从Perl代码中抑制系统输出。
此代码在功能上运行良好,直到我遇到无法解析的主机名并希望抑制无法解析的域的输出。
如果在lists.hosts文件中存在无法解析的域,则屏幕输出将包含:" ping:无法解析XXX.com:未知主机"
my $ip;
open(HOSTLIST, "lists.hosts"); # Load domains
@hosts = <HOSTLIST>;
chomp($host);
foreach $host (@hosts) {
$results = `ping -c 1 $host`;
$record++;
my $pos = index($results, $find);
if (($results =~ /ttl=/) || ($results =~ /data bytes/)) {
#$count++;
chomp($host);
if (($results =~ /(?<=bytes from)(.*)(?=:)/) != 0) {
($ip) = ($results =~ /(?<=bytes from)(.*)(?=:)/);
}
elsif (($results =~ /(?<=\()(.*)(?=\))/) != 0) {
($ip) = ($results =~ /(?<=\()(.*)(?=\))/);
}
print "Record: $record Host: $host IP:$ip Status: Passed";
print "\n";
#print ("*** Record# $record: Ping Test Succeeded for Server: $host ***\n");
#print ("$results\n");
}
else {
$count++;
chomp($host);
#print ("*** Record# $record: Ping Test Failed for Server: $host ***\n");
print "Record: $record Host: $host Status: Failed\n";
#print ("$results\n");
}
}
close(HOSTLIST);
exit($errorcode);
答案 0 :(得分:1)
您对ping
的调用需要捕获stderr:
ping -c 1 $host 2>&1
此外,您不会检查open
的返回,您应该始终这样做。最后,您应该在顶部使用use warnings;
和use strict;
。