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 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __RCSID("$NetBSD: fsutil.c,v 1.7 1998/07/30 17:41:03 thorpej Exp $"); 39 #endif /* not lint */ 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 #include <sys/mount.h> 45 46 #include <err.h> 47 #include <errno.h> 48 #include <fstab.h> 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 63 setcdevname(const char *cd, int pr) 64 { 65 dev = cd; 66 preen = pr; 67 } 68 69 const char * 70 cdevname(void) 71 { 72 return dev; 73 } 74 75 static void 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 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 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 117 perror(const char *s) 118 { 119 pfatal("%s (%s)", s, strerror(errno)); 120 } 121 122 void 123 panic(const char *fmt, ...) 124 { 125 va_list ap; 126 127 va_start(ap, fmt); 128 vmsg(1, fmt, ap); 129 va_end(ap); 130 exit(8); 131 } 132 133 const char * 134 devcheck(const char *origname) 135 { 136 struct stat stslash, stchar; 137 138 if (stat("/", &stslash) < 0) { 139 perror("/"); 140 printf("Can't stat root\n"); 141 return (origname); 142 } 143 if (stat(origname, &stchar) < 0) { 144 perror(origname); 145 printf("Can't stat %s\n", origname); 146 return (origname); 147 } 148 if (!S_ISCHR(stchar.st_mode)) { 149 perror(origname); 150 printf("%s is not a char device\n", origname); 151 } 152 return (origname); 153 } 154 155 /* 156 * Get the mount point information for name. 157 */ 158 struct statfs * 159 getmntpt(const char *name) 160 { 161 struct stat devstat, mntdevstat; 162 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 163 char *devname; 164 struct statfs *mntbuf, *statfsp; 165 int i, mntsize, isdev; 166 167 if (stat(name, &devstat) != 0) 168 return (NULL); 169 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 170 isdev = 1; 171 else 172 isdev = 0; 173 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 174 for (i = 0; i < mntsize; i++) { 175 statfsp = &mntbuf[i]; 176 devname = statfsp->f_mntfromname; 177 if (*devname != '/') { 178 strcpy(device, _PATH_DEV); 179 strcat(device, devname); 180 strcpy(statfsp->f_mntfromname, device); 181 } 182 if (isdev == 0) { 183 if (strcmp(name, statfsp->f_mntonname)) 184 continue; 185 return (statfsp); 186 } 187 if (stat(devname, &mntdevstat) == 0 && 188 mntdevstat.st_rdev == devstat.st_rdev) 189 return (statfsp); 190 } 191 statfsp = NULL; 192 return (statfsp); 193 } 194 195 196 void * 197 emalloc(size_t s) 198 { 199 void *p; 200 201 p = malloc(s); 202 if (p == NULL) 203 err(1, "malloc failed"); 204 return (p); 205 } 206 207 208 void * 209 erealloc(void *p, size_t s) 210 { 211 void *q; 212 213 q = realloc(p, s); 214 if (q == NULL) 215 err(1, "realloc failed"); 216 return (q); 217 } 218 219 220 char * 221 estrdup(const char *s) 222 { 223 char *p; 224 225 p = strdup(s); 226 if (p == NULL) 227 err(1, "strdup failed"); 228 return (p); 229 } 230