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         if (argc != 3 || get_sha1(argv[2], sha1))
  16                 usage("git-cat-file [-t | -s | tagname] <sha1>");
  17
  18         if (!strcmp("-t", argv[1]) || !strcmp("-s", argv[1])) {
  19                 if (!sha1_object_info(sha1, type,
  20                                       argv[1][1] == 's' ? &size : NULL)) {
  21                         switch (argv[1][1]) {
  22                         case 't':
  23                                 printf("%s\n", type);
  24                                 break;
  25                         case 's':
  26                                 printf("%lu\n", size);
  27                                 break;
  28                         }
  29                         return 0;
  30                 }
  31                 buf = NULL;
  32         } else {
  33                 buf = read_object_with_reference(sha1, argv[1], &size, NULL);
  34         }
  35
  36         if (!buf)
  37                 die("git-cat-file %s: bad file", argv[2]);
  38
  39         while (size > 0) {
  40                 long ret = write(1, buf, size);
  41                 if (ret < 0) {
  42                         if (errno == EAGAIN)
  43                                 continue;
  44                         /* Ignore epipe */
  45                         if (errno == EPIPE)
  46                                 break;
  47                         die("git-cat-file: %s", strerror(errno));
  48                 } else if (!ret) {
  49                         die("git-cat-file: disk full?");
  50                 }
  51                 size -= ret;
  52                 buf += ret;
  53         }
  54         return 0;
  55 }