Add example of child status

Author: coditva

fork_this_shit/Makefile

@@ -1,16 +1,22 @@
 
 # Add all targets here
-all: simple_fork
+BINARIES=simple_fork child_status
+
+all: $(BINARIES)
 
 
-# A simple fork example
 simple_fork: simple_fork.o
 	gcc -o simple_fork simple_fork.o
-
 simple_fork.o: simple_fork.c
 	gcc simple_fork.c -c
 
 
+child_status: child_status.o
+	gcc -o child_status child_status.o
+child_status.o: child_status.c
+	gcc child_status.c -c
+
+
 .PHONY: clean
 clean:
-	rm -f *.o simple_fork
+	rm -f *.o $(BINARIES)

fork_this_shit/child_status.c

@@ -0,0 +1,25 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+    pid_t pid;
+    pid = fork();
+
+    /* child gets a pid of zero */
+    if (pid == 0) {
+        printf("%d: we're in the child\n", getpid());
+        exit(2);
+    } else {
+        pid = wait(NULL);
+        printf("%d: we're in the parent\n", getpid());
+        printf("%d: my child is: %d\n", getpid(), pid);
+        printf("%d: my child is dead now and wait returns %d\n",
+                getpid(), wait(NULL));
+    }
+
+    return 0;
+}