ext2ed/init.c

   1 /*
   2
   3 /usr/src/ext2ed/init.c
   4
   5 A part of the extended file system 2 disk editor.
   6
   7 --------------------------------
   8 Various initialization routines.
   9 --------------------------------
  10
  11 First written on: April 9 1995
  12
  13 Copyright (C) 1995 Gadi Oxman
  14
  15 */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #ifdef HAVE_READLINE
  21 #include <readline.h>
  22 #endif
  23 #include <signal.h>
  24 #include <unistd.h>
  25
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <fcntl.h>
  29
  30 #include "ext2ed.h"
  31
  32 char lines_s [80],cols_s [80];
  33
  34 void signal_handler (void);
  35
  36 void prepare_to_close (void)
  37
  38 {
  39         close_windows ();
  40         if (device_handle!=NULL)
  41                 fclose (device_handle);
  42         free_user_commands (&general_commands);
  43         free_user_commands (&ext2_commands);
  44         free_struct_descriptors ();
  45 }
  46
  47 int init (void)
  48
  49 {
  50         printf ("Initializing ...\n");
  51
  52         if (!process_configuration_file ()) {
  53                 fprintf (stderr,"Error - Unable to complete configuration. Quitting.\n");
  54                 return (0);
  55         };
  56
  57         general_commands.last_command=-1;       /* No commands whatsoever meanwhile */
  58         ext2_commands.last_command=-1;
  59         add_general_commands ();                /* Add the general commands, aviable always */
  60         device_handle=NULL;                     /* Notice that our device is still not set up */
  61         device_offset=-1;
  62         current_type=NULL;                      /* No filesystem specific types yet */
  63
  64         remember_lifo.entries_count=0;          /* Object memory is empty */
  65
  66         init_windows ();                        /* Initialize the NCURSES interface */
  67         init_readline ();                       /* Initialize the READLINE interface */
  68         init_signals ();                        /* Initialize the signal handlers */
  69         write_access=0;                         /* Write access disabled */
  70
  71         strcpy (last_command_line,"help");      /* Show the help screen to the user */
  72         dispatch ("help");
  73         return (1);                             /* Success */
  74 }
  75
  76 void add_general_commands (void)
  77
  78 {
  79         add_user_command (&general_commands,"help","EXT2ED help system",help);
  80         add_user_command (&general_commands,"set","Changes a variable in the current object",set);
  81         add_user_command (&general_commands,"setdevice","Selects the filesystem block device (e.g. /dev/hda1)",set_device);
  82         add_user_command (&general_commands,"setoffset","Moves asynchronicly in the filesystem",set_offset);
  83         add_user_command (&general_commands,"settype","Tells EXT2ED how to interpert the current object",set_type);
  84         add_user_command (&general_commands,"show","Displays the current object",show);
  85         add_user_command (&general_commands,"pgup","Scrolls data one page up",pgup);
  86         add_user_command (&general_commands,"pgdn","Scrolls data one page down",pgdn);
  87         add_user_command (&general_commands,"redraw","Redisplay the screen",redraw);
  88         add_user_command (&general_commands,"remember","Saves the current position and data information",remember);
  89         add_user_command (&general_commands,"recall","Gets back to the saved object position",recall);
  90         add_user_command (&general_commands,"enablewrite","Enters Read/Write mode - Allows changing the filesystem",enable_write);
  91         add_user_command (&general_commands,"disablewrite","Enters read only mode",disable_write);
  92         add_user_command (&general_commands,"writedata","Write data back to disk",write_data);
  93         add_user_command (&general_commands,"next","Moves to the next byte in hex mode",next);
  94         add_user_command (&general_commands,"prev","Moves to the previous byte in hex mode",prev);
  95 }
  96
  97 void add_ext2_general_commands (void)
  98
  99 {
 100         add_user_command (&ext2_commands,"super","Moves to the superblock of the filesystem",type_ext2___super);
 101         add_user_command (&ext2_commands,"group","Moves to the first group descriptor",type_ext2___group);
 102         add_user_command (&ext2_commands,"cd","Moves to the directory specified",type_ext2___cd);
 103 }
 104
 105 int set_struct_descriptors (char *file_name)
 106
 107 {
 108         FILE *fp;
 109         char current_line [500],current_word [50],*ch;
 110         char variable_name [50],variable_type [20];
 111         struct struct_descriptor *current_descriptor;
 112
 113         if ( (fp=fopen (file_name,"rt"))==NULL) {
 114                 wprintw (command_win,"Error - Failed to open descriptors file %s\n",file_name);
 115                 refresh_command_win (); return (0);
 116         };
 117
 118         while (!feof (fp)) {
 119                 fgets (current_line,500,fp);
 120                 if (feof (fp)) break;
 121                 ch=parse_word (current_line,current_word);
 122                 if (strcmp (current_word,"struct")==0) {
 123                         ch=parse_word (ch,current_word);
 124                         current_descriptor=add_new_descriptor (current_word);
 125
 126                         while (strchr (current_line,'{')==NULL) {
 127                                 fgets (current_line,500,fp);
 128                                 if (feof (fp)) break;
 129                         };
 130                         if (feof (fp)) break;
 131
 132                         fgets (current_line,500,fp);
 133
 134                         while (strchr (current_line,'}')==NULL) {
 135                                 while (strchr (current_line,';')==NULL) {
 136                                         fgets (current_line,500,fp);
 137                                         if (strchr (current_line,'}')!=NULL) break;
 138                                 };
 139                                 if (strchr (current_line,'}') !=NULL) break;
 140                                 ch=parse_word (current_line,variable_type);
 141                                 ch=parse_word (ch,variable_name);
 142                                 while (variable_name [strlen (variable_name)-1]!=';') {
 143                                         strcpy (variable_type,variable_name);
 144                                         ch=parse_word (ch,variable_name);
 145                                 };
 146                                 variable_name [strlen (variable_name)-1]=0;
 147                                 add_new_variable (current_descriptor,variable_type,variable_name);
 148                                 fgets (current_line,500,fp);
 149                         };
 150                 };
 151         };
 152
 153         fclose (fp);
 154         return (1);
 155 }
 156
 157 void free_struct_descriptors (void)
 158
 159 {
 160         struct struct_descriptor *ptr,*next;
 161
 162         ptr=first_type;
 163         while (ptr!=NULL) {
 164                 next=ptr->next;
 165                 free_user_commands (&ptr->type_commands);
 166                 free (ptr);
 167                 ptr=next;
 168         }
 169         first_type=last_type=current_type=NULL;
 170 }
 171
 172 void free_user_commands (struct struct_commands *ptr)
 173
 174 {
 175         int i;
 176
 177         for (i=0;i<=ptr->last_command;i++) {
 178                 free (ptr->names [i]);
 179                 free (ptr->descriptions [i]);
 180         }
 181
 182         ptr->last_command=-1;
 183 }
 184
 185 struct struct_descriptor *add_new_descriptor (char *name)
 186
 187 {
 188         struct struct_descriptor *ptr;
 189
 190         ptr = malloc (sizeof (struct struct_descriptor));
 191         if (ptr == NULL) {
 192                 printf ("Error - Can not allocate memory - Quitting\n");
 193                 exit (1);
 194         }
 195         memset(ptr, 0, sizeof(struct struct_descriptor));
 196         ptr->prev = ptr->next = NULL;
 197         strcpy (ptr->name,name);
 198         ptr->length=0;
 199         ptr->fields_num=0;
 200         if (first_type==NULL) {
 201                 first_type = last_type = ptr;
 202         } else {
 203                 ptr->prev = last_type; last_type->next = ptr; last_type=ptr;
 204         }
 205         ptr->type_commands.last_command=-1;
 206         fill_type_commands (ptr);
 207         return (ptr);
 208 }
 209
 210 struct type_table {
 211         char    *name;
 212         int     field_type;
 213         int     len;
 214 };
 215
 216 struct type_table type_table[] = {
 217         { "long",   FIELD_TYPE_INT,     4 },
 218         { "short",  FIELD_TYPE_INT,     2 },
 219         { "char",   FIELD_TYPE_CHAR,    1 },
 220         { "__u32",  FIELD_TYPE_UINT,    4 },
 221         { "__s32",  FIELD_TYPE_INT,     4 },
 222         { "__u16",  FIELD_TYPE_UINT,    2 },
 223         { "__s16",  FIELD_TYPE_INT,     2 },
 224         { "__u8",   FIELD_TYPE_UINT,    1 },
 225         { "__s8",   FIELD_TYPE_INT,     1 },
 226         {  0,       0,                  0 }
 227 };
 228
 229 void add_new_variable (struct struct_descriptor *ptr,char *v_type,char *v_name)
 230
 231 {
 232         short   len=1;
 233         char    field_type=FIELD_TYPE_INT;
 234         struct type_table *p;
 235
 236         strcpy (ptr->field_names [ptr->fields_num],v_name);
 237         ptr->field_positions [ptr->fields_num]=ptr->length;
 238
 239         for (p = type_table; p->name; p++) {
 240                 if (strcmp(v_type, p->name) == 0) {
 241                         len = p->len;
 242                         field_type = p->field_type;
 243                         break;
 244                 }
 245         }
 246         if (p->name == 0) {
 247                 if (strncmp(v_type, "char[", 5) == 0) {
 248                         len = atoi(v_type+5);
 249                         field_type = FIELD_TYPE_CHAR;
 250                 } else {
 251                         printf("Unknown type %s for field %s\n", v_type, v_name);
 252                         exit(1);
 253                 }
 254         }
 255
 256         ptr->field_lengths [ptr->fields_num] = len;
 257         ptr->field_types [ptr->fields_num] = field_type;
 258
 259         ptr->length+=len;
 260         ptr->fields_num++;
 261 }
 262
 263 void fill_type_commands (struct struct_descriptor *ptr)
 264
 265 /*
 266
 267 Set specific type user commands.
 268
 269 */
 270
 271 {
 272
 273         if (strcmp ((ptr->name),"file")==0) {
 274                 add_user_command (&ptr->type_commands,"show","Shows file data",type_file___show);
 275                 add_user_command (&ptr->type_commands,"inode","Returns to the inode of the current file",type_file___inode);
 276                 add_user_command (&ptr->type_commands,"display","Specifies data format - text or hex",type_file___display);
 277                 add_user_command (&ptr->type_commands,"next","Pass to next byte",type_file___next);
 278                 add_user_command (&ptr->type_commands,"prev","Pass to the previous byte",type_file___prev);
 279                 add_user_command (&ptr->type_commands,"offset","Pass to a specified byte in the current block",type_file___offset);
 280                 add_user_command (&ptr->type_commands,"nextblock","Pass to next file block",type_file___nextblock);
 281                 add_user_command (&ptr->type_commands,"prevblock","Pass to the previous file block",type_file___prevblock);
 282                 add_user_command (&ptr->type_commands,"block","Specify which file block to edit",type_file___block);
 283                 add_user_command (&ptr->type_commands,"remember","Saves the file\'s inode position for later reference",type_file___remember);
 284                 add_user_command (&ptr->type_commands,"set","Sets the current byte",type_file___set);
 285                 add_user_command (&ptr->type_commands,"writedata","Writes the current block to the disk",type_file___writedata);
 286         }
 287
 288         if (strcmp ((ptr->name),"ext2_inode")==0) {
 289                 add_user_command (&ptr->type_commands,"show","Shows inode data",type_ext2_inode___show);
 290                 add_user_command (&ptr->type_commands,"next","Move to next inode in current block group",type_ext2_inode___next);
 291                 add_user_command (&ptr->type_commands,"prev","Move to next inode in current block group",type_ext2_inode___prev);
 292                 add_user_command (&ptr->type_commands,"group","Move to the group descriptors of the current inode table",type_ext2_inode___group);
 293                 add_user_command (&ptr->type_commands,"entry","Move to a specified entry in the current inode table",type_ext2_inode___entry);
 294                 add_user_command (&ptr->type_commands,"file","Display file data of the current inode",type_ext2_inode___file);
 295                 add_user_command (&ptr->type_commands,"dir","Display directory data of the current inode",type_ext2_inode___dir);
 296         }
 297
 298         if (strcmp ((ptr->name),"dir")==0) {
 299                 add_user_command (&ptr->type_commands,"show","Shows current directory data",type_dir___show);
 300                 add_user_command (&ptr->type_commands,"inode","Returns to the inode of the current directory",type_dir___inode);
 301                 add_user_command (&ptr->type_commands,"next","Pass to the next directory entry",type_dir___next);
 302                 add_user_command (&ptr->type_commands,"prev","Pass to the previous directory entry",type_dir___prev);
 303                 add_user_command (&ptr->type_commands,"followinode","Follows the inode specified in this directory entry",type_dir___followinode);
 304                 add_user_command (&ptr->type_commands,"remember","Remember the inode of the current directory entry",type_dir___remember);
 305                 add_user_command (&ptr->type_commands,"cd","Changes directory relative to the current directory",type_dir___cd);
 306                 add_user_command (&ptr->type_commands,"entry","Moves to a specified entry in the current directory",type_dir___entry);
 307                 add_user_command (&ptr->type_commands,"writedata","Writes the current entry to the disk",type_dir___writedata);
 308                 add_user_command (&ptr->type_commands,"set","Changes a variable in the current directory entry",type_dir___set);
 309         }
 310
 311         if (strcmp ((ptr->name),"ext2_super_block")==0) {
 312                 add_user_command (&ptr->type_commands,"show","Displays the super block data",type_ext2_super_block___show);
 313                 add_user_command (&ptr->type_commands,"gocopy","Move to another backup copy of the superblock",type_ext2_super_block___gocopy);
 314                 add_user_command (&ptr->type_commands,"setactivecopy","Copies the current superblock to the main superblock",type_ext2_super_block___setactivecopy);
 315         }
 316
 317         if (strcmp ((ptr->name),"ext2_group_desc")==0) {
 318                 add_user_command (&ptr->type_commands,"next","Pass to the next block group decriptor",type_ext2_group_desc___next);
 319                 add_user_command (&ptr->type_commands,"prev","Pass to the previous group descriptor",type_ext2_group_desc___prev);
 320                 add_user_command (&ptr->type_commands,"entry","Pass to a specific group descriptor",type_ext2_group_desc___entry);
 321                 add_user_command (&ptr->type_commands,"show","Shows the current group descriptor",type_ext2_group_desc___show);
 322                 add_user_command (&ptr->type_commands,"inode","Pass to the inode table of the current group block",type_ext2_group_desc___inode);
 323                 add_user_command (&ptr->type_commands,"gocopy","Move to another backup copy of the group descriptor",type_ext2_group_desc___gocopy);
 324                 add_user_command (&ptr->type_commands,"blockbitmap","Show the block allocation bitmap of the current group block",type_ext2_group_desc___blockbitmap);
 325                 add_user_command (&ptr->type_commands,"inodebitmap","Show the inode allocation bitmap of the current group block",type_ext2_group_desc___inodebitmap);
 326                 add_user_command (&ptr->type_commands,"setactivecopy","Copies the current group descriptor to the main table",type_ext2_super_block___setactivecopy);
 327         }
 328
 329         if (strcmp ((ptr->name),"block_bitmap")==0) {
 330                 add_user_command (&ptr->type_commands,"show","Displays the block allocation bitmap",type_ext2_block_bitmap___show);
 331                 add_user_command (&ptr->type_commands,"entry","Moves to a specific bit",type_ext2_block_bitmap___entry);
 332                 add_user_command (&ptr->type_commands,"next","Moves to the next bit",type_ext2_block_bitmap___next);
 333                 add_user_command (&ptr->type_commands,"prev","Moves to the previous bit",type_ext2_block_bitmap___prev);
 334                 add_user_command (&ptr->type_commands,"allocate","Allocates the current block",type_ext2_block_bitmap___allocate);
 335                 add_user_command (&ptr->type_commands,"deallocate","Deallocates the current block",type_ext2_block_bitmap___deallocate);
 336         }
 337
 338         if (strcmp ((ptr->name),"inode_bitmap")==0) {
 339                 add_user_command (&ptr->type_commands,"show","Displays the inode allocation bitmap",type_ext2_inode_bitmap___show);
 340                 add_user_command (&ptr->type_commands,"entry","Moves to a specific bit",type_ext2_inode_bitmap___entry);
 341                 add_user_command (&ptr->type_commands,"next","Moves to the next bit",type_ext2_inode_bitmap___next);
 342                 add_user_command (&ptr->type_commands,"prev","Moves to the previous bit",type_ext2_inode_bitmap___prev);
 343                 add_user_command (&ptr->type_commands,"allocate","Allocates the current inode",type_ext2_inode_bitmap___allocate);
 344                 add_user_command (&ptr->type_commands,"deallocate","Deallocates the current inode",type_ext2_inode_bitmap___deallocate);
 345         }
 346
 347 }
 348
 349 void add_user_command (struct struct_commands *ptr,char *name,char *description,PF callback)
 350
 351 {
 352         int num;
 353
 354         num=ptr->last_command;
 355         if (num+1==MAX_COMMANDS_NUM) {
 356                 printf ("Internal Error - Can't add command %s\n",name);
 357                 return;
 358         }
 359
 360         ptr->last_command=++num;
 361
 362         ptr->names [num]=(char *) malloc (strlen (name)+1);
 363         strcpy (ptr->names [num],name);
 364
 365         if (*description!=0) {
 366                 ptr->descriptions [num]=(char *) malloc (strlen (description)+1);
 367                 strcpy (ptr->descriptions [num],description);
 368         }
 369
 370         ptr->callback [num]=callback;
 371 }
 372
 373 int set_file_system_info (void)
 374
 375 {
 376         int ext2_detected=0;
 377         struct ext2_super_block *sb;
 378
 379         file_system_info.super_block_offset=1024;
 380         file_system_info.file_system_size=DefaultTotalBlocks*DefaultBlockSize;
 381
 382         low_read ((char *) &file_system_info.super_block,sizeof (struct ext2_super_block),file_system_info.super_block_offset);
 383
 384         sb=&file_system_info.super_block;
 385
 386         if (sb->s_magic == EXT2_SUPER_MAGIC)
 387                 ext2_detected=1;
 388
 389         if (ext2_detected)
 390                 wprintw (command_win,"Detected extended 2 file system on device %s\n",device_name);
 391         else
 392                 wprintw (command_win,"Warning - Extended 2 filesystem not detected on device %s\n",device_name);
 393
 394         if (!ext2_detected && !ForceExt2)
 395                 wprintw (command_win,"You may wish to use the configuration option ForceExt2 on\n");
 396
 397         if (ForceExt2 && !ext2_detected)
 398                 wprintw (command_win,"Forcing extended 2 filesystem\n");
 399
 400         if (ForceDefault || !ext2_detected)
 401                 wprintw (command_win,"Forcing default parameters\n");
 402
 403         refresh_command_win ();
 404
 405         if (ext2_detected || ForceExt2) {
 406                 add_ext2_general_commands ();
 407                 if (!set_struct_descriptors (Ext2Descriptors))
 408                         return (0);
 409         }
 410
 411         if (!ForceDefault && ext2_detected) {
 412
 413                 file_system_info.block_size=EXT2_MIN_BLOCK_SIZE << sb->s_log_block_size;
 414                 if (file_system_info.block_size == EXT2_MIN_BLOCK_SIZE)
 415                         file_system_info.first_group_desc_offset=2*EXT2_MIN_BLOCK_SIZE;
 416                 else
 417                         file_system_info.first_group_desc_offset=file_system_info.block_size;
 418                 file_system_info.groups_count = ext2fs_div64_ceil(ext2fs_blocks_count(sb),
 419                                                  sb->s_blocks_per_group);
 420
 421                 file_system_info.inodes_per_block=file_system_info.block_size/sizeof (struct ext2_inode);
 422                 file_system_info.blocks_per_group=sb->s_inodes_per_group/file_system_info.inodes_per_block;
 423                 file_system_info.no_blocks_in_group=sb->s_blocks_per_group;
 424                 file_system_info.file_system_size=(ext2fs_blocks_count(sb)-1)*file_system_info.block_size;
 425         }
 426
 427         else {
 428                 file_system_info.file_system_size=DefaultTotalBlocks*DefaultBlockSize;
 429                 file_system_info.block_size=DefaultBlockSize;
 430                 file_system_info.no_blocks_in_group=DefaultBlocksInGroup;
 431         }
 432
 433         if (file_system_info.file_system_size > 2147483647) {
 434                 wprintw (command_win,"Sorry, filesystems bigger than 2 GB are currently not supported\n");
 435                 return (0);
 436         }
 437         return (1);
 438 }
 439
 440 void init_readline (void)
 441
 442 {
 443 #ifdef HAVE_READLINE
 444         rl_completion_entry_function=(Function *) complete_command;
 445 #endif
 446 }
 447
 448 void init_signals (void)
 449
 450 {
 451         signal (SIGWINCH, signal_SIGWINCH_handler);     /* Catch SIGWINCH */
 452         signal (SIGTERM, signal_SIGTERM_handler);
 453         signal (SIGSEGV, signal_SIGSEGV_handler);
 454
 455 }
 456
 457 void signal_SIGWINCH_handler (int sig_num)
 458
 459 {
 460         redraw_request=1;       /* We will handle it in main.c */
 461
 462         /* Reset signal handler */
 463         signal (SIGWINCH, signal_SIGWINCH_handler);
 464
 465 }
 466
 467 void signal_SIGTERM_handler (int sig_num)
 468
 469 {
 470         prepare_to_close ();
 471         printf ("Terminated due to signal %d\n",sig_num);
 472         exit (1);
 473 }
 474
 475 void signal_SIGSEGV_handler (int sig_num)
 476
 477 {
 478         prepare_to_close ();
 479         printf ("Killed by signal %d!\n",sig_num);
 480         exit (1);
 481 }
 482
 483 int process_configuration_file (void)
 484
 485 {
 486         char buffer [300];
 487         char option [80],value [80];
 488         FILE *fp;
 489
 490         strcpy (buffer, ROOT_SYSCONFDIR);
 491         strcat (buffer,"/ext2ed.conf");
 492
 493         if ((fp=fopen (buffer,"rt"))==NULL) {
 494                 fprintf (stderr,"Error - Unable to open configuration file %s\n",buffer);
 495                 return (0);
 496         }
 497
 498         while (get_next_option (fp,option,value)) {
 499                 if (strcasecmp (option,"Ext2Descriptors")==0) {
 500                         strcpy (Ext2Descriptors,value);
 501                 }
 502
 503                 else if (strcasecmp (option,"AlternateDescriptors")==0) {
 504                         strcpy (AlternateDescriptors,value);
 505                 }
 506
 507                 else if (strcasecmp (option,"LogFile")==0) {
 508                         strcpy (LogFile,value);
 509                 }
 510
 511                 else if (strcasecmp (option,"LogChanges")==0) {
 512                         if (strcasecmp (value,"on")==0)
 513                                 LogChanges = 1;
 514                         else if (strcasecmp (value,"off")==0)
 515                                 LogChanges = 0;
 516                         else {
 517                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 518                                 fclose (fp);return (0);
 519                         }
 520                 }
 521
 522                 else if (strcasecmp (option,"AllowChanges")==0) {
 523                         if (strcasecmp (value,"on")==0)
 524                                 AllowChanges = 1;
 525                         else if (strcasecmp (value,"off")==0)
 526                                 AllowChanges = 0;
 527                         else {
 528                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 529                                 fclose (fp);return (0);
 530                         }
 531                 }
 532
 533                 else if (strcasecmp (option,"AllowMountedRead")==0) {
 534                         if (strcasecmp (value,"on")==0)
 535                                 AllowMountedRead = 1;
 536                         else if (strcasecmp (value,"off")==0)
 537                                 AllowMountedRead = 0;
 538                         else {
 539                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 540                                 fclose (fp);return (0);
 541                         }
 542                 }
 543
 544                 else if (strcasecmp (option,"ForceExt2")==0) {
 545                         if (strcasecmp (value,"on")==0)
 546                                 ForceExt2 = 1;
 547                         else if (strcasecmp (value,"off")==0)
 548                                 ForceExt2 = 0;
 549                         else {
 550                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 551                                 fclose (fp);return (0);
 552                         }
 553                 }
 554
 555                 else if (strcasecmp (option,"DefaultBlockSize")==0) {
 556                         DefaultBlockSize = atoi (value);
 557                 }
 558
 559                 else if (strcasecmp (option,"DefaultTotalBlocks")==0) {
 560                         DefaultTotalBlocks = strtoul (value,NULL,10);
 561                 }
 562
 563                 else if (strcasecmp (option,"DefaultBlocksInGroup")==0) {
 564                         DefaultBlocksInGroup = strtoul (value,NULL,10);
 565                 }
 566
 567                 else if (strcasecmp (option,"ForceDefault")==0) {
 568                         if (strcasecmp (value,"on")==0)
 569                                 ForceDefault = 1;
 570                         else if (strcasecmp (value,"off")==0)
 571                                 ForceDefault = 0;
 572                         else {
 573                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 574                                 fclose (fp);return (0);
 575                         }
 576                 }
 577
 578                 else {
 579                         fprintf (stderr,"Error - Unknown option: %s\n",option);
 580                         fclose (fp);return (0);
 581                 }
 582         }
 583
 584         printf ("Configuration completed\n");
 585         fclose (fp);
 586         return (1);
 587 }
 588
 589 int get_next_option (FILE *fp,char *option,char *value)
 590
 591 {
 592         char *ptr;
 593         char buffer [600];
 594
 595         if (feof (fp)) return (0);
 596         do{
 597                 if (feof (fp)) return (0);
 598                 fgets (buffer,500,fp);
 599         } while (buffer [0]=='#' || buffer [0]=='\n');
 600
 601         ptr=parse_word (buffer,option);
 602         ptr=parse_word (ptr,value);
 603         return (1);
 604 }
 605
 606 void check_mounted (char *name)
 607
 608 {
 609         FILE *fp;
 610         char *ptr;
 611         char current_line [500],current_word [200];
 612
 613         mounted=0;
 614
 615         if ( (fp=fopen ("/etc/mtab","rt"))==NULL) {
 616                 wprintw (command_win,"Error - Failed to open /etc/mtab. Assuming filesystem is mounted.\n");
 617                 refresh_command_win ();mounted=1;return;
 618         };
 619
 620         while (!feof (fp)) {
 621                 fgets (current_line,500,fp);
 622                 if (feof (fp)) break;
 623                 ptr=parse_word (current_line,current_word);
 624                 if (strcasecmp (current_word,name)==0) {
 625                         mounted=1;fclose (fp);return;
 626                 }
 627         };
 628
 629         fclose (fp);
 630
 631         return;
 632 }