X-Git-Url: http://dxcluster.org/gitweb/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=perl%2FDXCron.pm;h=3c9c04fb8bb015a7fb37a5c2cc541c55832fdfc5;hb=5d197c9f7aa2ea796d86aa5473f93956b24cf1b7;hp=dd78edd4ddeaf146a3c77280aa808099a1c56dfa;hpb=78ed3f6025103ec1c47c90725e37b417647d83c8;p=spider.git

diff --git a/perl/DXCron.pm b/perl/DXCron.pm
index dd78edd4..3c9c04fb 100644
--- a/perl/DXCron.pm
+++ b/perl/DXCron.pm
@@ -8,24 +8,223 @@
 
 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__