backend_startup.h File Reference

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Data Structures
struct	BackendStartupData

Typedefs
typedef enum CAC_state	CAC_state
typedef struct BackendStartupData	BackendStartupData

Enumerations
enum	CAC_state {   CAC_OK , CAC_STARTUP , CAC_SHUTDOWN , CAC_RECOVERY ,   CAC_NOTCONSISTENT , CAC_TOOMANY }

Functions
void	BackendMain (char *startup_data, size_t startup_data_len) pg_attribute_noreturn()

Variables
PGDLLIMPORT bool	Trace_connection_negotiation

Typedef Documentation

BackendStartupData

typedef struct BackendStartupData BackendStartupData

CAC_state

typedef enum CAC_state CAC_state

Enumeration Type Documentation

CAC_state

enum CAC_state

Enumerator
CAC_OK
CAC_STARTUP
CAC_SHUTDOWN
CAC_RECOVERY
CAC_NOTCONSISTENT
CAC_TOOMANY

Definition at line 26 of file backend_startup.h.

{
    CAC_OK,
    CAC_STARTUP,
    CAC_SHUTDOWN,
    CAC_RECOVERY,
    CAC_NOTCONSISTENT,
    CAC_TOOMANY,
} CAC_state;

Function Documentation

BackendMain()

void BackendMain	(	char *	startup_data,
		size_t	startup_data_len
	)

Definition at line 58 of file backend_startup.c.

{
    BackendStartupData *bsdata = (BackendStartupData *) startup_data;
 
    Assert(startup_data_len == sizeof(BackendStartupData));
    Assert(MyClientSocket != NULL);
 
#ifdef EXEC_BACKEND
 
    /*
     * Need to reinitialize the SSL library in the backend, since the context
     * structures contain function pointers and cannot be passed through the
     * parameter file.
     *
     * If for some reason reload fails (maybe the user installed broken key
     * files), soldier on without SSL; that's better than all connections
     * becoming impossible.
     *
     * XXX should we do this in all child processes?  For the moment it's
     * enough to do it in backend children.
     */
#ifdef USE_SSL
    if (EnableSSL)
    {
        if (secure_initialize(false) == 0)
            LoadedSSL = true;
        else
            ereport(LOG,
                    (errmsg("SSL configuration could not be loaded in child process")));
    }
#endif
#endif
 
    /* Perform additional initialization and collect startup packet */
    BackendInitialize(MyClientSocket, bsdata->canAcceptConnections);
 
    /*
     * Create a per-backend PGPROC struct in shared memory.  We must do this
     * before we can use LWLocks or access any shared memory.
     */
    InitProcess();
 
    /*
     * Make sure we aren't in PostmasterContext anymore.  (We can't delete it
     * just yet, though, because InitPostgres will need the HBA data.)
     */
    MemoryContextSwitchTo(TopMemoryContext);
 
    PostgresMain(MyProcPort->database_name, MyProcPort->user_name);
}

References Assert, BackendInitialize(), BackendStartupData::canAcceptConnections, Port::database_name, EnableSSL, ereport, errmsg(), InitProcess(), LoadedSSL, LOG, MemoryContextSwitchTo(), MyClientSocket, MyProcPort, PostgresMain(), secure_initialize(), TopMemoryContext, and Port::user_name.

Variable Documentation

Trace_connection_negotiation

PGDLLIMPORT bool Trace_connection_negotiation

extern

Definition at line 42 of file backend_startup.c.

Referenced by ProcessSSLStartup(), and ProcessStartupPacket().