fsutil.c revision 75936 
1/*	$NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD: head/sbin/fsck/fsutil.c 75936 2001-04-25 07:18:22Z mckusick $
36 */
37
38#include <sys/cdefs.h>
39#ifndef lint
40__RCSID("$NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej Exp $");
41#endif /* not lint */
42
43#include <stdio.h>
44#include <string.h>
45#include <stdlib.h>
46#if __STDC__
47#include <stdarg.h>
48#else
49#include <varargs.h>
50#endif
51#include <errno.h>
52#include <fstab.h>
53#include <err.h>
54#include <paths.h>
55
56#include <sys/param.h>
57#include <sys/stat.h>
58#include <sys/mount.h>
59
60#include "fsutil.h"
61
62static const char *dev = NULL;
63static int hot = 0;
64static int preen = 0;
65
66extern char *__progname;
67
68static void vmsg __P((int, const char *, va_list));
69
70void
71setcdevname(cd, pr)
72	const char *cd;
73	int pr;
74{
75	dev = cd;
76	preen = pr;
77}
78
79const char *
80cdevname()
81{
82	return dev;
83}
84
85int
86hotroot()
87{
88	return hot;
89}
90
91/*VARARGS*/
92void
93#if __STDC__
94errexit(const char *fmt, ...)
95#else
96errexit(va_alist)
97	va_dcl
98#endif
99{
100	va_list ap;
101
102#if __STDC__
103	va_start(ap, fmt);
104#else
105	const char *fmt;
106
107	va_start(ap);
108	fmt = va_arg(ap, const char *);
109#endif
110	(void) vfprintf(stderr, fmt, ap);
111	va_end(ap);
112	exit(8);
113}
114
115static void
116vmsg(fatal, fmt, ap)
117	int fatal;
118	const char *fmt;
119	va_list ap;
120{
121	if (!fatal && preen)
122		(void) printf("%s: ", dev);
123
124	(void) vprintf(fmt, ap);
125
126	if (fatal && preen)
127		(void) printf("\n");
128
129	if (fatal && preen) {
130		(void) printf(
131		    "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
132		    dev, __progname);
133		exit(8);
134	}
135}
136
137/*VARARGS*/
138void
139#if __STDC__
140pfatal(const char *fmt, ...)
141#else
142pfatal(va_alist)
143	va_dcl
144#endif
145{
146	va_list ap;
147
148#if __STDC__
149	va_start(ap, fmt);
150#else
151	const char *fmt;
152
153	va_start(ap);
154	fmt = va_arg(ap, const char *);
155#endif
156	vmsg(1, fmt, ap);
157	va_end(ap);
158}
159
160/*VARARGS*/
161void
162#if __STDC__
163pwarn(const char *fmt, ...)
164#else
165pwarn(va_alist)
166	va_dcl
167#endif
168{
169	va_list ap;
170#if __STDC__
171	va_start(ap, fmt);
172#else
173	const char *fmt;
174
175	va_start(ap);
176	fmt = va_arg(ap, const char *);
177#endif
178	vmsg(0, fmt, ap);
179	va_end(ap);
180}
181
182void
183perror(s)
184	const char *s;
185{
186	pfatal("%s (%s)", s, strerror(errno));
187}
188
189void
190#if __STDC__
191panic(const char *fmt, ...)
192#else
193panic(va_alist)
194	va_dcl
195#endif
196{
197	va_list ap;
198
199#if __STDC__
200	va_start(ap, fmt);
201#else
202	const char *fmt;
203
204	va_start(ap);
205	fmt = va_arg(ap, const char *);
206#endif
207	vmsg(1, fmt, ap);
208	va_end(ap);
209	exit(8);
210}
211
212const char *
213unrawname(name)
214	const char *name;
215{
216	static char unrawbuf[32];
217	const char *dp;
218	struct stat stb;
219
220	if ((dp = strrchr(name, '/')) == 0)
221		return (name);
222	if (stat(name, &stb) < 0)
223		return (name);
224	if (!S_ISCHR(stb.st_mode))
225		return (name);
226	if (dp[1] != 'r')
227		return (name);
228	(void)snprintf(unrawbuf, 32, "%.*s/%s", (int)(dp - name), name, dp + 2);
229	return (unrawbuf);
230}
231
232const char *
233rawname(name)
234	const char *name;
235{
236	static char rawbuf[32];
237	const char *dp;
238
239	if ((dp = strrchr(name, '/')) == 0)
240		return (0);
241	(void)snprintf(rawbuf, 32, "%.*s/r%s", (int)(dp - name), name, dp + 1);
242	return (rawbuf);
243}
244
245const char *
246devcheck(origname)
247	const char *origname;
248{
249	struct stat stslash, stchar;
250
251	if (stat("/", &stslash) < 0) {
252		perror("/");
253		printf("Can't stat root\n");
254		return (origname);
255	}
256	if (stat(origname, &stchar) < 0) {
257		perror(origname);
258		printf("Can't stat %s\n", origname);
259		return (origname);
260	}
261	if (!S_ISCHR(stchar.st_mode)) {
262		perror(origname);
263		printf("%s is not a char device\n", origname);
264	}
265	return (origname);
266}
267
268/*
269 * Get the mount point information for name.
270 */
271struct statfs *
272getmntpt(name)
273	const char *name;
274{
275	struct stat devstat, mntdevstat;
276	char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
277	char *devname;
278	struct statfs *mntbuf, *statfsp;
279	int i, mntsize, isdev;
280
281	if (stat(name, &devstat) != 0)
282		return (NULL);
283	if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
284		isdev = 1;
285	else
286		isdev = 0;
287	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
288	for (i = 0; i < mntsize; i++) {
289		statfsp = &mntbuf[i];
290		devname = statfsp->f_mntfromname;
291		if (*devname != '/') {
292			strcpy(device, _PATH_DEV);
293			strcat(device, devname);
294			strcpy(statfsp->f_mntfromname, device);
295		}
296		if (isdev == 0) {
297			if (strcmp(name, statfsp->f_mntonname))
298				continue;
299			return (statfsp);
300		}
301		if (stat(devname, &mntdevstat) == 0 &&
302		    mntdevstat.st_rdev == devstat.st_rdev)
303			return (statfsp);
304	}
305	statfsp = NULL;
306	return (statfsp);
307}
308
309#if 0
310/*
311 * XXX this code is from NetBSD, but fails in FreeBSD because we
312 * don't have blockdevs. I don't think its needed.
313 */
314const char *
315blockcheck(origname)
316	const char *origname;
317{
318	struct stat stslash, stblock, stchar;
319	const char *newname, *raw;
320	struct fstab *fsp;
321	int retried = 0;
322
323	hot = 0;
324	if (stat("/", &stslash) < 0) {
325		perror("/");
326		printf("Can't stat root\n");
327		return (origname);
328	}
329	newname = origname;
330retry:
331	if (stat(newname, &stblock) < 0) {
332		perror(newname);
333		printf("Can't stat %s\n", newname);
334		return (origname);
335	}
336	if (S_ISBLK(stblock.st_mode)) {
337		if (stslash.st_dev == stblock.st_rdev)
338			hot++;
339		raw = rawname(newname);
340		if (stat(raw, &stchar) < 0) {
341			perror(raw);
342			printf("Can't stat %s\n", raw);
343			return (origname);
344		}
345		if (S_ISCHR(stchar.st_mode)) {
346			return (raw);
347		} else {
348			printf("%s is not a character device\n", raw);
349			return (origname);
350		}
351	} else if (S_ISCHR(stblock.st_mode) && !retried) {
352		newname = unrawname(newname);
353		retried++;
354		goto retry;
355	} else if ((fsp = getfsfile(newname)) != 0 && !retried) {
356		newname = fsp->fs_spec;
357		retried++;
358		goto retry;
359	}
360	/*
361	 * Not a block or character device, just return name and
362	 * let the user decide whether to use it.
363	 */
364	return (origname);
365}
366#endif
367
368
369void *
370emalloc(s)
371	size_t s;
372{
373	void *p;
374
375	p = malloc(s);
376	if (p == NULL)
377		err(1, "malloc failed");
378	return (p);
379}
380
381
382void *
383erealloc(p, s)
384	void *p;
385	size_t s;
386{
387	void *q;
388
389	q = realloc(p, s);
390	if (q == NULL)
391		err(1, "realloc failed");
392	return (q);
393}
394
395
396char *
397estrdup(s)
398	const char *s;
399{
400	char *p;
401
402	p = strdup(s);
403	if (p == NULL)
404		err(1, "strdup failed");
405	return (p);
406}
407