检查文件所有者权限 [英] Checking file owner permissions

问题描述

我正在尝试测试文件是否在bash脚本中为所有者设置了执行位.

I'm trying to test if a file has the execute bit set for the owner in bash script.

我知道if [ -x filename ]检查运行该语句的用户的执行许可权，但我需要知道所有者是否拥有它.有没有办法指定所有者?

I know if [ -x filename ] checks for execute permission for the User running the statement but i need to know if the owner has it. Is there a way to specify owner?

推荐答案

您可以使用stat获取文件权限，然后使用另一个命令解析它们以获取所需的字符.

You can use stat to get the file permissions, and parse them with another command to get the character you want.

stat -c %A someFile

返回类似的内容

-rw-rw-r--

，开始:

stat -c %A someFile | sed 's/...\(.\).\+/\1/'

如果所有者已执行，则返回-或x.

Returns either - or x if the owner has execute.

为完成起见:

if [ `stat -c %A someFile | sed 's/...\(.\).\+/\1/'` == "x" ] 
then
  echo "Owner has execute permission!"
fi

:如果您希望使用数字权限:

EDIT 3: If you prefer numerical permissions:

stat -c %a /path/to/a/file将输出60​​0或700或任何3位以8为底的数字.

stat -c %a /path/to/a/file will output 600 or 700 or whatever 3 digit base-8 number.

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