tools/llvm: Do not build with symbols
[minix3.git] / lib / libutil / getfsspecname.c
blob0f0ebc905a312363900c516e222a65584aff58d1
1 /* $NetBSD: getfsspecname.c,v 1.4 2013/01/01 18:32:17 dsl Exp $ */
3 /*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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.
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.
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: getfsspecname.c,v 1.4 2013/01/01 18:32:17 dsl Exp $");
34 #include <sys/types.h>
35 #include <sys/ioctl.h>
36 #include <sys/sysctl.h>
37 #include <sys/disk.h>
39 #include <stdio.h>
40 #include <vis.h>
41 #include <string.h>
42 #include <fstab.h>
43 #include <fcntl.h>
44 #include <stdlib.h>
45 #include <errno.h>
46 #include <unistd.h>
47 #include <util.h>
49 #if !defined(__minix)
50 #define COMPAT_DKWEDGE /* To be removed */
51 #endif /* !defined(__minix) */
53 const char *
54 getfsspecname(char *buf, size_t bufsiz, const char *name)
56 static const int mib[] = { CTL_HW, HW_DISKNAMES };
57 static const unsigned int miblen = __arraycount(mib);
58 char *drives, *dk;
59 size_t len;
60 int fd, savee;
61 char *vname;
63 drives = NULL;
64 vname = NULL;
65 if (strncasecmp(name, "NAME=", 5) != 0) {
66 #ifdef COMPAT_DKWEDGE
68 * We try to open the disk name, and if we fail with EBUSY
69 * we use the name as the label to find the wedge.
71 char rbuf[MAXPATHLEN];
72 if (name[0] == '/') {
73 if (getdiskrawname(rbuf, sizeof(rbuf), name) != NULL) {
74 if ((fd = open(rbuf, O_RDONLY)) == -1) {
75 if (errno == EBUSY) {
76 name = strrchr(name, '/') + 1;
77 goto search;
79 } else
80 close(fd);
83 #endif
84 strlcpy(buf, name, bufsiz);
85 return buf;
86 } else
87 name += 5;
89 #ifdef COMPAT_DKWEDGE
90 search:
91 #endif
92 vname = malloc(strlen(name) * 4 + 1);
93 if (vname == NULL) {
94 savee = errno;
95 strlcpy(buf, "malloc failed", bufsiz);
96 goto out;
99 strunvis(vname, name);
101 if (sysctl(mib, miblen, NULL, &len, NULL, 0) == -1) {
102 savee = errno;
103 strlcpy(buf, "sysctl hw.disknames failed", bufsiz);
104 goto out;
107 drives = malloc(len);
108 if (drives == NULL) {
109 savee = errno;
110 strlcpy(buf, "malloc failed", bufsiz);
111 goto out;
113 if (sysctl(mib, miblen, drives, &len, NULL, 0) == -1) {
114 savee = errno;
115 strlcpy(buf, "sysctl hw.disknames failed", bufsiz);
116 goto out;
119 for (dk = strtok(drives, " "); dk != NULL; dk = strtok(NULL, " ")) {
120 struct dkwedge_info dkw;
121 if (strncmp(dk, "dk", 2) != 0)
122 continue;
123 fd = opendisk(dk, O_RDONLY, buf, bufsiz, 0);
124 if (fd == -1)
125 continue;
126 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == -1) {
127 savee = errno;
128 snprintf(buf, bufsiz, "%s: getwedgeinfo", dk);
129 (void)close(fd);
130 goto out;
132 (void)close(fd);
133 if (strcmp(vname, (char *)dkw.dkw_wname) == 0) {
134 char *p = strstr(buf, "/rdk");
135 if (p++ == NULL)
136 return buf;
137 strcpy(p, p + 1);
138 free(drives);
139 free(vname);
140 return buf;
143 savee = ESRCH;
144 snprintf(buf, bufsiz, "no match for `%s'", vname);
145 out:
146 free(drives);
147 free(vname);
148 errno = savee;
149 return NULL;