fixes for pipe close issue on RH systems

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@440 0c269be4-1314-0410-8aa9-9f06e86f4224

configure.in

@@ -13,8 +13,9 @@ dnl micro version = incremented when implementation-only
 dnl                 changes are made
 dnl ---
 JACK_MAJOR_VERSION=0
-JACK_MINOR_VERSION=74
-JACK_MICRO_VERSION=2
+JACK_MINOR_VERSION=75
+JACK_MICRO_VERSION=0
+
 
 dnl ---
 dnl HOWTO: updating the jack protocal version

jackd/jackd.c

@@ -329,6 +329,13 @@ main (int argc, char *argv[])
 	/* check to see if there is a pipe in the right descriptor */
 	if ((status = fstat (PIPE_WRITE_FD, &pipe_stat)) == 0 && S_ISFIFO(pipe_stat.st_mode)) {
 		/* tell jackstart we are up and running */
+
+  	        char c = 1;
+
+	        if (write (PIPE_WRITE_FD, &c, 1) != 1) {
+		        fprintf (stderr, "cannot write to jackstart sync pipe %d (%s)\n", PIPE_WRITE_FD, strerror (errno));
+	        }
+
 		if (close(PIPE_WRITE_FD) != 0) {
 			fprintf(stderr, "jackd: error on startup pipe close: %s\n", strerror (errno));
 		} else {

jackd/jackstart.c

@@ -203,7 +203,6 @@ int main(int argc, char **argv)
 	gid_t gid;
 	int pipe_fds[2];
 	int err;
-	char buf[1];
 
 	parent_pid = getpid ();
 
@@ -301,7 +300,22 @@ int main(int argc, char **argv)
 		close(PIPE_WRITE_FD);
 
 		/* wait for jackd to start */
-		while (read(PIPE_READ_FD, buf, sizeof(buf)) == -1 && errno == EINTR) { }
+		while (1) {
+		  	int ret;
+			char c;
+
+			/* picking up pipe closure is a tricky business. 
+			   this seems to work as well as anything else.
+			*/
+
+			ret = read(PIPE_READ_FD, &c, 1);
+			fprintf (stderr, "back from read, ret = %d errno == %s\n", ret, strerror (errno));
+			if (ret == 1) {
+			  break;
+			} else if (errno != EINTR) {
+			  break;
+			}
+		}
 
 		/* set privileges on jackd process */
 		if (give_capabilities (parent_pid) != 0) {