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