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view doc/posix-functions/stderr.texi @ 40139:3bacbf659cc9
ttyname_r: Work around bug on Android 4.3.
* m4/ttyname_r.m4 (gl_FUNC_TTYNAME_R): Test whether ttyname_r is a stub.
* lib/ttyname_r.c (ttyname_r): Implement for Android.
* doc/posix-functions/ttyname_r.texi: Mention the Android bug.
* doc/posix-functions/ttyname.texi: Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 26 Jan 2019 11:56:31 +0100 |
parents | 65bc0f9b42bf |
children |
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@node stderr @section @code{stderr} @findex stderr POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/stderr.html} Gnulib module: --- Portability problems fixed by Gnulib: @itemize @end itemize Portability problems not fixed by Gnulib: @itemize @item stderr is created in 32-bit mode instead of 64-bit mode: Cygwin 1.5.x. One workaround is to use freopen(NULL, ``r+'', stderr) on Cygwin 1.5.21 or newer. Another is to use the gnulib @code{ftello} module and do ftello(stderr). @item POSIX states that a setuid application can guarantee that fd 2 is open, but some systems guarantee this even for non-setuid programs. If an application is executed with fd 2 closed, use of @code{stderr} can affect an unrelated file that happened to be assigned to fd 2. The gnulib *-safer modules may be used to guarantee that fd 2 stays reserved for @code{stderr}. @end itemize