2 # Shm.pl: Shared Memory stuff.
16 if (&IsParam("noSHM")) {
17 &status("Shared memory: Disabled. WARNING: bot may become unreliable");
21 if (defined( $_ = shmget($IPC_PRIVATE, $size, 0777) )) {
22 &status("Created shared memory (shm) key: [$_]");
25 &ERROR("openSHM: failed.");
26 &ERROR("Please delete some shared memory with ipcs or ipcrm.");
35 return '' if (!defined $key);
38 &status("Closed shared memory (shm) key: [$key]");
39 return shmctl($key, $IPC_RMID, 0);
48 return '' if (&IsParam("noSHM"));
50 if (shmread($key,$retval,$position,$size)) {
51 &DEBUG("shmRead($key): $retval");
54 &ERROR("shmRead: failed: $!");
55 ### TODO: if this fails, never try again.
66 return if (&IsParam("noSHM"));
68 if (length($str) > $size) {
69 &status("ERROR: length(str) (..)>$size...");
73 if (length($str) == 0) {
74 # does $size overwrite the whole lot?
75 # if not, set to 2000.
76 if (!shmwrite($key, '', $position, $size)) {
77 &ERROR("shmWrite: failed: $!");
82 my $read = &shmRead($key);
85 $str = sprintf("%s:%d:%d: ", $param{ircUser}, $bot_pid, time());
87 $str = $read ."||". $str;
90 if (!shmwrite($key, $str, $position, $size)) {
91 &DEBUG("shmWrite($key, $str)");
92 &ERROR("shmWrite: failed: $!");
100 # Usage: &addForked($name);
101 # Return: 1 for success, 0 for failure.
104 my $forker_timeout = 360; # 6mins, in seconds.
107 if (!defined $name) {
108 &WARN("addForked: name == NULL.");
112 foreach (keys %forked) {
114 my $time = time() - $forked{$n}{Time};
115 next unless ($time > $forker_timeout);
117 ### TODO: use &time2string()?
118 &WARN("Fork: looks like we lost '$n', executed $time ago");
120 my $pid = $forked{$n}{PID};
122 &WARN("Fork: no pid for $n.");
127 if ($pid == $bot_pid) {
128 # don't kill parent, just warn.
129 &status("Fork: pid == \$bot_pid == \$\$ ($bot_pid)");
131 } elsif ( -d "/proc/$pid") { # pid != bot_pid.
132 &status("Fork: killing $name ($pid)");
140 while (scalar keys %forked > 1) { # 2 or more == fail.
143 if ($count > 3) { # 3 seconds.
144 my $list = join(', ', keys %forked);
146 &msg($who, "exceeded allowed forked count (shm $shm): $list");
148 &status("Fork: I ran too many forked processes :) Giving up $name. Shm: $shm");
157 if (exists $forked{$name} and !scalar keys %{ $forked{$name} }) {
158 &WARN("addF: forked{$name} exists but is empty; deleting.");
159 undef $forked{$name};
162 if (exists $forked{$name} and scalar keys %{ $forked{$name} }) {
163 my $time = $forked{$name}{Time};
166 $continue++ if ($forked{$name}{PID} == $$);
169 &WARN("hrm.. fork pid == mypid == $$; how did this happen?");
171 } elsif ( -d "/proc/$forked{$name}{PID}") {
172 &status("fork: still running; good. BAIL OUT.");
176 &WARN("Found dead fork; removing and resetting.");
183 } elsif (time() - $time > 900) { # stale fork > 15m.
184 &status("forked: forked{$name} presumably exited without notifying us.");
186 } else { # fresh fork.
187 &msg($who, "$name is already running ". &Time2String(time() - $time));
192 $forked{$name}{Time} = time();
193 $forked{$name}{PID} = $$;
194 $forkedtime = time();
202 return if ($$ == $bot_pid);
204 if (!defined $name) {
205 &WARN("delForked: name == NULL.");
209 if ($name =~ /\.pl/) {
210 &WARN("dF: name is name of source file ($name). FIX IT!");
213 &showProc(); # just for informational purposes.
215 if (exists $forked{$name}) {
216 my $timestr = &Time2String(time() - $forked{$name}{Time});
217 &status("fork: took $timestr for $name.");
218 &shmWrite($shm,"DELETE FORK $name");
220 &ERROR("delForked: forked{$name} does not exist. should not happen.");
223 &status("--- fork finished for '$name' ---");
229 return if ($$ != $::bot_pid); # fork protection.
232 &ScheduleThis(15, "shmFlush");
233 return if ($_[0] eq "2");
237 my $shmmsg = &shmRead($shm);
238 # remove padded \0's.
240 return if (length($shmmsg) == 0);
241 if ($shmmsg =~ s/^(\S+):(\d+):(\d+): //) {
246 &status("warn: shmmsg='$shmmsg'.");
250 foreach (split '\|\|', $shmmsg) {
252 &VERB("shm: Processing '$_'.",2);
254 if (/^DCC SEND (\S+) (\S+)$/) {
255 my ($nick,$file) = ($1,$2);
256 if (exists $dcc{'SEND'}{$who}) {
257 &msg($nick, "DCC already active.");
259 &DEBUG("shm: dcc sending $2 to $1.");
260 $conn->new_send($1,$2);
261 $dcc{'SEND'}{$who} = time();
263 } elsif (/^SET FORKPID (\S+) (\S+)/) {
264 $forked{$1}{PID} = $2;
265 } elsif (/^DELETE FORK (\S+)$/) {
267 } elsif (/^EVAL (.*)$/) {
268 &DEBUG("evaling '$1'.");
271 &DEBUG("shm: unknown msg. ($_)");
275 &shmWrite($shm,"") if ($shmmsg ne "");