posix-io/isatty.c

#include <windows.h>

// To avoid stack corruptions
typedef struct {
	DWORD	dwFileAttributes;
	FILETIME	ftCreationTime;
	FILETIME	ftLastAccessTime;
	FILETIME	ftLastWriteTime;
	DWORD	dwVolumeSerialNumber;
	DWORD	nFileSizeHigh;
	DWORD	nFileSizeLow;
	DWORD	nNumberOfLinks;
	DWORD	nFileIndexHigh;
	DWORD	nFileIndexLow;
//#ifdef _WIN32_WCE
	DWORD	dwOID;		// Newer version of Windows CE have this member
//#endif
} BY_HANDLE_FILE_INFORMATION_NEW;

int isatty(int fd) {
	BY_HANDLE_FILE_INFORMATION_NEW information;
	if(fd == -1) return 0;
	return !GetFileInformationByHandle((void *)fd, (BY_HANDLE_FILE_INFORMATION *)&information);
}