OpenBSD documentation

dev/c system dev rev

1 files changed, 40 insertions, 0 deletions

diff --git a/dev/c/src/fork/fork_exec.c b/dev/c/src/fork/fork_exec.c
new file mode 100644
index 0000000..7f87c84
--- /dev/null
+++ b/dev/c/src/fork/fork_exec.c
@@ -0,0 +1,40 @@
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+int main(){ 
+
+	pid_t cpid,ppid;
+	char errbuf[1024];
+
+	char *prog = "vim";
+	char *const args[3]= {"vim", "fork_exec.c", NULL};
+
+	cpid = fork();
+	if (cpid == -1) {
+		(void) snprintf(errbuf, sizeof(errbuf),
+				"fork: %s", strerror(errno));
+		printf("%s\n", errbuf);
+		exit(1);
+	}
+
+	if (cpid == 0) {	
+		//child
+		ppid = getppid();
+		if(ppid == 1){
+			printf("parent died ?\n");
+			_exit(1);
+		}
+		execvp(prog, args);
+		_exit(0);
+	}
+/* parent */
+	wait(NULL);
+	printf("Child id: %i\n", cpid);
+	return 0;
+}
+