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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;
70 unsigned char _el_fn_complete(EditLine *, int);
72 STATIC char *fc_replace(const char *, char *, char *);
75 * Set history and editing status. Called whenever the status may
76 * 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_err = fdopen(1, "w");
110 el_out = fdopen(2, "w");
111 if (el_in == NULL || el_err == NULL || el_out == NULL)
113 term = lookupvar("TERM");
115 if (setenv("TERM", term, 1) == -1)
116 error("setenv: cannot set TERM=1");
121 if (shname[0] == '-')
123 el = el_init(arg0, el_in, el_out, el_err);
126 el_set(el, EL_HIST, history, hist);
127 el_set(el, EL_PROMPT, getprompt);
128 el_set(el, EL_ADDFN, "rl-complete",
129 "ReadLine compatible completion function",
133 out2str("sh: can't initialize editing\n");
136 } else if (!editing && el) {
144 el_set(el, EL_EDITOR, "vi");
146 el_set(el, EL_EDITOR, "emacs");
147 el_set(el, EL_BIND, "^I",
148 tabcomplete ? "rl-complete" : "ed-insert", NULL);
153 if (el) { /* no editing if not interactive */
167 sethistsize(const char *hs)
173 if (hs == NULL || *hs == '\0' ||
174 (histsize = atoi(hs)) < 0)
176 history(hist, &he, H_SETSIZE, histsize);
177 history(hist, &he, H_SETUNIQUE, 1);
182 histcmd(int argc, char **argv)
185 const char *volatile editor = NULL;
187 volatile int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
189 const char *firststr = NULL, *laststr = NULL;
190 int first, last, direction;
191 char *pat = NULL, *repl = NULL;
192 static int active = 0;
193 struct jmploc jmploc;
194 struct jmploc *volatile savehandler;
195 char editfile[PATH_MAX];
200 error("history not active");
203 error("missing history argument");
205 optreset = 1; optind = 1; /* initialize getopt */
207 while (not_fcnumber(argv[optind]) &&
208 (ch = getopt(argc, argv, ":e:lnrs")) != -1)
226 error("option -%c expects argument", optopt);
229 error("unknown option: -%c", optopt);
231 argc -= optind, argv += optind;
236 if (lflg == 0 || editor || sflg) {
237 lflg = 0; /* ignore */
240 * Catch interrupts to reset active counter and
241 * cleanup temp files.
243 if (setjmp(jmploc.loc)) {
247 handler = savehandler;
248 longjmp(handler->loc, 1);
250 savehandler = handler;
252 if (++active > MAXHISTLOOPS) {
255 error("called recursively too many times");
261 if (editor == NULL &&
262 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
263 (editor = bltinlookup("EDITOR", 1)) == NULL)
265 if (editor[0] == '-' && editor[1] == '\0') {
266 sflg = 1; /* no edit */
273 * If executing, parse [old=new] now
275 if (lflg == 0 && argc > 0 &&
276 ((repl = strchr(argv[0], '=')) != NULL)) {
282 * determine [first] and [last]
286 firststr = lflg ? "-16" : "-1";
291 laststr = lflg ? "-1" : argv[0];
298 error("too many args");
301 * Turn into event numbers.
303 first = str_to_event(firststr, 0);
304 last = str_to_event(laststr, 1);
312 * XXX - this should not depend on the event numbers
313 * always increasing. Add sequence numbers or offset
314 * to the history element in next (diskbased) release.
316 direction = first < last ? H_PREV : H_NEXT;
319 * If editing, grab a temp file.
324 sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
325 if ((fd = mkstemp(editfile)) < 0)
326 error("can't create temporary file %s", editfile);
327 if ((efp = fdopen(fd, "w")) == NULL) {
329 error("can't allocate stdio buffer for temp");
334 * Loop through selected history events. If listing or executing,
335 * do it now. Otherwise, put into temp file and call the editor
338 * The history interface needs rethinking, as the following
339 * convolutions will demonstrate.
341 history(hist, &he, H_FIRST);
342 retval = history(hist, &he, H_NEXT_EVENT, first);
343 for (;retval != -1; retval = history(hist, &he, direction)) {
346 out1fmt("%5d ", he.num);
349 const char *s = pat ?
350 fc_replace(he.str, pat, repl) : he.str;
356 evalstring(strcpy(stalloc(strlen(s) + 1), s));
357 if (displayhist && hist) {
359 * XXX what about recursive and
363 history(hist, &he, H_ENTER, s);
365 * XXX H_ENTER moves the internal
366 * cursor, set it back to the current
369 retval = history(hist, &he,
370 H_NEXT_EVENT, oldhistnum);
376 * At end? (if we were to lose last, we'd sure be
386 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
387 sprintf(editcmd, "%s %s", editor, editfile);
388 evalstring(editcmd); /* XXX - should use no JC command */
390 readcmdfile(editfile); /* XXX - should read back - quick tst */
394 if (lflg == 0 && active > 0)
402 fc_replace(const char *s, char *p, char *r)
405 int plen = strlen(p);
409 if (*s == *p && strncmp(s, p, plen) == 0) {
413 *p = '\0'; /* so no more matches */
418 dest = grabstackstr(dest);
424 not_fcnumber(char *s)
430 return (!is_number(s));
434 str_to_event(const char *str, int last)
441 retval = history(hist, &he, H_FIRST);
452 while (retval != -1 && i--) {
453 retval = history(hist, &he, H_NEXT);
456 retval = history(hist, &he, H_LAST);
458 retval = history(hist, &he, H_NEXT_EVENT, i);
461 * the notion of first and last is
462 * backwards to that of the history package
464 retval = history(hist, &he, last ? H_FIRST : H_LAST);
468 error("history number %s not found (internal error)",
474 retval = history(hist, &he, H_PREV_STR, str);
476 error("history pattern not found: %s", str);
482 bindcmd(int argc, char **argv)
486 error("line editing is disabled");
487 return (el_parse(el, argc, (const char **)argv));
494 histcmd(int argc __unused, char **argv __unused)
497 error("not compiled with history support");
503 bindcmd(int argc __unused, char **argv __unused)
506 error("not compiled with line editing support");