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@hexiyou
Created December 28, 2022 15:22
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Perl小脚本:根据主机名称关键字筛选~/.ssh/config主机配置项
#!/usr/bin/perl -W
#用途:命令行传递主机名称关键字搜索~/.ssh/config的主机配置项
#参数说明:
# $1 --- 主机名称搜索关键字
# $2 --- 要显示主机的个数限制
#Usage:
# sshfind.pl racknerd #查找主机名包含racknerd的主机
# sshfind.pl racknerd 1 #查找主机名包含racknerd的主机,仅列出一个
# sshfind.pl . 5 #查找主任意关键字主机,仅列出前5个
use strict;
my $hostName=$ARGV[0]?$ARGV[0]:""; #要搜索的SSH主机名
my $maxCount=$ARGV[1]?$ARGV[1]:0; #至多列出的主机个数,默认为0即不限制(列出所有匹配的主机)
my $showLine=0; #SSH Config行打印标记开关
my $foundCount=0; #查找到的主机个数,同一关键字可能匹配到多个主机
my $sshConfigFile="$ENV{'HOME'}/.ssh/config"; #SSH配置文件路径:(~/.ssh/config)
if(! "$hostName"){
print "缺少搜索关键字,将列出 ~/.ssh/config 全部主机!\n";
}
open(SSHCONFIG,"<$sshConfigFile") or die "$sshConfigFile 文件无法打开, $!";
while (<SSHCONFIG>) {
if(/^[\s\t]*Host[\s\t]+.*($hostName).*/i){
$showLine=1;
$foundCount+=1;
printf "\n" if $foundCount>1;
}
elsif(/^[\s\t]*Host[\s\t]+.*$/i){
$showLine=0;
}
last if $maxCount>0 and $foundCount==$maxCount+1 and $foundCount--;
print if $showLine==1;
}
print "\n找到主机 $foundCount 个\n";
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