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-rw-r--r--manual/stdio.texi4
1 files changed, 3 insertions, 1 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi
index bbd3061..8051603 100644
--- a/manual/stdio.texi
+++ b/manual/stdio.texi
@@ -216,7 +216,9 @@ exists, @code{fopen} fails rather than opening it. If you use
file. This is equivalent to the @code{O_EXCL} option to the
@code{open} function (@pxref{Opening and Closing Files}).
-The @samp{x} modifier is part of @w{ISO C11}.
+The @samp{x} modifier is part of @w{ISO C11}, which says the file is
+created with exclusive access; in @theglibc{} this means the
+equivalent of @code{O_EXCL}.
@end table
The character @samp{b} in @var{opentype} has a standard meaning; it