3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
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35 static char sccsid
[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: head/bin/sh/histedit.c 360139 2020-04-21 00:37:55Z bdrewery $");
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");