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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 || *hs == '\0' ||
170 (histsize = atoi(hs)) < 0)
172 history(hist, &he, H_SETSIZE, histsize);
173 history(hist, &he, H_SETUNIQUE, 1);
178 setterm(const char *term)
180 if (rootshell && el != NULL && term != NULL)
181 el_set(el, EL_TERMINAL, term);
185 histcmd(int argc, char **argv __unused)
188 const char *editor = NULL;
190 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
192 const char *firststr, *laststr;
193 int first, last, direction;
194 char *pat = NULL, *repl = NULL;
195 static int active = 0;
196 struct jmploc jmploc;
197 struct jmploc *savehandler;
198 char editfilestr[PATH_MAX];
199 char *volatile editfile;
204 error("history not active");
207 error("missing history argument");
209 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
228 savehandler = handler;
232 if (lflg == 0 || editor || sflg) {
233 lflg = 0; /* ignore */
236 * Catch interrupts to reset active counter and
237 * cleanup temp files.
239 if (setjmp(jmploc.loc)) {
243 handler = savehandler;
244 longjmp(handler->loc, 1);
247 if (++active > MAXHISTLOOPS) {
250 error("called recursively too many times");
256 if (editor == NULL &&
257 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
258 (editor = bltinlookup("EDITOR", 1)) == NULL)
260 if (editor[0] == '-' && editor[1] == '\0') {
261 sflg = 1; /* no edit */
268 * If executing, parse [old=new] now
270 if (lflg == 0 && *argptr != NULL &&
271 ((repl = strchr(*argptr, '=')) != NULL)) {
277 * determine [first] and [last]
279 if (*argptr == NULL) {
280 firststr = lflg ? "-16" : "-1";
282 } else if (argptr[1] == NULL) {
283 firststr = argptr[0];
284 laststr = lflg ? "-1" : argptr[0];
285 } else if (argptr[2] == NULL) {
286 firststr = argptr[0];
289 error("too many arguments");
291 * Turn into event numbers.
293 first = str_to_event(firststr, 0);
294 last = str_to_event(laststr, 1);
302 * XXX - this should not depend on the event numbers
303 * always increasing. Add sequence numbers or offset
304 * to the history element in next (diskbased) release.
306 direction = first < last ? H_PREV : H_NEXT;
309 * If editing, grab a temp file.
314 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
315 if ((fd = mkstemp(editfilestr)) < 0)
316 error("can't create temporary file %s", editfile);
317 editfile = editfilestr;
318 if ((efp = fdopen(fd, "w")) == NULL) {
320 error("Out of space");
325 * Loop through selected history events. If listing or executing,
326 * do it now. Otherwise, put into temp file and call the editor
329 * The history interface needs rethinking, as the following
330 * convolutions will demonstrate.
332 history(hist, &he, H_FIRST);
333 retval = history(hist, &he, H_NEXT_EVENT, first);
334 for (;retval != -1; retval = history(hist, &he, direction)) {
337 out1fmt("%5d ", he.num);
341 fc_replace(he.str, pat, repl) : (char *)he.str;
349 if (displayhist && hist) {
351 * XXX what about recursive and
355 history(hist, &he, H_ENTER, s);
357 * XXX H_ENTER moves the internal
358 * cursor, set it back to the current
361 retval = history(hist, &he,
362 H_NEXT_EVENT, oldhistnum);
368 * At end? (if we were to lose last, we'd sure be
378 editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
379 sprintf(editcmd, "%s %s", editor, editfile);
380 evalstring(editcmd, 0); /* XXX - should use no JC command */
382 readcmdfile(editfile); /* XXX - should read back - quick tst */
386 if (lflg == 0 && active > 0)
390 handler = savehandler;
395 fc_replace(const char *s, char *p, char *r)
398 int plen = strlen(p);
402 if (*s == *p && strncmp(s, p, plen) == 0) {
405 *p = '\0'; /* so no more matches */
410 dest = grabstackstr(dest);
416 not_fcnumber(const char *s)
422 return (!is_number(s));
426 str_to_event(const char *str, int last)
433 retval = history(hist, &he, H_FIRST);
444 while (retval != -1 && i--) {
445 retval = history(hist, &he, H_NEXT);
448 retval = history(hist, &he, H_LAST);
450 retval = history(hist, &he, H_NEXT_EVENT, i);
453 * the notion of first and last is
454 * backwards to that of the history package
456 retval = history(hist, &he, last ? H_FIRST : H_LAST);
460 error("history number %s not found (internal error)",
466 retval = history(hist, &he, H_PREV_STR, str);
468 error("history pattern not found: %s", str);
474 bindcmd(int argc, char **argv)
478 error("line editing is disabled");
479 return (el_parse(el, argc, (const char **)argv));
486 histcmd(int argc, char **argv)
489 error("not compiled with history support");
495 bindcmd(int argc, char **argv)
498 error("not compiled with line editing support");