1*f4be0e98Sderaadt /* $OpenBSD: fsutil.c,v 1.8 2002/09/06 21:16:16 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. 1687304b87Stholo * 3. All advertising materials mentioning features or use of this software 1787304b87Stholo * must display the following acknowledgement: 1887304b87Stholo * This product includes software developed by the University of 1987304b87Stholo * California, Berkeley and its contributors. 2087304b87Stholo * 4. Neither the name of the University nor the names of its contributors 2187304b87Stholo * may be used to endorse or promote products derived from this software 2287304b87Stholo * without specific prior written permission. 2387304b87Stholo * 2487304b87Stholo * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2587304b87Stholo * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2687304b87Stholo * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2787304b87Stholo * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2887304b87Stholo * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2987304b87Stholo * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3087304b87Stholo * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3187304b87Stholo * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3287304b87Stholo * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3387304b87Stholo * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3487304b87Stholo * SUCH DAMAGE. 3587304b87Stholo */ 3687304b87Stholo #ifndef lint 3787304b87Stholo static char rcsid[] = "$NetBSD: fsutil.c,v 1.2 1996/10/03 20:06:31 christos Exp $"; 3887304b87Stholo #endif /* not lint */ 3987304b87Stholo 40*f4be0e98Sderaadt #include <sys/param.h> 4187304b87Stholo #include <stdio.h> 4287304b87Stholo #include <string.h> 4387304b87Stholo #include <stdlib.h> 4487304b87Stholo #include <stdarg.h> 4587304b87Stholo #include <errno.h> 4687304b87Stholo #include <fstab.h> 4787304b87Stholo #include <err.h> 4887304b87Stholo 4987304b87Stholo #include <sys/types.h> 5087304b87Stholo #include <sys/stat.h> 5187304b87Stholo 5287304b87Stholo #include "fsutil.h" 5387304b87Stholo 5487304b87Stholo static const char *dev = NULL; 5587304b87Stholo static int hot = 0; 5687304b87Stholo static int preen = 0; 5787304b87Stholo 5887304b87Stholo extern char *__progname; 5987304b87Stholo 60c72b5b24Smillert static void vmsg(int, const char *, va_list); 6187304b87Stholo 6287304b87Stholo void 63bc52e260Sderaadt setcdevname(const char *cd, int pr) 6487304b87Stholo { 6587304b87Stholo dev = cd; 6687304b87Stholo preen = pr; 6787304b87Stholo } 6887304b87Stholo 6987304b87Stholo const char * 70bc52e260Sderaadt cdevname(void) 7187304b87Stholo { 7287304b87Stholo return dev; 7387304b87Stholo } 7487304b87Stholo 7587304b87Stholo int 76bc52e260Sderaadt hotroot(void) 7787304b87Stholo { 7887304b87Stholo return hot; 7987304b87Stholo } 8087304b87Stholo 8187304b87Stholo /*VARARGS*/ 8287304b87Stholo void 8387304b87Stholo errexit(const char *fmt, ...) 8487304b87Stholo { 8587304b87Stholo va_list ap; 8687304b87Stholo 8787304b87Stholo va_start(ap, fmt); 8887304b87Stholo (void) vfprintf(stderr, fmt, ap); 8987304b87Stholo va_end(ap); 9087304b87Stholo exit(8); 9187304b87Stholo } 9287304b87Stholo 9387304b87Stholo static void 94bc52e260Sderaadt vmsg(int fatal, const char *fmt, va_list ap) 9587304b87Stholo { 9687304b87Stholo if (!fatal && preen) 9787304b87Stholo (void) printf("%s: ", dev); 9887304b87Stholo 9987304b87Stholo (void) vprintf(fmt, ap); 10087304b87Stholo 10187304b87Stholo if (fatal && preen) { 10262d85a42Sian (void) printf("\n"); 10387304b87Stholo (void) printf( 10487304b87Stholo "%s: UNEXPECTED INCONSISTENCY; RUN %s MANUALLY.\n", 10587304b87Stholo dev, __progname); 10687304b87Stholo exit(8); 10787304b87Stholo } 10887304b87Stholo } 10987304b87Stholo 11087304b87Stholo /*VARARGS*/ 11187304b87Stholo void 11287304b87Stholo pfatal(const char *fmt, ...) 11387304b87Stholo { 11487304b87Stholo va_list ap; 11587304b87Stholo 11687304b87Stholo va_start(ap, fmt); 11787304b87Stholo vmsg(1, fmt, ap); 11887304b87Stholo va_end(ap); 11987304b87Stholo } 12087304b87Stholo 12187304b87Stholo /*VARARGS*/ 12287304b87Stholo void 12387304b87Stholo pwarn(const char *fmt, ...) 12487304b87Stholo { 12587304b87Stholo va_list ap; 12687304b87Stholo 12787304b87Stholo va_start(ap, fmt); 12887304b87Stholo vmsg(0, fmt, ap); 12987304b87Stholo va_end(ap); 13087304b87Stholo } 13187304b87Stholo 13287304b87Stholo void 133bc52e260Sderaadt perror(const char *s) 13487304b87Stholo { 13587304b87Stholo pfatal("%s (%s)", s, strerror(errno)); 13687304b87Stholo } 13787304b87Stholo 13887304b87Stholo void 13987304b87Stholo panic(const char *fmt, ...) 14087304b87Stholo { 14187304b87Stholo va_list ap; 14287304b87Stholo 14387304b87Stholo va_start(ap, fmt); 14487304b87Stholo vmsg(1, fmt, ap); 14587304b87Stholo va_end(ap); 14687304b87Stholo exit(8); 14787304b87Stholo } 14887304b87Stholo 14987304b87Stholo char * 150bc52e260Sderaadt unrawname(char *name) 15187304b87Stholo { 15287304b87Stholo char *dp; 15387304b87Stholo struct stat stb; 15487304b87Stholo 155*f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 15687304b87Stholo return (name); 15787304b87Stholo if (stat(name, &stb) < 0) 15887304b87Stholo return (name); 15987304b87Stholo if (!S_ISCHR(stb.st_mode)) 16087304b87Stholo return (name); 16187304b87Stholo if (dp[1] != 'r') 16287304b87Stholo return (name); 16387304b87Stholo (void)strcpy(&dp[1], &dp[2]); 16487304b87Stholo return (name); 16587304b87Stholo } 16687304b87Stholo 16787304b87Stholo char * 168bc52e260Sderaadt rawname(char *name) 16987304b87Stholo { 170*f4be0e98Sderaadt static char rawbuf[MAXPATHLEN]; 17187304b87Stholo char *dp; 17287304b87Stholo 173*f4be0e98Sderaadt if ((dp = strrchr(name, '/')) == NULL) 17487304b87Stholo return (0); 17587304b87Stholo *dp = 0; 176*f4be0e98Sderaadt (void)strlcpy(rawbuf, name, sizeof rawbuf); 17787304b87Stholo *dp = '/'; 178*f4be0e98Sderaadt (void)strlcat(rawbuf, "/r", sizeof rawbuf); 179*f4be0e98Sderaadt (void)strlcat(rawbuf, &dp[1], sizeof rawbuf); 18087304b87Stholo return (rawbuf); 18187304b87Stholo } 18287304b87Stholo 18387304b87Stholo char * 184bc52e260Sderaadt blockcheck(char *origname) 18587304b87Stholo { 18687304b87Stholo struct stat stslash, stblock, stchar; 18787304b87Stholo char *newname, *raw; 18887304b87Stholo struct fstab *fsp; 18987304b87Stholo int retried = 0; 19087304b87Stholo 19187304b87Stholo hot = 0; 19287304b87Stholo if (stat("/", &stslash) < 0) { 19387304b87Stholo perror("/"); 19487304b87Stholo printf("Can't stat root\n"); 19587304b87Stholo return (origname); 19687304b87Stholo } 19787304b87Stholo newname = origname; 19887304b87Stholo retry: 19987304b87Stholo if (stat(newname, &stblock) < 0) { 20087304b87Stholo perror(newname); 20187304b87Stholo printf("Can't stat %s\n", newname); 20287304b87Stholo return (origname); 20387304b87Stholo } 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) { 20987304b87Stholo perror(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 * 251bc52e260Sderaadt erealloc(void *p, size_t s) 25287304b87Stholo { 253b166fb0eSderaadt if (s == 0) 254b166fb0eSderaadt err(1, "realloc failed"); 25587304b87Stholo p = realloc(p, s); 25687304b87Stholo if (p == NULL) 25787304b87Stholo err(1, "realloc failed"); 25887304b87Stholo return p; 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