1 files changed, 35 insertions, 0 deletions
diff --git a/usr/klibc/daemon.c b/usr/klibc/daemon.c
new file mode 100644
index 0000000..61b88dd
--- /dev/null
+++ b/usr/klibc/daemon.c
@@ -0,0 +1,35 @@
+/*
+ * daemon.c - "daemonize" a process
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int daemon(int nochdir, int noclose)
+{
+	int nullfd;
+	pid_t f;
+
+	if (!nochdir) {
+		if (chdir("/"))
+			return -1;
+	}
+
+	if (!noclose) {
+		if ((nullfd = open("/dev/null", O_RDWR)) < 0 ||
+		    dup2(nullfd, 0) < 0 ||
+		    dup2(nullfd, 1) < 0 ||
+		    dup2(nullfd, 2) < 0)
+			return -1;
+		close(nullfd);
+	}
+
+	f = fork();
+	if (f < 0)
+		return -1;
+	else if (f > 0)
+		_exit(0);
+
+	return setsid();
+}