1 files changed, 143 insertions, 0 deletions
diff --git a/ssh-upload.c b/ssh-upload.c
new file mode 100644
index 0000000000..20c35f03dd
--- /dev/null
+++ b/ssh-upload.c
@@ -0,0 +1,143 @@
+#ifndef COUNTERPART_ENV_NAME
+#define COUNTERPART_ENV_NAME "GIT_SSH_FETCH"
+#endif
+#ifndef COUNTERPART_PROGRAM_NAME
+#define COUNTERPART_PROGRAM_NAME "git-ssh-fetch"
+#endif
+#ifndef MY_PROGRAM_NAME
+#define MY_PROGRAM_NAME "git-ssh-upload"
+#endif
+
+#include "cache.h"
+#include "rsh.h"
+#include "refs.h"
+
+static unsigned char local_version = 1;
+static unsigned char remote_version;
+
+static int verbose;
+
+static int serve_object(int fd_in, int fd_out) {
+	ssize_t size;
+	unsigned char sha1[20];
+	signed char remote;
+
+	size = read_in_full(fd_in, sha1, 20);
+	if (size < 0) {
+		perror("git-ssh-upload: read ");
+		return -1;
+	}
+	if (!size)
+		return -1;
+
+	if (verbose)
+		fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1));
+
+	remote = 0;
+
+	if (!has_sha1_file(sha1)) {
+		fprintf(stderr, "git-ssh-upload: could not find %s\n",
+			sha1_to_hex(sha1));
+		remote = -1;
+	}
+
+	if (write_in_full(fd_out, &remote, 1) != 1)
+		return 0;
+
+	if (remote < 0)
+		return 0;
+
+	return write_sha1_to_fd(fd_out, sha1);
+}
+
+static int serve_version(int fd_in, int fd_out)
+{
+	if (xread(fd_in, &remote_version, 1) < 1)
+		return -1;
+	write_in_full(fd_out, &local_version, 1);
+	return 0;
+}
+
+static int serve_ref(int fd_in, int fd_out)
+{
+	char ref[PATH_MAX];
+	unsigned char sha1[20];
+	int posn = 0;
+	signed char remote = 0;
+	do {
+		if (posn >= PATH_MAX || xread(fd_in, ref + posn, 1) < 1)
+			return -1;
+		posn++;
+	} while (ref[posn - 1]);
+
+	if (verbose)
+		fprintf(stderr, "Serving %s\n", ref);
+
+	if (get_ref_sha1(ref, sha1))
+		remote = -1;
+	if (write_in_full(fd_out, &remote, 1) != 1)
+		return 0;
+	if (remote)
+		return 0;
+	write_in_full(fd_out, sha1, 20);
+        return 0;
+}
+
+
+static void service(int fd_in, int fd_out) {
+	char type;
+	ssize_t retval;
+	do {
+		retval = xread(fd_in, &type, 1);
+		if (retval < 1) {
+			if (retval < 0)
+				perror("git-ssh-upload: read ");
+			return;
+		}
+		if (type == 'v' && serve_version(fd_in, fd_out))
+			return;
+		if (type == 'o' && serve_object(fd_in, fd_out))
+			return;
+		if (type == 'r' && serve_ref(fd_in, fd_out))
+			return;
+	} while (1);
+}
+
+static const char ssh_push_usage[] =
+	MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url";
+
+int main(int argc, char **argv)
+{
+	int arg = 1;
+        char *commit_id;
+        char *url;
+	int fd_in, fd_out;
+	const char *prog;
+	unsigned char sha1[20];
+	char hex[41];
+
+	prog = getenv(COUNTERPART_ENV_NAME);
+	if (!prog) prog = COUNTERPART_PROGRAM_NAME;
+
+	setup_git_directory();
+
+	while (arg < argc && argv[arg][0] == '-') {
+		if (argv[arg][1] == 'w')
+			arg++;
+                arg++;
+        }
+	if (argc < arg + 2)
+		usage(ssh_push_usage);
+	commit_id = argv[arg];
+	url = argv[arg + 1];
+	if (get_sha1(commit_id, sha1))
+		die("Not a valid object name %s", commit_id);
+	memcpy(hex, sha1_to_hex(sha1), sizeof(hex));
+	argv[arg] = hex;
+
+	if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
+		return 1;
+
+	service(fd_in, fd_out);
+	return 0;
+}