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@ -62,6 +62,7 @@ typedef enum |
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START_COMMAND, |
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STOP_COMMAND, |
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RESTART_COMMAND, |
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PROMOTE_COMMAND, |
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RELOAD_COMMAND, |
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STATUS_COMMAND, |
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KILL_COMMAND, |
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@ -96,6 +97,7 @@ static char postopts_file[MAXPGPATH]; |
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static char pid_file[MAXPGPATH]; |
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static char backup_file[MAXPGPATH]; |
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static char recovery_file[MAXPGPATH]; |
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static char promote_file[MAXPGPATH]; |
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#if defined(WIN32) || defined(__CYGWIN__) |
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static DWORD pgctl_start_type = SERVICE_AUTO_START; |
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@ -124,6 +126,7 @@ static void do_init(void); |
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static void do_start(void); |
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static void do_stop(void); |
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static void do_restart(void); |
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static void do_promote(void); |
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static void do_reload(void); |
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static void do_status(void); |
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static void do_kill(pgpid_t pid); |
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@ -872,7 +875,7 @@ do_stop(void) |
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/*
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* restart/reload routines |
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* restart/promote/reload routines |
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*/ |
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static void |
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@ -965,6 +968,66 @@ do_restart(void) |
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do_start(); |
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} |
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static void |
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do_promote(void) |
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{ |
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FILE *prmfile; |
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pgpid_t pid; |
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struct stat statbuf; |
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pid = get_pgpid(); |
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if (pid == 0) /* no pid file */ |
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{ |
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write_stderr(_("%s: PID file \"%s\" does not exist\n"), progname, pid_file); |
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write_stderr(_("Is server running?\n")); |
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exit(1); |
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} |
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else if (pid < 0) /* standalone backend, not postmaster */ |
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{ |
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pid = -pid; |
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write_stderr(_("%s: cannot promote server; " |
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"single-user server is running (PID: %ld)\n"), |
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progname, pid); |
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exit(1); |
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} |
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/* If recovery.conf doesn't exist, the server is not in standby mode */ |
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if (stat(recovery_file, &statbuf) != 0) |
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{ |
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write_stderr(_("%s: cannot promote server; " |
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"server is not in standby mode\n"), |
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progname); |
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exit(1); |
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} |
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if ((prmfile = fopen(promote_file, "w")) == NULL) |
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{ |
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write_stderr(_("%s: could not create promote signal file \"%s\": %s\n"), |
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progname, promote_file, strerror(errno)); |
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exit(1); |
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} |
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if (fclose(prmfile)) |
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{ |
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write_stderr(_("%s: could not write promote signal file \"%s\": %s\n"), |
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progname, promote_file, strerror(errno)); |
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exit(1); |
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} |
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sig = SIGUSR1; |
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if (kill((pid_t) pid, sig) != 0) |
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{ |
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write_stderr(_("%s: could not send promote signal (PID: %ld): %s\n"), |
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progname, pid, strerror(errno)); |
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if (unlink(promote_file) != 0) |
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write_stderr(_("%s: could not remove promote signal file \"%s\": %s\n"), |
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progname, promote_file, strerror(errno)); |
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exit(1); |
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} |
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print_msg(_("server promoting\n")); |
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} |
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static void |
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do_reload(void) |
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@ -1617,7 +1680,7 @@ do_advice(void) |
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static void |
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do_help(void) |
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{ |
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printf(_("%s is a utility to start, stop, restart, reload configuration files,\n" |
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printf(_("%s is a utility to start, stop, restart, promote, reload configuration files,\n" |
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"report the status of a PostgreSQL server, or signal a PostgreSQL process.\n\n"), progname); |
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printf(_("Usage:\n")); |
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printf(_(" %s init[db] [-D DATADIR] [-s] [-o \"OPTIONS\"]\n"), progname); |
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@ -1625,6 +1688,7 @@ do_help(void) |
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printf(_(" %s stop [-W] [-t SECS] [-D DATADIR] [-s] [-m SHUTDOWN-MODE]\n"), progname); |
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printf(_(" %s restart [-w] [-t SECS] [-D DATADIR] [-s] [-m SHUTDOWN-MODE]\n" |
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" [-o \"OPTIONS\"]\n"), progname); |
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printf(_(" %s promote [-D DATADIR] [-s]\n"), progname); |
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printf(_(" %s reload [-D DATADIR] [-s]\n"), progname); |
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printf(_(" %s status [-D DATADIR]\n"), progname); |
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printf(_(" %s kill SIGNALNAME PID\n"), progname); |
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@ -1950,6 +2014,8 @@ main(int argc, char **argv) |
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ctl_command = STOP_COMMAND; |
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else if (strcmp(argv[optind], "restart") == 0) |
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ctl_command = RESTART_COMMAND; |
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else if (strcmp(argv[optind], "promote") == 0) |
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ctl_command = PROMOTE_COMMAND; |
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else if (strcmp(argv[optind], "reload") == 0) |
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ctl_command = RELOAD_COMMAND; |
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else if (strcmp(argv[optind], "status") == 0) |
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@ -2036,6 +2102,7 @@ main(int argc, char **argv) |
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snprintf(pid_file, MAXPGPATH, "%s/postmaster.pid", pg_data); |
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snprintf(backup_file, MAXPGPATH, "%s/backup_label", pg_data); |
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snprintf(recovery_file, MAXPGPATH, "%s/recovery.conf", pg_data); |
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snprintf(promote_file, MAXPGPATH, "%s/promote", pg_data); |
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} |
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switch (ctl_command) |
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@ -2055,6 +2122,9 @@ main(int argc, char **argv) |
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case RESTART_COMMAND: |
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do_restart(); |
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break; |
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case PROMOTE_COMMAND: |
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do_promote(); |
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break; |
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case RELOAD_COMMAND: |
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do_reload(); |
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break; |
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Robert Haas
15 years ago