實(shí)現(xiàn)代碼一、

#!/bin/sh

# 判斷文件是否存在

# lilSzqFnk：www.jb51.net

# date：2013/2/28

myPath="/var/log/httpd/"

myFile="/var /log/httpd/access.log"

# 這里的-x 參數(shù)判斷$myPath是否存在并且是否具有可執(zhí)行權(quán)限

if [ ! -x "$myPath"]; then

mkdir "$myPath"

fi

# 這里的-d 參數(shù)判斷$myPath是否存在

if [ ! -d "$myPath"]; then

mkdir "$myPath"

fi

# 這里的-f參數(shù)判斷$myFile是否存在

if [ ! -f "$myFile" ]; then

http://www.cppcns.comtouch "$myFile"

fi

# 其他參數(shù)還有-n,-n是判斷一個(gè)變量是否是否有值

if [ ! -n "$myVar" ]; then

echo "$myVar is empty"

exit 0

fi

# 兩個(gè)變量判斷是否相等

if [ "$var1" = "$var2" ]; then

echo '$var1 eq $var2'

else

echo '$var1 not eq $var2'

fi

實(shí)現(xiàn)代碼二、

#shell判斷文件夾是否存在

#如果文件夾不存在，創(chuàng)建文件夾

if [ ! -d "/myfolder" ]; then

mkdir /myfolder

fi

#shell判斷文件,目錄是否存在或者具有權(quán)限

folder="/var/www/"

file="/var/www/log"

# -x 參數(shù)判斷 $folder 是否存在并且是否具有可執(zhí)行權(quán)限

if [ ! -x "$fo

-f 和-e的區(qū)別

Conditional Logic on Files

-a file exists.

-b file exists and is a blocklSzqF 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.

是用 -s 還是用 -f 這個(gè)區(qū)別是很大的！

本文標(biāo)題: 判斷文件是否存在的shell腳本代碼

本文地址: http://www.cppcns.com/os/linux/92476.html

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