Create testSig.c

to see how to send signal from one process to another

testSig.c

@@ -0,0 +1,26 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+void sigint()
+{
+    signal(SIGINT, sigint);
+    printf("sigint received\n");
+}
+void main ()
+{
+    int pid;
+    pid = fork();
+//    printf("pid = %d:", pid);
+    if (!pid) {
+        printf("child pid = %d(%d)\n", getpid(), pid);
+        signal(SIGINT, sigint);
+        while(1);
+    } else {
+        printf("parent pid = %d\n", getpid());
+        printf("sending SIGINT\n");
+        kill(pid, SIGINT);
+    }
+}