File mcstrans-writepid.patch of Package mcstrans

Index: mcstrans-2.7/src/mcstransd.c
===================================================================
--- mcstrans-2.7.orig/src/mcstransd.c
+++ mcstrans-2.7/src/mcstransd.c
@@ -14,6 +14,7 @@
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <fcntl.h>
 #include <sys/uio.h>
 #include <sys/un.h>
 #include "mcstrans.h"
@@ -62,7 +63,7 @@ static int sockfd = -1;	/* socket we are
 static volatile int restart_daemon = 0;
 static void cleanup_exit(int ret) __attribute__ ((noreturn));
 static void
-cleanup_exit(int ret) 
+cleanup_exit(int ret)
 {
 	finish_context_colors();
 	finish_context_translations();
@@ -152,7 +153,7 @@ process_request(int fd, uint32_t functio
 	/* TODO: Check if MLS clearance (in peercon) dominates the MLS label
 	 * (in the request input).
 	 */
-  
+
 	switch (function) {
 	case SETRANS_INIT:
 		result = 0;
@@ -231,7 +232,7 @@ service_request(int fd)
 	data1 = malloc(data1_size);
 	if (!data1) {
 		log_debug("Could not allocate %d bytes\n", data1_size);
-		return -1; 
+		return -1;
 	}
 	data2 = malloc(data2_size);
 	if (!data2) {
@@ -542,6 +543,30 @@ static void usage(char *program)
 	printf("%s [-f] [-h] \n", program);
 }
 
+static const char *pidfile = "/var/run/mcstransd.pid";
+
+static int write_pid_file(void)
+{
+	int pidfd, len;
+	char val[16];
+
+	len = snprintf(val, sizeof(val), "%u\n", getpid());
+	if (len < 0) {
+		syslog(LOG_ERR, "Pid error (%s)", strerror(errno));
+		pidfile = 0;
+		return 1;
+	}
+	pidfd = open(pidfile, O_CREAT | O_TRUNC | O_NOFOLLOW | O_WRONLY, 0644);
+	if (pidfd < 0) {
+		syslog(LOG_ERR, "Unable to set pidfile (%s)", strerror(errno));
+		pidfile = 0;
+		return 1;
+	}
+	(void)write(pidfd, val, (unsigned int)len);
+	close(pidfd);
+	return 0;
+}
+
 int
 main(int argc, char *argv[])
 {
@@ -585,6 +610,8 @@ main(int argc, char *argv[])
 	}
 #endif
 
+	write_pid_file();
+
 	syslog(LOG_NOTICE, "%s initialized", argv[0]);
 	process_connections();