change OS name

System2/create_ps/main.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main()
+{
+  pid_t fpid;
+
+  fpid = fork();
+  // create child process
+  if (fpid == -1)
+  {
+    perror("perror in fork!");
+    exit(EXIT_FAILURE);
+  }
+
+  if (fpid == 0)
+  {
+    printf("I am the child process, my process id is %d\n", getpid());
+    sleep(1);
+    printf("child process DONE\n");
+    exit(EXIT_SUCCESS);
+  }
+  else
+  {
+    printf("I am the parent process, my process id is %d\n", getpid());
+    wait(NULL);
+    printf("parent process DONE\n");
+    exit(EXIT_SUCCESS);
+  }
+  exit(EXIT_SUCCESS);
+}