--- shared_mmap.c.orig	2013-07-16 15:58:02.949981134 -0700
+++ shared_mmap.c	2013-07-24 18:10:24.963548970 -0700
@@ -22,7 +22,9 @@
 	int fd = open(DATA,O_RDWR|O_CREAT|O_TRUNC,0666);
 	int count=7;
 
-	if (fd == -1) exit(1);
+	if (fd == -1) {
+		exit(1);
+	}
 
 	for (i=0;i<10000;i++) {
 		write(fd,&i,sizeof(i));
@@ -32,37 +34,56 @@
 
 	if (fork() == 0) {
 		fd = open(DATA,O_RDWR);
-		if (fd == -1) exit(1);
+		if (fd == -1) {
+			exit(1);
+		}
 
 		buf = (int *)mmap(NULL, 10000*sizeof(int), 
 				   (PROT_READ | PROT_WRITE), 
 				   MAP_FILE | MAP_SHARED, 
 				   fd, 0);
 
-		while (count-- && buf[9124] != 55732) sleep(1);
-
-		if (count <= 0) exit(1);
+		if (buf == MAP_FAILED) {
+			exit(1);
+		}
+
+		while (count-- && buf[9124] != 55732) {
+			sleep(1);
+		}
+
+		if (count <= 0) {
+			exit(1);
+		}
 
 		buf[1763] = 7268;
 		exit(0);
 	}
 
 	fd = open(DATA,O_RDWR);
-	if (fd == -1) exit(1);
+	if (fd == -1) {
+		exit(1);
+	}
 
 	buf = (int *)mmap(NULL, 10000*sizeof(int), 
 			   (PROT_READ | PROT_WRITE), 
 			   MAP_FILE | MAP_SHARED, 
 			   fd, 0);
 
-	if (buf == (int *)-1) exit(1);
+	if (buf == MAP_FAILED) {
+		exit(1);
+	}
 
 	buf[9124] = 55732;
 
-	while (count-- && buf[1763] != 7268) sleep(1);
+	while (count-- && buf[1763] != 7268) {
+		sleep(1);
+	}
 
 	unlink(DATA);
 		
-	if (count > 0) exit(0);
+	if (count > 0) {
+		exit(0);
+	}
+
 	exit(1);
 }