1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or https://opensource.org/licenses/CDDL-1.0.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2011, Fajar A. Nugraha. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <ctype.h>
27 #include <errno.h>
28 #include <fcntl.h>
29 #include <stdio.h>
30 #include <string.h>
31 #include <unistd.h>
32 #include <sys/fs/zfs.h>
33 #include <sys/ioctl.h>
34 #include <sys/stat.h>
35
36 #if defined(ZFS_ASAN_ENABLED)
37 /*
38 * zvol_id is invoked by udev with the help of ptrace()
39 * making sanitized binary with leak detection croak
40 * because of tracing mechanisms collision
41 */
42 extern const char *__asan_default_options(void);
43
__asan_default_options(void)44 const char *__asan_default_options(void) {
45 return ("abort_on_error=true:halt_on_error=true:"
46 "allocator_may_return_null=true:disable_coredump=false:"
47 "detect_stack_use_after_return=true:detect_leaks=false");
48 }
49 #endif
50
51 int
main(int argc,const char * const * argv)52 main(int argc, const char *const *argv)
53 {
54 if (argc != 2 || strncmp(argv[1], "/dev/zd", 7) != 0) {
55 fprintf(stderr, "usage: %s /dev/zdX\n", argv[0]);
56 return (1);
57 }
58 const char *dev_name = argv[1];
59 size_t i, len;
60
61 int fd;
62 struct stat sb;
63 if ((fd = open(dev_name, O_RDONLY|O_CLOEXEC)) == -1 ||
64 fstat(fd, &sb) != 0) {
65 fprintf(stderr, "%s: %s\n", dev_name, strerror(errno));
66 return (1);
67 }
68
69 char zvol_name[MAXNAMELEN + strlen("-part") + 10];
70 if (ioctl(fd, BLKZNAME, zvol_name) == -1) {
71 fprintf(stderr, "%s: BLKZNAME: %s\n",
72 dev_name, strerror(errno));
73 return (1);
74 }
75
76 const char *dev_part = strrchr(dev_name, 'p');
77 len = strlen(zvol_name);
78 if (dev_part != NULL) {
79 sprintf(zvol_name + len, "-part%s", dev_part + 1);
80 len = strlen(zvol_name);
81 }
82
83 for (i = 0; i < len; ++i)
84 if (isblank(zvol_name[i]))
85 zvol_name[i] = '+';
86
87 puts(zvol_name);
88
89 return (0);
90 }
91