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$");
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 #ifndef __ANDROID__
47 #include <fstab.h>
48 #endif
49 #include <paths.h>
50 #include <stdarg.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54
55 #include "fsutil.h"
56
57 static const char *dev = NULL;
58 static int preen = 0;
59
60 static void vmsg(int, const char *, va_list) __printflike(2, 0);
61
62 void
setcdevname(const char * cd,int pr)63 setcdevname(const char *cd, int pr)
64 {
65 dev = cd;
66 preen = pr;
67 }
68
69 const char *
cdevname(void)70 cdevname(void)
71 {
72 return dev;
73 }
74
75 static void
vmsg(int fatal,const char * fmt,va_list ap)76 vmsg(int fatal, const char *fmt, va_list ap)
77 {
78 if (!fatal && preen)
79 (void) printf("%s: ", dev);
80
81 (void) vprintf(fmt, ap);
82
83 if (fatal && preen)
84 (void) printf("\n");
85
86 if (fatal && preen) {
87 (void) printf(
88 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n",
89 dev, getprogname());
90 exit(8);
91 }
92 }
93
94 /*VARARGS*/
95 void
pfatal(const char * fmt,...)96 pfatal(const char *fmt, ...)
97 {
98 va_list ap;
99
100 va_start(ap, fmt);
101 vmsg(1, fmt, ap);
102 va_end(ap);
103 }
104
105 /*VARARGS*/
106 void
pwarn(const char * fmt,...)107 pwarn(const char *fmt, ...)
108 {
109 va_list ap;
110
111 va_start(ap, fmt);
112 vmsg(0, fmt, ap);
113 va_end(ap);
114 }
115
116 void
perr(const char * fmt,...)117 perr(const char *fmt, ...)
118 {
119 va_list ap;
120
121 va_start(ap, fmt);
122 vmsg(1, fmt, ap);
123 va_end(ap);
124 }
125
126 void
panic(const char * fmt,...)127 panic(const char *fmt, ...)
128 {
129 va_list ap;
130
131 va_start(ap, fmt);
132 vmsg(1, fmt, ap);
133 va_end(ap);
134 exit(8);
135 }
136
137 const char *
devcheck(const char * origname)138 devcheck(const char *origname)
139 {
140 struct stat stslash, stchar;
141
142 if (stat("/", &stslash) < 0) {
143 perr("Can't stat `/'");
144 return (origname);
145 }
146 if (stat(origname, &stchar) < 0) {
147 perr("Can't stat %s\n", origname);
148 return (origname);
149 }
150 if (!S_ISCHR(stchar.st_mode)) {
151 perr("%s is not a char device\n", origname);
152 }
153 return (origname);
154 }
155
156 #ifndef __ANDROID__
157 /*
158 * Get the mount point information for name.
159 */
160 struct statfs *
getmntpt(const char * name)161 getmntpt(const char *name)
162 {
163 struct stat devstat, mntdevstat;
164 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
165 char *dev_name;
166 struct statfs *mntbuf, *statfsp;
167 int i, mntsize, isdev;
168
169 if (stat(name, &devstat) != 0)
170 return (NULL);
171 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
172 isdev = 1;
173 else
174 isdev = 0;
175 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
176 for (i = 0; i < mntsize; i++) {
177 statfsp = &mntbuf[i];
178 dev_name = statfsp->f_mntfromname;
179 if (*dev_name != '/') {
180 if (strlen(_PATH_DEV) + strlen(dev_name) + 1 >
181 sizeof(statfsp->f_mntfromname))
182 continue;
183 strcpy(device, _PATH_DEV);
184 strcat(device, dev_name);
185 strcpy(statfsp->f_mntfromname, device);
186 }
187 if (isdev == 0) {
188 if (strcmp(name, statfsp->f_mntonname))
189 continue;
190 return (statfsp);
191 }
192 if (stat(dev_name, &mntdevstat) == 0 &&
193 mntdevstat.st_rdev == devstat.st_rdev)
194 return (statfsp);
195 }
196 statfsp = NULL;
197 return (statfsp);
198 }
199 #endif
200
201 void *
emalloc(size_t s)202 emalloc(size_t s)
203 {
204 void *p;
205
206 p = malloc(s);
207 if (p == NULL)
208 err(1, "malloc failed");
209 return (p);
210 }
211
212
213 void *
erealloc(void * p,size_t s)214 erealloc(void *p, size_t s)
215 {
216 void *q;
217
218 q = realloc(p, s);
219 if (q == NULL)
220 err(1, "realloc failed");
221 return (q);
222 }
223
224
225 char *
estrdup(const char * s)226 estrdup(const char *s)
227 {
228 char *p;
229
230 p = strdup(s);
231 if (p == NULL)
232 err(1, "strdup failed");
233 return (p);
234 }
235