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 "config.h"
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #ifdef HAVE_READLINE
  22 #include <readline.h>
  23 #endif
  24 #include <signal.h>
  25 #include <unistd.h>
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <fcntl.h>
  30
  31 #include "ext2ed.h"
  32
  33 char lines_s [80],cols_s [80];
  34
  35 void signal_handler (void);
  36
  37 void prepare_to_close (void)
  38
  39 {
  40         close_windows ();
  41         if (device_handle!=NULL)
  42                 fclose (device_handle);
  43         free_user_commands (&general_commands);
  44         free_user_commands (&ext2_commands);
  45         free_struct_descriptors ();
  46 }
  47
  48 int init (void)
  49
  50 {
  51         printf ("Initializing ...\n");
  52
  53         if (!process_configuration_file ()) {
  54                 fprintf (stderr,"Error - Unable to complete configuration. Quitting.\n");
  55                 return (0);
  56         };
  57
  58         general_commands.last_command=-1;       /* No commands whatsoever meanwhile */
  59         ext2_commands.last_command=-1;
  60         add_general_commands ();                /* Add the general commands, available always */
  61         device_handle=NULL;                     /* Notice that our device is still not set up */
  62         device_offset=-1;
  63         current_type=NULL;                      /* No filesystem specific types yet */
  64
  65         remember_lifo.entries_count=0;          /* Object memory is empty */
  66
  67         init_windows ();                        /* Initialize the NCURSES interface */
  68         init_readline ();                       /* Initialize the READLINE interface */
  69         init_signals ();                        /* Initialize the signal handlers */
  70         write_access=0;                         /* Write access disabled */
  71
  72         strcpy (last_command_line,"help");      /* Show the help screen to the user */
  73         dispatch ("help");
  74         return (1);                             /* Success */
  75 }
  76
  77 void add_general_commands (void)
  78
  79 {
  80         add_user_command (&general_commands,"help","EXT2ED help system",help);
  81         add_user_command (&general_commands,"set","Changes a variable in the current object",set);
  82         add_user_command (&general_commands,"setdevice","Selects the filesystem block device (e.g. /dev/hda1)",set_device);
  83         add_user_command (&general_commands,"setoffset","Moves asynchronously in the filesystem",set_offset);
  84         add_user_command (&general_commands,"settype","Tells EXT2ED how to interpret the current object",set_type);
  85         add_user_command (&general_commands,"show","Displays the current object",show);
  86         add_user_command (&general_commands,"pgup","Scrolls data one page up",pgup);
  87         add_user_command (&general_commands,"pgdn","Scrolls data one page down",pgdn);
  88         add_user_command (&general_commands,"redraw","Redisplay the screen",redraw);
  89         add_user_command (&general_commands,"remember","Saves the current position and data information",remember);
  90         add_user_command (&general_commands,"recall","Gets back to the saved object position",recall);
  91         add_user_command (&general_commands,"enablewrite","Enters Read/Write mode - Allows changing the filesystem",enable_write);
  92         add_user_command (&general_commands,"disablewrite","Enters read only mode",disable_write);
  93         add_user_command (&general_commands,"writedata","Write data back to disk",write_data);
  94         add_user_command (&general_commands,"next","Moves to the next byte in hex mode",next);
  95         add_user_command (&general_commands,"prev","Moves to the previous byte in hex mode",prev);
  96 }
  97
  98 void add_ext2_general_commands (void)
  99
 100 {
 101         add_user_command (&ext2_commands,"super","Moves to the superblock of the filesystem",type_ext2___super);
 102         add_user_command (&ext2_commands,"group","Moves to the first group descriptor",type_ext2___group);
 103         add_user_command (&ext2_commands,"cd","Moves to the directory specified",type_ext2___cd);
 104 }
 105
 106 int set_struct_descriptors (char *file_name)
 107
 108 {
 109         FILE *fp;
 110         char current_line [500],current_word [50],*ch;
 111         char variable_name [50],variable_type [20];
 112         struct struct_descriptor *current_descriptor;
 113
 114         if ( (fp=fopen (file_name,"rt"))==NULL) {
 115                 wprintw (command_win,"Error - Failed to open descriptors file %s\n",file_name);
 116                 refresh_command_win (); return (0);
 117         };
 118
 119         while (!feof (fp)) {
 120                 fgets (current_line,500,fp);
 121                 if (feof (fp)) break;
 122                 ch=parse_word (current_line,current_word);
 123                 if (strcmp (current_word,"struct")==0) {
 124                         ch=parse_word (ch,current_word);
 125                         current_descriptor=add_new_descriptor (current_word);
 126
 127                         while (strchr (current_line,'{')==NULL) {
 128                                 fgets (current_line,500,fp);
 129                                 if (feof (fp)) break;
 130                         };
 131                         if (feof (fp)) break;
 132
 133                         fgets (current_line,500,fp);
 134
 135                         while (strchr (current_line,'}')==NULL) {
 136                                 while (strchr (current_line,';')==NULL) {
 137                                         fgets (current_line,500,fp);
 138                                         if (strchr (current_line,'}')!=NULL) break;
 139                                 };
 140                                 if (strchr (current_line,'}') !=NULL) break;
 141                                 ch=parse_word (current_line,variable_type);
 142                                 ch=parse_word (ch,variable_name);
 143                                 while (variable_name [strlen (variable_name)-1]!=';') {
 144                                         strcpy (variable_type,variable_name);
 145                                         ch=parse_word (ch,variable_name);
 146                                 };
 147                                 variable_name [strlen (variable_name)-1]=0;
 148                                 add_new_variable (current_descriptor,variable_type,variable_name);
 149                                 fgets (current_line,500,fp);
 150                         };
 151                 };
 152         };
 153
 154         fclose (fp);
 155         return (1);
 156 }
 157
 158 void free_struct_descriptors (void)
 159
 160 {
 161         struct struct_descriptor *ptr,*next;
 162
 163         ptr=first_type;
 164         while (ptr!=NULL) {
 165                 next=ptr->next;
 166                 free_user_commands (&ptr->type_commands);
 167                 free (ptr);
 168                 ptr=next;
 169         }
 170         first_type=last_type=current_type=NULL;
 171 }
 172
 173 void free_user_commands (struct struct_commands *ptr)
 174
 175 {
 176         int i;
 177
 178         for (i=0;i<=ptr->last_command;i++) {
 179                 free (ptr->names [i]);
 180                 free (ptr->descriptions [i]);
 181         }
 182
 183         ptr->last_command=-1;
 184 }
 185
 186 struct struct_descriptor *add_new_descriptor (char *name)
 187
 188 {
 189         struct struct_descriptor *ptr;
 190
 191         ptr = malloc (sizeof (struct struct_descriptor));
 192         if (ptr == NULL) {
 193                 printf ("Error - Can not allocate memory - Quitting\n");
 194                 exit (1);
 195         }
 196         memset(ptr, 0, sizeof(struct struct_descriptor));
 197         ptr->prev = ptr->next = NULL;
 198         strcpy (ptr->name,name);
 199         ptr->length=0;
 200         ptr->fields_num=0;
 201         if (first_type==NULL) {
 202                 first_type = last_type = ptr;
 203         } else {
 204                 ptr->prev = last_type; last_type->next = ptr; last_type=ptr;
 205         }
 206         ptr->type_commands.last_command=-1;
 207         fill_type_commands (ptr);
 208         return (ptr);
 209 }
 210
 211 struct type_table {
 212         char    *name;
 213         int     field_type;
 214         int     len;
 215 };
 216
 217 struct type_table type_table[] = {
 218         { "long",   FIELD_TYPE_INT,     4 },
 219         { "short",  FIELD_TYPE_INT,     2 },
 220         { "char",   FIELD_TYPE_CHAR,    1 },
 221         { "__u32",  FIELD_TYPE_UINT,    4 },
 222         { "__s32",  FIELD_TYPE_INT,     4 },
 223         { "__u16",  FIELD_TYPE_UINT,    2 },
 224         { "__s16",  FIELD_TYPE_INT,     2 },
 225         { "__u8",   FIELD_TYPE_UINT,    1 },
 226         { "__s8",   FIELD_TYPE_INT,     1 },
 227         {  0,       0,                  0 }
 228 };
 229
 230 void add_new_variable (struct struct_descriptor *ptr,char *v_type,char *v_name)
 231
 232 {
 233         short   len=1;
 234         char    field_type=FIELD_TYPE_INT;
 235         struct type_table *p;
 236
 237         strcpy (ptr->field_names [ptr->fields_num],v_name);
 238         ptr->field_positions [ptr->fields_num]=ptr->length;
 239
 240         for (p = type_table; p->name; p++) {
 241                 if (strcmp(v_type, p->name) == 0) {
 242                         len = p->len;
 243                         field_type = p->field_type;
 244                         break;
 245                 }
 246         }
 247         if (p->name == 0) {
 248                 if (strncmp(v_type, "char[", 5) == 0) {
 249                         len = atoi(v_type+5);
 250                         field_type = FIELD_TYPE_CHAR;
 251                 } else {
 252                         printf("Unknown type %s for field %s\n", v_type, v_name);
 253                         exit(1);
 254                 }
 255         }
 256
 257         ptr->field_lengths [ptr->fields_num] = len;
 258         ptr->field_types [ptr->fields_num] = field_type;
 259
 260         ptr->length+=len;
 261         ptr->fields_num++;
 262 }
 263
 264 void fill_type_commands (struct struct_descriptor *ptr)
 265
 266 /*
 267
 268 Set specific type user commands.
 269
 270 */
 271
 272 {
 273
 274         if (strcmp ((ptr->name),"file")==0) {
 275                 add_user_command (&ptr->type_commands,"show","Shows file data",type_file___show);
 276                 add_user_command (&ptr->type_commands,"inode","Returns to the inode of the current file",type_file___inode);
 277                 add_user_command (&ptr->type_commands,"display","Specifies data format - text or hex",type_file___display);
 278                 add_user_command (&ptr->type_commands,"next","Pass to next byte",type_file___next);
 279                 add_user_command (&ptr->type_commands,"prev","Pass to the previous byte",type_file___prev);
 280                 add_user_command (&ptr->type_commands,"offset","Pass to a specified byte in the current block",type_file___offset);
 281                 add_user_command (&ptr->type_commands,"nextblock","Pass to next file block",type_file___nextblock);
 282                 add_user_command (&ptr->type_commands,"prevblock","Pass to the previous file block",type_file___prevblock);
 283                 add_user_command (&ptr->type_commands,"block","Specify which file block to edit",type_file___block);
 284                 add_user_command (&ptr->type_commands,"remember","Saves the file\'s inode position for later reference",type_file___remember);
 285                 add_user_command (&ptr->type_commands,"set","Sets the current byte",type_file___set);
 286                 add_user_command (&ptr->type_commands,"writedata","Writes the current block to the disk",type_file___writedata);
 287         }
 288
 289         if (strcmp ((ptr->name),"ext2_inode")==0) {
 290                 add_user_command (&ptr->type_commands,"show","Shows inode data",type_ext2_inode___show);
 291                 add_user_command (&ptr->type_commands,"next","Move to next inode in current block group",type_ext2_inode___next);
 292                 add_user_command (&ptr->type_commands,"prev","Move to next inode in current block group",type_ext2_inode___prev);
 293                 add_user_command (&ptr->type_commands,"group","Move to the group descriptors of the current inode table",type_ext2_inode___group);
 294                 add_user_command (&ptr->type_commands,"entry","Move to a specified entry in the current inode table",type_ext2_inode___entry);
 295                 add_user_command (&ptr->type_commands,"file","Display file data of the current inode",type_ext2_inode___file);
 296                 add_user_command (&ptr->type_commands,"dir","Display directory data of the current inode",type_ext2_inode___dir);
 297         }
 298
 299         if (strcmp ((ptr->name),"dir")==0) {
 300                 add_user_command (&ptr->type_commands,"show","Shows current directory data",type_dir___show);
 301                 add_user_command (&ptr->type_commands,"inode","Returns to the inode of the current directory",type_dir___inode);
 302                 add_user_command (&ptr->type_commands,"next","Pass to the next directory entry",type_dir___next);
 303                 add_user_command (&ptr->type_commands,"prev","Pass to the previous directory entry",type_dir___prev);
 304                 add_user_command (&ptr->type_commands,"followinode","Follows the inode specified in this directory entry",type_dir___followinode);
 305                 add_user_command (&ptr->type_commands,"remember","Remember the inode of the current directory entry",type_dir___remember);
 306                 add_user_command (&ptr->type_commands,"cd","Changes directory relative to the current directory",type_dir___cd);
 307                 add_user_command (&ptr->type_commands,"entry","Moves to a specified entry in the current directory",type_dir___entry);
 308                 add_user_command (&ptr->type_commands,"writedata","Writes the current entry to the disk",type_dir___writedata);
 309                 add_user_command (&ptr->type_commands,"set","Changes a variable in the current directory entry",type_dir___set);
 310         }
 311
 312         if (strcmp ((ptr->name),"ext2_super_block")==0) {
 313                 add_user_command (&ptr->type_commands,"show","Displays the super block data",type_ext2_super_block___show);
 314                 add_user_command (&ptr->type_commands,"gocopy","Move to another backup copy of the superblock",type_ext2_super_block___gocopy);
 315                 add_user_command (&ptr->type_commands,"setactivecopy","Copies the current superblock to the main superblock",type_ext2_super_block___setactivecopy);
 316         }
 317
 318         if (strcmp ((ptr->name),"ext2_group_desc")==0) {
 319                 add_user_command (&ptr->type_commands,"next","Pass to the next block group descriptor",type_ext2_group_desc___next);
 320                 add_user_command (&ptr->type_commands,"prev","Pass to the previous group descriptor",type_ext2_group_desc___prev);
 321                 add_user_command (&ptr->type_commands,"entry","Pass to a specific group descriptor",type_ext2_group_desc___entry);
 322                 add_user_command (&ptr->type_commands,"show","Shows the current group descriptor",type_ext2_group_desc___show);
 323                 add_user_command (&ptr->type_commands,"inode","Pass to the inode table of the current group block",type_ext2_group_desc___inode);
 324                 add_user_command (&ptr->type_commands,"gocopy","Move to another backup copy of the group descriptor",type_ext2_group_desc___gocopy);
 325                 add_user_command (&ptr->type_commands,"blockbitmap","Show the block allocation bitmap of the current group block",type_ext2_group_desc___blockbitmap);
 326                 add_user_command (&ptr->type_commands,"inodebitmap","Show the inode allocation bitmap of the current group block",type_ext2_group_desc___inodebitmap);
 327                 add_user_command (&ptr->type_commands,"setactivecopy","Copies the current group descriptor to the main table",type_ext2_super_block___setactivecopy);
 328         }
 329
 330         if (strcmp ((ptr->name),"block_bitmap")==0) {
 331                 add_user_command (&ptr->type_commands,"show","Displays the block allocation bitmap",type_ext2_block_bitmap___show);
 332                 add_user_command (&ptr->type_commands,"entry","Moves to a specific bit",type_ext2_block_bitmap___entry);
 333                 add_user_command (&ptr->type_commands,"next","Moves to the next bit",type_ext2_block_bitmap___next);
 334                 add_user_command (&ptr->type_commands,"prev","Moves to the previous bit",type_ext2_block_bitmap___prev);
 335                 add_user_command (&ptr->type_commands,"allocate","Allocates the current block",type_ext2_block_bitmap___allocate);
 336                 add_user_command (&ptr->type_commands,"deallocate","Deallocates the current block",type_ext2_block_bitmap___deallocate);
 337         }
 338
 339         if (strcmp ((ptr->name),"inode_bitmap")==0) {
 340                 add_user_command (&ptr->type_commands,"show","Displays the inode allocation bitmap",type_ext2_inode_bitmap___show);
 341                 add_user_command (&ptr->type_commands,"entry","Moves to a specific bit",type_ext2_inode_bitmap___entry);
 342                 add_user_command (&ptr->type_commands,"next","Moves to the next bit",type_ext2_inode_bitmap___next);
 343                 add_user_command (&ptr->type_commands,"prev","Moves to the previous bit",type_ext2_inode_bitmap___prev);
 344                 add_user_command (&ptr->type_commands,"allocate","Allocates the current inode",type_ext2_inode_bitmap___allocate);
 345                 add_user_command (&ptr->type_commands,"deallocate","Deallocates the current inode",type_ext2_inode_bitmap___deallocate);
 346         }
 347
 348 }
 349
 350 void add_user_command (struct struct_commands *ptr,char *name,char *description,PF callback)
 351
 352 {
 353         int num;
 354
 355         num=ptr->last_command;
 356         if (num+1==MAX_COMMANDS_NUM) {
 357                 printf ("Internal Error - Can't add command %s\n",name);
 358                 return;
 359         }
 360
 361         ptr->last_command=++num;
 362
 363         ptr->names [num]=(char *) malloc (strlen (name)+1);
 364         strcpy (ptr->names [num],name);
 365
 366         if (*description!=0) {
 367                 ptr->descriptions [num]=(char *) malloc (strlen (description)+1);
 368                 strcpy (ptr->descriptions [num],description);
 369         }
 370
 371         ptr->callback [num]=callback;
 372 }
 373
 374 int set_file_system_info (void)
 375
 376 {
 377         int ext2_detected=0;
 378         struct ext2_super_block *sb;
 379
 380         file_system_info.super_block_offset=1024;
 381         file_system_info.file_system_size=DefaultTotalBlocks*DefaultBlockSize;
 382
 383         low_read ((char *) &file_system_info.super_block,sizeof (struct ext2_super_block),file_system_info.super_block_offset);
 384
 385         sb=&file_system_info.super_block;
 386
 387         if (sb->s_magic == EXT2_SUPER_MAGIC)
 388                 ext2_detected=1;
 389
 390         if (ext2_detected)
 391                 wprintw (command_win,"Detected extended 2 file system on device %s\n",device_name);
 392         else
 393                 wprintw (command_win,"Warning - Extended 2 filesystem not detected on device %s\n",device_name);
 394
 395         if (!ext2_detected && !ForceExt2)
 396                 wprintw (command_win,"You may wish to use the configuration option ForceExt2 on\n");
 397
 398         if (ForceExt2 && !ext2_detected)
 399                 wprintw (command_win,"Forcing extended 2 filesystem\n");
 400
 401         if (ForceDefault || !ext2_detected)
 402                 wprintw (command_win,"Forcing default parameters\n");
 403
 404         refresh_command_win ();
 405
 406         if (ext2_detected || ForceExt2) {
 407                 add_ext2_general_commands ();
 408                 if (!set_struct_descriptors (Ext2Descriptors))
 409                         return (0);
 410         }
 411
 412         if (!ForceDefault && ext2_detected) {
 413
 414                 file_system_info.block_size=EXT2_MIN_BLOCK_SIZE << sb->s_log_block_size;
 415                 if (file_system_info.block_size == EXT2_MIN_BLOCK_SIZE)
 416                         file_system_info.first_group_desc_offset=2*EXT2_MIN_BLOCK_SIZE;
 417                 else
 418                         file_system_info.first_group_desc_offset=file_system_info.block_size;
 419                 file_system_info.groups_count = ext2fs_div64_ceil(ext2fs_blocks_count(sb),
 420                                                  sb->s_blocks_per_group);
 421
 422                 file_system_info.inodes_per_block=file_system_info.block_size/sizeof (struct ext2_inode);
 423                 file_system_info.blocks_per_group=sb->s_inodes_per_group/file_system_info.inodes_per_block;
 424                 file_system_info.no_blocks_in_group=sb->s_blocks_per_group;
 425                 file_system_info.file_system_size=(ext2fs_blocks_count(sb)-1)*file_system_info.block_size;
 426         }
 427
 428         else {
 429                 file_system_info.file_system_size=DefaultTotalBlocks*DefaultBlockSize;
 430                 file_system_info.block_size=DefaultBlockSize;
 431                 file_system_info.no_blocks_in_group=DefaultBlocksInGroup;
 432         }
 433
 434         if (file_system_info.file_system_size > 2147483647) {
 435                 wprintw (command_win,"Sorry, filesystems bigger than 2 GB are currently not supported\n");
 436                 return (0);
 437         }
 438         return (1);
 439 }
 440
 441 void init_readline (void)
 442
 443 {
 444 #ifdef HAVE_READLINE
 445         rl_completion_entry_function=(Function *) complete_command;
 446 #endif
 447 }
 448
 449 void init_signals (void)
 450
 451 {
 452         signal (SIGWINCH, signal_SIGWINCH_handler);     /* Catch SIGWINCH */
 453         signal (SIGTERM, signal_SIGTERM_handler);
 454         signal (SIGSEGV, signal_SIGSEGV_handler);
 455
 456 }
 457
 458 void signal_SIGWINCH_handler (int sig_num)
 459
 460 {
 461         redraw_request=1;       /* We will handle it in main.c */
 462
 463         /* Reset signal handler */
 464         signal (SIGWINCH, signal_SIGWINCH_handler);
 465
 466 }
 467
 468 void signal_SIGTERM_handler (int sig_num)
 469
 470 {
 471         prepare_to_close ();
 472         printf ("Terminated due to signal %d\n",sig_num);
 473         exit (1);
 474 }
 475
 476 void signal_SIGSEGV_handler (int sig_num)
 477
 478 {
 479         prepare_to_close ();
 480         printf ("Killed by signal %d!\n",sig_num);
 481         exit (1);
 482 }
 483
 484 int process_configuration_file (void)
 485
 486 {
 487         char buffer [300];
 488         char option [80],value [80];
 489         FILE *fp;
 490
 491         strcpy (buffer, ROOT_SYSCONFDIR);
 492         strcat (buffer,"/ext2ed.conf");
 493
 494         if ((fp=fopen (buffer,"rt"))==NULL) {
 495                 fprintf (stderr,"Error - Unable to open configuration file %s\n",buffer);
 496                 return (0);
 497         }
 498
 499         while (get_next_option (fp,option,value)) {
 500                 if (strcasecmp (option,"Ext2Descriptors")==0) {
 501                         strcpy (Ext2Descriptors,value);
 502                 }
 503
 504                 else if (strcasecmp (option,"AlternateDescriptors")==0) {
 505                         strcpy (AlternateDescriptors,value);
 506                 }
 507
 508                 else if (strcasecmp (option,"LogFile")==0) {
 509                         strcpy (LogFile,value);
 510                 }
 511
 512                 else if (strcasecmp (option,"LogChanges")==0) {
 513                         if (strcasecmp (value,"on")==0)
 514                                 LogChanges = 1;
 515                         else if (strcasecmp (value,"off")==0)
 516                                 LogChanges = 0;
 517                         else {
 518                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 519                                 fclose (fp);return (0);
 520                         }
 521                 }
 522
 523                 else if (strcasecmp (option,"AllowChanges")==0) {
 524                         if (strcasecmp (value,"on")==0)
 525                                 AllowChanges = 1;
 526                         else if (strcasecmp (value,"off")==0)
 527                                 AllowChanges = 0;
 528                         else {
 529                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 530                                 fclose (fp);return (0);
 531                         }
 532                 }
 533
 534                 else if (strcasecmp (option,"AllowMountedRead")==0) {
 535                         if (strcasecmp (value,"on")==0)
 536                                 AllowMountedRead = 1;
 537                         else if (strcasecmp (value,"off")==0)
 538                                 AllowMountedRead = 0;
 539                         else {
 540                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 541                                 fclose (fp);return (0);
 542                         }
 543                 }
 544
 545                 else if (strcasecmp (option,"ForceExt2")==0) {
 546                         if (strcasecmp (value,"on")==0)
 547                                 ForceExt2 = 1;
 548                         else if (strcasecmp (value,"off")==0)
 549                                 ForceExt2 = 0;
 550                         else {
 551                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 552                                 fclose (fp);return (0);
 553                         }
 554                 }
 555
 556                 else if (strcasecmp (option,"DefaultBlockSize")==0) {
 557                         DefaultBlockSize = atoi (value);
 558                 }
 559
 560                 else if (strcasecmp (option,"DefaultTotalBlocks")==0) {
 561                         DefaultTotalBlocks = strtoul (value,NULL,10);
 562                 }
 563
 564                 else if (strcasecmp (option,"DefaultBlocksInGroup")==0) {
 565                         DefaultBlocksInGroup = strtoul (value,NULL,10);
 566                 }
 567
 568                 else if (strcasecmp (option,"ForceDefault")==0) {
 569                         if (strcasecmp (value,"on")==0)
 570                                 ForceDefault = 1;
 571                         else if (strcasecmp (value,"off")==0)
 572                                 ForceDefault = 0;
 573                         else {
 574                                 fprintf (stderr,"Error - Illegal value: %s %s\n",option,value);
 575                                 fclose (fp);return (0);
 576                         }
 577                 }
 578
 579                 else {
 580                         fprintf (stderr,"Error - Unknown option: %s\n",option);
 581                         fclose (fp);return (0);
 582                 }
 583         }
 584
 585         printf ("Configuration completed\n");
 586         fclose (fp);
 587         return (1);
 588 }
 589
 590 int get_next_option (FILE *fp,char *option,char *value)
 591
 592 {
 593         char *ptr;
 594         char buffer [600];
 595
 596         if (feof (fp)) return (0);
 597         do{
 598                 if (feof (fp)) return (0);
 599                 fgets (buffer,500,fp);
 600         } while (buffer [0]=='#' || buffer [0]=='\n');
 601
 602         ptr=parse_word (buffer,option);
 603         ptr=parse_word (ptr,value);
 604         return (1);
 605 }
 606
 607 void check_mounted (char *name)
 608
 609 {
 610         FILE *fp;
 611         char *ptr;
 612         char current_line [500],current_word [200];
 613
 614         mounted=0;
 615
 616         if ( (fp=fopen ("/etc/mtab","rt"))==NULL) {
 617                 wprintw (command_win,"Error - Failed to open /etc/mtab. Assuming filesystem is mounted.\n");
 618                 refresh_command_win ();mounted=1;return;
 619         };
 620
 621         while (!feof (fp)) {
 622                 fgets (current_line,500,fp);
 623                 if (feof (fp)) break;
 624                 ptr=parse_word (current_line,current_word);
 625                 if (strcasecmp (current_word,name)==0) {
 626                         mounted=1;fclose (fp);return;
 627                 }
 628         };
 629
 630         fclose (fp);
 631
 632         return;
 633 }