drm/i915: Fix hangs on some broadwell machines
[dragonfly.git] / contrib / amd / amd / amfs_program.c
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984263bc
MD
1/*
2 * Copyright (c) 1997-1999 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 1.5 1999/09/30 21:01:30 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}