我正在編寫一個腳本,用於檢查服務器中的空間並刪除舊備份/的空間小於2 GB。腳本工作正常,但因爲我使用嚴格;使用警告;在我的練習目的腳本中,這個錯誤被拋出。使用未初始化的值取消鏈接。 。 。
這裏是
#!/usr/bin/perl
use strict;
use warnings;
my @backups;
my $now=time();
my $dayago=10;
my (@space,@freesp);
@space=grep /\/dev\/md0/,`df`;
for(@space){
chomp;
@freesp=split /\s+/ ,$_;
}
chdir '/home/ftpusr/backup' or die "Can't cd to backup dir: $!\n";
while (($freesp[3]/1024/1024 < 2.0) && ($dayago > 0)){
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($now-$dayago*60*60*24);
my $today_timestamp=sprintf("%4d%02d%02d",$year+1900,$mon+1,$mday);
@backups = glob("*NODE0000.CATN0000.$today_timestamp*");
#print "@backups\n";
$dayago -= 1;
#print "$dayago\n";
unlink ($backups[0]);
}
我已經初始化$ dayago參數爲10,以便它檢查從最近10天的備份,並配備近至當前的日期,所以據我瞭解的第一次迭代的腳本while循環沒有找到特定的文件與時間空間,所以它無法鏈接,所以拋出了這個警告。有什麼方法可以消除此警告?
這裏是O/P當我運行該腳本
9
Use of uninitialized value in unlink at purge3.pl line 26.
8
Use of uninitialized value in unlink at purge3.pl line 26.
7
Use of uninitialized value in unlink at purge3.pl line 26.
6
Use of uninitialized value in unlink at purge3.pl line 26.
5
Use of uninitialized value in unlink at purge3.pl line 26.
4
Use of uninitialized value in unlink at purge3.pl line 26.
GSRTC.0.db2inst1.NODE0000.CATN0000.20130315102900.001
3
GSRTC.0.db2inst1.NODE0000.CATN0000.20130316150941.001 GSRTC.0.db2inst1.NODE0000.CATN0000.20130316171526.001
2
1
Use of uninitialized value in unlink at purge3.pl line 26.
GSRTC.0.db2inst1.NODE0000.CATN0000.20130318095532.001
0
而在目錄中的文件將被列出像,我需要刪除它們
GSRTC.0.db2inst1.NODE0000.CATN0000.20130315102900.001
GSRTC.0.db2inst1.NODE0000.CATN0000.20130316150941.001
GSRTC.0.db2inst1.NODE0000.CATN0000.20130318095532.001
AWDRT.0.db2inst1.NODE0000.CATN0000.20130319092156.001
GSRTC.0.db2inst1.NODE0000.CATN0000.20130319095258.001
不要chdir外部。使用Perl'chdir'內置函數:http://perldoc.perl.org/functions/chdir.html – 2013-03-21 05:05:03