On 11/08/11 03:33, Bruno Haible wrote: > The fact that isatty() always sets errno in glibc is undocumented:
Amusingly enough, this *is* documented in the GNU/Linux man page <http://www.kernel.org/doc/man-pages/online/pages/man3/isatty.3.html>: isatty() returns 1 if fd is an open file descriptor referring to a terminal; otherwise 0 is returned, and errno is set to indicate the error. So in this case we have dueling documentation. If I were writing the code I would just leave gnulib alone, as Bruno suggests, but I find it hard to argue against a more activist approach in which gnulib supports the documented GNU/Linux behavior.
