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36 * @(#)histedit.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/histedit.c,v 1.43 2011/06/13 21:03:27 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 *);
74 * Set history and editing status. Called whenever the status may
75 * have changed (figures out what to do).
81 #define editing (Eflag || Vflag)
89 hist = history_init();
93 sethistsize(histsizeval());
95 out2fmt_flush("sh: can't initialize history\n");
97 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
105 el_in = fdopen(0, "r");
107 el_err = fdopen(1, "w");
109 el_out = fdopen(2, "w");
110 if (el_in == NULL || el_err == NULL || el_out == NULL)
112 term = lookupvar("TERM");
114 if (setenv("TERM", term, 1) == -1)
115 error("setenv: cannot set TERM=1");
119 el = el_init(arg0, el_in, el_out, el_err);
122 el_set(el, EL_HIST, history, hist);
123 el_set(el, EL_PROMPT, getprompt);
124 el_set(el, EL_ADDFN, "rl-complete",
125 "ReadLine compatible completion function",
129 out2fmt_flush("sh: can't initialize editing\n");
132 } else if (!editing && el) {
140 el_set(el, EL_EDITOR, "vi");
142 el_set(el, EL_EDITOR, "emacs");
143 el_set(el, EL_BIND, "^I",
144 tabcomplete ? "rl-complete" : "ed-insert", NULL);
149 if (el) { /* no editing if not interactive */
163 sethistsize(const char *hs)
169 if (hs == NULL || *hs == '\0' ||
170 (histsize = atoi(hs)) < 0)
172 history(hist, &he, H_SETSIZE, histsize);
173 history(hist, &he, H_SETUNIQUE, 1);
178 setterm(const char *term)
180 if (rootshell && el != NULL && term != NULL)
181 el_set(el, EL_TERMINAL, term);
185 histcmd(int argc, char **argv)
188 const char *volatile editor = NULL;
190 volatile int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
192 const char *firststr = NULL, *laststr = NULL;
193 int first, last, direction;
194 char *pat = NULL, *repl = NULL;
195 static int active = 0;
196 struct jmploc jmploc;
197 struct jmploc *savehandler;
198 char editfilestr[PATH_MAX];
199 char *volatile editfile;
204 error("history not active");
207 error("missing history argument");
209 optreset = 1; optind = 1; /* initialize getopt */
211 while (not_fcnumber(argv[optind]) &&
212 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
230 error("option -%c expects argument", optopt);
233 error("unknown option: -%c", optopt);
235 argc -= optind, argv += optind;
237 savehandler = handler;
241 if (lflg == 0 || editor || sflg) {
242 lflg = 0; /* ignore */
245 * Catch interrupts to reset active counter and
246 * cleanup temp files.
248 if (setjmp(jmploc.loc)) {
252 handler = savehandler;
253 longjmp(handler->loc, 1);
256 if (++active > MAXHISTLOOPS) {
259 error("called recursively too many times");
265 if (editor == NULL &&
266 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
267 (editor = bltinlookup("EDITOR", 1)) == NULL)
269 if (editor[0] == '-' && editor[1] == '\0') {
270 sflg = 1; /* no edit */
277 * If executing, parse [old=new] now
279 if (lflg == 0 && argc > 0 &&
280 ((repl = strchr(argv[0], '=')) != NULL)) {
286 * determine [first] and [last]
290 firststr = lflg ? "-16" : "-1";
295 laststr = lflg ? "-1" : argv[0];
302 error("too many arguments");
305 * Turn into event numbers.
307 first = str_to_event(firststr, 0);
308 last = str_to_event(laststr, 1);
316 * XXX - this should not depend on the event numbers
317 * always increasing. Add sequence numbers or offset
318 * to the history element in next (diskbased) release.
320 direction = first < last ? H_PREV : H_NEXT;
323 * If editing, grab a temp file.
328 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
329 if ((fd = mkstemp(editfilestr)) < 0)
330 error("can't create temporary file %s", editfile);
331 editfile = editfilestr;
332 if ((efp = fdopen(fd, "w")) == NULL) {
334 error("Out of space");
339 * Loop through selected history events. If listing or executing,
340 * do it now. Otherwise, put into temp file and call the editor
343 * The history interface needs rethinking, as the following
344 * convolutions will demonstrate.
346 history(hist, &he, H_FIRST);
347 retval = history(hist, &he, H_NEXT_EVENT, first);
348 for (;retval != -1; retval = history(hist, &he, direction)) {
351 out1fmt("%5d ", he.num);
355 fc_replace(he.str, pat, repl) :
356 __DECONST(char *, he.str);
364 if (displayhist && hist) {
366 * XXX what about recursive and
370 history(hist, &he, H_ENTER, s);
372 * XXX H_ENTER moves the internal
373 * cursor, set it back to the current
376 retval = history(hist, &he,
377 H_NEXT_EVENT, oldhistnum);
383 * At end? (if we were to lose last, we'd sure be
393 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
394 sprintf(editcmd, "%s %s", editor, editfile);
395 evalstring(editcmd, 0); /* XXX - should use no JC command */
397 readcmdfile(editfile); /* XXX - should read back - quick tst */
401 if (lflg == 0 && active > 0)
405 handler = savehandler;
410 fc_replace(const char *s, char *p, char *r)
413 int plen = strlen(p);
417 if (*s == *p && strncmp(s, p, plen) == 0) {
420 *p = '\0'; /* so no more matches */
425 dest = grabstackstr(dest);
431 not_fcnumber(const char *s)
437 return (!is_number(s));
441 str_to_event(const char *str, int last)
448 retval = history(hist, &he, H_FIRST);
459 while (retval != -1 && i--) {
460 retval = history(hist, &he, H_NEXT);
463 retval = history(hist, &he, H_LAST);
465 retval = history(hist, &he, H_NEXT_EVENT, i);
468 * the notion of first and last is
469 * backwards to that of the history package
471 retval = history(hist, &he, last ? H_FIRST : H_LAST);
475 error("history number %s not found (internal error)",
481 retval = history(hist, &he, H_PREV_STR, str);
483 error("history pattern not found: %s", str);
489 bindcmd(int argc, char **argv)
493 error("line editing is disabled");
494 return (el_parse(el, argc, (const char **)argv));
501 histcmd(int argc __unused, char **argv __unused)
504 error("not compiled with history support");
510 bindcmd(int argc __unused, char **argv __unused)
513 error("not compiled with line editing support");