shell判断文件或文件夹是否存在

Bertha 。 2022-03-26 03:44 821阅读 0赞

shell命令判断文件或文件夹是否存在，先直接看实例：

\#!/bin/sh

\#判断文件存在，判断是否为文件夹等  
testPath="/Volumes/MacBookProHD/Mr.Wen/08 shell命令"  
testFile="/Volumes/MacBookProHD/Mr.Wen/08 shell命令/fileWen"

\#判断文件夹是否存在 -d  
if \[\[ ! -d "$testPath" \]\]; then  
    echo "文件夹不存在"  
else  
    echo "文件夹存在"  
fi

\#判断文件夹是否存在，并且具有可执行权限  
if \[\[ ! -x "$testFile" \]\]; then  
    echo "文件不存在并且没有可执行权限"  
else  
    echo "文件存在并有可执行权限"  
fi

\#判断文件是否存在  
if \[\[ ! -f "$testFile" \]\]; then  
    echo "文件不存在"  
else  
    echo "文件存在"  
fi  
在shell命令脚本编写当中，会遇到各种对文件的判断，除了以上常用的判断，还有其他的可以使用，如下：

Conditional Logic on Files
    -a file exists.
    -b file exists and is a block special file.
    -c file exists and is a character special file.
    -d file exists and is a directory.
    -e file exists (just the same as -a).
    -f file exists and is a regular file.
    -g file exists and has its setgid(2) bit set.
    -G file exists and has the same group ID as this process.
    -k file exists and has its sticky bit set.
    -L file exists and is a symbolic link.
    -n string length is not zero.
    -o Named option is set on.
    -O file exists and is owned by the user ID of this process.
    -p file exists and is a first in, first out (FIFO) special file or
    named pipe.
    -r file exists and is readable by the current process.
    -s file exists and has a size greater than zero.
    -S file exists and is a socket.
    -t file descriptor number fildes is open and associated with a
    terminal device.
    -u file exists and has its setuid(2) bit set.
    -w file exists and is writable by the current process.
    -x file exists and is executable by the current process.
    -z string length is zero.