1 files changed, 63 insertions, 0 deletions
diff --git a/rsh.c b/rsh.c
new file mode 100644
index 000000000..4d6a90bf6
--- /dev/null
+++ b/rsh.c
@@ -0,0 +1,63 @@
+#include "rsh.h"
+
+#include <string.h>
+#include <sys/socket.h>
+
+#include "cache.h"
+
+#define COMMAND_SIZE 4096
+
+int setup_connection(int *fd_in, int *fd_out, char *remote_prog, 
+		     char *url, int rmt_argc, char **rmt_argv)
+{
+	char *host;
+	char *path;
+	int sv[2];
+	char command[COMMAND_SIZE];
+	char *posn;
+	int i;
+
+	if (!strcmp(url, "-")) {
+		*fd_in = 0;
+		*fd_out = 1;
+		return 0;
+	}
+
+	host = strstr(url, "//");
+	if (!host) {
+		return error("Bad URL: %s", url);
+	}
+	host += 2;
+	path = strchr(host, '/');
+	if (!path) {
+		return error("Bad URL: %s", url);
+	}
+	*(path++) = '\0';
+	/* ssh <host> 'cd /<path>; stdio-pull <arg...> <commit-id>' */
+	snprintf(command, COMMAND_SIZE, 
+		 "cd /%s; SHA1_FILE_DIRECTORY=objects %s",
+		 path, remote_prog);
+	posn = command + strlen(command);
+	for (i = 0; i < rmt_argc; i++) {
+		*(posn++) = ' ';
+		strncpy(posn, rmt_argv[i], COMMAND_SIZE - (posn - command));
+		posn += strlen(rmt_argv[i]);
+		if (posn - command + 4 >= COMMAND_SIZE) {
+			return error("Command line too long");
+		}
+	}
+	strcpy(posn, " -");
+	if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv)) {
+		return error("Couldn't create socket");
+	}
+	if (!fork()) {
+		close(sv[1]);
+		dup2(sv[0], 0);
+		dup2(sv[0], 1);
+		execlp("ssh", "ssh", host, command, NULL);
+	}
+	close(sv[0]);
+	*fd_in = sv[1];
+	*fd_out = sv[1];
+	return 0;
+}