我正在编写一个脚本,用于检查服务器中的空间并删除旧备份/的空间小于2 GB。脚本工作正常,但因为我使用严格;使用警告;在我的练习目的脚本中,这个错误被抛出。使用未初始化的值取消链接。 。 。
这里是
#!/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 ($backups[0]);
}
我已经初始化$ dayago参数为10,以便它检查从最近10天的备份,并配备近至当前的日期,所以据我了解的第一次迭代的脚本while循环没有找到特定的文件与时间空间,所以它无法链接,所以抛出了这个警告。有什么方法可以消除此警告?
这里是O/P当我运行该脚本
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
而在目录中的文件将被列出像,我需要删除它们
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'内置函数:http://perldoc.perl.org/functions/chdir.html – 2013-03-21 05:05:03