1 files changed, 60 insertions, 0 deletions
diff --git a/test/signalbychild.c b/test/signalbychild.c
new file mode 100644
index 0000000..462daf4
--- /dev/null
+++ b/test/signalbychild.c
@@ -0,0 +1,60 @@
+
+#include <signal.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+int volatile g_signal_need_exit = 0;
+int saved_ppid = 0;
+
+void signal_notify(int signum)
+{
+        if (saved_ppid == getpid()) {
+                
+                printf("parent got signal %d\n", signum);
+        }
+
+        g_signal_need_exit = 1;
+        
+}
+
+static void install_signal(void)
+{
+        struct sigaction sa;
+
+        sa.sa_handler = signal_notify;
+
+        if (sigaction(SIGINT, &sa, NULL) == -1) {
+                perror("sigaction");
+        }
+        
+}
+
+static void enter_eventloop(void)
+{
+        while(!g_signal_need_exit) {
+                
+        }
+        printf("thread exit\n");
+
+        _exit(0);
+        
+}
+
+int main(void)
+{
+        saved_ppid = getpid();
+        install_signal();
+
+        for(int i = 0; i < 5; i++) {
+                if (fork() == 0) {
+                        enter_eventloop();
+                        
+                        /* raise(SIGUSR1); */
+                        
+                }
+        }
+
+        while(wait(NULL) > 0);
+}
+\ No newline at end of file