git-daemon: Avoid leaking the listening sockets into child processes.

This makes it possible to restart git-daemon even if some children are
still running.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

daemon.c

@@ -773,6 +773,7 @@ static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
 	char pbuf[NI_MAXSERV];
 	struct addrinfo hints, *ai0, *ai;
 	int gai;
+	long flags;
 
 	sprintf(pbuf, "%d", listen_port);
 	memset(&hints, 0, sizeof(hints));
@@ -820,6 +821,10 @@ static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
 			continue;	/* not fatal */
 		}
 
+		flags = fcntl(sockfd, F_GETFD, 0);
+		if (flags >= 0)
+			fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
+
 		socklist = xrealloc(socklist, sizeof(int) * (socknum + 1));
 		socklist[socknum++] = sockfd;
 
@@ -839,6 +844,7 @@ static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
 {
 	struct sockaddr_in sin;
 	int sockfd;
+	long flags;
 
 	memset(&sin, 0, sizeof sin);
 	sin.sin_family = AF_INET;
@@ -871,6 +877,10 @@ static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
 		return 0;
 	}
 
+	flags = fcntl(sockfd, F_GETFD, 0);
+	if (flags >= 0)
+		fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
+
 	*socklist_p = xmalloc(sizeof(int));
 	**socklist_p = sockfd;
 	return 1;