1 files changed, 32 insertions, 0 deletions
diff --git a/usr/klibc/exit.c b/usr/klibc/exit.c
new file mode 100644
index 0000000..2368b07
--- /dev/null
+++ b/usr/klibc/exit.c
@@ -0,0 +1,32 @@
+/*
+ * exit.c
+ *
+ * exit(), including the handling of the atexit chain.
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/syscall.h>
+#include "atexit.h"
+
+/* Link chain for atexit/on_exit */
+struct atexit *__atexit_list;
+
+__noreturn exit(int rv)
+{
+	struct atexit *ap;
+
+	for (ap = __atexit_list; ap; ap = ap->next) {
+		/* This assumes extra args are harmless.  They should
+		   be in all normal C ABIs, but if an architecture has
+		   some particularly bizarre ABI this might be worth
+		   watching out for. */
+		ap->fctn(rv, ap->arg);
+	}
+
+	/* Handle any library destructors if we ever start using them... */
+	fflush(NULL);
+
+	_exit(rv);
+}