1*34c2ea26Sderaadt /* $OpenBSD: fsutil.c,v 1.21 2015/05/29 15:57:36 deraadt Exp $ */ 287304b87Stholo /* $NetBSD: fsutil.c,v 1.2 1996/10/03 20:06:31 christos Exp $ */ 387304b87Stholo 487304b87Stholo /* 587304b87Stholo * Copyright (c) 1990, 1993 687304b87Stholo * The Regents of the University of California. All rights reserved. 787304b87Stholo * 887304b87Stholo * Redistribution and use in source and binary forms, with or without 987304b87Stholo * modification, are permitted provided that the following conditions 1087304b87Stholo * are met: 1187304b87Stholo * 1. Redistributions of source code must retain the above copyright 1287304b87Stholo * notice, this list of conditions and the following disclaimer. 1387304b87Stholo * 2. Redistributions in binary form must reproduce the above copyright 1487304b87Stholo * notice, this list of conditions and the following disclaimer in the 1587304b87Stholo * documentation and/or other materials provided with the distribution. 161ef0d710Smillert * 3. Neither the name of the University nor the names of its contributors 1787304b87Stholo * may be used to endorse or promote products derived from this software 1887304b87Stholo * without specific prior written permission. 1987304b87Stholo * 2087304b87Stholo * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2187304b87Stholo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2287304b87Stholo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2387304b87Stholo * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2487304b87Stholo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2587304b87Stholo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2687304b87Stholo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2787304b87Stholo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2887304b87Stholo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2987304b87Stholo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3087304b87Stholo * SUCH DAMAGE. 3187304b87Stholo */ 3287304b87Stholo 3387304b87Stholo #include <stdio.h> 3487304b87Stholo #include <string.h> 3587304b87Stholo #include <stdlib.h> 3687304b87Stholo #include <stdarg.h> 3787304b87Stholo #include <errno.h> 3887304b87Stholo #include <fstab.h> 39b9fc9a72Sderaadt #include <limits.h> 4087304b87Stholo #include <err.h> 4187304b87Stholo 4287304b87Stholo #include <sys/types.h> 4387304b87Stholo #include <sys/stat.h> 4487304b87Stholo 4587304b87Stholo #include "fsutil.h" 4687304b87Stholo 4787304b87Stholo static const char *dev = NULL; 48e729ad4aSjsing static const char *origdev = NULL; 4987304b87Stholo static int hot = 0; 5087304b87Stholo static int preen = 0; 5187304b87Stholo 5287304b87Stholo extern char *__progname; 5387304b87Stholo 54c72b5b24Smillert static void vmsg(int, const char *, va_list); 5587304b87Stholo 5687304b87Stholo void 57e729ad4aSjsing setcdevname(const char *cd, const char *ocd, int pr) 5887304b87Stholo { 5987304b87Stholo dev = cd; 60e729ad4aSjsing origdev = ocd; 6187304b87Stholo preen = pr; 6287304b87Stholo } 6387304b87Stholo 6487304b87Stholo const char * 65bc52e260Sderaadt cdevname(void) 6687304b87Stholo { 6787304b87Stholo return dev; 6887304b87Stholo } 6987304b87Stholo 7087304b87Stholo int 71bc52e260Sderaadt hotroot(void) 7287304b87Stholo { 7387304b87Stholo return hot; 7487304b87Stholo } 7587304b87Stholo 7687304b87Stholo /*VARARGS*/ 7787304b87Stholo void 7887304b87Stholo errexit(const char *fmt, ...) 7987304b87Stholo { 8087304b87Stholo va_list ap; 8187304b87Stholo 8287304b87Stholo va_start(ap, fmt); 8387304b87Stholo (void) vfprintf(stderr, fmt, ap); 8487304b87Stholo va_end(ap); 8587304b87Stholo exit(8); 8687304b87Stholo } 8787304b87Stholo 8887304b87Stholo static void 89bc52e260Sderaadt vmsg(int fatal, const char *fmt, va_list ap) 9087304b87Stholo { 91e729ad4aSjsing if (!fatal && preen) { 92e729ad4aSjsing if (origdev) 93e729ad4aSjsing printf("%s (%s): ", dev, origdev); 94e729ad4aSjsing else 95e729ad4aSjsing printf("%s: ", dev); 96e729ad4aSjsing } 9787304b87Stholo 9887304b87Stholo (void) vprintf(fmt, ap); 99986047b3Sthib 10087304b87Stholo if (fatal && preen) { 101e729ad4aSjsing printf("\n"); 102e729ad4aSjsing if (origdev) 103e729ad4aSjsing printf("%s (%s): ", dev, origdev); 104e729ad4aSjsing else 105e729ad4aSjsing printf("%s: ", dev); 106e729ad4aSjsing printf("UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 107e729ad4aSjsing __progname); 10887304b87Stholo exit(8); 10987304b87Stholo } 11087304b87Stholo } 11187304b87Stholo 11287304b87Stholo /*VARARGS*/ 11387304b87Stholo void 11487304b87Stholo pfatal(const char *fmt, ...) 11587304b87Stholo { 11687304b87Stholo va_list ap; 11787304b87Stholo 11887304b87Stholo va_start(ap, fmt); 11987304b87Stholo vmsg(1, fmt, ap); 12087304b87Stholo va_end(ap); 12187304b87Stholo } 12287304b87Stholo 12387304b87Stholo /*VARARGS*/ 12487304b87Stholo void 12587304b87Stholo pwarn(const char *fmt, ...) 12687304b87Stholo { 12787304b87Stholo va_list ap; 12887304b87Stholo 12987304b87Stholo va_start(ap, fmt); 13087304b87Stholo vmsg(0, fmt, ap); 13187304b87Stholo va_end(ap); 13287304b87Stholo } 13387304b87Stholo 13487304b87Stholo void 135dd133929Sthib xperror(const char *s) 13687304b87Stholo { 13787304b87Stholo pfatal("%s (%s)", s, strerror(errno)); 13887304b87Stholo } 13987304b87Stholo 14087304b87Stholo void 14187304b87Stholo panic(const char *fmt, ...) 14287304b87Stholo { 14387304b87Stholo va_list ap; 14487304b87Stholo 14587304b87Stholo va_start(ap, fmt); 14687304b87Stholo vmsg(1, fmt, ap); 14787304b87Stholo va_end(ap); 14887304b87Stholo exit(8); 14987304b87Stholo } 15087304b87Stholo 15187304b87Stholo char * 152bc52e260Sderaadt unrawname(char *name) 15387304b87Stholo { 15487304b87Stholo char *dp; 15587304b87Stholo struct stat stb; 15687304b87Stholo 157f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 15887304b87Stholo return (name); 15987304b87Stholo if (stat(name, &stb) < 0) 16087304b87Stholo return (name); 16187304b87Stholo if (!S_ISCHR(stb.st_mode)) 16287304b87Stholo return (name); 16387304b87Stholo if (dp[1] != 'r') 16487304b87Stholo return (name); 16536286464Sderaadt (void)memmove(&dp[1], &dp[2], strlen(&dp[2]) + 1); 16687304b87Stholo return (name); 16787304b87Stholo } 16887304b87Stholo 16987304b87Stholo char * 170bc52e260Sderaadt rawname(char *name) 17187304b87Stholo { 172b9fc9a72Sderaadt static char rawbuf[PATH_MAX]; 17387304b87Stholo char *dp; 17487304b87Stholo 175f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 17687304b87Stholo return (0); 17787304b87Stholo *dp = 0; 178f4be0e98Sderaadt (void)strlcpy(rawbuf, name, sizeof rawbuf); 17987304b87Stholo *dp = '/'; 180f4be0e98Sderaadt (void)strlcat(rawbuf, "/r", sizeof rawbuf); 181f4be0e98Sderaadt (void)strlcat(rawbuf, &dp[1], sizeof rawbuf); 18287304b87Stholo return (rawbuf); 18387304b87Stholo } 18487304b87Stholo 18587304b87Stholo char * 186bc52e260Sderaadt blockcheck(char *origname) 18787304b87Stholo { 18887304b87Stholo struct stat stslash, stblock, stchar; 18987304b87Stholo char *newname, *raw; 19087304b87Stholo struct fstab *fsp; 19187304b87Stholo int retried = 0; 19287304b87Stholo 19387304b87Stholo hot = 0; 19487304b87Stholo if (stat("/", &stslash) < 0) { 195dd133929Sthib xperror("/"); 19687304b87Stholo printf("Can't stat root\n"); 19787304b87Stholo return (origname); 19887304b87Stholo } 19987304b87Stholo newname = origname; 20087304b87Stholo retry: 2017cbafe7eSgrunk if (stat(newname, &stblock) < 0) 20287304b87Stholo return (origname); 2037cbafe7eSgrunk 20487304b87Stholo if (S_ISBLK(stblock.st_mode)) { 20587304b87Stholo if (stslash.st_dev == stblock.st_rdev) 20687304b87Stholo hot++; 20787304b87Stholo raw = rawname(newname); 20887304b87Stholo if (stat(raw, &stchar) < 0) { 209dd133929Sthib xperror(raw); 21087304b87Stholo printf("Can't stat %s\n", raw); 21187304b87Stholo return (origname); 21287304b87Stholo } 21387304b87Stholo if (S_ISCHR(stchar.st_mode)) { 21487304b87Stholo return (raw); 21587304b87Stholo } else { 21687304b87Stholo printf("%s is not a character device\n", raw); 21787304b87Stholo return (origname); 21887304b87Stholo } 21987304b87Stholo } else if (S_ISCHR(stblock.st_mode) && !retried) { 22087304b87Stholo newname = unrawname(newname); 22187304b87Stholo retried++; 22287304b87Stholo goto retry; 22387304b87Stholo } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 22487304b87Stholo newname = fsp->fs_spec; 22587304b87Stholo retried++; 22687304b87Stholo goto retry; 22787304b87Stholo } 22887304b87Stholo /* 22987304b87Stholo * Not a block or character device, just return name and 23087304b87Stholo * let the user decide whether to use it. 23187304b87Stholo */ 23287304b87Stholo return (origname); 23387304b87Stholo } 23487304b87Stholo 23587304b87Stholo 23687304b87Stholo void * 237bc52e260Sderaadt emalloc(size_t s) 23887304b87Stholo { 239b166fb0eSderaadt void *p; 240b166fb0eSderaadt 241b166fb0eSderaadt if (s == 0) 242b166fb0eSderaadt err(1, "malloc failed"); 243b166fb0eSderaadt p = malloc(s); 24487304b87Stholo if (p == NULL) 24587304b87Stholo err(1, "malloc failed"); 24687304b87Stholo return p; 24787304b87Stholo } 24887304b87Stholo 24987304b87Stholo 25087304b87Stholo void * 251119ae1adSderaadt ereallocarray(void *p, size_t n, size_t s) 25287304b87Stholo { 2537428f312Sderaadt void *newp; 2547428f312Sderaadt 255*34c2ea26Sderaadt if (n == 0 || s == 0) { 256*34c2ea26Sderaadt free(p); 257b166fb0eSderaadt err(1, "realloc failed"); 258*34c2ea26Sderaadt } 259119ae1adSderaadt newp = reallocarray(p, n, s); 2607428f312Sderaadt if (newp == NULL) { 2617428f312Sderaadt free(p); 26287304b87Stholo err(1, "realloc failed"); 2637428f312Sderaadt } 2647428f312Sderaadt return newp; 26587304b87Stholo } 26687304b87Stholo 26787304b87Stholo 26887304b87Stholo char * 269bc52e260Sderaadt estrdup(const char *s) 27087304b87Stholo { 27187304b87Stholo char *p = strdup(s); 27287304b87Stholo if (p == NULL) 27387304b87Stholo err(1, "strdup failed"); 27487304b87Stholo return p; 27587304b87Stholo } 276