tty [OPTION]...
!subtitle:功能
查看连接到标准输入的终端文件名。
!subtitle:类型
可执行文件（/usr/bin/tty），属于 coreutils。
!subtitle:参数
OPTION 选项：
-s, --silent, --quiet - 不打印任何内容，仅通过返回值返回状态
--help - 显示帮助
--version - 显示版本
!subtitle:返回值
0 - 标准输入是终端
1 - 标准输入是非终端文件
2 - 参数错误
3 - 发生写错误
5 - 无法确认终端名称
$ tty
/dev/pts/7
TTY(1) User Commands TTY(1)
NAME
tty - print the file name of the terminal connected to standard input
SYNOPSIS
tty [OPTION]...
DESCRIPTION
Print the file name of the terminal connected to standard input.
-s, --silent, --quiet
print nothing, only return an exit status
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/tty>
or available locally via: info '(coreutils) tty invocation'
GNU coreutils 9.4 April 2024 TTY(1)