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36 * @(#)histedit.c 8.2 (Berkeley) 5/4/95
37 * $FreeBSD: src/bin/sh/histedit.c,v 1.13.2.4 2002/08/27 01:36:28 tjr Exp $
38 * $DragonFly: src/bin/sh/histedit.c,v 1.7 2006/01/17 15:06:26 corecode 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;
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).
82 #define editing (Eflag || Vflag)
90 hist = history_init();
94 sethistsize(histsizeval());
96 out2str("sh: can't initialize history\n");
98 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
106 el_in = fdopen(0, "r");
108 el_out = fdopen(2, "w");
109 if (el_in == 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 * This command is provided since POSIX decided to standardize
176 * the Korn shell fc command. Oh well...
179 histcmd(int argc, char **argv)
182 const char *editor = NULL;
184 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
186 const char *firststr, *laststr;
187 int first, last, direction;
188 char *pat = NULL, *repl; /* ksh "fc old=new" crap */
189 static int active = 0;
190 struct jmploc jmploc;
191 struct jmploc *volatile savehandler;
192 char editfile[PATH_MAX];
195 /* Avoid longjmp clobbering */
211 error("history not active");
214 error("missing history argument");
216 optreset = 1; optind = 1; /* initialize getopt */
218 while (not_fcnumber(argv[optind]) &&
219 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
237 error("option -%c expects argument", optopt);
240 error("unknown option: -%c", optopt);
242 argc -= optind, argv += optind;
247 if (lflg == 0 || editor || sflg) {
248 lflg = 0; /* ignore */
251 * Catch interrupts to reset active counter and
252 * cleanup temp files.
254 if (setjmp(jmploc.loc)) {
258 handler = savehandler;
259 longjmp(handler->loc, 1);
261 savehandler = handler;
263 if (++active > MAXHISTLOOPS) {
266 error("called recursively too many times");
272 if (editor == NULL &&
273 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
274 (editor = bltinlookup("EDITOR", 1)) == NULL)
276 if (editor[0] == '-' && editor[1] == '\0') {
277 sflg = 1; /* no edit */
284 * If executing, parse [old=new] now
286 if (lflg == 0 && argc > 0 &&
287 ((repl = strchr(argv[0], '=')) != NULL)) {
293 * determine [first] and [last]
297 firststr = lflg ? "-16" : "-1";
302 laststr = lflg ? "-1" : argv[0];
309 error("too many args");
312 * Turn into event numbers.
314 first = str_to_event(firststr, 0);
315 last = str_to_event(laststr, 1);
323 * XXX - this should not depend on the event numbers
324 * always increasing. Add sequence numbers or offset
325 * to the history element in next (diskbased) release.
327 direction = first < last ? H_PREV : H_NEXT;
330 * If editing, grab a temp file.
335 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
336 if ((fd = mkstemp(editfile)) < 0)
337 error("can't create temporary file %s", editfile);
338 if ((efp = fdopen(fd, "w")) == NULL) {
340 error("can't allocate stdio buffer for temp");
345 * Loop through selected history events. If listing or executing,
346 * do it now. Otherwise, put into temp file and call the editor
349 * The history interface needs rethinking, as the following
350 * convolutions will demonstrate.
352 history(hist, &he, H_FIRST);
353 retval = history(hist, &he, H_NEXT_EVENT, first);
354 for (;retval != -1; retval = history(hist, &he, direction)) {
357 out1fmt("%5d ", he.num);
361 fc_replace(he.str, pat, repl) : (char *)he.str;
368 if (displayhist && hist) {
370 * XXX what about recursive and
373 history(hist, &he, H_ENTER, s);
379 * At end? (if we were to loose last, we'd sure be
389 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
390 sprintf(editcmd, "%s %s", editor, editfile);
391 evalstring(editcmd); /* XXX - should use no JC command */
393 readcmdfile(editfile); /* XXX - should read back - quick tst */
397 if (lflg == 0 && active > 0)
405 fc_replace(const char *s, char *p, char *r)
408 int plen = strlen(p);
412 if (*s == *p && strncmp(s, p, plen) == 0) {
416 *p = '\0'; /* so no more matches */
421 dest = grabstackstr(dest);
427 not_fcnumber(char *s)
433 return (!is_number(s));
437 str_to_event(const char *str, int last)
444 history(hist, &he, H_FIRST);
455 while (retval != -1 && i--) {
456 retval = history(hist, &he, H_NEXT);
459 retval = history(hist, &he, H_LAST);
461 retval = history(hist, &he, H_NEXT_EVENT, i);
464 * the notion of first and last is
465 * backwards to that of the history package
467 retval = history(hist, &he, last ? H_FIRST : H_LAST);
471 error("history number %s not found (internal error)",
477 retval = history(hist, &he, H_PREV_STR, str);
479 error("history pattern not found: %s", str);
485 bindcmd(int argc, char **argv)
489 error("line editing is disabled");
490 return (el_parse(el, argc, (const char **)argv));
497 histcmd(int argc, char **argv)
500 error("not compiled with history support");
506 bindcmd(int argc, char **argv)
509 error("not compiled with line editing support");