Beispiel #1
0
/*
 * Postmaster subroutine to start a syslogger subprocess.
 */
int
SysLogger_Start(void)
{
	pid_t		sysloggerPid;
	char	   *filename;

	if (!Redirect_stderr)
		return 0;

	/*
	 * If first time through, create the pipe which will receive stderr
	 * output.
	 *
	 * If the syslogger crashes and needs to be restarted, we continue to use
	 * the same pipe (indeed must do so, since extant backends will be
	 * writing into that pipe).
	 *
	 * This means the postmaster must continue to hold the read end of the
	 * pipe open, so we can pass it down to the reincarnated syslogger.
	 * This is a bit klugy but we have little choice.
	 */
#ifndef WIN32
	if (syslogPipe[0] < 0)
	{
		if (pgpipe(syslogPipe) < 0)
			ereport(FATAL,
					(errcode_for_socket_access(),
				  (errmsg("could not create pipe for syslog: %m"))));
	}
#else
	if (!syslogPipe[0])
	{
		SECURITY_ATTRIBUTES sa;

		memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES));
		sa.nLength = sizeof(SECURITY_ATTRIBUTES);
		sa.bInheritHandle = TRUE;

		if (!CreatePipe(&syslogPipe[0], &syslogPipe[1], &sa, 32768))
			ereport(FATAL,
					(errcode_for_file_access(),
				  (errmsg("could not create pipe for syslog: %m"))));
	}
#endif

	/*
	 * create log directory if not present; ignore errors
	 */
	if (is_absolute_path(Log_directory))
		mkdir(Log_directory, 0700);
	else
	{
		filename = palloc(MAXPGPATH);
		snprintf(filename, MAXPGPATH, "%s/%s", DataDir, Log_directory);
		mkdir(filename, 0700);
		pfree(filename);
	}

	/*
	 * The initial logfile is created right in the postmaster, to verify
	 * that the Log_directory is writable.
	 */
	filename = logfile_getname(time(NULL));

	syslogFile = fopen(filename, "a");

	if (!syslogFile)
		ereport(FATAL,
				(errcode_for_file_access(),
				 (errmsg("could not create log file \"%s\": %m",
						 filename))));

	setvbuf(syslogFile, NULL, LBF_MODE, 0);

	pfree(filename);

	/*
	 * Now we can fork off the syslogger subprocess.
	 */
	fflush(stdout);
	fflush(stderr);

#ifdef __BEOS__
	/* Specific beos actions before backend startup */
	beos_before_backend_startup();
#endif

#ifdef EXEC_BACKEND
	switch ((sysloggerPid = syslogger_forkexec()))
#else
	switch ((sysloggerPid = fork()))
#endif
	{
		case -1:
#ifdef __BEOS__
			/* Specific beos actions */
			beos_backend_startup_failed();
#endif
			ereport(LOG,
					(errmsg("could not fork system logger: %m")));
			return 0;

#ifndef EXEC_BACKEND
		case 0:
			/* in postmaster child ... */
#ifdef __BEOS__
			/* Specific beos actions after backend startup */
			beos_backend_startup();
#endif
			/* Close the postmaster's sockets */
			ClosePostmasterPorts(true);

			/* Drop our connection to postmaster's shared memory, as well */
			PGSharedMemoryDetach();

			/* do the work */
			SysLoggerMain(0, NULL);
			break;
#endif

		default:
			/* success, in postmaster */

			/* now we redirect stderr, if not done already */
			if (!redirection_done)
			{
#ifndef WIN32
				fflush(stdout);
				if (dup2(syslogPipe[1], fileno(stdout)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stdout: %m")));
				fflush(stderr);
				if (dup2(syslogPipe[1], fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				/* Now we are done with the write end of the pipe. */
				close(syslogPipe[1]);
				syslogPipe[1] = -1;
#else
				int			fd;

				fflush(stderr);
				fd = _open_osfhandle((long) syslogPipe[1],
									 _O_APPEND | _O_TEXT);
				if (dup2(fd, _fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				close(fd);
				/* Now we are done with the write end of the pipe. */
				CloseHandle(syslogPipe[1]);
				syslogPipe[1] = 0;
#endif
				redirection_done = true;
			}

			/* postmaster will never write the file; close it */
			fclose(syslogFile);
			syslogFile = NULL;
			return (int) sysloggerPid;
	}

	/* we should never reach here */
	return 0;
}
Beispiel #2
0
/*
 * Postmaster subroutine to start a syslogger subprocess.
 */
int
SysLogger_Start(void)
{
	pid_t		sysloggerPid;
	char	   *filename;

	if (!Logging_collector)
		return 0;

	/*
	 * If first time through, create the pipe which will receive stderr
	 * output.
	 *
	 * If the syslogger crashes and needs to be restarted, we continue to use
	 * the same pipe (indeed must do so, since extant backends will be writing
	 * into that pipe).
	 *
	 * This means the postmaster must continue to hold the read end of the
	 * pipe open, so we can pass it down to the reincarnated syslogger. This
	 * is a bit klugy but we have little choice.
	 */
#ifndef WIN32
	if (syslogPipe[0] < 0)
	{
		if (pipe(syslogPipe) < 0)
			ereport(FATAL,
					(errcode_for_socket_access(),
					 (errmsg("could not create pipe for syslog: %m"))));
	}
#else
	if (!syslogPipe[0])
	{
		SECURITY_ATTRIBUTES sa;

		memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES));
		sa.nLength = sizeof(SECURITY_ATTRIBUTES);
		sa.bInheritHandle = TRUE;

		if (!CreatePipe(&syslogPipe[0], &syslogPipe[1], &sa, 32768))
			ereport(FATAL,
					(errcode_for_file_access(),
					 (errmsg("could not create pipe for syslog: %m"))));
	}
#endif

	/*
	 * Create log directory if not present; ignore errors
	 */
	mkdir(Log_directory, S_IRWXU);

	/*
	 * The initial logfile is created right in the postmaster, to verify that
	 * the Log_directory is writable.  We save the reference time so that the
	 * syslogger child process can recompute this file name.
	 *
	 * It might look a bit strange to re-do this during a syslogger restart,
	 * but we must do so since the postmaster closed syslogFile after the
	 * previous fork (and remembering that old file wouldn't be right anyway).
	 * Note we always append here, we won't overwrite any existing file.  This
	 * is consistent with the normal rules, because by definition this is not
	 * a time-based rotation.
	 */
	first_syslogger_file_time = time(NULL);
	filename = logfile_getname(first_syslogger_file_time, NULL);

	syslogFile = logfile_open(filename, "a", false);

	pfree(filename);

#ifdef EXEC_BACKEND
	switch ((sysloggerPid = syslogger_forkexec()))
#else
	switch ((sysloggerPid = fork_process()))
#endif
	{
		case -1:
			ereport(LOG,
					(errmsg("could not fork system logger: %m")));
			return 0;

#ifndef EXEC_BACKEND
		case 0:
			/* in postmaster child ... */
			/* Close the postmaster's sockets */
			ClosePostmasterPorts(true);

			/* Lose the postmaster's on-exit routines */
			on_exit_reset();

			/* Drop our connection to postmaster's shared memory, as well */
			PGSharedMemoryDetach();

			/* do the work */
			SysLoggerMain(0, NULL);
			break;
#endif

		default:
			/* success, in postmaster */

			/* now we redirect stderr, if not done already */
			if (!redirection_done)
			{
#ifndef WIN32
				fflush(stdout);
				if (dup2(syslogPipe[1], fileno(stdout)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stdout: %m")));
				fflush(stderr);
				if (dup2(syslogPipe[1], fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				/* Now we are done with the write end of the pipe. */
				close(syslogPipe[1]);
				syslogPipe[1] = -1;
#else
				int			fd;

				/*
				 * open the pipe in binary mode and make sure stderr is binary
				 * after it's been dup'ed into, to avoid disturbing the pipe
				 * chunking protocol.
				 */
				fflush(stderr);
				fd = _open_osfhandle((intptr_t) syslogPipe[1],
									 _O_APPEND | _O_BINARY);
				if (dup2(fd, _fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				close(fd);
				_setmode(_fileno(stderr), _O_BINARY);

				/*
				 * Now we are done with the write end of the pipe.
				 * CloseHandle() must not be called because the preceding
				 * close() closes the underlying handle.
				 */
				syslogPipe[1] = 0;
#endif
				redirection_done = true;
			}

			/* postmaster will never write the file; close it */
			fclose(syslogFile);
			syslogFile = NULL;
			return (int) sysloggerPid;
	}

	/* we should never reach here */
	return 0;
}
/*
 * Postmaster subroutine to start a syslogger subprocess.
 */
int
SysLogger_Start(void)
{
	pid_t		sysloggerPid;
	char	   *filename;

	if (!Redirect_stderr)
		return 0;

	/*
	 * If first time through, create the pipe which will receive stderr
	 * output.
	 *
	 * If the syslogger crashes and needs to be restarted, we continue to use
	 * the same pipe (indeed must do so, since extant backends will be writing
	 * into that pipe).
	 *
	 * This means the postmaster must continue to hold the read end of the
	 * pipe open, so we can pass it down to the reincarnated syslogger. This
	 * is a bit klugy but we have little choice.
	 */
#ifndef WIN32
	if (syslogPipe[0] < 0)
	{
		if (pgpipe(syslogPipe) < 0)
			ereport(FATAL,
					(errcode_for_socket_access(),
					 (errmsg("could not create pipe for syslog: %m"))));
	}
#else
	if (!syslogPipe[0])
	{
		SECURITY_ATTRIBUTES sa;

		memset(&sa, 0, sizeof(SECURITY_ATTRIBUTES));
		sa.nLength = sizeof(SECURITY_ATTRIBUTES);
		sa.bInheritHandle = TRUE;

		if (!CreatePipe(&syslogPipe[0], &syslogPipe[1], &sa, 32768))
			ereport(FATAL,
					(errcode_for_file_access(),
					 (errmsg("could not create pipe for syslog: %m"))));
	}
#endif

	/*
	 * Create log directory if not present; ignore errors
	 */
	mkdir(Log_directory, 0700);

	/*
	 * The initial logfile is created right in the postmaster, to verify that
	 * the Log_directory is writable.
	 */
	filename = logfile_getname(time(NULL));

	syslogFile = fopen(filename, "a");

	if (!syslogFile)
		ereport(FATAL,
				(errcode_for_file_access(),
				 (errmsg("could not create log file \"%s\": %m",
						 filename))));

	setvbuf(syslogFile, NULL, LBF_MODE, 0);

	pfree(filename);

#ifdef EXEC_BACKEND
	switch ((sysloggerPid = syslogger_forkexec()))
#else
	switch ((sysloggerPid = fork_process()))
#endif
	{
		case -1:
			ereport(LOG,
					(errmsg("could not fork system logger: %m")));
			return 0;

#ifndef EXEC_BACKEND
		case 0:
			/* in postmaster child ... */
			/* Close the postmaster's sockets */
			ClosePostmasterPorts(true);

			/* Lose the postmaster's on-exit routines */
			on_exit_reset();

			/* Drop our connection to postmaster's shared memory, as well */
			PGSharedMemoryDetach();

			/* do the work */
			SysLoggerMain(0, NULL);
			break;
#endif

		default:
			/* success, in postmaster */

			/* now we redirect stderr, if not done already */
			if (!redirection_done)
			{
#ifndef WIN32
				fflush(stdout);
				if (dup2(syslogPipe[1], fileno(stdout)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stdout: %m")));
				fflush(stderr);
				if (dup2(syslogPipe[1], fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				/* Now we are done with the write end of the pipe. */
				close(syslogPipe[1]);
				syslogPipe[1] = -1;
#else
				int			fd;

				/*
				 * open the pipe in binary mode and make sure
				 * stderr is binary after it's been dup'ed into, to avoid
				 * disturbing the pipe chunking protocol.
				 */
				fflush(stderr);
				fd = _open_osfhandle((long) syslogPipe[1],
									 _O_APPEND | _O_BINARY);
				if (dup2(fd, _fileno(stderr)) < 0)
					ereport(FATAL,
							(errcode_for_file_access(),
							 errmsg("could not redirect stderr: %m")));
				close(fd);
				_setmode(_fileno(stderr),_O_BINARY);
				/* Now we are done with the write end of the pipe. */
				CloseHandle(syslogPipe[1]);
				syslogPipe[1] = 0;
#endif
				redirection_done = true;
			}

			/* postmaster will never write the file; close it */
			fclose(syslogFile);
			syslogFile = NULL;
			return (int) sysloggerPid;
	}

	/* we should never reach here */
	return 0;
}