我一直在尝试读取一个名为“perlthisfile.txt”的文件,它基本上是我计算机上 nmap 的输出。
我只想打印出 ip 地址,所以我编写了以下代码,但它不起作用:
#!/usr/bin/perl
use strict;
use warnings;
use Scalar::Util qw(looks_like_number);
print"\n running \n";
open (MYFILE, 'perlthisfile.txt') or die "Cannot open file\n";
while(<MYFILE>) {
chomp;
my @value = split(' ', <MYFILE>);
print"\n before foreach \n";
foreach my $val (@value) {
if (looks_like_number($val)) {
print "\n looks like number block \n";
if ($val == /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5})/) {
print "\n$val\n";
}
}
}
}
close(MYFILE);
exit 0;
当我运行这段代码时,输出是:
running
before foreach
before foreach
looks like number block
before foreach
looks like number block
before foreach
looks like number block
我的 perlthisfile.txt:
Starting Nmap 6.00 ( http://nmap.org ) at 2013-10-16 22:59 EST
Nmap scan report for BoB2.iiNet (10.1.1.1)
Nmap scan report for android-fbff3c3812154cdc (10.1.1.3)
All 1000 scanned ports on android-fbff3c3812154cdc (10.1.1.3) are closed
Nmap scan report for 10.1.1.5
All 1000 scanned ports on 10.1.1.5 are open|filtered
Nmap scan report for 10.1.1.6
All 1000 scanned ports on 10.1.1.6 are closed