signal test

c_expert/chapter7/jmp_restore.c

@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <setjmp.h>
+#include <signal.h>
+
+jmp_buf buf;
+
+void handler(int s)
+{
+	if (s == SIGINT) printf("now got a SIGINT signal\n");
+	longjmp(buf, 1);
+	/*  没有到达 */
+}
+
+int main(void)
+{
+
+	signal(SIGINT, handler);
+	if (setjmp(buf))
+	{
+		printf("back in main \n");
+		return 0;
+	}
+	else
+	{
+		printf("first time through\n");
+	}
+	loop:
+		goto loop;
+	return 0;
+}