Linux 我怎样才能回显到 /dev/tty？
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How can I echo to /dev/tty?
提问by inselberg
Is there a way to send something like an "end of data" after executing
有没有办法在执行后发送类似“数据结束”的内容
echo "test" > /dev/tty1
echo "test" > /dev/tty1
in order to gain the "input cursor" back to "receiving" terminal (in this case tty1)?
为了将“输入光标”返回到“接收”终端（在本例中为 tty1）？
Screenshot: http://picload.org/image/acdwigg/tty.png
采纳答案by Reishin
Using echo > /dev/ttyyou can't achieve that. But you can do that by sending a signal to process which are using that tty.
使用echo > /dev/tty你无法实现。但是您可以通过向正在使用该 tty 的进程发送信号来做到这一点。
For example:
例如：
kill -s SIGINT `ps -ft pts/2 | grep pts/2 | cut -d ' ' -f 5`
回答by Steven Penny
$ echo "test" > /dev/tty
test
Cygwin supports the following character devices commonly found on POSIX systems: /dev/tty The current controlling tty of a session.
回答by blue
You cannot do it like that.
The '>' redirection operator makes it so that for the WHOLE execution time standard input IS the echocommand, and you can't just change it later.
你不能那样做。'>' 重定向运算符使得整个执行时间的标准输入是echo命令，您不能稍后更改它。
You might want to rethink your needs and implementation.
您可能需要重新考虑您的需求和实施。
回答by LinconFive
centos will print out your string in the console you select
centos 将在您选择的控制台中打印出您的字符串
#run on pts/8
[root@C203-ATC ONT]# uname -a
Linux C203-ATC 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@C203-ATC ONT]# echo "test" > /dev/pts/3
[root@C203-ATC ONT]#
[root@C203-ATC BASIC]# tty
/dev/pts/3
#checked on pts/3
[root@C203-ATC BASIC]# test
(cursor)
#cursor pending ...
