#
# Shm.pl: Shared Memory stuff.
-# Author: xk <xk@leguin.openprojects.net>
+# Author: dms
# Version: 20000201
# Created: 20000124
#
-if (&IsParam("useStrict")) { use strict; }
+# use strict; # TODO
+
+use POSIX qw(_exit);
+
+my %shm_keys;
sub openSHM {
my $IPC_PRIVATE = 0;
- my $size = 2000;
+ my $size = 2000;
+
+ if ( &IsParam('noSHM') ) {
+ &status('Shared memory: Disabled. WARNING: bot may become unreliable');
+ return 0;
+ }
- if (defined( $_ = shmget($IPC_PRIVATE, $size, 0777) )) {
- &status("Created shared memory (shm) key: [$_]");
- return $_;
- } else {
- &ERROR("openSHM: failed.");
- &ERROR("Please delete some shared memory with ipcs or ipcrm.");
- exit 1;
+ if ( defined( $_ = shmget( $IPC_PRIVATE, $size, 0777 ) ) ) {
+ &status("Created shared memory (shm) key: [$_]");
+ $shm_keys{$_} = {
+ time => time,
+ accessed => 0,
+ key => $_,
+ };
+ return $_;
+ }
+ else {
+ &ERROR('openSHM: failed.');
+ &ERROR('Please delete some shared memory with ipcs or ipcrm.');
+ exit 1;
}
}
my ($key) = @_;
my $IPC_RMID = 0;
+ return '' if ( !defined $key );
+
+ &shmFlush();
&status("Closed shared memory (shm) key: [$key]");
- return shmctl($key, $IPC_RMID, 0);
+ return shmctl( $key, $IPC_RMID, 0 );
}
sub shmRead {
- my ($key) = @_;
+ my ($key) = @_;
my $position = 0;
- my $size = 3*80;
- my $retval = '';
+ my $size = 3 * 80;
+ my $retval = '';
+
+ return '' if ( &IsParam('noSHM') );
- if (shmread($key,$retval,$position,$size)) {
- return $retval;
- } else {
- &ERROR("shmRead: failed: $!");
- return '';
+ if ( shmread( $key, $retval, $position, $size ) ) {
+
+ #&DEBUG("shmRead($key): $retval");
+ return $retval;
+ }
+ else {
+ &ERROR("shmRead: failed: $!");
+ if ( exists $shm_keys{$_} ) {
+ closeSHM($key);
+ }
+ ### TODO: if this fails, never try again.
+ # What use is opening a SHM segment if we're not going to read it?
+ # &openSHM();
+ return '';
}
}
sub shmWrite {
- my ($key, $str) = @_;
+ my ( $key, $str ) = @_;
my $position = 0;
- my $size = 80*3;
+ my $size = 80 * 3;
+
+ return if ( &IsParam('noSHM') );
+
+ $shm_keys{$keys}{accessed} = 1;
+
+ if ( length($str) > $size ) {
+ &status("ERROR: length(str) (..)>$size...");
+ return;
+ }
+
+ if ( length($str) == 0 ) {
+
+ # does $size overwrite the whole lot?
+ # if not, set to 2000.
+ if ( !shmwrite( $key, '', $position, $size ) ) {
+ &ERROR("shmWrite: failed: $!");
+ }
+ return;
+ }
- # NULL hack.
- ### TODO: create shmClear to deal with this.
- if ($str !~ /^$/) {
- my $read = &shmRead($key);
- $read =~ s/\0+//g;
- $str = $read ."||". $str if ($read ne "");
+ my $read = &shmRead($key);
+ $read =~ s/\0+//g;
+ if ( $read eq '' ) {
+ $str = sprintf( '%s:%d:%d: ', $param{ircUser}, $bot_pid, time() );
+ }
+ else {
+ $str = $read . '||' . $str;
}
- if (!shmwrite($key,$str,$position,$size)) {
- &ERROR("shmWrite: failed: $!");
+ if ( !shmwrite( $key, $str, $position, $size ) ) {
+ &DEBUG("shmWrite($key, $str)");
+ &ERROR("shmWrite: failed: $!");
}
}
-#######
-# Helpers
-#
+##############
+### Helpers
+###
# Usage: &addForked($name);
# Return: 1 for success, 0 for failure.
sub addForked {
my ($name) = @_;
- my $forker_timeout = 360; # 6mins, in seconds.
+ my $forker_timeout = 360; # 6mins, in seconds.
+ $forker = $name;
+
+ if ( !defined $name ) {
+ &WARN('addForked: name == NULL.');
+ return 0;
+ }
+
+ foreach ( keys %forked ) {
+ my $n = $_;
+ my $time = time() - $forked{$n}{Time};
+ next unless ( $time > $forker_timeout );
+
+ ### TODO: use &time2string()?
+ &WARN("Fork: looks like we lost '$n', executed $time ago");
+
+ my $pid = $forked{$n}{PID};
+ if ( !defined $pid ) {
+ &WARN("Fork: no pid for $n.");
+ delete $forked{$n};
+ next;
+ }
- foreach (keys %forked) {
- my $time = time() - $forked{$_};
- next unless ($time > $forker_timeout);
+ if ( $pid == $bot_pid ) {
- ### TODO: use &time2string()?
- &WARN("Fork: looks like we lost '$_', executed $time ago.");
- delete $forked{$_};
+ # don't kill parent, just warn.
+ &status("Fork: pid == \$bot_pid == \$\$ ($bot_pid)");
+
+ }
+ elsif ( -d "/proc/$pid" ) { # pid != bot_pid.
+ &status("Fork: killing $name ($pid)");
+ kill 9, $pid;
+ }
+
+ delete $forked{$n};
}
my $count = 0;
- while (scalar keys %forked > 2) { # 2 or more == fail.
- sleep 1;
-
- if ($count > 3) { # 3 seconds.
- my $list = join(', ', keys %forked);
- if (defined $who) {
- &msg($who, "already running ($list) => exceeded allowed forked processes count (1?).");
- } else {
- &status("Fork: I ran too many forked processes :) Giving up $name.");
- }
- return 0;
- }
-
- $count++;
- }
-
- if (exists $forked{$name}) {
- my $time = $forked{$name};
- if (time() - $forked{$name} > 900) { # stale fork > 15m.
- &status("forked: forked{$name} presumably exited without notifying us.");
- $forked{$name} = time();
- return 1;
- } else { # fresh fork.
- &msg($who, "$name is already running ". &Time2String(time() - $forked{$name}));
- return 0;
- }
- } else {
- $forked{$name} = time();
- $count{'Fork'}++;
- return 1;
+ while ( scalar keys %forked > 1 ) { # 2 or more == fail.
+ sleep 1;
+
+ if ( $count > 3 ) { # 3 seconds.
+ my $list = join( ', ', keys %forked );
+ if ( defined $who ) {
+ &msg( $who, "exceeded allowed forked count (shm $shm): $list" );
+ }
+ else {
+ &status(
+"Fork: I ran too many forked processes :) Giving up $name. Shm: $shm"
+ );
+ }
+
+ return 0;
+ }
+
+ $count++;
+ }
+
+ if ( exists $forked{$name} and !scalar keys %{ $forked{$name} } ) {
+ &WARN("addF: forked{$name} exists but is empty; deleting.");
+ undef $forked{$name};
+ }
+
+ if ( exists $forked{$name} and scalar keys %{ $forked{$name} } ) {
+ my $time = $forked{$name}{Time};
+ my $continue = 0;
+
+ $continue++ if ( $forked{$name}{PID} == $$ );
+
+ if ($continue) {
+ &WARN("hrm.. fork pid == mypid == $$; how did this happen?");
+
+ }
+ elsif ( -d "/proc/$forked{$name}{PID}" ) {
+ &status('fork: still running; good. BAIL OUT.');
+ return 0;
+
+ }
+ else {
+ &WARN('Found dead fork; removing and resetting.');
+ $continue = 1;
+ }
+
+ if ($continue) {
+
+ # NOTHING.
+
+ }
+ elsif ( time() - $time > 900 ) { # stale fork > 15m.
+ &status(
+ "forked: forked{$name} presumably exited without notifying us."
+ );
+
+ }
+ else { # fresh fork.
+ &msg( $who,
+ "$name is already running " . &Time2String( time() - $time ) );
+ return 0;
+ }
}
+
+ $forked{$name}{Time} = time();
+ $forked{$name}{PID} = $$;
+ $forkedtime = time();
+ $count{'Fork'}++;
+ return 1;
}
sub delForked {
my ($name) = @_;
- if (exists $forked{$name}) {
- my $timestr = &Time2String(time() - $forked{$name});
- &status("fork: took $timestr for $name.");
- &shmWrite($shm,"DELETE FORK $name");
- return 1;
- } else {
- &ERROR("delForked: forked{$name} does not exist. should not happen.");
- return 0;
+ return if ( $$ == $bot_pid );
+
+ if ( !defined $name ) {
+ &WARN('delForked: name == NULL.');
+ POSIX::_exit(0);
+ }
+
+ if ( $name =~ /\.pl/ ) {
+ &WARN("dF: name is name of source file ($name). FIX IT!");
+ }
+
+ &showProc(); # just for informational purposes.
+
+ if ( exists $forked{$name} ) {
+ my $timestr = &Time2String( time() - $forked{$name}{Time} );
+ &status("fork: took $timestr for $name.");
+ &shmWrite( $shm, "DELETE FORK $name" );
}
+ else {
+ &ERROR("delForked: forked{$name} does not exist. should not happen.");
+ }
+
+ &status("--- fork finished for '$name' ---");
+
+ POSIX::_exit(0);
+}
+
+sub shmFlush {
+ return if ( $$ != $::bot_pid ); # fork protection.
+
+ if (@_) {
+ &ScheduleThis( 15 * 60, 'shmFlush' ); # 15 minutes
+ return if ( $_[0] eq '2' );
+ }
+
+ my $time;
+ my $shmmsg = &shmRead($shm);
+
+ # remove padded \0's.
+ $shmmsg =~ s/\0//g;
+ return if ( length($shmmsg) == 0 );
+ if ( $shmmsg =~ s/^(\S+):(\d+):(\d+): // ) {
+ my $n = $1;
+ my $pid = $2;
+ $time = $3;
+ }
+ else {
+ &status("warn: shmmsg='$shmmsg'.");
+ return;
+ }
+
+ foreach ( split '\|\|', $shmmsg ) {
+ next if (/^$/);
+ &VERB( "shm: Processing '$_'.", 2 );
+
+ if (/^DCC SEND (\S+) (\S+)$/) {
+ my ( $nick, $file ) = ( $1, $2 );
+ if ( exists $dcc{'SEND'}{$who} ) {
+ &msg( $nick, 'DCC already active.' );
+ }
+ else {
+ &DEBUG("shm: dcc sending $2 to $1.");
+ $conn->new_send( $1, $2 );
+ $dcc{'SEND'}{$who} = time();
+ }
+ }
+ elsif (/^SET FORKPID (\S+) (\S+)/) {
+ $forked{$1}{PID} = $2;
+ }
+ elsif (/^DELETE FORK (\S+)$/) {
+ delete $forked{$1};
+ }
+ elsif (/^EVAL (.*)$/) {
+ &DEBUG("evaling '$1'.");
+ eval $1;
+ }
+ else {
+ &DEBUG("shm: unknown msg. ($_)");
+ }
+ }
+
+ &shmWrite( $shm, '' ) if ( $shmmsg ne '' );
}
1;
+
+# vim:ts=4:sw=4:expandtab:tw=80
projects / infobot.git / blobdiff