utilities/hogextract.c

   1 /*
   2  * Written 1999 Jan 29 by Josh Cogliati
   3  * I grant this program to public domain.
   4  *
   5  * Modified by Bradley Bell, 2002
   6  * All modifications under GPL, version 2 or later
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <sys/types.h>
  12 #include <sys/stat.h>
  13 #include <fcntl.h>
  14
  15 int
  16 main(int argc, char *argv[])
  17 {
  18         FILE *hogfile, *writefile;
  19         int len;
  20         char filename[13];
  21         char *buf;
  22         struct stat statbuf;
  23         int v = 0;
  24
  25         if (argc > 1 && !strcmp(argv[1], "v")) {
  26                 v = 1;
  27                 argc--;
  28                 argv++;
  29         }
  30
  31         if (argc < 2) {
  32                 printf("Usage: hogextract [v] hogfile [filename]\n"
  33                        "extracts all the files in hogfile into the current directory\n"
  34                            "Options:\n"
  35                            "  v    View files, don't extract\n");
  36                 exit(0);
  37         }
  38         hogfile = fopen(argv[1], "r");
  39         stat(argv[1], &statbuf);
  40         printf("%i\n", (int)statbuf.st_size);
  41         buf = (char *)malloc(3);
  42         fread(buf, 3, 1, hogfile);
  43         printf("Extracting from: %s\n", argv[1]);
  44         free(buf);
  45         while(ftell(hogfile)<statbuf.st_size) {
  46                 fread(filename, 13, 1, hogfile);
  47                 fread(&len, sizeof(int), 1, hogfile);
  48                 if (argc > 2 && strcmp(argv[2], filename))
  49                         fseek(hogfile, len, SEEK_CUR);
  50                 else {
  51                         printf("Filename: %s \tLength: %i\n", filename, len);
  52                         if (v)
  53                                 fseek(hogfile, len, SEEK_CUR);
  54                         else {
  55                                 buf = (char *)malloc(len);
  56                                 if (buf == NULL) {
  57                                         printf("Unable to allocate memory\n");
  58                                 } else {
  59                                         fread(buf, len, 1, hogfile);
  60                                         writefile = fopen(filename, "w");
  61                                         fwrite(buf, len, 1, writefile);
  62                                         fclose(writefile);
  63                                         free(buf);
  64                                 }
  65                         }
  66                 }
  67         }
  68         fclose(hogfile);
  69
  70         return 0;
  71 }