[unix-history] / usr / src / usr.bin / xstr / xstr.c

/*
 * Copyright (c) 1980 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)xstr.c	5.5 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <signal.h>
#include <stdio.h>
#include <ctype.h>
#include "pathnames.h"

/*
 * xstr - extract and hash strings in a C program
 *
 * Bill Joy UCB
 * November, 1978
 */

#define	ignore(a)	((void) a)

char	*calloc();
off_t	tellpt;
off_t	hashit();
char	*mktemp();
int	onintr();
char	*savestr();
char	*strcat();
char	*strcpy();
off_t	yankstr();

off_t	mesgpt;
char	*strings =	"strings";

int	cflg;
int	vflg;
int	readstd;

main(argc, argv)
	int argc;
	char *argv[];
{

	argc--, argv++;
	while (argc > 0 && argv[0][0] == '-') {
		register char *cp = &(*argv++)[1];

		argc--;
		if (*cp == 0) {
			readstd++;
			continue;
		}
		do switch (*cp++) {

		case 'c':
			cflg++;
			continue;

		case 'v':
			vflg++;
			continue;

		default:
			fprintf(stderr, "usage: xstr [ -v ] [ -c ] [ - ] [ name ... ]\n");
		} while (*cp);
	}
	if (signal(SIGINT, SIG_IGN) == SIG_DFL)
		signal(SIGINT, onintr);
	if (cflg || argc == 0 && !readstd)
		inithash();
	else
		strings = mktemp(savestr(_PATH_TMP));
	while (readstd || argc > 0) {
		if (freopen("x.c", "w", stdout) == NULL)
			perror("x.c"), exit(1);
		if (!readstd && freopen(argv[0], "r", stdin) == NULL)
			perror(argv[0]), exit(2);
		process("x.c");
		if (readstd == 0)
			argc--, argv++;
		else
			readstd = 0;
	};
	flushsh();
	if (cflg == 0)
		xsdotc();
	if (strings[0] == '/')
		ignore(unlink(strings));
	exit(0);
}

char linebuf[BUFSIZ];

process(name)
	char *name;
{
	char *cp;
	register int c;
	register int incomm = 0;
	int ret;

	printf("extern char\txstr[];\n");
	for (;;) {
		if (fgets(linebuf, sizeof linebuf, stdin) == NULL) {
			if (ferror(stdin)) {
				perror(name);
				exit(3);
			}
			break;
		}
		if (linebuf[0] == '#') {
			if (linebuf[1] == ' ' && isdigit(linebuf[2]))
				printf("#line%s", &linebuf[1]);
			else
				printf("%s", linebuf);
			continue;
		}
		for (cp = linebuf; c = *cp++;) switch (c) {
			
		case '"':
			if (incomm)
				goto def;
			if ((ret = (int) yankstr(&cp)) == -1)
				goto out;
			printf("(&xstr[%d])", ret);
			break;

		case '\'':
			if (incomm)
				goto def;
			putchar(c);
			if (*cp)
				putchar(*cp++);
			break;

		case '/':
			if (incomm || *cp != '*')
				goto def;
			incomm = 1;
			cp++;
			printf("/*");
			continue;

		case '*':
			if (incomm && *cp == '/') {
				incomm = 0;
				cp++;
				printf("*/");
				continue;
			}
			goto def;
		
def:
		default:
			putchar(c);
			break;
		}
	}
out:
	if (ferror(stdout))
		perror("x.c"), onintr();
}

off_t
yankstr(cpp)
	register char **cpp;
{
	register char *cp = *cpp;
	register int c, ch;
	char dbuf[BUFSIZ];
	register char *dp = dbuf;
	register char *tp;

	while (c = *cp++) {
		switch (c) {

		case '"':
			cp++;
			goto out;

		case '\\':
			c = *cp++;
			if (c == 0)
				break;
			if (c == '\n') {
				if (fgets(linebuf, sizeof linebuf, stdin) 
				    == NULL) {
					if (ferror(stdin)) {
						perror("x.c");
						exit(3);
					}
					return(-1);
				}
				cp = linebuf;
				continue;
			}
			for (tp = "b\bt\tr\rn\nf\f\\\\\"\""; ch = *tp++; tp++)
				if (c == ch) {
					c = *tp;
					goto gotc;
				}
			if (!octdigit(c)) {
				*dp++ = '\\';
				break;
			}
			c -= '0';
			if (!octdigit(*cp))
				break;
			c <<= 3, c += *cp++ - '0';
			if (!octdigit(*cp))
				break;
			c <<= 3, c += *cp++ - '0';
			break;
		}
gotc:
		*dp++ = c;
	}
out:
	*cpp = --cp;
	*dp = 0;
	return (hashit(dbuf, 1));
}

octdigit(c)
	char c;
{

	return (isdigit(c) && c != '8' && c != '9');
}

inithash()
{
	char buf[BUFSIZ];
	register FILE *mesgread = fopen(strings, "r");

	if (mesgread == NULL)
		return;
	for (;;) {
		mesgpt = tellpt;
		if (fgetNUL(buf, sizeof buf, mesgread) == NULL)
			break;
		ignore(hashit(buf, 0));
	}
	ignore(fclose(mesgread));
}

fgetNUL(obuf, rmdr, file)
	char *obuf;
	register int rmdr;
	FILE *file;
{
	register c;
	register char *buf = obuf;

	while (--rmdr > 0 && (c = xgetc(file)) != 0 && c != EOF)
		*buf++ = c;
	*buf++ = 0;
	return ((feof(file) || ferror(file)) ? NULL : 1);
}

xgetc(file)
	FILE *file;
{

	tellpt++;
	return (getc(file));
}

#define	BUCKETS	128

struct	hash {
	off_t	hpt;
	char	*hstr;
	struct	hash *hnext;
	short	hnew;
} bucket[BUCKETS];

off_t
hashit(str, new)
	char *str;
	int new;
{
	int i;
	register struct hash *hp, *hp0;

	hp = hp0 = &bucket[lastchr(str) & 0177];
	while (hp->hnext) {
		hp = hp->hnext;
		i = istail(str, hp->hstr);
		if (i >= 0)
			return (hp->hpt + i);
	}
	if ((hp = (struct hash *) calloc(1, sizeof (*hp))) == NULL) {
		perror("xstr");
		exit(8);
	}
	hp->hpt = mesgpt;
	hp->hstr = savestr(str);
	mesgpt += strlen(hp->hstr) + 1;
	hp->hnext = hp0->hnext;
	hp->hnew = new;
	hp0->hnext = hp;
	return (hp->hpt);
}

flushsh()
{
	register int i;
	register struct hash *hp;
	register FILE *mesgwrit;
	register int old = 0, new = 0;

	for (i = 0; i < BUCKETS; i++)
		for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext)
			if (hp->hnew)
				new++;
			else
				old++;
	if (new == 0 && old != 0)
		return;
	mesgwrit = fopen(strings, old ? "r+" : "w");
	if (mesgwrit == NULL)
		perror(strings), exit(4);
	for (i = 0; i < BUCKETS; i++)
		for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext) {
			found(hp->hnew, hp->hpt, hp->hstr);
			if (hp->hnew) {
				fseek(mesgwrit, hp->hpt, 0);
				ignore(fwrite(hp->hstr, strlen(hp->hstr) + 1, 1, mesgwrit));
				if (ferror(mesgwrit))
					perror(strings), exit(4);
			}
		}
	if (fclose(mesgwrit) == EOF)
		perror(strings), exit(4);
}

found(new, off, str)
	int new;
	off_t off;
	char *str;
{
	if (vflg == 0)
		return;
	if (!new)
		fprintf(stderr, "found at %d:", (int) off);
	else
		fprintf(stderr, "new at %d:", (int) off);
	prstr(str);
	fprintf(stderr, "\n");
}

prstr(cp)
	register char *cp;
{
	register int c;

	while (c = (*cp++ & 0377))
		if (c < ' ')
			fprintf(stderr, "^%c", c + '`');
		else if (c == 0177)
			fprintf(stderr, "^?");
		else if (c > 0200)
			fprintf(stderr, "\\%03o", c);
		else
			fprintf(stderr, "%c", c);
}

xsdotc()
{
	register FILE *strf = fopen(strings, "r");
	register FILE *xdotcf;

	if (strf == NULL)
		perror(strings), exit(5);
	xdotcf = fopen("xs.c", "w");
	if (xdotcf == NULL)
		perror("xs.c"), exit(6);
	fprintf(xdotcf, "char\txstr[] = {\n");
	for (;;) {
		register int i, c;

		for (i = 0; i < 8; i++) {
			c = getc(strf);
			if (ferror(strf)) {
				perror(strings);
				onintr();
			}
			if (feof(strf)) {
				fprintf(xdotcf, "\n");
				goto out;
			}
			fprintf(xdotcf, "0x%02x,", c);
		}
		fprintf(xdotcf, "\n");
	}
out:
	fprintf(xdotcf, "};\n");
	ignore(fclose(xdotcf));
	ignore(fclose(strf));
}

char *
savestr(cp)
	register char *cp;
{
	register char *dp;

	if ((dp = (char *) calloc(1, strlen(cp) + 1)) == NULL) {
		perror("xstr");
		exit(8);
	}
	return (strcpy(dp, cp));
}

lastchr(cp)
	register char *cp;
{

	while (cp[0] && cp[1])
		cp++;
	return (*cp);
}

istail(str, of)
	register char *str, *of;
{
	register int d = strlen(of) - strlen(str);

	if (d < 0 || strcmp(&of[d], str) != 0)
		return (-1);
	return (d);
}

onintr()
{

	ignore(signal(SIGINT, SIG_IGN));
	if (strings[0] == '/')
		ignore(unlink(strings));
	ignore(unlink("x.c"));
	ignore(unlink("xs.c"));
	exit(7);
}
Commit	Line	Data
f42904bc	1	/*
fa6237e9 KB	2	* Copyright (c) 1980 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
f42904bc DF	16	*/
	17
	18	#ifndef lint
	19	char copyright[] =
fa6237e9	20	"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
f42904bc	21	All rights reserved.\n";
fa6237e9	22	#endif /* not lint */
f42904bc DF	23
f42904bc DF	24	#ifndef lint
dc0e9d50	25	static char sccsid[] = "@(#)xstr.c 5.5 (Berkeley) %G%";
fa6237e9	26	#endif /* not lint */
f42904bc	27
4db42f7f BJ	28	#include <sys/types.h>
4db42f7f BJ	29	#include <signal.h>
dc0e9d50 KB	30	#include <stdio.h>
	31	#include <ctype.h>
	32	#include "pathnames.h"
4db42f7f BJ	33
	34	/*
	35	* xstr - extract and hash strings in a C program
	36	*
	37	* Bill Joy UCB
	38	* November, 1978
	39	*/
	40
654d8cfc	41	#define ignore(a) ((void) a)
4db42f7f BJ	42
	43	char *calloc();
	44	off_t tellpt;
	45	off_t hashit();
	46	char *mktemp();
	47	int onintr();
	48	char *savestr();
	49	char *strcat();
	50	char *strcpy();
	51	off_t yankstr();
	52
	53	off_t mesgpt;
	54	char *strings = "strings";
	55
	56	int cflg;
	57	int vflg;
	58	int readstd;
	59
	60	main(argc, argv)
	61	int argc;
	62	char *argv[];
	63	{
	64
	65	argc--, argv++;
	66	while (argc > 0 && argv[0][0] == '-') {
	67	register char cp = &(argv++)[1];
	68
	69	argc--;
	70	if (*cp == 0) {
	71	readstd++;
	72	continue;
	73	}
	74	do switch (*cp++) {
	75
	76	case 'c':
	77	cflg++;
	78	continue;
	79
	80	case 'v':
	81	vflg++;
	82	continue;
	83
	84	default:
	85	fprintf(stderr, "usage: xstr [ -v ] [ -c ] [ - ] [ name ... ]\n");
	86	} while (*cp);
	87	}
	88	if (signal(SIGINT, SIG_IGN) == SIG_DFL)
	89	signal(SIGINT, onintr);
	90	if (cflg \|\| argc == 0 && !readstd)
	91	inithash();
	92	else
dc0e9d50	93	strings = mktemp(savestr(_PATH_TMP));
4db42f7f BJ	94	while (readstd \|\| argc > 0) {
	95	if (freopen("x.c", "w", stdout) == NULL)
	96	perror("x.c"), exit(1);
	97	if (!readstd && freopen(argv[0], "r", stdin) == NULL)
	98	perror(argv[0]), exit(2);
	99	process("x.c");
	100	if (readstd == 0)
	101	argc--, argv++;
	102	else
	103	readstd = 0;
	104	};
	105	flushsh();
	106	if (cflg == 0)
	107	xsdotc();
	108	if (strings[0] == '/')
	109	ignore(unlink(strings));
	110	exit(0);
	111	}
	112
48b802d7 JB	113	char linebuf[BUFSIZ];
48b802d7 JB	114
4db42f7f BJ	115	process(name)
	116	char *name;
	117	{
	118	char *cp;
4db42f7f BJ	119	register int c;
4db42f7f BJ	120	register int incomm = 0;
48b802d7	121	int ret;
4db42f7f	122
48b802d7	123	printf("extern char\txstr[];\n");
4db42f7f BJ	124	for (;;) {
	125	if (fgets(linebuf, sizeof linebuf, stdin) == NULL) {
	126	if (ferror(stdin)) {
	127	perror(name);
	128	exit(3);
	129	}
	130	break;
	131	}
	132	if (linebuf[0] == '#') {
	133	if (linebuf[1] == ' ' && isdigit(linebuf[2]))
	134	printf("#line%s", &linebuf[1]);
	135	else
	136	printf("%s", linebuf);
	137	continue;
	138	}
	139	for (cp = linebuf; c = *cp++;) switch (c) {
	140
	141	case '"':
	142	if (incomm)
	143	goto def;
48b802d7 JB	144	if ((ret = (int) yankstr(&cp)) == -1)
	145	goto out;
	146	printf("(&xstr[%d])", ret);
4db42f7f BJ	147	break;
	148
	149	case '\'':
	150	if (incomm)
	151	goto def;
	152	putchar(c);
	153	if (*cp)
	154	putchar(*cp++);
	155	break;
	156
	157	case '/':
	158	if (incomm \|\| cp != '')
	159	goto def;
	160	incomm = 1;
	161	cp++;
	162	printf("/*");
	163	continue;
	164
	165	case '*':
	166	if (incomm && *cp == '/') {
	167	incomm = 0;
	168	cp++;
	169	printf("*/");
	170	continue;
	171	}
	172	goto def;
	173
	174	def:
	175	default:
	176	putchar(c);
	177	break;
	178	}
	179	}
48b802d7	180	out:
4db42f7f BJ	181	if (ferror(stdout))
	182	perror("x.c"), onintr();
	183	}
	184
	185	off_t
	186	yankstr(cpp)
	187	register char **cpp;
	188	{
	189	register char cp = cpp;
	190	register int c, ch;
	191	char dbuf[BUFSIZ];
	192	register char *dp = dbuf;
	193	register char *tp;
	194
	195	while (c = *cp++) {
	196	switch (c) {
	197
	198	case '"':
	199	cp++;
	200	goto out;
	201
	202	case '\\':
	203	c = *cp++;
	204	if (c == 0)
	205	break;
48b802d7 JB	206	if (c == '\n') {
	207	if (fgets(linebuf, sizeof linebuf, stdin)
	208	== NULL) {
	209	if (ferror(stdin)) {
	210	perror("x.c");
	211	exit(3);
	212	}
	213	return(-1);
	214	}
	215	cp = linebuf;
4db42f7f	216	continue;
48b802d7	217	}
4db42f7f BJ	218	for (tp = "b\bt\tr\rn\nf\f\\\\\"\""; ch = *tp++; tp++)
	219	if (c == ch) {
	220	c = *tp;
	221	goto gotc;
	222	}
	223	if (!octdigit(c)) {
	224	*dp++ = '\\';
	225	break;
	226	}
	227	c -= '0';
	228	if (!octdigit(*cp))
	229	break;
	230	c <<= 3, c += *cp++ - '0';
	231	if (!octdigit(*cp))
	232	break;
	233	c <<= 3, c += *cp++ - '0';
	234	break;
	235	}
	236	gotc:
	237	*dp++ = c;
	238	}
	239	out:
	240	*cpp = --cp;
	241	*dp = 0;
	242	return (hashit(dbuf, 1));
	243	}
	244
	245	octdigit(c)
	246	char c;
	247	{
	248
	249	return (isdigit(c) && c != '8' && c != '9');
	250	}
	251
	252	inithash()
	253	{
	254	char buf[BUFSIZ];
	255	register FILE *mesgread = fopen(strings, "r");
	256
	257	if (mesgread == NULL)
	258	return;
	259	for (;;) {
	260	mesgpt = tellpt;
	261	if (fgetNUL(buf, sizeof buf, mesgread) == NULL)
	262	break;
	263	ignore(hashit(buf, 0));
	264	}
	265	ignore(fclose(mesgread));
	266	}
	267
	268	fgetNUL(obuf, rmdr, file)
	269	char *obuf;
	270	register int rmdr;
	271	FILE *file;
	272	{
	273	register c;
	274	register char *buf = obuf;
	275
	276	while (--rmdr > 0 && (c = xgetc(file)) != 0 && c != EOF)
	277	*buf++ = c;
	278	*buf++ = 0;
	279	return ((feof(file) \|\| ferror(file)) ? NULL : 1);
	280	}
	281
282	xgetc(file)
283	FILE *file;
284	{
285
286	tellpt++;
287	return (getc(file));
288	}
289
290	#define BUCKETS 128
291
292	struct hash {
293	off_t hpt;
294	char *hstr;
295	struct hash *hnext;
296	short hnew;
297	} bucket[BUCKETS];
298
299	off_t
300	hashit(str, new)
301	char *str;
302	int new;
303	{
304	int i;
305	register struct hash hp, hp0;
306
307	hp = hp0 = &bucket[lastchr(str) & 0177];
308	while (hp->hnext) {
309	hp = hp->hnext;
310	i = istail(str, hp->hstr);
311	if (i >= 0)
312	return (hp->hpt + i);
313	}
654d8cfc KM	314	if ((hp = (struct hash ) calloc(1, sizeof (hp))) == NULL) {
	315	perror("xstr");
	316	exit(8);
	317	}
4db42f7f BJ	318	hp->hpt = mesgpt;
	319	hp->hstr = savestr(str);
	320	mesgpt += strlen(hp->hstr) + 1;
	321	hp->hnext = hp0->hnext;
	322	hp->hnew = new;
	323	hp0->hnext = hp;
	324	return (hp->hpt);
	325	}
	326
	327	flushsh()
	328	{
	329	register int i;
	330	register struct hash *hp;
	331	register FILE *mesgwrit;
	332	register int old = 0, new = 0;
	333
	334	for (i = 0; i < BUCKETS; i++)
	335	for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext)
	336	if (hp->hnew)
	337	new++;
	338	else
	339	old++;
	340	if (new == 0 && old != 0)
	341	return;
dd558f1f	342	mesgwrit = fopen(strings, old ? "r+" : "w");
f5affc92 BJ	343	if (mesgwrit == NULL)
f5affc92 BJ	344	perror(strings), exit(4);
4db42f7f BJ	345	for (i = 0; i < BUCKETS; i++)
	346	for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext) {
	347	found(hp->hnew, hp->hpt, hp->hstr);
	348	if (hp->hnew) {
	349	fseek(mesgwrit, hp->hpt, 0);
	350	ignore(fwrite(hp->hstr, strlen(hp->hstr) + 1, 1, mesgwrit));
	351	if (ferror(mesgwrit))
	352	perror(strings), exit(4);
	353	}
	354	}
654d8cfc KM	355	if (fclose(mesgwrit) == EOF)
654d8cfc KM	356	perror(strings), exit(4);
4db42f7f BJ	357	}
	358
	359	found(new, off, str)
	360	int new;
	361	off_t off;
	362	char *str;
	363	{
4db42f7f BJ	364	if (vflg == 0)
	365	return;
	366	if (!new)
	367	fprintf(stderr, "found at %d:", (int) off);
	368	else
	369	fprintf(stderr, "new at %d:", (int) off);
	370	prstr(str);
	371	fprintf(stderr, "\n");
	372	}
	373
	374	prstr(cp)
	375	register char *cp;
	376	{
	377	register int c;
	378
	379	while (c = (*cp++ & 0377))
	380	if (c < ' ')
	381	fprintf(stderr, "^%c", c + '`');
	382	else if (c == 0177)
	383	fprintf(stderr, "^?");
	384	else if (c > 0200)
	385	fprintf(stderr, "\\%03o", c);
	386	else
	387	fprintf(stderr, "%c", c);
	388	}
	389
	390	xsdotc()
	391	{
	392	register FILE *strf = fopen(strings, "r");
	393	register FILE *xdotcf;
	394
	395	if (strf == NULL)
	396	perror(strings), exit(5);
	397	xdotcf = fopen("xs.c", "w");
	398	if (xdotcf == NULL)
	399	perror("xs.c"), exit(6);
	400	fprintf(xdotcf, "char\txstr[] = {\n");
	401	for (;;) {
	402	register int i, c;
	403
	404	for (i = 0; i < 8; i++) {
	405	c = getc(strf);
	406	if (ferror(strf)) {
	407	perror(strings);
	408	onintr();
	409	}
	410	if (feof(strf)) {
	411	fprintf(xdotcf, "\n");
	412	goto out;
	413	}
	414	fprintf(xdotcf, "0x%02x,", c);
	415	}
	416	fprintf(xdotcf, "\n");
	417	}
	418	out:
	419	fprintf(xdotcf, "};\n");
	420	ignore(fclose(xdotcf));
	421	ignore(fclose(strf));
	422	}
	423
	424	char *
	425	savestr(cp)
	426	register char *cp;
	427	{
654d8cfc	428	register char *dp;
4db42f7f	429
654d8cfc KM	430	if ((dp = (char *) calloc(1, strlen(cp) + 1)) == NULL) {
	431	perror("xstr");
	432	exit(8);
	433	}
4db42f7f BJ	434	return (strcpy(dp, cp));
	435	}
	436
4db42f7f BJ	437	lastchr(cp)
	438	register char *cp;
	439	{
	440
	441	while (cp[0] && cp[1])
	442	cp++;
	443	return (*cp);
	444	}
	445
	446	istail(str, of)
	447	register char str, of;
	448	{
	449	register int d = strlen(of) - strlen(str);
	450
	451	if (d < 0 \|\| strcmp(&of[d], str) != 0)
	452	return (-1);
	453	return (d);
	454	}
	455
	456	onintr()
	457	{
	458
654d8cfc	459	ignore(signal(SIGINT, SIG_IGN));
4db42f7f BJ	460	if (strings[0] == '/')
	461	ignore(unlink(strings));
	462	ignore(unlink("x.c"));
	463	ignore(unlink("xs.c"));
	464	exit(7);
	465	}