[unix-history] / usr / src / bin / 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.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)histedit.c	8.1 (Berkeley) %G%";
#endif /* not lint */

/*
 * Editline and history functions (and glue).
 */
#include <sys/param.h>
#include <paths.h>
#include <stdio.h>
#include "shell.h"
#include "parser.h"
#include "var.h"
#include "options.h"
#include "mystring.h"
#include "error.h"
#include "histedit.h"
#include "memalloc.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;

STATIC char *fc_replace __P((const char *, char *, char *));

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

#define editing (Eflag || Vflag)

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

			if (hist != NULL)
				sethistsize();
			else
				out2str("sh: can't initialize history\n");
		}
		if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
			/*
			 * turn editing on
			 */
			INTOFF;
			if (el_in == NULL)
				el_in = fdopen(0, "r");
			if (el_out == NULL)
				el_out = fdopen(2, "w");
			if (el_in == NULL || el_out == NULL)
				goto bad;
			el = el_init(arg0, el_in, el_out);
			if (el != NULL) {
				if (hist)
					el_set(el, EL_HIST, history, hist);
				el_set(el, EL_PROMPT, getprompt);
			} else {
bad:
				out2str("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");
		}
	} else {
		INTOFF;
		if (el) {	/* no editing if not interactive */
			el_end(el);
			el = NULL;
		}
		if (hist) {
			history_end(hist);
			hist = NULL;
		}
		INTON;
	}
}

sethistsize() {
	char *cp;
	int histsize;

	if (hist != NULL) {
		cp = lookupvar("HISTSIZE");
		if (cp == NULL || *cp == '\0' || 
		   (histsize = atoi(cp)) < 0)
			histsize = 100;
		history(hist, H_EVENT, histsize);
	}
}

/*
 *  This command is provided since POSIX decided to standardize
 *  the Korn shell fc command.  Oh well...
 */
histcmd(argc, argv)
	char *argv[];
{
	extern char *optarg;
	extern int optind, optopt, optreset;
	int ch;
	char *editor = NULL;
	const HistEvent *he;
	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
	int i;
	char *firststr, *laststr;
	int first, last, direction;
	char *pat = NULL, *repl;	/* ksh "fc old=new" crap */
	static int active = 0;
	struct jmploc jmploc;
	struct jmploc *volatile savehandler;
	char editfile[MAXPATHLEN + 1];
	FILE *efp;

	if (hist == NULL)
		error("history not active");
	
	if (argc == 1)
		error("missing history argument");

	optreset = 1; optind = 1; /* initialize getopt */
	while (not_fcnumber(argv[optind]) &&
	      (ch = getopt(argc, argv, ":e:lnrs")) != EOF)
		switch ((char)ch) {
		case 'e':
			editor = optarg;
			break;
		case 'l':
			lflg = 1;
			break;
		case 'n':
			nflg = 1;
			break;
		case 'r':
			rflg = 1;
			break;
		case 's':
			sflg = 1;
			break;
		case ':':
			error("option -%c expects argument", optopt);
		case '?':
		default:
			error("unknown option: -%c", optopt);
		}
	argc -= optind, argv += optind;

	/*
	 * If executing...
	 */
	if (lflg == 0 || editor || sflg) {
		lflg = 0;	/* ignore */
		editfile[0] = '\0';
		/*
		 * 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);
		}
		savehandler = handler;
		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 && argc > 0 && 
	     ((repl = strchr(argv[0], '=')) != NULL)) {
		pat = argv[0];
		*repl++ = '\0';
		argc--, argv++;
	}
	/*
	 * determine [first] and [last]
	 */
	switch (argc) {
	case 0:
		firststr = lflg ? "-16" : "-1";
		laststr = "-1";
		break;
	case 1:
		firststr = argv[0];
		laststr = lflg ? "-1" : argv[0];
		break;
	case 2:
		firststr = argv[0];
		laststr = argv[1];
		break;
	default:
		error("too many args");
	}
	/*
	 * 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(editfile, "%s/_shXXXXXX", _PATH_TMP);
		if ((fd = mkstemp(editfile)) < 0)
			error("can't create temporary file %s", editfile);
		if ((efp = fdopen(fd, "w")) == NULL) {
			close(fd);
			error("can't allocate stdio buffer for temp\n");
		}
	}

	/*
	 * 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, H_FIRST);
	he = history(hist, H_NEXT_EVENT, first);
	for (;he != NULL; he = history(hist, direction)) {
		if (lflg) {
			if (!nflg)
				out1fmt("%5d ", he->num);
			out1str(he->str);
		} else {
			char *s = pat ? 
			   fc_replace(he->str, pat, repl) : (char *)he->str;

			if (sflg) {
				if (displayhist) {
					out2str(s);
				}
				evalstring(s);
				if (displayhist && hist) {
					/*
					 *  XXX what about recursive and 
					 *  relative histnums.
					 */
					history(hist, H_ENTER, s);
				}
			} else
				fputs(s, efp);
		}
		/*
		 * At end?  (if we were to loose last, we'd sure be
		 * messed up).
		 */
		if (he->num == last)
			break;
	}
	if (editor) {
		char *editcmd;

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

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

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

	return (dest);
}

not_fcnumber(s)
        char *s;
{
        if (*s == '-')
                s++;
	return (!is_number(s));
}

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

	he = history(hist, H_FIRST);
	switch (*s) {
	case '-':
		relative = 1;
		/*FALLTHROUGH*/
	case '+':
		s++;
	}
	if (is_number(s)) {
		i = atoi(s);
		if (relative) {
			while (he != NULL && i--) {
				he = history(hist, H_NEXT);
			}
			if (he == NULL)
				he = history(hist, H_LAST);
		} else {
			he = history(hist, H_NEXT_EVENT, i);
			if (he == NULL) {
				/*
				 * the notion of first and last is
				 * backwards to that of the history package
				 */
				he = history(hist, last ? H_FIRST : H_LAST);
			}
		}
		if (he == NULL)
			error("history number %s not found (internal error)",
			       str);
	} else {
		/*
		 * pattern 
		 */
		he = history(hist, H_PREV_STR, str);
		if (he == NULL)
			error("history pattern not found: %s", str);
	}
	return (he->num);
}
Commit	Line	Data
3b2a15e8	1	/*-
69edccc9 KB	2	* Copyright (c) 1993
69edccc9 KB	3	* The Regents of the University of California. All rights reserved.
3b2a15e8 KB	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Kenneth Almquist.
	7	*
	8	* %sccs.include.redist.c%
	9	*/
	10
	11	#ifndef lint
69edccc9	12	static char sccsid[] = "@(#)histedit.c 8.1 (Berkeley) %G%";
3b2a15e8 KB	13	#endif /* not lint */
3b2a15e8 KB	14
dc06984c MT	15	/*
	16	* Editline and history functions (and glue).
	17	*/
f7280c66 MT	18	#include <sys/param.h>
f7280c66 MT	19	#include <paths.h>
dc06984c	20	#include <stdio.h>
f7280c66	21	#include "shell.h"
dc06984c	22	#include "parser.h"
f7280c66	23	#include "var.h"
dc06984c	24	#include "options.h"
f7280c66	25	#include "mystring.h"
dc06984c	26	#include "error.h"
dc06984c	27	#include "histedit.h"
f7280c66 MT	28	#include "memalloc.h"
	29
	30	#define MAXHISTLOOPS 4 /* max recursions through fc */
	31	#define DEFEDITOR "ed" /* default editor should be $EDITOR */
dc06984c MT	32
	33	History hist; / history cookie */
	34	EditLine el; / editline cookie */
f7280c66	35	int displayhist;
dc06984c MT	36	static FILE el_in, el_out;
dc06984c MT	37
f7280c66	38	STATIC char fc_replace __P((const char , char , char ));
dc06984c MT	39
	40	/*
	41	* Set history and editing status. Called whenever the status may
	42	* have changed (figures out what to do).
	43	*/
	44	histedit() {
	45
f7280c66 MT	46	#define editing (Eflag \|\| Vflag)
	47
	48	if (iflag) {
dc06984c MT	49	if (!hist) {
	50	/*
	51	* turn history on
	52	*/
	53	INTOFF;
	54	hist = history_init();
	55	INTON;
	56
	57	if (hist != NULL)
	58	sethistsize();
	59	else
	60	out2str("sh: can't initialize history\n");
	61	}
f7280c66	62	if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
dc06984c MT	63	/*
	64	* turn editing on
	65	*/
	66	INTOFF;
	67	if (el_in == NULL)
	68	el_in = fdopen(0, "r");
	69	if (el_out == NULL)
	70	el_out = fdopen(2, "w");
	71	if (el_in == NULL \|\| el_out == NULL)
	72	goto bad;
	73	el = el_init(arg0, el_in, el_out);
	74	if (el != NULL) {
	75	if (hist)
f7280c66	76	el_set(el, EL_HIST, history, hist);
dc06984c MT	77	el_set(el, EL_PROMPT, getprompt);
	78	} else {
	79	bad:
	80	out2str("sh: can't initialize editing\n");
	81	}
	82	INTON;
f7280c66	83	} else if (!editing && el) {
dc06984c MT	84	INTOFF;
	85	el_end(el);
	86	el = NULL;
	87	INTON;
	88	}
f7280c66 MT	89	if (el) {
	90	if (Vflag)
	91	el_set(el, EL_EDITOR, "vi");
	92	else if (Eflag)
	93	el_set(el, EL_EDITOR, "emacs");
	94	}
dc06984c MT	95	} else {
	96	INTOFF;
	97	if (el) { /* no editing if not interactive */
	98	el_end(el);
	99	el = NULL;
	100	}
	101	if (hist) {
	102	history_end(hist);
	103	hist = NULL;
	104	}
	105	INTON;
	106	}
	107	}
	108
	109	sethistsize() {
	110	char *cp;
	111	int histsize;
	112
	113	if (hist != NULL) {
	114	cp = lookupvar("HISTSIZE");
	115	if (cp == NULL \|\| *cp == '\0' \|\|
	116	(histsize = atoi(cp)) < 0)
	117	histsize = 100;
f7280c66 MT	118	history(hist, H_EVENT, histsize);
	119	}
	120	}
	121
	122	/*
	123	* This command is provided since POSIX decided to standardize
	124	* the Korn shell fc command. Oh well...
	125	*/
	126	histcmd(argc, argv)
	127	char *argv[];
	128	{
	129	extern char *optarg;
	130	extern int optind, optopt, optreset;
	131	int ch;
	132	char *editor = NULL;
	133	const HistEvent *he;
	134	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
	135	int i;
	136	char firststr, laststr;
	137	int first, last, direction;
	138	char pat = NULL, repl; /* ksh "fc old=new" crap */
	139	static int active = 0;
	140	struct jmploc jmploc;
	141	struct jmploc *volatile savehandler;
	142	char editfile[MAXPATHLEN + 1];
	143	FILE *efp;
	144
	145	if (hist == NULL)
	146	error("history not active");
c77caef5 KB	147
	148	if (argc == 1)
	149	error("missing history argument");
f7280c66 MT	150
	151	optreset = 1; optind = 1; /* initialize getopt */
	152	while (not_fcnumber(argv[optind]) &&
	153	(ch = getopt(argc, argv, ":e:lnrs")) != EOF)
	154	switch ((char)ch) {
	155	case 'e':
	156	editor = optarg;
	157	break;
	158	case 'l':
	159	lflg = 1;
	160	break;
	161	case 'n':
	162	nflg = 1;
	163	break;
	164	case 'r':
	165	rflg = 1;
	166	break;
	167	case 's':
	168	sflg = 1;
	169	break;
	170	case ':':
	171	error("option -%c expects argument", optopt);
	172	case '?':
	173	default:
	174	error("unknown option: -%c", optopt);
	175	}
	176	argc -= optind, argv += optind;
	177
	178	/*
	179	* If executing...
	180	*/
	181	if (lflg == 0 \|\| editor \|\| sflg) {
	182	lflg = 0; /* ignore */
	183	editfile[0] = '\0';
	184	/*
	185	* Catch interrupts to reset active counter and
	186	* cleanup temp files.
	187	*/
	188	if (setjmp(jmploc.loc)) {
	189	active = 0;
	190	if (*editfile)
	191	unlink(editfile);
	192	handler = savehandler;
	193	longjmp(handler->loc, 1);
	194	}
	195	savehandler = handler;
	196	handler = &jmploc;
	197	if (++active > MAXHISTLOOPS) {
	198	active = 0;
	199	displayhist = 0;
	200	error("called recursively too many times");
	201	}
	202	/*
	203	* Set editor.
	204	*/
	205	if (sflg == 0) {
	206	if (editor == NULL &&
4fcca4ff MT	207	(editor = bltinlookup("FCEDIT", 1)) == NULL &&
4fcca4ff MT	208	(editor = bltinlookup("EDITOR", 1)) == NULL)
f7280c66 MT	209	editor = DEFEDITOR;
	210	if (editor[0] == '-' && editor[1] == '\0') {
	211	sflg = 1; /* no edit */
	212	editor = NULL;
	213	}
	214	}
	215	}
	216
	217	/*
	218	* If executing, parse [old=new] now
	219	*/
	220	if (lflg == 0 && argc > 0 &&
	221	((repl = strchr(argv[0], '=')) != NULL)) {
	222	pat = argv[0];
	223	*repl++ = '\0';
	224	argc--, argv++;
	225	}
	226	/*
	227	* determine [first] and [last]
	228	*/
	229	switch (argc) {
	230	case 0:
	231	firststr = lflg ? "-16" : "-1";
	232	laststr = "-1";
	233	break;
	234	case 1:
	235	firststr = argv[0];
	236	laststr = lflg ? "-1" : argv[0];
	237	break;
	238	case 2:
	239	firststr = argv[0];
	240	laststr = argv[1];
	241	break;
	242	default:
	243	error("too many args");
	244	}
	245	/*
	246	* Turn into event numbers.
	247	*/
	248	first = str_to_event(firststr, 0);
	249	last = str_to_event(laststr, 1);
	250
	251	if (rflg) {
	252	i = last;
	253	last = first;
	254	first = i;
	255	}
	256	/*
	257	* XXX - this should not depend on the event numbers
	258	* always increasing. Add sequence numbers or offset
	259	* to the history element in next (diskbased) release.
	260	*/
	261	direction = first < last ? H_PREV : H_NEXT;
	262
	263	/*
	264	* If editing, grab a temp file.
	265	*/
	266	if (editor) {
	267	int fd;
	268	INTOFF; /* easier */
	269	sprintf(editfile, "%s/_shXXXXXX", _PATH_TMP);
	270	if ((fd = mkstemp(editfile)) < 0)
	271	error("can't create temporary file %s", editfile);
	272	if ((efp = fdopen(fd, "w")) == NULL) {
273	close(fd);
274	error("can't allocate stdio buffer for temp\n");
275	}
276	}
277
278	/*
279	* Loop through selected history events. If listing or executing,
280	* do it now. Otherwise, put into temp file and call the editor
281	* after.
282	*
283	* The history interface needs rethinking, as the following
284	* convolutions will demonstrate.
285	*/
286	history(hist, H_FIRST);
287	he = history(hist, H_NEXT_EVENT, first);
288	for (;he != NULL; he = history(hist, direction)) {
289	if (lflg) {
290	if (!nflg)
291	out1fmt("%5d ", he->num);
292	out1str(he->str);
293	} else {
294	char *s = pat ?
295	fc_replace(he->str, pat, repl) : (char *)he->str;
296
297	if (sflg) {
298	if (displayhist) {
299	out2str(s);
300	}
301	evalstring(s);
302	if (displayhist && hist) {
303	/*
304	* XXX what about recursive and
305	* relative histnums.
306	*/
307	history(hist, H_ENTER, s);
308	}
309	} else
310	fputs(s, efp);
311	}
312	/*
313	* At end? (if we were to loose last, we'd sure be
314	* messed up).
315	*/
316	if (he->num == last)
317	break;
318	}
319	if (editor) {
320	char *editcmd;
321
322	fclose(efp);
323	editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
324	sprintf(editcmd, "%s %s", editor, editfile);
325	evalstring(editcmd); /* XXX - should use no JC command */
326	INTON;
327	readcmdfile(editfile); /* XXX - should read back - quick tst */
328	unlink(editfile);
329	}
330
331	if (lflg == 0 && active > 0)
332	--active;
333	if (displayhist)
334	displayhist = 0;
335	}
336
337	STATIC char *
338	fc_replace(s, p, r)
339	const char *s;
340	char p, r;
341	{
342	char *dest;
343	int plen = strlen(p);
344
345	STARTSTACKSTR(dest);
346	while (*s) {
347	if (s == p && strncmp(s, p, plen) == 0) {
348	while (*r)
349	STPUTC(*r++, dest);
350	s += plen;
351	p = '\0'; / so no more matches */
352	} else
353	STPUTC(*s++, dest);
354	}
355	STACKSTRNUL(dest);
356	dest = grabstackstr(dest);
357
358	return (dest);
359	}
360
361	not_fcnumber(s)
362	char *s;
363	{
364	if (*s == '-')
365	s++;
366	return (!is_number(s));
367	}
368
369	str_to_event(str, last)
370	char *str;
371	int last;
372	{
373	const HistEvent *he;
374	char *s = str;
375	int relative = 0;
376	int i, j;
377
378	he = history(hist, H_FIRST);
379	switch (*s) {
380	case '-':
381	relative = 1;
382	/FALLTHROUGH/
383	case '+':
384	s++;
385	}
386	if (is_number(s)) {
387	i = atoi(s);
388	if (relative) {
389	while (he != NULL && i--) {
390	he = history(hist, H_NEXT);
391	}
392	if (he == NULL)
393	he = history(hist, H_LAST);
394	} else {
395	he = history(hist, H_NEXT_EVENT, i);
396	if (he == NULL) {
397	/*
398	* the notion of first and last is
399	* backwards to that of the history package
400	*/
401	he = history(hist, last ? H_FIRST : H_LAST);
402	}
403	}
404	if (he == NULL)
405	error("history number %s not found (internal error)",
406	str);
407	} else {
408	/*
409	* pattern
410	*/
ba8ff910	411	he = history(hist, H_PREV_STR, str);
f7280c66 MT	412	if (he == NULL)
f7280c66 MT	413	error("history pattern not found: %s", str);
dc06984c	414	}
f7280c66	415	return (he->num);
dc06984c	416	}