xserver git update 15/5/2010

1 files changed, 1910 insertions, 1957 deletions

diff --git a/xorg-server/os/utils.c b/xorg-server/os/utils.c
index 7ab7cc3db..7f556a912 100644
--- a/xorg-server/os/utils.c
+++ b/xorg-server/os/utils.c
@@ -1,1957 +1,1910 @@
-/*
-
-Copyright 1987, 1998  The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-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 OPEN GROUP 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 Open Group 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 Open Group.
-
-
-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.
-
-*/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#ifdef __CYGWIN__
-#include <stdlib.h>
-#include <signal.h>
-/*
-   Sigh... We really need a prototype for this to know it is stdcall,
-   but #include-ing <windows.h> here is not a good idea...
-*/
-__stdcall unsigned long GetTickCount(void);
-#endif
-
-#if defined(WIN32) && !defined(__CYGWIN__)
-#include <X11/Xwinsock.h>
-#endif
-#include <X11/Xos.h>
-#include <stdio.h>
-#include <time.h>
-#if !defined(WIN32) || !defined(__MINGW32__)
-#include <sys/time.h>
-#include <sys/resource.h>
-#endif
-#include "misc.h"
-#include <X11/X.h>
-#define XSERV_t
-#define TRANS_SERVER
-#define TRANS_REOPEN
-#include <X11/Xtrans/Xtrans.h>
-#include "input.h"
-#include "dixfont.h"
-#include "osdep.h"
-#include "extension.h"
-#ifdef X_POSIX_C_SOURCE
-#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
-#include <signal.h>
-#undef _POSIX_C_SOURCE
-#else
-#if defined(_POSIX_SOURCE)
-#include <signal.h>
-#else
-#define _POSIX_SOURCE
-#include <signal.h>
-#undef _POSIX_SOURCE
-#endif
-#endif
-#ifndef WIN32
-#include <sys/wait.h>
-#endif
-#if !defined(SYSV) && !defined(WIN32) 
-#include <sys/resource.h>
-#endif
-#include <sys/stat.h>
-#include <ctype.h>    /* for isspace */
-#include <stdarg.h>
-
-#include <stdlib.h>	/* for malloc() */
-
-#if defined(TCPCONN) || defined(STREAMSCONN)
-# ifndef WIN32
-#  include <netdb.h>
-# endif
-#endif
-
-#include "opaque.h"
-
-#include "dixstruct.h"
-
-#include "xkbsrv.h"
-
-#include "picture.h"
-
-Bool noTestExtensions;
-#ifdef COMPOSITE
-Bool noCompositeExtension = FALSE;
-#endif
-
-#ifdef DAMAGE
-Bool noDamageExtension = FALSE;
-#endif
-#ifdef DBE
-Bool noDbeExtension = FALSE;
-#endif
-#ifdef DPMSExtension
-Bool noDPMSExtension = FALSE;
-#endif
-#ifdef GLXEXT
-Bool noGlxExtension = FALSE;
-Bool noGlxVisualInit = FALSE;
-#endif
-#ifdef SCREENSAVER
-Bool noScreenSaverExtension = FALSE;
-#endif
-#ifdef MITSHM
-Bool noMITShmExtension = FALSE;
-#endif
-#ifdef RANDR
-Bool noRRExtension = FALSE;
-#endif
-Bool noRenderExtension = FALSE;
-#ifdef XCSECURITY
-Bool noSecurityExtension = FALSE;
-#endif
-#ifdef RES
-Bool noResExtension = FALSE;
-#endif
-#ifdef XF86BIGFONT
-Bool noXFree86BigfontExtension = FALSE;
-#endif
-#ifdef XFreeXDGA
-Bool noXFree86DGAExtension = FALSE;
-#endif
-#ifdef XF86DRI
-Bool noXFree86DRIExtension = FALSE;
-#endif
-#ifdef XF86VIDMODE
-Bool noXFree86VidModeExtension = FALSE;
-#endif
-#ifdef XFIXES
-Bool noXFixesExtension = FALSE;
-#endif
-#ifdef PANORAMIX
-/* Xinerama is disabled by default unless enabled via +xinerama */
-Bool noPanoramiXExtension = TRUE;
-#endif
-#ifdef XSELINUX
-Bool noSELinuxExtension = FALSE;
-int selinuxEnforcingState = SELINUX_MODE_DEFAULT;
-#endif
-#ifdef XV
-Bool noXvExtension = FALSE;
-#endif
-#ifdef DRI2
-Bool noDRI2Extension = FALSE;
-#endif
-
-Bool noGEExtension = FALSE;
-
-#define X_INCLUDE_NETDB_H
-#include <X11/Xos_r.h>
-
-#include <errno.h>
-
-Bool CoreDump;
-
-#ifdef PANORAMIX
-Bool PanoramiXExtensionDisabledHack = FALSE;
-#endif
-
-int auditTrailLevel = 1;
-
-#if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
-#define HAS_SAVED_IDS_AND_SETEUID
-#endif
-
-static char *dev_tty_from_init = NULL;	/* since we need to parse it anyway */
-
-OsSigHandlerPtr
-OsSignal(int sig, OsSigHandlerPtr handler)
-{
-    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;
-    if (sigaction(sig, &act, &oact))
-      perror("sigaction");
-    return oact.sa_handler;
-}
-
-/*
- * 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.
- */
-#define LOCK_DIR "/tmp"
-#define LOCK_TMP_PREFIX "/.tX"
-#define LOCK_PREFIX "/.X"
-#define LOCK_SUFFIX "-lock"
-
-#ifndef PATH_MAX
-#include <sys/param.h>
-#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];
-static Bool nolock = FALSE;
-
-/*
- * 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(void)
-{
-  char tmp[PATH_MAX], pid_str[12];
-  int lfd, i, haslock, l_pid, t;
-  char *tmppath = NULL;
-  int len;
-  char port[20];
-
-  if (nolock) return;
-  /*
-   * Path names
-   */
-  tmppath = LOCK_DIR;
-
-  sprintf(port, "%d", atoi(display));
-  len = strlen(LOCK_PREFIX) > strlen(LOCK_TMP_PREFIX) ? strlen(LOCK_PREFIX) :
-						strlen(LOCK_TMP_PREFIX);
-  len += strlen(tmppath) + strlen(port) + strlen(LOCK_SUFFIX) + 1;
-  if (len > sizeof(LockFile))
-    FatalError("Display name `%s' is too long\n", port);
-  (void)sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX, tmppath, port);
-  (void)sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX, tmppath, port);
-
-  /*
-   * 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, "%10ld\n", (long)getpid());
-  (void) write(lfd, pid_str, 11);
-  (void) chmod(tmp, 0444);
-  (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",
-		   port, "\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;
-}
-
-/*
- * UnlockServer --
- *      Remove the server lock file.
- */
-void
-UnlockServer(void)
-{
-  if (nolock) return;
-
-  if (!StillLocking){
-
-  (void) unlink(LockFile);
-  }
-}
-
-/* Force connections to close on SIGHUP from init */
-
-void
-AutoResetServer (int sig)
-{
-    int olderrno = errno;
-
-    dispatchException |= DE_RESET;
-    isItTimeToYield = TRUE;
-    errno = olderrno;
-}
-
-/* Force connections to close and then exit on SIGTERM, SIGINT */
-
-void
-GiveUp(int sig)
-{
-    int olderrno = errno;
-
-    dispatchException |= DE_TERMINATE;
-    isItTimeToYield = TRUE;
-    errno = olderrno;
-}
-
-#if (defined WIN32 && defined __MINGW32__) || defined(__CYGWIN__)
-CARD32
-GetTimeInMillis (void)
-{
-  return GetTickCount ();
-}
-#else
-CARD32
-GetTimeInMillis(void)
-{
-    struct timeval tv;
-
-#ifdef MONOTONIC_CLOCK
-    struct timespec tp;
-    if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
-        return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L);
-#endif
-
-    X_GETTIMEOFDAY(&tv);
-    return(tv.tv_sec * 1000) + (tv.tv_usec / 1000);
-}
-#endif
-
-void
-AdjustWaitForDelay (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(void)
-{
-    ErrorF("use: X [:<display>] [option]\n");
-    ErrorF("-a #                   default pointer acceleration (factor)\n");
-    ErrorF("-ac                    disable access control restrictions\n");
-    ErrorF("-audit int             set audit trail level\n");	
-    ErrorF("-auth file             select authorization file\n");	
-    ErrorF("-br                    create root window with black background\n");
-    ErrorF("+bs                    enable any backing store support\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("-nocursor              disable the cursor\n");
-    ErrorF("-core                  generate core dump on fatal error\n");
-    ErrorF("-dpi int               screen resolution in dots per inch\n");
-#ifdef DPMSExtension
-    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
-    ErrorF("-nolock                disable the locking mechanism\n");
-#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("-noreset               don't reset after last client exists\n");
-    ErrorF("-reset                 reset after last client exists\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("-render [default|mono|gray|color] set render color alloc policy\n");
-    ErrorF("-retro                 start with classic stipple and cursor\n");
-    ErrorF("-s #                   screen-saver timeout (minutes)\n");
-    ErrorF("-t #                   default pointer threshold (pixels/t)\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("-wr                    create root window with white background\n");
-    ErrorF("-maxbigreqsize         set maximal bigrequest size \n");
-#ifdef PANORAMIX
-    ErrorF("+xinerama              Enable XINERAMA extension\n");
-    ErrorF("-xinerama              Disable XINERAMA extension\n");
-#endif
-    ErrorF("-dumbSched             Disable smart scheduling, enable old behavior\n");
-    ErrorF("-schedInterval int     Set scheduler interval in msec\n");
-    ErrorF("+extension name        Enable extension\n");
-    ErrorF("-extension name        Disable extension\n");
-#ifdef XDMCP
-    XdmcpUseMsg();
-#endif
-    XkbUseMsg();
-    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
- */
-static int 
-VerifyDisplayName(const 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(int argc, char *argv[])
-{
-    int i, skip;
-
-    defaultKeyboardControl.autoRepeat = TRUE;
-
-#ifdef NO_PART_NET
-    PartialNetwork = FALSE;
-#else
-    PartialNetwork = TRUE;
-#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();
-		FatalError("Bad display name, exiting: %s\n", display);
-            }
-	}
-	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;
-	}
-	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], "-br") == 0) ; /* default */
-	else if ( strcmp( argv[i], "+bs") == 0)
-	    enableBackingStore = 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], "-core") == 0)
-	{
-#if !defined(WIN32) || !defined(__MINGW32__)
-	    struct rlimit   core_limit;
-	    getrlimit (RLIMIT_CORE, &core_limit);
-	    core_limit.rlim_cur = core_limit.rlim_max;
-	    setrlimit (RLIMIT_CORE, &core_limit);
-#endif
-	    CoreDump = TRUE;
-	}
-        else if ( strcmp( argv[i], "-nocursor") == 0)
-        {
-            EnableCursor = FALSE;
-        }
-        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)
-	    /* ignored for compatibility */ ;
-	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)
-	    {
-	        defaultFontPath = argv[i];
-	    }
-	    else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-help") == 0)
-	{
-	    UseMsg();
-	    exit(0);
-	}
-        else if ( (skip=XkbProcessArguments(argc,argv,i))!=0 ) {
-	    if (skip>0)
-		 i+= skip-1;
-	    else UseMsg();
-	}
-#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
-	else if ( strcmp ( argv[i], "-nolock") == 0)
-	{
-#if !defined(WIN32) && !defined(__CYGWIN__)
-	  if (getuid() != 0)
-	    ErrorF("Warning: the -nolock option can only be used by root\n");
-	  else
-#endif
-	    nolock = TRUE;
-	}
-#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) {
-		if (_XSERVTransNoListen(argv[i])) 
-		    FatalError ("Failed to disable listen for %s transport",
-				argv[i]);
-	   } else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-noreset") == 0)
-	{
-	    dispatchExceptionAtReset = 0;
-	}
-	else if ( strcmp( argv[i], "-reset") == 0)
-	{
-	    dispatchExceptionAtReset = DE_RESET;
-	}
-	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], "-pogo") == 0)
-	{
-	    dispatchException = DE_TERMINATE;
-	}
-	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], "-retro") == 0)
-	    party_like_its_1989 = TRUE;
-	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], "-t") == 0)
-	{
-	    if(++i < argc)
-	        defaultPointerControl.threshold = atoi(argv[i]);
-	    else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-terminate") == 0)
-	{
-	    dispatchExceptionAtReset = DE_TERMINATE;
-	}
-	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], "-wr") == 0)
-            whiteRoot = TRUE;
-        else if ( strcmp( argv[i], "-maxbigreqsize") == 0) {
-             if(++i < argc) {
-                 long reqSizeArg = atol(argv[i]);
-
-                 /* Request size > 128MB does not make much sense... */
-                 if( reqSizeArg > 0L && reqSizeArg < 128L ) {
-                     maxBigRequestSize = (reqSizeArg * 1048576L) - 1L;
-                 }
-                 else
-                 {
-                     UseMsg();
-                 }
-             }
-             else
-             {
-                 UseMsg();
-             }
-         }
-#ifdef PANORAMIX
-	else if ( strcmp( argv[i], "+xinerama") == 0){
-	    noPanoramiXExtension = FALSE;
-	}
-	else if ( strcmp( argv[i], "-xinerama") == 0){
-	    noPanoramiXExtension = TRUE;
-	}
-	else if ( strcmp( argv[i], "-disablexineramaextension") == 0){
-	    PanoramiXExtensionDisabledHack = TRUE;
-	}
-#endif
-	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
-	else if ( strcmp( argv[i], "-dumbSched") == 0)
-	{
-	    SmartScheduleDisable = TRUE;
-	}
-	else if ( strcmp( argv[i], "-schedInterval") == 0)
-	{
-	    if (++i < argc)
-	    {
-		SmartScheduleInterval = atoi(argv[i]);
-		SmartScheduleSlice = SmartScheduleInterval;
-	    }
-	    else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-schedMax") == 0)
-	{
-	    if (++i < argc)
-	    {
-		SmartScheduleMaxSlice = atoi(argv[i]);
-	    }
-	    else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-render" ) == 0)
-	{
-	    if (++i < argc)
-	    {
-		int policy = PictureParseCmapPolicy (argv[i]);
-
-		if (policy != PictureCmapPolicyInvalid)
-		    PictureCmapPolicy = policy;
-		else
-		    UseMsg ();
-	    }
-	    else
-		UseMsg ();
-	}
-	else if ( strcmp( argv[i], "+extension") == 0)
-	{
-	    if (++i < argc)
-	    {
-		if (!EnableDisableExtension(argv[i], TRUE))
-		    EnableDisableExtensionError(argv[i], TRUE);
-	    }
-	    else
-		UseMsg();
-	}
-	else if ( strcmp( argv[i], "-extension") == 0)
-	{
-	    if (++i < argc)
-	    {
-		if (!EnableDisableExtension(argv[i], FALSE))
-		    EnableDisableExtensionError(argv[i], FALSE);
-	    }
-	    else
-		UseMsg();
-	}
- 	else
- 	{
-	    ErrorF("Unrecognized option: %s\n", argv[i]);
-	    UseMsg();
-	    FatalError("Unrecognized option: %s\n", argv[i]);
-        }
-    }
-}
-
-/* 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(char **authorizations, int *authlen, pointer client)
-{
-#define AUTHORIZATION_NAME "hp-hostname-1"
-#if defined(TCPCONN) || defined(STREAMSCONN)
-    static char *result = NULL;
-    static char *p = NULL;
-
-    if (p == NULL)
-    {
-	char hname[1024], *hnameptr;
-	unsigned int len;
-#if defined(IPv6) && defined(AF_INET6)
-	struct addrinfo hints, *ai = NULL;
-#else
-	struct hostent *host;
-#ifdef XTHREADS_NEEDS_BYNAMEPARAMS
-	_Xgethostbynameparams hparams;
-#endif
-#endif
-
-	gethostname(hname, 1024);
-#if defined(IPv6) && defined(AF_INET6)
-	bzero(&hints, sizeof(hints));
-	hints.ai_flags = AI_CANONNAME;
-	if (getaddrinfo(hname, NULL, &hints, &ai) == 0) {
-	    hnameptr = ai->ai_canonname;
-	} else {
-	    hnameptr = hname;
-	}
-#else
-	host = _XGethostbyname(hname, hparams);
-	if (host == NULL)
-	    hnameptr = hname;
-	else
-	    hnameptr = host->h_name;
-#endif
-
-	len = strlen(hnameptr) + 1;
-	result = xalloc(len + sizeof(AUTHORIZATION_NAME) + 4);
-
-	p = result;
-        *p++ = sizeof(AUTHORIZATION_NAME) >> 8;
-        *p++ = sizeof(AUTHORIZATION_NAME) & 0xff;
-        *p++ = (len) >> 8;
-        *p++ = (len & 0xff);
-
-	memmove(p, AUTHORIZATION_NAME, sizeof(AUTHORIZATION_NAME));
-	p += sizeof(AUTHORIZATION_NAME);
-	memmove(p, hnameptr, len);
-	p += len;
-#if defined(IPv6) && defined(AF_INET6)
-	if (ai) {
-	    freeaddrinfo(ai);
-	}
-#endif
-    }
-    *authlen = p - result;
-    *authorizations = result;
-    return 1;
-#else /* TCPCONN */
-    return 0;
-#endif /* TCPCONN */
-}
-
-void *
-Xalloc(unsigned long amount)
-{
-    void *ptr;
-
-    if ((long)amount <= 0) {
-	return NULL;
-    }
-    /* aligned extra on long word boundary */
-    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
-    ptr = malloc(amount);
-    return ptr;
-}
-
-/*****************
- * XNFalloc 
- * "no failure" realloc
- *****************/
-
-void *
-XNFalloc(unsigned long amount)
-{
-    void *ptr;
-
-    if ((long)amount <= 0)
-        return NULL;
-    /* aligned extra on long word boundary */
-    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
-    ptr = malloc(amount);
-    if (!ptr)
-        FatalError("Out of memory");
-    return ptr;
-}
-
-/*****************
- * Xcalloc
- *****************/
-
-void *
-Xcalloc(unsigned long amount)
-{
-    void *ret;
-
-    ret = Xalloc (amount);
-    if (ret)
-	bzero (ret, (int) amount);
-    return ret;
-}
-
-/*****************
- * XNFcalloc
- *****************/
-
-void *
-XNFcalloc(unsigned long amount)
-{
-    void *ret;
-
-    ret = Xalloc (amount);
-    if (ret)
-	bzero (ret, (int) amount);
-    else if ((long)amount > 0)
-        FatalError("Out of memory");
-    return ret;
-}
-
-/*****************
- * Xrealloc
- *****************/
-
-void *
-Xrealloc(pointer ptr, unsigned long amount)
-{
-    if ((long)amount <= 0)
-    {
-	if (ptr && !amount)
-	    free(ptr);
-	return NULL;
-    }
-    amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
-    if (ptr)
-        ptr = realloc(ptr, amount);
-    else
-	ptr = malloc(amount);
-
-    return ptr;
-}
-                    
-/*****************
- * XNFrealloc 
- * "no failure" realloc
- *****************/
-
-void *
-XNFrealloc(pointer ptr, unsigned long amount)
-{
-    if ((ptr = Xrealloc(ptr, amount)) == NULL)
-    {
-	if ((long)amount > 0)
-            FatalError( "Out of memory" );
-    }
-    return ptr;
-}
-
-/*****************
- *  Xfree
- *    calls free 
- *****************/    
-
-void
-Xfree(pointer ptr)
-{
-    if (ptr)
-	free(ptr); 
-}
-
-
-char *
-Xstrdup(const char *s)
-{
-    char *sd;
-
-    if (s == NULL)
-	return NULL;
-
-    sd = Xalloc(strlen(s) + 1);
-    if (sd != NULL)
-	strcpy(sd, s);
-    return sd;
-}
-
-
-char *
-XNFstrdup(const char *s)
-{
-    char *sd;
-
-    if (s == NULL)
-	return NULL;
-
-    sd = XNFalloc(strlen(s) + 1);
-    strcpy(sd, s);
-    return sd;
-}
-
-
-#ifdef SIGVTALRM
-#define SMART_SCHEDULE_POSSIBLE
-#endif
-
-#ifdef SMART_SCHEDULE_POSSIBLE
-#define SMART_SCHEDULE_SIGNAL		SIGALRM
-#define SMART_SCHEDULE_TIMER		ITIMER_REAL
-#endif
-
-void
-SmartScheduleStopTimer (void)
-{
-#ifdef SMART_SCHEDULE_POSSIBLE
-    struct itimerval	timer;
-    
-    if (SmartScheduleDisable)
-	return;
-    timer.it_interval.tv_sec = 0;
-    timer.it_interval.tv_usec = 0;
-    timer.it_value.tv_sec = 0;
-    timer.it_value.tv_usec = 0;
-    (void) setitimer (ITIMER_REAL, &timer, 0);
-#endif
-}
-
-void
-SmartScheduleStartTimer (void)
-{
-#ifdef SMART_SCHEDULE_POSSIBLE
-    struct itimerval	timer;
-    
-    if (SmartScheduleDisable)
-	return;
-    timer.it_interval.tv_sec = 0;
-    timer.it_interval.tv_usec = SmartScheduleInterval * 1000;
-    timer.it_value.tv_sec = 0;
-    timer.it_value.tv_usec = SmartScheduleInterval * 1000;
-    setitimer (ITIMER_REAL, &timer, 0);
-#endif
-}
-
-#ifdef SMART_SCHEDULE_POSSIBLE
-static void
-SmartScheduleTimer (int sig)
-{
-    SmartScheduleTime += SmartScheduleInterval;
-}
-#endif
-
-Bool
-SmartScheduleInit (void)
-{
-#ifdef SMART_SCHEDULE_POSSIBLE
-    struct sigaction	act;
-
-    if (SmartScheduleDisable)
-	return TRUE;
-    
-    bzero ((char *) &act, sizeof(struct sigaction));
-
-    /* Set up the timer signal function */
-    act.sa_handler = SmartScheduleTimer;
-    sigemptyset (&act.sa_mask);
-    sigaddset (&act.sa_mask, SMART_SCHEDULE_SIGNAL);
-    if (sigaction (SMART_SCHEDULE_SIGNAL, &act, 0) < 0)
-    {
-	perror ("sigaction for smart scheduler");
-	return FALSE;
-    }
-    return TRUE;
-#else
-    return FALSE;
-#endif
-}
-
-#ifdef SIG_BLOCK
-static sigset_t	PreviousSignalMask;
-static int	BlockedSignalCount;
-#endif
-
-void
-OsBlockSignals (void)
-{
-#ifdef SIG_BLOCK
-    if (BlockedSignalCount++ == 0)
-    {
-	sigset_t    set;
-	
-	sigemptyset (&set);
-#ifdef SIGALRM
-	sigaddset (&set, SIGALRM);
-#endif
-#ifdef SIGVTALRM
-	sigaddset (&set, SIGVTALRM);
-#endif
-#ifdef SIGWINCH
-	sigaddset (&set, SIGWINCH);
-#endif
-#ifdef SIGIO
-	sigaddset (&set, SIGIO);
-#endif
-#ifdef SIGTSTP
-	sigaddset (&set, SIGTSTP);
-#endif
-#ifdef SIGTTIN
-	sigaddset (&set, SIGTTIN);
-#endif
-#ifdef SIGTTOU
-	sigaddset (&set, SIGTTOU);
-#endif
-#ifdef SIGCHLD
-	sigaddset (&set, SIGCHLD);
-#endif
-	sigprocmask (SIG_BLOCK, &set, &PreviousSignalMask);
-    }
-#endif
-}
-
-void
-OsReleaseSignals (void)
-{
-#ifdef SIG_BLOCK
-    if (--BlockedSignalCount == 0)
-    {
-	sigprocmask (SIG_SETMASK, &PreviousSignalMask, 0);
-    }
-#endif
-}
-
-/*
- * Pending signals may interfere with core dumping. Provide a
- * mechanism to block signals when aborting.
- */
-
-void
-OsAbort (void)
-{
-#ifndef __APPLE__
-    OsBlockSignals();
-#endif
-    abort();
-}
-
-#if !defined(WIN32)
-/*
- * "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.
- *
- * XXX It'd be good to redirect stderr so that it ends up in the log file
- * as well.  As it is now, xkbcomp messages don't end up in the log file.
- */
-
-int
-System(char *command)
-{
-    int pid, p;
-#ifdef SIGCHLD
-    void (*csig)(int);
-#endif
-    int status;
-
-    if (!command)
-	return(1);
-
-#ifdef SIGCHLD
-    csig = signal(SIGCHLD, SIG_DFL);
-    if (csig == SIG_ERR) {
-      perror("signal");
-      return -1;
-    }
-#endif
-
-#ifdef DEBUG
-    ErrorF("System: `%s'\n", command);
-#endif
-
-    switch (pid = fork()) {
-    case -1:	/* error */
-	p = -1;
-    case 0:	/* child */
-	if (setgid(getgid()) == -1)
-	    _exit(127);
-	if (setuid(getuid()) == -1)
-	    _exit(127);
-	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
-    if (signal(SIGCHLD, csig) == SIG_ERR) {
-      perror("signal");
-      return -1;
-    }
-#endif
-
-    return p == -1 ? -1 : status;
-}
-
-static struct pid {
-    struct pid *next;
-    FILE *fp;
-    int pid;
-} *pidlist;
-
-OsSigHandlerPtr old_alarm = NULL; /* XXX horrible awful hack */
-
-pointer
-Popen(char *command, char *type)
-{
-    struct pid *cur;
-    FILE *iop;
-    int pdes[2], pid;
-
-    if (command == NULL || type == NULL)
-	return NULL;
-
-    if ((*type != 'r' && *type != 'w') || type[1])
-	return NULL;
-
-    if ((cur = xalloc(sizeof(struct pid))) == NULL)
-	return NULL;
-
-    if (pipe(pdes) < 0) {
-	xfree(cur);
-	return NULL;
-    }
-
-    /* Ignore the smart scheduler while this is going on */
-    old_alarm = OsSignal(SIGALRM, SIG_IGN);
-    if (old_alarm == SIG_ERR) {
-      perror("signal");
-      return NULL;
-    }
-
-    switch (pid = fork()) {
-    case -1: 	/* error */
-	close(pdes[0]);
-	close(pdes[1]);
-	xfree(cur);
-	if (OsSignal(SIGALRM, old_alarm) == SIG_ERR)
-	  perror("signal");
-	return NULL;
-    case 0:	/* child */
-	if (setgid(getgid()) == -1)
-	    _exit(127);
-	if (setuid(getuid()) == -1)
-	    _exit(127);
-	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);
-    }
-
-    /* Avoid EINTR during stdio calls */
-    OsBlockSignals ();
-    
-    /* 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;
-
-#ifdef DEBUG
-    ErrorF("Popen: `%s', fp = %p\n", command, iop);
-#endif
-
-    return iop;
-}
-
-/* fopen that drops privileges */
-pointer
-Fopen(char *file, char *type)
-{
-    FILE *iop;
-#ifndef HAS_SAVED_IDS_AND_SETEUID
-    struct pid *cur;
-    int pdes[2], pid;
-
-    if (file == NULL || type == NULL)
-	return NULL;
-
-    if ((*type != 'r' && *type != 'w') || type[1])
-	return NULL;
-
-    if ((cur = 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 */
-	if (setgid(getgid()) == -1)
-	    _exit(127);
-	if (setuid(getuid()) == -1)
-	    _exit(127);
-	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/cat", "cat", file, (char *)NULL);
-	_exit(127);
-    }
-
-    /* Avoid EINTR during stdio calls */
-    OsBlockSignals ();
-    
-    /* 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;
-
-#ifdef DEBUG
-    ErrorF("Fopen(%s), fp = %p\n", file, iop);
-#endif
-
-    return iop;
-#else
-    int ruid, euid;
-
-    ruid = getuid();
-    euid = geteuid();
-    
-    if (seteuid(ruid) == -1) {
-	    return NULL;
-    }
-    iop = fopen(file, type);
-
-    if (seteuid(euid) == -1) {
-	    fclose(iop);
-	    return NULL;
-    }
-    return iop;
-#endif /* HAS_SAVED_IDS_AND_SETEUID */
-}
-
-int
-Pclose(pointer iop)
-{
-    struct pid *cur, *last;
-    int pstat;
-    int pid;
-
-#ifdef DEBUG
-    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);
-
-    /* allow EINTR again */
-    OsReleaseSignals ();
-    
-    if (old_alarm && OsSignal(SIGALRM, old_alarm) == SIG_ERR) {
-      perror("signal");
-      return -1;
-    }
-
-    return pid == -1 ? -1 : pstat;
-}
-
-int
-Fclose(pointer iop)
-{
-#ifdef HAS_SAVED_IDS_AND_SETEUID
-    return fclose(iop);
-#else
-    return Pclose(iop);
-#endif
-}
-
-#endif /* !WIN32 */
-
-
-/*
- * CheckUserParameters: check for long command line arguments and long
- * environment variables.  By default, these checks are only done when
- * the server's euid != ruid.  In 3.3.x, these checks were done in an
- * external wrapper utility.
- */
-
-/* Consider LD* variables insecure? */
-#ifndef REMOVE_ENV_LD
-#define REMOVE_ENV_LD 1
-#endif
-
-/* Remove long environment variables? */
-#ifndef REMOVE_LONG_ENV
-#define REMOVE_LONG_ENV 1
-#endif
-
-/*
- * Disallow stdout or stderr as pipes?  It's possible to block the X server
- * when piping stdout+stderr to a pipe.
- *
- * Don't enable this because it looks like it's going to cause problems.
- */
-#ifndef NO_OUTPUT_PIPES
-#define NO_OUTPUT_PIPES 0
-#endif
-
-
-/* Check args and env only if running setuid (euid == 0 && euid != uid) ? */
-#ifndef CHECK_EUID
-#ifndef WIN32
-#define CHECK_EUID 1
-#else
-#define CHECK_EUID 0
-#endif
-#endif
-
-/*
- * Maybe the locale can be faked to make isprint(3) report that everything
- * is printable?  Avoid it by default.
- */
-#ifndef USE_ISPRINT
-#define USE_ISPRINT 0
-#endif
-
-#define MAX_ARG_LENGTH          128
-#define MAX_ENV_LENGTH          256
-#define MAX_ENV_PATH_LENGTH     2048	/* Limit for *PATH and TERMCAP */
-
-#if USE_ISPRINT
-#include <ctype.h>
-#define checkPrintable(c) isprint(c)
-#else
-#define checkPrintable(c) (((c) & 0x7f) >= 0x20 && ((c) & 0x7f) != 0x7f)
-#endif
-
-enum BadCode {
-    NotBad = 0,
-    UnsafeArg,
-    ArgTooLong,
-    UnprintableArg,
-    EnvTooLong,
-    OutputIsPipe,
-    InternalError
-};
-
-#if defined(VENDORSUPPORT)
-#define BUGADDRESS VENDORSUPPORT
-#elif defined(BUILDERADDR)
-#define BUGADDRESS BUILDERADDR
-#else
-#define BUGADDRESS "xorg@freedesktop.org"
-#endif
-
-void
-CheckUserParameters(int argc, char **argv, char **envp)
-{
-    enum BadCode bad = NotBad;
-    int i = 0, j;
-    char *a, *e = NULL;
-
-#if CHECK_EUID
-    if (geteuid() == 0 && getuid() != geteuid())
-#endif
-    {
-	/* Check each argv[] */
-	for (i = 1; i < argc; i++) {
-	    if (strcmp(argv[i], "-fp") == 0)
-	    {
-		i++; /* continue with next argument. skip the length check */
-		if (i >= argc)
-		    break;
-	    } else
-	    {
-		if (strlen(argv[i]) > MAX_ARG_LENGTH) {
-		    bad = ArgTooLong;
-		    break;
-		}
-	    }
-	    a = argv[i];
-	    while (*a) {
-		if (checkPrintable(*a) == 0) {
-		    bad = UnprintableArg;
-		    break;
-		}
-		a++;
-	    }
-	    if (bad)
-		break;
-	}
-	if (!bad) {
-	    /* Check each envp[] */
-	    for (i = 0; envp[i]; i++) {
-
-		/* Check for bad environment variables and values */
-#if REMOVE_ENV_LD
-		while (envp[i] && (strncmp(envp[i], "LD", 2) == 0)) {
-		    for (j = i; envp[j]; j++) {
-			envp[j] = envp[j+1];
-		    }
-		}
-#endif   
-		if (envp[i] && (strlen(envp[i]) > MAX_ENV_LENGTH)) {
-#if REMOVE_LONG_ENV
-		    for (j = i; envp[j]; j++) {
-			envp[j] = envp[j+1];
-		    }
-		    i--;
-#else
-		    char *eq;
-		    int len;
-
-		    eq = strchr(envp[i], '=');
-		    if (!eq)
-			continue;
-		    len = eq - envp[i];
-		    e = malloc(len + 1);
-		    if (!e) {
-			bad = InternalError;
-			break;
-		    }
-		    strncpy(e, envp[i], len);
-		    e[len] = 0;
-		    if (len >= 4 &&
-			(strcmp(e + len - 4, "PATH") == 0 ||
-			 strcmp(e, "TERMCAP") == 0)) {
-			if (strlen(envp[i]) > MAX_ENV_PATH_LENGTH) {
-			    bad = EnvTooLong;
-			    break;
-			} else {
-			    free(e);
-			}
-		    } else {
-			bad = EnvTooLong;
-			break;
-		    }
-#endif
-		}
-	    }
-	}
-#if NO_OUTPUT_PIPES
-	if (!bad) {
-	    struct stat buf;
-
-	    if (fstat(fileno(stdout), &buf) == 0 && S_ISFIFO(buf.st_mode))
-		bad = OutputIsPipe;
-	    if (fstat(fileno(stderr), &buf) == 0 && S_ISFIFO(buf.st_mode))
-		bad = OutputIsPipe;
-	}
-#endif
-    }
-    switch (bad) {
-    case NotBad:
-	return;
-    case UnsafeArg:
-	ErrorF("Command line argument number %d is unsafe\n", i);
-	break;
-    case ArgTooLong:
-	ErrorF("Command line argument number %d is too long\n", i);
-	break;
-    case UnprintableArg:
-	ErrorF("Command line argument number %d contains unprintable"
-		" characters\n", i);
-	break;
-    case EnvTooLong:
-	ErrorF("Environment variable `%s' is too long\n", e);
-	break;
-    case OutputIsPipe:
-	ErrorF("Stdout and/or stderr is a pipe\n");
-	break;
-    case InternalError:
-	ErrorF("Internal Error\n");
-	break;
-    default:
-	ErrorF("Unknown error\n");
-	break;
-    }
-    FatalError("X server aborted because of unsafe environment\n");
-}
-
-/*
- * CheckUserAuthorization: check if the user is allowed to start the
- * X server.  This usually means some sort of PAM checking, and it is
- * usually only done for setuid servers (uid != euid).
- */
-
-#ifdef USE_PAM
-#include <security/pam_appl.h>
-#include <security/pam_misc.h>
-#include <pwd.h>
-#endif /* USE_PAM */
-
-void
-CheckUserAuthorization(void)
-{
-#ifdef USE_PAM
-    static struct pam_conv conv = {
-	misc_conv,
-	NULL
-    };
-
-    pam_handle_t *pamh = NULL;
-    struct passwd *pw;
-    int retval;
-
-    if (getuid() != geteuid()) {
-	pw = getpwuid(getuid());
-	if (pw == NULL)
-	    FatalError("getpwuid() failed for uid %d\n", getuid());
-
-	retval = pam_start("xserver", pw->pw_name, &conv, &pamh);
-	if (retval != PAM_SUCCESS)
-	    FatalError("pam_start() failed.\n"
-			"\tMissing or mangled PAM config file or module?\n");
-
-	retval = pam_authenticate(pamh, 0);
-	if (retval != PAM_SUCCESS) {
-	    pam_end(pamh, retval);
-	    FatalError("PAM authentication failed, cannot start X server.\n"
-			"\tPerhaps you do not have console ownership?\n");
-	}
-
-	retval = pam_acct_mgmt(pamh, 0);
-	if (retval != PAM_SUCCESS) {
-	    pam_end(pamh, retval);
-	    FatalError("PAM authentication failed, cannot start X server.\n"
-			"\tPerhaps you do not have console ownership?\n");
-	}
-
-	/* this is not a session, so do not do session management */
-	pam_end(pamh, PAM_SUCCESS);
-    }
-#endif
-}
-
-/*
- * Tokenize a string into a NULL terminated array of strings. Always returns
- * an allocated array unless an error occurs.
- */
-char**
-xstrtokenize(const char *str, const char *separators)
-{
-    char **list, **nlist;
-    char *tok, *tmp;
-    unsigned num = 0, n;
-
-    if (!str)
-        return NULL;
-    list = calloc(1, sizeof(*list));
-    if (!list)
-        return NULL;
-    tmp = strdup(str);
-    if (!tmp)
-        goto error;
-    for (tok = strtok(tmp, separators); tok; tok = strtok(NULL, separators)) {
-        nlist = realloc(list, (num + 2) * sizeof(*list));
-        if (!nlist)
-            goto error;
-        list = nlist;
-        list[num] = strdup(tok);
-        if (!list[num])
-            goto error;
-        list[++num] = NULL;
-    }
-    free(tmp);
-    return list;
-
-error:
-    free(tmp);
-    for (n = 0; n < num; n++)
-        free(list[n]);
-    free(list);
-    return NULL;
-}
-
-#ifdef __SCO__
-#include <fcntl.h>
-
-static void
-lockit (int fd, short what)
-{
-  struct flock lck;
-
-  lck.l_whence = 0;
-  lck.l_start = 0;
-  lck.l_len = 1;
-  lck.l_type = what;
-
-  (void)fcntl (fd, F_SETLKW, &lck);
-}
-
-/* SCO OpenServer 5 lacks pread/pwrite. Emulate them. */
-ssize_t
-pread (int fd, void *buf, size_t nbytes, off_t offset)
-{
-  off_t saved;
-  ssize_t ret;
-
-  lockit (fd, F_RDLCK);
-  saved = lseek (fd, 0, SEEK_CUR);
-  lseek (fd, offset, SEEK_SET);
-  ret = read (fd, buf, nbytes);
-  lseek (fd, saved, SEEK_SET);
-  lockit (fd, F_UNLCK);
-
-  return ret;
-}
-
-ssize_t
-pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
-{
-  off_t saved;
-  ssize_t ret;
-
-  lockit (fd, F_WRLCK);
-  saved = lseek (fd, 0, SEEK_CUR);
-  lseek (fd, offset, SEEK_SET);
-  ret = write (fd, buf, nbytes);
-  lseek (fd, saved, SEEK_SET);
-  lockit (fd, F_UNLCK);
-
-  return ret;
-}
-#endif /* __SCO__ */
+/*

+

+Copyright 1987, 1998  The Open Group

+

+Permission to use, copy, modify, distribute, and sell this software and its

+documentation for any purpose is hereby granted without fee, provided that

+the above copyright notice appear in all copies and that both that

+copyright notice and this permission notice appear in supporting

+documentation.

+

+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 OPEN GROUP 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 Open Group 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 Open Group.

+

+

+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.

+

+*/

+

+#ifdef HAVE_DIX_CONFIG_H

+#include <dix-config.h>

+#endif

+

+#ifdef __CYGWIN__

+#include <stdlib.h>

+#include <signal.h>

+/*

+   Sigh... We really need a prototype for this to know it is stdcall,

+   but #include-ing <windows.h> here is not a good idea...

+*/

+__stdcall unsigned long GetTickCount(void);

+#endif

+

+#if defined(WIN32) && !defined(__CYGWIN__)

+#include <X11/Xwinsock.h>

+#endif

+#include <X11/Xos.h>

+#include <stdio.h>

+#include <time.h>

+#if !defined(WIN32) || !defined(__MINGW32__)

+#include <sys/time.h>

+#include <sys/resource.h>

+#endif

+#include "misc.h"

+#include <X11/X.h>

+#define XSERV_t

+#define TRANS_SERVER

+#define TRANS_REOPEN

+#include <X11/Xtrans/Xtrans.h>

+#include "input.h"

+#include "dixfont.h"

+#include "osdep.h"

+#include "extension.h"

+#ifdef X_POSIX_C_SOURCE

+#define _POSIX_C_SOURCE X_POSIX_C_SOURCE

+#include <signal.h>

+#undef _POSIX_C_SOURCE

+#else

+#if defined(_POSIX_SOURCE)

+#include <signal.h>

+#else

+#define _POSIX_SOURCE

+#include <signal.h>

+#undef _POSIX_SOURCE

+#endif

+#endif

+#ifndef WIN32

+#include <sys/wait.h>

+#endif

+#if !defined(SYSV) && !defined(WIN32) 

+#include <sys/resource.h>

+#endif

+#include <sys/stat.h>

+#include <ctype.h>    /* for isspace */

+#include <stdarg.h>

+

+#include <stdlib.h>	/* for malloc() */

+

+#if defined(TCPCONN) || defined(STREAMSCONN)

+# ifndef WIN32

+#  include <netdb.h>

+# endif

+#endif

+

+#include "opaque.h"

+

+#include "dixstruct.h"

+

+#include "xkbsrv.h"

+

+#include "picture.h"

+

+Bool noTestExtensions;

+#ifdef COMPOSITE

+Bool noCompositeExtension = FALSE;

+#endif

+

+#ifdef DAMAGE

+Bool noDamageExtension = FALSE;

+#endif

+#ifdef DBE

+Bool noDbeExtension = FALSE;

+#endif

+#ifdef DPMSExtension

+Bool noDPMSExtension = FALSE;

+#endif

+#ifdef GLXEXT

+Bool noGlxExtension = FALSE;

+Bool noGlxVisualInit = FALSE;

+#endif

+#ifdef SCREENSAVER

+Bool noScreenSaverExtension = FALSE;

+#endif

+#ifdef MITSHM

+Bool noMITShmExtension = FALSE;

+#endif

+#ifdef RANDR

+Bool noRRExtension = FALSE;

+#endif

+Bool noRenderExtension = FALSE;

+#ifdef XCSECURITY

+Bool noSecurityExtension = FALSE;

+#endif

+#ifdef RES

+Bool noResExtension = FALSE;

+#endif

+#ifdef XF86BIGFONT

+Bool noXFree86BigfontExtension = FALSE;

+#endif

+#ifdef XFreeXDGA

+Bool noXFree86DGAExtension = FALSE;

+#endif

+#ifdef XF86DRI

+Bool noXFree86DRIExtension = FALSE;

+#endif

+#ifdef XF86VIDMODE

+Bool noXFree86VidModeExtension = FALSE;

+#endif

+#ifdef XFIXES

+Bool noXFixesExtension = FALSE;

+#endif

+#ifdef PANORAMIX

+/* Xinerama is disabled by default unless enabled via +xinerama */

+Bool noPanoramiXExtension = TRUE;

+#endif

+#ifdef XSELINUX

+Bool noSELinuxExtension = FALSE;

+int selinuxEnforcingState = SELINUX_MODE_DEFAULT;

+#endif

+#ifdef XV

+Bool noXvExtension = FALSE;

+#endif

+#ifdef DRI2

+Bool noDRI2Extension = FALSE;

+#endif

+

+Bool noGEExtension = FALSE;

+

+#define X_INCLUDE_NETDB_H

+#include <X11/Xos_r.h>

+

+#include <errno.h>

+

+Bool CoreDump;

+

+#ifdef PANORAMIX

+Bool PanoramiXExtensionDisabledHack = FALSE;

+#endif

+

+int auditTrailLevel = 1;

+

+#if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)

+#define HAS_SAVED_IDS_AND_SETEUID

+#endif

+

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

+

+OsSigHandlerPtr

+OsSignal(int sig, OsSigHandlerPtr handler)

+{

+    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;

+    if (sigaction(sig, &act, &oact))

+      perror("sigaction");

+    return oact.sa_handler;

+}

+

+/*

+ * 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.

+ */

+#define LOCK_DIR "/tmp"

+#define LOCK_TMP_PREFIX "/.tX"

+#define LOCK_PREFIX "/.X"

+#define LOCK_SUFFIX "-lock"

+

+#ifndef PATH_MAX

+#include <sys/param.h>

+#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];

+static Bool nolock = FALSE;

+

+/*

+ * 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(void)

+{

+  char tmp[PATH_MAX], pid_str[12];

+  int lfd, i, haslock, l_pid, t;

+  char *tmppath = NULL;

+  int len;

+  char port[20];

+

+  if (nolock) return;

+  /*

+   * Path names

+   */

+  tmppath = LOCK_DIR;

+

+  sprintf(port, "%d", atoi(display));

+  len = strlen(LOCK_PREFIX) > strlen(LOCK_TMP_PREFIX) ? strlen(LOCK_PREFIX) :

+						strlen(LOCK_TMP_PREFIX);

+  len += strlen(tmppath) + strlen(port) + strlen(LOCK_SUFFIX) + 1;

+  if (len > sizeof(LockFile))

+    FatalError("Display name `%s' is too long\n", port);

+  (void)sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX, tmppath, port);

+  (void)sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX, tmppath, port);

+

+  /*

+   * 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, "%10ld\n", (long)getpid());

+  (void) write(lfd, pid_str, 11);

+  (void) chmod(tmp, 0444);

+  (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",

+		   port, "\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;

+}

+

+/*

+ * UnlockServer --

+ *      Remove the server lock file.

+ */

+void

+UnlockServer(void)

+{

+  if (nolock) return;

+

+  if (!StillLocking){

+

+  (void) unlink(LockFile);

+  }

+}

+

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

+

+void

+AutoResetServer (int sig)

+{

+    int olderrno = errno;

+

+    dispatchException |= DE_RESET;

+    isItTimeToYield = TRUE;

+    errno = olderrno;

+}

+

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

+

+void

+GiveUp(int sig)

+{

+    int olderrno = errno;

+

+    dispatchException |= DE_TERMINATE;

+    isItTimeToYield = TRUE;

+    errno = olderrno;

+}

+

+#if (defined WIN32 && defined __MINGW32__) || defined(__CYGWIN__)

+CARD32

+GetTimeInMillis (void)

+{

+  return GetTickCount ();

+}

+#else

+CARD32

+GetTimeInMillis(void)

+{

+    struct timeval tv;

+

+#ifdef MONOTONIC_CLOCK

+    struct timespec tp;

+    if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)

+        return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L);

+#endif

+

+    X_GETTIMEOFDAY(&tv);

+    return(tv.tv_sec * 1000) + (tv.tv_usec / 1000);

+}

+#endif

+

+void

+AdjustWaitForDelay (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(void)

+{

+    ErrorF("use: X [:<display>] [option]\n");

+    ErrorF("-a #                   default pointer acceleration (factor)\n");

+    ErrorF("-ac                    disable access control restrictions\n");

+    ErrorF("-audit int             set audit trail level\n");	

+    ErrorF("-auth file             select authorization file\n");	

+    ErrorF("-br                    create root window with black background\n");

+    ErrorF("+bs                    enable any backing store support\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("-nocursor              disable the cursor\n");

+    ErrorF("-core                  generate core dump on fatal error\n");

+    ErrorF("-dpi int               screen resolution in dots per inch\n");

+#ifdef DPMSExtension

+    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

+    ErrorF("-nolock                disable the locking mechanism\n");

+#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("-noreset               don't reset after last client exists\n");

+    ErrorF("-reset                 reset after last client exists\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("-render [default|mono|gray|color] set render color alloc policy\n");

+    ErrorF("-retro                 start with classic stipple and cursor\n");

+    ErrorF("-s #                   screen-saver timeout (minutes)\n");

+    ErrorF("-t #                   default pointer threshold (pixels/t)\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("-wr                    create root window with white background\n");

+    ErrorF("-maxbigreqsize         set maximal bigrequest size \n");

+#ifdef PANORAMIX

+    ErrorF("+xinerama              Enable XINERAMA extension\n");

+    ErrorF("-xinerama              Disable XINERAMA extension\n");

+#endif

+    ErrorF("-dumbSched             Disable smart scheduling, enable old behavior\n");

+    ErrorF("-schedInterval int     Set scheduler interval in msec\n");

+    ErrorF("+extension name        Enable extension\n");

+    ErrorF("-extension name        Disable extension\n");

+#ifdef XDMCP

+    XdmcpUseMsg();

+#endif

+    XkbUseMsg();

+    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

+ */

+static int 

+VerifyDisplayName(const 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(int argc, char *argv[])

+{

+    int i, skip;

+

+    defaultKeyboardControl.autoRepeat = TRUE;

+

+#ifdef NO_PART_NET

+    PartialNetwork = FALSE;

+#else

+    PartialNetwork = TRUE;

+#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();

+		FatalError("Bad display name, exiting: %s\n", display);

+            }

+	}

+	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;

+	}

+	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], "-br") == 0) ; /* default */

+	else if ( strcmp( argv[i], "+bs") == 0)

+	    enableBackingStore = 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], "-core") == 0)

+	{

+#if !defined(WIN32) || !defined(__MINGW32__)

+	    struct rlimit   core_limit;

+	    getrlimit (RLIMIT_CORE, &core_limit);

+	    core_limit.rlim_cur = core_limit.rlim_max;

+	    setrlimit (RLIMIT_CORE, &core_limit);

+#endif

+	    CoreDump = TRUE;

+	}

+        else if ( strcmp( argv[i], "-nocursor") == 0)

+        {

+            EnableCursor = FALSE;

+        }

+        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)

+	    /* ignored for compatibility */ ;

+	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)

+	    {

+	        defaultFontPath = argv[i];

+	    }

+	    else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-help") == 0)

+	{

+	    UseMsg();

+	    exit(0);

+	}

+        else if ( (skip=XkbProcessArguments(argc,argv,i))!=0 ) {

+	    if (skip>0)

+		 i+= skip-1;

+	    else UseMsg();

+	}

+#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

+	else if ( strcmp ( argv[i], "-nolock") == 0)

+	{

+#if !defined(WIN32) && !defined(__CYGWIN__)

+	  if (getuid() != 0)

+	    ErrorF("Warning: the -nolock option can only be used by root\n");

+	  else

+#endif

+	    nolock = TRUE;

+	}

+#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) {

+		if (_XSERVTransNoListen(argv[i])) 

+		    FatalError ("Failed to disable listen for %s transport",

+				argv[i]);

+	   } else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-noreset") == 0)

+	{

+	    dispatchExceptionAtReset = 0;

+	}

+	else if ( strcmp( argv[i], "-reset") == 0)

+	{

+	    dispatchExceptionAtReset = DE_RESET;

+	}

+	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], "-pogo") == 0)

+	{

+	    dispatchException = DE_TERMINATE;

+	}

+	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], "-retro") == 0)

+	    party_like_its_1989 = TRUE;

+	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], "-t") == 0)

+	{

+	    if(++i < argc)

+	        defaultPointerControl.threshold = atoi(argv[i]);

+	    else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-terminate") == 0)

+	{

+	    dispatchExceptionAtReset = DE_TERMINATE;

+	}

+	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], "-wr") == 0)

+            whiteRoot = TRUE;

+        else if ( strcmp( argv[i], "-maxbigreqsize") == 0) {

+             if(++i < argc) {

+                 long reqSizeArg = atol(argv[i]);

+

+                 /* Request size > 128MB does not make much sense... */

+                 if( reqSizeArg > 0L && reqSizeArg < 128L ) {

+                     maxBigRequestSize = (reqSizeArg * 1048576L) - 1L;

+                 }

+                 else

+                 {

+                     UseMsg();

+                 }

+             }

+             else

+             {

+                 UseMsg();

+             }

+         }

+#ifdef PANORAMIX

+	else if ( strcmp( argv[i], "+xinerama") == 0){

+	    noPanoramiXExtension = FALSE;

+	}

+	else if ( strcmp( argv[i], "-xinerama") == 0){

+	    noPanoramiXExtension = TRUE;

+	}

+	else if ( strcmp( argv[i], "-disablexineramaextension") == 0){

+	    PanoramiXExtensionDisabledHack = TRUE;

+	}

+#endif

+	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

+	else if ( strcmp( argv[i], "-dumbSched") == 0)

+	{

+	    SmartScheduleDisable = TRUE;

+	}

+	else if ( strcmp( argv[i], "-schedInterval") == 0)

+	{

+	    if (++i < argc)

+	    {

+		SmartScheduleInterval = atoi(argv[i]);

+		SmartScheduleSlice = SmartScheduleInterval;

+	    }

+	    else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-schedMax") == 0)

+	{

+	    if (++i < argc)

+	    {

+		SmartScheduleMaxSlice = atoi(argv[i]);

+	    }

+	    else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-render" ) == 0)

+	{

+	    if (++i < argc)

+	    {

+		int policy = PictureParseCmapPolicy (argv[i]);

+

+		if (policy != PictureCmapPolicyInvalid)

+		    PictureCmapPolicy = policy;

+		else

+		    UseMsg ();

+	    }

+	    else

+		UseMsg ();

+	}

+	else if ( strcmp( argv[i], "+extension") == 0)

+	{

+	    if (++i < argc)

+	    {

+		if (!EnableDisableExtension(argv[i], TRUE))

+		    EnableDisableExtensionError(argv[i], TRUE);

+	    }

+	    else

+		UseMsg();

+	}

+	else if ( strcmp( argv[i], "-extension") == 0)

+	{

+	    if (++i < argc)

+	    {

+		if (!EnableDisableExtension(argv[i], FALSE))

+		    EnableDisableExtensionError(argv[i], FALSE);

+	    }

+	    else

+		UseMsg();

+	}

+ 	else

+ 	{

+	    ErrorF("Unrecognized option: %s\n", argv[i]);

+	    UseMsg();

+	    FatalError("Unrecognized option: %s\n", argv[i]);

+        }

+    }

+}

+

+/* 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(char **authorizations, int *authlen, pointer client)

+{

+#define AUTHORIZATION_NAME "hp-hostname-1"

+#if defined(TCPCONN) || defined(STREAMSCONN)

+    static char *result = NULL;

+    static char *p = NULL;

+

+    if (p == NULL)

+    {

+	char hname[1024], *hnameptr;

+	unsigned int len;

+#if defined(IPv6) && defined(AF_INET6)

+	struct addrinfo hints, *ai = NULL;

+#else

+	struct hostent *host;

+#ifdef XTHREADS_NEEDS_BYNAMEPARAMS

+	_Xgethostbynameparams hparams;

+#endif

+#endif

+

+	gethostname(hname, 1024);

+#if defined(IPv6) && defined(AF_INET6)

+	bzero(&hints, sizeof(hints));

+	hints.ai_flags = AI_CANONNAME;

+	if (getaddrinfo(hname, NULL, &hints, &ai) == 0) {

+	    hnameptr = ai->ai_canonname;

+	} else {

+	    hnameptr = hname;

+	}

+#else

+	host = _XGethostbyname(hname, hparams);

+	if (host == NULL)

+	    hnameptr = hname;

+	else

+	    hnameptr = host->h_name;

+#endif

+

+	len = strlen(hnameptr) + 1;

+	result = malloc(len + sizeof(AUTHORIZATION_NAME) + 4);

+

+	p = result;

+        *p++ = sizeof(AUTHORIZATION_NAME) >> 8;

+        *p++ = sizeof(AUTHORIZATION_NAME) & 0xff;

+        *p++ = (len) >> 8;

+        *p++ = (len & 0xff);

+

+	memmove(p, AUTHORIZATION_NAME, sizeof(AUTHORIZATION_NAME));

+	p += sizeof(AUTHORIZATION_NAME);

+	memmove(p, hnameptr, len);

+	p += len;

+#if defined(IPv6) && defined(AF_INET6)

+	if (ai) {

+	    freeaddrinfo(ai);

+	}

+#endif

+    }

+    *authlen = p - result;

+    *authorizations = result;

+    return 1;

+#else /* TCPCONN */

+    return 0;

+#endif /* TCPCONN */

+}

+

+void *

+Xalloc(unsigned long amount)

+{

+    /*

+     * Xalloc used to return NULL when large amount of memory is requested. In

+     * order to catch the buggy callers this warning has been added, slated to

+     * removal by anyone who touches this code (or just looks at it) in 2011.

+     *

+     * -- Mikhail Gusarov

+     */

+    if ((long)amount <= 0)

+	ErrorF("Warning: Xalloc: "

+	       "requesting unpleasantly large amount of memory: %lu bytes.\n",

+               amount);

+

+    return malloc(amount);

+}

+

+void *

+XNFalloc(unsigned long amount)

+{

+    void *ptr = malloc(amount);

+    if (!ptr)

+        FatalError("Out of memory");

+    return ptr;

+}

+

+void *

+Xcalloc(unsigned long amount)

+{

+    return calloc(1, amount);

+}

+

+void *

+XNFcalloc(unsigned long amount)

+{

+    void *ret = calloc(1, amount);

+    if (!ret)

+        FatalError("XNFcalloc: Out of memory");

+    return ret;

+}

+

+void *

+Xrealloc(void *ptr, unsigned long amount)

+{

+    /*

+     * Xrealloc used to return NULL when large amount of memory is requested. In

+     * order to catch the buggy callers this warning has been added, slated to

+     * removal by anyone who touches this code (or just looks at it) in 2011.

+     *

+     * -- Mikhail Gusarov

+     */

+    if ((long)amount <= 0)

+	ErrorF("Warning: Xrealloc: "

+	       "requesting unpleasantly large amount of memory: %lu bytes.\n",

+               amount);

+

+    return realloc(ptr, amount);

+}

+

+void *

+XNFrealloc(void *ptr, unsigned long amount)

+{

+    void *ret = realloc(ptr, amount);

+    if (!ret)

+	FatalError("XNFrealloc: Out of memory");

+    return ret;

+}

+

+void

+Xfree(void *ptr)

+{

+    free(ptr);

+}

+

+

+char *

+Xstrdup(const char *s)

+{

+    if (s == NULL)

+	return NULL;

+    return strdup(s);

+}

+

+char *

+XNFstrdup(const char *s)

+{

+    char *ret;

+

+    if (s == NULL)

+	return NULL;

+

+    ret = strdup(s);

+    if (!ret)

+	FatalError("XNFstrdup: Out of memory");

+    return ret;

+}

+

+

+#ifdef SIGVTALRM

+#define SMART_SCHEDULE_POSSIBLE

+#endif

+

+#ifdef SMART_SCHEDULE_POSSIBLE

+#define SMART_SCHEDULE_SIGNAL		SIGALRM

+#define SMART_SCHEDULE_TIMER		ITIMER_REAL

+#endif

+

+void

+SmartScheduleStopTimer (void)

+{

+#ifdef SMART_SCHEDULE_POSSIBLE

+    struct itimerval	timer;

+    

+    if (SmartScheduleDisable)

+	return;

+    timer.it_interval.tv_sec = 0;

+    timer.it_interval.tv_usec = 0;

+    timer.it_value.tv_sec = 0;

+    timer.it_value.tv_usec = 0;

+    (void) setitimer (ITIMER_REAL, &timer, 0);

+#endif

+}

+

+void

+SmartScheduleStartTimer (void)

+{

+#ifdef SMART_SCHEDULE_POSSIBLE

+    struct itimerval	timer;

+    

+    if (SmartScheduleDisable)

+	return;

+    timer.it_interval.tv_sec = 0;

+    timer.it_interval.tv_usec = SmartScheduleInterval * 1000;

+    timer.it_value.tv_sec = 0;

+    timer.it_value.tv_usec = SmartScheduleInterval * 1000;

+    setitimer (ITIMER_REAL, &timer, 0);

+#endif

+}

+

+#ifdef SMART_SCHEDULE_POSSIBLE

+static void

+SmartScheduleTimer (int sig)

+{

+    SmartScheduleTime += SmartScheduleInterval;

+}

+#endif

+

+Bool

+SmartScheduleInit (void)

+{

+#ifdef SMART_SCHEDULE_POSSIBLE

+    struct sigaction	act;

+

+    if (SmartScheduleDisable)

+	return TRUE;

+    

+    bzero ((char *) &act, sizeof(struct sigaction));

+

+    /* Set up the timer signal function */

+    act.sa_handler = SmartScheduleTimer;

+    sigemptyset (&act.sa_mask);

+    sigaddset (&act.sa_mask, SMART_SCHEDULE_SIGNAL);

+    if (sigaction (SMART_SCHEDULE_SIGNAL, &act, 0) < 0)

+    {

+	perror ("sigaction for smart scheduler");

+	return FALSE;

+    }

+    return TRUE;

+#else

+    return FALSE;

+#endif

+}

+

+#ifdef SIG_BLOCK

+static sigset_t	PreviousSignalMask;

+static int	BlockedSignalCount;

+#endif

+

+void

+OsBlockSignals (void)

+{

+#ifdef SIG_BLOCK

+    if (BlockedSignalCount++ == 0)

+    {

+	sigset_t    set;

+	

+	sigemptyset (&set);

+#ifdef SIGALRM

+	sigaddset (&set, SIGALRM);

+#endif

+#ifdef SIGVTALRM

+	sigaddset (&set, SIGVTALRM);

+#endif

+#ifdef SIGWINCH

+	sigaddset (&set, SIGWINCH);

+#endif

+#ifdef SIGIO

+	sigaddset (&set, SIGIO);

+#endif

+#ifdef SIGTSTP

+	sigaddset (&set, SIGTSTP);

+#endif

+#ifdef SIGTTIN

+	sigaddset (&set, SIGTTIN);

+#endif

+#ifdef SIGTTOU

+	sigaddset (&set, SIGTTOU);

+#endif

+#ifdef SIGCHLD

+	sigaddset (&set, SIGCHLD);

+#endif

+	sigprocmask (SIG_BLOCK, &set, &PreviousSignalMask);

+    }

+#endif

+}

+

+void

+OsReleaseSignals (void)

+{

+#ifdef SIG_BLOCK

+    if (--BlockedSignalCount == 0)

+    {

+	sigprocmask (SIG_SETMASK, &PreviousSignalMask, 0);

+    }

+#endif

+}

+

+/*

+ * Pending signals may interfere with core dumping. Provide a

+ * mechanism to block signals when aborting.

+ */

+

+void

+OsAbort (void)

+{

+#ifndef __APPLE__

+    OsBlockSignals();

+#endif

+    abort();

+}

+

+#if !defined(WIN32)

+/*

+ * "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.

+ *

+ * XXX It'd be good to redirect stderr so that it ends up in the log file

+ * as well.  As it is now, xkbcomp messages don't end up in the log file.

+ */

+

+int

+System(char *command)

+{

+    int pid, p;

+#ifdef SIGCHLD

+    void (*csig)(int);

+#endif

+    int status;

+

+    if (!command)

+	return(1);

+

+#ifdef SIGCHLD

+    csig = signal(SIGCHLD, SIG_DFL);

+    if (csig == SIG_ERR) {

+      perror("signal");

+      return -1;

+    }

+#endif

+

+#ifdef DEBUG

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

+#endif

+

+    switch (pid = fork()) {

+    case -1:	/* error */

+	p = -1;

+    case 0:	/* child */

+	if (setgid(getgid()) == -1)

+	    _exit(127);

+	if (setuid(getuid()) == -1)

+	    _exit(127);

+	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

+    if (signal(SIGCHLD, csig) == SIG_ERR) {

+      perror("signal");

+      return -1;

+    }

+#endif

+

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

+}

+

+static struct pid {

+    struct pid *next;

+    FILE *fp;

+    int pid;

+} *pidlist;

+

+OsSigHandlerPtr old_alarm = NULL; /* XXX horrible awful hack */

+

+pointer

+Popen(char *command, char *type)

+{

+    struct pid *cur;

+    FILE *iop;

+    int pdes[2], pid;

+

+    if (command == NULL || type == NULL)

+	return NULL;

+

+    if ((*type != 'r' && *type != 'w') || type[1])

+	return NULL;

+

+    if ((cur = malloc(sizeof(struct pid))) == NULL)

+	return NULL;

+

+    if (pipe(pdes) < 0) {

+	free(cur);

+	return NULL;

+    }

+

+    /* Ignore the smart scheduler while this is going on */

+    old_alarm = OsSignal(SIGALRM, SIG_IGN);

+    if (old_alarm == SIG_ERR) {

+      perror("signal");

+      return NULL;

+    }

+

+    switch (pid = fork()) {

+    case -1: 	/* error */

+	close(pdes[0]);

+	close(pdes[1]);

+	free(cur);

+	if (OsSignal(SIGALRM, old_alarm) == SIG_ERR)

+	  perror("signal");

+	return NULL;

+    case 0:	/* child */

+	if (setgid(getgid()) == -1)

+	    _exit(127);

+	if (setuid(getuid()) == -1)

+	    _exit(127);

+	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);

+    }

+

+    /* Avoid EINTR during stdio calls */

+    OsBlockSignals ();

+    

+    /* 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;

+

+#ifdef DEBUG

+    ErrorF("Popen: `%s', fp = %p\n", command, iop);

+#endif

+

+    return iop;

+}

+

+/* fopen that drops privileges */

+pointer

+Fopen(char *file, char *type)

+{

+    FILE *iop;

+#ifndef HAS_SAVED_IDS_AND_SETEUID

+    struct pid *cur;

+    int pdes[2], pid;

+

+    if (file == NULL || type == NULL)

+	return NULL;

+

+    if ((*type != 'r' && *type != 'w') || type[1])

+	return NULL;

+

+    if ((cur = malloc(sizeof(struct pid))) == NULL)

+	return NULL;

+

+    if (pipe(pdes) < 0) {

+	free(cur);

+	return NULL;

+    }

+

+    switch (pid = fork()) {

+    case -1: 	/* error */

+	close(pdes[0]);

+	close(pdes[1]);

+	free(cur);

+	return NULL;

+    case 0:	/* child */

+	if (setgid(getgid()) == -1)

+	    _exit(127);

+	if (setuid(getuid()) == -1)

+	    _exit(127);

+	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/cat", "cat", file, (char *)NULL);

+	_exit(127);

+    }

+

+    /* Avoid EINTR during stdio calls */

+    OsBlockSignals ();

+    

+    /* 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;

+

+#ifdef DEBUG

+    ErrorF("Fopen(%s), fp = %p\n", file, iop);

+#endif

+

+    return iop;

+#else

+    int ruid, euid;

+

+    ruid = getuid();

+    euid = geteuid();

+    

+    if (seteuid(ruid) == -1) {

+	    return NULL;

+    }

+    iop = fopen(file, type);

+

+    if (seteuid(euid) == -1) {

+	    fclose(iop);

+	    return NULL;

+    }

+    return iop;

+#endif /* HAS_SAVED_IDS_AND_SETEUID */

+}

+

+int

+Pclose(pointer iop)

+{

+    struct pid *cur, *last;

+    int pstat;

+    int pid;

+

+#ifdef DEBUG

+    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;

+    free(cur);

+

+    /* allow EINTR again */

+    OsReleaseSignals ();

+    

+    if (old_alarm && OsSignal(SIGALRM, old_alarm) == SIG_ERR) {

+      perror("signal");

+      return -1;

+    }

+

+    return pid == -1 ? -1 : pstat;

+}

+

+int

+Fclose(pointer iop)

+{

+#ifdef HAS_SAVED_IDS_AND_SETEUID

+    return fclose(iop);

+#else

+    return Pclose(iop);

+#endif

+}

+

+#endif /* !WIN32 */

+

+

+/*

+ * CheckUserParameters: check for long command line arguments and long

+ * environment variables.  By default, these checks are only done when

+ * the server's euid != ruid.  In 3.3.x, these checks were done in an

+ * external wrapper utility.

+ */

+

+/* Consider LD* variables insecure? */

+#ifndef REMOVE_ENV_LD

+#define REMOVE_ENV_LD 1

+#endif

+

+/* Remove long environment variables? */

+#ifndef REMOVE_LONG_ENV

+#define REMOVE_LONG_ENV 1

+#endif

+

+/*

+ * Disallow stdout or stderr as pipes?  It's possible to block the X server

+ * when piping stdout+stderr to a pipe.

+ *

+ * Don't enable this because it looks like it's going to cause problems.

+ */

+#ifndef NO_OUTPUT_PIPES

+#define NO_OUTPUT_PIPES 0

+#endif

+

+

+/* Check args and env only if running setuid (euid == 0 && euid != uid) ? */

+#ifndef CHECK_EUID

+#ifndef WIN32

+#define CHECK_EUID 1

+#else

+#define CHECK_EUID 0

+#endif

+#endif

+

+/*

+ * Maybe the locale can be faked to make isprint(3) report that everything

+ * is printable?  Avoid it by default.

+ */

+#ifndef USE_ISPRINT

+#define USE_ISPRINT 0

+#endif

+

+#define MAX_ARG_LENGTH          128

+#define MAX_ENV_LENGTH          256

+#define MAX_ENV_PATH_LENGTH     2048	/* Limit for *PATH and TERMCAP */

+

+#if USE_ISPRINT

+#include <ctype.h>

+#define checkPrintable(c) isprint(c)

+#else

+#define checkPrintable(c) (((c) & 0x7f) >= 0x20 && ((c) & 0x7f) != 0x7f)

+#endif

+

+enum BadCode {

+    NotBad = 0,

+    UnsafeArg,

+    ArgTooLong,

+    UnprintableArg,

+    EnvTooLong,

+    OutputIsPipe,

+    InternalError

+};

+

+#if defined(VENDORSUPPORT)

+#define BUGADDRESS VENDORSUPPORT

+#elif defined(BUILDERADDR)

+#define BUGADDRESS BUILDERADDR

+#else

+#define BUGADDRESS "xorg@freedesktop.org"

+#endif

+

+void

+CheckUserParameters(int argc, char **argv, char **envp)

+{

+    enum BadCode bad = NotBad;

+    int i = 0, j;

+    char *a, *e = NULL;

+

+#if CHECK_EUID

+    if (geteuid() == 0 && getuid() != geteuid())

+#endif

+    {

+	/* Check each argv[] */

+	for (i = 1; i < argc; i++) {

+	    if (strcmp(argv[i], "-fp") == 0)

+	    {

+		i++; /* continue with next argument. skip the length check */

+		if (i >= argc)

+		    break;

+	    } else

+	    {

+		if (strlen(argv[i]) > MAX_ARG_LENGTH) {

+		    bad = ArgTooLong;

+		    break;

+		}

+	    }

+	    a = argv[i];

+	    while (*a) {

+		if (checkPrintable(*a) == 0) {

+		    bad = UnprintableArg;

+		    break;

+		}

+		a++;

+	    }

+	    if (bad)

+		break;

+	}

+	if (!bad) {

+	    /* Check each envp[] */

+	    for (i = 0; envp[i]; i++) {

+

+		/* Check for bad environment variables and values */

+#if REMOVE_ENV_LD

+		while (envp[i] && (strncmp(envp[i], "LD", 2) == 0)) {

+		    for (j = i; envp[j]; j++) {

+			envp[j] = envp[j+1];

+		    }

+		}

+#endif   

+		if (envp[i] && (strlen(envp[i]) > MAX_ENV_LENGTH)) {

+#if REMOVE_LONG_ENV

+		    for (j = i; envp[j]; j++) {

+			envp[j] = envp[j+1];

+		    }

+		    i--;

+#else

+		    char *eq;

+		    int len;

+

+		    eq = strchr(envp[i], '=');

+		    if (!eq)

+			continue;

+		    len = eq - envp[i];

+		    e = malloc(len + 1);

+		    if (!e) {

+			bad = InternalError;

+			break;

+		    }

+		    strncpy(e, envp[i], len);

+		    e[len] = 0;

+		    if (len >= 4 &&

+			(strcmp(e + len - 4, "PATH") == 0 ||

+			 strcmp(e, "TERMCAP") == 0)) {

+			if (strlen(envp[i]) > MAX_ENV_PATH_LENGTH) {

+			    bad = EnvTooLong;

+			    break;

+			} else {

+			    free(e);

+			}

+		    } else {

+			bad = EnvTooLong;

+			break;

+		    }

+#endif

+		}

+	    }

+	}

+#if NO_OUTPUT_PIPES

+	if (!bad) {

+	    struct stat buf;

+

+	    if (fstat(fileno(stdout), &buf) == 0 && S_ISFIFO(buf.st_mode))

+		bad = OutputIsPipe;

+	    if (fstat(fileno(stderr), &buf) == 0 && S_ISFIFO(buf.st_mode))

+		bad = OutputIsPipe;

+	}

+#endif

+    }

+    switch (bad) {

+    case NotBad:

+	return;

+    case UnsafeArg:

+	ErrorF("Command line argument number %d is unsafe\n", i);

+	break;

+    case ArgTooLong:

+	ErrorF("Command line argument number %d is too long\n", i);

+	break;

+    case UnprintableArg:

+	ErrorF("Command line argument number %d contains unprintable"

+		" characters\n", i);

+	break;

+    case EnvTooLong:

+	ErrorF("Environment variable `%s' is too long\n", e);

+	break;

+    case OutputIsPipe:

+	ErrorF("Stdout and/or stderr is a pipe\n");

+	break;

+    case InternalError:

+	ErrorF("Internal Error\n");

+	break;

+    default:

+	ErrorF("Unknown error\n");

+	break;

+    }

+    FatalError("X server aborted because of unsafe environment\n");

+}

+

+/*

+ * CheckUserAuthorization: check if the user is allowed to start the

+ * X server.  This usually means some sort of PAM checking, and it is

+ * usually only done for setuid servers (uid != euid).

+ */

+

+#ifdef USE_PAM

+#include <security/pam_appl.h>

+#include <security/pam_misc.h>

+#include <pwd.h>

+#endif /* USE_PAM */

+

+void

+CheckUserAuthorization(void)

+{

+#ifdef USE_PAM

+    static struct pam_conv conv = {

+	misc_conv,

+	NULL

+    };

+

+    pam_handle_t *pamh = NULL;

+    struct passwd *pw;

+    int retval;

+

+    if (getuid() != geteuid()) {

+	pw = getpwuid(getuid());

+	if (pw == NULL)

+	    FatalError("getpwuid() failed for uid %d\n", getuid());

+

+	retval = pam_start("xserver", pw->pw_name, &conv, &pamh);

+	if (retval != PAM_SUCCESS)

+	    FatalError("pam_start() failed.\n"

+			"\tMissing or mangled PAM config file or module?\n");

+

+	retval = pam_authenticate(pamh, 0);

+	if (retval != PAM_SUCCESS) {

+	    pam_end(pamh, retval);

+	    FatalError("PAM authentication failed, cannot start X server.\n"

+			"\tPerhaps you do not have console ownership?\n");

+	}

+

+	retval = pam_acct_mgmt(pamh, 0);

+	if (retval != PAM_SUCCESS) {

+	    pam_end(pamh, retval);

+	    FatalError("PAM authentication failed, cannot start X server.\n"

+			"\tPerhaps you do not have console ownership?\n");

+	}

+

+	/* this is not a session, so do not do session management */

+	pam_end(pamh, PAM_SUCCESS);

+    }

+#endif

+}

+

+/*

+ * Tokenize a string into a NULL terminated array of strings. Always returns

+ * an allocated array unless an error occurs.

+ */

+char**

+xstrtokenize(const char *str, const char *separators)

+{

+    char **list, **nlist;

+    char *tok, *tmp;

+    unsigned num = 0, n;

+

+    if (!str)

+        return NULL;

+    list = calloc(1, sizeof(*list));

+    if (!list)

+        return NULL;

+    tmp = strdup(str);

+    if (!tmp)

+        goto error;

+    for (tok = strtok(tmp, separators); tok; tok = strtok(NULL, separators)) {

+        nlist = realloc(list, (num + 2) * sizeof(*list));

+        if (!nlist)

+            goto error;

+        list = nlist;

+        list[num] = strdup(tok);

+        if (!list[num])

+            goto error;

+        list[++num] = NULL;

+    }

+    free(tmp);

+    return list;

+

+error:

+    free(tmp);

+    for (n = 0; n < num; n++)

+        free(list[n]);

+    free(list);

+    return NULL;

+}

+

+#ifdef __SCO__

+#include <fcntl.h>

+

+static void

+lockit (int fd, short what)

+{

+  struct flock lck;

+

+  lck.l_whence = 0;

+  lck.l_start = 0;

+  lck.l_len = 1;

+  lck.l_type = what;

+

+  (void)fcntl (fd, F_SETLKW, &lck);

+}

+

+/* SCO OpenServer 5 lacks pread/pwrite. Emulate them. */

+ssize_t

+pread (int fd, void *buf, size_t nbytes, off_t offset)

+{

+  off_t saved;

+  ssize_t ret;

+

+  lockit (fd, F_RDLCK);

+  saved = lseek (fd, 0, SEEK_CUR);

+  lseek (fd, offset, SEEK_SET);

+  ret = read (fd, buf, nbytes);

+  lseek (fd, saved, SEEK_SET);

+  lockit (fd, F_UNLCK);

+

+  return ret;

+}

+

+ssize_t

+pwrite (int fd, const void *buf, size_t nbytes, off_t offset)

+{

+  off_t saved;

+  ssize_t ret;

+

+  lockit (fd, F_WRLCK);

+  saved = lseek (fd, 0, SEEK_CUR);

+  lseek (fd, offset, SEEK_SET);

+  ret = write (fd, buf, nbytes);

+  lseek (fd, saved, SEEK_SET);

+  lockit (fd, F_UNLCK);

+

+  return ret;

+}

+#endif /* __SCO__ */