89 lines
2.2 KiB
Plaintext
89 lines
2.2 KiB
Plaintext
|
#!/usr/bin/perl
|
||
|
|
|
||
|
|
# remove entries from the .ssh/known_hosts file for a node
|
||
|
|
|
||
|
|
use strict;
|
||
|
|
use Getopt::Long;
|
||
|
|
use Data::Dumper;
|
||
|
|
#$Data::Dumper::Maxdepth=2;
|
||
|
|
|
||
|
|
# Globals - these are set once and then only read.
|
||
|
|
my $HELP;
|
||
|
|
my $VERBOSE;
|
||
|
|
my $file = '~/.ssh/known_hosts';
|
||
|
|
|
||
|
|
my $usage = sub {
|
||
|
|
my $exitcode = shift @_;
|
||
|
|
print "Usage: khrem <node>\n";
|
||
|
|
print " Removes the entries in the .ssh/known_hosts file associated with this node.\n";
|
||
|
|
exit $exitcode;
|
||
|
|
};
|
||
|
|
|
||
|
|
# Process the cmd line args
|
||
|
|
Getopt::Long::Configure("bundling");
|
||
|
|
#Getopt::Long::Configure("pass_through");
|
||
|
|
Getopt::Long::Configure("no_pass_through");
|
||
|
|
if (!GetOptions('h|?|help' => \$HELP, 'v|verbose' => \$VERBOSE)) { $usage->(1); }
|
||
|
|
|
||
|
|
if ($HELP) { $usage->(0); }
|
||
|
|
if (scalar(@ARGV)!=1) { $usage->(1); }
|
||
|
|
my $node = $ARGV[0]; # if they specified a hostname match, only show svrs that start with that
|
||
|
|
|
||
|
|
my @output = runcmd("host $node");
|
||
|
|
my $hostname;
|
||
|
|
my $line = shift @output;
|
||
|
|
#print "line=$line\n";
|
||
|
|
if ($line =~ m/is an alias for /) {
|
||
|
|
($hostname) = $line =~ m/is an alias for ([^\.]+)/;
|
||
|
|
#print "hostname=$hostname\n";
|
||
|
|
$line = shift @output;
|
||
|
|
}
|
||
|
|
#print "line=$line\n";
|
||
|
|
my ($ip) = $line =~ m/has address (.+)$/;
|
||
|
|
if (defined($hostname)) {
|
||
|
|
print "Removing entries from $file for: $node, $hostname, $ip\n";
|
||
|
|
runcmd("sed -i '/^$node/d;/^$hostname/d;/^$ip/d' $file");
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
print "Removing entries from $file for: $node, $ip\n";
|
||
|
|
runcmd("sed -i '/^$node/d;/^$ip/d' $file");
|
||
|
|
}
|
||
|
|
|
||
|
|
exit(0);
|
||
|
|
|
||
|
|
|
||
|
|
# Pring msg only if -v was specified
|
||
|
|
sub verbose { if ($VERBOSE) { print shift, "\n"; } }
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
# Run a command. If called in the context of return an array, it will capture the output
|
||
|
|
# of the cmd and return it. Otherwise, it will display the output to stdout.
|
||
|
|
# If the cmd has a non-zero rc, this function will die with a msg.
|
||
|
|
sub runcmd
|
||
|
|
{
|
||
|
|
my ($cmd) = @_;
|
||
|
|
my $rc;
|
||
|
|
|
||
|
|
$cmd .= ' 2>&1' ;
|
||
|
|
verbose($cmd);
|
||
|
|
|
||
|
|
my @output;
|
||
|
|
if (wantarray) {
|
||
|
|
@output = `$cmd`;
|
||
|
|
$rc = $?;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
system($cmd);
|
||
|
|
$rc = $?;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($rc) {
|
||
|
|
$rc = $rc >> 8;
|
||
|
|
if ($rc > 0) { die "Error: rc $rc return from cmd: $cmd\n"; }
|
||
|
|
else { die "Error: system error returned from cmd: $cmd\n"; }
|
||
|
|
}
|
||
|
|
elsif (wantarray) { return @output; }
|
||
|
|
}
|