Instance.cc File Reference

#include "squid.h"
#include "base/File.h"
#include "debug/Messages.h"
#include "fs_io.h"
#include "Instance.h"
#include "parser/Tokenizer.h"
#include "sbuf/Stream.h"
#include "SquidConfig.h"
#include "tools.h"
#include <cerrno>

Include dependency graph for Instance.cc:

Go to the source code of this file.

Functions
static SBuf	PidFilenameCalc ()
static SBuf	PidFileDescription (const SBuf &filename)
static SBuf	PidFilename ()
static pid_t	GetOtherPid (File &pidFile)
static bool	ProcessIsRunning (const pid_t pid)
	determines whether a given process is running at the time of the call More...
static void	ThrowIfAlreadyRunningWith (File &pidFile)
	quits if another Squid instance (that owns the given PID file) is running More...
static void	RemoveInstance ()
	atexit() handler; removes the PID file created with Instance::WriteOurPid() More...

Variables
static SBuf	TheFile
static SBuf	ThePidFileToRemove
	ties Instance::WriteOurPid() scheduler and RemoveInstance(void) handler More...

Function Documentation

GetOtherPid()

static pid_t GetOtherPid ( File &  pidFile )

static

Returns

the PID of another Squid instance (or throws)

Definition at line 69 of file Instance.cc.

References CharacterSet::CR, debugs, CharacterSet::LF, File::readSmall(), TexcHere, TheFile, and ToSBuf().

Referenced by Instance::Other(), and ThrowIfAlreadyRunningWith().

PidFileDescription()

static SBuf PidFileDescription ( const SBuf &  filename )

static

Returns

PID file description for debugging messages and error reporting

Definition at line 52 of file Instance.cc.

References ToSBuf().

Referenced by PidFilename(), and RemoveInstance().

PidFilename()

static SBuf PidFilename ( )

static

Instance entry points are expected to call this first.

Returns

PidFilenameCalc() result while updating TheFile context

Definition at line 60 of file Instance.cc.

References PidFileDescription(), PidFilenameCalc(), and TheFile.

Referenced by Instance::Other(), Instance::ThrowIfAlreadyRunning(), and Instance::WriteOurPid().

PidFilenameCalc()

static SBuf PidFilenameCalc ( )

static

PidFilename() helper

Returns

PID file name or, if PID signaling was disabled, an empty SBuf

Definition at line 30 of file Instance.cc.

References SBuf::append(), SquidConfig::chroot_dir, Chrooted, Config, debugs, and SquidConfig::pidFilename.

Referenced by PidFilename().

ProcessIsRunning()

static bool ProcessIsRunning ( const pid_t  pid )

static

Definition at line 95 of file Instance.cc.

References debugs, pid, and xstrerr().

Referenced by ThrowIfAlreadyRunningWith().

RemoveInstance()

static void RemoveInstance ( void  )

static

Definition at line 162 of file Instance.cc.

References SBuf::c_str(), SBuf::clear(), debugs, enter_suid(), Important, SBuf::isEmpty(), leave_suid(), PidFileDescription(), safeunlink(), Debug::StopCacheLogUse(), and ThePidFileToRemove.

Referenced by Instance::WriteOurPid().

ThrowIfAlreadyRunningWith()

static void ThrowIfAlreadyRunningWith ( File &  pidFile )

static

Definition at line 107 of file Instance.cc.

References debugs, GetOtherPid(), pid, ProcessIsRunning(), TexcHere, TheFile, and ToSBuf().

Referenced by Instance::ThrowIfAlreadyRunning(), and Instance::WriteOurPid().

Variable Documentation

TheFile

SBuf TheFile

static

Describes the (last) instance PID file being processed. This hack shortens reporting code while keeping its messages consistent.

Definition at line 25 of file Instance.cc.

Referenced by GetOtherPid(), PidFilename(), Instance::ThrowIfAlreadyRunning(), ThrowIfAlreadyRunningWith(), and Instance::WriteOurPid().

ThePidFileToRemove

SBuf ThePidFileToRemove

static

Definition at line 158 of file Instance.cc.

Referenced by RemoveInstance(), and Instance::WriteOurPid().