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-rw-r--r--ssh-upload.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/ssh-upload.c b/ssh-upload.c
new file mode 100644
index 0000000..10a3687
--- /dev/null
+++ b/ssh-upload.c
@@ -0,0 +1,133 @@
+#include "cache.h"
+#include "rsh.h"
+#include "refs.h"
+
+#include <string.h>
+
+static unsigned char local_version = 1;
+static unsigned char remote_version = 0;
+
+static int verbose = 0;
+
+static int serve_object(int fd_in, int fd_out) {
+ ssize_t size;
+ unsigned char sha1[20];
+ signed char remote;
+ int posn = 0;
+ do {
+ size = read(fd_in, sha1 + posn, 20 - posn);
+ if (size < 0) {
+ perror("git-ssh-upload: read ");
+ return -1;
+ }
+ if (!size)
+ return -1;
+ posn += size;
+ } while (posn < 20);
+
+ 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;
+ }
+
+ write(fd_out, &remote, 1);
+
+ if (remote < 0)
+ return 0;
+
+ return write_sha1_to_fd(fd_out, sha1);
+}
+
+static int serve_version(int fd_in, int fd_out)
+{
+ if (read(fd_in, &remote_version, 1) < 1)
+ return -1;
+ write(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 (read(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;
+ write(fd_out, &remote, 1);
+ if (remote)
+ return 0;
+ write(fd_out, sha1, 20);
+ return 0;
+}
+
+
+static void service(int fd_in, int fd_out) {
+ char type;
+ int retval;
+ do {
+ retval = read(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[] =
+ "git-ssh-upload [-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("GIT_SSH_PULL");
+ if (!prog) prog = "git-ssh-fetch";
+ 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))
+ usage(ssh_push_usage);
+ 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;
+}