1 files changed, 21 insertions, 0 deletions
diff --git a/sys/libc/strlen.c b/sys/libc/strlen.c
new file mode 100644
index 00000000..c6c2f813
--- /dev/null
+++ b/sys/libc/strlen.c
@@ -0,0 +1,21 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#define	import_libc
+#include <iraf.h>
+
+
+/* STRLEN -- Length of a string.
+*/
+int
+strlen (
+  char	*s
+)
+{
+	register char	*ip=s;
+
+	while (*ip++)
+	    ;
+
+	return (ip - s - 1);
+}