OpenSolaris_b135/cmd/hal/tools/hal-storage-mount.c
/***************************************************************************
* CVSID: $Id$
*
* hal-storage-mount.c : Mount wrapper
*
* 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>
#ifdef __FreeBSD__
#include <fstab.h>
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <limits.h>
#include <pwd.h>
#elif sun
#include <sys/mnttab.h>
#include <sys/vfstab.h>
#include <sys/wait.h>
#else
#include <mntent.h>
#endif
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <syslog.h>
#include <libhal.h>
#include <libhal-storage.h>
#ifdef HAVE_POLKIT
#include <libpolkit.h>
#endif
#include "hal-storage-shared.h"
#ifdef __FreeBSD__
#define MOUNT "/sbin/mount"
#define MOUNT_OPTIONS "noexec,nosuid"
#define MOUNT_TYPE_OPT "-t"
#elif sun
#define MOUNT "/sbin/mount"
#define MOUNT_OPTIONS "nosuid"
#define MOUNT_TYPE_OPT "-F"
#else
#define MOUNT "/bin/mount"
#define MOUNT_OPTIONS "noexec,nosuid,nodev"
#define MOUNT_TYPE_OPT "-t"
#endif
static void
usage (void)
{
fprintf (stderr, "This program should only be started by hald.\n");
exit (1);
}
static void
permission_denied_volume_ignore (const char *device)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.PermissionDenied\n");
fprintf (stderr, "Device has %s volume.ignore set to TRUE. Refusing to mount.\n", device);
exit (1);
}
static void
permission_denied_etc_fstab (const char *device)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.PermissionDenied\n");
fprintf (stderr, "Device %s is listed in /etc/fstab. Refusing to mount.\n", device);
exit (1);
}
static void
already_mounted (const char *device)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.AlreadyMounted\n");
fprintf (stderr, "Device %s is already mounted.\n", device);
exit (1);
}
static void
invalid_mount_option (const char *option, const char *uid)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.InvalidMountOption\n");
fprintf (stderr, "The option '%s' is not allowed for uid=%s\n", option, uid);
exit (1);
}
static void
unknown_filesystem (const char *filesystem)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.UnknownFilesystemType\n");
fprintf (stderr, "Unknown file system '%s'\n", filesystem);
exit (1);
}
static void
invalid_mount_point (const char *mount_point)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.InvalidMountpoint\n");
fprintf (stderr, "The mount point '%s' is invalid\n", mount_point);
exit (1);
}
static void
mount_point_not_available (const char *mount_point)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.MountPointNotAvailable\n");
fprintf (stderr, "The mount point '%s' is already occupied\n", mount_point);
exit (1);
}
static void
cannot_remount (const char *device)
{
fprintf (stderr, "org.freedesktop.Hal.Device.Volume.CannotRemount\n");
fprintf (stderr, "%s not mounted already\n", device);
exit (1);
}
#ifdef HAVE_POLKIT
static void
permission_denied_privilege (const char *privilege, const char *uid)
{
fprintf (stderr, "org.freedesktop.Hal.Device.PermissionDeniedByPolicy\n");
fprintf (stderr, "%s refused uid %s\n", privilege, uid);
exit (1);
}
#endif
/* borrowed from gtk/gtkfilesystemunix.c in GTK+ on 02/23/2006 */
static void
canonicalize_filename (gchar *filename)
{
gchar *p, *q;
gboolean last_was_slash = FALSE;
p = filename;
q = filename;
while (*p)
{
if (*p == G_DIR_SEPARATOR)
{
if (!last_was_slash)
*q++ = G_DIR_SEPARATOR;
last_was_slash = TRUE;
}
else
{
if (last_was_slash && *p == '.')
{
if (*(p + 1) == G_DIR_SEPARATOR ||
*(p + 1) == '\0')
{
if (*(p + 1) == '\0')
break;
p += 1;
}
else if (*(p + 1) == '.' &&
(*(p + 2) == G_DIR_SEPARATOR ||
*(p + 2) == '\0'))
{
if (q > filename + 1)
{
q--;
while (q > filename + 1 &&
*(q - 1) != G_DIR_SEPARATOR)
q--;
}
if (*(p + 2) == '\0')
break;
p += 2;
}
else
{
*q++ = *p;
last_was_slash = FALSE;
}
}
else
{
*q++ = *p;
last_was_slash = FALSE;
}
}
p++;
}
if (q > filename + 1 && *(q - 1) == G_DIR_SEPARATOR)
q--;
*q = '\0';
}
static char *
resolve_symlink (const char *file)
{
GError *error;
char *dir;
char *link;
char *f;
char *f1;
f = g_strdup (file);
while (g_file_test (f, G_FILE_TEST_IS_SYMLINK)) {
link = g_file_read_link (f, &error);
if (link == NULL) {
g_warning ("Cannot resolve symlink %s: %s", f, error->message);
g_error_free (error);
g_free (f);
f = NULL;
goto out;
}
dir = g_path_get_dirname (f);
f1 = g_strdup_printf ("%s/%s", dir, link);
g_free (dir);
g_free (link);
g_free (f);
f = f1;
}
out:
if (f != NULL)
canonicalize_filename (f);
return f;
}
static LibHalVolume *
volume_findby (LibHalContext *hal_ctx, const char *property, const char *value)
{
int i;
char **hal_udis;
int num_hal_udis;
LibHalVolume *result = NULL;
char *found_udi = NULL;
DBusError error;
dbus_error_init (&error);
if ((hal_udis = libhal_manager_find_device_string_match (hal_ctx, property,
value, &num_hal_udis, &error)) == NULL) {
LIBHAL_FREE_DBUS_ERROR (&error);
goto out;
}
for (i = 0; i < num_hal_udis; i++) {
char *udi;
udi = hal_udis[i];
if (libhal_device_query_capability (hal_ctx, udi, "volume", &error)) {
found_udi = strdup (udi);
break;
}
}
libhal_free_string_array (hal_udis);
if (found_udi != NULL)
result = libhal_volume_from_udi (hal_ctx, found_udi);
free (found_udi);
out:
return result;
}
static void
bailout_if_in_fstab (LibHalContext *hal_ctx, const char *device, const char *label, const char *uuid)
{
gpointer handle;
char *entry;
char *_mount_point;
printf (" label '%s' uuid '%s'\n", label ? label : "" , uuid ? uuid : "");
/* check if /etc/fstab mentions this device... (with symlinks etc) */
if (! fstab_open (&handle)) {
printf ("cannot open /etc/fstab\n");
unknown_error ("Cannot open /etc/fstab");
}
while ((entry = fstab_next (handle, &_mount_point)) != NULL) {
char *resolved;
#ifdef DEBUG
printf ("Looking at /etc/fstab entry '%s'\n", entry);
#endif
if (label != NULL && g_str_has_prefix (entry, "LABEL=")) {
if (strcmp (entry + 6, label) == 0) {
gboolean skip_fstab_entry;
skip_fstab_entry = FALSE;
/* (heck, we also do the stuff below in gnome-mount) */
/* OK, so what's if someone attaches an external disk with the label '/' and
* /etc/fstab has
*
* LABEL=/ / ext3 defaults 1 1
*
* in /etc/fstab as most Red Hat systems do? Bugger, this is a very common use
* case; suppose that you take the disk from your Fedora server and attaches it
* to your laptop. Bingo, you now have two disks with the label '/'. One must
* seriously wonder if using things like LABEL=/ for / is a good idea; just
* what happens if you boot in this configuration? (answer: the initrd gets
* it wrong most of the time.. sigh)
*
* To work around this, check if the listed entry in /etc/fstab is already mounted,
* if it is, then check if it's the same device_file as the given one...
*/
/* see if a volume is mounted at this mount point */
if (_mount_point != NULL) {
LibHalVolume *mounted_vol;
mounted_vol = volume_findby (hal_ctx, "volume.mount_point", _mount_point);
if (mounted_vol != NULL) {
const char *mounted_vol_device_file;
mounted_vol_device_file = libhal_volume_get_device_file (mounted_vol);
/* no need to resolve symlinks, hal uses the canonical device file */
if (mounted_vol_device_file != NULL &&
strcmp (mounted_vol_device_file, device) !=0) {
#ifdef DEBUG
printf ("Wanting to mount %s that has label %s, but /etc/fstab says LABEL=%s is to be mounted at mount point '%s'. However %s (that also has label %s), is already mounted at said mount point. So, skipping said /etc/fstab entry.\n",
device, label, label, _mount_point, mounted_vol_device_file, _mount_point);
#endif
skip_fstab_entry = TRUE;
}
libhal_volume_free (mounted_vol);
}
}
if (!skip_fstab_entry) {
printf ("%s found in /etc/fstab. Not mounting.\n", entry);
permission_denied_etc_fstab (device);
}
}
} else if (uuid != NULL && g_str_has_prefix (entry, "UUID=")) {
if (strcmp (entry + 5, uuid) == 0) {
printf ("%s found in /etc/fstab. Not mounting.\n", entry);
permission_denied_etc_fstab (device);
}
} else {
resolved = resolve_symlink (entry);
#ifdef DEBUG
printf ("/etc/fstab: device %s -> %s \n", entry, resolved);
#endif
if (strcmp (device, resolved) == 0) {
printf ("%s (-> %s) found in /etc/fstab. Not mounting.\n", entry, resolved);
permission_denied_etc_fstab (device);
}
g_free (resolved);
}
}
fstab_close (handle);
}
static gboolean
device_is_mounted (const char *device, char **mount_point)
{
gpointer handle;
char *entry;
gboolean ret;
ret = FALSE;
/* check if /proc/mounts mentions this device... (with symlinks etc) */
if (! mtab_open (&handle)) {
printf ("cannot open mount list\n");
unknown_error ("Cannot open /etc/mtab or equivalent");
}
while (((entry = mtab_next (handle, mount_point)) != NULL) && (ret == FALSE)) {
char *resolved;
resolved = resolve_symlink (entry);
#ifdef DEBUG
printf ("/proc/mounts: device %s -> %s \n", entry, resolved);
#endif
if (strcmp (device, resolved) == 0) {
printf ("%s (-> %s) found in mount list. Not mounting.\n", entry, resolved);
ret = TRUE;
}
g_free (resolved);
}
mtab_close (handle);
return ret;
}
/* maps volume_id fs types to the appropriate -t mount option */
static const char *
map_fstype (const char *fstype)
{
#ifdef __FreeBSD__
if (! strcmp (fstype, "iso9660"))
return "cd9660";
else if (! strcmp (fstype, "ext2"))
return "ext2fs";
else if (! strcmp (fstype, "vfat"))
return "msdosfs";
#elif sun
if (! strcmp (fstype, "iso9660"))
return "hsfs";
else if (! strcmp (fstype, "vfat"))
return "pcfs";
#endif
return fstype;
}
static void
handle_mount (LibHalContext *hal_ctx,
#ifdef HAVE_POLKIT
LibPolKitContext *pol_ctx,
#endif
const char *udi,
LibHalVolume *volume, LibHalDrive *drive, const char *device,
const char *invoked_by_uid, const char *invoked_by_syscon_name,
DBusConnection *system_bus)
{
int i, j;
DBusError error;
char mount_point[256];
char mount_fstype[256];
char mount_options[1024];
char **allowed_options;
char **given_options;
gboolean wants_to_change_uid;
char *mount_dir;
GError *err = NULL;
char *sout = NULL;
char *serr = NULL;
int exit_status;
char *args[10];
int na;
GString *mount_option_str;
gboolean pol_is_fixed;
gboolean pol_change_uid;
char *privilege;
gboolean is_remount;
#ifdef HAVE_POLKIT
gboolean allowed_by_privilege;
gboolean is_temporary_privilege;
#endif
gboolean explicit_mount_point_given;
const char *end;
#ifdef __FreeBSD__
struct passwd *pw;
uid_t calling_uid;
gid_t calling_gid;
#endif
const char *label;
const char *uuid;
const char *model;
const char *drive_type;
#ifdef sun
adt_export_data_t *adt_data;
size_t adt_data_size;
gboolean append_ro = FALSE;
gboolean is_abs_path = FALSE;
uid_t calling_uid;
calling_uid = atol (invoked_by_uid);
#endif
#ifdef DEBUG
printf ("device = %s\n", device);
printf ("invoked by uid = %s\n", invoked_by_uid);
printf ("invoked by system bus connection = %s\n", invoked_by_syscon_name);
#endif
if (volume != NULL) {
dbus_error_init (&error);
if (libhal_device_get_property_bool (hal_ctx, udi, "volume.ignore", &error) ||
dbus_error_is_set (&error)) {
if (dbus_error_is_set (&error)) {
LIBHAL_FREE_DBUS_ERROR (&error);
}
/*
* When device allocation is enabled (bsmconv or TX), we
* set volume.ignore on all volumes, but still want
* Mount() to succeed when called from the euid=0
* device allocation program.
*/
if (atol (invoked_by_uid) != 0) {
permission_denied_volume_ignore (device);
}
}
label = libhal_volume_get_label (volume);
uuid = libhal_volume_get_uuid (volume);
} else {
label = NULL;
uuid = NULL;
}
bailout_if_in_fstab (hal_ctx, device, label, uuid);
/* TODO: sanity check that what hal exports is correct (cf. Martin Pitt's email) */
/* read from stdin */
if (strlen (fgets (mount_point, sizeof (mount_point), stdin)) > 0)
mount_point [strlen (mount_point) - 1] = '\0';
if (strlen (fgets (mount_fstype, sizeof (mount_fstype), stdin)) > 0)
mount_fstype [strlen (mount_fstype) - 1] = '\0';
if (strlen (fgets (mount_options, sizeof (mount_options), stdin)) > 0)
mount_options [strlen (mount_options) - 1] = '\0';
/* validate that input from stdin is UTF-8 */
if (!g_utf8_validate (mount_point, -1, &end))
unknown_error ("Error validating mount_point as UTF-8");
if (!g_utf8_validate (mount_fstype, -1, &end))
unknown_error ("Error validating mount_fstype as UTF-8");
if (!g_utf8_validate (mount_options, -1, &end))
unknown_error ("Error validating mount_options as UTF-8");
#ifdef sun
if (calling_uid != 0) {
#endif
for (i = 0; mount_point[i] != '\0'; i++) {
if (mount_point[i] == '\n' ||
mount_point[i] == G_DIR_SEPARATOR) {
unknown_error ("mount_point cannot contain the following characters: newline, G_DIR_SEPARATOR (usually /)");
}
}
#ifdef sun
}
is_abs_path = (mount_point[0] == G_DIR_SEPARATOR);
#endif
#ifdef DEBUG
printf ("mount_point = '%s'\n", mount_point);
printf ("mount_fstype = '%s'\n", mount_fstype);
printf ("mount_options = '%s'\n", mount_options);
#endif
/* delete any trailing whitespace options from splitting the string */
given_options = g_strsplit (mount_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;
}
#ifdef sun
/* for read-only media append 'ro' option if not already */
append_ro = libhal_device_get_property_bool (hal_ctx, libhal_drive_get_udi(drive),
"storage.removable.solaris.read_only", NULL);
if (append_ro) {
for (i = 0; i < (int) g_strv_length (given_options); i++) {
if (strcmp (given_options[i], "ro") == 0) {
append_ro = FALSE;
}
}
}
#endif /* sun */
/* is option 'remount' included? */
is_remount = FALSE;
for (i = 0; i < (int) g_strv_length (given_options); i++) {
if (strcmp (given_options[i], "remount") == 0) {
is_remount = TRUE;
}
}
mount_dir = NULL;
if (is_remount) {
if (volume != NULL) {
if (!libhal_volume_is_mounted (volume)) {
cannot_remount (device);
}
mount_dir = g_strdup (libhal_volume_get_mount_point (volume));
} else {
if (!device_is_mounted (device, &mount_dir)) {
cannot_remount (device);
}
}
if (mount_dir == NULL) {
unknown_error ("Cannot get mount_dir for remount even though volume is mounted!");
}
} else {
if (volume != NULL) {
if (libhal_volume_is_mounted (volume)) {
already_mounted (device);
}
} else {
if (device_is_mounted (device, NULL)) {
already_mounted (device);
}
}
}
if (!is_remount) {
/* figure out mount point if no mount point is given... */
explicit_mount_point_given = FALSE;
if (strlen (mount_point) == 0) {
char *p;
const char *label;
if (volume != NULL)
label = libhal_volume_get_label (volume);
else
label = NULL;
model = libhal_drive_get_model (drive);
drive_type = libhal_drive_get_type_textual (drive);
if (label != NULL) {
/* best - use label */
g_strlcpy (mount_point, label, sizeof (mount_point));
} else if ((model != NULL) && (strlen (model) > 0)) {
g_strlcpy (mount_point, model, sizeof (mount_point));
} else if ((drive_type != NULL) && (strlen (drive_type) > 0)) {
g_strlcpy (mount_point, drive_type, sizeof (mount_point));
} else {
/* fallback - use "disk" */
g_snprintf (mount_point, sizeof (mount_point), "disk");
}
/* sanitize computed mount point name, e.g. replace invalid chars with '-' */
p = mount_point;
while (TRUE) {
p = g_utf8_strchr (mount_point, -1, G_DIR_SEPARATOR);
if (p == NULL)
break;
*p = '-';
};
} else {
explicit_mount_point_given = TRUE;
}
/* check mount point name - only forbid separators */
#ifdef sun
if (calling_uid != 0) {
#endif
if (g_utf8_strchr (mount_point, -1, G_DIR_SEPARATOR) != NULL) {
printf ("'%s' is an invalid mount point\n", mount_point);
invalid_mount_point (mount_point);
}
#ifdef sun
}
#endif
/* check if mount point is available - append number to mount point */
i = 0;
mount_dir = NULL;
while (TRUE) {
g_free (mount_dir);
#ifdef sun
if (is_abs_path)
mount_dir = g_strdup (mount_point);
else
#endif
if (i == 0)
mount_dir = g_strdup_printf ("/media/%s", mount_point);
else
mount_dir = g_strdup_printf ("/media/%s-%d", mount_point, i);
#ifdef DEBUG
printf ("trying dir %s\n", mount_dir);
#endif
/* XXX should test for being a mount point */
if (!g_file_test (mount_dir, G_FILE_TEST_EXISTS)) {
break;
}
#ifdef sun
if (calling_uid == 0) {
break;
}
#endif
if (explicit_mount_point_given) {
mount_point_not_available (mount_dir);
}
i++;
}
}
dbus_error_init (&error);
allowed_options = libhal_device_get_property_strlist (hal_ctx, udi, "volume.mount.valid_options", &error);
if (dbus_error_is_set (&error)) {
unknown_error ("Cannot get volume.mount.valid_options");
dbus_error_free (&error);
}
#ifdef DEBUG
for (i = 0; given_options[i] != NULL; i++)
printf ("given_options[%d] = '%s'\n", i, given_options[i]);
for (i = 0; allowed_options[i] != NULL; i++)
printf ("allowed_options[%d] = '%s'\n", i, allowed_options[i]);
#endif
wants_to_change_uid = FALSE;
/* check mount options */
for (i = 0; given_options[i] != NULL; i++) {
char *given = given_options[i];
for (j = 0; allowed_options[j] != NULL; j++) {
char *allow = allowed_options[j];
int allow_len = strlen (allow);
if (strcmp (given, allow) == 0) {
goto option_ok;
}
if ((allow[allow_len - 1] == '=') &&
(strncmp (given, allow, allow_len) == 0) &&
(int) strlen (given) > allow_len) {
/* option matched allowed ending in '=', e.g.
* given == "umask=foobar" and allowed == "umask="
*/
if (strcmp (allow, "uid=") == 0) {
uid_t uid;
char *endp;
/* check for uid=, it requires special handling */
uid = (uid_t) strtol (given + allow_len, &endp, 10);
if (*endp != '\0') {
printf ("'%s' is not a number?\n", given);
unknown_error ("option uid is malformed");
}
#ifdef DEBUG
printf ("%s with uid %d\n", allow, uid);
#endif
wants_to_change_uid = TRUE;
goto option_ok;
} else {
goto option_ok;
}
}
}
/* apparently option was not ok */
invalid_mount_option (given, invoked_by_uid);
option_ok:
;
}
/* Check privilege */
pol_is_fixed = TRUE;
if (libhal_drive_is_hotpluggable (drive) || libhal_drive_uses_removable_media (drive))
pol_is_fixed = FALSE;
pol_change_uid = FALSE;
/* don't consider uid= on non-pollable drives for the purpose of policy
* (since these drives normally use vfat)
*/
if (volume != NULL) {
/* don't consider uid= on vfat, iso9660, udf change-uid for the purpose of policy
* (since these doesn't contain uid/gid bits)
*/
if (strcmp (libhal_volume_get_fstype (volume), "vfat") != 0 &&
strcmp (libhal_volume_get_fstype (volume), "iso9660") != 0 &&
strcmp (libhal_volume_get_fstype (volume), "udf") != 0) {
pol_change_uid = wants_to_change_uid;
}
}
if (pol_is_fixed) {
if (pol_change_uid) {
privilege = "hal-storage-fixed-mount-all-options";
} else {
privilege = "hal-storage-fixed-mount";
}
} else {
if (pol_change_uid) {
privilege = "hal-storage-removable-mount-all-options";
} else {
privilege = "hal-storage-removable-mount";
}
}
#ifdef DEBUG
printf ("using privilege %s for uid %s, system_bus_connection %s\n", privilege, invoked_by_uid,
invoked_by_syscon_name);
#endif
#ifdef HAVE_POLKIT
if (libpolkit_is_uid_allowed_for_privilege (pol_ctx,
invoked_by_syscon_name,
invoked_by_uid,
privilege,
udi,
&allowed_by_privilege,
&is_temporary_privilege,
NULL) != LIBPOLKIT_RESULT_OK) {
printf ("cannot lookup privilege\n");
unknown_error ("Cannot lookup privilege from PolicyKit");
}
if (!allowed_by_privilege) {
printf ("caller don't possess privilege\n");
permission_denied_privilege (privilege, invoked_by_uid);
}
#endif
#ifdef DEBUG
printf ("passed privilege\n");
#endif
if (!is_remount) {
/* create directory */
#ifdef sun
if (!g_file_test (mount_dir, G_FILE_TEST_EXISTS) &&
(g_mkdir (mount_dir, 0755) != 0)) {
#else
if (g_mkdir (mount_dir, 0700) != 0) {
#endif
printf ("Cannot create '%s'\n", mount_dir);
unknown_error ("Cannot create mount directory");
}
#ifdef __FreeBSD__
calling_uid = (uid_t) strtol (invoked_by_uid, (char **) NULL, 10);
pw = getpwuid (calling_uid);
if (pw != NULL) {
calling_gid = pw->pw_gid;
} else {
calling_gid = 0;
}
if (chown (mount_dir, calling_uid, calling_gid) != 0) {
printf ("Cannot chown '%s' to uid: %d, gid: %d\n", mount_dir,
calling_uid, calling_gid);
g_rmdir (mount_dir);
unknown_error ();
}
#endif
}
char *mount_option_commasep = NULL;
char *mount_do_fstype = "auto";
/* construct arguments to mount */
na = 0;
args[na++] = MOUNT;
if (strlen (mount_fstype) > 0) {
mount_do_fstype = (char *) map_fstype (mount_fstype);
} else if (volume == NULL) {
/* non-pollable drive; force auto */
mount_do_fstype = "auto";
} else if (libhal_volume_get_fstype (volume) != NULL && strlen (libhal_volume_get_fstype (volume)) > 0) {
mount_do_fstype = (char *) map_fstype (libhal_volume_get_fstype (volume));
}
args[na++] = MOUNT_TYPE_OPT;
args[na++] = mount_do_fstype;
args[na++] = "-o";
mount_option_str = g_string_new (MOUNT_OPTIONS);
for (i = 0; given_options[i] != NULL; i++) {
g_string_append (mount_option_str, ",");
g_string_append (mount_option_str, given_options[i]);
}
#ifdef sun
if (append_ro) {
g_string_append (mount_option_str, ",ro");
}
#endif
mount_option_commasep = g_string_free (mount_option_str, FALSE); /* leak! */
args[na++] = mount_option_commasep;
args[na++] = (char *) device;
args[na++] = mount_dir;
args[na++] = NULL;
/* TODO FIXME XXX HACK: OK, so we should rewrite the options in /media/.hal-mtab ..
* but it doesn't really matter much at this point */
if (!is_remount) {
FILE *hal_mtab;
char *mount_dir_escaped;
FILE *hal_mtab_orig;
int hal_mtab_orig_len;
int num_read;
char *hal_mtab_buf;
char *hal_mtab_buf_old;
/* Maintain a list in /media/.hal-mtab with entries of the following format
*
* <device_file>\t<uid>\t<session-id>\t<fstype>\t<options_sep_by_comma>\t<mount point>\n
*
* where session-id currently is unused and thus set to 0.
*
* Example:
*
* /dev/sda2 500 0 hfsplus noexec,nosuid,nodev /media/Macintosh HD
* /dev/sda4 500 0 ntfs noexec,nosuid,nodev,umask=222 /media/Windows
* /dev/sdb1 500 0 vfat noexec,nosuid,nodev,shortname=winnt,uid=500 /media/davidz
*/
if (g_file_test ("/media/.hal-mtab", G_FILE_TEST_EXISTS)) {
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);
} else {
hal_mtab_buf = g_strdup ("");
}
mount_dir_escaped = g_strescape (mount_dir, NULL);
#ifdef DEBUG
printf ("%d: XYA creating /media/.hal-mtab~\n", getpid ());
#endif
hal_mtab = fopen ("/media/.hal-mtab~", "w");
if (hal_mtab == NULL) {
unknown_error ("Cannot create /media/.hal-mtab~");
}
hal_mtab_buf_old = hal_mtab_buf;
hal_mtab_buf = g_strdup_printf ("%s%s\t%s\t0\t%s\t%s\t%s\n",
hal_mtab_buf_old,
device, invoked_by_uid, mount_do_fstype,
mount_option_commasep, mount_dir_escaped);
g_free (hal_mtab_buf_old);
if (hal_mtab_buf_old == NULL) {
unknown_error ("Out of memory appending to /media/.hal-mtab~");
}
if (fwrite (hal_mtab_buf, 1, strlen (hal_mtab_buf), hal_mtab) != strlen (hal_mtab_buf)) {
unknown_error ("Cannot write to /media/.hal-mtab~");
}
fclose (hal_mtab);
g_free (hal_mtab_buf);
g_free (mount_dir_escaped);
#ifdef DEBUG
printf ("%d: XYA closing /media/.hal-mtab~\n", getpid ());
#endif
} /* !is_remount */
/* now try to mount */
if (!g_spawn_sync ("/",
args,
NULL,
0,
NULL,
NULL,
&sout,
&serr,
&exit_status,
&err)) {
printf ("Cannot execute %s\n", MOUNT);
g_rmdir (mount_dir);
unlink ("/media/.hal-mtab~");
unknown_error ("Cannot spawn " MOUNT);
}
if (exit_status != 0) {
char errstr[] = "mount: unknown filesystem type";
printf ("%s error %d, stdout='%s', stderr='%s'\n", MOUNT, exit_status, sout, serr);
if (!is_remount) {
g_rmdir (mount_dir);
unlink ("/media/.hal-mtab~");
}
if (strncmp (errstr, serr, sizeof (errstr) - 1) == 0) {
unknown_filesystem (strlen (mount_fstype) > 0 ?
mount_fstype :
(volume != NULL ? libhal_volume_get_fstype (volume) : "") );
} else {
int n;
for (n = 0; serr[n] != '\0'; n++) {
if (serr[n] == '\n') {
serr[n] = ' ';
}
}
unknown_error (serr);
}
}
if (!is_remount) {
if (rename ("/media/.hal-mtab~", "/media/.hal-mtab") != 0) {
printf ("rename(2) failed, errno=%d -> '%s'\n", errno, strerror (errno));
unlink ("/media/.hal-mtab~");
#ifdef DEBUG
printf ("%d: XYA failed renaming /media/.hal-mtab~ to /media/.hal-mtab\n", getpid ());
#endif
unknown_error ("Cannot rename /media/.hal-mtab~ to /media/.hal-mtab");
}
#ifdef DEBUG
printf ("%d: XYA done renaming /media/.hal-mtab~ to /media/.hal-mtab\n", getpid ());
#endif
}
openlog ("hald", 0, LOG_DAEMON);
if (is_remount) {
syslog (LOG_INFO, "remounted %s at '%s' on behalf of uid %s", device, mount_dir, invoked_by_uid);
} else {
syslog (LOG_INFO, "mounted %s on behalf of uid %s", device, invoked_by_uid);
}
closelog ();
#ifdef sun
if ((adt_data = get_audit_export_data (system_bus,
invoked_by_syscon_name, &adt_data_size)) != NULL) {
audit_volume (adt_data, ADT_attach,
WEXITSTATUS(exit_status), auth_from_privilege(privilege),
mount_dir, device, mount_option_commasep);
free (adt_data);
}
#endif
g_free (sout);
g_free (serr);
g_free (mount_dir);
libhal_free_string_array (allowed_options);
g_strfreev (given_options);
}
int
main (int argc, char *argv[])
{
char *udi;
char *device;
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;
if (!lock_hal_mtab ()) {
unknown_error ("Cannot obtain lock on /media/.hal-mtab");
}
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_error ("Cannot get libpolkit context");
}
#endif
volume = libhal_volume_from_udi (hal_ctx, udi);
if (volume == NULL) {
LibHalDrive *drive;
drive = libhal_drive_from_udi (hal_ctx, udi);
if (drive == NULL) {
usage ();
} else {
handle_mount (hal_ctx,
#ifdef HAVE_POLKIT
pol_ctx,
#endif
udi, NULL, drive, device, invoked_by_uid,
invoked_by_syscon_name, system_bus);
}
} else {
const char *drive_udi;
LibHalDrive *drive;
drive_udi = libhal_volume_get_storage_device_udi (volume);
if (drive_udi == NULL)
unknown_error ("Cannot get drive_udi from volume");
drive = libhal_drive_from_udi (hal_ctx, drive_udi);
if (drive == NULL)
unknown_error ("Cannot get drive from hal");
handle_mount (hal_ctx,
#ifdef HAVE_POLKIT
pol_ctx,
#endif
udi, volume, drive, device, invoked_by_uid,
invoked_by_syscon_name, system_bus);
}
unlock_hal_mtab ();
return 0;
}