/*-------------------------------------------------------------------------
 *
 * main.c
 *	  Stub main() routine for the postgres backend.
 *
 * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *	  $Header: /cvsroot/pgsql/src/backend/main/main.c,v 1.33 2000/10/21 22:36:11 petere Exp $
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include <pwd.h>
#include <unistd.h>

#if defined(__alpha) && !defined(linux)
#include <sys/sysinfo.h>
#include "machine/hal_sysinfo.h"
#define ASSEMBLER
#include <sys/proc.h>
#undef ASSEMBLER
#endif

#ifdef USE_LOCALE
#include <locale.h>
#endif
#include "miscadmin.h"
#include "bootstrap/bootstrap.h"
#include "tcop/tcopprot.h"

#define NOROOTEXEC "\
\n\"root\" execution of the PostgreSQL backend is not permitted.\n\n\
The backend must be started under its own userid to prevent\n\
a possible system security compromise. See the INSTALL file for\n\
more information on how to properly start the postmaster.\n\n"

int
main(int argc, char *argv[])
{
	int			len;

#if defined(__alpha)
#ifdef NOFIXADE
	int			buffer[] = {SSIN_UACPROC, UAC_SIGBUS};

#endif	 /* NOFIXADE */
#ifdef NOPRINTADE
	int			buffer[] = {SSIN_UACPROC, UAC_NOPRINT};

#endif	 /* NOPRINTADE */
#endif

#ifdef USE_LOCALE
	setlocale(LC_CTYPE, "");	/* take locale information from an
								 * environment */
	setlocale(LC_COLLATE, "");
	setlocale(LC_MONETARY, "");
#endif
#if defined(NOFIXADE) || defined(NOPRINTADE)

	/*
	 * Must be first so that the bootstrap code calls it, too. (Only
	 * needed on some RISC architectures.)
	 */

#if defined(ultrix4)
	syscall(SYS_sysmips, MIPS_FIXADE, 0, NULL, NULL, NULL);
#endif

#if defined(__alpha)
	if (setsysinfo(SSI_NVPAIRS, buffer, 1, (caddr_t) NULL,
				   (unsigned long) NULL) < 0)
		elog(NOTICE, "setsysinfo failed: %d\n", errno);
#endif

#endif	 /* NOFIXADE || NOPRINTADE */

	/*
	 * use one executable for both postgres and postmaster, invoke one or
	 * the other depending on the name of the executable
	 */
	len = strlen(argv[0]);

/* OK this is going to seem weird, but BeOS is presently basically
 * a single user system.  There is work going on, but at present it'll
 * say that every user is uid 0, i.e. root.  We'll inhibit this check
 * until Be get the system working with multiple users!!
 */
#ifndef __BEOS__
if (!geteuid())
	{
		fprintf(stderr, "%s", NOROOTEXEC);
		exit(1);
	}
#endif /* __BEOS__ */

#ifdef __BEOS__
 	/* Specific beos actions on startup */
 	beos_startup(argc,argv);
#endif


	if (len >= 10 && !strcmp(argv[0] + len - 10, "postmaster"))
		exit(PostmasterMain(argc, argv));

	/*
	 * if the first argument is "-boot", then invoke the backend in
	 * bootstrap mode
	 */
	if (argc > 1 && strcmp(argv[1], "-boot") == 0)
		exit(BootstrapMain(argc - 1, argv + 1));		/* remove the -boot arg
														 * from the command line */
	else
	{
		struct passwd *pw;

		pw = getpwuid(geteuid());
		if (!pw)
		{
			fprintf(stderr, "%s: invalid current euid", argv[0]);
			exit(1);
		}
		exit(PostgresMain(argc, argv, argc, argv, pw->pw_name));
	}
}
