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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 1.2 2003/06/17 04:22:50 dillon 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).
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) ??? */
103 el_in = fdopen(0, "r");
105 el_out = fdopen(2, "w");
106 if (el_in == NULL || el_out == NULL)
108 el = el_init(arg0, el_in, el_out);
111 el_set(el, EL_HIST, history, hist);
112 el_set(el, EL_PROMPT, getprompt);
115 out2str("sh: can't initialize editing\n");
118 } else if (!editing && el) {
126 el_set(el, EL_EDITOR, "vi");
128 el_set(el, EL_EDITOR, "emacs");
133 if (el) { /* no editing if not interactive */
153 if (hs == NULL || *hs == '\0' ||
154 (histsize = atoi(hs)) < 0)
156 history(hist, H_EVENT, histsize);
161 * This command is provided since POSIX decided to standardize
162 * the Korn shell fc command. Oh well...
165 histcmd(int argc, char **argv)
170 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
172 char *firststr, *laststr;
173 int first, last, direction;
174 char *pat = NULL, *repl; /* ksh "fc old=new" crap */
175 static int active = 0;
176 struct jmploc jmploc;
177 struct jmploc *volatile savehandler;
178 char editfile[PATH_MAX];
182 /* Avoid longjmp clobbering */
198 error("history not active");
201 error("missing history argument");
203 optreset = 1; optind = 1; /* initialize getopt */
205 while (not_fcnumber(argv[optind]) &&
206 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
224 error("option -%c expects argument", optopt);
227 error("unknown option: -%c", optopt);
229 argc -= optind, argv += optind;
234 if (lflg == 0 || editor || sflg) {
235 lflg = 0; /* ignore */
238 * Catch interrupts to reset active counter and
239 * cleanup temp files.
241 if (setjmp(jmploc.loc)) {
245 handler = savehandler;
246 longjmp(handler->loc, 1);
248 savehandler = handler;
250 if (++active > MAXHISTLOOPS) {
253 error("called recursively too many times");
259 if (editor == NULL &&
260 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
261 (editor = bltinlookup("EDITOR", 1)) == NULL)
263 if (editor[0] == '-' && editor[1] == '\0') {
264 sflg = 1; /* no edit */
271 * If executing, parse [old=new] now
273 if (lflg == 0 && argc > 0 &&
274 ((repl = strchr(argv[0], '=')) != NULL)) {
280 * determine [first] and [last]
284 firststr = lflg ? "-16" : "-1";
289 laststr = lflg ? "-1" : argv[0];
296 error("too many args");
299 * Turn into event numbers.
301 first = str_to_event(firststr, 0);
302 last = str_to_event(laststr, 1);
310 * XXX - this should not depend on the event numbers
311 * always increasing. Add sequence numbers or offset
312 * to the history element in next (diskbased) release.
314 direction = first < last ? H_PREV : H_NEXT;
317 * If editing, grab a temp file.
322 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
323 if ((fd = mkstemp(editfile)) < 0)
324 error("can't create temporary file %s", editfile);
325 if ((efp = fdopen(fd, "w")) == NULL) {
327 error("can't allocate stdio buffer for temp");
332 * Loop through selected history events. If listing or executing,
333 * do it now. Otherwise, put into temp file and call the editor
336 * The history interface needs rethinking, as the following
337 * convolutions will demonstrate.
339 history(hist, H_FIRST);
340 he = history(hist, H_NEXT_EVENT, first);
341 for (;he != NULL; he = history(hist, direction)) {
344 out1fmt("%5d ", he->num);
348 fc_replace(he->str, pat, repl) : (char *)he->str;
355 if (displayhist && hist) {
357 * XXX what about recursive and
360 history(hist, H_ENTER, s);
366 * At end? (if we were to loose last, we'd sure be
376 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
377 sprintf(editcmd, "%s %s", editor, editfile);
378 evalstring(editcmd); /* XXX - should use no JC command */
380 readcmdfile(editfile); /* XXX - should read back - quick tst */
384 if (lflg == 0 && active > 0)
392 fc_replace(const char *s, char *p, char *r)
395 int plen = strlen(p);
399 if (*s == *p && strncmp(s, p, plen) == 0) {
403 *p = '\0'; /* so no more matches */
408 dest = grabstackstr(dest);
414 not_fcnumber(char *s)
420 return (!is_number(s));
424 str_to_event(char *str, int last)
431 he = history(hist, H_FIRST);
442 while (he != NULL && i--) {
443 he = history(hist, H_NEXT);
446 he = history(hist, H_LAST);
448 he = history(hist, H_NEXT_EVENT, i);
451 * the notion of first and last is
452 * backwards to that of the history package
454 he = history(hist, last ? H_FIRST : H_LAST);
458 error("history number %s not found (internal error)",
464 he = history(hist, H_PREV_STR, str);
466 error("history pattern not found: %s", str);
472 bindcmd(int argc, char **argv)
476 error("line editing is disabled");
477 return (el_parse(el, argc, argv));
484 histcmd(int argc, char **argv)
487 error("not compiled with history support");
493 bindcmd(int argc, char **argv)
496 error("not compiled with line editing support");