git-diff-cache: add "-m" flag to match all non-checked-out files with the index.
[git/git.git] / 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 buf = read_sha1_file(sha1, type, &size);
20 if (buf) {
21 buf = type;
22 size = strlen(type);
23 type[size] = '\n';
24 size++;
25 }
26 } else {
27 buf = read_object_with_reference(sha1, argv[1], &size, NULL);
28 }
29
30 if (!buf)
31 die("git-cat-file %s: bad file", argv[2]);
32
33 while (size > 0) {
34 long ret = write(1, buf, size);
35 if (ret < 0) {
36 if (errno == EAGAIN)
37 continue;
38 /* Ignore epipe */
39 if (errno == EPIPE)
40 break;
41 die("git-cat-file: %s", strerror(errno));
42 } else if (!ret) {
43 die("git-cat-file: disk full?");
44 }
45 size -= ret;
46 buf += ret;
47 }
48 return 0;
49 }