mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-27 05:13:10 +00:00
29 lines
387 B
Fish
29 lines
387 B
Fish
|
|
function isatty -d "Tests if a file descriptor is a tty"
|
|
set -l fd 0
|
|
if count $argv >/dev/null
|
|
switch $argv[1]
|
|
|
|
case -h --h --he --hel --help
|
|
__fish_print_help isatty
|
|
return 0
|
|
|
|
case stdin
|
|
set fd 0
|
|
|
|
case stdout
|
|
set fd 1
|
|
|
|
case stderr
|
|
set fd 2
|
|
|
|
case '*'
|
|
set fd $argv[1]
|
|
|
|
end
|
|
end
|
|
|
|
eval "tty 0>&$fd >/dev/null"; and return 0
|
|
|
|
return 1
|
|
end
|