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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 1.11 2007/01/14 17:29:58 pavalos Exp $
41 #include <sys/param.h>
48 * Editline and history functions (and glue).
58 #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);
129 out2str("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");
147 if (el) { /* no editing if not interactive */
161 sethistsize(const char *hs)
167 if (hs == NULL || *hs == '\0' ||
168 (histsize = atoi(hs)) < 0)
170 history(hist, &he, H_SETSIZE, histsize);
175 histcmd(int argc, char **argv)
178 const char *volatile editor = NULL;
180 volatile int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
182 const char *firststr = NULL, *laststr = NULL;
183 int first, last, direction;
184 char *pat = NULL, *repl = NULL;
185 static int active = 0;
186 struct jmploc jmploc;
187 struct jmploc *volatile savehandler;
188 char editfile[PATH_MAX];
193 error("history not active");
196 error("missing history argument");
198 optreset = 1; optind = 1; /* initialize getopt */
200 while (not_fcnumber(argv[optind]) &&
201 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
219 error("option -%c expects argument", optopt);
222 error("unknown option: -%c", optopt);
224 argc -= optind, argv += optind;
229 if (lflg == 0 || editor || sflg) {
230 lflg = 0; /* ignore */
233 * Catch interrupts to reset active counter and
234 * cleanup temp files.
236 if (setjmp(jmploc.loc)) {
240 handler = savehandler;
241 longjmp(handler->loc, 1);
243 savehandler = handler;
245 if (++active > MAXHISTLOOPS) {
248 error("called recursively too many times");
254 if (editor == NULL &&
255 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
256 (editor = bltinlookup("EDITOR", 1)) == NULL)
258 if (editor[0] == '-' && editor[1] == '\0') {
259 sflg = 1; /* no edit */
266 * If executing, parse [old=new] now
268 if (lflg == 0 && argc > 0 &&
269 ((repl = strchr(argv[0], '=')) != NULL)) {
275 * determine [first] and [last]
279 firststr = lflg ? "-16" : "-1";
284 laststr = lflg ? "-1" : argv[0];
291 error("too many args");
294 * Turn into event numbers.
296 first = str_to_event(firststr, 0);
297 last = str_to_event(laststr, 1);
305 * XXX - this should not depend on the event numbers
306 * always increasing. Add sequence numbers or offset
307 * to the history element in next (diskbased) release.
309 direction = first < last ? H_PREV : H_NEXT;
312 * If editing, grab a temp file.
317 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
318 if ((fd = mkstemp(editfile)) < 0)
319 error("can't create temporary file %s", editfile);
320 if ((efp = fdopen(fd, "w")) == NULL) {
322 error("can't allocate stdio buffer for temp");
327 * Loop through selected history events. If listing or executing,
328 * do it now. Otherwise, put into temp file and call the editor
331 * The history interface needs rethinking, as the following
332 * convolutions will demonstrate.
334 history(hist, &he, H_FIRST);
335 retval = history(hist, &he, H_NEXT_EVENT, first);
336 for (;retval != -1; retval = history(hist, &he, direction)) {
339 out1fmt("%5d ", he.num);
342 const char *s = pat ?
343 fc_replace(he.str, pat, repl) : he.str;
349 evalstring(strcpy(stalloc(strlen(s) + 1), s));
350 if (displayhist && hist) {
352 * XXX what about recursive and
356 history(hist, &he, H_ENTER, s);
358 * XXX H_ENTER moves the internal
359 * cursor, set it back to the current
362 retval = history(hist, &he,
363 H_NEXT_EVENT, oldhistnum);
369 * At end? (if we were to lose last, we'd sure be
379 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
380 sprintf(editcmd, "%s %s", editor, editfile);
381 evalstring(editcmd); /* XXX - should use no JC command */
383 readcmdfile(editfile); /* XXX - should read back - quick tst */
387 if (lflg == 0 && active > 0)
395 fc_replace(const char *s, char *p, char *r)
398 int plen = strlen(p);
402 if (*s == *p && strncmp(s, p, plen) == 0) {
406 *p = '\0'; /* so no more matches */
411 dest = grabstackstr(dest);
417 not_fcnumber(char *s)
423 return (!is_number(s));
427 str_to_event(const char *str, int last)
434 retval = history(hist, &he, H_FIRST);
445 while (retval != -1 && i--) {
446 retval = history(hist, &he, H_NEXT);
449 retval = history(hist, &he, H_LAST);
451 retval = history(hist, &he, H_NEXT_EVENT, i);
454 * the notion of first and last is
455 * backwards to that of the history package
457 retval = history(hist, &he, last ? H_FIRST : H_LAST);
461 error("history number %s not found (internal error)",
467 retval = history(hist, &he, H_PREV_STR, str);
469 error("history pattern not found: %s", str);
475 bindcmd(int argc, char **argv)
479 error("line editing is disabled");
480 return (el_parse(el, argc, (const char **)argv));
487 histcmd(int argc, char **argv)
490 error("not compiled with history support");
496 bindcmd(int argc, char **argv)
499 error("not compiled with line editing support");