xserver

utils.c (58181B)

---

 /*
 
 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 <X11/fonts/libxfont2.h>
 #include "osdep.h"
 #include "extension.h"
 #include <signal.h>
 #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)
 #ifndef WIN32
 #include <netdb.h>
 #endif
 #endif
 
 #include "opaque.h"
 
 #include "dixstruct.h"
 
 #include "xkbsrv.h"
 
 #include "picture.h"
 
 #include "miinitext.h"
 
 #include "present.h"
 
 Bool noTestExtensions;
 
 #ifdef COMPOSITE
 Bool noCompositeExtension = FALSE;
 #endif
 
 #ifdef DAMAGE
 Bool noDamageExtension = FALSE;
 #endif
 #ifdef DBE
 Bool noDbeExtension = FALSE;
 #endif
 #ifdef DPMSExtension
 #include "dpmsproc.h"
 Bool noDPMSExtension = FALSE;
 #endif
 #ifdef GLXEXT
 Bool noGlxExtension = 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
 Bool noXFixesExtension = FALSE;
 #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;
 
 Bool enableIndirectGLX = FALSE;
 
 #ifdef PANORAMIX
 Bool PanoramiXExtensionDisabledHack = FALSE;
 #endif
 
 int auditTrailLevel = 1;
 
 char *SeatId = NULL;
 
 sig_atomic_t inSignalContext = FALSE;
 
 #if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
 #define HAS_SAVED_IDS_AND_SETEUID
 #endif
 
 #ifdef MONOTONIC_CLOCK
 static clockid_t clockid;
 #endif
 
 OsSigHandlerPtr
 OsSignal(int sig, OsSigHandlerPtr handler)
 {
 #if defined(WIN32) && !defined(__CYGWIN__)
     return signal(sig, handler);
 #else
     struct sigaction act, oact;
 
     sigemptyset(&act.sa_mask);
     if (handler != SIG_IGN)
         sigaddset(&act.sa_mask, sig);
     act.sa_flags = 0;
     act.sa_handler = handler;
     if (sigaction(sig, &act, &oact))
         perror("sigaction");
     return oact.sa_handler;
 #endif
 }
 
 /*
  * 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"
 
 #if !defined(WIN32) || defined(__CYGWIN__)
 #define LOCK_SERVER
 #endif
 
 #ifndef LOCK_SERVER
 void
 LockServer(void)
 {}
 
 void
 UnlockServer(void)
 {}
 #else /* LOCK_SERVER */
 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;
     const char *tmppath = LOCK_DIR;
     int len;
     char port[20];
 
     if (nolock || NoListenAll)
         return;
     /*
      * Path names
      */
     snprintf(port, sizeof(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);
     snprintf(pid_str, sizeof(pid_str), "%10lu\n", (unsigned long) getpid());
     if (write(lfd, pid_str, 11) != 11)
         FatalError("Could not write pid to lock file in %s\n", tmp);
     (void) fchmod(lfd, 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 if (errno == EEXIST) {
             /*
              * Read the pid from the existing file
              */
             lfd = open(LockFile, O_RDONLY | O_NOFOLLOW);
             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.");
             }
         }
         else {
             unlink(tmp);
             FatalError
                 ("Linking lock file (%s) in place failed: %s\n",
                  LockFile, strerror(errno));
         }
     }
     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 || NoListenAll)
         return;
 
     if (!StillLocking) {
 
         (void) unlink(LockFile);
     }
 }
 #endif /* LOCK_SERVER */
 
 /* 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;
 }
 
 #ifdef MONOTONIC_CLOCK
 void
 ForceClockId(clockid_t forced_clockid)
 {
     struct timespec tp;
 
     BUG_RETURN (clockid);
 
     clockid = forced_clockid;
 
     if (clock_gettime(clockid, &tp) != 0) {
         FatalError("Forced clock id failed to retrieve current time: %s\n",
                    strerror(errno));
         return;
     }
 }
 #endif
 
 #if (defined WIN32 && defined __MINGW32__) || defined(__CYGWIN__)
 CARD32
 GetTimeInMillis(void)
 {
     return GetTickCount();
 }
 CARD64
 GetTimeInMicros(void)
 {
     return (CARD64) GetTickCount() * 1000;
 }
 #else
 CARD32
 GetTimeInMillis(void)
 {
     struct timeval tv;
 
 #ifdef MONOTONIC_CLOCK
     struct timespec tp;
 
     if (!clockid) {
 #ifdef CLOCK_MONOTONIC_COARSE
         if (clock_getres(CLOCK_MONOTONIC_COARSE, &tp) == 0 &&
             (tp.tv_nsec / 1000) <= 1000 &&
             clock_gettime(CLOCK_MONOTONIC_COARSE, &tp) == 0)
             clockid = CLOCK_MONOTONIC_COARSE;
         else
 #endif
         if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
             clockid = CLOCK_MONOTONIC;
         else
             clockid = ~0L;
     }
     if (clockid != ~0L && clock_gettime(clockid, &tp) == 0)
         return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L);
 #endif
 
     X_GETTIMEOFDAY(&tv);
     return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
 }
 
 CARD64
 GetTimeInMicros(void)
 {
     struct timeval tv;
 #ifdef MONOTONIC_CLOCK
     struct timespec tp;
     static clockid_t uclockid;
 
     if (!uclockid) {
         if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
             uclockid = CLOCK_MONOTONIC;
         else
             uclockid = ~0L;
     }
     if (uclockid != ~0L && clock_gettime(uclockid, &tp) == 0)
         return (CARD64) tp.tv_sec * (CARD64)1000000 + tp.tv_nsec / 1000;
 #endif
 
     X_GETTIMEOFDAY(&tv);
     return (CARD64) tv.tv_sec * (CARD64)1000000 + (CARD64) tv.tv_usec;
 }
 #endif
 
 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("-displayfd fd          file descriptor to write display number to when ready to connect\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("-fakescreenfps #       fake screen default fps (1-600)\n");
     ErrorF("-fp string             default font path\n");
     ErrorF("-help                  prints message with these options\n");
     ErrorF("+iglx                  Allow creating indirect GLX contexts\n");
     ErrorF("-iglx                  Prohibit creating indirect GLX contexts (default)\n");
     ErrorF("-I                     ignore all remaining arguments\n");
 #ifdef RLIMIT_DATA
     ErrorF("-ld int                limit data space to N Kb\n");
 #endif
 #ifdef RLIMIT_NOFILE
     ErrorF("-lf int                limit number of open files to N\n");
 #endif
 #ifdef RLIMIT_STACK
     ErrorF("-ls int                limit stack space to N Kb\n");
 #endif
 #ifdef LOCK_SERVER
     ErrorF("-nolock                disable the locking mechanism\n");
 #endif
     ErrorF("-maxclients n          set maximum number of clients (power of two)\n");
     ErrorF("-nolisten string       don't listen on protocol\n");
     ErrorF("-listen string         listen on protocol\n");
     ErrorF("-noreset               don't reset after last client exists\n");
     ErrorF("-background [none]     create root window with no background\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("-seat string           seat to run on\n");
     ErrorF("-t #                   default pointer threshold (pixels/t)\n");
     ErrorF("-terminate [delay]     terminate at server reset (optional delay in sec)\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("-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 and threaded input, enable old behavior\n");
     ErrorF("-schedInterval int     Set scheduler interval in msec\n");
     ErrorF("-sigstop               Enable SIGSTOP based startup\n");
     ErrorF("+extension name        Enable extension\n");
     ErrorF("-extension name        Disable extension\n");
     ListStaticExtensions();
 #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)
 {
     int i;
     int period_found = FALSE;
     int after_period = 0;
 
     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!!!  */
 
     /* Since we run atoi() on the display later, only allow
        for digits, or exception of :0.0 and similar (two decimal points max)
        */
     for (i = 0; i < strlen(d); i++) {
         if (!isdigit(d[i])) {
             if (d[i] != '.' || period_found)
                 return 0;
             period_found = TRUE;
         } else if (period_found)
             after_period++;
 
         if (after_period > 2)
             return 0;
     }
 
     /* don't allow for :0. */
     if (period_found && after_period == 0)
         return 0;
 
     if (atol(d) > INT_MAX)
         return 0;
 
     return 1;
 }
 
 static const char *defaultNoListenList[] = {
 #ifndef LISTEN_TCP
     "tcp",
 #endif
 #ifndef LISTEN_UNIX
     "unix",
 #endif
 #ifndef LISTEN_LOCAL
     "local",
 #endif
     NULL
 };
 
 /*
  * 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 = 0; defaultNoListenList[i] != NULL; i++) {
         if (_XSERVTransNoListen(defaultNoListenList[i]))
                     ErrorF("Failed to disable listen for %s transport",
                            defaultNoListenList[i]);
     }
     SeatId = getenv("XDG_SEAT");
 
     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];
             explicit_display = TRUE;
             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();
         }
         else if (strcmp(argv[i], "-displayfd") == 0) {
             if (++i < argc) {
                 displayfd = atoi(argv[i]);
 #ifdef LOCK_SERVER
                 nolock = TRUE;
 #endif
             }
             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 || !xfont2_parse_glyph_caching_mode(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], "-fakescreenfps") == 0) {
             if (++i < argc) {
                 FakeScreenFps = (uint32_t) atoi(argv[i]);
                 if (FakeScreenFps < 1 || FakeScreenFps > 600)
                     FatalError("fakescreenfps must be an integer in [1;600] range\n");
             }
             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 (strcmp(argv[i], "+iglx") == 0)
             enableIndirectGLX = TRUE;
         else if (strcmp(argv[i], "-iglx") == 0)
             enableIndirectGLX = FALSE;
         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
 #ifdef LOCK_SERVER
         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;
         }
 #endif
 	else if ( strcmp( argv[i], "-maxclients") == 0)
 	{
 	    if (++i < argc) {
 		LimitClients = atoi(argv[i]);
 		if (LimitClients != 64 &&
 		    LimitClients != 128 &&
 		    LimitClients != 256 &&
 		    LimitClients != 512 &&
                     LimitClients != 1024 &&
                     LimitClients != 2048) {
 		    FatalError("maxclients must be one of 64, 128, 256, 512, 1024 or 2048\n");
 		}
 	    } else
 		UseMsg();
 	}
         else if (strcmp(argv[i], "-nolisten") == 0) {
             if (++i < argc) {
                 if (_XSERVTransNoListen(argv[i]))
                     ErrorF("Failed to disable listen for %s transport",
                            argv[i]);
             }
             else
                 UseMsg();
         }
         else if (strcmp(argv[i], "-listen") == 0) {
             if (++i < argc) {
                 if (_XSERVTransListen(argv[i]))
                     ErrorF("Failed to enable 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], "-seat") == 0) {
             if (++i < argc)
                 SeatId = argv[i];
             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;
             terminateDelay = -1;
             if ((i + 1 < argc) && (isdigit(*argv[i + 1])))
                terminateDelay = atoi(argv[++i]);
             terminateDelay = max(0, terminateDelay);
         }
         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], "-wr") == 0)
             whiteRoot = TRUE;
         else if (strcmp(argv[i], "-background") == 0) {
             if (++i < argc) {
                 if (!strcmp(argv[i], "none"))
                     bgNoneRoot = TRUE;
                 else
                     UseMsg();
             }
         }
         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) {
             /* init supplies us with this useless information */
         }
 #ifdef XDMCP
         else if ((skip = XdmcpOptions(argc, argv, i)) != i) {
             i = skip - 1;
         }
 #endif
         else if (strcmp(argv[i], "-dumbSched") == 0) {
             InputThreadEnable = FALSE;
 #ifdef HAVE_SETITIMER
             SmartScheduleSignalEnable = FALSE;
 #endif
         }
         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], "-sigstop") == 0) {
             RunFromSigStopParent = TRUE;
         }
         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, void *client)
 {
 #define AUTHORIZATION_NAME "hp-hostname-1"
 #if defined(TCPCONN)
     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)
         memset(&hints, 0, 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 *
 XNFalloc(unsigned long amount)
 {
     void *ptr = malloc(amount);
 
     if (!ptr)
         FatalError("Out of memory");
     return ptr;
 }
 
 /* The original XNFcalloc was used with the xnfcalloc macro which multiplied
  * the arguments at the call site without allowing calloc to check for overflow.
  * XNFcallocarray was added to fix that without breaking ABI.
  */
 void *
 XNFcalloc(unsigned long amount)
 {
     return XNFcallocarray(1, amount);
 }
 
 void *
 XNFcallocarray(size_t nmemb, size_t size)
 {
     void *ret = calloc(nmemb, size);
 
     if (!ret)
         FatalError("XNFcalloc: Out of memory");
     return ret;
 }
 
 void *
 XNFrealloc(void *ptr, unsigned long amount)
 {
     void *ret = realloc(ptr, amount);
 
     if (!ret)
         FatalError("XNFrealloc: Out of memory");
     return ret;
 }
 
 void *
 XNFreallocarray(void *ptr, size_t nmemb, size_t size)
 {
     void *ret = reallocarray(ptr, nmemb, size);
 
     if (!ret)
         FatalError("XNFreallocarray: Out of memory");
     return ret;
 }
 
 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;
 }
 
 void
 SmartScheduleStopTimer(void)
 {
 #ifdef HAVE_SETITIMER
     struct itimerval timer;
 
     if (!SmartScheduleSignalEnable)
         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 HAVE_SETITIMER
     struct itimerval timer;
 
     if (!SmartScheduleSignalEnable)
         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 HAVE_SETITIMER
 static void
 SmartScheduleTimer(int sig)
 {
     SmartScheduleTime += SmartScheduleInterval;
 }
 
 static int
 SmartScheduleEnable(void)
 {
     int ret = 0;
     struct sigaction act;
 
     if (!SmartScheduleSignalEnable)
         return 0;
 
     memset((char *) &act, 0, sizeof(struct sigaction));
 
     /* Set up the timer signal function */
     act.sa_flags = SA_RESTART;
     act.sa_handler = SmartScheduleTimer;
     sigemptyset(&act.sa_mask);
     sigaddset(&act.sa_mask, SIGALRM);
     ret = sigaction(SIGALRM, &act, 0);
     return ret;
 }
 
 static int
 SmartSchedulePause(void)
 {
     int ret = 0;
     struct sigaction act;
 
     if (!SmartScheduleSignalEnable)
         return 0;
 
     memset((char *) &act, 0, sizeof(struct sigaction));
 
     act.sa_handler = SIG_IGN;
     sigemptyset(&act.sa_mask);
     ret = sigaction(SIGALRM, &act, 0);
     return ret;
 }
 #endif
 
 void
 SmartScheduleInit(void)
 {
 #ifdef HAVE_SETITIMER
     if (SmartScheduleEnable() < 0) {
         perror("sigaction for smart scheduler");
         SmartScheduleSignalEnable = FALSE;
     }
 #endif
 }
 
 #ifdef HAVE_SIGPROCMASK
 static sigset_t PreviousSignalMask;
 static int BlockedSignalCount;
 #endif
 
 void
 OsBlockSignals(void)
 {
 #ifdef HAVE_SIGPROCMASK
     if (BlockedSignalCount++ == 0) {
         sigset_t set;
 
         sigemptyset(&set);
         sigaddset(&set, SIGALRM);
         sigaddset(&set, SIGVTALRM);
 #ifdef SIGWINCH
         sigaddset(&set, SIGWINCH);
 #endif
         sigaddset(&set, SIGTSTP);
         sigaddset(&set, SIGTTIN);
         sigaddset(&set, SIGTTOU);
         sigaddset(&set, SIGCHLD);
         xthread_sigmask(SIG_BLOCK, &set, &PreviousSignalMask);
     }
 #endif
 }
 
 void
 OsReleaseSignals(void)
 {
 #ifdef HAVE_SIGPROCMASK
     if (--BlockedSignalCount == 0) {
         xthread_sigmask(SIG_SETMASK, &PreviousSignalMask, 0);
     }
 #endif
 }
 
 void
 OsResetSignals(void)
 {
 #ifdef HAVE_SIGPROCMASK
     while (BlockedSignalCount > 0)
         OsReleaseSignals();
     input_force_unlock();
 #endif
 }
 
 /*
  * Pending signals may interfere with core dumping. Provide a
  * mechanism to block signals when aborting.
  */
 
 void
 OsAbort(void)
 {
 #ifndef __APPLE__
     OsBlockSignals();
 #endif
 #if !defined(WIN32) || defined(__CYGWIN__)
     /* abort() raises SIGABRT, so we have to stop handling that to prevent
      * recursion
      */
     OsSignal(SIGABRT, SIG_DFL);
 #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(const char *command)
 {
     int pid, p;
     void (*csig) (int);
     int status;
 
     if (!command)
         return 1;
 
     csig = OsSignal(SIGCHLD, SIG_DFL);
     if (csig == SIG_ERR) {
         perror("signal");
         return -1;
     }
     DebugF("System: `%s'\n", command);
 
     switch (pid = fork()) {
     case -1:                   /* error */
         p = -1;
         break;
     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);
 
     }
 
     if (OsSignal(SIGCHLD, csig) == SIG_ERR) {
         perror("signal");
         return -1;
     }
 
     return p == -1 ? -1 : status;
 }
 
 static struct pid {
     struct pid *next;
     FILE *fp;
     int pid;
 } *pidlist;
 
 void *
 Popen(const char *command, const 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 */
 #ifdef HAVE_SETITIMER
     if (SmartSchedulePause() < 0) {
         close(pdes[0]);
         close(pdes[1]);
         free(cur);
         perror("signal");
         return NULL;
     }
 #endif
 
     switch (pid = fork()) {
     case -1:                   /* error */
         close(pdes[0]);
         close(pdes[1]);
         free(cur);
 #ifdef HAVE_SETITIMER
         if (SmartScheduleEnable() < 0)
             perror("signal");
 #endif
         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;
 
     DebugF("Popen: `%s', fp = %p\n", command, iop);
 
     return iop;
 }
 
 /* fopen that drops privileges */
 void *
 Fopen(const char *file, const 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;
 
     DebugF("Fopen(%s), fp = %p\n", file, iop);
 
     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(void *iop)
 {
     struct pid *cur, *last;
     int pstat;
     int pid;
 
     DebugF("Pclose: fp = %p\n", iop);
     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();
 
 #ifdef HAVE_SETITIMER
     if (SmartScheduleEnable() < 0) {
         perror("signal");
         return -1;
     }
 #endif
 
     return pid == -1 ? -1 : pstat;
 }
 
 int
 Fclose(void *iop)
 {
 #ifdef HAS_SAVED_IDS_AND_SETEUID
     return fclose(iop);
 #else
     return Pclose(iop);
 #endif
 }
 
 #endif                          /* !WIN32 */
 
 #ifdef WIN32
 
 #include <X11/Xwindows.h>
 
 const char *
 Win32TempDir(void)
 {
     static char buffer[PATH_MAX];
 
     if (GetTempPath(sizeof(buffer), buffer)) {
         int len;
 
         buffer[sizeof(buffer) - 1] = 0;
         len = strlen(buffer);
         if (len > 0)
             if (buffer[len - 1] == '\\')
                 buffer[len - 1] = 0;
         return buffer;
     }
     if (getenv("TEMP") != NULL)
         return getenv("TEMP");
     else if (getenv("TMP") != NULL)
         return getenv("TMP");
     else
         return "/tmp";
 }
 
 int
 System(const char *cmdline)
 {
     STARTUPINFO si;
     PROCESS_INFORMATION pi;
     DWORD dwExitCode;
     char *cmd = strdup(cmdline);
 
     ZeroMemory(&si, sizeof(si));
     si.cb = sizeof(si);
     ZeroMemory(&pi, sizeof(pi));
 
     if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) {
         LPVOID buffer;
 
         if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                            FORMAT_MESSAGE_FROM_SYSTEM |
                            FORMAT_MESSAGE_IGNORE_INSERTS,
                            NULL,
                            GetLastError(),
                            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                            (LPTSTR) &buffer, 0, NULL)) {
             ErrorF("[xkb] Starting '%s' failed!\n", cmdline);
         }
         else {
             ErrorF("[xkb] Starting '%s' failed: %s", cmdline, (char *) buffer);
             LocalFree(buffer);
         }
 
         free(cmd);
         return -1;
     }
     /* Wait until child process exits. */
     WaitForSingleObject(pi.hProcess, INFINITE);
 
     GetExitCodeProcess(pi.hProcess, &dwExitCode);
 
     /* Close process and thread handles. */
     CloseHandle(pi.hProcess);
     CloseHandle(pi.hThread);
     free(cmd);
 
     return dwExitCode;
 }
 #endif
 
 Bool
 PrivsElevated(void)
 {
     static Bool privsTested = FALSE;
     static Bool privsElevated = TRUE;
 
     if (!privsTested) {
 #if defined(WIN32)
         privsElevated = FALSE;
 #else
         if ((getuid() != geteuid()) || (getgid() != getegid())) {
             privsElevated = TRUE;
         }
         else {
 #if defined(HAVE_ISSETUGID)
             privsElevated = issetugid();
 #elif defined(HAVE_GETRESUID)
             uid_t ruid, euid, suid;
             gid_t rgid, egid, sgid;
 
             if ((getresuid(&ruid, &euid, &suid) == 0) &&
                 (getresgid(&rgid, &egid, &sgid) == 0)) {
                 privsElevated = (euid != suid) || (egid != sgid);
             }
             else {
                 printf("Failed getresuid or getresgid");
                 /* Something went wrong, make defensive assumption */
                 privsElevated = TRUE;
             }
 #else
             if (getuid() == 0) {
                 /* running as root: uid==euid==0 */
                 privsElevated = FALSE;
             }
             else {
                 /*
                  * If there are saved ID's the process might still be privileged
                  * even though the above test succeeded. If issetugid() and
                  * getresgid() aren't available, test this by trying to set
                  * euid to 0.
                  */
                 unsigned int oldeuid;
 
                 oldeuid = geteuid();
 
                 if (seteuid(0) != 0) {
                     privsElevated = FALSE;
                 }
                 else {
                     if (seteuid(oldeuid) != 0) {
                         FatalError("Failed to drop privileges.  Exiting\n");
                     }
                     privsElevated = TRUE;
                 }
             }
 #endif
         }
 #endif
         privsTested = TRUE;
     }
     return privsElevated;
 }
 
 /*
  * 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 (PrivsElevated())
 #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 = strndup(envp[i], len);
                     if (!e) {
                         bad = InternalError;
                         break;
                     }
                     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 = reallocarray(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;
 }
 
 /* Format a signed number into a string in a signal safe manner. The string
  * should be at least 21 characters in order to handle all int64_t values.
  */
 void
 FormatInt64(int64_t num, char *string)
 {
     if (num < 0) {
         string[0] = '-';
         num *= -1;
         string++;
     }
     FormatUInt64(num, string);
 }
 
 /* Format a number into a string in a signal safe manner. The string should be
  * at least 21 characters in order to handle all uint64_t values. */
 void
 FormatUInt64(uint64_t num, char *string)
 {
     uint64_t divisor;
     int len;
     int i;
 
     for (len = 1, divisor = 10;
          len < 20 && num / divisor;
          len++, divisor *= 10);
 
     for (i = len, divisor = 1; i > 0; i--, divisor *= 10)
         string[i - 1] = '0' + ((num / divisor) % 10);
 
     string[len] = '\0';
 }
 
 /**
  * Format a double number as %.2f.
  */
 void
 FormatDouble(double dbl, char *string)
 {
     int slen = 0;
     uint64_t frac;
 
     frac = (dbl > 0 ? dbl : -dbl) * 100.0 + 0.5;
     frac %= 100;
 
     /* write decimal part to string */
     if (dbl < 0 && dbl > -1)
         string[slen++] = '-';
     FormatInt64((int64_t)dbl, &string[slen]);
 
     while(string[slen] != '\0')
         slen++;
 
     /* append fractional part, but only if we have enough characters. We
      * expect string to be 21 chars (incl trailing \0) */
     if (slen <= 17) {
         string[slen++] = '.';
         if (frac < 10)
             string[slen++] = '0';
 
         FormatUInt64(frac, &string[slen]);
     }
 }
 
 
 /* Format a number into a hexadecimal string in a signal safe manner. The string
  * should be at least 17 characters in order to handle all uint64_t values. */
 void
 FormatUInt64Hex(uint64_t num, char *string)
 {
     uint64_t divisor;
     int len;
     int i;
 
     for (len = 1, divisor = 0x10;
          len < 16 && num / divisor;
          len++, divisor *= 0x10);
 
     for (i = len, divisor = 1; i > 0; i--, divisor *= 0x10) {
         int val = (num / divisor) % 0x10;
 
         if (val < 10)
             string[i - 1] = '0' + val;
         else
             string[i - 1] = 'a' + val - 10;
     }
 
     string[len] = '\0';
 }
 
 #if !defined(WIN32) || defined(__CYGWIN__)
 /* Move a file descriptor out of the way of our select mask; this
  * is useful for file descriptors which will never appear in the
  * select mask to avoid reducing the number of clients that can
  * connect to the server
  */
 int
 os_move_fd(int fd)
 {
     int newfd;
 
 #ifdef F_DUPFD_CLOEXEC
     newfd = fcntl(fd, F_DUPFD_CLOEXEC, MAXCLIENTS);
 #else
     newfd = fcntl(fd, F_DUPFD, MAXCLIENTS);
 #endif
     if (newfd < 0)
         return fd;
 #ifndef F_DUPFD_CLOEXEC
     fcntl(newfd, F_SETFD, FD_CLOEXEC);
 #endif
     close(fd);
     return newfd;
 }
 #endif