1 /* $OpenBSD: opendisk.c,v 1.2 2001/08/16 18:34:40 millert 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #include <sys/cdefs.h> 41 #include <sys/param.h> 42 43 #include <errno.h> 44 #include <fcntl.h> 45 #include <paths.h> 46 #include <stdio.h> 47 #include <string.h> 48 49 #include "util.h" 50 51 int 52 opendisk(path, flags, buf, buflen, iscooked) 53 const char *path; 54 int flags; 55 char *buf; 56 size_t buflen; 57 int iscooked; 58 { 59 int f, rawpart; 60 61 if (buf == NULL) { 62 errno = EFAULT; 63 return (-1); 64 } 65 snprintf(buf, buflen, "%s", path); 66 67 if ((flags & O_CREAT) != 0) { 68 errno = EINVAL; 69 return (-1); 70 } 71 72 rawpart = getrawpartition(); 73 if (rawpart < 0) 74 return (-1); /* sysctl(3) in getrawpartition sets errno */ 75 76 f = open(buf, flags); 77 if (f != -1 || errno != ENOENT) 78 return (f); 79 80 snprintf(buf, buflen, "%s%c", path, 'a' + rawpart); 81 f = open(buf, flags); 82 if (f != -1 || errno != ENOENT) 83 return (f); 84 85 if (strchr(path, '/') != NULL) 86 return (-1); 87 88 snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path); 89 f = open(buf, flags); 90 if (f != -1 || errno != ENOENT) 91 return (f); 92 93 snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path, 94 'a' + rawpart); 95 f = open(buf, flags); 96 return (f); 97 } 98