1 /*************************************************************************** 2 * CVSID: $Id: hal-storage-mount.c,v 1.7 2006/06/21 00:44:03 david Exp $ 3 * 4 * hal-storage-cleanup-all-mountpoints.c : Cleanup all mount points in 5 * /media/.hal-mtab that is currently unused 6 * 7 * Copyright (C) 2006 David Zeuthen, <david@fubar.dk> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * 23 **************************************************************************/ 24 25 #ifdef HAVE_CONFIG_H 26 # include <config.h> 27 #endif 28 29 #include <unistd.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <glib.h> 34 #include <glib/gstdio.h> 35 36 #include "hal-storage-shared.h" 37 38 /*#define DEBUG*/ 39 #define DEBUG 40 41 static void 42 usage (void) 43 { 44 fprintf (stderr, "This program should only be started by hald.\n"); 45 exit (1); 46 } 47 48 static void 49 do_cleanup (void) 50 { 51 int i, j; 52 FILE *hal_mtab_orig; 53 int hal_mtab_orig_len; 54 int num_read; 55 char *hal_mtab_buf; 56 char **lines; 57 FILE *hal_mtab_new; 58 59 hal_mtab_orig = fopen ("/media/.hal-mtab", "r"); 60 if (hal_mtab_orig == NULL) { 61 unknown_error ("Cannot open /media/.hal-mtab"); 62 } 63 if (fseek (hal_mtab_orig, 0L, SEEK_END) != 0) { 64 unknown_error ("Cannot seek to end of /media/.hal-mtab"); 65 } 66 hal_mtab_orig_len = ftell (hal_mtab_orig); 67 if (hal_mtab_orig_len < 0) { 68 unknown_error ("Cannot determine size of /media/.hal-mtab"); 69 } 70 rewind (hal_mtab_orig); 71 hal_mtab_buf = g_new0 (char, hal_mtab_orig_len + 1); 72 num_read = fread (hal_mtab_buf, 1, hal_mtab_orig_len, hal_mtab_orig); 73 if (num_read != hal_mtab_orig_len) { 74 unknown_error ("Cannot read from /media/.hal-mtab"); 75 } 76 fclose (hal_mtab_orig); 77 78 #ifdef DEBUG 79 printf ("hal_mtab = '%s'\n", hal_mtab_buf); 80 #endif 81 82 lines = g_strsplit (hal_mtab_buf, "\n", 0); 83 g_free (hal_mtab_buf); 84 85 /* find the entry we're going to unmount */ 86 for (i = 0; lines[i] != NULL; i++) { 87 char **line_elements; 88 89 #ifdef DEBUG 90 printf (" line = '%s'\n", lines[i]); 91 #endif 92 93 if ((lines[i])[0] == '#') 94 continue; 95 96 line_elements = g_strsplit (lines[i], "\t", 6); 97 if (g_strv_length (line_elements) == 6) { 98 char *mount_point; 99 100 #ifdef DEBUG 101 printf (" devfile = '%s'\n", line_elements[0]); 102 printf (" uid = '%s'\n", line_elements[1]); 103 printf (" session id = '%s'\n", line_elements[2]); 104 printf (" fs = '%s'\n", line_elements[3]); 105 printf (" options = '%s'\n", line_elements[4]); 106 printf (" mount_point = '%s'\n", line_elements[5]); 107 #endif 108 109 /* just try to rmdir the entry; if it's non-empty or something is mounted on it, 110 * this will fail 111 */ 112 mount_point = line_elements[5]; 113 114 /* remove directory */ 115 if (g_rmdir (mount_point) == 0) { 116 char *line_to_free; 117 118 printf ("Removed mount_point '%s'", mount_point); 119 120 line_to_free = lines[i]; 121 for (j = i; lines[j] != NULL; j++) { 122 lines[j] = lines[j+1]; 123 } 124 lines[j] = NULL; 125 g_free (line_to_free); 126 127 /* we've moved the lines one back, so make sure we don't advance to next line */ 128 i--; 129 } 130 } 131 132 g_strfreev (line_elements); 133 } 134 135 /* create new .hal-mtab~ file without the entries we've removed */ 136 hal_mtab_new = fopen ("/media/.hal-mtab~", "w"); 137 if (hal_mtab_new == NULL) { 138 unknown_error ("Cannot create /media/.hal-mtab~"); 139 } 140 for (i = 0; lines[i] != NULL; i++) { 141 if (strlen (lines[i]) > 0) { 142 char anewl[2] = "\n\0"; 143 if (fwrite (lines[i], 1, strlen (lines[i]), hal_mtab_new) != strlen (lines[i])) { 144 unknown_error ("Cannot write to /media/.hal-mtab~"); 145 } 146 if (fwrite (anewl, 1, 1, hal_mtab_new) != 1) { 147 unknown_error ("Cannot write to /media/.hal-mtab~"); 148 } 149 } 150 } 151 fclose (hal_mtab_new); 152 153 g_strfreev (lines); 154 155 /* set new .hal-mtab file */ 156 if (rename ("/media/.hal-mtab~", "/media/.hal-mtab") != 0) { 157 unlink ("/media/.hal-mtab~"); 158 unknown_error ("Cannot rename /media/.hal-mtab~ to /media/.hal-mtab"); 159 } 160 } 161 162 int 163 main (int argc, char *argv[]) 164 { 165 if (!lock_hal_mtab ()) { 166 unknown_error ("Cannot obtain lock on /media/.hal-mtab"); 167 } 168 169 if (getenv ("HAL_PROP_INFO_UDI") == NULL) 170 usage (); 171 172 #ifdef DEBUG 173 printf ("in hal-storage-cleanup-all-mountpoints\n"); 174 #endif 175 do_cleanup (); 176 177 178 unlock_hal_mtab (); 179 return 0; 180 } 181