fsutil.c revision 330897 
1/*	$NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 1990, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35#ifndef lint
36__RCSID("$NetBSD: fsutil.c,v 1.15 2006/06/05 16:52:05 christos Exp $");
37#endif /* not lint */
38__FBSDID("$FreeBSD: stable/11/sbin/fsck/fsutil.c 330897 2018-03-14 03:19:51Z eadler $");
39
40#include <sys/param.h>
41#include <sys/stat.h>
42#include <sys/mount.h>
43
44#include <err.h>
45#include <errno.h>
46#include <fstab.h>
47#include <paths.h>
48#include <stdarg.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52
53#include "fsutil.h"
54
55static const char *dev = NULL;
56static int preen = 0;
57
58static void vmsg(int, const char *, va_list) __printflike(2, 0);
59
60void
61setcdevname(const char *cd, int pr)
62{
63	dev = cd;
64	preen = pr;
65}
66
67const char *
68cdevname(void)
69{
70	return dev;
71}
72
73static void
74vmsg(int fatal, const char *fmt, va_list ap)
75{
76	if (!fatal && preen)
77		(void) printf("%s: ", dev);
78
79	(void) vprintf(fmt, ap);
80
81	if (fatal && preen)
82		(void) printf("\n");
83
84	if (fatal && preen) {
85		(void) printf(
86		    "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
87		    dev, getprogname());
88		exit(8);
89	}
90}
91
92/*VARARGS*/
93void
94pfatal(const char *fmt, ...)
95{
96	va_list ap;
97
98	va_start(ap, fmt);
99	vmsg(1, fmt, ap);
100	va_end(ap);
101}
102
103/*VARARGS*/
104void
105pwarn(const char *fmt, ...)
106{
107	va_list ap;
108
109	va_start(ap, fmt);
110	vmsg(0, fmt, ap);
111	va_end(ap);
112}
113
114void
115perr(const char *fmt, ...)
116{
117	va_list ap;
118
119	va_start(ap, fmt);
120	vmsg(1, fmt, ap);
121	va_end(ap);
122}
123
124void
125panic(const char *fmt, ...)
126{
127	va_list ap;
128
129	va_start(ap, fmt);
130	vmsg(1, fmt, ap);
131	va_end(ap);
132	exit(8);
133}
134
135const char *
136devcheck(const char *origname)
137{
138	struct stat stslash, stchar;
139
140	if (stat("/", &stslash) < 0) {
141		perr("Can't stat `/'");
142		return (origname);
143	}
144	if (stat(origname, &stchar) < 0) {
145		perr("Can't stat %s\n", origname);
146		return (origname);
147	}
148	if (!S_ISCHR(stchar.st_mode)) {
149		perr("%s is not a char device\n", origname);
150	}
151	return (origname);
152}
153
154/*
155 * Get the mount point information for name.
156 */
157struct statfs *
158getmntpt(const char *name)
159{
160	struct stat devstat, mntdevstat;
161	char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
162	char *dev_name;
163	struct statfs *mntbuf, *statfsp;
164	int i, mntsize, isdev;
165
166	if (stat(name, &devstat) != 0)
167		return (NULL);
168	if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
169		isdev = 1;
170	else
171		isdev = 0;
172	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
173	for (i = 0; i < mntsize; i++) {
174		statfsp = &mntbuf[i];
175		dev_name = statfsp->f_mntfromname;
176		if (*dev_name != '/') {
177			strcpy(device, _PATH_DEV);
178			strcat(device, dev_name);
179			strcpy(statfsp->f_mntfromname, device);
180		}
181		if (isdev == 0) {
182			if (strcmp(name, statfsp->f_mntonname))
183				continue;
184			return (statfsp);
185		}
186		if (stat(dev_name, &mntdevstat) == 0 &&
187		    mntdevstat.st_rdev == devstat.st_rdev)
188			return (statfsp);
189	}
190	statfsp = NULL;
191	return (statfsp);
192}
193
194
195void *
196emalloc(size_t s)
197{
198	void *p;
199
200	p = malloc(s);
201	if (p == NULL)
202		err(1, "malloc failed");
203	return (p);
204}
205
206
207void *
208erealloc(void *p, size_t s)
209{
210	void *q;
211
212	q = realloc(p, s);
213	if (q == NULL)
214		err(1, "realloc failed");
215	return (q);
216}
217
218
219char *
220estrdup(const char *s)
221{
222	char *p;
223
224	p = strdup(s);
225	if (p == NULL)
226		err(1, "strdup failed");
227	return (p);
228}
229