bash 为什么bash无法识别套接字文件的存在
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Why can't bash recognize the existence of a socket file
提问by kramer65
On a Linux box I want to check if a specific socket file exists. I know the socket files exists, but my checks in bash don't show that to me:
在 Linux 机器上，我想检查是否存在特定的套接字文件。我知道套接字文件存在，但我在 bash 中的检查没有向我显示：
$ ls -l /var/run/supervisor.sock
srwxrw-rw- 1 root root 0 Jun 3 13:30 /var/run/supervisor.sock # <== THE FILE EXISTS!!
$ if [ ! -f /var/run/supervisor.sock ]; then echo 'file does not exist!'; fi
file does not exist!
Why oh why can't bash see that the file exists?
为什么哦为什么bash看不到文件存在？
回答by bodangly
http://www.tldp.org/LDP/abs/html/fto.html
http://www.tldp.org/LDP/abs/html/fto.html
Use -Sto test if its a socket. -fis for regular files.
使用-S测试如果一个插座。-f用于常规文件。
See man 1 test:
见man 1 test：
-e FILE
FILE exists
-f FILE
FILE exists and is a regular file
...
...
-S FILE
FILE exists and is a socket
