[unix-history] / usr / src / sbin / fsck / main.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

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

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

#include <sys/param.h>
#include <sys/inode.h>
#include <sys/fs.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fstab.h>
#include <strings.h>
#include "fsck.h"

char	*rawname(), *unrawname(), *blockcheck();
int	catch(), catchquit(), voidquit();
int	returntosingle;
int	(*signal())();

main(argc, argv)
	int	argc;
	char	*argv[];
{
	struct fstab *fsp;
	int pid, passno, anygtr, sumstatus;
	char *name;

	sync();
	while (--argc > 0 && **++argv == '-') {
		switch (*++*argv) {

		case 'p':
			preen++;
			break;

		case 'b':
			if (argv[0][1] != '\0') {
				bflag = atoi(argv[0]+1);
			} else {
				bflag = atoi(*++argv);
				argc--;
			}
			printf("Alternate super block location: %d\n", bflag);
			break;

		case 'd':
			debug++;
			break;

		case 'n':	/* default no answer flag */
		case 'N':
			nflag++;
			yflag = 0;
			break;

		case 'y':	/* default yes answer flag */
		case 'Y':
			yflag++;
			nflag = 0;
			break;

		default:
			errexit("%c option?\n", **argv);
		}
	}
	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
		(void)signal(SIGINT, catch);
	if (preen)
		(void)signal(SIGQUIT, catchquit);
	if (argc) {
		while (argc-- > 0) {
			hotroot = 0;
			name = blockcheck(*argv++);
			checkfilesys(name);
		}
		exit(0);
	}
	sumstatus = 0;
	passno = 1;
	do {
		anygtr = 0;
		if (setfsent() == 0)
			errexit("Can't open checklist file: %s\n", FSTAB);
		while ((fsp = getfsent()) != 0) {
			if (strcmp(fsp->fs_type, FSTAB_RW) &&
			    strcmp(fsp->fs_type, FSTAB_RO) &&
			    strcmp(fsp->fs_type, FSTAB_RQ))
				continue;
			if (preen == 0 ||
			    passno == 1 && fsp->fs_passno == passno) {
				name = blockcheck(fsp->fs_spec);
				if (name != NULL)
					checkfilesys(name);
				else if (preen)
					exit(8);
			} else if (fsp->fs_passno > passno) {
				anygtr = 1;
			} else if (fsp->fs_passno == passno) {
				pid = fork();
				if (pid < 0) {
					perror("fork");
					exit(8);
				}
				if (pid == 0) {
					(void)signal(SIGQUIT, voidquit);
					name = blockcheck(fsp->fs_spec);
					if (name == NULL)
						exit(8);
					checkfilesys(name);
					exit(0);
				}
			}
		}
		if (preen) {
			union wait status;
			while (wait(&status) != -1)
				sumstatus |= status.w_retcode;
		}
		passno++;
	} while (anygtr);
	if (sumstatus)
		exit(8);
	(void)endfsent();
	if (returntosingle)
		exit(2);
	exit(0);
}

checkfilesys(filesys)
	char *filesys;
{
	daddr_t n_ffree, n_bfree;
	struct dups *dp;
	struct zlncnt *zlnp;

	devname = filesys;
	if (setup(filesys) == 0) {
		if (preen)
			pfatal("CAN'T CHECK FILE SYSTEM.");
		return;
	}
	/*
	 * 1: scan inodes tallying blocks used
	 */
	if (preen == 0) {
		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
		if (hotroot)
			printf("** Root file system\n");
		printf("** Phase 1 - Check Blocks and Sizes\n");
	}
	pass1();

	/*
	 * 1b: locate first references to duplicates, if any
	 */
	if (duplist) {
		if (preen)
			pfatal("INTERNAL ERROR: dups with -p");
		printf("** Phase 1b - Rescan For More DUPS\n");
		pass1b();
	}

	/*
	 * 2: traverse directories from root to mark all connected directories
	 */
	if (preen == 0)
		printf("** Phase 2 - Check Pathnames\n");
	pass2();

	/*
	 * 3: scan inodes looking for disconnected directories
	 */
	if (preen == 0)
		printf("** Phase 3 - Check Connectivity\n");
	pass3();

	/*
	 * 4: scan inodes looking for disconnected files; check reference counts
	 */
	if (preen == 0)
		printf("** Phase 4 - Check Reference Counts\n");
	pass4();

	/*
	 * 5: check and repair resource counts in cylinder groups
	 */
	if (preen == 0)
		printf("** Phase 5 - Check Cyl groups\n");
	pass5();

	/*
	 * print out summary statistics
	 */
	n_ffree = sblock.fs_cstotal.cs_nffree;
	n_bfree = sblock.fs_cstotal.cs_nbfree;
	pwarn("%d files, %d used, %d free ",
	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
	printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
	    n_ffree, n_bfree, (float)(n_ffree * 100) / sblock.fs_dsize);
	if (debug && (n_files -= imax - ROOTINO - sblock.fs_cstotal.cs_nifree))
		printf("%d files missing\n", n_files);
	if (debug) {
		n_blks += sblock.fs_ncg *
			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
		if (n_blks -= fmax - (n_ffree + sblock.fs_frag * n_bfree))
			printf("%d blocks missing\n", n_blks);
		if (duplist != NULL) {
			printf("The following duplicate blocks remain:");
			for (dp = duplist; dp; dp = dp->next)
				printf(" %d,", dp->dup);
			printf("\n");
		}
		if (zlnhead != NULL) {
			printf("The following zero link count inodes remain:");
			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
				printf(" %d,", zlnp->zlncnt);
			printf("\n");
		}
	}
	zlnhead = (struct zlncnt *)0;
	duplist = (struct dups *)0;
	if (dfile.mod) {
		(void)time(&sblock.fs_time);
		sbdirty();
	}
	ckfini();
	free(blockmap);
	free(statemap);
	free((char *)lncntp);
	if (!dfile.mod)
		return;
	if (!preen) {
		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
		if (hotroot)
			printf("\n***** REBOOT UNIX *****\n");
	}
	if (hotroot) {
		sync();
		exit(4);
	}
}

char *
blockcheck(name)
	char *name;
{
	struct stat stslash, stblock, stchar;
	char *raw;
	int looped = 0;

	hotroot = 0;
	if (stat("/", &stslash) < 0){
		printf("Can't stat root\n");
		return (0);
	}
retry:
	if (stat(name, &stblock) < 0){
		printf("Can't stat %s\n", name);
		return (0);
	}
	if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
		raw = rawname(name);
		if (stat(raw, &stchar) < 0){
			printf("Can't stat %s\n", raw);
			return (0);
		}
		if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
			if (stslash.st_dev == stblock.st_rdev) {
				hotroot++;
				raw = unrawname(name);
			}
			return (raw);
		} else {
			printf("%s is not a character device\n", raw);
			return (0);
		}
	} else if ((stblock.st_mode & S_IFMT) == S_IFCHR) {
		if (looped) {
			printf("Can't make sense out of name %s\n", name);
			return (0);
		}
		name = unrawname(name);
		looped++;
		goto retry;
	}
	printf("Can't make sense out of name %s\n", name);
	return (0);
}

char *
unrawname(cp)
	char *cp;
{
	char *dp = rindex(cp, '/');
	struct stat stb;

	if (dp == 0)
		return (cp);
	if (stat(cp, &stb) < 0)
		return (cp);
	if ((stb.st_mode&S_IFMT) != S_IFCHR)
		return (cp);
	if (*(dp+1) != 'r')
		return (cp);
	(void)strcpy(dp+1, dp+2);
	return (cp);
}

char *
rawname(cp)
	char *cp;
{
	static char rawbuf[32];
	char *dp = rindex(cp, '/');

	if (dp == 0)
		return (0);
	*dp = 0;
	(void)strcpy(rawbuf, cp);
	*dp = '/';
	(void)strcat(rawbuf, "/r");
	(void)strcat(rawbuf, dp+1);
	return (rawbuf);
}
Commit	Line	Data
76797561 DF	1	/*
	2	* Copyright (c) 1980 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
	7	#ifndef lint
	8	char copyright[] =
	9	"@(#) Copyright (c) 1980 Regents of the University of California.\n\
	10	All rights reserved.\n";
	11	#endif not lint
	12
fa95fc59	13	#ifndef lint
e8c2f9ee	14	static char sccsid[] = "@(#)main.c 5.5 (Berkeley) %G%";
76797561	15	#endif not lint
07670f7d	16
4d308541	17	#include <sys/param.h>
4d308541	18	#include <sys/inode.h>
f7635e39	19	#include <sys/fs.h>
7718c0e6 KM	20	#include <sys/stat.h>
	21	#include <sys/wait.h>
	22	#include <fstab.h>
	23	#include <strings.h>
f7635e39	24	#include "fsck.h"
6e884967	25
7718c0e6	26	char rawname(), unrawname(), *blockcheck();
3cfe4689 MK	27	int catch(), catchquit(), voidquit();
3cfe4689 MK	28	int returntosingle;
7718c0e6 KM	29	int (*signal())();
	30
	31	main(argc, argv)
	32	int argc;
	33	char *argv[];
	34	{
	35	struct fstab *fsp;
	36	int pid, passno, anygtr, sumstatus;
	37	char *name;
	38
	39	sync();
	40	while (--argc > 0 && **++argv == '-') {
	41	switch (++argv) {
	42
	43	case 'p':
	44	preen++;
	45	break;
	46
	47	case 'b':
	48	if (argv[0][1] != '\0') {
	49	bflag = atoi(argv[0]+1);
	50	} else {
	51	bflag = atoi(*++argv);
	52	argc--;
	53	}
	54	printf("Alternate super block location: %d\n", bflag);
	55	break;
	56
	57	case 'd':
	58	debug++;
	59	break;
	60
	61	case 'n': /* default no answer flag */
	62	case 'N':
	63	nflag++;
	64	yflag = 0;
	65	break;
	66
	67	case 'y': /* default yes answer flag */
	68	case 'Y':
	69	yflag++;
	70	nflag = 0;
	71	break;
	72
	73	default:
	74	errexit("%c option?\n", **argv);
	75	}
	76	}
	77	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
	78	(void)signal(SIGINT, catch);
3cfe4689 MK	79	if (preen)
3cfe4689 MK	80	(void)signal(SIGQUIT, catchquit);
7718c0e6 KM	81	if (argc) {
	82	while (argc-- > 0) {
	83	hotroot = 0;
e8c2f9ee KM	84	name = blockcheck(*argv++);
e8c2f9ee KM	85	checkfilesys(name);
7718c0e6 KM	86	}
	87	exit(0);
	88	}
	89	sumstatus = 0;
	90	passno = 1;
	91	do {
	92	anygtr = 0;
	93	if (setfsent() == 0)
	94	errexit("Can't open checklist file: %s\n", FSTAB);
	95	while ((fsp = getfsent()) != 0) {
	96	if (strcmp(fsp->fs_type, FSTAB_RW) &&
	97	strcmp(fsp->fs_type, FSTAB_RO) &&
	98	strcmp(fsp->fs_type, FSTAB_RQ))
	99	continue;
	100	if (preen == 0 \|\|
	101	passno == 1 && fsp->fs_passno == passno) {
	102	name = blockcheck(fsp->fs_spec);
	103	if (name != NULL)
	104	checkfilesys(name);
	105	else if (preen)
	106	exit(8);
	107	} else if (fsp->fs_passno > passno) {
	108	anygtr = 1;
	109	} else if (fsp->fs_passno == passno) {
	110	pid = fork();
	111	if (pid < 0) {
	112	perror("fork");
	113	exit(8);
	114	}
	115	if (pid == 0) {
3cfe4689	116	(void)signal(SIGQUIT, voidquit);
7718c0e6 KM	117	name = blockcheck(fsp->fs_spec);
	118	if (name == NULL)
	119	exit(8);
	120	checkfilesys(name);
	121	exit(0);
	122	}
	123	}
	124	}
	125	if (preen) {
	126	union wait status;
	127	while (wait(&status) != -1)
	128	sumstatus \|= status.w_retcode;
	129	}
	130	passno++;
	131	} while (anygtr);
	132	if (sumstatus)
	133	exit(8);
	134	(void)endfsent();
3cfe4689 MK	135	if (returntosingle)
3cfe4689 MK	136	exit(2);
7718c0e6 KM	137	exit(0);
	138	}
	139
d2c95d76 BJ	140	checkfilesys(filesys)
d2c95d76 BJ	141	char *filesys;
6e884967	142	{
993a756c	143	daddr_t n_ffree, n_bfree;
d4233021	144	struct dups *dp;
1a02fd3a	145	struct zlncnt *zlnp;
6e884967	146
d2c95d76 BJ	147	devname = filesys;
d2c95d76 BJ	148	if (setup(filesys) == 0) {
6e884967	149	if (preen)
d2c95d76	150	pfatal("CAN'T CHECK FILE SYSTEM.");
6e884967 KM	151	return;
6e884967 KM	152	}
993a756c KM	153	/*
	154	* 1: scan inodes tallying blocks used
	155	*/
690f77ba KM	156	if (preen == 0) {
690f77ba KM	157	printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
6e884967 KM	158	if (hotroot)
	159	printf("** Root file system\n");
	160	printf("** Phase 1 - Check Blocks and Sizes\n");
	161	}
d2c95d76 BJ	162	pass1();
d2c95d76 BJ	163
993a756c KM	164	/*
	165	* 1b: locate first references to duplicates, if any
	166	*/
62e6c152	167	if (duplist) {
d2c95d76 BJ	168	if (preen)
	169	pfatal("INTERNAL ERROR: dups with -p");
	170	printf("** Phase 1b - Rescan For More DUPS\n");
	171	pass1b();
	172	}
	173
993a756c KM	174	/*
	175	* 2: traverse directories from root to mark all connected directories
	176	*/
d2c95d76 BJ	177	if (preen == 0)
	178	printf("** Phase 2 - Check Pathnames\n");
	179	pass2();
	180
993a756c KM	181	/*
	182	* 3: scan inodes looking for disconnected directories
	183	*/
d2c95d76 BJ	184	if (preen == 0)
	185	printf("** Phase 3 - Check Connectivity\n");
	186	pass3();
	187
993a756c KM	188	/*
	189	* 4: scan inodes looking for disconnected files; check reference counts
	190	*/
d2c95d76 BJ	191	if (preen == 0)
	192	printf("** Phase 4 - Check Reference Counts\n");
	193	pass4();
	194
993a756c KM	195	/*
	196	* 5: check and repair resource counts in cylinder groups
	197	*/
d2c95d76 BJ	198	if (preen == 0)
	199	printf("** Phase 5 - Check Cyl groups\n");
	200	pass5();
	201
993a756c KM	202	/*
	203	* print out summary statistics
	204	*/
	205	n_ffree = sblock.fs_cstotal.cs_nffree;
	206	n_bfree = sblock.fs_cstotal.cs_nbfree;
8755a38b KM	207	pwarn("%d files, %d used, %d free ",
	208	n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
	209	printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
	210	n_ffree, n_bfree, (float)(n_ffree * 100) / sblock.fs_dsize);
993a756c KM	211	if (debug && (n_files -= imax - ROOTINO - sblock.fs_cstotal.cs_nifree))
	212	printf("%d files missing\n", n_files);
	213	if (debug) {
	214	n_blks += sblock.fs_ncg *
	215	(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
	216	n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
	217	n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
	218	if (n_blks -= fmax - (n_ffree + sblock.fs_frag * n_bfree))
	219	printf("%d blocks missing\n", n_blks);
d4233021 KM	220	if (duplist != NULL) {
	221	printf("The following duplicate blocks remain:");
	222	for (dp = duplist; dp; dp = dp->next)
	223	printf(" %d,", dp->dup);
	224	printf("\n");
	225	}
1a02fd3a KM	226	if (zlnhead != NULL) {
	227	printf("The following zero link count inodes remain:");
	228	for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
	229	printf(" %d,", zlnp->zlncnt);
	230	printf("\n");
	231	}
d2c95d76	232	}
1a02fd3a KM	233	zlnhead = (struct zlncnt *)0;
1a02fd3a KM	234	duplist = (struct dups *)0;
d2c95d76	235	if (dfile.mod) {
1a724405	236	(void)time(&sblock.fs_time);
d2c95d76 BJ	237	sbdirty();
	238	}
	239	ckfini();
	240	free(blockmap);
d2c95d76	241	free(statemap);
1a724405	242	free((char *)lncntp);
addfa1aa BJ	243	if (!dfile.mod)
	244	return;
	245	if (!preen) {
	246	printf("\n*** FILE SYSTEM WAS MODIFIED ***\n");
	247	if (hotroot)
	248	printf("\n*** REBOOT UNIX ***\n");
	249	}
	250	if (hotroot) {
	251	sync();
	252	exit(4);
f5971be7	253	}
f5971be7	254	}
7718c0e6 KM	255
	256	char *
	257	blockcheck(name)
	258	char *name;
	259	{
	260	struct stat stslash, stblock, stchar;
	261	char *raw;
	262	int looped = 0;
	263
	264	hotroot = 0;
	265	if (stat("/", &stslash) < 0){
	266	printf("Can't stat root\n");
	267	return (0);
	268	}
	269	retry:
	270	if (stat(name, &stblock) < 0){
	271	printf("Can't stat %s\n", name);
	272	return (0);
	273	}
e8c2f9ee	274	if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
7718c0e6 KM	275	raw = rawname(name);
	276	if (stat(raw, &stchar) < 0){
	277	printf("Can't stat %s\n", raw);
	278	return (0);
	279	}
e8c2f9ee	280	if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
7718c0e6 KM	281	if (stslash.st_dev == stblock.st_rdev) {
	282	hotroot++;
	283	raw = unrawname(name);
	284	}
	285	return (raw);
	286	} else {
	287	printf("%s is not a character device\n", raw);
	288	return (0);
	289	}
e8c2f9ee	290	} else if ((stblock.st_mode & S_IFMT) == S_IFCHR) {
7718c0e6 KM	291	if (looped) {
	292	printf("Can't make sense out of name %s\n", name);
	293	return (0);
	294	}
	295	name = unrawname(name);
	296	looped++;
	297	goto retry;
	298	}
	299	printf("Can't make sense out of name %s\n", name);
	300	return (0);
	301	}
	302
	303	char *
	304	unrawname(cp)
	305	char *cp;
	306	{
	307	char *dp = rindex(cp, '/');
	308	struct stat stb;
	309
	310	if (dp == 0)
	311	return (cp);
	312	if (stat(cp, &stb) < 0)
	313	return (cp);
	314	if ((stb.st_mode&S_IFMT) != S_IFCHR)
	315	return (cp);
	316	if (*(dp+1) != 'r')
	317	return (cp);
	318	(void)strcpy(dp+1, dp+2);
	319	return (cp);
	320	}
	321
	322	char *
	323	rawname(cp)
	324	char *cp;
	325	{
	326	static char rawbuf[32];
	327	char *dp = rindex(cp, '/');
	328
	329	if (dp == 0)
	330	return (0);
	331	*dp = 0;
	332	(void)strcpy(rawbuf, cp);
	333	*dp = '/';
	334	(void)strcat(rawbuf, "/r");
	335	(void)strcat(rawbuf, dp+1);
	336	return (rawbuf);
	337	}