1 /***************************************************************************
2 *
3 * hal-storage-eject.c : Eject method handler
4 *
5 * Copyright (C) 2006 David Zeuthen, <david@fubar.dk>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 **************************************************************************/
22
23
24 #ifdef HAVE_CONFIG_H
25 # include <config.h>
26 #endif
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <glib.h>
32 #include <glib/gstdio.h>
33 #include <sys/types.h>
34 #include <unistd.h>
35
36 #include <libhal.h>
37 #include <libhal-storage.h>
38 #ifdef HAVE_POLKIT
39 #include <libpolkit.h>
40 #endif
41
42 #include "hal-storage-shared.h"
43
44 /* possible values: "Volume", "Storage" */
45 static char *devtype = "Volume";
46
47
48 static void
usage(void)49 usage (void)
50 {
51 fprintf (stderr, "This program should only be started by hald.\n");
52 exit (1);
53 }
54
55
56 void static
unknown_eject_error(const char * detail)57 unknown_eject_error (const char *detail)
58 {
59 fprintf (stderr, "org.freedesktop.Hal.Device.%s.UnknownFailure\n", devtype);
60 fprintf (stderr, "%s\n", detail);
61 exit (1);
62 }
63
64
65 static void
invalid_eject_option(const char * option,const char * uid)66 invalid_eject_option (const char *option, const char *uid)
67 {
68 fprintf (stderr, "org.freedesktop.Hal.Device.Volume.InvalidEjectOption\n");
69 fprintf (stderr, "The option '%s' is not allowed for uid=%s\n", option, uid);
70 exit (1);
71 }
72
73
74 int
main(int argc,char * argv[])75 main (int argc, char *argv[])
76 {
77 char *udi;
78 char *device;
79 const char *drive_udi;
80 LibHalDrive *drive;
81 LibHalVolume *volume;
82 DBusError error;
83 LibHalContext *hal_ctx = NULL;
84 DBusConnection *system_bus = NULL;
85 #ifdef HAVE_POLKIT
86 LibPolKitContext *pol_ctx = NULL;
87 #endif
88 char *invoked_by_uid;
89 char *invoked_by_syscon_name;
90 char **volume_udis;
91 int num_volumes;
92 int i;
93 char eject_options[1024];
94 char **given_options;
95 const char *end;
96
97 device = getenv ("HAL_PROP_BLOCK_DEVICE");
98 if (device == NULL)
99 usage ();
100
101 udi = getenv ("HAL_PROP_INFO_UDI");
102 if (udi == NULL)
103 usage ();
104
105 invoked_by_uid = getenv ("HAL_METHOD_INVOKED_BY_UID");
106
107 invoked_by_syscon_name = getenv ("HAL_METHOD_INVOKED_BY_SYSTEMBUS_CONNECTION_NAME");
108
109 dbus_error_init (&error);
110 if ((hal_ctx = libhal_ctx_init_direct (&error)) == NULL) {
111 printf ("Cannot connect to hald\n");
112 LIBHAL_FREE_DBUS_ERROR (&error);
113 usage ();
114 }
115
116 dbus_error_init (&error);
117 system_bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
118 if (system_bus == NULL) {
119 printf ("Cannot connect to the system bus\n");
120 LIBHAL_FREE_DBUS_ERROR (&error);
121 usage ();
122 }
123 #ifdef HAVE_POLKIT
124 pol_ctx = libpolkit_new_context (system_bus);
125 if (pol_ctx == NULL) {
126 printf ("Cannot get libpolkit context\n");
127 unknown_eject_error ("Cannot get libpolkit context");
128 }
129 #endif
130
131 /* read from stdin */
132 if (strlen (fgets (eject_options, sizeof (eject_options), stdin)) > 0)
133 eject_options [strlen (eject_options) - 1] = '\0';
134 /* validate that input from stdin is UTF-8 */
135 if (!g_utf8_validate (eject_options, -1, &end))
136 unknown_eject_error ("Error validating eject_options as UTF-8");
137 #ifdef DEBUG
138 printf ("eject_options = '%s'\n", eject_options);
139 #endif
140
141 /* delete any trailing whitespace options from splitting the string */
142 given_options = g_strsplit (eject_options, "\t", 0);
143 for (i = g_strv_length (given_options) - 1; i >= 0; --i) {
144 if (strlen (given_options[i]) > 0)
145 break;
146 given_options[i] = NULL;
147 }
148
149 /* check eject options */
150 for (i = 0; given_options[i] != NULL; i++) {
151 char *given = given_options[i];
152
153 /* none supported right now */
154
155 invalid_eject_option (given, invoked_by_uid);
156 }
157 g_strfreev (given_options);
158
159 /* should be either volume or storage */
160 if ((volume = libhal_volume_from_udi (hal_ctx, udi)) != NULL) {
161 drive_udi = libhal_volume_get_storage_device_udi (volume);
162 } else {
163 drive_udi = g_strdup (udi);
164 devtype = "Storage";
165 }
166 if (drive_udi == NULL) {
167 unknown_eject_error ("Cannot get drive udi");
168 }
169 if ((drive = libhal_drive_from_udi (hal_ctx, drive_udi)) == NULL) {
170 unknown_eject_error ("Cannot get drive from udi");
171 }
172
173 /* first, unmount all volumes */
174 volume_udis = libhal_drive_find_all_volumes (hal_ctx, drive, &num_volumes);
175 if (volume_udis == NULL)
176 unknown_eject_error ("Cannot get all enclosed volumes");
177 for (i = 0; i < num_volumes; i++) {
178 char *volume_udi;
179 LibHalVolume *volume_to_unmount;
180
181 volume_udi = volume_udis[i];
182
183 #ifdef DEBUG
184 printf ("processing drive's volume %s (%d of %d)\n", volume_udi, i + 1, num_volumes);
185 #endif
186 volume_to_unmount = libhal_volume_from_udi (hal_ctx, volume_udi);
187 if (volume_to_unmount == NULL) {
188 unknown_eject_error ("Cannot get volume object");
189 }
190
191 if (libhal_volume_is_mounted (volume_to_unmount)) {
192 #ifdef DEBUG
193 printf (" unmounting\n");
194 #endif
195 /* only lock around unmount call because hald's /proc/mounts handler
196 * will also want to lock the /media/.hal-mtab-lock file for peeking
197 */
198 if (!lock_hal_mtab ()) {
199 unknown_eject_error ("Cannot obtain lock on /media/.hal-mtab");
200 }
201 handle_unmount (hal_ctx,
202 #ifdef HAVE_POLKIT
203 pol_ctx,
204 #endif
205 volume_udi, volume_to_unmount, drive,
206 libhal_volume_get_device_file (volume_to_unmount),
207 invoked_by_uid, invoked_by_syscon_name,
208 FALSE, FALSE, system_bus); /* use neither lazy nor force */
209 unlock_hal_mtab ();
210 } else {
211 #ifdef DEBUG
212 printf (" not mounted\n");
213 #endif
214 }
215
216 libhal_volume_free (volume_to_unmount);
217
218 }
219 libhal_free_string_array (volume_udis);
220
221 /* now attempt the eject */
222 handle_eject (hal_ctx,
223 #ifdef HAVE_POLKIT
224 pol_ctx,
225 #endif
226 libhal_drive_get_udi (drive),
227 drive,
228 libhal_drive_get_device_file (drive),
229 invoked_by_uid,
230 invoked_by_syscon_name,
231 FALSE, system_bus);
232
233 return 0;
234 }
235
236
237