1*dd133929Sthib /* $OpenBSD: fsutil.c,v 1.14 2006/05/27 22:30:09 thib 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 #ifndef lint 33*dd133929Sthib static const char rcsid[] = "$OpenBSD: fsutil.c,v 1.14 2006/05/27 22:30:09 thib Exp $"; 3487304b87Stholo #endif /* not lint */ 3587304b87Stholo 36f4be0e98Sderaadt #include <sys/param.h> 3787304b87Stholo #include <stdio.h> 3887304b87Stholo #include <string.h> 3987304b87Stholo #include <stdlib.h> 4087304b87Stholo #include <stdarg.h> 4187304b87Stholo #include <errno.h> 4287304b87Stholo #include <fstab.h> 4387304b87Stholo #include <err.h> 4487304b87Stholo 4587304b87Stholo #include <sys/types.h> 4687304b87Stholo #include <sys/stat.h> 4787304b87Stholo 4887304b87Stholo #include "fsutil.h" 4987304b87Stholo 5087304b87Stholo static const char *dev = NULL; 5187304b87Stholo static int hot = 0; 5287304b87Stholo static int preen = 0; 5387304b87Stholo 5487304b87Stholo extern char *__progname; 5587304b87Stholo 56c72b5b24Smillert static void vmsg(int, const char *, va_list); 5787304b87Stholo 5887304b87Stholo void 59bc52e260Sderaadt setcdevname(const char *cd, int pr) 6087304b87Stholo { 6187304b87Stholo dev = cd; 6287304b87Stholo preen = pr; 6387304b87Stholo } 6487304b87Stholo 6587304b87Stholo const char * 66bc52e260Sderaadt cdevname(void) 6787304b87Stholo { 6887304b87Stholo return dev; 6987304b87Stholo } 7087304b87Stholo 7187304b87Stholo int 72bc52e260Sderaadt hotroot(void) 7387304b87Stholo { 7487304b87Stholo return hot; 7587304b87Stholo } 7687304b87Stholo 7787304b87Stholo /*VARARGS*/ 7887304b87Stholo void 7987304b87Stholo errexit(const char *fmt, ...) 8087304b87Stholo { 8187304b87Stholo va_list ap; 8287304b87Stholo 8387304b87Stholo va_start(ap, fmt); 8487304b87Stholo (void) vfprintf(stderr, fmt, ap); 8587304b87Stholo va_end(ap); 8687304b87Stholo exit(8); 8787304b87Stholo } 8887304b87Stholo 8987304b87Stholo static void 90bc52e260Sderaadt vmsg(int fatal, const char *fmt, va_list ap) 9187304b87Stholo { 9287304b87Stholo if (!fatal && preen) 9387304b87Stholo (void) printf("%s: ", dev); 9487304b87Stholo 9587304b87Stholo (void) vprintf(fmt, ap); 96*dd133929Sthib printf("\n"); 9787304b87Stholo if (fatal && preen) { 9887304b87Stholo (void) printf( 9987304b87Stholo "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 10087304b87Stholo dev, __progname); 10187304b87Stholo exit(8); 10287304b87Stholo } 10387304b87Stholo } 10487304b87Stholo 10587304b87Stholo /*VARARGS*/ 10687304b87Stholo void 10787304b87Stholo pfatal(const char *fmt, ...) 10887304b87Stholo { 10987304b87Stholo va_list ap; 11087304b87Stholo 11187304b87Stholo va_start(ap, fmt); 11287304b87Stholo vmsg(1, fmt, ap); 11387304b87Stholo va_end(ap); 11487304b87Stholo } 11587304b87Stholo 11687304b87Stholo /*VARARGS*/ 11787304b87Stholo void 11887304b87Stholo pwarn(const char *fmt, ...) 11987304b87Stholo { 12087304b87Stholo va_list ap; 12187304b87Stholo 12287304b87Stholo va_start(ap, fmt); 12387304b87Stholo vmsg(0, fmt, ap); 12487304b87Stholo va_end(ap); 12587304b87Stholo } 12687304b87Stholo 12787304b87Stholo void 128*dd133929Sthib xperror(const char *s) 12987304b87Stholo { 13087304b87Stholo pfatal("%s (%s)", s, strerror(errno)); 13187304b87Stholo } 13287304b87Stholo 13387304b87Stholo void 13487304b87Stholo panic(const char *fmt, ...) 13587304b87Stholo { 13687304b87Stholo va_list ap; 13787304b87Stholo 13887304b87Stholo va_start(ap, fmt); 13987304b87Stholo vmsg(1, fmt, ap); 14087304b87Stholo va_end(ap); 14187304b87Stholo exit(8); 14287304b87Stholo } 14387304b87Stholo 14487304b87Stholo char * 145bc52e260Sderaadt unrawname(char *name) 14687304b87Stholo { 14787304b87Stholo char *dp; 14887304b87Stholo struct stat stb; 14987304b87Stholo 150f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 15187304b87Stholo return (name); 15287304b87Stholo if (stat(name, &stb) < 0) 15387304b87Stholo return (name); 15487304b87Stholo if (!S_ISCHR(stb.st_mode)) 15587304b87Stholo return (name); 15687304b87Stholo if (dp[1] != 'r') 15787304b87Stholo return (name); 15836286464Sderaadt (void)memmove(&dp[1], &dp[2], strlen(&dp[2]) + 1); 15987304b87Stholo return (name); 16087304b87Stholo } 16187304b87Stholo 16287304b87Stholo char * 163bc52e260Sderaadt rawname(char *name) 16487304b87Stholo { 165f4be0e98Sderaadt static char rawbuf[MAXPATHLEN]; 16687304b87Stholo char *dp; 16787304b87Stholo 168f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 16987304b87Stholo return (0); 17087304b87Stholo *dp = 0; 171f4be0e98Sderaadt (void)strlcpy(rawbuf, name, sizeof rawbuf); 17287304b87Stholo *dp = '/'; 173f4be0e98Sderaadt (void)strlcat(rawbuf, "/r", sizeof rawbuf); 174f4be0e98Sderaadt (void)strlcat(rawbuf, &dp[1], sizeof rawbuf); 17587304b87Stholo return (rawbuf); 17687304b87Stholo } 17787304b87Stholo 17887304b87Stholo char * 179bc52e260Sderaadt blockcheck(char *origname) 18087304b87Stholo { 18187304b87Stholo struct stat stslash, stblock, stchar; 18287304b87Stholo char *newname, *raw; 18387304b87Stholo struct fstab *fsp; 18487304b87Stholo int retried = 0; 18587304b87Stholo 18687304b87Stholo hot = 0; 18787304b87Stholo if (stat("/", &stslash) < 0) { 188*dd133929Sthib xperror("/"); 18987304b87Stholo printf("Can't stat root\n"); 19087304b87Stholo return (origname); 19187304b87Stholo } 19287304b87Stholo newname = origname; 19387304b87Stholo retry: 19487304b87Stholo if (stat(newname, &stblock) < 0) { 195*dd133929Sthib xperror(newname); 19687304b87Stholo printf("Can't stat %s\n", newname); 19787304b87Stholo return (origname); 19887304b87Stholo } 19987304b87Stholo if (S_ISBLK(stblock.st_mode)) { 20087304b87Stholo if (stslash.st_dev == stblock.st_rdev) 20187304b87Stholo hot++; 20287304b87Stholo raw = rawname(newname); 20387304b87Stholo if (stat(raw, &stchar) < 0) { 204*dd133929Sthib xperror(raw); 20587304b87Stholo printf("Can't stat %s\n", raw); 20687304b87Stholo return (origname); 20787304b87Stholo } 20887304b87Stholo if (S_ISCHR(stchar.st_mode)) { 20987304b87Stholo return (raw); 21087304b87Stholo } else { 21187304b87Stholo printf("%s is not a character device\n", raw); 21287304b87Stholo return (origname); 21387304b87Stholo } 21487304b87Stholo } else if (S_ISCHR(stblock.st_mode) && !retried) { 21587304b87Stholo newname = unrawname(newname); 21687304b87Stholo retried++; 21787304b87Stholo goto retry; 21887304b87Stholo } else if ((fsp = getfsfile(newname)) != 0 && !retried) { 21987304b87Stholo newname = fsp->fs_spec; 22087304b87Stholo retried++; 22187304b87Stholo goto retry; 22287304b87Stholo } 22387304b87Stholo /* 22487304b87Stholo * Not a block or character device, just return name and 22587304b87Stholo * let the user decide whether to use it. 22687304b87Stholo */ 22787304b87Stholo return (origname); 22887304b87Stholo } 22987304b87Stholo 23087304b87Stholo 23187304b87Stholo void * 232bc52e260Sderaadt emalloc(size_t s) 23387304b87Stholo { 234b166fb0eSderaadt void *p; 235b166fb0eSderaadt 236b166fb0eSderaadt if (s == 0) 237b166fb0eSderaadt err(1, "malloc failed"); 238b166fb0eSderaadt p = malloc(s); 23987304b87Stholo if (p == NULL) 24087304b87Stholo err(1, "malloc failed"); 24187304b87Stholo return p; 24287304b87Stholo } 24387304b87Stholo 24487304b87Stholo 24587304b87Stholo void * 246bc52e260Sderaadt erealloc(void *p, size_t s) 24787304b87Stholo { 2487428f312Sderaadt void *newp; 2497428f312Sderaadt 250b166fb0eSderaadt if (s == 0) 251b166fb0eSderaadt err(1, "realloc failed"); 2527428f312Sderaadt newp = realloc(p, s); 2537428f312Sderaadt if (newp == NULL) { 2547428f312Sderaadt if (p) 2557428f312Sderaadt free(p); 25687304b87Stholo err(1, "realloc failed"); 2577428f312Sderaadt } 2587428f312Sderaadt return newp; 25987304b87Stholo } 26087304b87Stholo 26187304b87Stholo 26287304b87Stholo char * 263bc52e260Sderaadt estrdup(const char *s) 26487304b87Stholo { 26587304b87Stholo char *p = strdup(s); 26687304b87Stholo if (p == NULL) 26787304b87Stholo err(1, "strdup failed"); 26887304b87Stholo return p; 26987304b87Stholo } 270