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-rw-r--r--lib/libc/gen/isascii.310
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/libc/gen/isascii.3 b/lib/libc/gen/isascii.3
index a8d4f3f5a76..f4b089dbe36 100644
--- a/lib/libc/gen/isascii.3
+++ b/lib/libc/gen/isascii.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: isascii.3,v 1.7 1999/07/09 13:35:17 aaron Exp $
+.\" $OpenBSD: isascii.3,v 1.8 2001/06/25 03:23:57 pjanzen Exp $
.\"
.\" Copyright (c) 1989, 1991 The Regents of the University of California.
.\" All rights reserved.
@@ -76,3 +76,11 @@ The
.Fn isascii
function conforms to
.St -xpg4 .
+.Sh CAVEATS
+The argument to
+.Fn isascii
+must be
+.Dv EOF
+or representable as an
+.Li unsigned char ;
+otherwise, the result is undefined.