[PATCH] docs: document recently fixed glibc printf bug

[Eric Blake]

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 <address@hidden>
---
 ChangeLog                         |    6 ++++++
 doc/posix-functions/fprintf.texi  |    4 ++++
 doc/posix-functions/printf.texi   |    4 ++++
 doc/posix-functions/vfprintf.texi |    4 ++++
 doc/posix-functions/vprintf.texi  |    4 ++++
 5 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 6ac14e8..270866e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2011-05-24  Eric Blake  <address@hidden>

+       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
index 04c4c72..44bcca3 100644
--- a/doc/posix-functions/fprintf.texi
+++ b/doc/posix-functions/fprintf.texi
@@ -83,4 +83,8 @@ fprintf

 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
+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
index df7813f..8fc8cb0 100644
--- a/doc/posix-functions/printf.texi
+++ b/doc/posix-functions/printf.texi
@@ -83,4 +83,8 @@ printf

 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
+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
index b40a334..c6fab25 100644
--- a/doc/posix-functions/vfprintf.texi
+++ b/doc/posix-functions/vfprintf.texi
@@ -83,4 +83,8 @@ vfprintf

 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
+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
index 342d182..21d4bc6 100644
--- a/doc/posix-functions/vprintf.texi
+++ b/doc/posix-functions/vprintf.texi
@@ -83,4 +83,8 @@ vprintf

 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
+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
-- 
1.7.4.4