Module sys 

Constants

AT_EACCESS

Check access using effective user and group ID.

AT_EMPTY_PATH

Non-POSIX, see https://www.man7.org/linux/man-pages/man2/link.2.html.

AT_FDCWD

Use the current working directory to determine the target of relative file paths.

AT_REMOVEDIR

Remove directory instead of file.

AT_SYMLINK_FOLLOW

Follow symbolic link.

AT_SYMLINK_NOFOLLOW

Do not follow symbolic links.

FD_CLOEXEC

Close the file descriptor upon execution of an exec family function and in the new process image created by posix_spawn() or posix_spawnp().