2 # Shm.pl: Shared Memory stuff.
8 if (&IsParam("useStrict")) { use strict; }
16 if (defined( $_ = shmget($IPC_PRIVATE, $size, 0777) )) {
17 &status("Created shared memory (shm) key: [$_]");
20 &ERROR("openSHM: failed.");
21 &ERROR("Please delete some shared memory with ipcs or ipcrm.");
30 return '' if (!defined $key);
33 &status("Closed shared memory (shm) key: [$key]");
34 return shmctl($key, $IPC_RMID, 0);
43 if (shmread($key,$retval,$position,$size)) {
46 &ERROR("shmRead: failed: $!");
47 ### TODO: if this fails, never try again.
59 ### TODO: create shmClear to deal with this.
61 my $read = &shmRead($key);
63 $str = $read ."||". $str if ($read ne "");
66 if (!shmwrite($key,$str,$position,$size)) {
67 &ERROR("shmWrite: failed: $!");
75 # Usage: &addForked($name);
76 # Return: 1 for success, 0 for failure.
79 my $forker_timeout = 360; # 6mins, in seconds.
83 &WARN("addForked: name == NULL.");
87 foreach (keys %forked) {
88 my $time = time() - $forked{$_}{Time};
89 next unless ($time > $forker_timeout);
91 ### TODO: use &time2string()?
92 &WARN("Fork: looks like we lost '$_', executed $time ago.");
97 while (scalar keys %forked > 1) { # 2 or more == fail.
100 if ($count > 3) { # 3 seconds.
101 my $list = join(', ', keys %forked);
103 &msg($who, "already running ($list) => exceeded allowed forked processes count (1?).");
105 &status("Fork: I ran too many forked processes :) Giving up $name.");
113 if (exists $forked{$name}) {
114 my $time = $forked{$name}{Time};
117 if (-d "/proc/$forked{$name}{PID}") {
118 &status("fork: still running; good. BAIL OUT.");
120 &WARN("Found dead fork; removing and resetting.");
126 } elsif (time() - $time > 900) { # stale fork > 15m.
127 &status("forked: forked{$name} presumably exited without notifying us.");
128 } else { # fresh fork.
129 &msg($who, "$name is already running ". &Time2String(time() - $time));
134 $forked{$name}{Time} = time();
135 $forkedtime = time();
143 return if ($$ == $bot_pid);
145 if (!defined $name) {
146 &WARN("delForked: name == NULL.");
150 &showProc(); # just for informational purposes.
152 if (exists $forked{$name}) {
153 my $timestr = &Time2String(time() - $forked{$name}{Time});
154 &status("fork: took $timestr for $name.");
155 &shmWrite($shm,"DELETE FORK $name");
157 &ERROR("delForked: forked{$name} does not exist. should not happen.");
160 &status("--- fork finished for '$name' ---");