1 /*------------------------------------------------------------------------- 2 * 3 * postmaster.h 4 * Exports from postmaster/postmaster.c. 5 * 6 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group 7 * Portions Copyright (c) 1994, Regents of the University of California 8 * 9 * src/include/postmaster/postmaster.h 10 * 11 *------------------------------------------------------------------------- 12 */ 13 #ifndef _POSTMASTER_H 14 #define _POSTMASTER_H 15 16 /* GUC options */ 17 extern bool EnableSSL; 18 extern int ReservedBackends; 19 extern PGDLLIMPORT int PostPortNumber; 20 extern int Unix_socket_permissions; 21 extern char *Unix_socket_group; 22 extern char *Unix_socket_directories; 23 extern char *ListenAddresses; 24 extern bool ClientAuthInProgress; 25 extern int PreAuthDelay; 26 extern int AuthenticationTimeout; 27 extern bool Log_connections; 28 extern bool log_hostname; 29 extern bool enable_bonjour; 30 extern char *bonjour_name; 31 extern bool restart_after_crash; 32 33 #ifdef WIN32 34 extern HANDLE PostmasterHandle; 35 #else 36 extern int postmaster_alive_fds[2]; 37 38 /* 39 * Constants that represent which of postmaster_alive_fds is held by 40 * postmaster, and which is used in children to check for postmaster death. 41 */ 42 #define POSTMASTER_FD_WATCH 0 /* used in children to check for 43 * postmaster death */ 44 #define POSTMASTER_FD_OWN 1 /* kept open by postmaster only */ 45 #endif 46 47 extern PGDLLIMPORT const char *progname; 48 49 extern void PostmasterMain(int argc, char *argv[]) pg_attribute_noreturn(); 50 extern void ClosePostmasterPorts(bool am_syslogger); 51 52 extern int MaxLivePostmasterChildren(void); 53 54 extern int GetNumShmemAttachedBgworkers(void); 55 extern bool PostmasterMarkPIDForWorkerNotify(int); 56 57 #ifdef EXEC_BACKEND 58 extern pid_t postmaster_forkexec(int argc, char *argv[]); 59 extern void SubPostmasterMain(int argc, char *argv[]) pg_attribute_noreturn(); 60 61 extern Size ShmemBackendArraySize(void); 62 extern void ShmemBackendArrayAllocation(void); 63 #endif 64 65 /* 66 * Note: MAX_BACKENDS is limited to 2^18-1 because that's the width reserved 67 * for buffer references in buf_internals.h. This limitation could be lifted 68 * by using a 64bit state; but it's unlikely to be worthwhile as 2^18-1 69 * backends exceed currently realistic configurations. Even if that limitation 70 * were removed, we still could not a) exceed 2^23-1 because inval.c stores 71 * the backend ID as a 3-byte signed integer, b) INT_MAX/4 because some places 72 * compute 4*MaxBackends without any overflow check. This is rechecked in the 73 * relevant GUC check hooks and in RegisterBackgroundWorker(). 74 */ 75 #define MAX_BACKENDS 0x3FFFF 76 77 #endif /* _POSTMASTER_H */ 78