如何在没有find的情况下在linux shell脚本中根据日期查找和删除文件？

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

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)

实际删除已注释掉,因此您可以测试代码.

#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 "nb")
# 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

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