cat-file.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7
   8 int main(int argc, char **argv)
   9 {
  10         unsigned char sha1[20];
  11         char type[20];
  12         void *buf;
  13         unsigned long size;
  14
  15         setup_git_directory();
  16         if (argc != 3 || get_sha1(argv[2], sha1))
  17                 usage("git-cat-file [-t | -s | <type>] <sha1>");
  18
  19         if (!strcmp("-t", argv[1]) || !strcmp("-s", argv[1])) {
  20                 if (!sha1_object_info(sha1, type,
  21                                       argv[1][1] == 's' ? &size : NULL)) {
  22                         switch (argv[1][1]) {
  23                         case 't':
  24                                 printf("%s\n", type);
  25                                 break;
  26                         case 's':
  27                                 printf("%lu\n", size);
  28                                 break;
  29                         }
  30                         return 0;
  31                 }
  32                 buf = NULL;
  33         } else {
  34                 buf = read_object_with_reference(sha1, argv[1], &size, NULL);
  35         }
  36
  37         if (!buf)
  38                 die("git-cat-file %s: bad file", argv[2]);
  39
  40         while (size > 0) {
  41                 long ret = write(1, buf, size);
  42                 if (ret < 0) {
  43                         if (errno == EAGAIN)
  44                                 continue;
  45                         /* Ignore epipe */
  46                         if (errno == EPIPE)
  47                                 break;
  48                         die("git-cat-file: %s", strerror(errno));
  49                 } else if (!ret) {
  50                         die("git-cat-file: disk full?");
  51                 }
  52                 size -= ret;
  53                 buf += ret;
  54         }
  55         return 0;
  56 }