1 /***************************************************************************
2 * CVSID: $Id$
3 *
4 * hal-storage-unmount.c : Unmount wrapper
5 *
6 * Copyright (C) 2006 David Zeuthen, <david@fubar.dk>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 **************************************************************************/
23
24
25 #ifdef HAVE_CONFIG_H
26 # include <config.h>
27 #endif
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <glib.h>
33 #include <glib/gstdio.h>
34 #ifdef __FreeBSD__
35 #include <fstab.h>
36 #include <sys/param.h>
37 #include <sys/ucred.h>
38 #include <sys/mount.h>
39 #include <limits.h>
40 #include <pwd.h>
41 #elif sun
42 #include <fcntl.h>
43 #include <sys/mnttab.h>
44 #include <sys/vfstab.h>
45 #else
46 #include <mntent.h>
47 #endif
48 #include <sys/types.h>
49 #include <unistd.h>
50
51 #include <libhal.h>
52 #include <libhal-storage.h>
53 #ifdef HAVE_POLKIT
54 #include <libpolkit.h>
55 #endif
56
57 #include "hal-storage-shared.h"
58
59
60 static void
usage(void)61 usage (void)
62 {
63 fprintf (stderr, "This program should only be started by hald.\n");
64 exit (1);
65 }
66
67 static void
invalid_unmount_option(const char * option,const char * uid)68 invalid_unmount_option (const char *option, const char *uid)
69 {
70 fprintf (stderr, "org.freedesktop.Hal.Device.Volume.InvalidUnmountOption\n");
71 fprintf (stderr, "The option '%s' is not allowed for uid=%s\n", option, uid);
72 exit (1);
73 }
74
75 int
main(int argc,char * argv[])76 main (int argc, char *argv[])
77 {
78 char *udi;
79 char *device;
80 LibHalVolume *volume;
81 DBusError error;
82 LibHalContext *hal_ctx = NULL;
83 DBusConnection *system_bus = NULL;
84 #ifdef HAVE_POLKIT
85 LibPolKitContext *pol_ctx = NULL;
86 #endif
87 char *invoked_by_uid;
88 char *invoked_by_syscon_name;
89 int i;
90 char unmount_options[1024];
91 char **given_options;
92 gboolean use_lazy;
93 gboolean use_force;
94 const char *end;
95
96 if (!lock_hal_mtab ()) {
97 unknown_error ("Cannot obtain lock on /media/.hal-mtab");
98 }
99
100 device = getenv ("HAL_PROP_BLOCK_DEVICE");
101 if (device == NULL)
102 usage ();
103
104 udi = getenv ("HAL_PROP_INFO_UDI");
105 if (udi == NULL)
106 usage ();
107
108 invoked_by_uid = getenv ("HAL_METHOD_INVOKED_BY_UID");
109
110 invoked_by_syscon_name = getenv ("HAL_METHOD_INVOKED_BY_SYSTEMBUS_CONNECTION_NAME");
111
112 dbus_error_init (&error);
113 if ((hal_ctx = libhal_ctx_init_direct (&error)) == NULL) {
114 printf ("Cannot connect to hald\n");
115 LIBHAL_FREE_DBUS_ERROR (&error);
116 usage ();
117 }
118
119 dbus_error_init (&error);
120 system_bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
121 if (system_bus == NULL) {
122 printf ("Cannot connect to the system bus\n");
123 LIBHAL_FREE_DBUS_ERROR (&error);
124 usage ();
125 }
126 #ifdef HAVE_POLKIT
127 pol_ctx = libpolkit_new_context (system_bus);
128 if (pol_ctx == NULL) {
129 printf ("Cannot get libpolkit context\n");
130 unknown_error ("Cannot get libpolkit context");
131 }
132 #endif
133
134 /* read from stdin */
135 if (strlen (fgets (unmount_options, sizeof (unmount_options), stdin)) > 0)
136 unmount_options [strlen (unmount_options) - 1] = '\0';
137 /* validate that input from stdin is UTF-8 */
138 if (!g_utf8_validate (unmount_options, -1, &end))
139 unknown_error ("Error validating unmount_options as UTF-8");
140 #ifdef DEBUG
141 printf ("unmount_options = '%s'\n", unmount_options);
142 #endif
143
144 /* delete any trailing whitespace options from splitting the string */
145 given_options = g_strsplit (unmount_options, "\t", 0);
146 for (i = g_strv_length (given_options) - 1; i >= 0; --i) {
147 if (strlen (given_options[i]) > 0)
148 break;
149 given_options[i] = NULL;
150 }
151
152 use_lazy = FALSE;
153 use_force = FALSE;
154
155 /* check unmount options */
156 for (i = 0; given_options[i] != NULL; i++) {
157 char *given = given_options[i];
158
159 if (strcmp (given, "lazy") == 0) {
160 use_lazy = TRUE;
161 } else if (strcmp (given, "force") == 0) {
162 use_force = TRUE;
163 } else {
164 invalid_unmount_option (given, invoked_by_uid);
165 }
166 }
167 g_strfreev (given_options);
168
169
170 volume = libhal_volume_from_udi (hal_ctx, udi);
171 if (volume == NULL) {
172 LibHalDrive *drive;
173
174 drive = libhal_drive_from_udi (hal_ctx, udi);
175 if (drive == NULL) {
176 usage ();
177 } else {
178 handle_unmount (hal_ctx,
179 #ifdef HAVE_POLKIT
180 pol_ctx,
181 #endif
182 udi, NULL, drive, device, invoked_by_uid,
183 invoked_by_syscon_name, use_lazy, use_force,
184 system_bus);
185 }
186
187 } else {
188 const char *drive_udi;
189 LibHalDrive *drive;
190
191 drive_udi = libhal_volume_get_storage_device_udi (volume);
192
193 if (drive_udi == NULL)
194 unknown_error ("Cannot get drive_udi from volume");
195 drive = libhal_drive_from_udi (hal_ctx, drive_udi);
196 if (drive == NULL)
197 unknown_error ("Cannot get drive from hal");
198
199 handle_unmount (hal_ctx,
200 #ifdef HAVE_POLKIT
201 pol_ctx,
202 #endif
203 udi, volume, drive, device, invoked_by_uid,
204 invoked_by_syscon_name, use_lazy, use_force,
205 system_bus);
206
207 }
208
209 unlock_hal_mtab ();
210
211 return 0;
212 }
213