amfs_program.c revision 119679 
1/*
2 * Copyright (c) 1997-2003 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 *      %W% (Berkeley) %G%
40 *
41 * $Id: amfs_program.c,v 1.6.2.3 2002/12/27 22:44:32 ezk Exp $
42 *
43 */
44
45/*
46 * Program file system
47 */
48
49#ifdef HAVE_CONFIG_H
50# include <config.h>
51#endif /* HAVE_CONFIG_H */
52#include <am_defs.h>
53#include <amd.h>
54
55/* forward definitions */
56static char *amfs_program_match(am_opts *fo);
57static int amfs_program_fmount(mntfs *mf);
58static int amfs_program_fumount(mntfs *mf);
59static int amfs_program_init(mntfs *mf);
60
61/*
62 * Ops structure
63 */
64am_ops amfs_program_ops =
65{
66  "program",
67  amfs_program_match,
68  amfs_program_init,
69  amfs_auto_fmount,
70  amfs_program_fmount,
71  amfs_auto_fumount,
72  amfs_program_fumount,
73  amfs_error_lookuppn,
74  amfs_error_readdir,
75  0,				/* amfs_program_readlink */
76  0,				/* amfs_program_mounted */
77  0,				/* amfs_program_umounted */
78  find_amfs_auto_srvr,
79  FS_BACKGROUND | FS_AMQINFO
80};
81
82
83/*
84 * Execute needs a mount and unmount command.
85 */
86static char *
87amfs_program_match(am_opts *fo)
88{
89  char *prog;
90
91  if (!fo->opt_mount || !fo->opt_unmount) {
92    plog(XLOG_ERROR, "program: both mount and unmount must be specified");
93    return 0;
94  }
95  prog = strchr(fo->opt_mount, ' ');
96
97  return strdup(prog ? prog + 1 : fo->opt_mount);
98}
99
100
101static int
102amfs_program_init(mntfs *mf)
103{
104  /*
105   * Save unmount command
106   */
107  if (mf->mf_refc == 1) {
108    mf->mf_private = (voidp) strdup(mf->mf_fo->opt_unmount);
109    mf->mf_prfree = (void (*)(voidp)) free;
110  }
111
112  return 0;
113}
114
115
116static int
117amfs_program_exec(char *info)
118{
119  char **xivec;
120  int error;
121
122  /*
123   * Split copy of command info string
124   */
125  info = strdup(info);
126  if (info == 0)
127    return ENOBUFS;
128  xivec = strsplit(info, ' ', '\'');
129
130  /*
131   * Put stdout to stderr
132   */
133  (void) fclose(stdout);
134  if (!logfp)
135    logfp = stderr;		/* initialize before possible first use */
136  (void) dup(fileno(logfp));
137  if (fileno(logfp) != fileno(stderr)) {
138    (void) fclose(stderr);
139    (void) dup(fileno(logfp));
140  }
141
142  /*
143   * Try the exec
144   */
145#ifdef DEBUG
146  amuDebug(D_FULL) {
147    char **cp = xivec;
148    plog(XLOG_DEBUG, "executing (un)mount command...");
149    while (*cp) {
150      plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp);
151      cp++;
152    }
153  }
154#endif /* DEBUG */
155
156  if (xivec[0] == 0 || xivec[1] == 0) {
157    errno = EINVAL;
158    plog(XLOG_USER, "1st/2nd args missing to (un)mount program");
159  } else {
160    (void) execv(xivec[0], xivec + 1);
161  }
162
163  /*
164   * Save error number
165   */
166  error = errno;
167  plog(XLOG_ERROR, "exec failed: %m");
168
169  /*
170   * Free allocate memory
171   */
172  XFREE(info);
173  XFREE(xivec);
174
175  /*
176   * Return error
177   */
178  return error;
179}
180
181
182static int
183amfs_program_fmount(mntfs *mf)
184{
185  return amfs_program_exec(mf->mf_fo->opt_mount);
186}
187
188
189static int
190amfs_program_fumount(mntfs *mf)
191{
192  return amfs_program_exec((char *) mf->mf_private);
193}
194