请教，如何判断是否在X-windows下

dunerunner

请问如何判断是否在X-windows下？如果是判断进程的话，哪个进程最保险？

yongjian

I would just do

1. ps -aef|grep X

复制代码

, but the problem is if you ctrl-alt-F1 or go to other vts, you will still be able to grab X but you are not actually under X.

dunerunner

多谢版主~~~英文~~汗

晨想

pgrep X 也可以，如果有这个命令。

eieng

可以试试这个
不断查找父进程,存在 xinit 这个父进程便说明在 X 下

1. 
   
2. #!/bin/bash
   
3. 
   
4. ppid=$(awk '/^PPid/{print $2}' /proc/$$/status)
   
5. ppname=$(awk '/^Name/{print $2}' /proc/$ppid/status)
   
6. 
   
7. while [[ $ppname != "init" && $ppname != "xinit" ]]
   
8. do
   
9.     ppid=$(awk '/^PPid/{print $2}' /proc/$ppid/status)
   
10.     ppname=$(awk '/^Name/{print $2}' /proc/$ppid/status)
    
11. done
    
12. 
    
13. [[ $ppname = "xinit" ]] && echo -e "You are under X\n" && exit
    
14. echo -e "You are not under X\n"
    

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windrose

test x"$DISPLAY" = x""

晨想

但是 ssh 好像也会自动设置 DISPLAY 的。

yongjian

Post by 终极幻想
但是 ssh 好像也会自动设置 DISPLAY 的。

不会，除非你配置了forward x11选项。不过检测DISPLAY的值确实不一定正确。

晨想

我家里的2台机器，是用 X11 forward。。呵呵。。

soccer

Post by yongjian
I would just do

1. ps -aef|grep X

复制代码

, but the problem is if you ctrl-alt-F1 or go to other vts, you will still be able to grab X but you are not actually under X.

vts 是 指终端virtual terminal s..... ?

谢谢