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35 static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
48 * Editline and history functions (and glue).
58 #include "myhistedit.h"
64 #define MAXHISTLOOPS 4 /* max recursions through fc */
65 #define DEFEDITOR "ed" /* default editor *should* be $EDITOR */
67 History *hist; /* history cookie */
68 EditLine *el; /* editline cookie */
70 static FILE *el_in, *el_out, *el_err;
72 static char *fc_replace(const char *, char *, char *);
73 static int not_fcnumber(const char *);
74 static int str_to_event(const char *, int);
77 * Set history and editing status. Called whenever the status may
78 * have changed (figures out what to do).
84 #define editing (Eflag || Vflag)
92 hist = history_init();
96 sethistsize(histsizeval());
98 out2fmt_flush("sh: can't initialize history\n");
100 if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
108 el_in = fdopen(0, "r");
110 el_err = fdopen(1, "w");
112 el_out = fdopen(2, "w");
113 if (el_in == NULL || el_err == NULL || el_out == NULL)
115 term = lookupvar("TERM");
117 setenv("TERM", term, 1);
120 el = el_init(arg0, el_in, el_out, el_err);
123 el_set(el, EL_HIST, history, hist);
124 el_set(el, EL_PROMPT, getprompt);
125 el_set(el, EL_ADDFN, "sh-complete",
126 "Filename completion",
130 out2fmt_flush("sh: can't initialize editing\n");
133 } else if (!editing && el) {
141 el_set(el, EL_EDITOR, "vi");
143 el_set(el, EL_EDITOR, "emacs");
144 el_set(el, EL_BIND, "^I", "sh-complete", NULL);
149 if (el) { /* no editing if not interactive */
163 sethistsize(const char *hs)
169 if (hs == NULL || !is_number(hs))
173 history(hist, &he, H_SETSIZE, histsize);
174 history(hist, &he, H_SETUNIQUE, 1);
179 setterm(const char *term)
181 if (rootshell && el != NULL && term != NULL)
182 el_set(el, EL_TERMINAL, term);
186 histcmd(int argc, char **argv __unused)
189 const char *editor = NULL;
191 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
193 const char *firststr, *laststr;
194 int first, last, direction;
195 char *pat = NULL, *repl = NULL;
196 static int active = 0;
197 struct jmploc jmploc;
198 struct jmploc *savehandler;
199 char editfilestr[PATH_MAX];
200 char *volatile editfile;
205 error("history not active");
208 error("missing history argument");
210 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
229 savehandler = handler;
233 if (lflg == 0 || editor || sflg) {
234 lflg = 0; /* ignore */
237 * Catch interrupts to reset active counter and
238 * cleanup temp files.
240 if (setjmp(jmploc.loc)) {
244 handler = savehandler;
245 longjmp(handler->loc, 1);
248 if (++active > MAXHISTLOOPS) {
251 error("called recursively too many times");
257 if (editor == NULL &&
258 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
259 (editor = bltinlookup("EDITOR", 1)) == NULL)
261 if (editor[0] == '-' && editor[1] == '\0') {
262 sflg = 1; /* no edit */
269 * If executing, parse [old=new] now
271 if (lflg == 0 && *argptr != NULL &&
272 ((repl = strchr(*argptr, '=')) != NULL)) {
278 * determine [first] and [last]
280 if (*argptr == NULL) {
281 firststr = lflg ? "-16" : "-1";
283 } else if (argptr[1] == NULL) {
284 firststr = argptr[0];
285 laststr = lflg ? "-1" : argptr[0];
286 } else if (argptr[2] == NULL) {
287 firststr = argptr[0];
290 error("too many arguments");
292 * Turn into event numbers.
294 first = str_to_event(firststr, 0);
295 last = str_to_event(laststr, 1);
303 * XXX - this should not depend on the event numbers
304 * always increasing. Add sequence numbers or offset
305 * to the history element in next (diskbased) release.
307 direction = first < last ? H_PREV : H_NEXT;
310 * If editing, grab a temp file.
315 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
316 if ((fd = mkstemp(editfilestr)) < 0)
317 error("can't create temporary file %s", editfile);
318 editfile = editfilestr;
319 if ((efp = fdopen(fd, "w")) == NULL) {
321 error("Out of space");
326 * Loop through selected history events. If listing or executing,
327 * do it now. Otherwise, put into temp file and call the editor
330 * The history interface needs rethinking, as the following
331 * convolutions will demonstrate.
333 history(hist, &he, H_FIRST);
334 retval = history(hist, &he, H_NEXT_EVENT, first);
335 for (;retval != -1; retval = history(hist, &he, direction)) {
338 out1fmt("%5d ", he.num);
341 const char *s = pat ?
342 fc_replace(he.str, pat, repl) : he.str;
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
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, 0); /* XXX - should use no JC command */
383 readcmdfile(editfile); /* XXX - should read back - quick tst */
387 if (lflg == 0 && active > 0)
391 handler = savehandler;
396 fc_replace(const char *s, char *p, char *r)
399 int plen = strlen(p);
403 if (*s == *p && strncmp(s, p, plen) == 0) {
406 *p = '\0'; /* so no more matches */
411 dest = grabstackstr(dest);
417 not_fcnumber(const 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, __DECONST(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");