Initial commit

Lab4/ex1.c

@@ -0,0 +1,51 @@
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+
+int main(void) {
+/*
+
+    int n = 4;
+
+    for (int i = 0; i < 10   ; i++) {
+        pid_t pid1 =  fork();
+        printf("PID:%d n:%d &n:%d\n", pid1, n, &n);
+    }
+*/
+    pid_t pid = fork();
+
+    if (pid == 0) {
+        printf("PID1: %d\n", getpid());
+    }
+
+    else {
+        sleep(3);
+        printf("PPID: %d\n", getpid());
+    }
+
+    if (pid != 0) {
+        sleep(3);
+        kill(pid, SIGKILL);
+        wait(NULL);
+    }
+
+    pid_t pid_2 = fork();
+
+    if (pid_2 == 0) {
+        printf("PID2: %d\n", getpid());
+    }
+
+    else {
+        printf("PPID: %d\n", getpid());
+    }
+
+    if (pid == 0) {
+        sleep(3);
+        kill(getppid(), SIGKILL);
+    }
+
+    return 0;
+
+}