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authorPaul Sherwood <paul.sherwood@codethink.co.uk>2014-04-29 20:37:28 +0000
committerPaul Sherwood <paul.sherwood@codethink.co.uk>2014-04-29 20:37:28 +0000
commite98c205a5c3fb893ffdda3f5e05d1967b4a79c1d (patch)
tree3ecbd4f05ab9601cefa7b322323039795db440a9 /builtin/get-tar-commit-id.c
parent43efcf42382e87de4aa423e5e1607958ad1717d0 (diff)
parent0bc85abb7aa9b24b093253018801a0fb43d01122 (diff)
downloadgit-baserock/ps/update-git.tar.gz
Merge tag 'v1.9.2' into HEADbaserock/ps/update-git
Git 1.9.2
Diffstat (limited to 'builtin/get-tar-commit-id.c')
-rw-r--r--builtin/get-tar-commit-id.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/builtin/get-tar-commit-id.c b/builtin/get-tar-commit-id.c
new file mode 100644
index 0000000000..aa72596083
--- /dev/null
+++ b/builtin/get-tar-commit-id.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2005, 2006 Rene Scharfe
+ */
+#include "cache.h"
+#include "commit.h"
+#include "tar.h"
+#include "builtin.h"
+#include "quote.h"
+
+static const char builtin_get_tar_commit_id_usage[] =
+"git get-tar-commit-id < <tarfile>";
+
+/* ustar header + extended global header content */
+#define RECORDSIZE (512)
+#define HEADERSIZE (2 * RECORDSIZE)
+
+int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
+{
+ char buffer[HEADERSIZE];
+ struct ustar_header *header = (struct ustar_header *)buffer;
+ char *content = buffer + RECORDSIZE;
+ ssize_t n;
+
+ if (argc != 1)
+ usage(builtin_get_tar_commit_id_usage);
+
+ n = read_in_full(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 = write_in_full(1, content + 11, 41);
+ if (n < 41)
+ die_errno("git get-tar-commit-id: write error");
+
+ return 0;
+}