On Mac OS X, try poking launchd to get the portmapper launched before

we try to connect to it.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@20364 dc483132-0cff-0310-8789-dd5450dbe970

src/lib/rpc/pmap_clnt.c

@@ -43,6 +43,12 @@ static char sccsid[] = "@(#)pmap_clnt.c 1.37 87/08/11 Copyr 1984 Sun Micro";
 #include <gssrpc/pmap_prot.h>
 #include <gssrpc/pmap_clnt.h>
 
+#if TARGET_OS_MAC
+#include <sys/un.h>
+#include <string.h>
+#include <syslog.h>
+#endif
+
 static struct timeval timeout = { 5, 0 };
 static struct timeval tottimeout = { 60, 0 };
 
@@ -60,27 +66,73 @@ pmap_set(
 	u_int port)
 {
 	struct sockaddr_in myaddress;
-	int socket = -1;
+	int sock = -1;
 	register CLIENT *client;
 	struct pmap parms;
 	bool_t rslt;
 
 	get_myaddress(&myaddress);
 	client = clntudp_bufcreate(&myaddress, PMAPPROG, PMAPVERS,
-	    timeout, &socket, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
+	    timeout, &sock, RPCSMALLMSGSIZE, RPCSMALLMSGSIZE);
 	if (client == (CLIENT *)NULL)
 		return (FALSE);
 	parms.pm_prog = program;
 	parms.pm_vers = version;
 	parms.pm_prot = protocol;
 	parms.pm_port = port;
+#if TARGET_OS_MAC
+	{
+	    /*
+	     * Poke launchd, then wait for portmap to start up.
+	     *
+	     * My impression is that the protocol involves getting
+	     * something back from the server.  So wait, briefly, to
+	     * see if it's going to send us something.  Then continue
+	     * on, regardless.  I don't actually check what the data
+	     * is, because I have no idea what sort of validation, if
+	     * any, is needed.
+	     *
+	     * However, for whatever reason, the socket seems to be
+	     * mode 700 owner root on my system, so if you don't
+	     * change its ownership or mode, and if the program isn't
+	     * running as root, you still lose.
+	     */
+#define TICKLER_SOCKET "/var/run/portmap.socket"
+	    int tickle;
+	    struct sockaddr_un a = {
+		.sun_family = AF_UNIX,
+		.sun_path = TICKLER_SOCKET,
+		.sun_len = (sizeof(TICKLER_SOCKET)
+			    + offsetof(struct sockaddr_un, sun_path)),
+	    };
+
+	    if (sizeof(TICKLER_SOCKET) <= sizeof(a.sun_path)) {
+		tickle = socket(AF_UNIX, SOCK_STREAM, 0);
+		if (tickle >= 0) {
+		    if (connect(tickle, (struct sockaddr *)&a, a.sun_len) == 0
+			&& tickle < FD_SETSIZE) {
+			fd_set readfds;
+			struct timeval tv;
+
+			FD_ZERO(&readfds);
+			/* XXX Range check.  */
+			FD_SET(tickle, &readfds);
+			tv.tv_sec = 5;
+			tv.tv_usec = 0;
+			(void) select(tickle+1, &readfds, 0, 0, &tv);
+		    }
+		    close(tickle);
+		}
+	    }
+	}
+#endif
 	if (CLNT_CALL(client, PMAPPROC_SET, xdr_pmap, &parms, xdr_bool, &rslt,
 	    tottimeout) != RPC_SUCCESS) {
 		clnt_perror(client, "Cannot register service");
 		return (FALSE);
 	}
 	CLNT_DESTROY(client);
-	(void)close(socket);
+	(void)close(sock);
 	return (rslt);
 }