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authorPetr Baudis <pasky@ucw.cz>2012-04-12 21:00:49 +0200
committerAndreas Jaeger <aj@suse.de>2012-04-12 21:00:49 +0200
commit247c3ede396bf000b6e095e5d2b361aa329fc180 (patch)
tree7b44875951a3bc3b25fba3cc4647540eda325e0b /manual
parent55939d6d451a357b0af1f74c03a003e844170720 (diff)
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Fix description of user provided write function
	[BZ #2074]
	* stdio.texi (Hook Functions): The user provided writer function
	is not allowed to return -1.
Diffstat (limited to 'manual')
-rw-r--r--manual/stdio.texi3
1 files changed, 2 insertions, 1 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi
index e870afb163..c58ca22b2d 100644
--- a/manual/stdio.texi
+++ b/manual/stdio.texi
@@ -5021,7 +5021,8 @@ ssize_t @var{writer} (void *@var{cookie}, const char *@var{buffer}, size_t @var{
 This is very similar to the @code{write} function; see @ref{I/O
 Primitives}.  Your function should transfer up to @var{size} bytes from
 the buffer, and return the number of bytes written.  You can return a
-value of @code{-1} to indicate an error.
+value of @code{0} to indicate an error.  You must not return any
+negative value.
 
 You should define the function to perform seek operations on the cookie
 as: