[unix-history] / .ref-fdb8e4aac282b72d4670aa3a26d9bba07afc7e6f / usr / src / sbin / fsck / preen.c

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)preen.c	5.6 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fstab.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

char	*rawname(), *unrawname(), *blockcheck();

struct part {
	struct	part *next;		/* forward link of partitions on disk */
	char	*name;			/* device name */
	char	*fsname;		/* mounted filesystem name */
	long	auxdata;		/* auxillary data for application */
} *badlist, **badnext = &badlist;

struct disk {
	char	*name;			/* disk base name */
	struct	disk *next;		/* forward link for list of disks */
	struct	part *part;		/* head of list of partitions on disk */
	int	pid;			/* If != 0, pid of proc working on */
} *disks;

int	nrun, ndisks;
char	hotroot;

checkfstab(preen, maxrun, docheck, chkit)
	int preen, maxrun;
	int (*docheck)(), (*chkit)();
{
	register struct fstab *fsp;
	register struct disk *dk, *nextdisk;
	register struct part *pt;
	int ret, pid, retcode, passno, sumstatus, status;
	long auxdata;
	char *name;

	sumstatus = 0;
	for (passno = 1; passno <= 2; passno++) {
		if (setfsent() == 0) {
			fprintf(stderr, "Can't open checklist file: %s\n",
			    _PATH_FSTAB);
			return (8);
		}
		while ((fsp = getfsent()) != 0) {
			if ((auxdata = (*docheck)(fsp)) == 0)
				continue;
			if (preen == 0 || passno == 1 && fsp->fs_passno == 1) {
				if (name = blockcheck(fsp->fs_spec)) {
					if (sumstatus = (*chkit)(name,
					    fsp->fs_file, auxdata, 0))
						return (sumstatus);
				} else if (preen)
					return (8);
			} else if (passno == 2 && fsp->fs_passno > 1) {
				if ((name = blockcheck(fsp->fs_spec)) == NULL) {
					fprintf(stderr, "BAD DISK NAME %s\n",
						fsp->fs_spec);
					sumstatus |= 8;
					continue;
				}
				addpart(name, fsp->fs_file, auxdata);
			}
		}
		if (preen == 0)
			return (0);
	}
	if (preen) {
		if (maxrun == 0)
			maxrun = ndisks;
		if (maxrun > ndisks)
			maxrun = ndisks;
		nextdisk = disks;
		for (passno = 0; passno < maxrun; ++passno) {
			while (ret = startdisk(nextdisk, chkit) && nrun > 0)
				sleep(10);
			if (ret)
				return (ret);
			nextdisk = nextdisk->next;
		}
		while ((pid = wait(&status)) != -1) {
			for (dk = disks; dk; dk = dk->next)
				if (dk->pid == pid)
					break;
			if (dk == 0) {
				printf("Unknown pid %d\n", pid);
				continue;
			}
			if (WIFEXITED(status))
				retcode = WEXITSTATUS(status);
			else
				retcode = 0;
			if (WIFSIGNALED(status)) {
				printf("%s (%s): EXITED WITH SIGNAL %d\n",
					dk->part->name, dk->part->fsname,
					WTERMSIG(status));
				retcode = 8;
			}
			if (retcode != 0) {
				sumstatus |= retcode;
				*badnext = dk->part;
				badnext = &dk->part->next;
				dk->part = dk->part->next;
				*badnext = NULL;
			} else
				dk->part = dk->part->next;
			dk->pid = 0;
			nrun--;
			if (dk->part == NULL)
				ndisks--;

			if (nextdisk == NULL) {
				if (dk->part) {
					while (ret = startdisk(dk, chkit) &&
					    nrun > 0)
						sleep(10);
					if (ret)
						return (ret);
				}
			} else if (nrun < maxrun && nrun < ndisks) {
				for ( ;; ) {
					if ((nextdisk = nextdisk->next) == NULL)
						nextdisk = disks;
					if (nextdisk->part != NULL &&
					    nextdisk->pid == 0)
						break;
				}
				while (ret = startdisk(nextdisk, chkit) &&
				    nrun > 0)
					sleep(10);
				if (ret)
					return (ret);
			}
		}
	}
	if (sumstatus) {
		if (badlist == 0)
			return (sumstatus);
		fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
			badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
		for (pt = badlist; pt; pt = pt->next)
			fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
			    pt->next ? ", " : "\n");
		return (sumstatus);
	}
	(void)endfsent();
	return (0);
}

struct disk *
finddisk(name)
	char *name;
{
	register struct disk *dk, **dkp;
	register char *p;
	size_t len;

	for (p = name + strlen(name) - 1; p >= name; --p)
		if (isdigit(*p)) {
			len = p - name + 1;
			break;
		}
	if (p < name)
		len = strlen(name);

	for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
		if (strncmp(dk->name, name, len) == 0 &&
		    dk->name[len] == 0)
			return (dk);
	}
	if ((*dkp = (struct disk *)malloc(sizeof(struct disk))) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	dk = *dkp;
	if ((dk->name = malloc(len + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	(void)strncpy(dk->name, name, len);
	dk->name[len] = '\0';
	dk->part = NULL;
	dk->next = NULL;
	dk->pid = 0;
	ndisks++;
	return (dk);
}

addpart(name, fsname, auxdata)
	char *name, *fsname;
	long auxdata;
{
	struct disk *dk = finddisk(name);
	register struct part *pt, **ppt = &dk->part;

	for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
		if (strcmp(pt->name, name) == 0) {
			printf("%s in fstab more than once!\n", name);
			return;
		}
	if ((*ppt = (struct part *)malloc(sizeof(struct part))) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	pt = *ppt;
	if ((pt->name = malloc(strlen(name) + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	(void)strcpy(pt->name, name);
	if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	(void)strcpy(pt->fsname, fsname);
	pt->next = NULL;
	pt->auxdata = auxdata;
}

startdisk(dk, checkit)
	register struct disk *dk;
	int (*checkit)();
{
	register struct part *pt = dk->part;

	dk->pid = fork();
	if (dk->pid < 0) {
		perror("fork");
		return (8);
	}
	if (dk->pid == 0)
		exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1));
	nrun++;
	return (0);
}

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

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

char *
unrawname(name)
	char *name;
{
	char *dp;
	struct stat stb;

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

char *
rawname(name)
	char *name;
{
	static char rawbuf[32];
	char *dp;

	if ((dp = rindex(name, '/')) == 0)
		return (0);
	*dp = 0;
	(void)strcpy(rawbuf, name);
	*dp = '/';
	(void)strcat(rawbuf, "/r");
	(void)strcat(rawbuf, dp + 1);
	return (rawbuf);
}
Commit	Line	Data
5211717f KM	1	/*
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
70ab3c27	5	* %sccs.include.redist.c%
5211717f KM	6	*/
	7
	8	#ifndef lint
d08e3849	9	static char sccsid[] = "@(#)preen.c 5.6 (Berkeley) %G%";
5211717f KM	10	#endif /* not lint */
	11
	12	#include <sys/param.h>
	13	#include <sys/stat.h>
	14	#include <sys/wait.h>
	15	#include <fstab.h>
38dde0cd	16	#include <string.h>
5211717f	17	#include <stdio.h>
d72e970b	18	#include <stdlib.h>
5211717f KM	19	#include <ctype.h>
5211717f KM	20
d72e970b	21	char rawname(), unrawname(), *blockcheck();
5211717f KM	22
	23	struct part {
	24	struct part next; / forward link of partitions on disk */
	25	char name; / device name */
	26	char fsname; / mounted filesystem name */
	27	long auxdata; /* auxillary data for application */
	28	} badlist, *badnext = &badlist;
	29
	30	struct disk {
	31	char name; / disk base name */
	32	struct disk next; / forward link for list of disks */
	33	struct part part; / head of list of partitions on disk */
	34	int pid; /* If != 0, pid of proc working on */
	35	} *disks;
	36
5f229d0b KM	37	int nrun, ndisks;
5f229d0b KM	38	char hotroot;
5211717f KM	39
	40	checkfstab(preen, maxrun, docheck, chkit)
	41	int preen, maxrun;
	42	int (docheck)(), (chkit)();
	43	{
	44	register struct fstab *fsp;
	45	register struct disk dk, nextdisk;
	46	register struct part *pt;
	47	int ret, pid, retcode, passno, sumstatus, status;
	48	long auxdata;
	49	char *name;
	50
	51	sumstatus = 0;
	52	for (passno = 1; passno <= 2; passno++) {
	53	if (setfsent() == 0) {
	54	fprintf(stderr, "Can't open checklist file: %s\n",
	55	_PATH_FSTAB);
	56	return (8);
	57	}
	58	while ((fsp = getfsent()) != 0) {
	59	if ((auxdata = (*docheck)(fsp)) == 0)
	60	continue;
	61	if (preen == 0 \|\| passno == 1 && fsp->fs_passno == 1) {
	62	if (name = blockcheck(fsp->fs_spec)) {
	63	if (sumstatus = (*chkit)(name,
d08e3849	64	fsp->fs_file, auxdata, 0))
5211717f KM	65	return (sumstatus);
	66	} else if (preen)
	67	return (8);
	68	} else if (passno == 2 && fsp->fs_passno > 1) {
	69	if ((name = blockcheck(fsp->fs_spec)) == NULL) {
	70	fprintf(stderr, "BAD DISK NAME %s\n",
	71	fsp->fs_spec);
	72	sumstatus \|= 8;
	73	continue;
	74	}
	75	addpart(name, fsp->fs_file, auxdata);
	76	}
	77	}
	78	if (preen == 0)
	79	return (0);
	80	}
	81	if (preen) {
	82	if (maxrun == 0)
	83	maxrun = ndisks;
	84	if (maxrun > ndisks)
	85	maxrun = ndisks;
	86	nextdisk = disks;
	87	for (passno = 0; passno < maxrun; ++passno) {
	88	while (ret = startdisk(nextdisk, chkit) && nrun > 0)
	89	sleep(10);
	90	if (ret)
	91	return (ret);
	92	nextdisk = nextdisk->next;
	93	}
	94	while ((pid = wait(&status)) != -1) {
	95	for (dk = disks; dk; dk = dk->next)
	96	if (dk->pid == pid)
	97	break;
	98	if (dk == 0) {
	99	printf("Unknown pid %d\n", pid);
	100	continue;
	101	}
	102	if (WIFEXITED(status))
	103	retcode = WEXITSTATUS(status);
	104	else
	105	retcode = 0;
	106	if (WIFSIGNALED(status)) {
	107	printf("%s (%s): EXITED WITH SIGNAL %d\n",
	108	dk->part->name, dk->part->fsname,
	109	WTERMSIG(status));
	110	retcode = 8;
	111	}
	112	if (retcode != 0) {
	113	sumstatus \|= retcode;
	114	*badnext = dk->part;
	115	badnext = &dk->part->next;
	116	dk->part = dk->part->next;
	117	*badnext = NULL;
	118	} else
	119	dk->part = dk->part->next;
	120	dk->pid = 0;
	121	nrun--;
	122	if (dk->part == NULL)
	123	ndisks--;
	124
	125	if (nextdisk == NULL) {
	126	if (dk->part) {
	127	while (ret = startdisk(dk, chkit) &&
	128	nrun > 0)
129	sleep(10);
130	if (ret)
131	return (ret);
132	}
133	} else if (nrun < maxrun && nrun < ndisks) {
134	for ( ;; ) {
135	if ((nextdisk = nextdisk->next) == NULL)
136	nextdisk = disks;
137	if (nextdisk->part != NULL &&
138	nextdisk->pid == 0)
139	break;
140	}
141	while (ret = startdisk(nextdisk, chkit) &&
142	nrun > 0)
143	sleep(10);
144	if (ret)
145	return (ret);
146	}
147	}
148	}
149	if (sumstatus) {
150	if (badlist == 0)
151	return (sumstatus);
152	fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
153	badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
154	for (pt = badlist; pt; pt = pt->next)
155	fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
156	pt->next ? ", " : "\n");
157	return (sumstatus);
158	}
159	(void)endfsent();
160	return (0);
161	}
162
163	struct disk *
164	finddisk(name)
165	char *name;
166	{
167	register struct disk dk, *dkp;
168	register char *p;
d72e970b	169	size_t len;
5211717f KM	170
	171	for (p = name + strlen(name) - 1; p >= name; --p)
	172	if (isdigit(*p)) {
	173	len = p - name + 1;
	174	break;
	175	}
	176	if (p < name)
	177	len = strlen(name);
	178
	179	for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
	180	if (strncmp(dk->name, name, len) == 0 &&
	181	dk->name[len] == 0)
	182	return (dk);
	183	}
	184	if ((dkp = (struct disk )malloc(sizeof(struct disk))) == NULL) {
	185	fprintf(stderr, "out of memory");
	186	exit (8);
	187	}
	188	dk = *dkp;
d72e970b	189	if ((dk->name = malloc(len + 1)) == NULL) {
5211717f KM	190	fprintf(stderr, "out of memory");
	191	exit (8);
	192	}
d72e970b	193	(void)strncpy(dk->name, name, len);
5211717f KM	194	dk->name[len] = '\0';
	195	dk->part = NULL;
	196	dk->next = NULL;
	197	dk->pid = 0;
	198	ndisks++;
	199	return (dk);
	200	}
	201
	202	addpart(name, fsname, auxdata)
	203	char name, fsname;
	204	long auxdata;
	205	{
	206	struct disk *dk = finddisk(name);
	207	register struct part pt, *ppt = &dk->part;
	208
	209	for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
	210	if (strcmp(pt->name, name) == 0) {
	211	printf("%s in fstab more than once!\n", name);
	212	return;
	213	}
	214	if ((ppt = (struct part )malloc(sizeof(struct part))) == NULL) {
	215	fprintf(stderr, "out of memory");
	216	exit (8);
	217	}
	218	pt = *ppt;
d72e970b	219	if ((pt->name = malloc(strlen(name) + 1)) == NULL) {
5211717f KM	220	fprintf(stderr, "out of memory");
	221	exit (8);
	222	}
d72e970b KM	223	(void)strcpy(pt->name, name);
d72e970b KM	224	if ((pt->fsname = malloc(strlen(fsname) + 1)) == NULL) {
5211717f KM	225	fprintf(stderr, "out of memory");
	226	exit (8);
	227	}
d72e970b	228	(void)strcpy(pt->fsname, fsname);
5211717f KM	229	pt->next = NULL;
	230	pt->auxdata = auxdata;
	231	}
	232
	233	startdisk(dk, checkit)
	234	register struct disk *dk;
	235	int (*checkit)();
	236	{
	237	register struct part *pt = dk->part;
	238
	239	dk->pid = fork();
	240	if (dk->pid < 0) {
	241	perror("fork");
	242	return (8);
	243	}
	244	if (dk->pid == 0)
d08e3849	245	exit((*checkit)(pt->name, pt->fsname, pt->auxdata, 1));
5211717f KM	246	nrun++;
	247	return (0);
	248	}
	249
	250	char *
	251	blockcheck(name)
	252	char *name;
	253	{
	254	struct stat stslash, stblock, stchar;
	255	char *raw;
	256	int retried = 0;
	257
	258	hotroot = 0;
	259	if (stat("/", &stslash) < 0) {
	260	perror("/");
	261	printf("Can't stat root\n");
	262	return (0);
	263	}
	264	retry:
	265	if (stat(name, &stblock) < 0) {
	266	perror(name);
	267	printf("Can't stat %s\n", name);
	268	return (0);
	269	}
	270	if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
	271	if (stslash.st_dev == stblock.st_rdev)
	272	hotroot++;
	273	raw = rawname(name);
	274	if (stat(raw, &stchar) < 0) {
	275	perror(raw);
	276	printf("Can't stat %s\n", raw);
	277	return (name);
	278	}
	279	if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
	280	return (raw);
	281	} else {
	282	printf("%s is not a character device\n", raw);
	283	return (name);
	284	}
	285	} else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) {
	286	name = unrawname(name);
	287	retried++;
	288	goto retry;
	289	}
	290	printf("Can't make sense out of name %s\n", name);
	291	return (0);
	292	}
	293
	294	char *
	295	unrawname(name)
	296	char *name;
	297	{
	298	char *dp;
	299	struct stat stb;
	300
	301	if ((dp = rindex(name, '/')) == 0)
	302	return (name);
	303	if (stat(name, &stb) < 0)
	304	return (name);
	305	if ((stb.st_mode & S_IFMT) != S_IFCHR)
	306	return (name);
	307	if (*(dp + 1) != 'r')
	308	return (name);
	309	(void)strcpy(dp + 1, dp + 2);
310	return (name);
311	}
312
313	char *
314	rawname(name)
315	char *name;
316	{
317	static char rawbuf[32];
318	char *dp;
319
320	if ((dp = rindex(name, '/')) == 0)
321	return (0);
322	*dp = 0;
323	(void)strcpy(rawbuf, name);
324	*dp = '/';
325	(void)strcat(rawbuf, "/r");
326	(void)strcat(rawbuf, dp + 1);
327	return (rawbuf);
328	}