1*c9112980Sderaadt /* $OpenBSD: fsutil.c,v 1.23 2018/09/24 21:26:00 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 56*c9112980Sderaadt struct stat stslash; 57*c9112980Sderaadt 58*c9112980Sderaadt void 59*c9112980Sderaadt checkroot(void) 60*c9112980Sderaadt { 61*c9112980Sderaadt if (stat("/", &stslash) < 0) { 62*c9112980Sderaadt xperror("/"); 63*c9112980Sderaadt printf("Can't stat root\n"); 64*c9112980Sderaadt } 65*c9112980Sderaadt } 66*c9112980Sderaadt 6787304b87Stholo void 68e729ad4aSjsing setcdevname(const char *cd, const char *ocd, int pr) 6987304b87Stholo { 7087304b87Stholo dev = cd; 71e729ad4aSjsing origdev = ocd; 7287304b87Stholo preen = pr; 7387304b87Stholo } 7487304b87Stholo 7587304b87Stholo const char * 76bc52e260Sderaadt cdevname(void) 7787304b87Stholo { 7887304b87Stholo return dev; 7987304b87Stholo } 8087304b87Stholo 8187304b87Stholo int 82bc52e260Sderaadt hotroot(void) 8387304b87Stholo { 8487304b87Stholo return hot; 8587304b87Stholo } 8687304b87Stholo 8787304b87Stholo void 8887304b87Stholo errexit(const char *fmt, ...) 8987304b87Stholo { 9087304b87Stholo va_list ap; 9187304b87Stholo 9287304b87Stholo va_start(ap, fmt); 9387304b87Stholo (void) vfprintf(stderr, fmt, ap); 9487304b87Stholo va_end(ap); 9587304b87Stholo exit(8); 9687304b87Stholo } 9787304b87Stholo 9887304b87Stholo static void 99bc52e260Sderaadt vmsg(int fatal, const char *fmt, va_list ap) 10087304b87Stholo { 101e729ad4aSjsing if (!fatal && preen) { 102e729ad4aSjsing if (origdev) 103e729ad4aSjsing printf("%s (%s): ", dev, origdev); 104e729ad4aSjsing else 105e729ad4aSjsing printf("%s: ", dev); 106e729ad4aSjsing } 10787304b87Stholo 10887304b87Stholo (void) vprintf(fmt, ap); 109986047b3Sthib 11087304b87Stholo if (fatal && preen) { 111e729ad4aSjsing printf("\n"); 112e729ad4aSjsing if (origdev) 113e729ad4aSjsing printf("%s (%s): ", dev, origdev); 114e729ad4aSjsing else 115e729ad4aSjsing printf("%s: ", dev); 116e729ad4aSjsing printf("UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 117e729ad4aSjsing __progname); 11887304b87Stholo exit(8); 11987304b87Stholo } 12087304b87Stholo } 12187304b87Stholo 12287304b87Stholo void 12387304b87Stholo pfatal(const char *fmt, ...) 12487304b87Stholo { 12587304b87Stholo va_list ap; 12687304b87Stholo 12787304b87Stholo va_start(ap, fmt); 12887304b87Stholo vmsg(1, fmt, ap); 12987304b87Stholo va_end(ap); 13087304b87Stholo } 13187304b87Stholo 13287304b87Stholo void 13387304b87Stholo pwarn(const char *fmt, ...) 13487304b87Stholo { 13587304b87Stholo va_list ap; 13687304b87Stholo 13787304b87Stholo va_start(ap, fmt); 13887304b87Stholo vmsg(0, fmt, ap); 13987304b87Stholo va_end(ap); 14087304b87Stholo } 14187304b87Stholo 14287304b87Stholo void 143dd133929Sthib xperror(const char *s) 14487304b87Stholo { 14587304b87Stholo pfatal("%s (%s)", s, strerror(errno)); 14687304b87Stholo } 14787304b87Stholo 14887304b87Stholo void 14987304b87Stholo panic(const char *fmt, ...) 15087304b87Stholo { 15187304b87Stholo va_list ap; 15287304b87Stholo 15387304b87Stholo va_start(ap, fmt); 15487304b87Stholo vmsg(1, fmt, ap); 15587304b87Stholo va_end(ap); 15687304b87Stholo exit(8); 15787304b87Stholo } 15887304b87Stholo 15987304b87Stholo char * 160bc52e260Sderaadt unrawname(char *name) 16187304b87Stholo { 16287304b87Stholo char *dp; 16387304b87Stholo struct stat stb; 16487304b87Stholo 165f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 16687304b87Stholo return (name); 16787304b87Stholo if (stat(name, &stb) < 0) 16887304b87Stholo return (name); 16987304b87Stholo if (!S_ISCHR(stb.st_mode)) 17087304b87Stholo return (name); 17187304b87Stholo if (dp[1] != 'r') 17287304b87Stholo return (name); 17336286464Sderaadt (void)memmove(&dp[1], &dp[2], strlen(&dp[2]) + 1); 17487304b87Stholo return (name); 17587304b87Stholo } 17687304b87Stholo 17787304b87Stholo char * 178bc52e260Sderaadt rawname(char *name) 17987304b87Stholo { 180b9fc9a72Sderaadt static char rawbuf[PATH_MAX]; 18187304b87Stholo char *dp; 18287304b87Stholo 183f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 18487304b87Stholo return (0); 18587304b87Stholo *dp = 0; 186f4be0e98Sderaadt (void)strlcpy(rawbuf, name, sizeof rawbuf); 18787304b87Stholo *dp = '/'; 188f4be0e98Sderaadt (void)strlcat(rawbuf, "/r", sizeof rawbuf); 189f4be0e98Sderaadt (void)strlcat(rawbuf, &dp[1], sizeof rawbuf); 19087304b87Stholo return (rawbuf); 19187304b87Stholo } 19287304b87Stholo 19387304b87Stholo char * 194bc52e260Sderaadt blockcheck(char *origname) 19587304b87Stholo { 196*c9112980Sderaadt struct stat stblock, stchar; 19787304b87Stholo char *newname, *raw; 19887304b87Stholo struct fstab *fsp; 19987304b87Stholo int retried = 0; 20087304b87Stholo 20187304b87Stholo hot = 0; 20287304b87Stholo newname = origname; 20387304b87Stholo retry: 2047cbafe7eSgrunk if (stat(newname, &stblock) < 0) 20587304b87Stholo return (origname); 2067cbafe7eSgrunk 20787304b87Stholo if (S_ISBLK(stblock.st_mode)) { 20887304b87Stholo if (stslash.st_dev == stblock.st_rdev) 20987304b87Stholo hot++; 21087304b87Stholo raw = rawname(newname); 21187304b87Stholo if (stat(raw, &stchar) < 0) { 212dd133929Sthib xperror(raw); 21387304b87Stholo printf("Can't stat %s\n", raw); 21487304b87Stholo return (origname); 21587304b87Stholo } 21687304b87Stholo if (S_ISCHR(stchar.st_mode)) { 21787304b87Stholo return (raw); 21887304b87Stholo } else { 21987304b87Stholo printf("%s is not a character device\n", raw); 22087304b87Stholo return (origname); 22187304b87Stholo } 22287304b87Stholo } else if (S_ISCHR(stblock.st_mode) && !retried) { 22387304b87Stholo newname = unrawname(newname); 22487304b87Stholo retried++; 22587304b87Stholo goto retry; 22687304b87Stholo } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 22787304b87Stholo newname = fsp->fs_spec; 22887304b87Stholo retried++; 22987304b87Stholo goto retry; 23087304b87Stholo } 23187304b87Stholo /* 23287304b87Stholo * Not a block or character device, just return name and 23387304b87Stholo * let the user decide whether to use it. 23487304b87Stholo */ 23587304b87Stholo return (origname); 23687304b87Stholo } 23787304b87Stholo 23887304b87Stholo 23987304b87Stholo void * 240bc52e260Sderaadt emalloc(size_t s) 24187304b87Stholo { 242b166fb0eSderaadt void *p; 243b166fb0eSderaadt 244b166fb0eSderaadt if (s == 0) 245b166fb0eSderaadt err(1, "malloc failed"); 246b166fb0eSderaadt p = malloc(s); 24787304b87Stholo if (p == NULL) 24887304b87Stholo err(1, "malloc failed"); 24987304b87Stholo return p; 25087304b87Stholo } 25187304b87Stholo 25287304b87Stholo 25387304b87Stholo void * 254119ae1adSderaadt ereallocarray(void *p, size_t n, size_t s) 25587304b87Stholo { 2567428f312Sderaadt void *newp; 2577428f312Sderaadt 25834c2ea26Sderaadt if (n == 0 || s == 0) { 25934c2ea26Sderaadt free(p); 260b166fb0eSderaadt err(1, "realloc failed"); 26134c2ea26Sderaadt } 262119ae1adSderaadt newp = reallocarray(p, n, s); 2637428f312Sderaadt if (newp == NULL) { 2647428f312Sderaadt free(p); 26587304b87Stholo err(1, "realloc failed"); 2667428f312Sderaadt } 2677428f312Sderaadt return newp; 26887304b87Stholo } 26987304b87Stholo 27087304b87Stholo 27187304b87Stholo char * 272bc52e260Sderaadt estrdup(const char *s) 27387304b87Stholo { 27487304b87Stholo char *p = strdup(s); 27587304b87Stholo if (p == NULL) 27687304b87Stholo err(1, "strdup failed"); 27787304b87Stholo return p; 27887304b87Stholo } 279