/* $TOG: utils.c /main/128 1997/06/01 13:50:39 sekhar $ */
/*

Copyright (c) 1987  X Consortium

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the X Consortium.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
Copyright 1994 Quarterdeck Office Systems.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital and
Quarterdeck not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

DIGITAL AND QUARTERDECK DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE
OR PERFORMANCE OF THIS SOFTWARE.

*/
/* $XFree86: xc/programs/Xserver/os/utils.c,v 3.27.2.13 1999/07/29 09:23:02 hohndel Exp $ */

#ifdef WIN32
#include <X11/Xwinsock.h>
#endif
#include "Xos.h"
#include <stdio.h>
#include "misc.h"
#include "X.h"
#include "input.h"
#include "opaque.h"
#ifdef X_POSIX_C_SOURCE
#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
#include <signal.h>
#undef _POSIX_C_SOURCE
#else
#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
#include <signal.h>
#else
#define _POSIX_SOURCE
#include <signal.h>
#undef _POSIX_SOURCE
#endif
#endif
#if !defined(SYSV) && !defined(AMOEBA) && !defined(_MINIX) && !defined(WIN32) && !defined(Lynx) && !defined(__QNX__)
#include <sys/resource.h>
#endif
#include <time.h>
#include <sys/stat.h>
#include <ctype.h>    /* for isspace */
#if NeedVarargsPrototypes
#include <stdarg.h>
#endif

#if defined(DGUX)
#include <sys/resource.h>
#include <netdb.h>
#include <unistd.h>
#endif

#ifdef AMOEBA
#include "osdep.h"
#include <amoeba.h>
#include <module/mutex.h>

static mutex print_lock;
#endif

#if defined(__STDC__) || defined(AMOEBA)
/* DHD: SVR4.0 has a prototype for abs() in stdlib.h */
/* DHD: might be better to move this include higher up? */
#ifdef abs
#undef abs
#endif
#ifndef NOSTDHDRS
#include <stdlib.h>	/* for malloc() */
#endif
#endif

extern char *display;

extern CARD32 defaultScreenSaverTime;	/* for parsing command line */
extern CARD32 defaultScreenSaverInterval;
extern int defaultScreenSaverBlanking;
extern int defaultBackingStore;
extern Bool disableBackingStore;
extern Bool disableSaveUnders;
extern Bool PartialNetwork;
#ifndef NOLOGOHACK
extern int logoScreenSaver;
#endif
#ifdef RLIMIT_DATA
extern int limitDataSpace;
#endif
#ifdef RLIMIT_STACK
extern int limitStackSpace;
#endif
#ifdef RLIMIT_NOFILE
extern int limitNoFile;
#endif
extern int defaultColorVisualClass;
extern Bool permitOldBugs;
extern int monitorResolution;
extern Bool defeatAccessControl;
#ifdef SERVER_LOCK
static Bool nolock = FALSE;
#endif

extern char* protNoListen;

Bool CoreDump;
Bool noTestExtensions;

int auditTrailLevel = 1;

void ddxUseMsg();
#if NeedVarargsPrototypes
void VErrorF(char*, va_list);
#endif

#ifdef AIXV3
FILE *aixfd;
int SyncOn  = 0;
extern int SelectWaitTime;
#endif

#ifdef DEBUG
#ifndef SPECIAL_MALLOC
#define MEMBUG
#endif
#endif

#ifdef MEMBUG
#define MEM_FAIL_SCALE 100000
long Memory_fail = 0;
#ifdef linux
#include <stdlib.h>  /* for random() */
#endif
#endif

#ifdef sgi
int userdefinedfontpath = 0;
#endif /* sgi */

Bool Must_have_memory = FALSE;

char *dev_tty_from_init = NULL;		/* since we need to parse it anyway */

OsSigHandlerPtr
OsSignal(sig, handler)
    int sig;
    OsSigHandlerPtr handler;
{
#ifdef X_NOT_POSIX
    return signal(sig, handler);
#else
    struct sigaction act, oact;

    sigemptyset(&act.sa_mask);
    if (handler != SIG_IGN)
	sigaddset(&act.sa_mask, sig);
    act.sa_flags = 0;
    act.sa_handler = handler;
    sigaction(sig, &act, &oact);
    return oact.sa_handler;
#endif
}

#include <errno.h>
extern int errno;

#ifdef SERVER_LOCK
/*
 * Explicit support for a server lock file like the ones used for UUCP.
 * For architectures with virtual terminals that can run more than one
 * server at a time.  This keeps the servers from stomping on each other
 * if the user forgets to give them different display numbers.
 */
#ifndef __EMX__
#define LOCK_DIR "/tmp"
#define LOCK_TMP_PREFIX "/.tX"
#define LOCK_PREFIX "/.X"
#define LOCK_SUFFIX "-lock"
#else
#define LOCK_TMP_PREFIX "/xf86$"
#define LOCK_PREFIX "/xf86_"
#define LOCK_SUFFIX ".lck"
#endif

#if defined(DGUX)
#include <limits.h>
#include <sys/param.h>
#endif

#ifdef _MINIX
#include <limits.h>	/* For PATH_MAX */
#endif

#ifdef __EMX__
#define link rename
#endif

#ifndef PATH_MAX
#ifndef Lynx
#include <sys/param.h>
#else
#include <param.h>
#endif
#ifndef PATH_MAX
#ifdef MAXPATHLEN
#define PATH_MAX MAXPATHLEN
#else
#define PATH_MAX 1024
#endif
#endif
#endif

static Bool StillLocking = FALSE;
static char LockFile[PATH_MAX];

/*
 * LockServer --
 *      Check if the server lock file exists.  If so, check if the PID
 *      contained inside is valid.  If so, then die.  Otherwise, create
 *      the lock file containing the PID.
 */
void
LockServer()
{
#ifndef AMOEBA
  char tmp[PATH_MAX], pid_str[12];
  int lfd, i, haslock, l_pid, t;
  char *tmppath = NULL;
  int len;
#if defined(__QNX__) && !defined(__QNXNTO__)
  char nodeid[8];
  sprintf(nodeid, ".%d", getnid());
#endif

  if (nolock) return;
  /*
   * Path names
   */
#ifndef __EMX__
  tmppath = LOCK_DIR;
#else
  /* OS/2 uses TMP directory, must also prepare for 8.3 names */
  tmppath = getenv("TMP");
  if (!tmppath)
    FatalError("No TMP dir found\n");
#endif

  len = strlen(LOCK_PREFIX) > strlen(LOCK_TMP_PREFIX) ? strlen(LOCK_PREFIX) :
						strlen(LOCK_TMP_PREFIX);
#if !(defined(__QNX__) && !defined(__QNXNTO__))
  len += strlen(tmppath) + strlen(display) + strlen(LOCK_SUFFIX) + 1;
#else
  len += strlen(tmppath) + strlen(display) + strlen(LOCK_SUFFIX) + strlen(nodeid) + 1;
#endif
  if (len > sizeof(LockFile))
    FatalError("Display name `%s' is too long\n");
#if !(defined(__QNX__) && !defined(__QNXNTO__))
  (void)sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX, tmppath, display);
  (void)sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX, tmppath, display);
#else
  (void)sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX "%s", 
	tmppath, display, nodeid);
  (void)sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX "%s", 
	tmppath, display, nodeid);
#endif
  /*
   * Create a temporary file containing our PID.  Attempt three times
   * to create the file.
   */
  StillLocking = TRUE;
  i = 0;
  do {
    i++;
    lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644);
    if (lfd < 0)
       sleep(2);
    else
       break;
  } while (i < 3);
  if (lfd < 0) {
    unlink(tmp);
    i = 0;
    do {
      i++;
      lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644);
      if (lfd < 0)
         sleep(2);
      else
         break;
    } while (i < 3);
  }
  if (lfd < 0)
    FatalError("Could not create lock file in %s\n", tmp);
  (void) sprintf(pid_str, "%10d\n", getpid());
  (void) write(lfd, pid_str, 11);
#ifndef __EMX__
#ifndef USE_CHMOD
  (void) fchmod(lfd, 0444);
#else
  (void) chmod(tmp, 0444);
#endif
#endif
  (void) close(lfd);

  /*
   * OK.  Now the tmp file exists.  Try three times to move it in place
   * for the lock.
   */
  i = 0;
  haslock = 0;
  while ((!haslock) && (i++ < 3)) {
    haslock = (link(tmp,LockFile) == 0);
    if (haslock) {
      /*
       * We're done.
       */
      break;
    }
    else {
      /*
       * Read the pid from the existing file
       */
      lfd = open(LockFile, O_RDONLY);
      if (lfd < 0) {
        unlink(tmp);
        FatalError("Can't read lock file %s\n", LockFile);
      }
      pid_str[0] = '\0';
      if (read(lfd, pid_str, 11) != 11) {
        /*
         * Bogus lock file.
         */
        unlink(LockFile);
        close(lfd);
        continue;
      }
      pid_str[11] = '\0';
      sscanf(pid_str, "%d", &l_pid);
      close(lfd);

      /*
       * Now try to kill the PID to see if it exists.
       */
      errno = 0;
      t = kill(l_pid, 0);
      if ((t< 0) && (errno == ESRCH)) {
        /*
         * Stale lock file.
         */
        unlink(LockFile);
        continue;
      }
      else if (((t < 0) && (errno == EPERM)) || (t == 0)) {
        /*
         * Process is still active.
         */
        unlink(tmp);
	FatalError("Server is already active for display %s\n%s %s\n%s\n",
		   display, "\tIf this server is no longer running, remove",
		   LockFile, "\tand start again.");
      }
    }
  }
  unlink(tmp);
  if (!haslock)
    FatalError("Could not create server lock file: %s\n", LockFile);
  StillLocking = FALSE;
#endif /* !AMOEBA */
}

/*
 * UnlockServer --
 *      Remove the server lock file.
 */
void
UnlockServer()
{
#ifndef AMOEBA
  if (nolock) return;

  if (!StillLocking){

#ifdef __EMX__
  (void) chmod(LockFile,S_IREAD|S_IWRITE);
#endif /* __EMX__ */
  (void) unlink(LockFile);
  }
#endif

}
#endif /* SERVER_LOCK */

/* Force connections to close on SIGHUP from init */

/*ARGSUSED*/
SIGVAL
AutoResetServer (sig)
    int sig;
{
    dispatchException |= DE_RESET;
    isItTimeToYield = TRUE;
#ifdef GPROF
    chdir ("/tmp");
    exit (0);
#endif
#if defined(SYSV) && defined(X_NOT_POSIX)
    OsSignal (SIGHUP, AutoResetServer);
#endif
#ifdef AMOEBA
    WakeUpMainThread();
#endif
}

/* Force connections to close and then exit on SIGTERM, SIGINT */

/*ARGSUSED*/
SIGVAL
GiveUp(sig)
    int sig;
{
    dispatchException |= DE_TERMINATE;
    isItTimeToYield = TRUE;
#if defined(SYSV) && defined(X_NOT_POSIX)
    if (sig)
	OsSignal(sig, SIG_IGN);
#endif
#ifdef AMOEBA
    WakeUpMainThread();
#endif
}

#if __GNUC__
static void AbortServer() __attribute__((noreturn));
#endif

static void
AbortServer()
{
    extern void AbortDDX();

    OsCleanup();
    AbortDDX();
    fflush(stderr);
#ifdef AMOEBA
    IOPCleanUp();
#endif
    if (CoreDump)
	abort();
    exit (1);
}

void
Error(str)
    char *str;
{
#ifdef AMOEBA
    mu_lock(&print_lock);
#endif
    perror(str);
#ifdef AMOEBA
    mu_unlock(&print_lock);
#endif
}

#ifndef DDXTIME
CARD32
GetTimeInMillis()
{
#ifndef AMOEBA
    struct timeval  tp;

    X_GETTIMEOFDAY(&tp);
    return(tp.tv_sec * 1000) + (tp.tv_usec / 1000);
#else
    return sys_milli();
#endif
}
#endif

AdjustWaitForDelay (waitTime, newdelay)
    pointer	    waitTime;
    unsigned long   newdelay;
{
    static struct timeval   delay_val;
    struct timeval	    **wt = (struct timeval **) waitTime;
    unsigned long	    olddelay;

    if (*wt == NULL)
    {
	delay_val.tv_sec = newdelay / 1000;
	delay_val.tv_usec = 1000 * (newdelay % 1000);
	*wt = &delay_val;
    }
    else
    {
	olddelay = (*wt)->tv_sec * 1000 + (*wt)->tv_usec / 1000;
	if (newdelay < olddelay)
	{
	    (*wt)->tv_sec = newdelay / 1000;
	    (*wt)->tv_usec = 1000 * (newdelay % 1000);
	}
    }
}

void UseMsg()
{
#if !defined(AIXrt) && !defined(AIX386)
#ifndef AMOEBA
    ErrorF("use: X [:<display>] [option]\n");
#else
    ErrorF("use: X [[<host>]:<display>] [option]\n");
#endif
    ErrorF("-a #                   mouse acceleration (pixels)\n");
    ErrorF("-ac                    disable access control restrictions\n");
#ifdef MEMBUG
    ErrorF("-alloc int             chance alloc should fail\n");
#endif
    ErrorF("-audit int             set audit trail level\n");	
    ErrorF("-auth file             select authorization file\n");	
    ErrorF("bc                     enable bug compatibility\n");
    ErrorF("-bs                    disable any backing store support\n");
    ErrorF("-c                     turns off key-click\n");
    ErrorF("c #                    key-click volume (0-100)\n");
    ErrorF("-cc int                default color visual class\n");
    ErrorF("-co file               color database file\n");
#if 0
    ErrorF("-config file           read options from file\n");
#endif
    ErrorF("-core                  generate core dump on fatal error\n");
    ErrorF("-dpi int               screen resolution in dots per inch\n");
#ifdef DPMSExtension
    ErrorF("dpms                   enables VESA DPMS monitor control\n");
    ErrorF("-dpms                  disables VESA DPMS monitor control\n");
#endif
    ErrorF("-deferglyphs [none|all|16] defer loading of [no|all|16-bit] glyphs\n");
    ErrorF("-f #                   bell base (0-100)\n");
    ErrorF("-fc string             cursor font\n");
    ErrorF("-fn string             default font name\n");
    ErrorF("-fp string             default font path\n");
    ErrorF("-help                  prints message with these options\n");
    ErrorF("-I                     ignore all remaining arguments\n");
#ifdef RLIMIT_DATA
    ErrorF("-ld int                limit data space to N Kb\n");
#endif
#ifdef RLIMIT_NOFILE
    ErrorF("-lf int                limit number of open files to N\n");
#endif
#ifdef RLIMIT_STACK
    ErrorF("-ls int                limit stack space to N Kb\n");
#endif
#ifdef SERVER_LOCK
    ErrorF("-nolock                disable the locking mechanism\n");
#endif
#ifndef NOLOGOHACK
    ErrorF("-logo                  enable logo in screen saver\n");
    ErrorF("nologo                 disable logo in screen saver\n");
#endif
    ErrorF("-nolisten string       don't listen on protocol\n");
    ErrorF("-p #                   screen-saver pattern duration (minutes)\n");
    ErrorF("-pn                    accept failure to listen on all ports\n");
    ErrorF("-nopn                  reject failure to listen on all ports\n");
    ErrorF("-r                     turns off auto-repeat\n");
    ErrorF("r                      turns on auto-repeat \n");
    ErrorF("-s #                   screen-saver timeout (minutes)\n");
#ifdef XCSECURITY
    ErrorF("-sp file               security policy file\n");
#endif
    ErrorF("-su                    disable any save under support\n");
    ErrorF("-t #                   mouse threshold (pixels)\n");
    ErrorF("-terminate             terminate at server reset\n");
    ErrorF("-to #                  connection time out\n");
    ErrorF("-tst                   disable testing extensions\n");
    ErrorF("ttyxx                  server started from init on /dev/ttyxx\n");
    ErrorF("v                      video blanking for screen-saver\n");
    ErrorF("-v                     screen-saver without video blanking\n");
    ErrorF("-wm                    WhenMapped default backing-store\n");
    ErrorF("-x string              loads named extension at init time \n");
#ifdef AMOEBA
    ErrorF("-tcp capability        specify TCP/IP server capability\n");
#endif
#ifdef XDMCP
    XdmcpUseMsg();
#endif
#endif /* !AIXrt && ! AIX386 */
#ifdef XKB
    XkbUseMsg();
#endif
    ddxUseMsg();
}

/*  This function performs a rudimentary sanity check
 *  on the display name passed in on the command-line,
 *  since this string is used to generate filenames.
 *  It is especially important that the display name
 *  not contain a "/" and not start with a "-".
 *                                            --kvajk
 */
int VerifyDisplayName( d )
char *d;
{
    if ( d == (char *)0 ) return( 0 );  /*  null  */
    if ( *d == '\0' ) return( 0 );  /*  empty  */
    if ( *d == '-' ) return( 0 );  /*  could be confused for an option  */
    if ( *d == '.' ) return( 0 );  /*  must not equal "." or ".."  */
    if ( strchr(d, '/') != (char *)0 ) return( 0 );  /*  very important!!!  */
    return( 1 );
}

/*
 * This function parses the command line. Handles device-independent fields
 * and allows ddx to handle additional fields.  It is not allowed to modify
 * argc or any of the strings pointed to by argv.
 */
void
ProcessCommandLine ( argc, argv )
int	argc;
char	*argv[];

{
    int i, skip;

#ifdef AMOEBA
    mu_init(&print_lock);
#endif

    defaultKeyboardControl.autoRepeat = TRUE;

#ifdef PART_NET
	PartialNetwork = TRUE;
#endif

#ifdef AIXV3
    OpenDebug();
#endif
    for ( i = 1; i < argc; i++ )
    {
	/* call ddx first, so it can peek/override if it wants */
        if(skip = ddxProcessArgument(argc, argv, i))
	{
	    i += (skip - 1);
	}
	else if(argv[i][0] ==  ':')  
	{
	    /* initialize display */
	    display = argv[i];
	    display++;
            if( ! VerifyDisplayName( display ) ) {
                ErrorF("Bad display name: %s\n", display);
                UseMsg();
                exit(1);
            }
	}
#ifdef AMOEBA
        else if (strchr(argv[i], ':') != NULL) {
            char *p;

            XServerHostName = argv[i];
            if ((p = strchr(argv[i], ':')) != NULL) {
                *p++ = '\0';
                display = p;
                if( ! VerifyDisplayName( display ) ) {
                    ErrorF("Bad display name: %s\n", display);
                    UseMsg();
                    exit(1);
                }
            }
        } else if (strcmp( argv[i], "-tcp") == 0) {
            if (++i < argc)
                XTcpServerName = argv[i];
            else
                UseMsg();
        }
#endif /* AMOEBA */
	else if ( strcmp( argv[i], "-a") == 0)
	{
	    if(++i < argc)
	        defaultPointerControl.num = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-ac") == 0)
	{
	    defeatAccessControl = TRUE;
	}
#ifdef MEMBUG
	else if ( strcmp( argv[i], "-alloc") == 0)
	{
	    if(++i < argc)
	        Memory_fail = atoi(argv[i]);
	    else
		UseMsg();
	}
#endif
	else if ( strcmp( argv[i], "-audit") == 0)
	{
	    if(++i < argc)
	        auditTrailLevel = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-auth") == 0)
	{
	    if(++i < argc)
	        InitAuthorization (argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "bc") == 0)
	    permitOldBugs = TRUE;
	else if ( strcmp( argv[i], "-bs") == 0)
	    disableBackingStore = TRUE;
	else if ( strcmp( argv[i], "c") == 0)
	{
	    if(++i < argc)
	        defaultKeyboardControl.click = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-c") == 0)
	{
	    defaultKeyboardControl.click = 0;
	}
	else if ( strcmp( argv[i], "-cc") == 0)
	{
	    if(++i < argc)
	        defaultColorVisualClass = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-co") == 0)
	{
	    if(++i < argc)
	        rgbPath = argv[i];
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-core") == 0)
	    CoreDump = TRUE;
	else if ( strcmp( argv[i], "-dpi") == 0)
	{
	    if(++i < argc)
	        monitorResolution = atoi(argv[i]);
	    else
		UseMsg();
	}
#ifdef DPMSExtension
	else if ( strcmp( argv[i], "dpms") == 0)
	    DPMSEnabledSwitch = TRUE;
	else if ( strcmp( argv[i], "-dpms") == 0)
	    DPMSDisabledSwitch = TRUE;
#endif
	else if ( strcmp( argv[i], "-deferglyphs") == 0)
	{
	    if(++i >= argc || !ParseGlyphCachingMode(argv[i]))
		UseMsg();
	}
	else if ( strcmp( argv[i], "-f") == 0)
	{
	    if(++i < argc)
	        defaultKeyboardControl.bell = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-fc") == 0)
	{
	    if(++i < argc)
	        defaultCursorFont = argv[i];
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-fn") == 0)
	{
	    if(++i < argc)
	        defaultTextFont = argv[i];
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-fp") == 0)
	{
	    if(++i < argc)
	    {
#ifdef sgi
		userdefinedfontpath = 1;
#endif /* sgi */
	        defaultFontPath = argv[i];
	    }
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-help") == 0)
	{
	    UseMsg();
	    exit(0);
	}
#ifdef XKB
        else if ( (skip=XkbProcessArguments(argc,argv,i))!=0 ) {
	    if (skip>0)
		 i+= skip-1;
	    else UseMsg();
	}
#endif
#ifdef RLIMIT_DATA
	else if ( strcmp( argv[i], "-ld") == 0)
	{
	    if(++i < argc)
	    {
	        limitDataSpace = atoi(argv[i]);
		if (limitDataSpace > 0)
		    limitDataSpace *= 1024;
	    }
	    else
		UseMsg();
	}
#endif
#ifdef RLIMIT_NOFILE
	else if ( strcmp( argv[i], "-lf") == 0)
	{
	    if(++i < argc)
	        limitNoFile = atoi(argv[i]);
	    else
		UseMsg();
	}
#endif
#ifdef RLIMIT_STACK
	else if ( strcmp( argv[i], "-ls") == 0)
	{
	    if(++i < argc)
	    {
	        limitStackSpace = atoi(argv[i]);
		if (limitStackSpace > 0)
		    limitStackSpace *= 1024;
	    }
	    else
		UseMsg();
	}
#endif
#ifdef SERVER_LOCK
	else if ( strcmp ( argv[i], "-nolock") == 0)
	{
#if !defined(WIN32) && !defined(__EMX__)
	  if (getuid() != 0)
	    ErrorF("Warning: the -nolock option can only be used by root\n");
	  else
#endif
	    nolock = TRUE;
	}
#endif
#ifndef NOLOGOHACK
	else if ( strcmp( argv[i], "-logo") == 0)
	{
	    logoScreenSaver = 1;
	}
	else if ( strcmp( argv[i], "nologo") == 0)
	{
	    logoScreenSaver = 0;
	}
#endif
	else if ( strcmp( argv[i], "-nolisten") == 0)
	{
            if(++i < argc)
	        protNoListen = argv[i];
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-p") == 0)
	{
	    if(++i < argc)
	        defaultScreenSaverInterval = ((CARD32)atoi(argv[i])) *
					     MILLI_PER_MIN;
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-pn") == 0)
	    PartialNetwork = TRUE;
	else if ( strcmp( argv[i], "-nopn") == 0)
	    PartialNetwork = FALSE;
	else if ( strcmp( argv[i], "r") == 0)
	    defaultKeyboardControl.autoRepeat = TRUE;
	else if ( strcmp( argv[i], "-r") == 0)
	    defaultKeyboardControl.autoRepeat = FALSE;
	else if ( strcmp( argv[i], "-s") == 0)
	{
	    if(++i < argc)
	        defaultScreenSaverTime = ((CARD32)atoi(argv[i])) *
					 MILLI_PER_MIN;
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-su") == 0)
	    disableSaveUnders = TRUE;
	else if ( strcmp( argv[i], "-t") == 0)
	{
	    if(++i < argc)
	        defaultPointerControl.threshold = atoi(argv[i]);
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-terminate") == 0)
	{
	    extern Bool terminateAtReset;
	    
	    terminateAtReset = TRUE;
	}
	else if ( strcmp( argv[i], "-to") == 0)
	{
	    if(++i < argc)
		TimeOutValue = ((CARD32)atoi(argv[i])) * MILLI_PER_SECOND;
	    else
		UseMsg();
	}
	else if ( strcmp( argv[i], "-tst") == 0)
	{
	    noTestExtensions = TRUE;
	}
	else if ( strcmp( argv[i], "v") == 0)
	    defaultScreenSaverBlanking = PreferBlanking;
	else if ( strcmp( argv[i], "-v") == 0)
	    defaultScreenSaverBlanking = DontPreferBlanking;
	else if ( strcmp( argv[i], "-wm") == 0)
	    defaultBackingStore = WhenMapped;
	else if ( strcmp( argv[i], "-x") == 0)
	{
	    if(++i >= argc)
		UseMsg();
	    /* For U**x, which doesn't support dynamic loading, there's nothing
	     * to do when we see a -x.  Either the extension is linked in or
	     * it isn't */
	}
	else if ( strcmp( argv[i], "-I") == 0)
	{
	    /* ignore all remaining arguments */
	    break;
	}
	else if (strncmp (argv[i], "tty", 3) == 0)
	{
	    /* just in case any body is interested */
	    dev_tty_from_init = argv[i];
	}
#ifdef XDMCP
	else if ((skip = XdmcpOptions(argc, argv, i)) != i)
	{
	    i = skip - 1;
	}
#endif
#ifdef XPRINT
	else if ((skip = XprintOptions(argc, argv, i)) != i)
	{
	    i = skip - 1;
	}
#endif
#ifdef XCSECURITY
	else if ((skip = XSecurityOptions(argc, argv, i)) != i)
	{
	    i = skip - 1;
	}
#endif
#ifdef AIXV3
        else if ( strcmp( argv[i], "-timeout") == 0)
        {
            if(++i < argc)
                SelectWaitTime = atoi(argv[i]);
            else
                UseMsg();
        }
        else if ( strcmp( argv[i], "-sync") == 0)
        {
            SyncOn++;
        }
#endif
 	else
 	{
	    ErrorF("Unrecognized option: %s\n", argv[i]);
	    UseMsg();
	    exit (1);
        }
    }
}

#if 0
static void
InsertFileIntoCommandLine(resargc, resargv, prefix_argc, prefix_argv,
			  filename, suffix_argc, suffix_argv)
    int *resargc;
    char ***resargv;
    int prefix_argc;
    char **prefix_argv;
    char *filename;
    int suffix_argc;
    char **suffix_argv;
{
    struct stat     st;
    FILE           *f;
    char           *p;
    char           *q;
    int             insert_argc;
    char           *buf;
    int             len;
    int             i;

    f = fopen(filename, "r");
    if (!f)
	FatalError("Can't open option file %s\n", filename);

    fstat(fileno(f), &st);

    buf = (char *) xalloc((unsigned) st.st_size + 1);
    if (!buf)
	FatalError("Out of Memory\n");

    len = fread(buf, 1, (unsigned) st.st_size, f);

    fclose(f);

    if (len < 0)
	FatalError("Error reading option file %s\n", filename);

    buf[len] = '\0';

    p = buf;
    q = buf;
    insert_argc = 0;

    while (*p)
    {
	while (isspace(*p))
	    p++;
	if (!*p)
	    break;
	if (*p == '#')
	{
	    while (*p && *p != '\n')
		p++;
	} else
	{
	    while (*p && !isspace(*p))
		*q++ = *p++;
	    /* Since p and q might still be pointing at the same place, we	 */
	    /* need to step p over the whitespace now before we add the null.	 */
	    if (*p)
		p++;
	    *q++ = '\0';
	    insert_argc++;
	}
    }

    buf = (char *) xrealloc(buf, q - buf);
    if (!buf)
	FatalError("Out of memory reallocing option buf\n");

    *resargc = prefix_argc + insert_argc + suffix_argc;
    *resargv = (char **) xalloc((*resargc + 1) * sizeof(char *));

    memcpy(*resargv, prefix_argv, prefix_argc * sizeof(char *));

    p = buf;
    for (i = 0; i < insert_argc; i++)
    {
	(*resargv)[prefix_argc + i] = p;
	p += strlen(p) + 1;
    }

    memcpy(*resargv + prefix_argc + insert_argc,
	   suffix_argv, suffix_argc * sizeof(char *));

    (*resargv)[*resargc] = NULL;
} /* end InsertFileIntoCommandLine */

void
ExpandCommandLine(pargc, pargv)
    int *pargc;
    char ***pargv;
{
    int i;

    for (i = 1; i < *pargc; i++)
    {
	if ( (0 == strcmp((*pargv)[i], "-config")) && (i < (*pargc - 1)) )
	{
	    InsertFileIntoCommandLine(pargc, pargv,
					  i, *pargv,
					  (*pargv)[i+1], /* filename */
					  *pargc - i - 2, *pargv + i + 2);
	    i--;
	}
    }
} /* end ExpandCommandLine */
#endif

#if defined(TCPCONN) || defined(STREAMSCONN)
#ifndef WIN32
#include <netdb.h>
#endif
#endif

/* Implement a simple-minded font authorization scheme.  The authorization
   name is "hp-hostname-1", the contents are simply the host name. */
int
set_font_authorizations(authorizations, authlen, client)
char **authorizations;
int *authlen;
pointer client;
{
#define AUTHORIZATION_NAME "hp-hostname-1"
#if defined(TCPCONN) || defined(STREAMSCONN)
    static char result[1024];
    static char *p = NULL;

    if (p == NULL)
    {
	char hname[1024], *hnameptr;
	struct hostent *host;
	int len;

	gethostname(hname, 1024);
	host = gethostbyname(hname);
	if (host == NULL)
	    hnameptr = hname;
	else
	    hnameptr = host->h_name;

	p = result;
        *p++ = sizeof(AUTHORIZATION_NAME) >> 8;
        *p++ = sizeof(AUTHORIZATION_NAME) & 0xff;
        *p++ = (len = strlen(hnameptr) + 1) >> 8;
        *p++ = (len & 0xff);

	memmove(p, AUTHORIZATION_NAME, sizeof(AUTHORIZATION_NAME));
	p += sizeof(AUTHORIZATION_NAME);
	memmove(p, hnameptr, len);
	p += len;
    }
    *authlen = p - result;
    *authorizations = result;
    return 1;
#else /* TCPCONN */
    return 0;
#endif /* TCPCONN */
}

/* XALLOC -- X's internal memory allocator.  Why does it return unsigned
 * long * instead of the more common char *?  Well, if you read K&R you'll
 * see they say that alloc must return a pointer "suitable for conversion"
 * to whatever type you really want.  In a full-blown generic allocator
 * there's no way to solve the alignment problems without potentially
 * wasting lots of space.  But we have a more limited problem. We know
 * we're only ever returning pointers to structures which will have to
 * be long word aligned.  So we are making a stronger guarantee.  It might
 * have made sense to make Xalloc return char * to conform with people's
 * expectations of malloc, but this makes lint happier.
 */

#ifndef INTERNAL_MALLOC

unsigned long * 
Xalloc (amount)
    unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
    char		*malloc();
#endif
    register pointer  ptr;
	
    if ((long)amount <= 0) {
	return (unsigned long *)NULL;
    }
    /* aligned extra on long word boundary */
    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
#ifdef MEMBUG
    if (!Must_have_memory && Memory_fail &&
	((random() % MEM_FAIL_SCALE) < Memory_fail))
	return (unsigned long *)NULL;
#endif
    if (ptr = (pointer)malloc(amount)) {
	return (unsigned long *)ptr;
    }
    if (Must_have_memory)
	FatalError("Out of memory");
    return (unsigned long *)NULL;
}

/*****************
 * XNFalloc 
 * "no failure" realloc, alternate interface to Xalloc w/o Must_have_memory
 *****************/

unsigned long *
XNFalloc (amount)
    unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
    char             *malloc();
#endif
    register pointer ptr;

    if ((long)amount <= 0)
    {
        return (unsigned long *)NULL;
    }
    /* aligned extra on long word boundary */
    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
    ptr = (pointer)malloc(amount);
    if (!ptr)
    {
        FatalError("Out of memory");
    }
    return ((unsigned long *)ptr);
}

/*****************
 * Xcalloc
 *****************/

unsigned long *
Xcalloc (amount)
    unsigned long   amount;
{
    unsigned long   *ret;

    ret = Xalloc (amount);
    if (ret)
	bzero ((char *) ret, (int) amount);
    return ret;
}

/*****************
 * Xrealloc
 *****************/

unsigned long *
Xrealloc (ptr, amount)
    register pointer ptr;
    unsigned long amount;
{
#if !defined(__STDC__) && !defined(AMOEBA)
    char *malloc();
    char *realloc();
#endif

#ifdef MEMBUG
    if (!Must_have_memory && Memory_fail &&
	((random() % MEM_FAIL_SCALE) < Memory_fail))
	return (unsigned long *)NULL;
#endif
    if ((long)amount <= 0)
    {
	if (ptr && !amount)
	    free(ptr);
	return (unsigned long *)NULL;
    }
    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
    if (ptr)
        ptr = (pointer)realloc((char *)ptr, amount);
    else
	ptr = (pointer)malloc(amount);
    if (ptr)
        return (unsigned long *)ptr;
    if (Must_have_memory)
	FatalError("Out of memory");
    return (unsigned long *)NULL;
}
                    
/*****************
 * XNFrealloc 
 * "no failure" realloc, alternate interface to Xrealloc w/o Must_have_memory
 *****************/

unsigned long *
XNFrealloc (ptr, amount)
    register pointer ptr;
    unsigned long amount;
{
    if (( ptr = (pointer)Xrealloc( ptr, amount ) ) == NULL)
    {
        FatalError( "Out of memory" );
    }
    return ((unsigned long *)ptr);
}

/*****************
 *  Xfree
 *    calls free 
 *****************/    

void
Xfree(ptr)
    register pointer ptr;
{
    if (ptr)
	free((char *)ptr); 
}

void
OsInitAllocator ()
{
#ifdef MEMBUG
    static int	been_here;

    /* Check the memory system after each generation */
    if (been_here)
	CheckMemory ();
    else
	been_here = 1;
#endif
}
#endif

void
AuditPrefix(f)
    char *f;
{
#ifdef X_NOT_STDC_ENV
    long tm;
#else
    time_t tm;
#endif
    char *autime, *s;
    if (*f != ' ')
    {
	time(&tm);
	autime = ctime(&tm);
	if (s = strchr(autime, '\n'))
	    *s = '\0';
	if (s = strrchr(argvGlobal[0], '/'))
	    s++;
	else
	    s = argvGlobal[0];
	ErrorF("AUDIT: %s: %d %s: ", autime, getpid(), s);
    }
}

/*VARARGS1*/
void
AuditF(
#if NeedVarargsPrototypes
    char * f, ...)
#else
    f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9) /* limit of ten args */
    char *f;
    char *s0, *s1, *s2, *s3, *s4, *s5, *s6, *s7, *s8, *s9;
#endif
{
#if NeedVarargsPrototypes
    va_list args;
#endif

    AuditPrefix(f);

#if NeedVarargsPrototypes
    va_start(args, f);
    VErrorF(f, args);
    va_end(args);
#else
    ErrorF(f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9);
#endif
}

/*VARARGS1*/
void
FatalError(
#if NeedVarargsPrototypes
    char *f, ...)
#else
f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9) /* limit of ten args */
    char *f;
    char *s0, *s1, *s2, *s3, *s4, *s5, *s6, *s7, *s8, *s9;
#endif
{
#if NeedVarargsPrototypes
    va_list args;
#endif
    ErrorF("\nFatal server error:\n");
#if NeedVarargsPrototypes
    va_start(args, f);
    VErrorF(f, args);
    va_end(args);
#else
    ErrorF(f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9);
#endif
    ErrorF("\n");
#ifdef DDXOSFATALERROR
    OsVendorFatalError();
#endif
    AbortServer();
    /*NOTREACHED*/
}

#if NeedVarargsPrototypes
void
VErrorF(f, args)
    char *f;
    va_list args;
{
#if !defined(DGUX)
#ifdef AIXV3
    vfprintf(aixfd, f, args);
    fflush (aixfd);
    if (SyncOn)
        sync();
#else
    vfprintf(stderr, f, args);
#endif /* AIXV3 */
#else /* DGUX */
    /* writing to the console while the server is running is bad with DG/ux */
    static Bool firstTime = TRUE;
    static Bool suppress = FALSE;

    if (firstTime) {
	firstTime = FALSE;
	if (isatty(fileno(stderr)))
	    suppress = TRUE;
    }
    if (!suppress)
	vfprintf(stderr, f, args);
#endif /* DGUX */
}
#endif

/*VARARGS1*/
void
ErrorF(
#if NeedVarargsPrototypes
    char * f, ...)
#else
 f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9) /* limit of ten args */
    char *f;
    char *s0, *s1, *s2, *s3, *s4, *s5, *s6, *s7, *s8, *s9;
#endif
{
#if NeedVarargsPrototypes
    va_list args;
    va_start(args, f);
    VErrorF(f, args);
    va_end(args);
#else
#if !defined(DGUX)
#ifdef AIXV3
    fprintf(aixfd, f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9);
    fflush (aixfd);
    if (SyncOn)
        sync();
#else /* not AIXV3 */
#ifdef AMOEBA
    mu_lock(&print_lock);
#endif
    fprintf( stderr, f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9);
#ifdef AMOEBA
    mu_unlock(&print_lock);
#endif
#endif /* AIXV3 */
#else /* DGUX */
    /* writing to the console while the server is running is bad with DG/ux */
    static Bool firstTime = TRUE;
    static Bool suppress = FALSE;

    if (firstTime) {
	firstTime = FALSE;
	if (isatty(fileno(stderr)))
	    suppress = TRUE;
    }
    if (!suppress)
	fprintf(stderr, f, s0, s1, s2, s3, s4, s5, s6, s7, s8, s9);
#endif /* DGUX */
#endif
}

#ifdef AIXV3
OpenDebug()
{
    char aixlogfile[100];
    struct stat aixfilebuf;

        sprintf(aixlogfile,"/tmp/xlogfile%d",getpid());

        /* if the logfile already exists & is a symlink, fopen() overwrites
         * it without unlinking the file. It is necessary to unlink the
         * logfile to avoid a security breach & possible exploitation.
         */
        if (stat((const char *)aixlogfile,&aixfilebuf) == 0)
                unlink(aixlogfile);
        if((aixfd = fopen(aixlogfile,"w")) == NULL )
        {
                fprintf(stderr,"open %s failed\n",aixlogfile);
                exit(-1);
        }
        chmod(aixlogfile,00644);
}
#endif

#if !defined(WIN32) && !defined(__EMX__)
/*
 * "safer" versions of system(3), popen(3) and pclose(3) which give up
 * all privs before running a command.
 *
 * This is based on the code in FreeBSD 2.2 libc.
 */

int
System(command)
    char *command;
{
    int pid, p;
    void (*csig)();
    int status;

    if (!command)
	return(1);

#ifdef SIGCHLD
    csig = signal(SIGCHLD, SIG_DFL);
#endif

    ErrorF("System: `%s'\n", command);

    switch (pid = fork()) {
    case -1:	/* error */
	p = -1;
    case 0:	/* child */
	setgid(getgid());
	setuid(getuid());
	execl("/bin/sh", "sh", "-c", command, (char *)NULL);
	_exit(127);
    default:	/* parent */
	do {
	    p = waitpid(pid, &status, 0);
	} while (p == -1 && errno == EINTR);
	
    }

#ifdef SIGCHLD
    signal(SIGCHLD, csig);
#endif

    return p == -1 ? -1 : status;
}

static struct pid {
    struct pid *next;
    FILE *fp;
    int pid;
} *pidlist;

pointer
Popen(command, type)
    char *command;
    char *type;
{
    struct pid *cur;
    FILE *iop;
    int pdes[2], pid;
    void (*csig)();

    if (command == NULL || type == NULL)
	return NULL;

    if ((*type != 'r' && *type != 'w') || type[1])
	return NULL;

    if ((cur = (struct pid *)xalloc(sizeof(struct pid))) == NULL)
	return NULL;

    if (pipe(pdes) < 0) {
	xfree(cur);
	return NULL;
    }

    switch (pid = fork()) {
    case -1: 	/* error */
	close(pdes[0]);
	close(pdes[1]);
	xfree(cur);
	return NULL;
    case 0:	/* child */
	setgid(getgid());
	setuid(getuid());
	if (*type == 'r') {
	    if (pdes[1] != 1) {
		/* stdout */
		dup2(pdes[1], 1);
		close(pdes[1]);
	    }
	    close(pdes[0]);
	} else {
	    if (pdes[0] != 0) {
		/* stdin */
		dup2(pdes[0], 0);
		close(pdes[0]);
	    }
	    close(pdes[1]);
	}
	execl("/bin/sh", "sh", "-c", command, (char *)NULL);
	_exit(127);
    }

    /* parent */
    if (*type == 'r') {
	iop = fdopen(pdes[0], type);
	close(pdes[1]);
    } else {
	iop = fdopen(pdes[1], type);
	close(pdes[0]);
    }

    cur->fp = iop;
    cur->pid = pid;
    cur->next = pidlist;
    pidlist = cur;

#if 0
    ErrorF("Popen: `%s', fp = %p\n", command, iop);
#endif

    return iop;
}

int
Pclose(iop)
    pointer iop;
{
    struct pid *cur, *last;
    int omask;
    int pstat;
    int pid;

#if 0
    ErrorF("Pclose: fp = %p\n", iop);
#endif

    fclose(iop);

    for (last = NULL, cur = pidlist; cur; last = cur, cur = cur->next)
	if (cur->fp == iop)
	    break;
    if (cur == NULL)
	return -1;

    do {
	pid = waitpid(cur->pid, &pstat, 0);
    } while (pid == -1 && errno == EINTR);

    if (last == NULL)
	pidlist = cur->next;
    else
	last->next = cur->next;
    xfree(cur);

    return pid == -1 ? -1 : pstat;
}
#endif /* !WIN32 && !__EMX__ */
