# HG changeset patch
# User Eric Blake <eblake@redhat.com>
# Date 1306280019 21600
# Node ID 3fe3b9fc9c12d668cb0cfc3fab3ddd42aa9b7e44
# Parent  a29ad2af0c293764cceed799819c542216862c16
docs: document recently fixed glibc printf bug

Document it as a known bug, but one where we don't provide a
workaround since programmers are unlikely to hit it in practice.

* doc/posix-functions/fprintf.texi (fprintf): Document it.
* doc/posix-functions/printf.texi (printf): Likewise.
* doc/posix-functions/vfprintf.texi (vfprintf): Likewise.
* doc/posix-functions/vprintf.texi (vprintf): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2011-05-24  Eric Blake  <eblake@redhat.com>
 
+	docs: document recently fixed glibc printf bug
+	* doc/posix-functions/fprintf.texi (fprintf): Document it.
+	* doc/posix-functions/printf.texi (printf): Likewise.
+	* doc/posix-functions/vfprintf.texi (vfprintf): Likewise.
+	* doc/posix-functions/vprintf.texi (vprintf): Likewise.
+
 	closein-tests: convert to init.sh
 	* modules/closein-tests (Files): Add init.sh
 	* tests/test-closein.sh Use it.
diff --git a/doc/posix-functions/fprintf.texi b/doc/posix-functions/fprintf.texi
--- a/doc/posix-functions/fprintf.texi
+++ b/doc/posix-functions/fprintf.texi
@@ -83,4 +83,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+Attempting to write to a read-only stream fails with @code{EOF} but
+does not set the error flag for @code{ferror} on some platforms:
+glibc 2.13.
 @end itemize
diff --git a/doc/posix-functions/printf.texi b/doc/posix-functions/printf.texi
--- a/doc/posix-functions/printf.texi
+++ b/doc/posix-functions/printf.texi
@@ -83,4 +83,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+Attempting to write to a read-only stream fails with @code{EOF} but
+does not set the error flag for @code{ferror} on some platforms:
+glibc 2.13.
 @end itemize
diff --git a/doc/posix-functions/vfprintf.texi b/doc/posix-functions/vfprintf.texi
--- a/doc/posix-functions/vfprintf.texi
+++ b/doc/posix-functions/vfprintf.texi
@@ -83,4 +83,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+Attempting to write to a read-only stream fails with @code{EOF} but
+does not set the error flag for @code{ferror} on some platforms:
+glibc 2.13.
 @end itemize
diff --git a/doc/posix-functions/vprintf.texi b/doc/posix-functions/vprintf.texi
--- a/doc/posix-functions/vprintf.texi
+++ b/doc/posix-functions/vprintf.texi
@@ -83,4 +83,8 @@
 
 Portability problems not fixed by Gnulib:
 @itemize
+@item
+Attempting to write to a read-only stream fails with @code{EOF} but
+does not set the error flag for @code{ferror} on some platforms:
+glibc 2.13.
 @end itemize