| @node stderr |
| @section @code{stderr} |
| @findex stderr |
| |
| POSIX specification:@* @url{https://pubs.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 |
