请注意,我不能在目标环境中使用“找到”
我需要在linux shell脚本中删除超过7天的所有文件.就像是：
FILES=./path/to/dir for f in $FILES do echo "Processing $f file..." # take action on each file. $f store current file name # perhaps stat each file to get the last modified date and then delete files with date older than today -7 days. done
我可以用’stat’来做这件事吗？我试图用
find *.gz -mtime +7 -delete
但发现我不能在目标系统上使用find(没有cron用户的权限,这不能更改).目标系统是Redhat Enterprise.
文件名的格式如下：
gzip> / mnt / target03 / rest-of-path / web / backups / DATABASENAME_date“％Y-％m-％d”.gz
解决方法
由于你在文件名中有时间,然后使用它来删除时间,这是一些代码：
此脚本获取自纪元以来的当前时间(以秒为单位),然后计算7天前的时间戳.然后,对于每个文件,解析文件名并将每个文件名中嵌入的日期转换为时间戳,然后比较时间戳以确定要删除的文件.使用时间戳消除了直接处理日期的所有麻烦(闰年,几个月不同的日子等)
#funciton to get timestamp X days prior to input timestamp
# arg1 = number of days past input timestamp
# arg2 = timestamp ( e.g. 1324505111 ) seconds past epoch
getTimestampDaysInPast () {
daysinpast=$1
seconds=$2
while [ $daysinpast -gt 0 ] ; do
daysinpast=`expr $daysinpast - 1`
seconds=`expr $seconds - 86400`
done
# make midnight
mod=`expr $seconds % 86400`
seconds=`expr $seconds - $mod`
echo $seconds
}
# get current time in seconds since epoch
getCurrentTime() {
echo `date +"%s"`
}
# parse format and convert time to timestamp
# e.g. 2011-12-23 -> 1324505111
# arg1 = filename with date string in format %Y-%m-%d
getFileTimestamp () {
filename=$1
date=`echo $filename | sed "s/[^0-9\-]*\([0-9\-]*\).*/\1/g"`
ts=`date -d $date | date +"%s"`
echo $ts
}
########################### MAIN ############################
# Expect directory where files are to be deleted to be first
# arg on commandline. If not provided then use current working
# directory
FILEDIR=`pwd`
if [ $# -gt 0 ] ; then
FILEDIR=$1
fi
cd $FILEDIR
now=`getCurrentTime`
mustBeBefore=`getTimestampDaysInPast 7 $now`
SAVEIFS=$IFS
# need this to loop around spaces with filenames
IFS=$(echo -en "\n\b")
# for safety change this glob to something more restrictive
for f in * ; do
filetime=`getFileTimestamp $f`
echo "$filetime lt $mustBeBefore"
if [ $filetime -lt $mustBeBefore ] ; then
# uncomment this when you have tested this on your system
echo "rm -f $f"
fi
done
# only need this if you are going to be doing something else
IFS=$SAVEIFS
