Fix description of user provided write function

[BZ #2074] * stdio.texi (Hook Functions): The user provided writer function is not allowed to return -1.
rossilxx · Apr 12, 2012 · 247c3ed · 247c3ed
1 parent 55939d6
commit 247c3ed
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,9 @@
+2012-04-12  Petr Baudis  <[email protected]>
+
+	[BZ #2074]
+	* stdio.texi (Hook Functions): The user provided writer function
+	is not allowed to return -1.
+
 2012-04-11  David S. Miller  <[email protected]>
 
 	* sysdeps/sparc/fpu/libm-test-ulps: Update.

diff --git 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: