2.11BSD#431 - /usr/src/local/mtools/fat_free.c

   1: #include <stdio.h>
   2: #include "msdos.h"
   3: 
   4: extern int fat_error;
   5: extern unsigned int last_fat;
   6: 
   7: /*
   8:  * Remove a string of FAT entries (delete the file).  The argument is
   9:  * the beginning of the string.  Does not consider the file length, so
  10:  * if FAT is corrupted, watch out!
  11:  */
  12: 
  13: int
  14: fat_free(fat)
  15: unsigned int fat;
  16: {
  17:     unsigned int next, fat_decode();
  18:                     /* a zero length file? */
  19:     if (fat == 0)
  20:         return(0);
  21: 
  22:     /* CONSTCOND */
  23:     while (1) {
  24:                     /* get next cluster number */
  25:         next = fat_decode(fat);
  26:                     /* mark current cluster as empty */
  27:         if (fat_encode(fat, 0) || next == 1) {
  28:             fprintf(stderr, "fat_free: FAT problem\n");
  29:             fat_error++;
  30:             return(-1);
  31:         }
  32:         if (next >= last_fat)
  33:             break;
  34:         fat = next;
  35:     }
  36:     return(0);
  37: }

Defined functions