1 /* $OpenBSD: opendisk.c,v 1.5 2008/06/26 05:42:05 ray Exp $ */ 2 /* $NetBSD: opendisk.c,v 1.4 1997/09/30 17:13:50 phil Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #include <sys/param.h> 35 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <paths.h> 39 #include <stdio.h> 40 #include <string.h> 41 42 #include "util.h" 43 44 int 45 opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked) 46 { 47 int f, rawpart; 48 49 snprintf(buf, buflen, "%s", path); 50 51 if ((flags & O_CREAT) != 0) { 52 errno = EINVAL; 53 return (-1); 54 } 55 56 rawpart = getrawpartition(); 57 if (rawpart < 0) 58 return (-1); /* sysctl(3) in getrawpartition sets errno */ 59 60 f = open(buf, flags); 61 if (f != -1 || errno != ENOENT) 62 return (f); 63 64 snprintf(buf, buflen, "%s%c", path, 'a' + rawpart); 65 f = open(buf, flags); 66 if (f != -1 || errno != ENOENT) 67 return (f); 68 69 if (strchr(path, '/') != NULL) 70 return (-1); 71 72 snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path); 73 f = open(buf, flags); 74 if (f != -1 || errno != ENOENT) 75 return (f); 76 77 snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path, 78 'a' + rawpart); 79 f = open(buf, flags); 80 return (f); 81 } 82