in src/postgres/src_backend_postmaster_postmaster.c [415:471]
static void LogChildExit(int lev, const char *procname,
int pid, int exitstatus);
static void PostmasterStateMachine(void);
static void BackendInitialize(Port *port);
static void BackendRun(Port *port) pg_attribute_noreturn();
static void ExitPostmaster(int status) pg_attribute_noreturn();
static int ServerLoop(void);
static int BackendStartup(Port *port);
static int ProcessStartupPacket(Port *port, bool SSLdone);
static void SendNegotiateProtocolVersion(List *unrecognized_protocol_options);
static void processCancelRequest(Port *port, void *pkt);
static int initMasks(fd_set *rmask);
static void report_fork_failure_to_client(Port *port, int errnum);
static CAC_state canAcceptConnections(void);
static bool RandomCancelKey(int32 *cancel_key);
static void signal_child(pid_t pid, int signal);
static bool SignalSomeChildren(int signal, int targets);
static void TerminateChildren(int signal);
#define SignalChildren(sig) SignalSomeChildren(sig, BACKEND_TYPE_ALL)
static int CountChildren(int target);
static bool assign_backendlist_entry(RegisteredBgWorker *rw);
static void maybe_start_bgworkers(void);
static bool CreateOptsFile(int argc, char *argv[], char *fullprogname);
static pid_t StartChildProcess(AuxProcType type);
static void StartAutovacuumWorker(void);
static void MaybeStartWalReceiver(void);
static void InitPostmasterDeathWatchHandle(void);
/*
* Archiver is allowed to start up at the current postmaster state?
*
* If WAL archiving is enabled always, we are allowed to start archiver
* even during recovery.
*/
#define PgArchStartupAllowed() \
((XLogArchivingActive() && pmState == PM_RUN) || \
(XLogArchivingAlways() && \
(pmState == PM_RECOVERY || pmState == PM_HOT_STANDBY)))
#ifdef EXEC_BACKEND
#ifdef WIN32
#define WNOHANG 0 /* ignored, so any integer value will do */
static pid_t waitpid(pid_t pid, int *exitstatus, int options);
static void WINAPI pgwin32_deadchild_callback(PVOID lpParameter, BOOLEAN TimerOrWaitFired);
static HANDLE win32ChildQueue;
typedef struct
{
HANDLE waitHandle;
HANDLE procHandle;
DWORD procId;
} win32_deadchild_waitinfo;