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 | tagname] <sha1>");
  17
  18         if (!strcmp("-t", argv[1])) {
  19                 if (!sha1_object_info(sha1, type, &size)) {
  20                         printf("%s\n", type);
  21                         return 0;
  22                 }
  23                 buf = NULL;
  24         } else {
  25                 buf = read_object_with_reference(sha1, argv[1], &size, NULL);
  26         }
  27
  28         if (!buf)
  29                 die("git-cat-file %s: bad file", argv[2]);
  30
  31         while (size > 0) {
  32                 long ret = write(1, buf, size);
  33                 if (ret < 0) {
  34                         if (errno == EAGAIN)
  35                                 continue;
  36                         /* Ignore epipe */
  37                         if (errno == EPIPE)
  38                                 break;
  39                         die("git-cat-file: %s", strerror(errno));
  40                 } else if (!ret) {
  41                         die("git-cat-file: disk full?");
  42                 }
  43                 size -= ret;
  44                 buf += ret;
  45         }
  46         return 0;
  47 }