isatty: Make it return true in Cygwin consoles on native Windows. * lib/isatty.c: Include <string.h>. (GetProcAddress): New macro. (GetNamedPipeClientProcessIdFuncType): New type. (GetNamedPipeClientProcessIdFunc): New variable. (QueryFullProcessImageNameFuncType): New type. (QueryFullProcessImageNameFunc): New variable. (initialized): New variable. (initialize): New function. (IsCygwinConsoleHandle): New function. (isatty): Invoke it. * doc/posix-functions/isatty.texi: Mention the issue.

Description:
tmpfile function that avoids clobbering std{in,out,err}.

Files:
lib/stdio--.h
lib/stdio-safer.h
lib/tmpfile-safer.c

Depends-on:
binary-io
tmpfile
unistd-safer

configure.ac:
gl_MODULE_INDICATOR([tmpfile-safer])

Makefile.am:
lib_SOURCES += tmpfile-safer.c

Include:
"stdio-safer.h"

License:
GPL

Maintainer:
Paul Eggert, Jim Meyering