--- incoherent_mmap.c.orig	2013-07-24 18:19:19.852549061 -0700
+++ incoherent_mmap.c	2013-07-24 18:21:20.779548719 -0700
@@ -22,15 +22,18 @@
         const char *fname = argv[1];
 	char c = 0;
 
-	if (pipe(tochild) != 0 || pipe(toparent) != 0)
+	if (pipe(tochild) != 0 || pipe(toparent) != 0) {
 		err(2, "Creating pipe");
+	}
 
-	if (!fname)
+	if (!fname) {
 		fname = DATA;
+	}
 
 	fd = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0600);
-	if (fd < 0)
+	if (fd < 0) {
 		err(2, "opening %s", fname);
+	}
 	unlink(fname);
 
 	switch (fork()) {
@@ -41,14 +44,16 @@
 		close(toparent[0]);
 
 		/* Wait for parent to create file. */
-		if (read(tochild[0], &c, 1) != 1)
+		if (read(tochild[0], &c, 1) != 1) {
 			err(2, "reading from parent");
+		}
 
 		/* Alter first byte. */
 		pwrite(fd, &c, 1, 0);
 
-		if (write(toparent[1], &c, 1) != 1)
+		if (write(toparent[1], &c, 1) != 1) {
 			err(2, "writing to parent");
+		}
 		exit(0);
 
 	default:
@@ -58,25 +63,31 @@
 		/* Create a file and mmap it. */
 		page = malloc(getpagesize());
 		memset(page, 0x42, getpagesize());
-		if (write(fd, page, getpagesize()) != getpagesize())
+		if (write(fd, page, getpagesize()) != getpagesize()) {
 			err(2, "writing first page");
+		}
 		map = mmap(NULL, getpagesize(), PROT_READ|PROT_WRITE,
 			   MAP_SHARED, fd, 0);
-		if (map == MAP_FAILED)
+		if (map == MAP_FAILED) {
 			err(2, "mapping file");
+		}
 
-		if (*map != 0x42)
+		if (*map != 0x42) {
 			errx(2, "first byte isn't 0x42!");
+		}
 
 		/* Tell child to alter file. */
-		if (write(tochild[1], &c, 1) != 1)
+		if (write(tochild[1], &c, 1) != 1) {
 			err(2, "writing to child");
+		}
 
-		if (read(toparent[0], &c, 1) != 1)
+		if (read(toparent[0], &c, 1) != 1) {
 			err(2, "reading from child");
+		}
 
-		if (*map)
+		if (*map) {
 			errx(0, "mmap incoherent: first byte isn't 0.");
+		}
 
 		exit(1);
 	}