1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/***************************************************************************
* CVSID: $Id: hal-storage-mount.c,v 1.7 2006/06/21 00:44:03 david Exp $
*
* hal-storage-cleanup-mountpoint.c : Cleanup mount point when hald detects
* that an unmount not done through Unmount()
*
* Copyright (C) 2006 David Zeuthen, <david@fubar.dk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "hal-storage-shared.h"
/*#define DEBUG*/
#define DEBUG
static void
usage (void)
{
fprintf (stderr, "This program should only be started by hald.\n");
exit (1);
}
static void
do_cleanup (const char *mount_point)
{
int i, j;
FILE *hal_mtab_orig;
int hal_mtab_orig_len;
int num_read;
char *hal_mtab_buf;
char **lines;
FILE *hal_mtab_new;
gboolean found;
hal_mtab_orig = fopen ("/media/.hal-mtab", "r");
if (hal_mtab_orig == NULL) {
unknown_error ("Cannot open /media/.hal-mtab");
}
if (fseek (hal_mtab_orig, 0L, SEEK_END) != 0) {
unknown_error ("Cannot seek to end of /media/.hal-mtab");
}
hal_mtab_orig_len = ftell (hal_mtab_orig);
if (hal_mtab_orig_len < 0) {
unknown_error ("Cannot determine size of /media/.hal-mtab");
}
rewind (hal_mtab_orig);
hal_mtab_buf = g_new0 (char, hal_mtab_orig_len + 1);
num_read = fread (hal_mtab_buf, 1, hal_mtab_orig_len, hal_mtab_orig);
if (num_read != hal_mtab_orig_len) {
unknown_error ("Cannot read from /media/.hal-mtab");
}
fclose (hal_mtab_orig);
#ifdef DEBUG
printf ("hal_mtab = '%s'\n", hal_mtab_buf);
#endif
lines = g_strsplit (hal_mtab_buf, "\n", 0);
g_free (hal_mtab_buf);
/* find the entry we're going to unmount */
found = FALSE;
for (i = 0; lines[i] != NULL && !found; i++) {
char **line_elements;
#ifdef DEBUG
printf (" line = '%s'\n", lines[i]);
#endif
if ((lines[i])[0] == '#')
continue;
line_elements = g_strsplit (lines[i], "\t", 6);
if (g_strv_length (line_elements) == 6) {
#ifdef DEBUG
printf (" devfile = '%s'\n", line_elements[0]);
printf (" uid = '%s'\n", line_elements[1]);
printf (" session id = '%s'\n", line_elements[2]);
printf (" fs = '%s'\n", line_elements[3]);
printf (" options = '%s'\n", line_elements[4]);
printf (" mount_point = '%s'\n", line_elements[5]);
#endif
if (strcmp (line_elements[5], mount_point) == 0) {
char *line_to_free;
found = TRUE;
line_to_free = lines[i];
for (j = i; lines[j] != NULL; j++) {
lines[j] = lines[j+1];
}
lines[j] = NULL;
g_free (line_to_free);
}
}
g_strfreev (line_elements);
}
if (!found) {
unknown_error ("mount point is not /media/.hal-mtab");
}
#ifdef DEBUG
printf ("Found entry for mount point '%s' in /media/.hal-mtab", mount_point);
#endif
/* create new .hal-mtab~ file without the entry we're going to unmount */
hal_mtab_new = fopen ("/media/.hal-mtab~", "w");
if (hal_mtab_new == NULL) {
unknown_error ("Cannot create /media/.hal-mtab~");
}
for (i = 0; lines[i] != NULL; i++) {
if (i > 0) {
char anewl[2] = "\n\0";
if (fwrite (anewl, 1, 1, hal_mtab_new) != 1) {
unknown_error ("Cannot write to /media/.hal-mtab~");
}
}
if (fwrite (lines[i], 1, strlen (lines[i]), hal_mtab_new) != strlen (lines[i])) {
unknown_error ("Cannot write to /media/.hal-mtab~");
}
}
fclose (hal_mtab_new);
g_strfreev (lines);
printf ("removing directory: %s", mount_point);
/* remove directory */
if (g_rmdir (mount_point) != 0) {
unlink ("/media/.hal-mtab~");
unknown_error ("Cannot remove directory");
}
printf ("atomically creating new /media/.hal-mtab file");
/* set new .hal-mtab file */
if (rename ("/media/.hal-mtab~", "/media/.hal-mtab") != 0) {
unlink ("/media/.hal-mtab~");
unknown_error ("Cannot rename /media/.hal-mtab~ to /media/.hal-mtab");
}
printf ("hal-storage-cleanup-mountpoint done for %s", mount_point);
}
int
main (int argc, char *argv[])
{
char *mount_point;
if (!lock_hal_mtab ()) {
unknown_error ("Cannot obtain lock on /media/.hal-mtab");
}
mount_point = getenv ("HALD_CLEANUP");
if (mount_point == NULL)
usage ();
#ifdef DEBUG
printf ("in hal-storage-cleanup-mountpoint for mount point '%s'\n", mount_point);
#endif
do_cleanup (mount_point);
unlock_hal_mtab ();
return 0;
}
|
