[unix-history] / 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	5.4 (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 <ctype.h>

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

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))
						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;
	int 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((unsigned int)len + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	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((unsigned int)strlen(name) + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	strcpy(pt->name, name);
	if ((pt->fsname = malloc((unsigned int)strlen(fsname) + 1)) == NULL) {
		fprintf(stderr, "out of memory");
		exit (8);
	}
	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));
	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
70ab3c27	9	static char sccsid[] = "@(#)preen.c 5.4 (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 KM	17	#include <stdio.h>
	18	#include <ctype.h>
	19
	20	char rawname(), unrawname(), blockcheck(), malloc();
	21
	22	struct part {
	23	struct part next; / forward link of partitions on disk */
	24	char name; / device name */
	25	char fsname; / mounted filesystem name */
	26	long auxdata; /* auxillary data for application */
	27	} badlist, *badnext = &badlist;
	28
	29	struct disk {
	30	char name; / disk base name */
	31	struct disk next; / forward link for list of disks */
	32	struct part part; / head of list of partitions on disk */
	33	int pid; /* If != 0, pid of proc working on */
	34	} *disks;
	35
5f229d0b KM	36	int nrun, ndisks;
5f229d0b KM	37	char hotroot;
5211717f KM	38
	39	checkfstab(preen, maxrun, docheck, chkit)
	40	int preen, maxrun;
	41	int (docheck)(), (chkit)();
	42	{
	43	register struct fstab *fsp;
	44	register struct disk dk, nextdisk;
	45	register struct part *pt;
	46	int ret, pid, retcode, passno, sumstatus, status;
	47	long auxdata;
	48	char *name;
	49
	50	sumstatus = 0;
	51	for (passno = 1; passno <= 2; passno++) {
	52	if (setfsent() == 0) {
	53	fprintf(stderr, "Can't open checklist file: %s\n",
	54	_PATH_FSTAB);
	55	return (8);
	56	}
	57	while ((fsp = getfsent()) != 0) {
	58	if ((auxdata = (*docheck)(fsp)) == 0)
	59	continue;
	60	if (preen == 0 \|\| passno == 1 && fsp->fs_passno == 1) {
	61	if (name = blockcheck(fsp->fs_spec)) {
	62	if (sumstatus = (*chkit)(name,
	63	fsp->fs_file, auxdata))
	64	return (sumstatus);
	65	} else if (preen)
	66	return (8);
	67	} else if (passno == 2 && fsp->fs_passno > 1) {
	68	if ((name = blockcheck(fsp->fs_spec)) == NULL) {
	69	fprintf(stderr, "BAD DISK NAME %s\n",
	70	fsp->fs_spec);
	71	sumstatus \|= 8;
	72	continue;
	73	}
	74	addpart(name, fsp->fs_file, auxdata);
	75	}
	76	}
	77	if (preen == 0)
	78	return (0);
	79	}
	80	if (preen) {
	81	if (maxrun == 0)
	82	maxrun = ndisks;
	83	if (maxrun > ndisks)
	84	maxrun = ndisks;
	85	nextdisk = disks;
	86	for (passno = 0; passno < maxrun; ++passno) {
	87	while (ret = startdisk(nextdisk, chkit) && nrun > 0)
	88	sleep(10);
	89	if (ret)
	90	return (ret);
	91	nextdisk = nextdisk->next;
	92	}
	93	while ((pid = wait(&status)) != -1) {
	94	for (dk = disks; dk; dk = dk->next)
	95	if (dk->pid == pid)
	96	break;
	97	if (dk == 0) {
	98	printf("Unknown pid %d\n", pid);
	99	continue;
	100	}
	101	if (WIFEXITED(status))
102	retcode = WEXITSTATUS(status);
103	else
104	retcode = 0;
105	if (WIFSIGNALED(status)) {
106	printf("%s (%s): EXITED WITH SIGNAL %d\n",
107	dk->part->name, dk->part->fsname,
108	WTERMSIG(status));
109	retcode = 8;
110	}
111	if (retcode != 0) {
112	sumstatus \|= retcode;
113	*badnext = dk->part;
114	badnext = &dk->part->next;
115	dk->part = dk->part->next;
116	*badnext = NULL;
117	} else
118	dk->part = dk->part->next;
119	dk->pid = 0;
120	nrun--;
121	if (dk->part == NULL)
122	ndisks--;
123
124	if (nextdisk == NULL) {
125	if (dk->part) {
126	while (ret = startdisk(dk, chkit) &&
127	nrun > 0)
128	sleep(10);
129	if (ret)
130	return (ret);
131	}
132	} else if (nrun < maxrun && nrun < ndisks) {
133	for ( ;; ) {
134	if ((nextdisk = nextdisk->next) == NULL)
135	nextdisk = disks;
136	if (nextdisk->part != NULL &&
137	nextdisk->pid == 0)
138	break;
139	}
140	while (ret = startdisk(nextdisk, chkit) &&
141	nrun > 0)
142	sleep(10);
143	if (ret)
144	return (ret);
145	}
146	}
147	}
148	if (sumstatus) {
149	if (badlist == 0)
150	return (sumstatus);
151	fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
152	badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
153	for (pt = badlist; pt; pt = pt->next)
154	fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
155	pt->next ? ", " : "\n");
156	return (sumstatus);
157	}
158	(void)endfsent();
159	return (0);
160	}
161
162	struct disk *
163	finddisk(name)
164	char *name;
165	{
166	register struct disk dk, *dkp;
167	register char *p;
168	int len;
169
170	for (p = name + strlen(name) - 1; p >= name; --p)
171	if (isdigit(*p)) {
172	len = p - name + 1;
173	break;
174	}
175	if (p < name)
176	len = strlen(name);
177
178	for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
179	if (strncmp(dk->name, name, len) == 0 &&
180	dk->name[len] == 0)
181	return (dk);
182	}
183	if ((dkp = (struct disk )malloc(sizeof(struct disk))) == NULL) {
184	fprintf(stderr, "out of memory");
185	exit (8);
186	}
187	dk = *dkp;
188	if ((dk->name = malloc((unsigned int)len + 1)) == NULL) {
189	fprintf(stderr, "out of memory");
190	exit (8);
191	}
192	strncpy(dk->name, name, len);
193	dk->name[len] = '\0';
194	dk->part = NULL;
195	dk->next = NULL;
196	dk->pid = 0;
197	ndisks++;
198	return (dk);
199	}
200
201	addpart(name, fsname, auxdata)
202	char name, fsname;
203	long auxdata;
204	{
205	struct disk *dk = finddisk(name);
206	register struct part pt, *ppt = &dk->part;
207
208	for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
209	if (strcmp(pt->name, name) == 0) {
210	printf("%s in fstab more than once!\n", name);
211	return;
212	}
213	if ((ppt = (struct part )malloc(sizeof(struct part))) == NULL) {
214	fprintf(stderr, "out of memory");
215	exit (8);
216	}
217	pt = *ppt;
218	if ((pt->name = malloc((unsigned int)strlen(name) + 1)) == NULL) {
219	fprintf(stderr, "out of memory");
220	exit (8);
221	}
222	strcpy(pt->name, name);
223	if ((pt->fsname = malloc((unsigned int)strlen(fsname) + 1)) == NULL) {
224	fprintf(stderr, "out of memory");
225	exit (8);
226	}
227	strcpy(pt->fsname, fsname);
228	pt->next = NULL;
229	pt->auxdata = auxdata;
230	}
231
232	startdisk(dk, checkit)
233	register struct disk *dk;
234	int (*checkit)();
235	{
236	register struct part *pt = dk->part;
237
238	dk->pid = fork();
239	if (dk->pid < 0) {
240	perror("fork");
241	return (8);
242	}
243	if (dk->pid == 0)
244	exit((*checkit)(pt->name, pt->fsname, pt->auxdata));
245	nrun++;
246	return (0);
247	}
248
249	char *
250	blockcheck(name)
251	char *name;
252	{
253	struct stat stslash, stblock, stchar;
254	char *raw;
255	int retried = 0;
256
257	hotroot = 0;
258	if (stat("/", &stslash) < 0) {
259	perror("/");
260	printf("Can't stat root\n");
261	return (0);
262	}
263	retry:
264	if (stat(name, &stblock) < 0) {
265	perror(name);
266	printf("Can't stat %s\n", name);
267	return (0);
268	}
269	if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
270	if (stslash.st_dev == stblock.st_rdev)
271	hotroot++;
272	raw = rawname(name);
273	if (stat(raw, &stchar) < 0) {
274	perror(raw);
275	printf("Can't stat %s\n", raw);
276	return (name);
277	}
278	if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
279	return (raw);
280	} else {
281	printf("%s is not a character device\n", raw);
282	return (name);
283	}
284	} else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) {
285	name = unrawname(name);
286	retried++;
287	goto retry;
288	}
289	printf("Can't make sense out of name %s\n", name);
290	return (0);
291	}
292
293	char *
294	unrawname(name)
295	char *name;
296	{
297	char *dp;
298	struct stat stb;
299
300	if ((dp = rindex(name, '/')) == 0)
301	return (name);
302	if (stat(name, &stb) < 0)
303	return (name);
304	if ((stb.st_mode & S_IFMT) != S_IFCHR)
305	return (name);
306	if (*(dp + 1) != 'r')
307	return (name);
308	(void)strcpy(dp + 1, dp + 2);
309	return (name);
310	}
311
312	char *
313	rawname(name)
314	char *name;
315	{
316	static char rawbuf[32];
317	char *dp;
318
319	if ((dp = rindex(name, '/')) == 0)
320	return (0);
321	*dp = 0;
322	(void)strcpy(rawbuf, name);
323	*dp = '/';
324	(void)strcat(rawbuf, "/r");
325	(void)strcat(rawbuf, dp + 1);
326	return (rawbuf);
327	}