1 files changed, 26 insertions, 0 deletions
diff --git a/sys/libc/index.c b/sys/libc/index.c
new file mode 100644
index 00000000..fa7a4917
--- /dev/null
+++ b/sys/libc/index.c
@@ -0,0 +1,26 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+*/
+
+#define	import_libc
+#define	import_spp
+#include <iraf.h>
+
+
+/* INDEX -- Search string STR for char CH, returning a pointer to the first
+** occurrence of CH in STR or NULL.
+*/
+char *
+index (
+  char	*str,			/* string to be searched		*/
+  int	ch			/* character we are searching for	*/
+)
+{
+	register char	*ip = str;
+
+	do {
+	    if (*ip == ch)
+		return (ip);
+	} while (*ip++);
+
+	return ((char *) NULL);
+}