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cron-lib.pl
=head1 cron-lib.pl Functions for listing, creating and managing Unix users' cron jobs. foreign_require("cron", "cron-lib.pl"); @jobs = cron::list_cron_jobs(); $job = { 'user' => 'root', 'active' => 1, 'command' => 'ls -l >/dev/null', 'special' => 'hourly' }; cron::create_cron_job($job); =cut BEGIN { push(@INC, ".."); }; use WebminCore; &init_config(); %access = &get_module_acl(); $env_support = $config{'vixie_cron'}; if ($module_info{'usermin'}) { $single_user = $remote_user; &switch_to_remote_user(); &create_user_config_dirs(); $range_cmd = "$user_module_config_directory/range.pl"; $hourly_only = 0; } else { $range_cmd = "$module_config_directory/range.pl"; $hourly_only = $access{'hourly'} == 0 ? 0 : $access{'hourly'} == 1 ? 1 : $config{'hourly_only'}; } $temp_delete_cmd = "$module_config_directory/tempdelete.pl"; $cron_temp_file = &transname(); use Time::Local; =head2 list_cron_jobs Returns a lists of structures of all cron jobs, each of which is a hash reference with the following keys : =item user - Unix user the job runs as. =item command - The full command to be run. =item active - Set to 0 if the job is commented out, 1 if active. =item mins - Minute or comma-separated list of minutes the job will run, or * for all. =item hours - Hour or comma-separated list of hours the job will run, or * for all. =item days - Day or comma-separated list of days of the month the job will run, or * for all. =item month - Month number or comma-separated list of months (started from 1) the job will run, or * for all. =item weekday - Day of the week or comma-separated list of days (where 0 is sunday) the job will run, or * for all =cut sub list_cron_jobs { local (@rv, $lnum, $f); if (scalar(@cron_jobs_cache)) { return @cron_jobs_cache; } # read the master crontab file if ($config{'system_crontab'}) { $lnum = 0; &open_readfile(TAB, $config{'system_crontab'}); while(<TAB>) { # Comment line in Fedora 13 next if (/^#+\s+\*\s+\*\s+\*\s+\*\s+\*\s+(user-name\s+)?command\s+to\s+be\s+executed/); if (/^(#+)?[\s\&]*(-)?\s*([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+(([0-9\-\*\/]+|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|,)+)\s+(([0-9\-\*\/]+|sun|mon|tue|wed|thu|fri|sat|,)+)\s+(\S+)\s+(.*)/i) { # A normal h m s d w time push(@rv, { 'file' => $config{'system_crontab'}, 'line' => $lnum, 'type' => 1, 'nolog' => $2, 'active' => !$1, 'mins' => $3, 'hours' => $4, 'days' => $5, 'months' => $6, 'weekdays' => $8, 'user' => $10, 'command' => $11, 'index' => scalar(@rv) }); if ($rv[$#rv]->{'user'} =~ /^\//) { # missing the user, as in redhat 7 ! $rv[$#rv]->{'command'} = $rv[$#rv]->{'user'}. ' '.$rv[$#rv]->{'command'}; $rv[$#rv]->{'user'} = 'root'; } &fix_names($rv[$#rv]); } elsif (/^(#+)?\s*@([a-z]+)\s+(\S+)\s+(.*)/i) { # An @ time push(@rv, { 'file' => $config{'system_crontab'}, 'line' => $lnum, 'type' => 1, 'active' => !$1, 'special' => $2, 'user' => $3, 'command' => $4, 'index' => scalar(@rv) }); } $lnum++; } close(TAB); } # read package-specific cron files opendir(DIR, &translate_filename($config{'cronfiles_dir'})); my @files = sort { $a cmp $b } readdir(DIR); closedir(DIR); foreach my $f (@files) { next if ($f =~ /^\./); $lnum = 0; &open_readfile(TAB, "$config{'cronfiles_dir'}/$f"); while(<TAB>) { if (/^(#+)?[\s\&]*(-)?\s*([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+(([0-9\-\*\/]+|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|,)+)\s+(([0-9\-\*\/]+|sun|mon|tue|wed|thu|fri|sat|,)+)\s+(\S+)\s+(.*)/i) { push(@rv, { 'file' => "$config{'cronfiles_dir'}/$f", 'line' => $lnum, 'type' => 2, 'active' => !$1, 'nolog' => $2, 'mins' => $3, 'hours' => $4, 'days' => $5, 'months' => $6, 'weekdays' => $8, 'user' => $10, 'command' => $11, 'index' => scalar(@rv) }); &fix_names($rv[$#rv]); } elsif (/^(#+)?\s*@([a-z]+)\s+(\S+)\s+(.*)/i) { push(@rv, { 'file' => "$config{'cronfiles_dir'}/$f", 'line' => $lnum, 'type' => 2, 'active' => !$1, 'special' => $2, 'user' => $3, 'command' => $4, 'index' => scalar(@rv) }); } $lnum++; } close(TAB); } # Read a single user's crontab file if ($config{'single_file'}) { &open_readfile(TAB, $config{'single_file'}); $lnum = 0; while(<TAB>) { if (/^(#+)?[\s\&]*(-)?\s*([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+(([0-9\-\*\/]+|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|,)+)\s+(([0-9\-\*\/]+|sun|mon|tue|wed|thu|fri|sat|,)+)\s+(.*)/i) { # A normal m h d m wd time push(@rv, { 'file' => $config{'single_file'}, 'line' => $lnum, 'type' => 3, 'active' => !$1, 'nolog' => $2, 'mins' => $3, 'hours' => $4, 'days' => $5, 'months' => $6, 'weekdays' => $8, 'user' => "NONE", 'command' => $10, 'index' => scalar(@rv) }); &fix_names($rv[$#rv]); } elsif (/^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*'([^']*)'/ || /^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*"([^']*)"/ || /^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*(\S+)/) { # An environment variable push(@rv, { 'file' => $config{'single_file'}, 'line' => $lnum, 'active' => !$1, 'name' => $2, 'value' => $3, 'user' => "NONE", 'command' => '', 'index' => scalar(@rv) }); } $lnum++; } close(TAB); } # read per-user cron files local $fcron = ($config{'cron_dir'} =~ /\/fcron$/); local @users; if ($single_user) { @users = ( $single_user ); } else { opendir(DIR, &translate_filename($config{'cron_dir'})); @users = grep { !/^\./ } readdir(DIR); closedir(DIR); } foreach $f (@users) { next if (!(@uinfo = getpwnam($f))); $lnum = 0; if ($single_user) { &open_execute_command(TAB, $config{'cron_user_get_command'}, 1); } elsif ($fcron) { &open_execute_command(TAB, &user_sub($config{'cron_get_command'}, $f), 1); } else { &open_readfile(TAB, "$config{'cron_dir'}/$f"); } while(<TAB>) { if (/^(#+)?[\s\&]*(-)?\s*([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+([0-9\-\*\/,]+)\s+(([0-9\-\*\/]+|jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec|,)+)\s+(([0-9\-\*\/]+|sun|mon|tue|wed|thu|fri|sat|,)+)\s+(.*)/i) { # A normal m h d m wd time push(@rv, { 'file' => "$config{'cron_dir'}/$f", 'line' => $lnum, 'type' => 0, 'active' => !$1, 'nolog' => $2, 'mins' => $3, 'hours' => $4, 'days' => $5, 'months' => $6, 'weekdays' => $8, 'user' => $f, 'command' => $10, 'index' => scalar(@rv) }); $rv[$#rv]->{'file'} =~ s/\s+\|$//; &fix_names($rv[$#rv]); } elsif (/^(#+)?\s*@([a-z]+)\s+(.*)/i) { # An @ time push(@rv, { 'file' => "$config{'cron_dir'}/$f", 'line' => $lnum, 'type' => 0, 'active' => !$1, 'special' => $2, 'user' => $f, 'command' => $3, 'index' => scalar(@rv) }); } elsif (/^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*'([^']*)'/ || /^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*"([^']*)"/ || /^(#+)?\s*([a-zA-Z0-9\_]+)\s*=\s*(\S+)/) { # An environment variable push(@rv, { 'file' => "$config{'cron_dir'}/$f", 'line' => $lnum, 'active' => !$1, 'name' => $2, 'value' => $3, 'user' => $f, 'index' => scalar(@rv) }); } $lnum++; } close(TAB); } closedir(DIR); @cron_jobs_cache = @rv; return @cron_jobs_cache; } =head2 cron_job_line(&job) Internal function to generate a crontab format line for a cron job. =cut sub cron_job_line { local @c; push(@c, "#") if (!$_[0]->{'active'}); if ($_[0]->{'name'}) { push(@c, $_[0]->{'name'}); push(@c, "="); push(@c, $_[0]->{'value'} =~ /'/ ? "\"$_[0]->{'value'}\"" : $_[0]->{'value'} =~ /"/ ? "'$_[0]->{'value'}'" : $_[0]->{'value'} !~ /^\S+$/ ? "\"$_[0]->{'value'}\"" : $_[0]->{'value'}); } else { if ($_[0]->{'special'}) { push(@c, ($_[0]->{'nolog'} ? '-' : '').'@'.$_[0]->{'special'}); } else { push(@c, ($_[0]->{'nolog'} ? '-' : '').$_[0]->{'mins'}, $_[0]->{'hours'}, $_[0]->{'days'}, $_[0]->{'months'}, $_[0]->{'weekdays'}); } push(@c, $_[0]->{'user'}) if ($_[0]->{'type'} != 0 && $_[0]->{'type'} != 3); push(@c, $_[0]->{'command'}); } if ($gconfig{'os_type'} eq 'syno-linux') { return join("\t", @c); } else { return join(" ", @c); } } =head2 copy_cron_temp(&job) Copies a job's user's current cron configuration to the temp file. For internal use only. =cut sub copy_cron_temp { local $fcron = ($config{'cron_dir'} =~ /\/fcron$/); unlink($cron_temp_file); if ($single_user) { &execute_command($config{'cron_user_get_command'}, undef, $cron_temp_file, undef); } elsif ($fcron) { &execute_command(&user_sub($config{'cron_get_command'},$_[0]->{'user'}), undef, $cron_temp_file, undef); } else { system("cp ".&translate_filename("$config{'cron_dir'}/$_[0]->{'user'}"). " ".quotemeta($cron_temp_file)." 2>/dev/null"); } } =head2 create_cron_job(&job) Add a Cron job to a user's file. The job parameter must be a hash reference in the same format as returned by list_cron_jobs. =cut sub create_cron_job { &check_cron_config_or_error(); &list_cron_jobs(); # init cache if ($config{'add_file'}) { # Add to a specific file, typically something like /etc/cron.d/webmin $_[0]->{'type'} = 1; local $lref = &read_file_lines($config{'add_file'}); push(@$lref, &cron_job_line($_[0])); &flush_file_lines($config{'add_file'}); } elsif ($config{'single_file'} && !$config{'cron_dir'}) { # Add to the single file $_[0]->{'type'} = 3; local $lref = &read_file_lines($config{'single_file'}); push(@$lref, &cron_job_line($_[0])); &flush_file_lines($config{'single_file'}); } else { # Add to the specified user's crontab ©_cron_temp($_[0]); local $lref = &read_file_lines($cron_temp_file); $_[0]->{'line'} = scalar(@$lref); push(@$lref, &cron_job_line($_[0])); &flush_file_lines($cron_temp_file); &set_ownership_permissions($_[0]->{'user'}, undef, undef, $cron_temp_file); ©_crontab($_[0]->{'user'}); $_[0]->{'file'} = "$config{'cron_dir'}/$_[0]->{'user'}"; $_[0]->{'index'} = scalar(@cron_jobs_cache); push(@cron_jobs_cache, $_[0]); } } =head2 insert_cron_job(&job) Add a Cron job at the top of the user's file. The job parameter must be a hash reference in the same format as returned by list_cron_jobs. =cut sub insert_cron_job { &check_cron_config_or_error(); &list_cron_jobs(); # init cache if ($config{'single_file'} && !$config{'cron_dir'}) { # Insert into single file $_[0]->{'type'} = 3; local $lref = &read_file_lines($config{'single_file'}); splice(@$lref, 0, 0, &cron_job_line($_[0])); &flush_file_lines($config{'single_file'}); } else { # Insert into the user's crontab ©_cron_temp($_[0]); local $lref = &read_file_lines($cron_temp_file); $_[0]->{'line'} = 0; splice(@$lref, 0, 0, &cron_job_line($_[0])); &flush_file_lines(); &set_ownership_permissions($_[0]->{'user'}, undef, undef, $cron_temp_file); ©_crontab($_[0]->{'user'}); $_[0]->{'file'} = "$config{'cron_dir'}/$_[0]->{'user'}"; $_[0]->{'index'} = scalar(@cron_jobs_cache); &renumber($_[0]->{'file'}, $_[0]->{'line'}, 1); push(@cron_jobs_cache, $_[0]); } } =head2 renumber(file, line, offset) All jobs in this file whose line is at or after the given one will be incremented by the offset. For internal use. =cut sub renumber { local $j; foreach $j (@cron_jobs_cache) { if ($j->{'line'} >= $_[1] && $j->{'file'} eq $_[0]) { $j->{'line'} += $_[2]; } } } =head2 renumber_index(index, offset) Internal function to change the index of all cron jobs in the cache after some index by a given offset. For internal use. =cut sub renumber_index { local $j; foreach $j (@cron_jobs_cache) { if ($j->{'index'} >= $_[0]) { $j->{'index'} += $_[1]; } } } =head2 change_cron_job(&job) Updates the given cron job, which must be a hash ref returned by list_cron_jobs and modified with a new active flag, command or schedule. =cut sub change_cron_job { if ($_[0]->{'type'} == 0) { ©_cron_temp($_[0]); &replace_file_line($cron_temp_file, $_[0]->{'line'}, &cron_job_line($_[0])."\n"); ©_crontab($_[0]->{'user'}); } else { &replace_file_line($_[0]->{'file'}, $_[0]->{'line'}, &cron_job_line($_[0])."\n"); } } =head2 delete_cron_job(&job) Removes the cron job defined by the given hash ref, as returned by list_cron_jobs. =cut sub delete_cron_job { if ($_[0]->{'type'} == 0) { ©_cron_temp($_[0]); &replace_file_line($cron_temp_file, $_[0]->{'line'}); ©_crontab($_[0]->{'user'}); } else { &replace_file_line($_[0]->{'file'}, $_[0]->{'line'}); } @cron_jobs_cache = grep { $_ ne $_[0] } @cron_jobs_cache; &renumber($_[0]->{'file'}, $_[0]->{'line'}, -1); &renumber_index($_[0]->{'index'}, -1); } =head2 read_crontab(user) Return an array containing the lines of the cron table for some user. For internal use mainly. =cut sub read_crontab { local(@tab); &open_readfile(TAB, "$config{cron_dir}/$_[0]"); @tab = <TAB>; close(TAB); if (@tab >= 3 && $tab[0] =~ /DO NOT EDIT/ && $tab[1] =~ /^\s*#/ && $tab[2] =~ /^\s*#/) { @tab = @tab[3..$#tab]; } return @tab; } =head2 copy_crontab(user) Copy the cron temp file to that for this user. For internal use only. =cut sub copy_crontab { if (&is_readonly_mode()) { # Do nothing return undef; } local($pwd); if (&read_file_contents($cron_temp_file) =~ /\S/) { local $temp = &transname(); local $rv; if (!&has_crontab_cmd()) { # We have no crontab command .. emulate by copying to user file $rv = system("cat ".quotemeta($cron_temp_file). " >".quotemeta("$config{'cron_dir'}/$_[0]")." 2>/dev/null"); &set_ownership_permissions($_[0], undef, 0600, "$config{'cron_dir'}/$_[0]"); } elsif ($config{'cron_edit_command'}) { # fake being an editor local $notemp = &transname(); &open_tempfile(NO, ">$notemp"); &print_tempfile(NO, "No\n"); &print_tempfile(NO, "N\n"); &print_tempfile(NO, "no\n"); &close_tempfile(NO); $ENV{"VISUAL"} = $ENV{"EDITOR"} = "$module_root_directory/cron_editor.pl"; $ENV{"CRON_EDITOR_COPY"} = $cron_temp_file; system("chown $_[0] $cron_temp_file"); local $oldpwd = &get_current_dir(); chdir("/"); if ($single_user) { $rv = system($config{'cron_user_edit_command'}. " >".quotemeta($temp)." 2>&1 <".quotemeta($notemp)); } else { $rv = system( &user_sub($config{'cron_edit_command'},$_[0]). " >".quotemeta($temp)." 2>&1 <".quotemeta($notemp)); } unlink($notemp); chdir($oldpwd); } else { # use the cron copy command if ($single_user) { $rv = &execute_command( $config{'cron_user_copy_command'}, quotemeta($cron_temp_file), quotemeta($temp), quotemeta($temp)); } else { $rv = &execute_command( &user_sub($config{'cron_copy_command'}, $_[0]), quotemeta($cron_temp_file), quotemeta($temp), quotemeta($temp)); } } local $out = &read_file_contents($temp); unlink($temp); if ($rv || $out =~ /error/i) { local $cronin = &read_file_contents($cron_temp_file); &error(&text('ecopy', "<pre>$out</pre>", "<pre>$cronin</pre>")); } } else { # No more cron jobs left, so just delete if (!&has_crontab_cmd()) { # We have no crontab command .. emulate by deleting user crontab $_[0] || &error("No user given!"); &unlink_logged("$config{'cron_dir'}/$_[0]"); } else{ if ($single_user) { &execute_command($config{'cron_user_delete_command'}); } else { &execute_command(&user_sub( $config{'cron_delete_command'}, $_[0])); } } } if (!&has_crontab_cmd()) { # to reload config &kill_byname("crond", "SIGHUP"); } unlink($cron_temp_file); } =head2 parse_job(job-line) Parse a crontab line into an array containing: active, mins, hrs, days, mons, weekdays, command =cut sub parse_job { local($job, $active) = ($_[0], 1); if ($job =~ /^#+\s*(.*)$/) { $active = 0; $job = $1; } $job =~ /^\s*(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(.*)$/; return ($active, $1, $2, $3, $4, $5, $6); } =head2 user_sub(command, user) Replace the string 'USER' in the command with the user name. For internal use only. =cut sub user_sub { local($tmp); $tmp = $_[0]; $tmp =~ s/USER/$_[1]/g; return $tmp; } =head2 list_allowed Returns a list of all Unix usernames who are allowed to use Cron. =cut sub list_allowed { local(@rv, $_); &open_readfile(ALLOW, $config{cron_allow_file}); while(<ALLOW>) { next if (/^\s*#/); chop; push(@rv, $_) if (/\S/); } close(ALLOW); return @rv; } =head2 list_denied Return a list of all Unix usernames who are not allowed to use Cron. =cut sub list_denied { local(@rv, $_); &open_readfile(DENY, $config{cron_deny_file}); while(<DENY>) { next if (/^\s*#/); chop; push(@rv, $_) if (/\S/); } close(DENY); return @rv; } =head2 save_allowed(user, user, ...) Save the list of allowed Unix usernames. =cut sub save_allowed { local($_); &open_tempfile(ALLOW, ">$config{cron_allow_file}"); foreach (@_) { &print_tempfile(ALLOW, $_,"\n"); } &close_tempfile(ALLOW); chmod(0444, $config{cron_allow_file}); } =head2 save_denied(user, user, ...) Save the list of denied Unix usernames. =cut sub save_denied { local($_); &open_tempfile(DENY, "> $config{cron_deny_file}"); foreach (@_) { &print_tempfile(DENY, $_,"\n"); } &close_tempfile(DENY); chmod(0444, $config{cron_deny_file}); } =head2 read_envs(user) Returns an array of "name value" strings containing the environment settings from the crontab for some user =cut sub read_envs { local(@tab, @rv, $_); @tab = &read_crontab($_[0]); foreach (@tab) { chop; s/#.*$//g; if (/^\s*(\S+)\s*=\s*(.*)$/) { push(@rv, "$1 $2"); } } return @rv; } =head2 save_envs(user, [name, value]*) Updates the cron file for some user with the given list of environment variables. All others in the file are removed. =cut sub save_envs { local($i, @tab, $line); @tab = &read_crontab($_[0]); open(TAB, ">".$cron_temp_file); for($i=1; $i<@_; $i+=2) { print TAB "$_[$i]=$_[$i+1]\n"; } foreach (@tab) { chop($line = $_); $line =~ s/#.*$//g; if ($line !~ /^\s*(\S+)\s*=\s*(.*)$/) { print TAB $_; } } close(TAB); ©_crontab($_[0]); } =head2 expand_run_parts(directory) Internal function to convert a directory like /etc/cron.hourly into a list of scripts in that directory. =cut sub expand_run_parts { local $dir = $_[0]; $dir = "$config{'run_parts_dir'}/$dir" if ($config{'run_parts_dir'} && $dir !~ /^\//); opendir(DIR, &translate_filename($dir)); local @rv = readdir(DIR); closedir(DIR); @rv = grep { /^[a-zA-Z0-9\_\-]+$/ } @rv; @rv = map { $dir."/".$_ } @rv; @rv = grep { -x $_ } @rv; return @rv; } =head2 is_run_parts(command) Returns the dir if some cron job runs a list of commands in some directory, like /etc/cron.hourly. Returns undef otherwise. =cut sub is_run_parts { local ($cmd) = @_; local $rp = $config{'run_parts'}; $cmd =~ s/\s*#.*$//; return $rp && $cmd =~ /$rp(.*)\s+(\-\-\S+\s+)*([a-z0-9\.\-\/_]+)(\s*\))?$/i ? $3 : undef; } =head2 can_edit_user(&access, user) Returns 1 if the Webmin user whose permissions are defined by the access hash ref can manage cron jobs for a given Unix user. =cut sub can_edit_user { local %umap; map { $umap{$_}++; } split(/\s+/, $_[0]->{'users'}) if ($_[0]->{'mode'} == 1 || $_[0]->{'mode'} == 2); if ($_[0]->{'mode'} == 1 && !$umap{$_[1]} || $_[0]->{'mode'} == 2 && $umap{$_[1]}) { return 0; } elsif ($_[0]->{'mode'} == 3) { return $remote_user eq $_[1]; } elsif ($_[0]->{'mode'} == 4) { local @u = getpwnam($_[1]); return (!$_[0]->{'uidmin'} || $u[2] >= $_[0]->{'uidmin'}) && (!$_[0]->{'uidmax'} || $u[2] <= $_[0]->{'uidmax'}); } elsif ($_[0]->{'mode'} == 5) { local @u = getpwnam($_[1]); return $u[3] == $_[0]->{'users'}; } else { return 1; } } =head2 list_cron_specials() Returns a list of the names of special cron times, prefixed by an @ in crontab =cut sub list_cron_specials { return ('hourly', 'daily', 'weekly', 'monthly', 'yearly', 'reboot'); } =head2 get_times_input(&job, [nospecial], [width-in-cols], [message]) Returns HTML for selecting the schedule for a cron job, defined by the first parameter which must be a hash ref returned by list_cron_jobs. Suitable for use inside a ui_table_start/end =cut sub get_times_input { return &theme_get_times_input(@_) if (defined(&theme_get_times_input)); my ($job, $nospecial, $width, $msg) = @_; $width ||= 2; # Javascript to disable and enable fields my $rv = <<EOF; <script> function enable_cron_fields(name, form, ena) { var els = form.elements[name]; els.disabled = !ena; for(i=0; i<els.length; i++) { els[i].disabled = !ena; } change_special_mode(form, 0); } function change_special_mode(form, special) { if(form.special_def) { form.special_def[0].checked = special; form.special_def[1].checked = !special; } } </script> EOF if ($config{'vixie_cron'} && (!$nospecial || $job->{'special'})) { # Allow selection of special @ times my $sp = $job->{'special'} eq 'midnight' ? 'daily' : $job->{'special'} eq 'annually' ? 'yearly' : $job->{'special'}; my $specialsel = &ui_select("special", $sp, [ map { [ $_, $text{'edit_special_'.$_} ] } &list_cron_specials() ], 1, 0, 0, 0, "onChange='change_special_mode(form, 1)'"); $rv .= &ui_table_row($msg, &ui_radio("special_def", $job->{'special'} ? 1 : 0, [ [ 1, $text{'edit_special1'}." ".$specialsel ], [ 0, $text{'edit_special0'} ] ]), $msg ? $width-1 : $width); } # Section for time selections my $table = &ui_columns_start([ $text{'edit_mins'}, $text{'edit_hours'}, $text{'edit_days'}, $text{'edit_months'}, $text{'edit_weekdays'} ], 100); my @mins = (0..59); my @hours = (0..23); my @days = (1..31); my @months = map { $text{"month_$_"}."=".$_ } (1 .. 12); my @weekdays = map { $text{"day_$_"}."=".$_ } (0 .. 6); my %arrmap = ( 'mins' => \@mins, 'hours' => \@hours, 'days' => \@days, 'months' => \@months, 'weekdays' => \@weekdays ); my @cols; foreach my $arr ("mins", "hours", "days", "months", "weekdays") { # Find out which ones are being used my %inuse; my $min = ($arr =~ /days|months/ ? 1 : 0); my @arrlist = @{$arrmap{$arr}}; my $max = $min+scalar(@arrlist)-1; foreach my $w (split(/,/ , $job->{$arr})) { if ($w eq "*") { # all values for($j=$min; $j<=$max; $j++) { $inuse{$j}++; } } elsif ($w =~ /^\*\/(\d+)$/) { # only every Nth for($j=$min; $j<=$max; $j+=$1) { $inuse{$j}++; } } elsif ($w =~ /^(\d+)-(\d+)\/(\d+)$/) { # only every Nth of some range for($j=$1; $j<=$2; $j+=$3) { $inuse{int($j)}++; } } elsif ($w =~ /^(\d+)-(\d+)$/) { # all of some range for($j=$1; $j<=$2; $j++) { $inuse{int($j)}++; } } else { # One value $inuse{int($w)}++; } } if ($job->{$arr} eq "*") { %inuse = ( ); } # Output selection list my $dis = $arr eq "mins" && $hourly_only; my $col = &ui_radio( "all_$arr", $job->{$arr} eq "*" || $job->{$arr} eq "" ? 1 : 0, [ [ 1, $text{'edit_all'}."<br>", "onClick='enable_cron_fields(\"$arr\", form, 0)'" ], [ 0, $text{'edit_selected'}."<br>", "onClick='enable_cron_fields(\"$arr\", form, 1)'" ] ], $dis); $col .= "<table> <tr>\n"; for(my $j=0; $j<@arrlist; $j+=($arr eq "mins" && $hourly_only ? 60 : 12)) { my $jj = $j+($arr eq "mins" && $hourly_only ? 59 : 11); if ($jj >= @arrlist) { $jj = @arrlist - 1; } my @sec = @arrlist[$j .. $jj]; my @opts; foreach my $v (@sec) { if ($v =~ /^(.*)=(.*)$/) { push(@opts, [ $2, $1 ]); } else { push(@opts, [ $v, $v ]); } } my $dis = $job->{$arr} eq "*" || $job->{$arr} eq ""; $col .= "<td valign=top>". &ui_select($arr, [ keys %inuse ], \@opts, @sec > 12 ? ($arr eq "mins" && $hourly_only ? 1 : 12) : scalar(@sec), $arr eq "mins" && $hourly_only ? 0 : 1, 0, $dis). "</td>\n"; } $col .= "</tr></table>\n"; push(@cols, $col); } $table .= &ui_columns_row(\@cols, [ "valign=top", "valign=top", "valign=top", "valign=top", "valign=top" ]); $table .= &ui_columns_end(); $table .= $text{'edit_ctrl'}; $rv .= &ui_table_row(undef, $table, $width, undef, ['data-schedule-tr']); return $rv; } =head2 show_times_input(&job, [nospecial]) Print HTML for inputs for selecting the schedule for a cron job, defined by the first parameter which must be a hash ref returned by list_cron_jobs. This must be used inside a <table>, as the HTML starts and ends with <tr> tags. =cut sub show_times_input { return &theme_show_times_input(@_) if (defined(&theme_show_times_input)); local $job = $_[0]; if ($config{'vixie_cron'} && (!$_[1] || $_[0]->{'special'})) { # Allow selection of special @ times print "<tr data-schedule-tr $cb> <td colspan=6>\n"; printf "<input type=radio name=special_def value=1 %s> %s\n", $job->{'special'} ? "checked" : "", $text{'edit_special1'}; print "<select name=special onChange='change_special_mode(form, 1)'>\n"; local $s; local $sp = $job->{'special'} eq 'midnight' ? 'daily' : $job->{'special'} eq 'annually' ? 'yearly' : $job->{'special'}; foreach $s ('hourly', 'daily', 'weekly', 'monthly', 'yearly', 'reboot'){ printf "<option value=%s %s>%s</option>\n", $s, $sp eq $s ? "selected" : "", $text{'edit_special_'.$s}; } print "</select>\n"; printf "<input type=radio name=special_def value=0 %s> %s\n", $job->{'special'} ? "" : "checked", $text{'edit_special0'}; print "</td></tr>\n"; } # Javascript to disable and enable fields print <<EOF; <script> function enable_cron_fields(name, form, ena) { var els = form.elements[name]; els.disabled = !ena; for(i=0; i<els.length; i++) { els[i].disabled = !ena; } change_special_mode(form, 0); } function change_special_mode(form, special) { if(form.special_def) { form.special_def[0].checked = special; form.special_def[1].checked = !special; } } </script> EOF print "<tr $tb>\n"; print "<td><b>$text{'edit_mins'}</b></td> <td><b>$text{'edit_hours'}</b></td> ", "<td><b>$text{'edit_days'}</b></td> <td><b>$text{'edit_months'}</b></td>", "<td><b>$text{'edit_weekdays'}</b></td> </tr> <tr $cb>\n"; local @mins = (0..59); local @hours = (0..23); local @days = (1..31); local @months = map { $text{"month_$_"}."=".$_ } (1 .. 12); local @weekdays = map { $text{"day_$_"}."=".$_ } (0 .. 6); foreach $arr ("mins", "hours", "days", "months", "weekdays") { # Find out which ones are being used local %inuse; local $min = ($arr =~ /days|months/ ? 1 : 0); local $max = $min+scalar(@$arr)-1; foreach $w (split(/,/ , $job->{$arr})) { if ($w eq "*") { # all values for($j=$min; $j<=$max; $j++) { $inuse{$j}++; } } elsif ($w =~ /^\*\/(\d+)$/) { # only every Nth for($j=$min; $j<=$max; $j+=$1) { $inuse{$j}++; } } elsif ($w =~ /^(\d+)-(\d+)\/(\d+)$/) { # only every Nth of some range for($j=$1; $j<=$2; $j+=$3) { $inuse{int($j)}++; } } elsif ($w =~ /^(\d+)-(\d+)$/) { # all of some range for($j=$1; $j<=$2; $j++) { $inuse{int($j)}++; } } else { # One value $inuse{int($w)}++; } } if ($job->{$arr} eq "*") { undef(%inuse); } # Output selection list print "<td valign=top>\n"; printf "<input type=radio name=all_$arr value=1 %s %s %s> %s<br>\n", $arr eq "mins" && $hourly_only ? "disabled" : "", $job->{$arr} eq "*" || $job->{$arr} eq "" ? "checked" : "", "onClick='enable_cron_fields(\"$arr\", form, 0)'", $text{'edit_all'}; printf "<input type=radio name=all_$arr value=0 %s %s> %s<br>\n", $job->{$arr} eq "*" || $job->{$arr} eq "" ? "" : "checked", "onClick='enable_cron_fields(\"$arr\", form, 1)'", $text{'edit_selected'}; print "<table> <tr>\n"; for($j=0; $j<@$arr; $j+=($arr eq "mins" && $hourly_only ? 60 : 12)) { $jj = $j+($arr eq "mins" && $hourly_only ? 59 : 11); if ($jj >= @$arr) { $jj = @$arr - 1; } @sec = @$arr[$j .. $jj]; printf "<td valign=top><select %s size=%d name=$arr %s %s>\n", $arr eq "mins" && $hourly_only ? "" : "multiple", @sec > 12 ? ($arr eq "mins" && $hourly_only ? 1 : 12) : scalar(@sec), $job->{$arr} eq "*" || $job->{$arr} eq "" ? "disabled" : "", "onChange='change_special_mode(form, 0)'"; foreach $v (@sec) { if ($v =~ /^(.*)=(.*)$/) { $disp = $1; $code = $2; } else { $disp = $code = $v; } printf "<option value=\"$code\" %s>$disp</option>\n", $inuse{$code} ? "selected" : ""; } print "</select></td>\n"; } print "</tr></table></td>\n"; } print "</tr> <tr $cb> <td colspan=5>$text{'edit_ctrl'}</td> </tr>\n"; } =head2 parse_times_input(&job, &in) Parses inputs from the form generated by show_times_input, and updates a cron job hash ref. The in parameter must be a hash ref as generated by the ReadParse function. =cut sub parse_times_input { local $job = $_[0]; local %in = %{$_[1]}; local @pers = ("mins", "hours", "days", "months", "weekdays"); local $arr; if ($in{'special_def'}) { # Job time is a special period foreach $arr (@pers) { delete($job->{$arr}); } $job->{'special'} = $in{'special'}; } else { # User selection of times foreach $arr (@pers) { if ($in{"all_$arr"}) { # All mins/hrs/etc.. chosen $job->{$arr} = "*"; } elsif (defined($in{$arr})) { # Need to work out and simplify ranges selected local (@range, @newrange, $i); @range = split(/\0/, $in{$arr}); @range = sort { $a <=> $b } @range; local $start = -1; for($i=0; $i<@range; $i++) { if ($i && $range[$i]-1 == $range[$i-1]) { # ok.. looks like a range if ($start < 0) { $start = $i-1; } } elsif ($start < 0) { # Not in a range at all push(@newrange, $range[$i]); } else { # End of the range.. add it $newrange[@newrange - 1] = "$range[$start]-".$range[$i-1]; push(@newrange, $range[$i]); $start = -1; } } if ($start >= 0) { # Reached the end while in a range $newrange[@newrange - 1] = "$range[$start]-".$range[$i-1]; } $job->{$arr} = join(',' , @newrange); } else { &error(&text('save_enone', $text{"edit_$arr"})); } } delete($job->{'special'}); } } =head2 show_range_input(&job) Given a cron job, prints fields for selecting it's run date range. =cut sub show_range_input { local ($job) = @_; local $has_start = $job->{'start'}; local $rng; $rng = &text('range_start', &ui_date_input( $job->{'start'}->[0], $job->{'start'}->[1], $job->{'start'}->[2], "range_start_day", "range_start_month", "range_start_year"))."\n". &date_chooser_button( "range_start_day", "range_start_month", "range_start_year")."\n". &text('range_end', &ui_date_input( $job->{'end'}->[0], $job->{'end'}->[1], $job->{'end'}->[2], "range_end_day", "range_end_month", "range_end_year"))."\n". &date_chooser_button( "range_end_day", "range_end_month", "range_end_year")."\n"; print &ui_oneradio("range_def", 1, $text{'range_all'}, !$has_start), "<br>\n"; print &ui_oneradio("range_def", 0, $rng, $has_start),"\n"; } =head2 parse_range_input(&job, &in) Updates the job object with the specified date range. May call &error for invalid inputs. =cut sub parse_range_input { local ($job, $in) = @_; if ($in->{'range_def'}) { # No range used delete($job->{'start'}); delete($job->{'end'}); } else { # Validate and store range foreach my $r ("start", "end") { eval { timelocal(0, 0, 0, $in->{'range_'.$r.'_day'}, $in->{'range_'.$r.'_month'}-1, $in->{'range_'.$r.'_year'}-1900) }; if ($@) { &error($text{'range_e'.$r}." ".$@); } $job->{$r} = [ $in->{'range_'.$r.'_day'}, $in->{'range_'.$r.'_month'}, $in->{'range_'.$r.'_year'} ]; } } } @cron_month = ( 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec' ); @cron_weekday = ( 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat' ); =head2 fix_names(&cron) Convert day and month names to numbers. For internal use when parsing the crontab file. =cut sub fix_names { local ($m, $w); local @mts = split(/,/, $_[0]->{'months'}); foreach $m (@mts) { local $mi = &indexof(lc($m), @cron_month); $m = $mi+1 if ($mi >= 0); } $_[0]->{'months'} = join(",", @mts); local @wds = split(/,/, $_[0]->{'weekdays'}); foreach $w (@wds) { local $di = &indexof(lc($w), @cron_weekday); $w = $di if ($di >= 0); $w = 0 if ($w == 7); } $_[0]->{'weekdays'} = join(",", @wds); } =head2 cron_file(&job) Returns the file that a cron job is in, or will be in when it is created based on the username. =cut sub cron_file { return $_[0]->{'file'} || $config{'add_file'} || "$config{'cron_dir'}/$_[0]->{'user'}"; } =head2 when_text(&job, [upper-case-first]) Returns a human-readable text string describing when a cron job is run. =cut sub when_text { my ($job, $ucfirst) = @_; my $pfx = $ucfirst ? "uc" : ""; if ($job->{'interval'}) { return &text($pfx.'when_interval', $job->{'interval'}); } elsif ($job->{'special'}) { $pfx = $_[1] ? "" : "lc"; return $text{$pfx.'edit_special_'.$job->{'special'}}; } elsif ($job->{'boot'}) { return &text($pfx.'when_boot'); } elsif ($job->{'mins'} eq '*' && $job->{'hours'} eq '*' && $job->{'days'} eq '*' && $job->{'months'} eq '*' && $job->{'weekdays'} eq '*') { return $text{$pfx.'when_min'}; } elsif ($job->{'mins'} =~ /^\d+$/ && $job->{'hours'} eq '*' && $job->{'days'} eq '*' && $job->{'months'} eq '*' && $job->{'weekdays'} eq '*') { return &text($pfx.'when_hour', $job->{'mins'}); } elsif ($job->{'mins'} =~ /^\d+$/ && $job->{'hours'} =~ /^\d+$/ && $job->{'days'} eq '*' && $job->{'months'} eq '*' && $job->{'weekdays'} eq '*') { return &text($pfx.'when_day', sprintf("%2.2d", $job->{'mins'}), sprintf("%2.2d", $job->{'hours'})); } elsif ($job->{'mins'} =~ /^\d+$/ && $job->{'hours'} =~ /^\d+$/ && $job->{'days'} =~ /^\d+$/ && $job->{'months'} eq '*' && $job->{'weekdays'} eq '*') { return &text($pfx.'when_month', sprintf("%2.2d", $job->{'mins'}), sprintf("%2.2d", $job->{'hours'}), $job->{'days'}); } elsif ($job->{'mins'} =~ /^\d+$/ && $job->{'hours'} =~ /^\d+$/ && $job->{'days'} eq '*' && $job->{'months'} eq '*' && $job->{'weekdays'} =~ /^\d+$/) { return &text($pfx.'when_weekday', sprintf("%2.2d", $job->{'mins'}), sprintf("%2.2d", $job->{'hours'}), $text{"day_".$job->{'weekdays'}}); } else { return &text($pfx.'when_cron', join(" ", $job->{'mins'}, $job->{'hours'}, $job->{'days'}, $job->{'months'}, $job->{'weekdays'})); } } =head2 can_use_cron(user) Returns 1 if some user is allowed to use cron, based on cron.allow and cron.deny files. =cut sub can_use_cron { local ($user) = @_; defined(getpwnam($user)) || return 0; # User does not exist local $err; if (-r $config{cron_allow_file}) { local @allowed = &list_allowed(); if (&indexof($user, @allowed) < 0 && &indexof("all", @allowed) < 0) { $err = 1; } } elsif (-r $config{cron_deny_file}) { local @denied = &list_denied(); if (&indexof($user, @denied) >= 0 || &indexof("all", @denied) >= 0) { $err = 1; } } elsif ($config{cron_deny_all} == 0) { $err = 1; } elsif ($config{cron_deny_all} == 1) { if ($in{user} ne "root") { $err = 1; } } return !$err; } =head2 swap_cron_jobs(&job1, &job2) Swaps two Cron jobs, which must be in the same file, identified by their hash references as returned by list_cron_jobs. =cut sub swap_cron_jobs { if ($_[0]->{'type'} == 0) { ©_cron_temp($_[0]); local $lref = &read_file_lines($cron_temp_file); ($lref->[$_[0]->{'line'}], $lref->[$_[1]->{'line'}]) = ($lref->[$_[1]->{'line'}], $lref->[$_[0]->{'line'}]); &flush_file_lines(); ©_crontab($_[0]->{'user'}); } else { local $lref = &read_file_lines($_[0]->{'file'}); ($lref->[$_[0]->{'line'}], $lref->[$_[1]->{'line'}]) = ($lref->[$_[1]->{'line'}], $lref->[$_[0]->{'line'}]); &flush_file_lines(); } } =head2 find_cron_process(&job, [&procs]) Finds the running process that was launched from a cron job. The parameters are: =item job - A cron job hash reference =item procs - An optional array reference of running process hash refs =cut sub find_cron_process { local @procs; if ($_[1]) { @procs = @{$_[1]}; } else { &foreign_require("proc", "proc-lib.pl"); @procs = &proc::list_processes(); } local $rpd = &is_run_parts($_[0]->{'command'}); local @exp = $rpd ? &expand_run_parts($rpd) : (); local $cmd = $exp[0] || $_[0]->{'command'}; $cmd =~ s/^\s*\[.*\]\s+\&\&\s+//; $cmd =~ s/^\s*\[.*\]\s+\|\|\s+//; while($cmd =~ s/(\d*)(<|>)((\/\S+)|&\d+)\s*$//) { } $cmd =~ s/^\((.*)\)\s*$/$1/; $cmd =~ s/\s+$//; my $eos; if ($config{'match_mode'} == 1) { $cmd =~ s/\s.*$//; $eos = '$'; } else { my $cmd_ = $cmd; $cmd_ =~ s/\s.*$//; if ($cmd_ eq $cmd) { $eos = '$'; } } # If `Input to command` is set, remove it for test case # otherwise cmd will always be displayed as not running my $cmd_ = $cmd; # First remove only input to command and preserve # potential arguments containing escaped %, like \\% $cmd_ =~ s/(?<!\\)%.*//; # Now replace escaped \\ special chars for testing purposes $cmd_ =~ s/\\//g; ($proc) = grep { $_->{'args'} =~ /\Q$cmd_\E$eos/ && (!$config{'match_user'} || $_->{'user'} eq $_[0]->{'user'}) } @procs; if (!$proc && $cmd =~ /^$config_directory\/(.*\.pl)(.*)$/) { # Must be a Webmin wrapper $cmd = "$root_directory/$1$2"; ($proc) = grep { $_->{'args'} =~ /\Q$cmd\E/ && (!$config{'match_user'} || $_->{'user'} eq $_[0]->{'user'}) } @procs; } return $proc; } =head2 find_cron_job(command, [&jobs], [user]) Returns the cron job object that runs some command (perhaps with redirection) =cut sub find_cron_job { my ($cmd, $jobs, $user) = @_; if (!$jobs) { $jobs = [ &list_cron_jobs() ]; } $user ||= "root"; my @rv = grep { $_->{'user'} eq $user && $_->{'command'} =~ /(^|[ \|\&;\/])\Q$cmd\E($|[ \|\&><;])/ } @$jobs; return wantarray ? @rv : $rv[0]; } =head2 extract_input(command) Given a line formatted like I<command%input>, returns the command and input parts, taking any escaping into account. =cut sub extract_input { local ($cmd) = @_; $cmd =~ s/\\%/\0/g; local ($cmd, $input) = split(/\%/, $cmd, 2); $cmd =~ s/\0/\\%/g; $input =~ s/\0/\\%/g; return ($cmd, $input); } =head2 convert_range(&job) Given a cron job that uses range.pl, work out the date range and update the job object command. Mainly for internal use. =cut sub convert_range { local ($job) = @_; local ($cmd, $input) = &extract_input($job->{'command'}); if ($cmd =~ /^\Q$range_cmd\E\s+(\d+)\-(\d+)\-(\d+)\s+(\d+)\-(\d+)\-(\d+)\s+(.*)$/) { # Looks like a range command $job->{'start'} = [ $1, $2, $3 ]; $job->{'end'} = [ $4, $5, $6 ]; $job->{'command'} = $7; $job->{'command'} =~ s/\\(.)/$1/g; if ($input) { $job->{'command'} .= '%'.$input; } return 1; } return 0; } =head2 unconvert_range(&job) Give a cron job with start and end fields, updates the command to wrap it in range.pl with those dates as parameters. =cut sub unconvert_range { local ($job) = @_; if ($job->{'start'}) { # Need to add range command local ($cmd, $input) = &extract_input($job->{'command'}); $job->{'command'} = $range_cmd." ".join("-", @{$job->{'start'}})." ". join("-", @{$job->{'end'}})." ". quotemeta($cmd); if ($input) { $job->{'command'} .= '%'.$input; } delete($job->{'start'}); delete($job->{'end'}); ©_source_dest("$module_root_directory/range.pl", $range_cmd); &set_ownership_permissions(undef, undef, 0755, $range_cmd); return 1; } return 0; } =head2 convert_comment(&job) Given a cron job with a # comment after the command, sets the comment field =cut sub convert_comment { local ($job) = @_; if ($job->{'command'} =~ /^(.*\S)\s*#([^#]*)$/) { $job->{'command'} = $1; $job->{'comment'} = $2; return 1; } return 0; } =head2 unconvert_comment(&job) Adds an comment back to the command in a cron job, based on the comment field of the given hash reference. =cut sub unconvert_comment { local ($job) = @_; if ($job->{'comment'} =~ /\S/) { $job->{'command'} .= " #".$job->{'comment'}; return 1; } return 0; } =head2 check_cron_config Returns an error message if the cron config doesn't look valid, or some needed command is missing. =cut sub check_cron_config { # Check for single file and getter command if ($config{'single_file'} && !-r $config{'single_file'}) { return &text('index_esingle', "<tt>$config{'single_file'}</tt>"); } if (!&has_crontab_cmd() && $config{'cron_get_command'} =~ /^(\S+)/ && !&has_command("$1")) { return &text('index_ecmd', "<tt>$1</tt>"); } # Check for directory local $fcron = ($config{'cron_dir'} =~ /\/fcron$/); if (!$single_user && !$config{'single_file'} && !$fcron && !-d $config{'cron_dir'}) { if (!$in{'create_dir'}) { return &text('index_ecrondir', "<tt>$config{'cron_dir'}</tt>"). "<p><a href=\"index.cgi?create_dir=yes\">".&text('index_ecrondir_create' ,"<tt>$config{'cron_dir'}</tt>")."</a></p>"; } else { &make_dir($config{'cron_dir'}, 0755); } } return undef; } =head2 check_cron_config_or_error Calls check_cron_config, and then error if any problems were detected. =cut sub check_cron_config_or_error { local $err = &check_cron_config(); if ($err) { &error(&text('index_econfigcheck', $err)); } } =head2 cleanup_temp_files Called from cron to delete old files in the Webmin /tmp directory, and also old lock links directories. =cut sub cleanup_temp_files { # Don't run if disabled if (!$gconfig{'tempdelete_days'}) { print STDERR "Temp file clearing is disabled\n"; return; } # Cleanup files in /tmp/.webmin if ($gconfig{'tempdir'} && !$gconfig{'tempdirdelete'}) { print STDERR "Temp file clearing is not done for the custom directory $gconfig{'tempdir'}\n"; } else { my $tempdir = &transname(); $tempdir =~ s/\/([^\/]+)$//; if (!$tempdir || $tempdir eq "/") { $tempdir = "/tmp/.webmin"; } my $cutoff = time() - $gconfig{'tempdelete_days'}*24*60*60; if (opendir(DIR, $tempdir)) { foreach my $f (readdir(DIR)) { next if ($f eq "." || $f eq ".."); my @st = lstat("$tempdir/$f"); if ($st[9] < $cutoff) { &unlink_file("$tempdir/$f"); } } closedir(DIR); } } # Delete stale lock files my $lockdir = $var_directory."/locks"; if (opendir(DIR, $lockdir)) { foreach my $f (readdir(DIR)) { next if ($f eq "." || $f eq ".."); next if ($f !~ /^\d+$/); if (!kill(0, $f)) { # Process is gone, but never cleaned up! &unlink_file("$lockdir/$f"); } } closedir(DIR); } # Cleanup old websockets foreach (&get_miniserv_websockets_modules()) { &cleanup_miniserv_websockets(undef, $_); } # Delete forgot-password files older than 1 day if (opendir(DIR, $main::forgot_password_link_dir)) { my $cutoff = time() - 24*60*60; foreach my $f (readdir(DIR)) { next if ($f eq "." || $f eq ".."); next if ($f eq "ratelimit"); my $path = $main::forgot_password_link_dir."/".$f; my @st = stat($path); if ($st[9] < $cutoff) { &unlink_file($path); } } closedir(DIR); } } =head2 list_cron_files() Returns a list of all files containing cron jobs =cut sub list_cron_files { my @jobs = &list_cron_jobs(); my @files = map { $_->{'file'} } grep { $_->{'file'} } @jobs; if ($config{'system_crontab'}) { push(@files, $config{'system_crontab'}); } if ($config{'cronfiles_dir'}) { push(@files, glob(&translate_filename($config{'cronfiles_dir'})."/*")); @files = grep { -f $_ } @files; } return &unique(@files); } =head2 has_crontab_cmd() Returns 1 if the crontab command exists on this system =cut sub has_crontab_cmd { my $cmd = $config{'cron_edit_command'}; if ($cmd) { $cmd =~ s/^su.*-c\s+//; ($cmd) = &split_quoted_string($cmd); my $rv = &has_command($cmd); return $rv if ($rv); } return &has_command("crontab"); } =head2 next_run(&job) Given a cron job, returns the unix time on which it will run next. =cut sub next_run { my ($job) = @_; my $now = time(); my @tm = localtime($now); if ($job->{'special'} eq 'hourly') { $job = { 'mins' => 0, 'hours' => '*', 'days' => '*', 'months' => '*', 'weekdays' => '*' }; } elsif ($job->{'special'} eq 'daily') { $job = { 'mins' => 0, 'hours' => 0, 'days' => '*', 'months' => '*', 'weekdays' => '*' }; } elsif ($job->{'special'} eq 'weekly') { $job = { 'mins' => 0, 'hours' => 0, 'days' => '*', 'months' => '*', 'weekdays' => 0 }; } elsif ($job->{'special'} eq 'monthly') { $job = { 'mins' => 0, 'hours' => 0, 'days' => '1', 'months' => '*', 'weekdays' => '*' }; } elsif ($job->{'special'} eq 'yearly') { $job = { 'mins' => 0, 'hours' => 0, 'days' => 1, 'months' => 1, 'weekdays' => '*' }; } elsif ($job->{'special'} eq 'reboot') { return undef; } my @mins = &cron_all_ranges($job->{'mins'}, 0, 59); my @hours = &cron_all_ranges($job->{'hours'}, 0, 23); my @days = &cron_all_ranges($job->{'days'}, 1, 31); my @months = &cron_all_ranges($job->{'months'}, 1, 12); my @weekdays = &cron_all_ranges($job->{'weekdays'}, 0, 6); my ($min, $hour, $day, $month, $year); my @possible; foreach $min (@mins) { foreach $hour (@hours) { foreach $day (@days) { foreach $month (@months) { foreach $year ($tm[5] .. $tm[5]+7) { my $tt; eval { $tt = timelocal(0, $min, $hour, $day, $month-1, $year) }; next if ($tt < $now); my @ttm = localtime($tt); next if (&indexof($ttm[6], @weekdays) < 0); push(@possible, $tt); last; } } } } } @possible = sort { $a <=> $b } @possible; return $possible[0]; } =head2 cron_range(range, min, max) =cut sub cron_range { my ($w, $min, $max) = @_; my $j; my %inuse; if ($w eq "*") { # all values for($j=$min; $j<=$max; $j++) { $inuse{$j}++; } } elsif ($w =~ /^\*\/(\d+)$/) { # only every Nth my $step = $1 || 1; for($j=$min; $j<=$max; $j+=$step) { $inuse{$j}++; } } elsif ($w =~ /^(\d+)-(\d+)\/(\d+)$/) { # only every Nth of some range my $step = $3 || 1; for($j=$1; $j<=$2; $j+=$step) { $inuse{int($j)}++; } } elsif ($w =~ /^(\d+)-(\d+)$/) { # all of some range for($j=$1; $j<=$2; $j++) { $inuse{int($j)}++; } } else { # One value $inuse{int($w)}++; } return sort { $a <=> $b } (keys %inuse); } =head2 cron_all_ranges(comma-list, min, max) =cut sub cron_all_ranges { my @rv; foreach $r (split(/,/, $_[0])) { push(@rv, &cron_range($r, $_[1], $_[2])); } return sort { $a <=> $b } @rv; } 1;