Moved back to 02_exercise

1 files changed, 36 insertions, 0 deletions

diff --git a/02_exercise/beispiele/fork_example/fork.c b/02_exercise/beispiele/fork_example/fork.c
new file mode 100644
index 0000000..7377b0f
--- /dev/null
+++ b/02_exercise/beispiele/fork_example/fork.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/wait.h>
+
+int main(void) {
+	pid_t proc_id;
+	int status = 0;
+	
+	proc_id = fork();
+	
+	if (proc_id < 0) {
+		fprintf(stderr, "fork error\n");
+		fflush(stderr);
+		return EXIT_FAILURE;
+	}
+	
+	if (proc_id == 0) {
+		/* child process */
+		printf("[child]  process id: %d\n", (int) getpid());
+		
+		char* args[] = {"sleep", "1", NULL};
+		execvp(args[0], args);
+		exit(-1);
+	}
+	else {
+		/* parent */
+		printf("[parent] process id: %d\n", (int) getpid());
+		pid_t child_id = wait(&status);
+		
+		printf("[parent] child %d returned: %d\n",
+		        child_id, WEXITSTATUS(status));
+	}
+	
+	return EXIT_SUCCESS;
+}