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