Commit | Line | Data |
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3b2a15e8 | 1 | /*- |
69edccc9 KB |
2 | * Copyright (c) 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
3b2a15e8 KB |
4 | * |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Kenneth Almquist. | |
7 | * | |
8 | * %sccs.include.redist.c% | |
9 | */ | |
10 | ||
11 | #ifndef lint | |
13b3e634 | 12 | static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) %G%"; |
3b2a15e8 KB |
13 | #endif /* not lint */ |
14 | ||
f7280c66 MT |
15 | #include <sys/param.h> |
16 | #include <paths.h> | |
dc06984c | 17 | #include <stdio.h> |
13b3e634 CZ |
18 | #include <stdlib.h> |
19 | #include <unistd.h> | |
20 | /* | |
21 | * Editline and history functions (and glue). | |
22 | */ | |
f7280c66 | 23 | #include "shell.h" |
dc06984c | 24 | #include "parser.h" |
f7280c66 | 25 | #include "var.h" |
dc06984c | 26 | #include "options.h" |
13b3e634 CZ |
27 | #include "main.h" |
28 | #include "output.h" | |
f7280c66 | 29 | #include "mystring.h" |
13b3e634 CZ |
30 | #ifndef NO_HISTORY |
31 | #include "myhistedit.h" | |
32 | #endif | |
dc06984c | 33 | #include "error.h" |
13b3e634 | 34 | #include "eval.h" |
f7280c66 MT |
35 | #include "memalloc.h" |
36 | ||
37 | #define MAXHISTLOOPS 4 /* max recursions through fc */ | |
38 | #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */ | |
dc06984c MT |
39 | |
40 | History *hist; /* history cookie */ | |
41 | EditLine *el; /* editline cookie */ | |
f7280c66 | 42 | int displayhist; |
dc06984c MT |
43 | static FILE *el_in, *el_out; |
44 | ||
f7280c66 | 45 | STATIC char *fc_replace __P((const char *, char *, char *)); |
dc06984c MT |
46 | |
47 | /* | |
48 | * Set history and editing status. Called whenever the status may | |
49 | * have changed (figures out what to do). | |
50 | */ | |
13b3e634 CZ |
51 | void |
52 | histedit() | |
53 | { | |
dc06984c | 54 | |
f7280c66 MT |
55 | #define editing (Eflag || Vflag) |
56 | ||
57 | if (iflag) { | |
dc06984c MT |
58 | if (!hist) { |
59 | /* | |
60 | * turn history on | |
61 | */ | |
62 | INTOFF; | |
63 | hist = history_init(); | |
64 | INTON; | |
65 | ||
66 | if (hist != NULL) | |
67 | sethistsize(); | |
68 | else | |
69 | out2str("sh: can't initialize history\n"); | |
70 | } | |
f7280c66 | 71 | if (editing && !el && isatty(0)) { /* && isatty(2) ??? */ |
dc06984c MT |
72 | /* |
73 | * turn editing on | |
74 | */ | |
75 | INTOFF; | |
76 | if (el_in == NULL) | |
77 | el_in = fdopen(0, "r"); | |
78 | if (el_out == NULL) | |
79 | el_out = fdopen(2, "w"); | |
80 | if (el_in == NULL || el_out == NULL) | |
81 | goto bad; | |
82 | el = el_init(arg0, el_in, el_out); | |
83 | if (el != NULL) { | |
84 | if (hist) | |
f7280c66 | 85 | el_set(el, EL_HIST, history, hist); |
dc06984c MT |
86 | el_set(el, EL_PROMPT, getprompt); |
87 | } else { | |
88 | bad: | |
89 | out2str("sh: can't initialize editing\n"); | |
90 | } | |
91 | INTON; | |
f7280c66 | 92 | } else if (!editing && el) { |
dc06984c MT |
93 | INTOFF; |
94 | el_end(el); | |
95 | el = NULL; | |
96 | INTON; | |
97 | } | |
f7280c66 MT |
98 | if (el) { |
99 | if (Vflag) | |
100 | el_set(el, EL_EDITOR, "vi"); | |
101 | else if (Eflag) | |
102 | el_set(el, EL_EDITOR, "emacs"); | |
103 | } | |
dc06984c MT |
104 | } else { |
105 | INTOFF; | |
106 | if (el) { /* no editing if not interactive */ | |
107 | el_end(el); | |
108 | el = NULL; | |
109 | } | |
110 | if (hist) { | |
111 | history_end(hist); | |
112 | hist = NULL; | |
113 | } | |
114 | INTON; | |
115 | } | |
116 | } | |
117 | ||
13b3e634 CZ |
118 | |
119 | void | |
120 | sethistsize() | |
121 | { | |
dc06984c MT |
122 | char *cp; |
123 | int histsize; | |
124 | ||
125 | if (hist != NULL) { | |
126 | cp = lookupvar("HISTSIZE"); | |
127 | if (cp == NULL || *cp == '\0' || | |
128 | (histsize = atoi(cp)) < 0) | |
129 | histsize = 100; | |
f7280c66 MT |
130 | history(hist, H_EVENT, histsize); |
131 | } | |
132 | } | |
133 | ||
134 | /* | |
135 | * This command is provided since POSIX decided to standardize | |
136 | * the Korn shell fc command. Oh well... | |
137 | */ | |
13b3e634 | 138 | int |
f7280c66 | 139 | histcmd(argc, argv) |
13b3e634 CZ |
140 | int argc; |
141 | char **argv; | |
f7280c66 MT |
142 | { |
143 | extern char *optarg; | |
144 | extern int optind, optopt, optreset; | |
145 | int ch; | |
146 | char *editor = NULL; | |
147 | const HistEvent *he; | |
148 | int lflg = 0, nflg = 0, rflg = 0, sflg = 0; | |
149 | int i; | |
150 | char *firststr, *laststr; | |
151 | int first, last, direction; | |
152 | char *pat = NULL, *repl; /* ksh "fc old=new" crap */ | |
153 | static int active = 0; | |
154 | struct jmploc jmploc; | |
155 | struct jmploc *volatile savehandler; | |
156 | char editfile[MAXPATHLEN + 1]; | |
157 | FILE *efp; | |
13b3e634 CZ |
158 | #ifdef __GNUC__ |
159 | /* Avoid longjmp clobbering */ | |
160 | (void) &editor; | |
161 | (void) &lflg; | |
162 | (void) &nflg; | |
163 | (void) &rflg; | |
164 | (void) &sflg; | |
165 | (void) &firststr; | |
166 | (void) &laststr; | |
167 | (void) &pat; | |
168 | (void) &repl; | |
169 | (void) &efp; | |
170 | (void) &argc; | |
171 | (void) &argv; | |
172 | #endif | |
f7280c66 MT |
173 | |
174 | if (hist == NULL) | |
175 | error("history not active"); | |
c77caef5 KB |
176 | |
177 | if (argc == 1) | |
178 | error("missing history argument"); | |
f7280c66 MT |
179 | |
180 | optreset = 1; optind = 1; /* initialize getopt */ | |
181 | while (not_fcnumber(argv[optind]) && | |
182 | (ch = getopt(argc, argv, ":e:lnrs")) != EOF) | |
183 | switch ((char)ch) { | |
184 | case 'e': | |
185 | editor = optarg; | |
186 | break; | |
187 | case 'l': | |
188 | lflg = 1; | |
189 | break; | |
190 | case 'n': | |
191 | nflg = 1; | |
192 | break; | |
193 | case 'r': | |
194 | rflg = 1; | |
195 | break; | |
196 | case 's': | |
197 | sflg = 1; | |
198 | break; | |
199 | case ':': | |
200 | error("option -%c expects argument", optopt); | |
201 | case '?': | |
202 | default: | |
203 | error("unknown option: -%c", optopt); | |
204 | } | |
205 | argc -= optind, argv += optind; | |
206 | ||
207 | /* | |
208 | * If executing... | |
209 | */ | |
210 | if (lflg == 0 || editor || sflg) { | |
211 | lflg = 0; /* ignore */ | |
212 | editfile[0] = '\0'; | |
213 | /* | |
214 | * Catch interrupts to reset active counter and | |
215 | * cleanup temp files. | |
216 | */ | |
217 | if (setjmp(jmploc.loc)) { | |
218 | active = 0; | |
219 | if (*editfile) | |
220 | unlink(editfile); | |
221 | handler = savehandler; | |
222 | longjmp(handler->loc, 1); | |
223 | } | |
224 | savehandler = handler; | |
225 | handler = &jmploc; | |
226 | if (++active > MAXHISTLOOPS) { | |
227 | active = 0; | |
228 | displayhist = 0; | |
229 | error("called recursively too many times"); | |
230 | } | |
231 | /* | |
232 | * Set editor. | |
233 | */ | |
234 | if (sflg == 0) { | |
235 | if (editor == NULL && | |
4fcca4ff MT |
236 | (editor = bltinlookup("FCEDIT", 1)) == NULL && |
237 | (editor = bltinlookup("EDITOR", 1)) == NULL) | |
f7280c66 MT |
238 | editor = DEFEDITOR; |
239 | if (editor[0] == '-' && editor[1] == '\0') { | |
240 | sflg = 1; /* no edit */ | |
241 | editor = NULL; | |
242 | } | |
243 | } | |
244 | } | |
245 | ||
246 | /* | |
247 | * If executing, parse [old=new] now | |
248 | */ | |
249 | if (lflg == 0 && argc > 0 && | |
250 | ((repl = strchr(argv[0], '=')) != NULL)) { | |
251 | pat = argv[0]; | |
252 | *repl++ = '\0'; | |
253 | argc--, argv++; | |
254 | } | |
255 | /* | |
256 | * determine [first] and [last] | |
257 | */ | |
258 | switch (argc) { | |
259 | case 0: | |
260 | firststr = lflg ? "-16" : "-1"; | |
261 | laststr = "-1"; | |
262 | break; | |
263 | case 1: | |
264 | firststr = argv[0]; | |
265 | laststr = lflg ? "-1" : argv[0]; | |
266 | break; | |
267 | case 2: | |
268 | firststr = argv[0]; | |
269 | laststr = argv[1]; | |
270 | break; | |
271 | default: | |
272 | error("too many args"); | |
273 | } | |
274 | /* | |
275 | * Turn into event numbers. | |
276 | */ | |
277 | first = str_to_event(firststr, 0); | |
278 | last = str_to_event(laststr, 1); | |
279 | ||
280 | if (rflg) { | |
281 | i = last; | |
282 | last = first; | |
283 | first = i; | |
284 | } | |
285 | /* | |
286 | * XXX - this should not depend on the event numbers | |
287 | * always increasing. Add sequence numbers or offset | |
288 | * to the history element in next (diskbased) release. | |
289 | */ | |
290 | direction = first < last ? H_PREV : H_NEXT; | |
291 | ||
292 | /* | |
293 | * If editing, grab a temp file. | |
294 | */ | |
295 | if (editor) { | |
296 | int fd; | |
297 | INTOFF; /* easier */ | |
298 | sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP); | |
299 | if ((fd = mkstemp(editfile)) < 0) | |
300 | error("can't create temporary file %s", editfile); | |
301 | if ((efp = fdopen(fd, "w")) == NULL) { | |
302 | close(fd); | |
303 | error("can't allocate stdio buffer for temp\n"); | |
304 | } | |
305 | } | |
306 | ||
307 | /* | |
308 | * Loop through selected history events. If listing or executing, | |
309 | * do it now. Otherwise, put into temp file and call the editor | |
310 | * after. | |
311 | * | |
312 | * The history interface needs rethinking, as the following | |
313 | * convolutions will demonstrate. | |
314 | */ | |
315 | history(hist, H_FIRST); | |
316 | he = history(hist, H_NEXT_EVENT, first); | |
317 | for (;he != NULL; he = history(hist, direction)) { | |
318 | if (lflg) { | |
319 | if (!nflg) | |
320 | out1fmt("%5d ", he->num); | |
321 | out1str(he->str); | |
322 | } else { | |
323 | char *s = pat ? | |
324 | fc_replace(he->str, pat, repl) : (char *)he->str; | |
325 | ||
326 | if (sflg) { | |
327 | if (displayhist) { | |
328 | out2str(s); | |
329 | } | |
330 | evalstring(s); | |
331 | if (displayhist && hist) { | |
332 | /* | |
333 | * XXX what about recursive and | |
334 | * relative histnums. | |
335 | */ | |
336 | history(hist, H_ENTER, s); | |
337 | } | |
338 | } else | |
339 | fputs(s, efp); | |
340 | } | |
341 | /* | |
342 | * At end? (if we were to loose last, we'd sure be | |
343 | * messed up). | |
344 | */ | |
345 | if (he->num == last) | |
346 | break; | |
347 | } | |
348 | if (editor) { | |
349 | char *editcmd; | |
350 | ||
351 | fclose(efp); | |
352 | editcmd = stalloc(strlen(editor) + strlen(editfile) + 2); | |
353 | sprintf(editcmd, "%s %s", editor, editfile); | |
354 | evalstring(editcmd); /* XXX - should use no JC command */ | |
355 | INTON; | |
356 | readcmdfile(editfile); /* XXX - should read back - quick tst */ | |
357 | unlink(editfile); | |
358 | } | |
359 | ||
360 | if (lflg == 0 && active > 0) | |
361 | --active; | |
362 | if (displayhist) | |
363 | displayhist = 0; | |
13b3e634 | 364 | return 0; |
f7280c66 MT |
365 | } |
366 | ||
367 | STATIC char * | |
368 | fc_replace(s, p, r) | |
369 | const char *s; | |
370 | char *p, *r; | |
371 | { | |
372 | char *dest; | |
373 | int plen = strlen(p); | |
374 | ||
375 | STARTSTACKSTR(dest); | |
376 | while (*s) { | |
377 | if (*s == *p && strncmp(s, p, plen) == 0) { | |
378 | while (*r) | |
379 | STPUTC(*r++, dest); | |
380 | s += plen; | |
381 | *p = '\0'; /* so no more matches */ | |
382 | } else | |
383 | STPUTC(*s++, dest); | |
384 | } | |
385 | STACKSTRNUL(dest); | |
386 | dest = grabstackstr(dest); | |
387 | ||
388 | return (dest); | |
389 | } | |
390 | ||
13b3e634 | 391 | int |
f7280c66 MT |
392 | not_fcnumber(s) |
393 | char *s; | |
394 | { | |
13b3e634 CZ |
395 | if (s == NULL) |
396 | return 0; | |
f7280c66 MT |
397 | if (*s == '-') |
398 | s++; | |
399 | return (!is_number(s)); | |
400 | } | |
401 | ||
13b3e634 | 402 | int |
f7280c66 MT |
403 | str_to_event(str, last) |
404 | char *str; | |
405 | int last; | |
406 | { | |
407 | const HistEvent *he; | |
408 | char *s = str; | |
409 | int relative = 0; | |
13b3e634 | 410 | int i; |
f7280c66 MT |
411 | |
412 | he = history(hist, H_FIRST); | |
413 | switch (*s) { | |
414 | case '-': | |
415 | relative = 1; | |
416 | /*FALLTHROUGH*/ | |
417 | case '+': | |
418 | s++; | |
419 | } | |
420 | if (is_number(s)) { | |
421 | i = atoi(s); | |
422 | if (relative) { | |
423 | while (he != NULL && i--) { | |
424 | he = history(hist, H_NEXT); | |
425 | } | |
426 | if (he == NULL) | |
427 | he = history(hist, H_LAST); | |
428 | } else { | |
429 | he = history(hist, H_NEXT_EVENT, i); | |
430 | if (he == NULL) { | |
431 | /* | |
432 | * the notion of first and last is | |
433 | * backwards to that of the history package | |
434 | */ | |
435 | he = history(hist, last ? H_FIRST : H_LAST); | |
436 | } | |
437 | } | |
438 | if (he == NULL) | |
439 | error("history number %s not found (internal error)", | |
440 | str); | |
441 | } else { | |
442 | /* | |
443 | * pattern | |
444 | */ | |
ba8ff910 | 445 | he = history(hist, H_PREV_STR, str); |
f7280c66 MT |
446 | if (he == NULL) |
447 | error("history pattern not found: %s", str); | |
dc06984c | 448 | } |
f7280c66 | 449 | return (he->num); |
dc06984c | 450 | } |