newlib-cygwin/newlib/libc/posix/_isatty.c

22 lines
302 B
C

/* isatty.c */
/* Dumb implementation so programs will at least run. */
#include <sys/stat.h>
#include <errno.h>
int
_isatty (int fd)
{
struct stat buf;
if (fstat (fd, &buf) < 0) {
errno = EBADF;
return 0;
}
if (S_ISCHR (buf.st_mode))
return 1;
errno = ENOTTY;
return 0;
}