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);
65 $str = time().": "; # time stamping, null.
66 } elsif ($read eq "") {
67 $str = time().": "; # timestamping.
69 $str = $read ."||". $str;
73 if (!shmwrite($key,$str,$position,$size)) {
74 &ERROR("shmWrite: failed: $!");
82 # Usage: &addForked($name);
83 # Return: 1 for success, 0 for failure.
86 my $forker_timeout = 360; # 6mins, in seconds.
90 &WARN("addForked: name == NULL.");
94 foreach (keys %forked) {
95 my $time = time() - $forked{$_}{Time};
96 next unless ($time > $forker_timeout);
98 ### TODO: use &time2string()?
99 &WARN("Fork: looks like we lost '$_', executed $time ago");
101 my $pid = $forked{$name}{PID};
104 &status("Fork: pid == \$\$ ($$)");
108 if ( -d "/proc/$pid") {
109 &status("Fork: killing $name ($pid)");
113 delete $forked{$name};
117 while (scalar keys %forked > 1) { # 2 or more == fail.
120 if ($count > 3) { # 3 seconds.
121 my $list = join(', ', keys %forked);
123 &msg($who, "already running ($list) => exceeded allowed forked processes count (1?).");
125 &status("Fork: I ran too many forked processes :) Giving up $name.");
133 if (exists $forked{$name} and !scalar keys %{ $forked{$name} }) {
134 &WARN("addF: forked{$name} exists but is empty; deleting.");
135 undef $forked{$name};
138 if (exists $forked{$name} and scalar keys %{ $forked{$name} }) {
139 my $time = $forked{$name}{Time};
142 $continue++ if ($forked{$name}{PID} == $$);
145 &WARN("hrm.. fork pid == mypid == $$; how did this happen?");
147 } elsif ( -d "/proc/$forked{$name}{PID}") {
148 &status("fork: still running; good. BAIL OUT.");
152 &WARN("Found dead fork; removing and resetting.");
159 } elsif (time() - $time > 900) { # stale fork > 15m.
160 &status("forked: forked{$name} presumably exited without notifying us.");
162 } else { # fresh fork.
163 &msg($who, "$name is already running ". &Time2String(time() - $time));
168 $forked{$name}{Time} = time();
169 $forked{$name}{PID} = $$;
170 $forkedtime = time();
178 return if ($$ == $bot_pid);
180 if (!defined $name) {
181 &WARN("delForked: name == NULL.");
185 if ($name =~ /\.pl/) {
186 &WARN("dF: name is name of source file ($name). FIX IT!");
189 &showProc(); # just for informational purposes.
191 if (exists $forked{$name}) {
192 my $timestr = &Time2String(time() - $forked{$name}{Time});
193 &status("fork: took $timestr for $name.");
194 &shmWrite($shm,"DELETE FORK $name");
196 &ERROR("delForked: forked{$name} does not exist. should not happen.");
199 &status("--- fork finished for '$name' ---");