判斷文件是否存在的shell腳本代碼

2020-07-27 19:23:48

字體：大中小

供稿：網(wǎng)友

實(shí)現(xiàn)代碼一、

#!/bin/sh# 判斷文件是否存在# link：m.survivalescaperooms.com# date：2013/2/28myPath="/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 touch "$myFile"fi# 其他參數(shù)還有-n,-n是判斷一個(gè)變量是否是否有值if [ ! -n "$myVar" ]; then echo "$myVar is empty" exit 0fi# 兩個(gè)變量判斷是否相等if [ "$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 /myfolderfi#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 $folder 是否存在并且是否具有可執(zhí)行權(quán)限if [ ! -x "$folder"]; then mkdir "$folder"fi# -d 參數(shù)判斷 $folder 是否存在if [ ! -d "$folder"]; then mkdir "$folder"fi# -f 參數(shù)判斷 $file 是否存在if [ ! -f "$file" ]; then touch "$file"fi# -n 判斷一個(gè)變量是否有值if [ ! -n "$var" ]; then echo "$var is empty" exit 0fi# 判斷兩個(gè)變量是否相等if [ "$var1" = "$var2" ]; then echo '$var1 eq $var2'else echo '$var1 not eq $var2'fi

-f 和-e的區(qū)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.