[apple/shell_cmds.git] / sh / histedit.c

/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)histedit.c	8.2 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/bin/sh/histedit.c 319635 2017-06-06 21:08:05Z jilles $");

#include <sys/param.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/*
 * Editline and history functions (and glue).
 */
#include "shell.h"
#include "parser.h"
#include "var.h"
#include "options.h"
#include "main.h"
#include "output.h"
#include "mystring.h"
#ifndef NO_HISTORY
#include "myhistedit.h"
#include "error.h"
#include "eval.h"
#include "memalloc.h"
#include "builtins.h"

#define MAXHISTLOOPS	4	/* max recursions through fc */
#define DEFEDITOR	"ed"	/* default editor *should* be $EDITOR */

History *hist;	/* history cookie */
EditLine *el;	/* editline cookie */
int displayhist;
static FILE *el_in, *el_out, *el_err;

static char *fc_replace(const char *, char *, char *);
static int not_fcnumber(const char *);
static int str_to_event(const char *, int);

/*
 * Set history and editing status.  Called whenever the status may
 * have changed (figures out what to do).
 */
void
histedit(void)
{

#define editing (Eflag || Vflag)

	if (iflag) {
		if (!hist) {
			/*
			 * turn history on
			 */
			INTOFF;
			hist = history_init();
			INTON;

			if (hist != NULL)
				sethistsize(histsizeval());
			else
				out2fmt_flush("sh: can't initialize history\n");
		}
		if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
			/*
			 * turn editing on
			 */
			char *term;

			INTOFF;
			if (el_in == NULL)
				el_in = fdopen(0, "r");
			if (el_err == NULL)
				el_err = fdopen(1, "w");
			if (el_out == NULL)
				el_out = fdopen(2, "w");
			if (el_in == NULL || el_err == NULL || el_out == NULL)
				goto bad;
			term = lookupvar("TERM");
			if (term)
				setenv("TERM", term, 1);
			else
				unsetenv("TERM");
			el = el_init(arg0, el_in, el_out, el_err);
			if (el != NULL) {
				if (hist)
					el_set(el, EL_HIST, history, hist);
				el_set(el, EL_PROMPT, getprompt);
				el_set(el, EL_ADDFN, "sh-complete",
				    "Filename completion",
				    _el_fn_sh_complete);
			} else {
bad:
				out2fmt_flush("sh: can't initialize editing\n");
			}
			INTON;
		} else if (!editing && el) {
			INTOFF;
			el_end(el);
			el = NULL;
			INTON;
		}
		if (el) {
			if (Vflag)
				el_set(el, EL_EDITOR, "vi");
			else if (Eflag)
				el_set(el, EL_EDITOR, "emacs");
			el_set(el, EL_BIND, "^I", "sh-complete", NULL);
			el_source(el, NULL);
		}
	} else {
		INTOFF;
		if (el) {	/* no editing if not interactive */
			el_end(el);
			el = NULL;
		}
		if (hist) {
			history_end(hist);
			hist = NULL;
		}
		INTON;
	}
}


void
sethistsize(const char *hs)
{
	int histsize;
	HistEvent he;

	if (hist != NULL) {
		if (hs == NULL || !is_number(hs))
			histsize = 100;
		else
			histsize = atoi(hs);
		history(hist, &he, H_SETSIZE, histsize);
		history(hist, &he, H_SETUNIQUE, 1);
	}
}

void
setterm(const char *term)
{
	if (rootshell && el != NULL && term != NULL)
		el_set(el, EL_TERMINAL, term);
}

int
histcmd(int argc, char **argv __unused)
{
	int ch;
	const char *editor = NULL;
	HistEvent he;
	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
	int i, retval;
	const char *firststr, *laststr;
	int first, last, direction;
	char *pat = NULL, *repl = NULL;
	static int active = 0;
	struct jmploc jmploc;
	struct jmploc *savehandler;
	char editfilestr[PATH_MAX];
	char *volatile editfile;
	FILE *efp = NULL;
	int oldhistnum;

	if (hist == NULL)
		error("history not active");

	if (argc == 1)
		error("missing history argument");

	while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
		switch ((char)ch) {
		case 'e':
			editor = shoptarg;
			break;
		case 'l':
			lflg = 1;
			break;
		case 'n':
			nflg = 1;
			break;
		case 'r':
			rflg = 1;
			break;
		case 's':
			sflg = 1;
			break;
		}

	savehandler = handler;
	/*
	 * If executing...
	 */
	if (lflg == 0 || editor || sflg) {
		lflg = 0;	/* ignore */
		editfile = NULL;
		/*
		 * Catch interrupts to reset active counter and
		 * cleanup temp files.
		 */
		if (setjmp(jmploc.loc)) {
			active = 0;
			if (editfile)
				unlink(editfile);
			handler = savehandler;
			longjmp(handler->loc, 1);
		}
		handler = &jmploc;
		if (++active > MAXHISTLOOPS) {
			active = 0;
			displayhist = 0;
			error("called recursively too many times");
		}
		/*
		 * Set editor.
		 */
		if (sflg == 0) {
			if (editor == NULL &&
			    (editor = bltinlookup("FCEDIT", 1)) == NULL &&
			    (editor = bltinlookup("EDITOR", 1)) == NULL)
				editor = DEFEDITOR;
			if (editor[0] == '-' && editor[1] == '\0') {
				sflg = 1;	/* no edit */
				editor = NULL;
			}
		}
	}

	/*
	 * If executing, parse [old=new] now
	 */
	if (lflg == 0 && *argptr != NULL &&
	     ((repl = strchr(*argptr, '=')) != NULL)) {
		pat = *argptr;
		*repl++ = '\0';
		argptr++;
	}
	/*
	 * determine [first] and [last]
	 */
	if (*argptr == NULL) {
		firststr = lflg ? "-16" : "-1";
		laststr = "-1";
	} else if (argptr[1] == NULL) {
		firststr = argptr[0];
		laststr = lflg ? "-1" : argptr[0];
	} else if (argptr[2] == NULL) {
		firststr = argptr[0];
		laststr = argptr[1];
	} else
		error("too many arguments");
	/*
	 * Turn into event numbers.
	 */
	first = str_to_event(firststr, 0);
	last = str_to_event(laststr, 1);

	if (rflg) {
		i = last;
		last = first;
		first = i;
	}
	/*
	 * XXX - this should not depend on the event numbers
	 * always increasing.  Add sequence numbers or offset
	 * to the history element in next (diskbased) release.
	 */
	direction = first < last ? H_PREV : H_NEXT;

	/*
	 * If editing, grab a temp file.
	 */
	if (editor) {
		int fd;
		INTOFF;		/* easier */
		sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
		if ((fd = mkstemp(editfilestr)) < 0)
			error("can't create temporary file %s", editfile);
		editfile = editfilestr;
		if ((efp = fdopen(fd, "w")) == NULL) {
			close(fd);
			error("Out of space");
		}
	}

	/*
	 * Loop through selected history events.  If listing or executing,
	 * do it now.  Otherwise, put into temp file and call the editor
	 * after.
	 *
	 * The history interface needs rethinking, as the following
	 * convolutions will demonstrate.
	 */
	history(hist, &he, H_FIRST);
	retval = history(hist, &he, H_NEXT_EVENT, first);
	for (;retval != -1; retval = history(hist, &he, direction)) {
		if (lflg) {
			if (!nflg)
				out1fmt("%5d ", he.num);
			out1str(he.str);
		} else {
			const char *s = pat ?
			   fc_replace(he.str, pat, repl) : he.str;

			if (sflg) {
				if (displayhist) {
					out2str(s);
					flushout(out2);
				}
				evalstring(s, 0);
				if (displayhist && hist) {
					/*
					 *  XXX what about recursive and
					 *  relative histnums.
					 */
					oldhistnum = he.num;
					history(hist, &he, H_ENTER, s);
					/*
					 * XXX H_ENTER moves the internal
					 * cursor, set it back to the current
					 * entry.
					 */
					history(hist, &he,
					    H_NEXT_EVENT, oldhistnum);
				}
			} else
				fputs(s, efp);
		}
		/*
		 * At end?  (if we were to lose last, we'd sure be
		 * messed up).
		 */
		if (he.num == last)
			break;
	}
	if (editor) {
		char *editcmd;

		fclose(efp);
		INTON;
		editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
		sprintf(editcmd, "%s %s", editor, editfile);
		evalstring(editcmd, 0);	/* XXX - should use no JC command */
		readcmdfile(editfile);	/* XXX - should read back - quick tst */
		unlink(editfile);
	}

	if (lflg == 0 && active > 0)
		--active;
	if (displayhist)
		displayhist = 0;
	handler = savehandler;
	return 0;
}

static char *
fc_replace(const char *s, char *p, char *r)
{
	char *dest;
	int plen = strlen(p);

	STARTSTACKSTR(dest);
	while (*s) {
		if (*s == *p && strncmp(s, p, plen) == 0) {
			STPUTS(r, dest);
			s += plen;
			*p = '\0';	/* so no more matches */
		} else
			STPUTC(*s++, dest);
	}
	STPUTC('\0', dest);
	dest = grabstackstr(dest);

	return (dest);
}

static int
not_fcnumber(const char *s)
{
	if (s == NULL)
		return (0);
	if (*s == '-')
		s++;
	return (!is_number(s));
}

static int
str_to_event(const char *str, int last)
{
	HistEvent he;
	const char *s = str;
	int relative = 0;
	int i, retval;

	retval = history(hist, &he, H_FIRST);
	switch (*s) {
	case '-':
		relative = 1;
		/*FALLTHROUGH*/
	case '+':
		s++;
	}
	if (is_number(s)) {
		i = atoi(s);
		if (relative) {
			while (retval != -1 && i--) {
				retval = history(hist, &he, H_NEXT);
			}
			if (retval == -1)
				retval = history(hist, &he, H_LAST);
		} else {
			retval = history(hist, &he, H_NEXT_EVENT, i);
			if (retval == -1) {
				/*
				 * the notion of first and last is
				 * backwards to that of the history package
				 */
				retval = history(hist, &he, last ? H_FIRST : H_LAST);
			}
		}
		if (retval == -1)
			error("history number %s not found (internal error)",
			       str);
	} else {
		/*
		 * pattern
		 */
		retval = history(hist, &he, H_PREV_STR, str);
		if (retval == -1)
			error("history pattern not found: %s", str);
	}
	return (he.num);
}

int
bindcmd(int argc, char **argv)
{

	if (el == NULL)
		error("line editing is disabled");
	return (el_parse(el, argc, __DECONST(const char **, argv)));
}

#else
#include "error.h"

int
histcmd(int argc, char **argv)
{

	error("not compiled with history support");
	/*NOTREACHED*/
	return (0);
}

int
bindcmd(int argc, char **argv)
{

	error("not compiled with line editing support");
	return (0);
}
#endif
Commit	Line	Data
71aad674 A	1	/*-
	2	* Copyright (c) 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Kenneth Almquist.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
254f12f7	16	* 3. Neither the name of the University nor the names of its contributors
71aad674 A	17	* may be used to endorse or promote products derived from this software
	18	* without specific prior written permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	* SUCH DAMAGE.
	31	*/
	32
	33	#ifndef lint
	34	#if 0
	35	static char sccsid[] = "@(#)histedit.c 8.2 (Berkeley) 5/4/95";
	36	#endif
	37	#endif /* not lint */
	38	#include <sys/cdefs.h>
254f12f7	39	__FBSDID("$FreeBSD: head/bin/sh/histedit.c 319635 2017-06-06 21:08:05Z jilles $");
71aad674 A	40
	41	#include <sys/param.h>
	42	#include <limits.h>
	43	#include <paths.h>
	44	#include <stdio.h>
	45	#include <stdlib.h>
	46	#include <unistd.h>
	47	/*
	48	* Editline and history functions (and glue).
	49	*/
	50	#include "shell.h"
	51	#include "parser.h"
	52	#include "var.h"
	53	#include "options.h"
	54	#include "main.h"
	55	#include "output.h"
	56	#include "mystring.h"
	57	#ifndef NO_HISTORY
	58	#include "myhistedit.h"
	59	#include "error.h"
	60	#include "eval.h"
	61	#include "memalloc.h"
	62	#include "builtins.h"
	63
	64	#define MAXHISTLOOPS 4 /* max recursions through fc */
	65	#define DEFEDITOR "ed" /* default editor should be $EDITOR */
	66
	67	History hist; / history cookie */
	68	EditLine el; / editline cookie */
	69	int displayhist;
	70	static FILE el_in, el_out, *el_err;
	71
	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);
	75
	76	/*
	77	* Set history and editing status. Called whenever the status may
	78	* have changed (figures out what to do).
	79	*/
	80	void
	81	histedit(void)
	82	{
	83
	84	#define editing (Eflag \|\| Vflag)
	85
	86	if (iflag) {
	87	if (!hist) {
	88	/*
	89	* turn history on
	90	*/
	91	INTOFF;
	92	hist = history_init();
	93	INTON;
	94
	95	if (hist != NULL)
	96	sethistsize(histsizeval());
	97	else
	98	out2fmt_flush("sh: can't initialize history\n");
	99	}
	100	if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
	101	/*
	102	* turn editing on
	103	*/
104	char *term;
105
106	INTOFF;
107	if (el_in == NULL)
108	el_in = fdopen(0, "r");
109	if (el_err == NULL)
110	el_err = fdopen(1, "w");
111	if (el_out == NULL)
112	el_out = fdopen(2, "w");
113	if (el_in == NULL \|\| el_err == NULL \|\| el_out == NULL)
114	goto bad;
115	term = lookupvar("TERM");
116	if (term)
117	setenv("TERM", term, 1);
118	else
119	unsetenv("TERM");
120	el = el_init(arg0, el_in, el_out, el_err);
121	if (el != NULL) {
122	if (hist)
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",
127	_el_fn_sh_complete);
128	} else {
129	bad:
130	out2fmt_flush("sh: can't initialize editing\n");
131	}
132	INTON;
133	} else if (!editing && el) {
134	INTOFF;
135	el_end(el);
136	el = NULL;
137	INTON;
138	}
139	if (el) {
140	if (Vflag)
141	el_set(el, EL_EDITOR, "vi");
142	else if (Eflag)
143	el_set(el, EL_EDITOR, "emacs");
144	el_set(el, EL_BIND, "^I", "sh-complete", NULL);
145	el_source(el, NULL);
146	}
147	} else {
148	INTOFF;
149	if (el) { /* no editing if not interactive */
150	el_end(el);
151	el = NULL;
152	}
153	if (hist) {
154	history_end(hist);
155	hist = NULL;
156	}
157	INTON;
158	}
159	}
160
161
162	void
163	sethistsize(const char *hs)
164	{
165	int histsize;
166	HistEvent he;
167
168	if (hist != NULL) {
169	if (hs == NULL \|\| !is_number(hs))
170	histsize = 100;
171	else
172	histsize = atoi(hs);
173	history(hist, &he, H_SETSIZE, histsize);
174	history(hist, &he, H_SETUNIQUE, 1);
175	}
176	}
177
178	void
179	setterm(const char *term)
180	{
181	if (rootshell && el != NULL && term != NULL)
182	el_set(el, EL_TERMINAL, term);
183	}
184
185	int
186	histcmd(int argc, char **argv __unused)
187	{
188	int ch;
189	const char *editor = NULL;
190	HistEvent he;
191	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
192	int i, retval;
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;
201	FILE *efp = NULL;
202	int oldhistnum;
203
204	if (hist == NULL)
205	error("history not active");
206
207	if (argc == 1)
208	error("missing history argument");
209
210	while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
211	switch ((char)ch) {
212	case 'e':
213	editor = shoptarg;
214	break;
215	case 'l':
216	lflg = 1;
217	break;
218	case 'n':
219	nflg = 1;
220	break;
221	case 'r':
222	rflg = 1;
223	break;
224	case 's':
225	sflg = 1;
226	break;
227	}
228
229	savehandler = handler;
230	/*
231	* If executing...
232	*/
233	if (lflg == 0 \|\| editor \|\| sflg) {
234	lflg = 0; /* ignore */
235	editfile = NULL;
236	/*
237	* Catch interrupts to reset active counter and
238	* cleanup temp files.
239	*/
240	if (setjmp(jmploc.loc)) {
241	active = 0;
242	if (editfile)
243	unlink(editfile);
244	handler = savehandler;
245	longjmp(handler->loc, 1);
246	}
247	handler = &jmploc;
248	if (++active > MAXHISTLOOPS) {
249	active = 0;
250	displayhist = 0;
251	error("called recursively too many times");
252	}
253	/*
254	* Set editor.
255	*/
256	if (sflg == 0) {
257	if (editor == NULL &&
258	(editor = bltinlookup("FCEDIT", 1)) == NULL &&
259	(editor = bltinlookup("EDITOR", 1)) == NULL)
260	editor = DEFEDITOR;
261	if (editor[0] == '-' && editor[1] == '\0') {
262	sflg = 1; /* no edit */
263	editor = NULL;
264	}
265	}
266	}
267
268	/*
269	* If executing, parse [old=new] now
270	*/
271	if (lflg == 0 && *argptr != NULL &&
272	((repl = strchr(*argptr, '=')) != NULL)) {
273	pat = *argptr;
274	*repl++ = '\0';
275	argptr++;
276	}
277	/*
278	* determine [first] and [last]
279	*/
280	if (*argptr == NULL) {
281	firststr = lflg ? "-16" : "-1";
282	laststr = "-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];
288	laststr = argptr[1];
289	} else
290	error("too many arguments");
291	/*
292	* Turn into event numbers.
293	*/
294	first = str_to_event(firststr, 0);
295	last = str_to_event(laststr, 1);
296
297	if (rflg) {
298	i = last;
299	last = first;
300	first = i;
301	}
302	/*
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.
306	*/
307	direction = first < last ? H_PREV : H_NEXT;
308
309	/*
310	* If editing, grab a temp file.
311	*/
312	if (editor) {
313	int fd;
314	INTOFF; /* easier */
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) {
320	close(fd);
321	error("Out of space");
322	}
323	}
324
325	/*
326	* Loop through selected history events. If listing or executing,
327	* do it now. Otherwise, put into temp file and call the editor
328	* after.
329	*
330	* The history interface needs rethinking, as the following
331	* convolutions will demonstrate.
332	*/
333	history(hist, &he, H_FIRST);
334	retval = history(hist, &he, H_NEXT_EVENT, first);
335	for (;retval != -1; retval = history(hist, &he, direction)) {
336	if (lflg) {
337	if (!nflg)
338	out1fmt("%5d ", he.num);
339	out1str(he.str);
340	} else {
341	const char *s = pat ?
342	fc_replace(he.str, pat, repl) : he.str;
343
344	if (sflg) {
345	if (displayhist) {
346	out2str(s);
347	flushout(out2);
348	}
349	evalstring(s, 0);
350	if (displayhist && hist) {
351	/*
352	* XXX what about recursive and
353	* relative histnums.
354	*/
355	oldhistnum = he.num;
356	history(hist, &he, H_ENTER, s);
357	/*
358	* XXX H_ENTER moves the internal
359	* cursor, set it back to the current
360	* entry.
361	*/
deb63bfb	362	history(hist, &he,
71aad674 A	363	H_NEXT_EVENT, oldhistnum);
	364	}
	365	} else
	366	fputs(s, efp);
	367	}
	368	/*
	369	* At end? (if we were to lose last, we'd sure be
	370	* messed up).
	371	*/
	372	if (he.num == last)
	373	break;
	374	}
	375	if (editor) {
	376	char *editcmd;
	377
	378	fclose(efp);
254f12f7	379	INTON;
71aad674 A	380	editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
	381	sprintf(editcmd, "%s %s", editor, editfile);
	382	evalstring(editcmd, 0); /* XXX - should use no JC command */
71aad674 A	383	readcmdfile(editfile); /* XXX - should read back - quick tst */
	384	unlink(editfile);
	385	}
	386
	387	if (lflg == 0 && active > 0)
	388	--active;
	389	if (displayhist)
	390	displayhist = 0;
	391	handler = savehandler;
	392	return 0;
	393	}
	394
	395	static char *
	396	fc_replace(const char s, char p, char *r)
	397	{
	398	char *dest;
	399	int plen = strlen(p);
	400
	401	STARTSTACKSTR(dest);
	402	while (*s) {
	403	if (s == p && strncmp(s, p, plen) == 0) {
	404	STPUTS(r, dest);
	405	s += plen;
	406	p = '\0'; / so no more matches */
	407	} else
	408	STPUTC(*s++, dest);
	409	}
	410	STPUTC('\0', dest);
	411	dest = grabstackstr(dest);
	412
	413	return (dest);
	414	}
	415
	416	static int
	417	not_fcnumber(const char *s)
	418	{
	419	if (s == NULL)
	420	return (0);
	421	if (*s == '-')
	422	s++;
	423	return (!is_number(s));
	424	}
	425
	426	static int
	427	str_to_event(const char *str, int last)
	428	{
	429	HistEvent he;
	430	const char *s = str;
	431	int relative = 0;
	432	int i, retval;
	433
	434	retval = history(hist, &he, H_FIRST);
	435	switch (*s) {
	436	case '-':
	437	relative = 1;
	438	/FALLTHROUGH/
	439	case '+':
	440	s++;
	441	}
	442	if (is_number(s)) {
	443	i = atoi(s);
	444	if (relative) {
	445	while (retval != -1 && i--) {
	446	retval = history(hist, &he, H_NEXT);
447	}
448	if (retval == -1)
449	retval = history(hist, &he, H_LAST);
450	} else {
451	retval = history(hist, &he, H_NEXT_EVENT, i);
452	if (retval == -1) {
453	/*
454	* the notion of first and last is
455	* backwards to that of the history package
456	*/
457	retval = history(hist, &he, last ? H_FIRST : H_LAST);
458	}
459	}
460	if (retval == -1)
461	error("history number %s not found (internal error)",
462	str);
463	} else {
464	/*
465	* pattern
466	*/
467	retval = history(hist, &he, H_PREV_STR, str);
468	if (retval == -1)
469	error("history pattern not found: %s", str);
470	}
471	return (he.num);
472	}
473
474	int
475	bindcmd(int argc, char **argv)
476	{
477
478	if (el == NULL)
479	error("line editing is disabled");
480	return (el_parse(el, argc, __DECONST(const char **, argv)));
481	}
482
483	#else
484	#include "error.h"
485
486	int
487	histcmd(int argc, char **argv)
488	{
489
490	error("not compiled with history support");
491	/NOTREACHED/
492	return (0);
493	}
494
495	int
496	bindcmd(int argc, char **argv)
497	{
498
499	error("not compiled with line editing support");
500	return (0);
501	}
502	#endif