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:
Quote arguments for use in error messages.

Files:
lib/quotearg.h
lib/quotearg.c
lib/quote.h
m4/mbstate_t.m4
m4/mbrtowc.m4
m4/quotearg.m4

Depends-on:
c-strcaseeq
extensions
gettext-h
mbrtowc
mbsinit
memcmp
minmax
quotearg-simple
localcharset
stdbool
stdint
wchar
wctype-h
xalloc

configure.ac:
gl_QUOTEARG

Makefile.am:
lib_SOURCES += quotearg.c

Include:
"quotearg.h"

License:
GPL

Maintainer:
Paul Eggert