shell判断文件,目录是否存在或者具有权限

 

from : http://blog.youkuaiyun.com/ShowMan/archive/2009/07/25/4379490.aspx   shell判断文件,目录是否存在或者具有权限

#!/bin/sh myPath="/var/log/httpd/" myFile="/var /log/httpd/access.log"   #这里的-x 参数判断$myPath是否存在并且是否具有可执行权限 if [ ! -x "$myPath"]; then mkdir "$myPath" fi   #这里的-d 参数判断$myPath是否存在 if [ ! -d "$myPath"]; then mkdir "$myPath" fi   #这里的-f参数判断$myFile是否存在 if [ ! -f "$myFile" ]; then touch "$myFile" fi   #其他参数还有-n,-n是判断一个变量是否是否有值 if [ ! -n "$myVar" ]; then echo "$myVar is empty" exit 0 fi   #两个变量判断是否相等 if [ "$var1" = "$var2" ]; then echo '$var1 eq $var2' else echo '$var1 not eq $var2' fi   ＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝   from :http://blog.youkuaiyun.com/wenjjing2lianee/archive/2010/05/29/5633251.aspx #判断文件目录是否为空 第一种: emptydir.sh ----------------------------------------------------------- #!/bin/sh DIRECTORY=$1 if [ "`ls -A $DIRECTORY`" = "" ]; then   echo "$DIRECTORY is indeed empty" else   echo "$DIRECTORY is not empty" fi ----------------------------------------------------------- 第二种: count.sh ----------------------------------------------------------- #!/bin/sh count=`ls $*|wc -w` if [ "$count" > "0" ]; then  echo "file size $count" else  echo "empty!" fi ----------------------------------------------------------- #目录是否存在 ifmkdir.sh ----------------------------------------------------------- #!/bin/sh dir="test" if [ ! -d $dir ]; then         echo "$dir not exists"         mkdir "$dir" else         echo "$dir exists!" fi -----------------------------------------------------------