diff options
Diffstat (limited to 'builtin-tar-tree.c')
| -rw-r--r-- | builtin-tar-tree.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/builtin-tar-tree.c b/builtin-tar-tree.c index 7663b9bd8..58a8ccd4d 100644 --- a/builtin-tar-tree.c +++ b/builtin-tar-tree.c @@ -402,3 +402,28 @@ int cmd_tar_tree(int argc, const char **argv, char **envp) return remote_tar(argc, argv); return generate_tar(argc, argv, envp); } + +/* ustar header + extended global header content */ +#define HEADERSIZE (2 * RECORDSIZE) + +int cmd_get_tar_commit_id(int argc, const char **argv, char **envp) +{ + char buffer[HEADERSIZE]; + struct ustar_header *header = (struct ustar_header *)buffer; + char *content = buffer + RECORDSIZE; + ssize_t n; + + n = xread(0, buffer, HEADERSIZE); + if (n < HEADERSIZE) + die("git-get-tar-commit-id: read error"); + if (header->typeflag[0] != 'g') + return 1; + if (memcmp(content, "52 comment=", 11)) + return 1; + + n = xwrite(1, content + 11, 41); + if (n < 41) + die("git-get-tar-commit-id: write error"); + + return 0; +} |