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("cat-file [-t | tagname] <sha1>");
  17
  18         if (!strcmp("-t", argv[1])) {
  19                 buf = read_sha1_file(sha1, type, &size);
  20                 if (buf) {
  21                         buf = type;
  22                         size = strlen(type);
  23                         type[size] = '\n';
  24                 }
  25         } else {
  26                 buf = read_object_with_reference(sha1, argv[1], &size, NULL);
  27         }
  28
  29         if (!buf)
  30                 die("cat-file %s: bad file", argv[2]);
  31
  32         while (size > 0) {
  33                 long ret = write(1, buf, size);
  34                 if (ret < 0) {
  35                         if (errno == EAGAIN)
  36                                 continue;
  37                         /* Ignore epipe */
  38                         if (errno == EPIPE)
  39                                 break;
  40                         die("cat-file: %s", strerror(errno));
  41                 } else if (!ret) {
  42                         die("cat-file: disk full?");
  43                 }
  44                 size -= ret;
  45                 buf += ret;
  46         }
  47         return 0;
  48 }