dup2, dup3: work around another cygwin crasher

[gnulib.git] / doc / posix-functions / fwrite.texi

diff --git a/doc/posix-functions/fwrite.texi b/doc/posix-functions/fwrite.texi
index cfdc186..73b5427 100644 (file)
--- a/doc/posix-functions/fwrite.texi
+++ b/doc/posix-functions/fwrite.texi
@@ -2,12 +2,25 @@
 @section @code{fwrite}
 @findex fwrite
 
-POSIX specification: @url{http://www.opengroup.org/susv3xsh/fwrite.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fwrite.html}
 
-Gnulib module: ---
+Gnulib module: stdio, nonblocking, sigpipe
 
-Portability problems fixed by Gnulib:
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{nonblocking}:
 @itemize
+@item
+When writing to a non-blocking pipe whose buffer is full, this function fails
+with @code{errno} being set to @code{ENOSPC} instead of @code{EAGAIN} on some
+platforms:
+mingw, MSVC 9.
+@end itemize
+
+Portability problems fixed by Gnulib module @code{stdio}, together with module @code{sigpipe}:
+@itemize
+@item
+When writing to a pipe with no readers, this function fails, instead of
+obeying the current @code{SIGPIPE} handler, on some platforms:
+mingw, MSVC 9.
 @end itemize
 
 Portability problems not fixed by Gnulib:
@@ -15,4 +28,14 @@ Portability problems not fixed by Gnulib:
 @item
 On Windows platforms (excluding Cygwin), this function does not set @code{errno}
 upon failure.
+@item
+On some platforms, this function does not set @code{errno} or the
+stream error indicator on attempts to write to a read-only stream:
+Cygwin 1.7.9.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
 @end itemize