isatty(1) fish isatty(1)
NAME
isatty - test if the specified file descriptor is a tty
Synopsis
isatty [FILE DESCRIPTOR]
where FILE DESCRIPTOR may be either the number of a file descriptor, or
one of the strings stdin, stdout and stderr.
If the specified file descriptor is a tty, the exit status of the
command is zero, otherwise, it is non-zero.
Version 1.23.1 8 Mar 2009 isatty(1)
fish 1.23.1 - Generated Sun Mar 8 14:10:04 CDT 2009