X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=doc%2Fposix-functions%2Fputchar.texi;h=2ded45a2aed46b23f8bf51faf7a136054c08c999;hb=176cd193605775b290fee26568eec5d1ebd47f58;hp=e010ae2590c249845563001d31f4bcbb6b236f5a;hpb=09ef7461110822a3970aa8eebcfaa740996a82f2;p=gnulib.git

diff --git a/doc/posix-functions/putchar.texi b/doc/posix-functions/putchar.texi
index e010ae259..2ded45a2a 100644
--- a/doc/posix-functions/putchar.texi
+++ b/doc/posix-functions/putchar.texi
@@ -2,11 +2,20 @@
 @section @code{putchar}
 @findex putchar
 
-POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putchar.html}
+POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/putchar.html}
 
-Gnulib module: stdio, sigpipe
+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.
+@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
@@ -19,4 +28,8 @@ 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.
 @end itemize