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

/*
 * Copyright (c) 1990 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)preen.c	5.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fstab.h>
#include <strings.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	*
	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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*/
	17
	18	#ifndef lint
5f229d0b	19	static char sccsid[] = "@(#)preen.c 5.2 (Berkeley) %G%";
5211717f KM	20	#endif /* not lint */
	21
	22	#include <sys/param.h>
	23	#include <sys/stat.h>
	24	#include <sys/wait.h>
	25	#include <fstab.h>
	26	#include <strings.h>
	27	#include <stdio.h>
	28	#include <ctype.h>
	29
	30	char rawname(), unrawname(), blockcheck(), malloc();
	31
	32	struct part {
	33	struct part next; / forward link of partitions on disk */
	34	char name; / device name */
	35	char fsname; / mounted filesystem name */
	36	long auxdata; /* auxillary data for application */
	37	} badlist, *badnext = &badlist;
	38
	39	struct disk {
	40	char name; / disk base name */
	41	struct disk next; / forward link for list of disks */
	42	struct part part; / head of list of partitions on disk */
	43	int pid; /* If != 0, pid of proc working on */
	44	} *disks;
	45
5f229d0b KM	46	int nrun, ndisks;
5f229d0b KM	47	char hotroot;
5211717f KM	48
	49	checkfstab(preen, maxrun, docheck, chkit)
	50	int preen, maxrun;
	51	int (docheck)(), (chkit)();
	52	{
	53	register struct fstab *fsp;
	54	register struct disk dk, nextdisk;
	55	register struct part *pt;
	56	int ret, pid, retcode, passno, sumstatus, status;
	57	long auxdata;
	58	char *name;
	59
	60	sumstatus = 0;
	61	for (passno = 1; passno <= 2; passno++) {
	62	if (setfsent() == 0) {
	63	fprintf(stderr, "Can't open checklist file: %s\n",
	64	_PATH_FSTAB);
	65	return (8);
	66	}
	67	while ((fsp = getfsent()) != 0) {
	68	if ((auxdata = (*docheck)(fsp)) == 0)
	69	continue;
	70	if (preen == 0 \|\| passno == 1 && fsp->fs_passno == 1) {
	71	if (name = blockcheck(fsp->fs_spec)) {
	72	if (sumstatus = (*chkit)(name,
	73	fsp->fs_file, auxdata))
	74	return (sumstatus);
	75	} else if (preen)
	76	return (8);
	77	} else if (passno == 2 && fsp->fs_passno > 1) {
	78	if ((name = blockcheck(fsp->fs_spec)) == NULL) {
	79	fprintf(stderr, "BAD DISK NAME %s\n",
	80	fsp->fs_spec);
	81	sumstatus \|= 8;
	82	continue;
	83	}
	84	addpart(name, fsp->fs_file, auxdata);
	85	}
	86	}
	87	if (preen == 0)
	88	return (0);
	89	}
	90	if (preen) {
	91	if (maxrun == 0)
	92	maxrun = ndisks;
	93	if (maxrun > ndisks)
	94	maxrun = ndisks;
	95	nextdisk = disks;
	96	for (passno = 0; passno < maxrun; ++passno) {
	97	while (ret = startdisk(nextdisk, chkit) && nrun > 0)
	98	sleep(10);
	99	if (ret)
	100	return (ret);
	101	nextdisk = nextdisk->next;
	102	}
	103	while ((pid = wait(&status)) != -1) {
	104	for (dk = disks; dk; dk = dk->next)
	105	if (dk->pid == pid)
	106	break;
	107	if (dk == 0) {
	108	printf("Unknown pid %d\n", pid);
	109	continue;
	110	}
	111	if (WIFEXITED(status))
112	retcode = WEXITSTATUS(status);
113	else
114	retcode = 0;
115	if (WIFSIGNALED(status)) {
116	printf("%s (%s): EXITED WITH SIGNAL %d\n",
117	dk->part->name, dk->part->fsname,
118	WTERMSIG(status));
119	retcode = 8;
120	}
121	if (retcode != 0) {
122	sumstatus \|= retcode;
123	*badnext = dk->part;
124	badnext = &dk->part->next;
125	dk->part = dk->part->next;
126	*badnext = NULL;
127	} else
128	dk->part = dk->part->next;
129	dk->pid = 0;
130	nrun--;
131	if (dk->part == NULL)
132	ndisks--;
133
134	if (nextdisk == NULL) {
135	if (dk->part) {
136	while (ret = startdisk(dk, chkit) &&
137	nrun > 0)
138	sleep(10);
139	if (ret)
140	return (ret);
141	}
142	} else if (nrun < maxrun && nrun < ndisks) {
143	for ( ;; ) {
144	if ((nextdisk = nextdisk->next) == NULL)
145	nextdisk = disks;
146	if (nextdisk->part != NULL &&
147	nextdisk->pid == 0)
148	break;
149	}
150	while (ret = startdisk(nextdisk, chkit) &&
151	nrun > 0)
152	sleep(10);
153	if (ret)
154	return (ret);
155	}
156	}
157	}
158	if (sumstatus) {
159	if (badlist == 0)
160	return (sumstatus);
161	fprintf(stderr, "THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
162	badlist->next ? "S" : "", "UNEXPECTED INCONSISTENCY:");
163	for (pt = badlist; pt; pt = pt->next)
164	fprintf(stderr, "%s (%s)%s", pt->name, pt->fsname,
165	pt->next ? ", " : "\n");
166	return (sumstatus);
167	}
168	(void)endfsent();
169	return (0);
170	}
171
172	struct disk *
173	finddisk(name)
174	char *name;
175	{
176	register struct disk dk, *dkp;
177	register char *p;
178	int len;
179
180	for (p = name + strlen(name) - 1; p >= name; --p)
181	if (isdigit(*p)) {
182	len = p - name + 1;
183	break;
184	}
185	if (p < name)
186	len = strlen(name);
187
188	for (dk = disks, dkp = &disks; dk; dkp = &dk->next, dk = dk->next) {
189	if (strncmp(dk->name, name, len) == 0 &&
190	dk->name[len] == 0)
191	return (dk);
192	}
193	if ((dkp = (struct disk )malloc(sizeof(struct disk))) == NULL) {
194	fprintf(stderr, "out of memory");
195	exit (8);
196	}
197	dk = *dkp;
198	if ((dk->name = malloc((unsigned int)len + 1)) == NULL) {
199	fprintf(stderr, "out of memory");
200	exit (8);
201	}
202	strncpy(dk->name, name, len);
203	dk->name[len] = '\0';
204	dk->part = NULL;
205	dk->next = NULL;
206	dk->pid = 0;
207	ndisks++;
208	return (dk);
209	}
210
211	addpart(name, fsname, auxdata)
212	char name, fsname;
213	long auxdata;
214	{
215	struct disk *dk = finddisk(name);
216	register struct part pt, *ppt = &dk->part;
217
218	for (pt = dk->part; pt; ppt = &pt->next, pt = pt->next)
219	if (strcmp(pt->name, name) == 0) {
220	printf("%s in fstab more than once!\n", name);
221	return;
222	}
223	if ((ppt = (struct part )malloc(sizeof(struct part))) == NULL) {
224	fprintf(stderr, "out of memory");
225	exit (8);
226	}
227	pt = *ppt;
228	if ((pt->name = malloc((unsigned int)strlen(name) + 1)) == NULL) {
229	fprintf(stderr, "out of memory");
230	exit (8);
231	}
232	strcpy(pt->name, name);
233	if ((pt->fsname = malloc((unsigned int)strlen(fsname) + 1)) == NULL) {
234	fprintf(stderr, "out of memory");
235	exit (8);
236	}
237	strcpy(pt->fsname, fsname);
238	pt->next = NULL;
239	pt->auxdata = auxdata;
240	}
241
242	startdisk(dk, checkit)
243	register struct disk *dk;
244	int (*checkit)();
245	{
246	register struct part *pt = dk->part;
247
248	dk->pid = fork();
249	if (dk->pid < 0) {
250	perror("fork");
251	return (8);
252	}
253	if (dk->pid == 0)
254	exit((*checkit)(pt->name, pt->fsname, pt->auxdata));
255	nrun++;
256	return (0);
257	}
258
259	char *
260	blockcheck(name)
261	char *name;
262	{
263	struct stat stslash, stblock, stchar;
264	char *raw;
265	int retried = 0;
266
267	hotroot = 0;
268	if (stat("/", &stslash) < 0) {
269	perror("/");
270	printf("Can't stat root\n");
271	return (0);
272	}
273	retry:
274	if (stat(name, &stblock) < 0) {
275	perror(name);
276	printf("Can't stat %s\n", name);
277	return (0);
278	}
279	if ((stblock.st_mode & S_IFMT) == S_IFBLK) {
280	if (stslash.st_dev == stblock.st_rdev)
281	hotroot++;
282	raw = rawname(name);
283	if (stat(raw, &stchar) < 0) {
284	perror(raw);
285	printf("Can't stat %s\n", raw);
286	return (name);
287	}
288	if ((stchar.st_mode & S_IFMT) == S_IFCHR) {
289	return (raw);
290	} else {
291	printf("%s is not a character device\n", raw);
292	return (name);
293	}
294	} else if ((stblock.st_mode & S_IFMT) == S_IFCHR && !retried) {
295	name = unrawname(name);
296	retried++;
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(name)
305	char *name;
306	{
307	char *dp;
308	struct stat stb;
309
310	if ((dp = rindex(name, '/')) == 0)
311	return (name);
312	if (stat(name, &stb) < 0)
313	return (name);
314	if ((stb.st_mode & S_IFMT) != S_IFCHR)
315	return (name);
316	if (*(dp + 1) != 'r')
317	return (name);
318	(void)strcpy(dp + 1, dp + 2);
319	return (name);
320	}
321
322	char *
323	rawname(name)
324	char *name;
325	{
326	static char rawbuf[32];
327	char *dp;
328
329	if ((dp = rindex(name, '/')) == 0)
330	return (0);
331	*dp = 0;
332	(void)strcpy(rawbuf, name);
333	*dp = '/';
334	(void)strcat(rawbuf, "/r");
335	(void)strcat(rawbuf, dp + 1);
336	return (rawbuf);
337	}