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1 /*
2 * Copyright (c) 1997-2005 Erez Zadok
3 * Copyright (c) 1989 Jan-Simon Pendry
4 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
5 * Copyright (c) 1989 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Jan-Simon Pendry at Imperial College, London.
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 acknowledgment:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *
40 * File: am-utils/amd/amfs_program.c
41 *
42 */
43
44 /*
45 * Program file system
46 */
47
48 #ifdef HAVE_CONFIG_H
49 # include <config.h>
50 #endif /* HAVE_CONFIG_H */
51 #include <am_defs.h>
52 #include <amd.h>
53
54 /* forward definitions */
55 static char *amfs_program_match(am_opts *fo);
56 static int amfs_program_mount(am_node *am, mntfs *mf);
57 static int amfs_program_umount(am_node *am, mntfs *mf);
58 static int amfs_program_init(mntfs *mf);
59
60 /*
61 * Ops structure
62 */
63 am_ops amfs_program_ops =
64 {
65 "program",
66 amfs_program_match,
67 amfs_program_init,
68 amfs_program_mount,
69 amfs_program_umount,
70 amfs_error_lookup_child,
71 amfs_error_mount_child,
72 amfs_error_readdir,
73 0, /* amfs_program_readlink */
74 0, /* amfs_program_mounted */
75 0, /* amfs_program_umounted */
76 amfs_generic_find_srvr,
77 0, /* amfs_program_get_wchan */
78 FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
79 #ifdef HAVE_FS_AUTOFS
80 AUTOFS_PROGRAM_FS_FLAGS,
81 #endif /* HAVE_FS_AUTOFS */
82 };
83
84
85 /*
86 * Execute needs a mount and unmount command.
87 */
88 static char *
89 amfs_program_match(am_opts *fo)
90 {
91 char *prog;
92
93 if (fo->opt_unmount && fo->opt_umount) {
94 plog(XLOG_ERROR, "program: cannot specify both unmount and umount options");
95 return 0;
96 }
97 if (!fo->opt_mount) {
98 plog(XLOG_ERROR, "program: must specify mount command");
99 return 0;
100 }
101 if (!fo->opt_unmount && !fo->opt_umount) {
102 fo->opt_unmount = str3cat(NULL, UNMOUNT_PROGRAM, " umount ", fo->opt_fs);
103 plog(XLOG_INFO, "program: un/umount not specified; using default \"%s\"",
104 fo->opt_unmount);
105 }
106 prog = strchr(fo->opt_mount, ' ');
107
108 return strdup(prog ? prog + 1 : fo->opt_mount);
109 }
110
111
112 static int
113 amfs_program_init(mntfs *mf)
114 {
115 /* check if already saved value */
116 if (mf->mf_private != NULL)
117 return 0;
118
119 /* save unmount (or umount) command */
120 if (mf->mf_fo->opt_unmount != NULL)
121 mf->mf_private = (opaque_t) strdup(mf->mf_fo->opt_unmount);
122 else
123 mf->mf_private = (opaque_t) strdup(mf->mf_fo->opt_umount);
124 mf->mf_prfree = (void (*)(opaque_t)) free;
125
126 return 0;
127 }
128
129
130 static int
131 amfs_program_exec(char *info)
132 {
133 char **xivec;
134 int error;
135
136 /*
137 * Split copy of command info string
138 */
139 info = strdup(info);
140 if (info == 0)
141 return ENOBUFS;
142 xivec = strsplit(info, ' ', '\'');
143
144 /*
145 * Put stdout to stderr
146 */
147 (void) fclose(stdout);
148 if (!logfp)
149 logfp = stderr; /* initialize before possible first use */
150 (void) dup(fileno(logfp));
151 if (fileno(logfp) != fileno(stderr)) {
152 (void) fclose(stderr);
153 (void) dup(fileno(logfp));
154 }
155
156 /*
157 * Try the exec
158 */
159 if (amuDebug(D_FULL)) {
160 char **cp = xivec;
161 plog(XLOG_DEBUG, "executing (un)mount command...");
162 while (*cp) {
163 plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp);
164 cp++;
165 }
166 }
167
168 if (xivec[0] == 0 || xivec[1] == 0) {
169 errno = EINVAL;
170 plog(XLOG_USER, "1st/2nd args missing to (un)mount program");
171 } else {
172 (void) execv(xivec[0], xivec + 1);
173 }
174
175 /*
176 * Save error number
177 */
178 error = errno;
179 plog(XLOG_ERROR, "exec failed: %m");
180
181 /*
182 * Free allocate memory
183 */
184 XFREE(info);
185 XFREE(xivec);
186
187 /*
188 * Return error
189 */
190 return error;
191 }
192
193
194 static int
195 amfs_program_mount(am_node *am, mntfs *mf)
196 {
197 return amfs_program_exec(mf->mf_fo->opt_mount);
198 }
199
200
201 static int
202 amfs_program_umount(am_node *am, mntfs *mf)
203 {
204 return amfs_program_exec((char *) mf->mf_private);
205 }
206
