3 files changed, 43 insertions(+), 1 deletions(-)

A forking.c
M mkfile
A qlock.c

@@ 0,0 1,17 @@
+#include <u.h>
+#include <libc.h>
+
+void
+main(void)
+{
+	QLock lock;
+
+	if(fork() == 0){
+		qlock(&lock);
+		exits(nil);
+	}else{
+		waitpid();
+		qlock(&lock);
+		exits(nil);
+	}
+}

@@ 6,7 6,9 @@ bins=\
 	spiral\
 	queuesrv\
 	pres\
-	ufx2font
+	ufx2font\
+	forking\
+	qlock
 
 all:VQ: `{echo $O.^$bins}
 

@@ 0,0 1,23 @@
+#include <u.h>
+#include <libc.h>
+
+QLock l;
+
+int
+on_note(void *, char *ty)
+{
+	fprint(2, "%d: note: %s\n", getpid(), ty);
+	return 0;
+}
+
+void
+main(int argc, char **argv)
+{
+	int pid;
+
+	atnotify(on_note, 1);
+
+	fork();
+
+	sleep(10000);
+}