1 /* $NetBSD: fsutil.c,v 1.11 2001/11/09 07:50:19 lukem 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 1.11 2001/11/09 07:50:19 lukem Exp $"); 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 43 #include <stdio.h> 44 #include <string.h> 45 #include <stdlib.h> 46 #include <stdarg.h> 47 #include <errno.h> 48 #include <fstab.h> 49 #include <err.h> 50 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 54 #include "fsutil.h" 55 56 static const char *dev = NULL; 57 static int hot = 0; 58 static int preen = 0; 59 60 static void vmsg(int, const char *, va_list) 61 __attribute((__format__(__printf__,2,0))); 62 63 void 64 setcdevname(const char *cd, int pr) 65 { 66 67 dev = cd; 68 preen = pr; 69 } 70 71 const char * 72 cdevname(void) 73 { 74 75 return dev; 76 } 77 78 int 79 hotroot(void) 80 { 81 82 return hot; 83 } 84 85 /*VARARGS*/ 86 void 87 errexit(const char *fmt, ...) 88 { 89 va_list ap; 90 91 va_start(ap, fmt); 92 (void) vfprintf(stderr, fmt, ap); 93 va_end(ap); 94 exit(8); 95 } 96 97 static void 98 vmsg(int fatal, const char *fmt, va_list ap) 99 { 100 101 if (!fatal && preen) 102 (void) printf("%s: ", dev); 103 104 (void) vprintf(fmt, ap); 105 106 if (fatal && preen) 107 (void) printf("\n"); 108 109 if (fatal && preen) { 110 (void) printf( 111 "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 112 dev, getprogname()); 113 exit(8); 114 } 115 } 116 117 /*VARARGS*/ 118 void 119 pfatal(const char *fmt, ...) 120 { 121 va_list ap; 122 123 va_start(ap, fmt); 124 vmsg(1, fmt, ap); 125 va_end(ap); 126 } 127 128 /*VARARGS*/ 129 void 130 pwarn(const char *fmt, ...) 131 { 132 va_list ap; 133 134 va_start(ap, fmt); 135 vmsg(0, fmt, ap); 136 va_end(ap); 137 } 138 139 void 140 perror(const char *s) 141 { 142 143 pfatal("%s (%s)", s, strerror(errno)); 144 } 145 146 void 147 panic(const char *fmt, ...) 148 { 149 va_list ap; 150 151 va_start(ap, fmt); 152 vmsg(1, fmt, ap); 153 va_end(ap); 154 exit(8); 155 } 156 157 const char * 158 unrawname(const char *name) 159 { 160 static char unrawbuf[MAXPATHLEN]; 161 const char *dp; 162 struct stat stb; 163 164 if ((dp = strrchr(name, '/')) == 0) 165 return (name); 166 if (stat(name, &stb) < 0) 167 return (name); 168 if (!S_ISCHR(stb.st_mode)) 169 return (name); 170 if (dp[1] != 'r') 171 return (name); 172 (void)snprintf(unrawbuf, sizeof(unrawbuf), "%.*s/%s", 173 (int)(dp - name), name, dp + 2); 174 return (unrawbuf); 175 } 176 177 const char * 178 rawname(const char *name) 179 { 180 static char rawbuf[MAXPATHLEN]; 181 const char *dp; 182 183 if ((dp = strrchr(name, '/')) == 0) 184 return (0); 185 (void)snprintf(rawbuf, sizeof(rawbuf), "%.*s/r%s", 186 (int)(dp - name), name, dp + 1); 187 return (rawbuf); 188 } 189 190 const char * 191 blockcheck(const char *origname) 192 { 193 struct stat stslash, stblock, stchar; 194 const char *newname, *raw; 195 struct fstab *fsp; 196 int retried = 0; 197 198 hot = 0; 199 if (stat("/", &stslash) < 0) { 200 perror("/"); 201 printf("Can't stat root\n"); 202 return (origname); 203 } 204 newname = origname; 205 retry: 206 if (stat(newname, &stblock) < 0) { 207 perror(newname); 208 printf("Can't stat %s\n", newname); 209 return (origname); 210 } 211 if (S_ISBLK(stblock.st_mode)) { 212 if (stslash.st_dev == stblock.st_rdev) 213 hot++; 214 raw = rawname(newname); 215 if (stat(raw, &stchar) < 0) { 216 perror(raw); 217 printf("Can't stat %s\n", raw); 218 return (origname); 219 } 220 if (S_ISCHR(stchar.st_mode)) { 221 return (raw); 222 } else { 223 printf("%s is not a character device\n", raw); 224 return (origname); 225 } 226 } else if (S_ISCHR(stblock.st_mode) && !retried) { 227 newname = unrawname(newname); 228 retried++; 229 goto retry; 230 } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 231 newname = fsp->fs_spec; 232 retried++; 233 goto retry; 234 } 235 /* 236 * Not a block or character device, just return name and 237 * let the user decide whether to use it. 238 */ 239 return (origname); 240 } 241 242 243 void * 244 emalloc(size_t s) 245 { 246 void *p; 247 248 p = malloc(s); 249 if (p == NULL) 250 err(1, "malloc failed"); 251 return (p); 252 } 253 254 255 void * 256 erealloc(void *p, size_t s) 257 { 258 void *q; 259 260 q = realloc(p, s); 261 if (q == NULL) 262 err(1, "realloc failed"); 263 return (q); 264 } 265 266 267 char * 268 estrdup(const char *s) 269 { 270 char *p; 271 272 p = strdup(s); 273 if (p == NULL) 274 err(1, "strdup failed"); 275 return (p); 276 } 277