1 /* $NetBSD: opendisk.c,v 1.12 2009/10/13 22:00:31 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 __RCSID("$NetBSD: opendisk.c,v 1.12 2009/10/13 22:00:31 pooka Exp $"); 35 #endif 36 37 #include <sys/param.h> 38 39 #include <assert.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <util.h> 43 #include <paths.h> 44 #include <stdio.h> 45 #include <string.h> 46 47 static int 48 __opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked, 49 int (*ofn)(const char *, int, ...)) 50 { 51 int f, rawpart; 52 53 if (buf == NULL) { 54 errno = EFAULT; 55 return (-1); 56 } 57 snprintf(buf, buflen, "%s", path); 58 59 if ((flags & O_CREAT) != 0) { 60 errno = EINVAL; 61 return (-1); 62 } 63 64 #ifndef __minix 65 rawpart = getrawpartition(); 66 if (rawpart < 0) 67 return (-1); /* sysctl(3) in getrawpartition sets errno */ 68 #endif 69 70 f = ofn(buf, flags, 0); 71 if (f != -1 || errno != ENOENT) 72 return (f); 73 74 #ifndef __minix 75 snprintf(buf, buflen, "%s%c", path, 'a' + rawpart); 76 f = ofn(buf, flags, 0); 77 if (f != -1 || errno != ENOENT) 78 return (f); 79 80 if (strchr(path, '/') != NULL) 81 return (-1); 82 83 snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path); 84 f = ofn(buf, flags, 0); 85 if (f != -1 || errno != ENOENT) 86 return (f); 87 88 snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path, 89 'a' + rawpart); 90 f = ofn(buf, flags, 0); 91 #endif 92 return (f); 93 } 94 95 int 96 opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked) 97 { 98 99 return __opendisk(path, flags, buf, buflen, iscooked, open); 100 } 101 102 int 103 opendisk1(const char *path, int flags, char *buf, size_t buflen, int iscooked, 104 int (*ofn)(const char *, int, ...)) 105 { 106 107 return __opendisk(path, flags, buf, buflen, iscooked, ofn); 108 } 109