1 files changed, 26 insertions, 0 deletions
diff --git a/sys/libc/cfnextn.c b/sys/libc/cfnextn.c
new file mode 100644
index 00000000..9917b89f
--- /dev/null
+++ b/sys/libc/cfnextn.c
@@ -0,0 +1,26 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+*/
+
+#define import_spp
+#define	import_libc
+#define import_xnames
+#include <iraf.h>
+
+
+/* C_FNEXTN -- Extract the filename extension substring from a filename.
+*/
+int
+c_fnextn (
+  char	*vfn,			/* filename			*/
+  char	*extn,			/* filename extension (output)	*/
+  int	maxch			/* max chars out		*/
+)
+{
+	XCHAR	spp_extn[SZ_FNAME+1];
+	XINT	x_maxch = SZ_FNAME, nchars;
+
+	nchars = (int) FNEXTN (c_sppstr(vfn), spp_extn, &x_maxch);
+	c_strpak (spp_extn, extn, maxch);
+
+	return (nchars);
+}