| 1 | /*␊ |
| 2 | * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. Please obtain a copy of the License at␊ |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
| 11 | * file.␊ |
| 12 | * ␊ |
| 13 | * The Original Code and all software distributed under the License are␊ |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 18 | * Please see the License for the specific language governing rights and␊ |
| 19 | * limitations under the License.␊ |
| 20 | * ␊ |
| 21 | * @APPLE_LICENSE_HEADER_END@␊ |
| 22 | */␊ |
| 23 | ␊ |
| 24 | ␊ |
| 25 | /*␊ |
| 26 | * Copyright (c) 2000, Todd C. Miller. All rights reserved.␊ |
| 27 | * Copyright (c) 1996, Jason Downs. All rights reserved.␊ |
| 28 | *␊ |
| 29 | * Redistribution and use in source and binary forms, with or without␊ |
| 30 | * modification, are permitted provided that the following conditions␊ |
| 31 | * are met:␊ |
| 32 | * 1. Redistributions of source code must retain the above copyright␊ |
| 33 | * notice, this list of conditions and the following disclaimer.␊ |
| 34 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 35 | * notice, this list of conditions and the following disclaimer in the␊ |
| 36 | * documentation and/or other materials provided with the distribution.␊ |
| 37 | *␊ |
| 38 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS␊ |
| 39 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED␊ |
| 40 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE␊ |
| 41 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,␊ |
| 42 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES␊ |
| 43 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR␊ |
| 44 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER␊ |
| 45 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 46 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 47 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 48 | * SUCH DAMAGE.␊ |
| 49 | */␊ |
| 50 | ␊ |
| 51 | #include <errno.h>␊ |
| 52 | #include <fcntl.h>␊ |
| 53 | #include <limits.h>␊ |
| 54 | #include <paths.h>␊ |
| 55 | #include <stdio.h>␊ |
| 56 | #include <string.h>␊ |
| 57 | ␊ |
| 58 | #include "util.h"␊ |
| 59 | /*␊ |
| 60 | * This routine is a generic rewrite of the original code found in␊ |
| 61 | * disklabel(8).␊ |
| 62 | */␊ |
| 63 | ␊ |
| 64 | int␊ |
| 65 | opendev(path, oflags, dflags, realpath)␊ |
| 66 | ␉char *path;␊ |
| 67 | ␉int oflags;␊ |
| 68 | ␉int dflags;␊ |
| 69 | ␉char **realpath;␊ |
| 70 | {␊ |
| 71 | ␉int fd;␊ |
| 72 | ␉char *slash, *prefix;␊ |
| 73 | ␉static char namebuf[PATH_MAX];␊ |
| 74 | ␊ |
| 75 | ␉/* Initial state */␊ |
| 76 | ␉if (realpath)␊ |
| 77 | ␉␉*realpath = path;␊ |
| 78 | ␉fd = -1;␊ |
| 79 | ␉errno = ENOENT;␊ |
| 80 | ␊ |
| 81 | ␉if (dflags & OPENDEV_BLCK)␊ |
| 82 | ␉␉prefix = "";␉␉␉/* block device */␊ |
| 83 | ␉else␊ |
| 84 | ␉␉prefix = "r";␉␉␉/* character device */␊ |
| 85 | ␊ |
| 86 | ␉if ((slash = strchr(path, '/')))␊ |
| 87 | ␉␉fd = open(path, oflags);␊ |
| 88 | ␉else if (dflags & OPENDEV_PART) {␊ |
| 89 | ␉␉/*␊ |
| 90 | ␉␉ * First try raw partition (for removable drives)␊ |
| 91 | ␉␉ */␊ |
| 92 | ␉␉if (snprintf(namebuf, sizeof(namebuf), "%s%s%s%c",␊ |
| 93 | ␉␉ _PATH_DEV, prefix, path, 'a' + getrawpartition())␊ |
| 94 | ␉␉ < sizeof(namebuf)) {␊ |
| 95 | ␉␉␉fd = open(namebuf, oflags);␊ |
| 96 | ␉␉␉if (realpath)␊ |
| 97 | ␉␉␉␉*realpath = namebuf;␊ |
| 98 | ␉␉} else␊ |
| 99 | ␉␉␉errno = ENAMETOOLONG;␊ |
| 100 | ␉}␊ |
| 101 | ␉if (!slash && fd == -1 && errno == ENOENT) {␊ |
| 102 | ␉␉if (snprintf(namebuf, sizeof(namebuf), "%s%s%s",␊ |
| 103 | ␉␉ _PATH_DEV, prefix, path) < sizeof(namebuf)) {␊ |
| 104 | ␉␉␉fd = open(namebuf, oflags);␊ |
| 105 | ␉␉␉if (realpath)␊ |
| 106 | ␉␉␉␉*realpath = namebuf;␊ |
| 107 | ␉␉} else␊ |
| 108 | ␉␉␉errno = ENAMETOOLONG;␊ |
| 109 | ␉}␊ |
| 110 | ␉return (fd);␊ |
| 111 | }␊ |
| 112 | |
