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)) {
53 &ERROR("shmRead: failed: $!");
54 ### TODO: if this fails, never try again.
65 return if (&IsParam("noSHM"));
68 ### TODO: create shmClear to deal with this.
70 my $read = &shmRead($key);
74 $str = time().": "; # time stamping, null.
75 } elsif ($read eq "") {
76 $str = time().": "; # timestamping.
78 $str = $read ."||". $str;
82 if (!shmwrite($key,$str,$position,$size)) {
83 &ERROR("shmWrite: failed: $!");
91 # Usage: &addForked($name);
92 # Return: 1 for success, 0 for failure.
95 my $forker_timeout = 360; # 6mins, in seconds.
99 &WARN("addForked: name == NULL.");
103 foreach (keys %forked) {
105 my $time = time() - $forked{$n}{Time};
106 next unless ($time > $forker_timeout);
108 ### TODO: use &time2string()?
109 &WARN("Fork: looks like we lost '$n', executed $time ago");
111 my $pid = $forked{$n}{PID};
113 &WARN("Fork: no pid for $n.");
118 if ($pid == $bot_pid) {
119 # don't kill parent, just warn.
120 &status("Fork: pid == \$bot_pid == \$\$ ($bot_pid)");
122 } elsif ( -d "/proc/$pid") { # pid != bot_pid.
123 &status("Fork: killing $name ($pid)");
131 while (scalar keys %forked > 1) { # 2 or more == fail.
134 if ($count > 3) { # 3 seconds.
135 my $list = join(', ', keys %forked);
137 &msg($who, "exceeded allowed forked count: $list");
139 &status("Fork: I ran too many forked processes :) Giving up $name.");
148 if (exists $forked{$name} and !scalar keys %{ $forked{$name} }) {
149 &WARN("addF: forked{$name} exists but is empty; deleting.");
150 undef $forked{$name};
153 if (exists $forked{$name} and scalar keys %{ $forked{$name} }) {
154 my $time = $forked{$name}{Time};
157 $continue++ if ($forked{$name}{PID} == $$);
160 &WARN("hrm.. fork pid == mypid == $$; how did this happen?");
162 } elsif ( -d "/proc/$forked{$name}{PID}") {
163 &status("fork: still running; good. BAIL OUT.");
167 &WARN("Found dead fork; removing and resetting.");
174 } elsif (time() - $time > 900) { # stale fork > 15m.
175 &status("forked: forked{$name} presumably exited without notifying us.");
177 } else { # fresh fork.
178 &msg($who, "$name is already running ". &Time2String(time() - $time));
183 $forked{$name}{Time} = time();
184 $forked{$name}{PID} = $$;
185 $forkedtime = time();
193 return if ($$ == $bot_pid);
195 if (!defined $name) {
196 &WARN("delForked: name == NULL.");
200 if ($name =~ /\.pl/) {
201 &WARN("dF: name is name of source file ($name). FIX IT!");
204 &showProc(); # just for informational purposes.
206 if (exists $forked{$name}) {
207 my $timestr = &Time2String(time() - $forked{$name}{Time});
208 &status("fork: took $timestr for $name.");
209 &shmWrite($shm,"DELETE FORK $name");
211 &ERROR("delForked: forked{$name} does not exist. should not happen.");
214 &status("--- fork finished for '$name' ---");
220 return if ($$ != $::bot_pid); # fork protection.
223 &ScheduleThis(5, "shmFlush");
224 return if ($_[0] eq "2");
228 my $shmmsg = &shmRead($shm);
229 $shmmsg =~ s/\0//g; # remove padded \0's.
230 if ($shmmsg =~ s/^(\d+): //) {
234 foreach (split '\|\|', $shmmsg) {
236 &VERB("shm: Processing '$_'.",2);
238 if (/^DCC SEND (\S+) (\S+)$/) {
239 my ($nick,$file) = ($1,$2);
240 if (exists $dcc{'SEND'}{$who}) {
241 &msg($nick, "DCC already active.");
243 &DEBUG("shm: dcc sending $2 to $1.");
244 $conn->new_send($1,$2);
245 $dcc{'SEND'}{$who} = time();
247 } elsif (/^SET FORKPID (\S+) (\S+)/) {
248 $forked{$1}{PID} = $2;
249 } elsif (/^DELETE FORK (\S+)$/) {
251 } elsif (/^EVAL (.*)$/) {
252 &DEBUG("evaling '$1'.");
255 &DEBUG("shm: unknown msg. ($_)");
259 &shmWrite($shm,"") if ($shmmsg ne "");