utilities/hogextract.c

   1 /*
   2  * Written 1999 Jan 29 by Josh Cogliati
   3  * Modified by Bradley Bell, 2002, 2003
   4  * This program is licensed under the terms of the GPL, version 2 or later
   5  */
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12 #include <fcntl.h>
  13
  14 int
  15 main(int argc, char *argv[])
  16 {
  17         FILE *hogfile, *writefile;
  18         int len;
  19         char filename[13];
  20         char *buf;
  21         struct stat statbuf;
  22         int v = 0;
  23
  24         if (argc > 1 && !strcmp(argv[1], "v")) {
  25                 v = 1;
  26                 argc--;
  27                 argv++;
  28         }
  29
  30         if (argc < 2) {
  31                 printf("Usage: hogextract [v] hogfile [filename]\n"
  32                        "extracts all the files in hogfile into the current directory\n"
  33                            "Options:\n"
  34                            "  v    View files, don't extract\n");
  35                 exit(0);
  36         }
  37         hogfile = fopen(argv[1], "r");
  38         stat(argv[1], &statbuf);
  39         printf("%i\n", (int)statbuf.st_size);
  40         buf = (char *)malloc(3);
  41         fread(buf, 3, 1, hogfile);
  42         printf("Extracting from: %s\n", argv[1]);
  43         free(buf);
  44         while(ftell(hogfile)<statbuf.st_size) {
  45                 fread(filename, 13, 1, hogfile);
  46                 fread(&len, sizeof(int), 1, hogfile);
  47                 if (argc > 2 && strcmp(argv[2], filename))
  48                         fseek(hogfile, len, SEEK_CUR);
  49                 else {
  50                         printf("Filename: %s \tLength: %i\n", filename, len);
  51                         if (v)
  52                                 fseek(hogfile, len, SEEK_CUR);
  53                         else {
  54                                 buf = (char *)malloc(len);
  55                                 if (buf == NULL) {
  56                                         printf("Unable to allocate memory\n");
  57                                 } else {
  58                                         fread(buf, len, 1, hogfile);
  59                                         writefile = fopen(filename, "w");
  60                                         fwrite(buf, len, 1, writefile);
  61                                         fclose(writefile);
  62                                         free(buf);
  63                                 }
  64                         }
  65                 }
  66         }
  67         fclose(hogfile);
  68
  69         return 0;
  70 }