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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).
59 #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;
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_out = fdopen(2, "w");
111 if (el_in == NULL || el_out == NULL)
113 term = lookupvar("TERM");
115 setenv("TERM", term, 1);
118 el = el_init(arg0, el_in, el_out, el_out);
121 el_set(el, EL_HIST, history, hist);
122 el_set(el, EL_PROMPT, getprompt);
123 el_set(el, EL_ADDFN, "sh-complete",
124 "Filename completion",
128 out2fmt_flush("sh: can't initialize editing\n");
131 } else if (!editing && el) {
139 el_set(el, EL_EDITOR, "vi");
141 el_set(el, EL_EDITOR, "emacs");
142 el_set(el, EL_BIND, "^I", "sh-complete", NULL);
147 if (el) { /* no editing if not interactive */
161 sethistsize(const char *hs)
167 if (hs == NULL || !is_number(hs))
171 history(hist, &he, H_SETSIZE, histsize);
172 history(hist, &he, H_SETUNIQUE, 1);
177 setterm(const char *term)
179 if (rootshell && el != NULL && term != NULL)
180 el_set(el, EL_TERMINAL, term);
184 histcmd(int argc, char **argv __unused)
187 const char *editor = NULL;
189 int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
191 const char *firststr, *laststr;
192 int first, last, direction;
193 char *pat = NULL, *repl = NULL;
194 static int active = 0;
195 struct jmploc jmploc;
196 struct jmploc *savehandler;
197 char editfilestr[PATH_MAX];
198 char *volatile editfile;
203 error("history not active");
206 error("missing history argument");
208 while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
227 savehandler = handler;
231 if (lflg == 0 || editor || sflg) {
232 lflg = 0; /* ignore */
235 * Catch interrupts to reset active counter and
236 * cleanup temp files.
238 if (setjmp(jmploc.loc)) {
242 handler = savehandler;
243 longjmp(handler->loc, 1);
246 if (++active > MAXHISTLOOPS) {
249 error("called recursively too many times");
255 if (editor == NULL &&
256 (editor = bltinlookup("FCEDIT", 1)) == NULL &&
257 (editor = bltinlookup("EDITOR", 1)) == NULL)
259 if (editor[0] == '-' && editor[1] == '\0') {
260 sflg = 1; /* no edit */
267 * If executing, parse [old=new] now
269 if (lflg == 0 && *argptr != NULL &&
270 ((repl = strchr(*argptr, '=')) != NULL)) {
276 * determine [first] and [last]
278 if (*argptr == NULL) {
279 firststr = lflg ? "-16" : "-1";
281 } else if (argptr[1] == NULL) {
282 firststr = argptr[0];
283 laststr = lflg ? "-1" : argptr[0];
284 } else if (argptr[2] == NULL) {
285 firststr = argptr[0];
288 error("too many arguments");
290 * Turn into event numbers.
292 first = str_to_event(firststr, 0);
293 last = str_to_event(laststr, 1);
301 * XXX - this should not depend on the event numbers
302 * always increasing. Add sequence numbers or offset
303 * to the history element in next (diskbased) release.
305 direction = first < last ? H_PREV : H_NEXT;
308 * If editing, grab a temp file.
313 sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
314 if ((fd = mkstemp(editfilestr)) < 0)
315 error("can't create temporary file %s", editfile);
316 editfile = editfilestr;
317 if ((efp = fdopen(fd, "w")) == NULL) {
319 error("Out of space");
324 * Loop through selected history events. If listing or executing,
325 * do it now. Otherwise, put into temp file and call the editor
328 * The history interface needs rethinking, as the following
329 * convolutions will demonstrate.
331 history(hist, &he, H_FIRST);
332 retval = history(hist, &he, H_NEXT_EVENT, first);
333 for (;retval != -1; retval = history(hist, &he, direction)) {
336 out1fmt("%5d ", he.num);
339 const char *s = pat ?
340 fc_replace(he.str, pat, repl) : he.str;
348 if (displayhist && hist) {
350 * XXX what about recursive and
354 history(hist, &he, H_ENTER, s);
356 * XXX H_ENTER moves the internal
357 * cursor, set it back to the current
361 H_NEXT_EVENT, oldhistnum);
367 * 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 */
381 readcmdfile(editfile); /* XXX - should read back - quick tst */
385 if (lflg == 0 && active > 0)
389 handler = savehandler;
394 fc_replace(const char *s, char *p, char *r)
397 int plen = strlen(p);
401 if (*s == *p && strncmp(s, p, plen) == 0) {
404 *p = '\0'; /* so no more matches */
409 dest = grabstackstr(dest);
415 not_fcnumber(const char *s)
421 return (!is_number(s));
425 str_to_event(const char *str, int last)
432 retval = history(hist, &he, H_FIRST);
443 while (retval != -1 && i--) {
444 retval = history(hist, &he, H_NEXT);
447 retval = history(hist, &he, H_LAST);
449 retval = history(hist, &he, H_NEXT_EVENT, i);
452 * the notion of first and last is
453 * backwards to that of the history package
455 retval = history(hist, &he, last ? H_FIRST : H_LAST);
459 error("history number %s not found (internal error)",
465 retval = history(hist, &he, H_PREV_STR, str);
467 error("history pattern not found: %s", str);
473 bindcmd(int argc, char **argv)
480 error("line editing is disabled");
486 error("Out of space");
488 el_get(el, EL_GETFP, 1, &old);
489 el_set(el, EL_SETFP, 1, out);
491 ret = el_parse(el, argc, __DECONST(const char **, argv));
493 el_set(el, EL_SETFP, 1, old);
506 histcmd(int argc __unused, char **argv __unused)
509 error("not compiled with history support");
515 bindcmd(int argc __unused, char **argv __unused)
518 error("not compiled with line editing support");