Last minute tweaks for lecture.

Author: Margo

shell3/data.out

@@ -1 +1 @@
-PARENTPARENTchildPARENTchildPARENTchildPARENTchildPARENTchildPARENTPARENTPARENTPARENTchildchildchildchildchild
+childchildchildchildchildchildchildchildchildchildRENTPARENT

shell3/own.c

@@ -14,7 +14,7 @@ int main(int argc, char *argv[]) {
 	// We want the parent and child to each have their own file descriptor.
 	// So, we will create the file in the parent and then close it; then
 	// we'll open it after the fork.
-	int fd = open("data.out", O_CREAT | O_WRONLY, 0644);
+	int fd = open("data.out", O_CREAT | O_WRONLY | O_TRUNC, 0644);
 	if (fd < 0)
 		exit(1);
 	close(fd);

shell3/share.c

@@ -13,7 +13,7 @@ int main(int argc, char *argv[]) {
 
 	// We want the parent and child to share the file descriptor
 	// so we are going to open it BEFORE forking
-	int fd = open("data.out", O_CREAT | O_WRONLY, 0644);
+	int fd = open("data.out", O_CREAT | O_WRONLY | O_TRUNC, 0644);
 	if (fd < 0)
 		exit(1);