PAL.C.T MINI SHELL
#!/usr/bin/perl
# run.cgi
# Actually run the command on all servers and show the output
require './cluster-shell-lib.pl';
&ReadParse();
&error_setup($text{'run_err'});
if ($in{'clear'}) {
# Just clearing history
&lock_file($commands_file);
unlink($commands_file);
&unlock_file($commands_file);
&webmin_log("clear");
&redirect("");
exit;
}
$in{'cmd'} ||= $in{'old'};
$in{'cmd'} =~ /\S/ || &error($text{'run_ecmd'});
# Build the list of servers
@servers = &servers::list_servers();
@sel = split(/\0/, $in{'server'});
foreach $s (@sel) {
if ($s eq "ALL") {
push(@run, grep { $_->{'user'} } @servers);
}
elsif ($s =~ /^group_(.*)$/) {
# All members of a group
($group) = grep { $_->{'name'} eq $1 }
&servers::list_all_groups(\@servers);
foreach $m (@{$group->{'members'}}) {
push(@run, grep { $_->{'host'} eq $m && $_->{'user'} }
@servers);
}
}
elsif ($s eq '*') {
# This server
push(@run, ( { 'desc' => $text{'index_this'} } ));
}
else {
# A single remote server
push(@run, grep { $_->{'host'} eq $s } @servers);
}
}
@run = grep { !$done{$_->{'id'}}++ } @run;
@run || &error($text{'run_enone'});
&ui_print_header(undef, $text{'run_title'}, "");
# Setup error handler for down hosts
sub inst_error
{
$inst_error_msg = join("", @_);
}
&remote_error_setup(\&inst_error);
# Run one each one in parallel and display the output
$p = 0;
foreach $s (@run) {
local ($rh = "READ$p", $wh = "WRITE$p");
pipe($rh, $wh);
select($wh); $| = 1; select(STDOUT);
if (!fork()) {
# Run the command in a subprocess
close($rh);
&remote_foreign_require($s->{'host'}, "webmin",
"webmin-lib.pl");
if ($inst_error_msg) {
# Failed to contact host ..
print $wh &serialise_variable([ 0, $inst_error_msg ]);
exit;
}
# Run the command and capture output
local $q = quotemeta($in{'cmd'});
local $rv = &remote_eval($s->{'host'}, "webmin",
"\$x=`($q) </dev/null 2>&1`");
print $wh &serialise_variable([ 1, $rv ]);
close($wh);
exit;
}
close($wh);
$p++;
}
# Get back all the results
$p = 0;
foreach $s (@run) {
local $rh = "READ$p";
local $line = <$rh>;
close($rh);
local $rv = &unserialise_variable($line);
local $d = $s->{'host'}.($s->{'desc'} ? " (".$s->{'desc'}.")" : "");
if (!$line) {
# Comms error with subprocess
print "<b>",&text('run_failed', $d, "Unknown reason"),
"</b><p>\n";
}
elsif (!$rv->[0]) {
# Error with remote server
print "<b>",&text('run_failed', $d, $rv->[1]),"</b><p>\n";
}
else {
# Done - show output
print "<b>",&text('run_success', $d),"</b>\n";
print "<ul><pre>".&html_escape($rv->[1])."</pre></ul><p>\n";
}
$p++;
}
# Save command and server
&open_lock_tempfile(COMMANDS, ">>$commands_file");
&print_tempfile(COMMANDS, $in{'cmd'},"\n");
&close_tempfile(COMMANDS);
$config{'server'} = join(" ", @sel);
&save_module_config();
&webmin_log("run", undef, undef, { 'cmd' => $in{'cmd'},
'run' => [ map { $_->{'host'} } @run ] });
&ui_print_footer("", $text{'index_return'});
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