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36 * @(#)histedit.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/histedit.c,v 1.29 2006/08/04 07:56:31 yar Exp $
38 * $DragonFly: src/bin/sh/histedit.c,v 1.12 2008/02/13 15:13:37 matthias Exp $
41 #include <sys/param.h>
48 * Editline and history functions (and glue).
57 #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 out2str("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");
120 if (shname[0] == '-')
122 el = el_init(arg0, el_in, el_out, el_err);
125 el_set(el, EL_HIST, history, hist);
126 el_set(el, EL_PROMPT, getprompt);
127 el_set(el, EL_ADDFN, "rl-complete",
128 "ReadLine compatible completion function",
132 out2str("sh: can't initialize editing\n");
135 } else if (!editing && el) {
143 el_set(el, EL_EDITOR, "vi");
145 el_set(el, EL_EDITOR, "emacs");
146 el_set(el, EL_BIND, "^I",
147 tabcomplete ? "rl-complete" : "ed-insert", NULL);
152 if (el) { /* no editing if not interactive */
166 sethistsize(const char *hs)
172 if (hs == NULL || *hs == '\0' ||
173 (histsize = atoi(hs)) < 0)
175 history(hist, &he, H_SETSIZE, histsize);
176 history(hist, &he, H_SETUNIQUE, 1);
181 histcmd(int argc, char **argv)
184 const char *volatile editor = NULL;
186 volatile int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
188 const char *firststr = NULL, *laststr = NULL;
189 int first, last, direction;
190 char *pat = NULL, *repl = NULL;
191 static int active = 0;
192 struct jmploc jmploc;
193 struct jmploc *volatile savehandler;
194 char editfile[PATH_MAX];
199 error("history not active");
202 error("missing history argument");
204 optreset = 1; optind = 1; /* initialize getopt */
206 while (not_fcnumber(argv[optind]) &&
207 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
225 error("option -%c expects argument", optopt);
228 error("unknown option: -%c", optopt);
230 argc -= optind, argv += optind;
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);
249 savehandler = handler;
251 if (++active > MAXHISTLOOPS) {
254 error("called recursively too many times");
260 if (editor == NULL &&
261 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
262 (editor = bltinlookup("EDITOR", 1)) == NULL)
264 if (editor[0] == '-' && editor[1] == '\0') {
265 sflg = 1; /* no edit */
272 * If executing, parse [old=new] now
274 if (lflg == 0 && argc > 0 &&
275 ((repl = strchr(argv[0], '=')) != NULL)) {
281 * determine [first] and [last]
285 firststr = lflg ? "-16" : "-1";
290 laststr = lflg ? "-1" : argv[0];
297 error("too many args");
300 * Turn into event numbers.
302 first = str_to_event(firststr, 0);
303 last = str_to_event(laststr, 1);
311 * XXX - this should not depend on the event numbers
312 * always increasing. Add sequence numbers or offset
313 * to the history element in next (diskbased) release.
315 direction = first < last ? H_PREV : H_NEXT;
318 * If editing, grab a temp file.
323 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
324 if ((fd = mkstemp(editfile)) < 0)
325 error("can't create temporary file %s", editfile);
326 if ((efp = fdopen(fd, "w")) == NULL) {
328 error("can't allocate stdio buffer for temp");
333 * Loop through selected history events. If listing or executing,
334 * do it now. Otherwise, put into temp file and call the editor
337 * The history interface needs rethinking, as the following
338 * convolutions will demonstrate.
340 history(hist, &he, H_FIRST);
341 retval = history(hist, &he, H_NEXT_EVENT, first);
342 for (;retval != -1; retval = history(hist, &he, direction)) {
345 out1fmt("%5d ", he.num);
348 const char *s = pat ?
349 fc_replace(he.str, pat, repl) : he.str;
355 evalstring(strcpy(stalloc(strlen(s) + 1), s));
356 if (displayhist && hist) {
358 * XXX what about recursive and
362 history(hist, &he, H_ENTER, s);
364 * XXX H_ENTER moves the internal
365 * cursor, set it back to the current
368 retval = history(hist, &he,
369 H_NEXT_EVENT, oldhistnum);
375 * At end? (if we were to lose last, we'd sure be
385 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
386 sprintf(editcmd, "%s %s", editor, editfile);
387 evalstring(editcmd); /* XXX - should use no JC command */
389 readcmdfile(editfile); /* XXX - should read back - quick tst */
393 if (lflg == 0 && active > 0)
401 fc_replace(const char *s, char *p, char *r)
404 int plen = strlen(p);
408 if (*s == *p && strncmp(s, p, plen) == 0) {
412 *p = '\0'; /* so no more matches */
417 dest = grabstackstr(dest);
423 not_fcnumber(char *s)
429 return (!is_number(s));
433 str_to_event(const char *str, int last)
440 retval = history(hist, &he, H_FIRST);
451 while (retval != -1 && i--) {
452 retval = history(hist, &he, H_NEXT);
455 retval = history(hist, &he, H_LAST);
457 retval = history(hist, &he, H_NEXT_EVENT, i);
460 * the notion of first and last is
461 * backwards to that of the history package
463 retval = history(hist, &he, last ? H_FIRST : H_LAST);
467 error("history number %s not found (internal error)",
473 retval = history(hist, &he, H_PREV_STR, str);
475 error("history pattern not found: %s", str);
481 bindcmd(int argc, char **argv)
485 error("line editing is disabled");
486 return (el_parse(el, argc, (const char **)argv));
493 histcmd(int argc __unused, char **argv __unused)
496 error("not compiled with history support");
502 bindcmd(int argc __unused, char **argv __unused)
505 error("not compiled with line editing support");