| 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. |
shell 判断文件内容是否改变
判断文件内容是否改变:
1)md5值判断
2)diff 判断
#添加日志时间戳
function fn_showlog()
{
local curtime;
curtime=`date +"%Y%m%d-%H:%M:%S"`
echo "$curtime ------ $1";
}
#判断文件内容是否一致
function diff_file(){
for file in `ls $1`
do
if [ ! -f "$2$file" ];then
fn_showlog "存在新增文件:$2$file"
return 0
else
diff $file $2$file
if [ $? -ne 0 ];then
fn_showlog "文件内容发生变化:$file"
return 0
fi
fi
done
return 1
}
diff_file "python*Ip" "/home/admin/tools/"
if [ $? -eq 0 ];then
fn_showlog "内容发生改变......"
else
fn_showlog "内容未发生改变,退出脚本!"
exit 0
fi
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