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/***************************************************************************
* CVSID: $Id: hal-storage-mount.c,v 1.7 2006/06/21 00:44:03 david Exp $
*
* hal-storage-cleanup-all-mountpoints.c : Cleanup all mount points in
* /media/.hal-mtab that is currently unused
*
* 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 (void)
{
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;
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 */
for (i = 0; lines[i] != NULL; 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) {
char *mount_point;
#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
/* just try to rmdir the entry; if it's non-empty or something is mounted on it,
* this will fail
*/
mount_point = line_elements[5];
/* remove directory */
if (g_rmdir (mount_point) == 0) {
char *line_to_free;
printf ("Removed mount_point '%s'", mount_point);
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);
/* we've moved the lines one back, so make sure we don't advance to next line */
i--;
}
}
g_strfreev (line_elements);
}
/* create new .hal-mtab~ file without the entries we've removed */
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 (strlen (lines[i]) > 0) {
char anewl[2] = "\n\0";
if (fwrite (lines[i], 1, strlen (lines[i]), hal_mtab_new) != strlen (lines[i])) {
unknown_error ("Cannot write to /media/.hal-mtab~");
}
if (fwrite (anewl, 1, 1, hal_mtab_new) != 1) {
unknown_error ("Cannot write to /media/.hal-mtab~");
}
}
}
fclose (hal_mtab_new);
g_strfreev (lines);
/* 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");
}
}
int
main (int argc, char *argv[])
{
if (!lock_hal_mtab ()) {
unknown_error ("Cannot obtain lock on /media/.hal-mtab");
}
if (getenv ("HAL_PROP_INFO_UDI") == NULL)
usage ();
#ifdef DEBUG
printf ("in hal-storage-cleanup-all-mountpoints\n");
#endif
do_cleanup ();
unlock_hal_mtab ();
return 0;
}
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