /* no edit */
289 editor = NULL;
290 }
291 }
292 }
293
294 /*
295 * If executing, parse [old=new] now
296 */
297 if (lflg == 0 && argc > 0 &&
298 ((repl = strchr(argv[0], '=')) != NULL)) {
299 pat = argv[0];
300 *repl++ = '\0';
301 argc--, argv++;
302 }
303 /*
304 * determine [first] and [last]
305 */
306 switch (argc) {
307 case 0:
308 firststr = lflg ? "-16" : "-1";
309 laststr = "-1";
310 break;
311 case 1:
312 firststr = argv[0];
313 laststr = lflg ? "-1" : argv[0];
314 break;
315 case 2:
316 firststr = argv[0];
317 laststr = argv[1];
318 break;
319 default:
320 error("too many args");
321 /* NOTREACHED */
322 }
323 /*
324 * Turn into event numbers.
325 */
326 first = str_to_event(firststr, 0);
327 last = str_to_event(laststr, 1);
328
329 if (rflg) {
330 i = last;
331 last = first;
332 first = i;
333 }
334 /*
335 * XXX - this should not depend on the event numbers
336 * always increasing. Add sequence numbers or offset
337 * to the history element in next (diskbased) release.
338 */
339 direction = first < last ? H_PREV : H_NEXT;
340
341 /*
342 * If editing, grab a temp file.
343 */
344 if (editor) {
345 int fd;
346 INTOFF; /* easier */
347 sprintf(editfile, "%s_shXXXXXX", _PATH_TMP);
348 if ((fd = mkstemp(editfile)) < 0)
349 error("can't create temporary file %s", editfile);
350 if ((efp = fdopen(fd, "w")) == NULL) {
351 close(fd);
352 error("can't allocate stdio buffer for temp");
353 }
354 }
355
356 /*
357 * Loop through selected history events. If listing or executing,
358 * do it now. Otherwise, put into temp file and call the editor
359 * after.
360 *
361 * The history interface needs rethinking, as the following
362 * convolutions will demonstrate.
363 */
364 history(hist, &he, H_FIRST);
365 retval = history(hist, &he, H_NEXT_EVENT, first);
366 for (;retval != -1; retval = history(hist, &he, direction)) {
367 if (lflg) {
368 if (!nflg)
369 out1fmt("%5d ", he.num);
370 out1str(he.str);
371 } else {
372 const char *s = pat ?
373 fc_replace(he.str, pat, repl) : he.str;
374 char *sp;
375
376 if (sflg) {
377 if (displayhist) {
378 out2str(s);
379 }
380
381 evalstring(strcpy(stalloc(strlen(s) + 1), s), 0);
382 free(sp);
383 if (displayhist && hist) {
384 /*
385 * XXX what about recursive and
386 * relative histnums.
387 */
388 history(hist, &he, H_ENTER, s);
389 }
390 } else
391 fputs(s, efp);
392 }
393 /*
394 * At end? (if we were to lose last, we'd sure be
395 * messed up).
396 */
397 if (he.num == last)
398 break;
399 }
400 if (editor) {
401 char *editcmd;
402
403 fclose(efp);
404 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
405 sprintf(editcmd, "%s %s", editor, editfile);
406 evalstring(editcmd, 0); /* XXX - should use no JC command */
407 INTON;
408 readcmdfile(editfile); /* XXX - should read back - quick tst */
409 unlink(editfile);
410 }
411
412 if (lflg == 0 && active > 0)
413 --active;
414 if (displayhist)
415 displayhist = 0;
416 return 0;
417}
418
419STATIC const char *
420fc_replace(s, p, r)
421 const char *s;
422 char *p, *r;
423{
424 char *dest;
425 int plen = strlen(p);
426
427 STARTSTACKSTR(dest);
428 while (*s) {
429 if (*s == *p && strncmp(s, p, plen) == 0) {
430 while (*r)
431 STPUTC(*r++, dest);
432 s += plen;
433 *p = '\0'; /* so no more matches */
434 } else
435 STPUTC(*s++, dest);
436 }
437 STACKSTRNUL(dest);
438 dest = grabstackstr(dest);
439
440 return (dest);
441}
442
443int
444not_fcnumber(s)
445 char *s;
446{
447 if (s == NULL)
448 return 0;
449 if (*s == '-')
450 s++;
451 return (!is_number(s));
452}
453
454int
455str_to_event(str, last)
456 const char *str;
457 int last;
458{
459 HistEvent he;
460 const char *s = str;
461 int relative = 0;
462 int i, retval;
463
464 retval = history(hist, &he, H_FIRST);
465 switch (*s) {
466 case '-':
467 relative = 1;
468 /*FALLTHROUGH*/
469 case '+':
470 s++;
471 }
472 if (is_number(s)) {
473 i = atoi(s);
474 if (relative) {
475 while (retval != -1 && i--) {
476 retval = history(hist, &he, H_NEXT);
477 }
478 if (retval == -1)
479 retval = history(hist, &he, H_LAST);
480 } else {
481 retval = history(hist, &he, H_NEXT_EVENT, i);
482 if (retval == -1) {
483 /*
484 * the notion of first and last is
485 * backwards to that of the history package
486 */
487 retval = history(hist, &he,
488 last ? H_FIRST : H_LAST);
489 }
490 }
491 if (retval == -1)
492 error("history number %s not found (internal error)",
493 str);
494 } else {
495 /*
496 * pattern
497 */
498 retval = history(hist, &he, H_PREV_STR, str);
499 if (retval == -1)
500 error("history pattern not found: %s", str);
501 }
502 return (he.num);
503}
504#else
505int
506histcmd(argc, argv)
507 int argc;
508 char **argv;
509{
510 error("not compiled with history support");
511 /* NOTREACHED */
512}
513#endif
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