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Diffstat (limited to 'manual/stdio.texi')
| -rw-r--r-- | manual/stdio.texi | 3 |
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: |