code related to Squid Instance and PID file management

Functions
void	ThrowIfAlreadyRunning ()

void	WriteOurPid ()
	creates a PID file; throws on error More...

pid_t	Other ()

Function Documentation

pid_t Instance::Other ( )

Returns: another Squid instance PID Throws if PID file maintenance is disabled.

Definition at line 127 of file Instance.cc.

References GetOtherPid(), PidFilename(), FileOpeningConfig::ReadOnly(), and TexcHere.

Referenced by sendSignal().

void Instance::ThrowIfAlreadyRunning ( )

Usually throws if another Squid instance is running. False positives are highly unlikely, but the caller must tolerate false negatives well: We may not detect another running instance and, hence, may not throw. Does nothing if PID file maintenance is disabled.

Definition at line 138 of file Instance.cc.

References debugs, File::Optional(), PidFilename(), FileOpeningConfig::ReadOnly(), and ThrowIfAlreadyRunningWith().

Referenced by SquidMain().

void Instance::WriteOurPid ( )

Creates or updates the PID file for the current process. Does nothing if PID file maintenance is disabled.

Definition at line 177 of file Instance.cc.

References DBG_IMPORTANT, debugs, Must, PidFilename(), SBuf::Printf(), FileOpeningConfig::ReadWrite(), RemoveInstance(), File::synchronize(), ThrowIfAlreadyRunningWith(), File::truncate(), and File::writeAll().