package DXCron;
+use DXVars;
use DXUtil;
use DXM;
use DXDebug;
+use FileHandle;
use Carp;
use strict;
+use vars qw{@crontab $mtime $lasttime $lastmin};
+
+@crontab = ();
+$mtime = 1;
+$lasttime = 0;
+$lastmin = 0;
+
+
+my $fn = "$main::cmd/crontab";
+my $localfn = "$main::localcmd/crontab";
+
# cron initialisation / reading in cronjobs
sub init
{
+ if ((-e $localfn && -M $localfn < $mtime) || (-e $fn && -M $fn < $mtime) || $mtime == 0) {
+ my $t;
+
+ @crontab = ();
+
+ # first read in the standard one
+ if (-e $fn) {
+ $t = -M $fn;
+
+ cread($fn);
+ $mtime = $t if $t <= $mtime;
+ }
+
+ # then read in any local ones
+ if (-e $localfn) {
+ $t = -M $localfn;
+
+ cread($localfn);
+ $mtime = $t if $t <= $mtime;
+ }
+ }
+}
+
+# read in a cron file
+sub cread
+{
+ my $fn = shift;
+ my $fh = new FileHandle;
+ my $line = 0;
+ dbg('cron', "cron: reading $fn\n");
+ open($fh, $fn) or confess("cron: can't open $fn $!");
+ while (<$fh>) {
+ $line++;
+ chomp;
+ next if /^\s*#/o or /^\s*$/o;
+ my ($min, $hour, $mday, $month, $wday, $cmd) = /^\s*(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(.+)$/o;
+ next if !$min;
+ my $ref = bless {};
+ my $err;
+
+ $err |= parse($ref, 'min', $min, 0, 60);
+ $err |= parse($ref, 'hour', $hour, 0, 23);
+ $err |= parse($ref, 'mday', $mday, 1, 31);
+ $err |= parse($ref, 'month', $month, 1, 12, "jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec");
+ $err |= parse($ref, 'wday', $wday, 0, 6, "sun", "mon", "tue", "wed", "thu", "fri", "sat");
+ if (!$err) {
+ $ref->{cmd} = $cmd;
+ push @crontab, $ref;
+ dbg('cron', "cron: adding $_\n");
+ } else {
+ dbg('cron', "cron: error on line $line '$_'\n");
+ }
+ }
+ close($fh);
+}
+
+sub parse
+{
+ my $ref = shift;
+ my $sort = shift;
+ my $val = shift;
+ my $low = shift;
+ my $high = shift;
+ my @req;
+
+ # handle '*' values
+ if ($val eq '*') {
+ $ref->{$sort} = 0;
+ return 0;
+ }
+
+ # handle comma delimited values
+ my @comma = split /,/o, $val;
+ for (@comma) {
+ my @minus = split /-/o;
+ if (@minus == 2) {
+ return 1 if $minus[0] < $low || $minus[0] > $high;
+ return 1 if $minus[1] < $low || $minus[1] > $high;
+ my $i;
+ for ($i = $minus[0]; $i <= $minus[1]; ++$i) {
+ push @req, 0 + $i;
+ }
+ } else {
+ return 1 if $_ < $low || $_ > $high;
+ push @req, 0 + $_;
+ }
+ }
+ $ref->{$sort} = \@req;
+
+ return 0;
}
# process the cronjobs
sub process
{
+ my $now = $main::systime;
+ return if $now-$lasttime < 1;
+
+ my ($sec, $min, $hour, $mday, $mon, $wday) = (gmtime($now))[0,1,2,3,4,6];
+
+ # are we at a minute boundary?
+ if ($min != $lastmin) {
+
+ # read in any changes if the modification time has changed
+ init();
+
+ $mon += 1; # months otherwise go 0-11
+ my $cron;
+ foreach $cron (@crontab) {
+ if ((!$cron->{min} || grep $_ eq $min, @{$cron->{min}}) &&
+ (!$cron->{hour} || grep $_ eq $hour, @{$cron->{hour}}) &&
+ (!$cron->{mday} || grep $_ eq $mday, @{$cron->{mday}}) &&
+ (!$cron->{mon} || grep $_ eq $mon, @{$cron->{mon}}) &&
+ (!$cron->{wday} || grep $_ eq $wday, @{$cron->{wday}}) ){
+
+ if ($cron->{cmd}) {
+ dbg('cron', "cron: $min $hour $mday $mon $wday -> doing '$cron->{cmd}'");
+ eval "$cron->{cmd}";
+ dbg('cron', "cron: cmd error $@") if $@;
+ }
+ }
+ }
+ }
+
+ # remember when we are now
+ $lasttime = $now;
+ $lastmin = $min;
+}
+
+#
+# these are simple stub functions to make connecting easy in DXCron contexts
+#
+
+sub connected
+{
+ my $call = uc shift;
+ return DXChannel->get($call);
+}
+
+sub start_connect
+{
+ my $call = uc shift;
+ my $lccall = lc $call;
+
+ my $prog = "$main::root/local/client.pl";
+ $prog = "$main::root/perl/client.pl" if ! -e $prog;
+
+ my $pid = fork();
+ if (defined $pid) {
+ if (!$pid) {
+ # in child, unset warnings, disable debugging and general clean up from us
+ $^W = 0;
+ eval "{ package DB; sub DB {} }";
+ $SIG{HUP} = 'IGNORE';
+ alarm(0);
+ DXChannel::closeall();
+ $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = $SIG{__WARN__} = 'DEFAULT';
+ exec $prog, $call, 'connect';
+ dbg('cron', "exec '$prog' failed $!");
+ }
+ dbg('cron', "connect to $call started");
+ } else {
+ dbg('cron', "can't fork for $prog $!");
+ }
+ # coordinate
+ sleep(1);
}
+sub spawn
+{
+ my $line = shift;
+
+ my $pid = fork();
+ if (defined $pid) {
+ if (!$pid) {
+ # in child, unset warnings, disable debugging and general clean up from us
+ $^W = 0;
+ eval "{ package DB; sub DB {} }";
+ $SIG{HUP} = 'IGNORE';
+ alarm(0);
+ DXChannel::closeall();
+ $SIG{CHLD} = $SIG{TERM} = $SIG{INT} = $SIG{__WARN__} = 'DEFAULT';
+ exec "$line";
+ dbg('cron', "exec '$line' failed $!");
+ }
+ dbg('cron', "spawn of $line started");
+ } else {
+ dbg('cron', "can't fork for $line $!");
+ }
+
+ # coordinate
+ sleep(1);
+}
1;
__END__
projects / spider.git / blobdiff