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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 #pragma ident "%Z%%M% %I% %E% SMI"
23
24 /*
25 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <errno.h>
33 #include <sys/mount.h>
34 #include <sys/types.h>
35 #include <locale.h>
36 #include <sys/stat.h>
37 #include <fslib.h>
38 #include <stdio.h>
39 #include <sys/mnttab.h>
40 #include <poll.h>
41
42 #define MNTTYPE_TMPFS "tmpfs"
43
44 static int nmflg = 0;
45 static int qflg = 0;
46
47 static boolean_t
in_mnttab(char * mountp)48 in_mnttab(char *mountp)
49 {
50 FILE *file;
51 int found = B_FALSE;
52 struct mnttab mntent;
53
54 if ((file = fopen("/etc/mnttab", "r")) == NULL)
55 return (B_FALSE);
56 while (getmntent(file, &mntent) == 0) {
57 if (mntent.mnt_mountp != NULL &&
58 strcmp(mntent.mnt_mountp, mountp) == 0 &&
59 mntent.mnt_fstype != NULL &&
60 strcmp(mntent.mnt_fstype, MNTTYPE_TMPFS) == 0) {
61 found = B_TRUE;
62 break;
63 }
64 }
65 (void) fclose(file);
66 return (found);
67 }
68
69 int
main(int argc,char * argv[])70 main(int argc, char *argv[])
71 {
72 /* mount information */
73 char *special;
74 char *mountp;
75
76 int c;
77 char *myname;
78 char typename[64];
79 extern int optind;
80 extern char *optarg;
81 int error = 0;
82 int verbose = 0;
83 int mflg = 0;
84 int optcnt = 0;
85 int mount_attempts = 5;
86
87 char optbuf[MAX_MNTOPT_STR];
88 int optsize = 0;
89 char *saveoptbuf;
90
91 (void) setlocale(LC_ALL, "");
92
93 #if !defined(TEXT_DOMAIN)
94 #define TEXT_DOMAIN "SYS_TEST"
95 #endif
96 (void) textdomain(TEXT_DOMAIN);
97
98 myname = strrchr(argv[0], '/');
99 myname = myname ? myname + 1 : argv[0];
100 (void) snprintf(typename, sizeof (typename), "%s_%s",
101 MNTTYPE_TMPFS, myname);
102 argv[0] = typename;
103 optbuf[0] = '\0';
104
105 while ((c = getopt(argc, argv, "?o:VmOq")) != EOF) {
106 switch (c) {
107 case 'V':
108 verbose++;
109 break;
110 case '?':
111 error++;
112 break;
113 case 'm':
114 nmflg++;
115 break;
116 case 'O':
117 mflg |= MS_OVERLAY;
118 break;
119 case 'o':
120 (void) strncpy(optbuf, optarg, MAX_MNTOPT_STR);
121 optbuf[MAX_MNTOPT_STR - 1] = '\0';
122 optsize = strlen(optbuf);
123
124 if (verbose)
125 (void) fprintf(stderr, "optsize:%d optbuf:%s\n",
126 optsize, optbuf);
127 break;
128 case 'q':
129 qflg++;
130 break;
131 }
132 }
133
134 if (verbose && !error) {
135 char *optptr;
136
137 (void) fprintf(stderr, "%s", typename);
138 for (optcnt = 1; optcnt < argc; optcnt++) {
139 optptr = argv[optcnt];
140 if (optptr)
141 (void) fprintf(stderr, " %s", optptr);
142 }
143 (void) fprintf(stderr, "\n");
144 }
145
146 if (argc - optind != 2 || error) {
147 (void) fprintf(stderr,
148 gettext("Usage: %s [-o size] swap mount_point\n"),
149 typename);
150 exit(32);
151 }
152
153 special = argv[optind++];
154 mountp = argv[optind++];
155 mflg |= MS_OPTIONSTR;
156 mflg |= (nmflg ? MS_NOMNTTAB : 0);
157
158 if (verbose) {
159 (void) fprintf(stderr, "mount(%s, \"%s\", %d, %s",
160 special, mountp, mflg, MNTTYPE_TMPFS);
161 if (optsize)
162 (void) fprintf(stderr, ", \"%s\", %d)\n",
163 optbuf, strlen(optbuf));
164 else
165 (void) fprintf(stderr, ")\n");
166 }
167 if (optsize) {
168 if ((saveoptbuf = strdup(optbuf)) == NULL) {
169 (void) fprintf(stderr, gettext("%s: out of memory\n"),
170 "mount");
171 exit(1);
172 }
173 }
174 again: if (mount(special, mountp, mflg, MNTTYPE_TMPFS, NULL, 0,
175 optbuf, MAX_MNTOPT_STR)) {
176 if (errno == EBUSY && !(mflg & MS_OVERLAY)) {
177 /*
178 * Because of bug 6176743, any attempt to mount
179 * tmpfs filesystem could fail for reasons
180 * described in that bug. We're trying to detect
181 * that situation here by checking that the filesystem
182 * we're mounting is not in /etc/mnttab yet.
183 * When that bug is fixed, this code can be removed.
184 */
185 if (!in_mnttab(mountp) && mount_attempts-- > 0) {
186 (void) poll(NULL, 0, 50);
187 goto again;
188 }
189 (void) fprintf(stderr, gettext(
190 "%s: %s is already mounted or %s is busy\n"),
191 myname, mountp, special);
192 } else {
193 perror("mount");
194 }
195 exit(32);
196 }
197
198 if (optsize && !qflg)
199 cmp_requested_to_actual_options(saveoptbuf, optbuf,
200 special, mountp);
201 return (0);
202 }
203