判斷文件是否存在的shell腳本代碼

2019-10-26 18:36:39

字體：大中小

來源：轉載

供稿：網友

實現代碼一、

#!/bin/sh# 判斷文件是否存在# link：www.jb51.net# date：2013/2/28myPath="/var/log/httpd/"myFile="/var /log/httpd/access.log"# 這里的-x 參數判斷$myPath是否存在并且是否具有可執行權限if [ ! -x "$myPath"]; then mkdir "$myPath"fi# 這里的-d 參數判斷$myPath是否存在if [ ! -d "$myPath"]; then mkdir "$myPath"fi# 這里的-f參數判斷$myFile是否存在if [ ! -f "$myFile" ]; then touch "$myFile"fi# 其他參數還有-n,-n是判斷一個變量是否是否有值if [ ! -n "$myVar" ]; then echo "$myVar is empty" exit 0fi# 兩個變量判斷是否相等if [ "$var1" = "$var2" ]; then echo '$var1 eq $var2'else echo '$var1 not eq $var2'fi

實現代碼二、

#shell判斷文件夾是否存在#如果文件夾不存在，創建文件夾if [ ! -d "/myfolder" ]; then mkdir /myfolderfi#shell判斷文件,目錄是否存在或者具有權限folder="/var/www/"file="/var/www/log"# -x 參數判斷 $folder 是否存在并且是否具有可執行權限if [ ! -x "$folder"]; then mkdir "$folder"fi# -d 參數判斷 $folder 是否存在if [ ! -d "$folder"]; then mkdir "$folder"fi# -f 參數判斷 $file 是否存在if [ ! -f "$file" ]; then touch "$file"fi# -n 判斷一個變量是否有值if [ ! -n "$var" ]; then echo "$var is empty" exit 0fi# 判斷兩個變量是否相等if [ "$var1" = "$var2" ]; then echo '$var1 eq $var2'else echo '$var1 not eq $var2'fi

-f 和-e的區別

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.