PAL.C.T MINI SHELL
# Functions for webmincron and classic cron jobs
# run_cron_script(path, [args])
# Given a script like spamclear.pl that would normally be run by
# cron via a wrapper, run it within the same process
sub run_cron_script
{
local ($script, $args) = @_;
local @args = split(/\s+/, $args);
local $fh = "CRONOUT";
local $temp = &transname();
open($fh, ">$temp");
my $pid = &execute_webmin_script("$module_root_directory/$script", $module_name,
\@args, $fh);
close($fh);
waitpid($pid, 0);
my $ex = $?;
print &read_file_contents($temp);
&unlink_file($temp);
}
# setup_cron_script(&cron-spec)
# Creates a Webmin Cron entry for some cron job, converting any
# existing matching regular Cron job if it exists. If the Webmin Cron
# entry already exists for the command, do nothing
sub setup_cron_script
{
local ($job) = @_;
&foreign_require("cron");
&foreign_require("webmincron");
local $cronjob = &find_module_cron_job($job->{'command'});
if ($job->{'command'} =~ /\Q$module_config_directory\E\/([^ \|\&><;]+)/) {
# Run from this module
local $script = $1;
&cron::create_wrapper($job->{'command'}, $module_name,
$script);
# Find existing classic cron job, and remove it
if ($cronjob) {
# Delete for conversion to Webmin Cron
&lock_file(&cron::cron_file($cronjob));
&cron::delete_cron_job($cronjob);
&unlock_file(&cron::cron_file($cronjob));
}
# Check if a WebminCron job exists already
my $args;
if ($job->{'command'} =~ /\Q$script\E\s+([^\|\&><;]+)/) {
# Has command-line args
$args = $1;
}
local @wcrons = &webmincron::list_webmin_crons();
local ($wjob) = grep { $_->{'module'} eq $module_name &&
$_->{'func'} eq "run_cron_script" &&
$_->{'args'}->[0] eq $script &&
$_->{'args'}->[1] eq $args } @wcrons;
# Clear fields that are only used by classic cron
delete($job->{'command'});
delete($job->{'file'});
if (!$wjob) {
# Need to create
$job->{'func'} = "run_cron_script";
$job->{'module'} = $module_name;
$job->{'args'} = [ $script ];
push(@{$job->{'args'}}, $args) if ($args);
&webmincron::save_webmin_cron($job);
}
else {
# Bring times into sync
©_cron_sched_keys($job, $wjob);
&webmincron::save_webmin_cron($wjob);
}
}
else {
# Some other random job .. just use normal cron
if (!$cronjob) {
if ($job->{'command'} =~
/\Q$config_directory\E\/([^\/]+)\/([^ \|\&><;]+)/) {
local ($m, $s) = ($1, $2);
&cron::create_wrapper($job->{'command'}, $m, $s);
}
&lock_file(&cron::cron_file($job));
&cron::create_cron_job($job);
&unlock_file(&cron::cron_file($job));
}
}
}
# delete_cron_script(script|&job)
# Deletes the classic or WebminCron job that runs some script
sub delete_cron_script
{
local ($script_or_job) = @_;
if (ref($script_or_job)) {
# Delete a specific classic or webmincron job
local $job = $script_or_job;
if ($job->{'module'}) {
&foreign_require("webmincron");
&webmincron::delete_webmin_cron($job);
}
else {
&foreign_require("cron");
&lock_file(&cron::cron_file($job));
&cron::delete_cron_job($job);
&unlock_file(&cron::cron_file($job));
}
}
else {
# Delete all matching the script
local $script = $script_or_job;
local $shortscript = $script;
$shortscript =~ s/^.*\///;
# Classic cron
&foreign_require("cron");
local @jobs = &cron::list_cron_jobs();
foreach my $job (&find_module_cron_job($script, \@jobs)) {
&lock_file(&cron::cron_file($job));
&cron::delete_cron_job($job);
&unlock_file(&cron::cron_file($job));
}
# Webmin cron
&foreign_require("webmincron");
local @wcrons = &webmincron::list_webmin_crons();
foreach my $wjob (grep { $_->{'module'} eq $module_name &&
$_->{'func'} eq "run_cron_script" &&
$_->{'args'}->[0] eq $shortscript } @wcrons) {
&webmincron::delete_webmin_cron($wjob);
}
}
}
# convert_cron_script(script)
# If a classic cron job exists that runs some script, convert to webmin cron
sub convert_cron_script
{
local ($script) = @_;
local $shortscript = $script;
$shortscript =~ s/^.*\///;
&foreign_require("cron");
&foreign_require("webmincron");
foreach my $job (&find_module_cron_job($script)) {
&lock_file(&cron::cron_file($job));
&cron::delete_cron_job($job);
&unlock_file(&cron::cron_file($job));
my $args;
if ($job->{'command'} =~ /\Q$script\E\s+([^ \|\&><;]+)/) {
# Has command-line args
$args = $1;
}
local ($wjob) = grep { $_->{'module'} eq $module_name &&
$_->{'func'} eq "run_cron_script" &&
$_->{'args'}->[0] eq $shortscript &&
$_->{'args'}->[1] eq $args }
&webmincron::list_webmin_crons();
if (!$wjob) {
$job->{'func'} = "run_cron_script";
$job->{'module'} = $module_name;
$job->{'args'} = [ $shortscript ];
push(@{$job->{'args'}}, $args) if ($args);
delete($job->{'command'});
delete($job->{'file'});
&webmincron::save_webmin_cron($job);
}
}
}
# find_cron_script(script)
# Finds the classic or Webmin cron job that runs some script
sub find_cron_script
{
local ($fullscript) = @_;
local ($script, @wantargs) = split(/\s+/, $fullscript);
local $shortscript = $script;
$shortscript =~ s/^.*\///;
# Classic cron
local @rv;
push(@rv, &find_module_cron_job($fullscript));
# Webmin cron
&foreign_require("webmincron");
foreach my $wjob (grep { $_->{'module'} eq $module_name &&
$_->{'func'} eq "run_cron_script" &&
$_->{'args'}->[0] eq $shortscript }
&webmincron::list_webmin_crons()) {
# Check rest of the args
local @a = @{$wjob->{'args'}};
shift(@a);
if (join(" ", @a) ne join(" ", @wantargs)) {
next;
}
# Fake up command
$wjob->{'command'} = $script;
if (@a) {
$wjob->{'command'} .= " ".join(" ", @a);
}
push(@rv, $wjob);
}
return wantarray ? @rv : $rv[0];
}
# copy_cron_sched_keys(&src-job, &dst-job)
# Copy all time-related keys from one cron job to another
sub copy_cron_sched_keys
{
local ($src, $dst) = @_;
foreach my $k ('mins', 'hours', 'days', 'months', 'weekdays',
'special', 'interval') {
$dst->{$k} = $src->{$k};
}
}
# find_module_cron_job(command, [&jobs], [user])
# Returns the cron job object that runs some command (perhaps with redirection)
sub find_module_cron_job
{
local ($cmd, $jobs, $user) = @_;
return undef if (!$cmd);
if (!$jobs) {
&foreign_require("cron", "cron-lib.pl");
$jobs = [ &cron::list_cron_jobs() ];
}
$user ||= "root";
local @rv = grep { $_->{'user'} eq $user &&
$_->{'command'} =~ /(^|[ \|\&;\/])\Q$cmd\E($|[ \|\&><;])/ } @$jobs;
return wantarray ? @rv : $rv[0];
}
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