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: $!");
57 ### TODO: create shmClear to deal with this.
59 my $read = &shmRead($key);
61 $str = $read ."||". $str if ($read ne "");
64 if (!shmwrite($key,$str,$position,$size)) {
65 &ERROR("shmWrite: failed: $!");
73 # Usage: &addForked($name);
74 # Return: 1 for success, 0 for failure.
77 my $forker_timeout = 360; # 6mins, in seconds.
81 &WARN("addForked: name == NULL.");
85 foreach (keys %forked) {
86 my $time = time() - $forked{$_}{Time};
87 next unless ($time > $forker_timeout);
89 ### TODO: use &time2string()?
90 &WARN("Fork: looks like we lost '$_', executed $time ago.");
95 while (scalar keys %forked > 1) { # 2 or more == fail.
98 if ($count > 3) { # 3 seconds.
99 my $list = join(', ', keys %forked);
101 &msg($who, "already running ($list) => exceeded allowed forked processes count (1?).");
103 &status("Fork: I ran too many forked processes :) Giving up $name.");
111 if (exists $forked{$name}) {
112 my $time = $forked{$name}{Time};
115 if (-d "/proc/$forked{$name}{PID}") {
116 &status("fork: still running; good. BAIL OUT.");
118 &WARN("Found dead fork; removing and resetting.");
124 } elsif (time() - $time > 900) { # stale fork > 15m.
125 &status("forked: forked{$name} presumably exited without notifying us.");
126 } else { # fresh fork.
127 &msg($who, "$name is already running ". &Time2String(time() - $time));
132 $forked{$name}{Time} = time();
133 $forkedtime = time();
141 return if ($$ == $bot_pid);
143 if (!defined $name) {
144 &WARN("delForked: name == NULL.");
148 &showProc(); # just for informational purposes.
150 if (exists $forked{$name}) {
151 my $timestr = &Time2String(time() - $forked{$name}{Time});
152 &status("fork: took $timestr for $name.");
153 &shmWrite($shm,"DELETE FORK $name");
155 &ERROR("delForked: forked{$name} does not exist. should not happen.");
158 &status("--- fork finished for '$name' ---");