/*************************************************************************** * * hal-storage-eject.c : Eject method handler * * 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 <stdio.h> #include <stdlib.h> #include <string.h> #include <glib.h> #include <glib/gstdio.h> #include <sys/types.h> #include <unistd.h> #include <libhal.h> #include <libhal-storage.h> #ifdef HAVE_POLKIT #include <libpolkit.h> #endif #include "hal-storage-shared.h" /* possible values: "Volume", "Storage" */ static char *devtype = "Volume"; static void usage (void) { fprintf (stderr, "This program should only be started by hald.\n"); exit (1); } void static unknown_eject_error (const char *detail) { fprintf (stderr, "org.freedesktop.Hal.Device.%s.UnknownFailure\n", devtype); fprintf (stderr, "%s\n", detail); exit (1); } static void invalid_eject_option (const char *option, const char *uid) { fprintf (stderr, "org.freedesktop.Hal.Device.Volume.InvalidEjectOption\n"); fprintf (stderr, "The option '%s' is not allowed for uid=%s\n", option, uid); exit (1); } int main (int argc, char *argv[]) { char *udi; char *device; const char *drive_udi; LibHalDrive *drive; LibHalVolume *volume; DBusError error; LibHalContext *hal_ctx = NULL; DBusConnection *system_bus = NULL; #ifdef HAVE_POLKIT LibPolKitContext *pol_ctx = NULL; #endif char *invoked_by_uid; char *invoked_by_syscon_name; char **volume_udis; int num_volumes; int i; char eject_options[1024]; char **given_options; const char *end; device = getenv ("HAL_PROP_BLOCK_DEVICE"); if (device == NULL) usage (); udi = getenv ("HAL_PROP_INFO_UDI"); if (udi == NULL) usage (); invoked_by_uid = getenv ("HAL_METHOD_INVOKED_BY_UID"); invoked_by_syscon_name = getenv ("HAL_METHOD_INVOKED_BY_SYSTEMBUS_CONNECTION_NAME"); dbus_error_init (&error); if ((hal_ctx = libhal_ctx_init_direct (&error)) == NULL) { printf ("Cannot connect to hald\n"); LIBHAL_FREE_DBUS_ERROR (&error); usage (); } dbus_error_init (&error); system_bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error); if (system_bus == NULL) { printf ("Cannot connect to the system bus\n"); LIBHAL_FREE_DBUS_ERROR (&error); usage (); } #ifdef HAVE_POLKIT pol_ctx = libpolkit_new_context (system_bus); if (pol_ctx == NULL) { printf ("Cannot get libpolkit context\n"); unknown_eject_error ("Cannot get libpolkit context"); } #endif /* read from stdin */ if (strlen (fgets (eject_options, sizeof (eject_options), stdin)) > 0) eject_options [strlen (eject_options) - 1] = '\0'; /* validate that input from stdin is UTF-8 */ if (!g_utf8_validate (eject_options, -1, &end)) unknown_eject_error ("Error validating eject_options as UTF-8"); #ifdef DEBUG printf ("eject_options = '%s'\n", eject_options); #endif /* delete any trailing whitespace options from splitting the string */ given_options = g_strsplit (eject_options, "\t", 0); for (i = g_strv_length (given_options) - 1; i >= 0; --i) { if (strlen (given_options[i]) > 0) break; given_options[i] = NULL; } /* check eject options */ for (i = 0; given_options[i] != NULL; i++) { char *given = given_options[i]; /* none supported right now */ invalid_eject_option (given, invoked_by_uid); } g_strfreev (given_options); /* should be either volume or storage */ if ((volume = libhal_volume_from_udi (hal_ctx, udi)) != NULL) { drive_udi = libhal_volume_get_storage_device_udi (volume); } else { drive_udi = g_strdup (udi); devtype = "Storage"; } if (drive_udi == NULL) { unknown_eject_error ("Cannot get drive udi"); } if ((drive = libhal_drive_from_udi (hal_ctx, drive_udi)) == NULL) { unknown_eject_error ("Cannot get drive from udi"); } /* first, unmount all volumes */ volume_udis = libhal_drive_find_all_volumes (hal_ctx, drive, &num_volumes); if (volume_udis == NULL) unknown_eject_error ("Cannot get all enclosed volumes"); for (i = 0; i < num_volumes; i++) { char *volume_udi; LibHalVolume *volume_to_unmount; volume_udi = volume_udis[i]; #ifdef DEBUG printf ("processing drive's volume %s (%d of %d)\n", volume_udi, i + 1, num_volumes); #endif volume_to_unmount = libhal_volume_from_udi (hal_ctx, volume_udi); if (volume_to_unmount == NULL) { unknown_eject_error ("Cannot get volume object"); } if (libhal_volume_is_mounted (volume_to_unmount)) { #ifdef DEBUG printf (" unmounting\n"); #endif /* only lock around unmount call because hald's /proc/mounts handler * will also want to lock the /media/.hal-mtab-lock file for peeking */ if (!lock_hal_mtab ()) { unknown_eject_error ("Cannot obtain lock on /media/.hal-mtab"); } handle_unmount (hal_ctx, #ifdef HAVE_POLKIT pol_ctx, #endif volume_udi, volume_to_unmount, drive, libhal_volume_get_device_file (volume_to_unmount), invoked_by_uid, invoked_by_syscon_name, FALSE, FALSE, system_bus); /* use neither lazy nor force */ unlock_hal_mtab (); } else { #ifdef DEBUG printf (" not mounted\n"); #endif } libhal_volume_free (volume_to_unmount); } libhal_free_string_array (volume_udis); /* now attempt the eject */ handle_eject (hal_ctx, #ifdef HAVE_POLKIT pol_ctx, #endif libhal_drive_get_udi (drive), drive, libhal_drive_get_device_file (drive), invoked_by_uid, invoked_by_syscon_name, FALSE, system_bus); return 0; }