57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* pidfile.h
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* Declarations describing the data directory lock file (postmaster.pid)
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*
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* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/utils/pidfile.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef UTILS_PIDFILE_H
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#define UTILS_PIDFILE_H
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/*
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* As of Postgres 10, the contents of the data-directory lock file are:
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*
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* line #
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* 1 postmaster PID (or negative of a standalone backend's PID)
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* 2 data directory path
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* 3 postmaster start timestamp (time_t representation)
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* 4 port number
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* 5 first Unix socket directory path (empty if none)
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* 6 first listen_address (IP address or "*"; empty if no TCP port)
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* 7 shared memory key (empty on Windows)
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* 8 postmaster status (see values below)
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*
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* Lines 6 and up are added via AddToDataDirLockFile() after initial file
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* creation; also, line 5 is initially empty and is changed after the first
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* Unix socket is opened. Onlookers should not assume that lines 4 and up
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* are filled in any particular order.
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*
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* Socket lock file(s), if used, have the same contents as lines 1-5, with
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* line 5 being their own directory.
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*/
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#define LOCK_FILE_LINE_PID 1
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#define LOCK_FILE_LINE_DATA_DIR 2
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#define LOCK_FILE_LINE_START_TIME 3
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#define LOCK_FILE_LINE_PORT 4
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#define LOCK_FILE_LINE_SOCKET_DIR 5
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#define LOCK_FILE_LINE_LISTEN_ADDR 6
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#define LOCK_FILE_LINE_SHMEM_KEY 7
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#define LOCK_FILE_LINE_PM_STATUS 8
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/*
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* The PM_STATUS line may contain one of these values. All these strings
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* must be the same length, per comments for AddToDataDirLockFile().
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* We pad with spaces as needed to make that true.
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*/
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#define PM_STATUS_STARTING "starting" /* still starting up */
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#define PM_STATUS_STOPPING "stopping" /* in shutdown sequence */
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#define PM_STATUS_READY "ready " /* ready for connections */
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#define PM_STATUS_STANDBY "standby " /* up, won't accept connections */
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#endif /* UTILS_PIDFILE_H */
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