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+/* $XdotOrg: xc/programs/Xserver/os/utils.c,v 1.21 2005/11/08 06:33:30 jkj Exp $ */
+/* $Xorg: utils.c,v 1.5 2001/02/09 02:05:24 xorgcvs Exp $ */
+/*
+
+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.
+
+*/
+/* $XFree86: xc/programs/Xserver/os/utils.c,v 3.96 2004/01/07 04:16:37 dawes Exp $ */
+
+/**************************************************************************/
+/* */
+/* Copyright (c) 2001, 2011 NoMachine, http://www.nomachine.com/. */
+/* */
+/* NX-X11, NX protocol compression and NX extensions to this software */
+/* are copyright of NoMachine. Redistribution and use of the present */
+/* software is allowed according to terms specified in the file LICENSE */
+/* which comes in the source distribution. */
+/* */
+/* Check http://www.nomachine.com/licensing.html for applicability. */
+/* */
+/* NX and NoMachine are trademarks of Medialogic S.p.A. */
+/* */
+/* All rights reserved. */
+/* */
+/**************************************************************************/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifdef __CYGWIN__
+#include <stdlib.h>
+#include <signal.h>
+#endif
+
+#if defined(WIN32) && !defined(__CYGWIN__)
+#include <X11/Xwinsock.h>
+#endif
+#include <X11/Xos.h>
+#include <stdio.h>
+#include "misc.h"
+#include <X11/X.h>
+#include <X11/Xtrans/Xtrans.h>
+#include "input.h"
+#include "dixfont.h"
+#include "osdep.h"
+#ifdef X_POSIX_C_SOURCE
+#define _POSIX_C_SOURCE X_POSIX_C_SOURCE
+#include <signal.h>
+#undef _POSIX_C_SOURCE
+#else
+#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE)
+#include <signal.h>
+#else
+#define _POSIX_SOURCE
+#include <signal.h>
+#undef _POSIX_SOURCE
+#endif
+#endif
+#ifndef WIN32
+#include <sys/wait.h>
+#endif
+#if !defined(SYSV) && !defined(WIN32) && !defined(Lynx) && !defined(QNX4)
+#include <sys/resource.h>
+#endif
+#include <time.h>
+#include <sys/stat.h>
+#include <ctype.h> /* for isspace */
+#include <stdarg.h>
+
+#if defined(DGUX)
+#include <sys/resource.h>
+#include <netdb.h>
+#endif
+
+#include <stdlib.h> /* for malloc() */
+
+#if defined(TCPCONN) || defined(STREAMSCONN)
+# ifndef WIN32
+# include <netdb.h>
+# endif
+#endif
+
+#include "opaque.h"
+
+#ifdef SMART_SCHEDULE
+#include "dixstruct.h"
+#endif
+
+#ifdef XKB
+#include <X11/extensions/XKBsrv.h>
+#endif
+#ifdef XCSECURITY
+#define _SECURITY_SERVER
+#include <X11/extensions/security.h>
+#endif
+
+#ifdef RENDER
+#include "picture.h"
+#endif
+
+#ifdef XPRINT
+#include "DiPrint.h"
+#endif
+
+Bool noTestExtensions;
+#ifdef BIGREQS
+Bool noBigReqExtension = FALSE;
+#endif
+#ifdef COMPOSITE
+/* COMPOSITE is disabled by default for now until the
+ * interface is stable */
+Bool noCompositeExtension = TRUE;
+#endif
+#ifdef DAMAGE
+Bool noDamageExtension = FALSE;
+#endif
+#ifdef DBE
+Bool noDbeExtension = FALSE;
+#endif
+#ifdef DPSEXT
+Bool noDPSExtension = FALSE;
+#endif
+#ifdef DPMSExtension
+Bool noDPMSExtension = FALSE;
+#endif
+#ifdef EVI
+Bool noEVIExtension = FALSE;
+#endif
+#ifdef FONTCACHE
+Bool noFontCacheExtension = FALSE;
+#endif
+#ifdef GLXEXT
+Bool noGlxExtension = FALSE;
+#endif
+#ifdef LBX
+Bool noLbxExtension = FALSE;
+#endif
+#ifdef SCREENSAVER
+Bool noScreenSaverExtension = FALSE;
+#endif
+#ifdef MITSHM
+Bool noMITShmExtension = FALSE;
+#endif
+#ifdef MITMISC
+Bool noMITMiscExtension = FALSE;
+#endif
+#ifdef MULTIBUFFER
+Bool noMultibufferExtension = FALSE;
+#endif
+#ifdef RANDR
+Bool noRRExtension = FALSE;
+#endif
+#ifdef RENDER
+Bool noRenderExtension = FALSE;
+#endif
+#ifdef SHAPE
+Bool noShapeExtension = FALSE;
+#endif
+#ifdef XCSECURITY
+Bool noSecurityExtension = FALSE;
+#endif
+#ifdef XSYNC
+Bool noSyncExtension = FALSE;
+#endif
+#ifdef TOGCUP
+Bool noXcupExtension = FALSE;
+#endif
+#ifdef RES
+Bool noResExtension = FALSE;
+#endif
+#ifdef XAPPGROUP
+Bool noXagExtension = FALSE;
+#endif
+#ifdef XCMISC
+Bool noXCMiscExtension = FALSE;
+#endif
+#ifdef XEVIE
+/* Xevie is disabled by default for now until the
+ * interface is stable */
+Bool noXevieExtension = TRUE;
+#endif
+#ifdef XF86BIGFONT
+Bool noXFree86BigfontExtension = FALSE;
+#endif
+#ifdef XFreeXDGA
+Bool noXFree86DGAExtension = FALSE;
+#endif
+#ifdef XF86DRI
+Bool noXFree86DRIExtension = FALSE;
+#endif
+#ifdef XF86MISC
+Bool noXFree86MiscExtension = FALSE;
+#endif
+#ifdef XF86VIDMODE
+Bool noXFree86VidModeExtension = FALSE;
+#endif
+#ifdef XFIXES
+Bool noXFixesExtension = FALSE;
+#endif
+/* |noXkbExtension| is defined in xc/programs/Xserver/xkb/xkbInit.c */
+#ifdef PANORAMIX
+/* Xinerama is disabled by default unless enabled via +xinerama */
+Bool noPanoramiXExtension = TRUE;
+#endif
+#ifdef XINPUT
+Bool noXInputExtension = FALSE;
+#endif
+#ifdef XIDLE
+Bool noXIdleExtension = FALSE;
+#endif
+#ifdef XV
+Bool noXvExtension = FALSE;
+#endif
+
+#define X_INCLUDE_NETDB_H
+#include <X11/Xos_r.h>
+
+#include <errno.h>
+
+#ifdef NX_TRANS_SOCKET
+
+#include "NX.h"
+#include "NXvars.h"
+
+#endif
+
+#ifdef NX_TRANS_EXIT
+
+void (*OsVendorStartRedirectErrorFProc)() = NULL;
+void (*OsVendorEndRedirectErrorFProc)() = NULL;
+
+#endif
+
+Bool CoreDump;
+
+#ifdef PANORAMIX
+Bool PanoramiXVisibilityNotifySent = FALSE;
+Bool PanoramiXMapped = FALSE;
+Bool PanoramiXWindowExposureSent = FALSE;
+Bool PanoramiXOneExposeRequest = FALSE;
+Bool PanoramiXExtensionDisabledHack = FALSE;
+#endif
+
+int auditTrailLevel = 1;
+
+Bool Must_have_memory = FALSE;
+
+#ifdef AIXV3
+int SyncOn = 0;
+extern int SelectWaitTime;
+#endif
+
+#ifdef DEBUG
+#ifndef SPECIAL_MALLOC
+#define MEMBUG
+#endif
+#endif
+
+#if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
+#define HAS_SAVED_IDS_AND_SETEUID
+#endif
+
+#ifdef MEMBUG
+#define MEM_FAIL_SCALE 100000
+long Memory_fail = 0;
+#include <stdlib.h> /* for random() */
+#endif
+
+#ifdef sgi
+int userdefinedfontpath = 0;
+#endif /* sgi */
+
+char *dev_tty_from_init = NULL; /* since we need to parse it anyway */
+
+extern char dispatchExceptionAtReset;
+
+/* Extension enable/disable in miinitext.c */
+extern Bool EnableDisableExtension(char *name, Bool enable);
+extern void EnableDisableExtensionError(char *name, Bool enable);
+
+OsSigHandlerPtr
+OsSignal(sig, handler)
+ int sig;
+ OsSigHandlerPtr handler;
+{
+#ifdef X_NOT_POSIX
+ return signal(sig, handler);
+#else
+ struct sigaction act, oact;
+
+ sigemptyset(&act.sa_mask);
+ if (handler != SIG_IGN)
+ sigaddset(&act.sa_mask, sig);
+ act.sa_flags = 0;
+ act.sa_handler = handler;
+ sigaction(sig, &act, &oact);
+ return oact.sa_handler;
+#endif
+}
+
+#ifdef SERVER_LOCK
+/*
+ * Explicit support for a server lock file like the ones used for UUCP.
+ * For architectures with virtual terminals that can run more than one
+ * server at a time. This keeps the servers from stomping on each other
+ * if the user forgets to give them different display numbers.
+ */
+#ifndef __UNIXOS2__
+#define LOCK_DIR "/tmp"
+#endif
+#define LOCK_TMP_PREFIX "/.tX"
+#define LOCK_PREFIX "/.X"
+#define LOCK_SUFFIX "-lock"
+
+#if defined(DGUX)
+#include <limits.h>
+#include <sys/param.h>
+#endif
+
+#ifdef __UNIXOS2__
+#define link rename
+#endif
+
+#ifndef PATH_MAX
+#ifndef Lynx
+#include <sys/param.h>
+#else
+#include <param.h>
+#endif
+#ifndef PATH_MAX
+#ifdef MAXPATHLEN
+#define PATH_MAX MAXPATHLEN
+#else
+#define PATH_MAX 1024
+#endif
+#endif
+#endif
+
+static Bool StillLocking = FALSE;
+static char LockFile[PATH_MAX];
+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
+ */
+#ifndef __UNIXOS2__
+ tmppath = LOCK_DIR;
+#else
+ /* OS/2 uses TMP directory, must also prepare for 8.3 names */
+ tmppath = getenv("TMP");
+ if (!tmppath)
+ FatalError("No TMP dir found\n");
+#endif
+
+ 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);
+#ifndef __UNIXOS2__
+#ifndef USE_CHMOD
+ (void) fchmod(lfd, 0444);
+#else
+ (void) chmod(tmp, 0444);
+#endif
+#endif
+ (void) close(lfd);
+
+ /*
+ * OK. Now the tmp file exists. Try three times to move it in place
+ * for the lock.
+ */
+ i = 0;
+ haslock = 0;
+ while ((!haslock) && (i++ < 3)) {
+ haslock = (link(tmp,LockFile) == 0);
+ if (haslock) {
+ /*
+ * We're done.
+ */
+ break;
+ }
+ else {
+ /*
+ * Read the pid from the existing file
+ */
+ lfd = open(LockFile, O_RDONLY);
+ if (lfd < 0) {
+ unlink(tmp);
+ FatalError("Can't read lock file %s\n", LockFile);
+ }
+ pid_str[0] = '\0';
+ if (read(lfd, pid_str, 11) != 11) {
+ /*
+ * Bogus lock file.
+ */
+ unlink(LockFile);
+ close(lfd);
+ continue;
+ }
+ pid_str[11] = '\0';
+ sscanf(pid_str, "%d", &l_pid);
+ close(lfd);
+
+ /*
+ * Now try to kill the PID to see if it exists.
+ */
+ errno = 0;
+ t = kill(l_pid, 0);
+ if ((t< 0) && (errno == ESRCH)) {
+ /*
+ * Stale lock file.
+ */
+ unlink(LockFile);
+ continue;
+ }
+ else if (((t < 0) && (errno == EPERM)) || (t == 0)) {
+ /*
+ * Process is still active.
+ */
+ unlink(tmp);
+ FatalError("Server is already active for display %s\n%s %s\n%s\n",
+ 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){
+
+#ifdef __UNIXOS2__
+ (void) chmod(LockFile,S_IREAD|S_IWRITE);
+#endif /* __UNIXOS2__ */
+ (void) unlink(LockFile);
+ }
+}
+#endif /* SERVER_LOCK */
+
+/* Force connections to close on SIGHUP from init */
+
+/*ARGSUSED*/
+SIGVAL
+AutoResetServer (int sig)
+{
+ int olderrno = errno;
+
+ dispatchException |= DE_RESET;
+ isItTimeToYield = TRUE;
+#ifdef GPROF
+ chdir ("/tmp");
+ exit (0);
+#endif
+#if defined(SYSV) && defined(X_NOT_POSIX)
+ OsSignal (SIGHUP, AutoResetServer);
+#endif
+ errno = olderrno;
+}
+
+/* Force connections to close and then exit on SIGTERM, SIGINT */
+
+/*ARGSUSED*/
+SIGVAL
+GiveUp(int sig)
+{
+ int olderrno = errno;
+
+#if defined(NX_TRANS_SOCKET) && defined(NX_TRANS_TEST)
+ fprintf(stderr, "GiveUp: Called with signal [%d].\n", sig);
+#endif
+
+ dispatchException |= DE_TERMINATE;
+ isItTimeToYield = TRUE;
+#if defined(SYSV) && defined(X_NOT_POSIX)
+ if (sig)
+ OsSignal(sig, SIG_IGN);
+#endif
+ errno = olderrno;
+}
+
+#ifndef DDXTIME
+CARD32
+GetTimeInMillis(void)
+{
+ struct timeval tp;
+
+ X_GETTIMEOFDAY(&tp);
+ return(tp.tv_sec * 1000) + (tp.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)
+{
+#if !defined(AIXrt) && !defined(AIX386)
+ ErrorF("use: X [:<display>] [option]\n");
+ ErrorF("-a # mouse acceleration (pixels)\n");
+ ErrorF("-ac disable access control restrictions\n");
+#ifdef MEMBUG
+ ErrorF("-alloc int chance alloc should fail\n");
+#endif
+ ErrorF("-audit int set audit trail level\n");
+ ErrorF("-auth file select authorization file\n");
+ ErrorF("bc enable bug compatibility\n");
+ ErrorF("-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("-co file color database file\n");
+#ifdef COMMANDLINE_CHALLENGED_OPERATING_SYSTEMS
+ ErrorF("-config file read options from file\n");
+#endif
+ ErrorF("-core generate core dump on fatal error\n");
+ ErrorF("-dpi int screen resolution in dots per inch\n");
+#ifdef DPMSExtension
+ ErrorF("dpms enables VESA DPMS monitor control\n");
+ ErrorF("-dpms disables VESA DPMS monitor control\n");
+#endif
+ ErrorF("-deferglyphs [none|all|16] defer loading of [no|all|16-bit] glyphs\n");
+ ErrorF("-f # bell base (0-100)\n");
+ ErrorF("-fc string cursor font\n");
+ ErrorF("-fn string default font name\n");
+ ErrorF("-fp string default font path\n");
+ ErrorF("-help prints message with these options\n");
+ ErrorF("-I ignore all remaining arguments\n");
+#ifdef RLIMIT_DATA
+ ErrorF("-ld int limit data space to N Kb\n");
+#endif
+#ifdef RLIMIT_NOFILE
+ ErrorF("-lf int limit number of open files to N\n");
+#endif
+#ifdef RLIMIT_STACK
+ ErrorF("-ls int limit stack space to N Kb\n");
+#endif
+#ifdef SERVER_LOCK
+ ErrorF("-nolock disable the locking mechanism\n");
+#endif
+#ifndef NOLOGOHACK
+ ErrorF("-logo enable logo in screen saver\n");
+ ErrorF("nologo disable logo in screen saver\n");
+#endif
+ ErrorF("-nolisten string don't listen on protocol\n");
+ ErrorF("-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");
+#ifdef RENDER
+ ErrorF("-render [default|mono|gray|color] set render color alloc policy\n");
+#endif
+ ErrorF("-s # screen-saver timeout (minutes)\n");
+#ifdef XCSECURITY
+ ErrorF("-sp file security policy file\n");
+#endif
+#ifdef XPRINT
+ PrinterUseMsg();
+#endif
+ ErrorF("-su disable any save under support\n");
+ ErrorF("-t # mouse threshold (pixels)\n");
+ ErrorF("-terminate terminate at server reset\n");
+ ErrorF("-to # connection time out\n");
+ ErrorF("-tst disable testing extensions\n");
+ ErrorF("ttyxx server started from init on /dev/ttyxx\n");
+ ErrorF("v video blanking for screen-saver\n");
+ ErrorF("-v screen-saver without video blanking\n");
+ ErrorF("-wm WhenMapped default backing-store\n");
+ ErrorF("-x string loads named extension at init time \n");
+ ErrorF("-maxbigreqsize set maximal bigrequest size \n");
+#ifdef PANORAMIX
+ ErrorF("+xinerama Enable XINERAMA extension\n");
+ ErrorF("-xinerama Disable XINERAMA extension\n");
+#endif
+#ifdef SMART_SCHEDULE
+ ErrorF("-dumbSched Disable smart scheduling, enable old behavior\n");
+ ErrorF("-schedInterval int Set scheduler interval in msec\n");
+#endif
+ ErrorF("+extension name Enable extension\n");
+ ErrorF("-extension name Disable extension\n");
+#ifdef XDMCP
+ XdmcpUseMsg();
+#endif
+#endif /* !AIXrt && ! AIX386 */
+#ifdef XKB
+ XkbUseMsg();
+#endif
+ ddxUseMsg();
+}
+
+/* This function performs a rudimentary sanity check
+ * on the display name passed in on the command-line,
+ * since this string is used to generate filenames.
+ * It is especially important that the display name
+ * not contain a "/" and not start with a "-".
+ * --kvajk
+ */
+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 is responsible for doing initalisation of any global
+ * variables at an very early point of server startup (even before
+ * |ProcessCommandLine()|.
+ */
+void InitGlobals(void)
+{
+ ddxInitGlobals();
+}
+
+
+/*
+ * 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;
+ }
+#ifdef MEMBUG
+ else if ( strcmp( argv[i], "-alloc") == 0)
+ {
+ if(++i < argc)
+ Memory_fail = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+#endif
+ else if ( strcmp( argv[i], "-audit") == 0)
+ {
+ if(++i < argc)
+ auditTrailLevel = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-auth") == 0)
+ {
+ if(++i < argc)
+ InitAuthorization (argv[i]);
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "bc") == 0)
+ permitOldBugs = TRUE;
+ else if ( strcmp( argv[i], "-br") == 0)
+ blackRoot = TRUE;
+ 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], "-co") == 0)
+ {
+ if(++i < argc)
+ rgbPath = argv[i];
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-core") == 0)
+ CoreDump = TRUE;
+ else if ( strcmp( argv[i], "-dpi") == 0)
+ {
+ if(++i < argc)
+ monitorResolution = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+#ifdef DPMSExtension
+ else if ( strcmp( argv[i], "dpms") == 0)
+ DPMSEnabledSwitch = TRUE;
+ else if ( strcmp( argv[i], "-dpms") == 0)
+ DPMSDisabledSwitch = TRUE;
+#endif
+ else if ( strcmp( argv[i], "-deferglyphs") == 0)
+ {
+ if(++i >= argc || !ParseGlyphCachingMode(argv[i]))
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-f") == 0)
+ {
+ if(++i < argc)
+ defaultKeyboardControl.bell = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-fc") == 0)
+ {
+ if(++i < argc)
+ defaultCursorFont = argv[i];
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-fn") == 0)
+ {
+ if(++i < argc)
+ defaultTextFont = argv[i];
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-fp") == 0)
+ {
+ if(++i < argc)
+ {
+#ifdef sgi
+ userdefinedfontpath = 1;
+#endif /* sgi */
+ defaultFontPath = argv[i];
+ }
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-help") == 0)
+ {
+ UseMsg();
+ exit(0);
+ }
+#ifdef XKB
+ else if ( (skip=XkbProcessArguments(argc,argv,i))!=0 ) {
+ if (skip>0)
+ i+= skip-1;
+ else UseMsg();
+ }
+#endif
+#ifdef RLIMIT_DATA
+ else if ( strcmp( argv[i], "-ld") == 0)
+ {
+ if(++i < argc)
+ {
+ limitDataSpace = atoi(argv[i]);
+ if (limitDataSpace > 0)
+ limitDataSpace *= 1024;
+ }
+ else
+ UseMsg();
+ }
+#endif
+#ifdef RLIMIT_NOFILE
+ else if ( strcmp( argv[i], "-lf") == 0)
+ {
+ if(++i < argc)
+ limitNoFile = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+#endif
+#ifdef RLIMIT_STACK
+ else if ( strcmp( argv[i], "-ls") == 0)
+ {
+ if(++i < argc)
+ {
+ limitStackSpace = atoi(argv[i]);
+ if (limitStackSpace > 0)
+ limitStackSpace *= 1024;
+ }
+ else
+ UseMsg();
+ }
+#endif
+#ifdef SERVER_LOCK
+ else if ( strcmp ( argv[i], "-nolock") == 0)
+ {
+#if !defined(WIN32) && !defined(__UNIXOS2__) && !defined(__CYGWIN__)
+ if (getuid() != 0)
+ ErrorF("Warning: the -nolock option can only be used by root\n");
+ else
+#endif
+ nolock = TRUE;
+ }
+#endif
+#ifndef NOLOGOHACK
+ else if ( strcmp( argv[i], "-logo") == 0)
+ {
+ logoScreenSaver = 1;
+ }
+ else if ( strcmp( argv[i], "nologo") == 0)
+ {
+ logoScreenSaver = 0;
+ }
+#endif
+ else if ( strcmp( argv[i], "-nolisten") == 0)
+ {
+ if(++i < argc) {
+ 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], "-pn") == 0)
+ PartialNetwork = TRUE;
+ else if ( strcmp( argv[i], "-nopn") == 0)
+ PartialNetwork = FALSE;
+ else if ( strcmp( argv[i], "r") == 0)
+ defaultKeyboardControl.autoRepeat = TRUE;
+ else if ( strcmp( argv[i], "-r") == 0)
+ defaultKeyboardControl.autoRepeat = FALSE;
+ else if ( strcmp( argv[i], "-s") == 0)
+ {
+ if(++i < argc)
+ defaultScreenSaverTime = ((CARD32)atoi(argv[i])) *
+ MILLI_PER_MIN;
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-su") == 0)
+ disableSaveUnders = TRUE;
+ else if ( strcmp( argv[i], "-t") == 0)
+ {
+ if(++i < argc)
+ defaultPointerControl.threshold = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-terminate") == 0)
+ {
+ 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], "-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], "-x") == 0)
+ {
+ if(++i >= argc)
+ UseMsg();
+ /* For U**x, which doesn't support dynamic loading, there's nothing
+ * to do when we see a -x. Either the extension is linked in or
+ * it isn't */
+ }
+ else if ( strcmp( argv[i], "-I") == 0)
+ {
+ /* ignore all remaining arguments */
+ break;
+ }
+ else if (strncmp (argv[i], "tty", 3) == 0)
+ {
+ /* just in case any body is interested */
+ dev_tty_from_init = argv[i];
+ }
+#ifdef XDMCP
+ else if ((skip = XdmcpOptions(argc, argv, i)) != i)
+ {
+ i = skip - 1;
+ }
+#endif
+#ifdef XPRINT
+ else if ((skip = PrinterOptions(argc, argv, i)) != i)
+ {
+ i = skip - 1;
+ }
+#endif
+#ifdef XCSECURITY
+ else if ((skip = XSecurityOptions(argc, argv, i)) != i)
+ {
+ i = skip - 1;
+ }
+#endif
+#ifdef AIXV3
+ else if ( strcmp( argv[i], "-timeout") == 0)
+ {
+ if(++i < argc)
+ SelectWaitTime = atoi(argv[i]);
+ else
+ UseMsg();
+ }
+ else if ( strcmp( argv[i], "-sync") == 0)
+ {
+ SyncOn++;
+ }
+#endif
+#ifdef SMART_SCHEDULE
+ 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();
+ }
+#endif
+#ifdef RENDER
+ else if ( strcmp( argv[i], "-render" ) == 0)
+ {
+ if (++i < argc)
+ {
+ int policy = PictureParseCmapPolicy (argv[i]);
+
+ if (policy != PictureCmapPolicyInvalid)
+ PictureCmapPolicy = policy;
+ else
+ UseMsg ();
+ }
+ else
+ UseMsg ();
+ }
+#endif
+ 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]);
+ }
+ }
+}
+
+#ifdef COMMANDLINE_CHALLENGED_OPERATING_SYSTEMS
+static void
+InsertFileIntoCommandLine(
+ int *resargc, char ***resargv,
+ int prefix_argc, char **prefix_argv,
+ char *filename,
+ int suffix_argc, char **suffix_argv)
+{
+ struct stat st;
+ FILE *f;
+ char *p;
+ char *q;
+ int insert_argc;
+ char *buf;
+ int len;
+ int i;
+
+ f = fopen(filename, "r");
+ if (!f)
+ FatalError("Can't open option file %s\n", filename);
+
+ fstat(fileno(f), &st);
+
+ buf = (char *) xalloc((unsigned) st.st_size + 1);
+ if (!buf)
+ FatalError("Out of Memory\n");
+
+ len = fread(buf, 1, (unsigned) st.st_size, f);
+
+ fclose(f);
+
+ if (len < 0)
+ FatalError("Error reading option file %s\n", filename);
+
+ buf[len] = '\0';
+
+ p = buf;
+ q = buf;
+ insert_argc = 0;
+
+ while (*p)
+ {
+ while (isspace(*p))
+ p++;
+ if (!*p)
+ break;
+ if (*p == '#')
+ {
+ while (*p && *p != '\n')
+ p++;
+ } else
+ {
+ while (*p && !isspace(*p))
+ *q++ = *p++;
+ /* Since p and q might still be pointing at the same place, we */
+ /* need to step p over the whitespace now before we add the null. */
+ if (*p)
+ p++;
+ *q++ = '\0';
+ insert_argc++;
+ }
+ }
+
+ buf = (char *) xrealloc(buf, q - buf);
+ if (!buf)
+ FatalError("Out of memory reallocing option buf\n");
+
+ *resargc = prefix_argc + insert_argc + suffix_argc;
+ *resargv = (char **) xalloc((*resargc + 1) * sizeof(char *));
+ if (!*resargv)
+ FatalError("Out of Memory\n");
+
+ memcpy(*resargv, prefix_argv, prefix_argc * sizeof(char *));
+
+ p = buf;
+ for (i = 0; i < insert_argc; i++)
+ {
+ (*resargv)[prefix_argc + i] = p;
+ p += strlen(p) + 1;
+ }
+
+ memcpy(*resargv + prefix_argc + insert_argc,
+ suffix_argv, suffix_argc * sizeof(char *));
+
+ (*resargv)[*resargc] = NULL;
+} /* end InsertFileIntoCommandLine */
+
+
+void
+ExpandCommandLine(int *pargc, char ***pargv)
+{
+ int i;
+
+#if !defined(WIN32) && !defined(__UNIXOS2__) && !defined(__CYGWIN__)
+ if (getuid() != geteuid())
+ return;
+#endif
+
+ for (i = 1; i < *pargc; i++)
+ {
+ if ( (0 == strcmp((*pargv)[i], "-config")) && (i < (*pargc - 1)) )
+ {
+ InsertFileIntoCommandLine(pargc, pargv,
+ i, *pargv,
+ (*pargv)[i+1], /* filename */
+ *pargc - i - 2, *pargv + i + 2);
+ i--;
+ }
+ }
+} /* end ExpandCommandLine */
+#endif
+
+/* 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 */
+}
+
+/* XALLOC -- X's internal memory allocator. Why does it return unsigned
+ * long * instead of the more common char *? Well, if you read K&R you'll
+ * see they say that alloc must return a pointer "suitable for conversion"
+ * to whatever type you really want. In a full-blown generic allocator
+ * there's no way to solve the alignment problems without potentially
+ * wasting lots of space. But we have a more limited problem. We know
+ * we're only ever returning pointers to structures which will have to
+ * be long word aligned. So we are making a stronger guarantee. It might
+ * have made sense to make Xalloc return char * to conform with people's
+ * expectations of malloc, but this makes lint happier.
+ */
+
+#ifndef INTERNAL_MALLOC
+
+void *
+Xalloc(unsigned long amount)
+{
+ register pointer ptr;
+
+ if ((long)amount <= 0) {
+ return (unsigned long *)NULL;
+ }
+ /* aligned extra on long word boundary */
+ amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
+#ifdef MEMBUG
+ if (!Must_have_memory && Memory_fail &&
+ ((random() % MEM_FAIL_SCALE) < Memory_fail))
+ return (unsigned long *)NULL;
+#endif
+ if ((ptr = (pointer)malloc(amount))) {
+ return (unsigned long *)ptr;
+ }
+ if (Must_have_memory)
+ FatalError("Out of memory");
+ return (unsigned long *)NULL;
+}
+
+/*****************
+ * XNFalloc
+ * "no failure" realloc, alternate interface to Xalloc w/o Must_have_memory
+ *****************/
+
+void *
+XNFalloc(unsigned long amount)
+{
+ register pointer ptr;
+
+ if ((long)amount <= 0)
+ {
+ return (unsigned long *)NULL;
+ }
+ /* aligned extra on long word boundary */
+ amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
+ ptr = (pointer)malloc(amount);
+ if (!ptr)
+ {
+ FatalError("Out of memory");
+ }
+ return ((unsigned long *)ptr);
+}
+
+/*****************
+ * Xcalloc
+ *****************/
+
+void *
+Xcalloc(unsigned long amount)
+{
+ unsigned long *ret;
+
+ ret = Xalloc (amount);
+ if (ret)
+ bzero ((char *) ret, (int) amount);
+ return ret;
+}
+
+/*****************
+ * XNFcalloc
+ *****************/
+
+void *
+XNFcalloc(unsigned long amount)
+{
+ unsigned long *ret;
+
+ ret = Xalloc (amount);
+ if (ret)
+ bzero ((char *) ret, (int) amount);
+ else if ((long)amount > 0)
+ FatalError("Out of memory");
+ return ret;
+}
+
+/*****************
+ * Xrealloc
+ *****************/
+
+void *
+Xrealloc(pointer ptr, unsigned long amount)
+{
+#ifdef MEMBUG
+ if (!Must_have_memory && Memory_fail &&
+ ((random() % MEM_FAIL_SCALE) < Memory_fail))
+ return (unsigned long *)NULL;
+#endif
+ if ((long)amount <= 0)
+ {
+ if (ptr && !amount)
+ free(ptr);
+ return (unsigned long *)NULL;
+ }
+ amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
+ if (ptr)
+ ptr = (pointer)realloc((char *)ptr, amount);
+ else
+ ptr = (pointer)malloc(amount);
+ if (ptr)
+ return (unsigned long *)ptr;
+ if (Must_have_memory)
+ FatalError("Out of memory");
+ return (unsigned long *)NULL;
+}
+
+/*****************
+ * XNFrealloc
+ * "no failure" realloc, alternate interface to Xrealloc w/o Must_have_memory
+ *****************/
+
+void *
+XNFrealloc(pointer ptr, unsigned long amount)
+{
+ if (( ptr = (pointer)Xrealloc( ptr, amount ) ) == NULL)
+ {
+ if ((long)amount > 0)
+ FatalError( "Out of memory" );
+ }
+ return ((unsigned long *)ptr);
+}
+
+/*****************
+ * Xfree
+ * calls free
+ *****************/
+
+void
+Xfree(pointer ptr)
+{
+ if (ptr)
+ free((char *)ptr);
+}
+
+void
+OsInitAllocator (void)
+{
+#ifdef MEMBUG
+ static int been_here;
+
+ /* Check the memory system after each generation */
+ if (been_here)
+ CheckMemory ();
+ else
+ been_here = 1;
+#endif
+}
+#endif /* !INTERNAL_MALLOC */
+
+
+char *
+Xstrdup(const char *s)
+{
+ char *sd;
+
+ if (s == NULL)
+ return NULL;
+
+ sd = (char *)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 = (char *)XNFalloc(strlen(s) + 1);
+ strcpy(sd, s);
+ return sd;
+}
+
+#ifdef SMART_SCHEDULE
+
+unsigned long SmartScheduleIdleCount;
+Bool SmartScheduleIdle;
+Bool SmartScheduleTimerStopped;
+
+#ifdef SIGVTALRM
+#define SMART_SCHEDULE_POSSIBLE
+#endif
+
+#ifdef SMART_SCHEDULE_POSSIBLE
+#define SMART_SCHEDULE_SIGNAL SIGALRM
+#define SMART_SCHEDULE_TIMER ITIMER_REAL
+#endif
+
+#ifdef NX_TRANS_SOCKET
+void
+SmartScheduleStopTimer (void)
+#else
+static void
+SmartScheduleStopTimer (void)
+#endif
+{
+#ifdef SMART_SCHEDULE_POSSIBLE
+ struct itimerval timer;
+
+ #ifdef NX_TRANS_TEST
+ fprintf(stderr, "SmartScheduleStopTimer: Stopping timer.\n");
+ #endif
+
+ 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);
+ SmartScheduleTimerStopped = TRUE;
+#endif
+}
+
+Bool
+SmartScheduleStartTimer (void)
+{
+#ifdef SMART_SCHEDULE_POSSIBLE
+ struct itimerval timer;
+
+ #ifdef NX_TRANS_SOCKET
+
+ if (SmartScheduleDisable)
+ {
+ return FALSE;
+ }
+
+ #endif
+
+ #ifdef NX_TRANS_TEST
+ fprintf(stderr, "SmartScheduleStartTimer: Starting timer with [%ld] ms.\n",
+ SmartScheduleInterval);
+ #endif
+
+ SmartScheduleTimerStopped = FALSE;
+ 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;
+ return setitimer (ITIMER_REAL, &timer, 0) >= 0;
+#endif
+ return FALSE;
+}
+
+#ifdef SMART_SCHEDULE_POSSIBLE
+static void
+SmartScheduleTimer (int sig)
+{
+ int olderrno = errno;
+
+ SmartScheduleTime += SmartScheduleInterval;
+
+ #ifdef NX_TRANS_TEST
+ fprintf(stderr, "SmartScheduleTimer: Got timer with time [%ld] ms.\n",
+ SmartScheduleTime);
+ #endif
+
+ if (SmartScheduleIdle)
+ {
+ SmartScheduleStopTimer ();
+ }
+ errno = olderrno;
+}
+#endif
+
+Bool
+SmartScheduleInit (void)
+{
+#ifdef SMART_SCHEDULE_POSSIBLE
+ struct sigaction act;
+
+ if (SmartScheduleDisable)
+ return TRUE;
+
+ #ifdef NX_TRANS_TEST
+ fprintf(stderr, "SmartScheduleInit: Initializing the smart scheduler.\n");
+ #endif
+
+ 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;
+ }
+ /* Set up the virtual timer */
+ if (!SmartScheduleStartTimer ())
+ {
+ perror ("scheduling timer");
+ return FALSE;
+ }
+ /* stop the timer and wait for WaitForSomething to start it */
+ SmartScheduleStopTimer ();
+ return TRUE;
+#else
+ return FALSE;
+#endif
+}
+#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
+}
+
+#if !defined(WIN32) && !defined(__UNIXOS2__)
+/*
+ * "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);
+#endif
+
+#ifdef DEBUG
+ ErrorF("System: `%s'\n", command);
+#endif
+
+#ifdef NX_TRANS_EXIT
+ if (OsVendorStartRedirectErrorFProc != NULL) {
+ OsVendorStartRedirectErrorFProc();
+ }
+#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 NX_TRANS_EXIT
+ if (OsVendorEndRedirectErrorFProc != NULL) {
+ OsVendorEndRedirectErrorFProc();
+ }
+#endif
+
+#ifdef SIGCHLD
+ signal(SIGCHLD, csig);
+#endif
+
+ return p == -1 ? -1 : status;
+}
+
+static struct pid {
+ struct pid *next;
+ FILE *fp;
+ int pid;
+} *pidlist;
+
+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 = (struct pid *)xalloc(sizeof(struct pid))) == NULL)
+ return NULL;
+
+ if (pipe(pdes) < 0) {
+ xfree(cur);
+ return NULL;
+ }
+
+#ifdef NX_TRANS_EXIT
+ if (OsVendorStartRedirectErrorFProc != NULL) {
+ OsVendorStartRedirectErrorFProc();
+ }
+ OsBlockSignals ();
+#endif
+ switch (pid = fork()) {
+ case -1: /* error */
+ close(pdes[0]);
+ close(pdes[1]);
+ xfree(cur);
+#ifdef NX_TRANS_EXIT
+ if (OsVendorEndRedirectErrorFProc != NULL) {
+ OsVendorEndRedirectErrorFProc();
+ }
+ OsReleaseSignals ();
+#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]);
+ }
+
+ #ifdef NX_TRANS_SOCKET
+
+ /*
+ * Check if the child process should not
+ * use the parent's libraries.
+ */
+
+ if (_NXUnsetLibraryPath)
+ {
+ #ifndef __sun
+
+ unsetenv ("LD_LIBRARY_PATH");
+
+ #else
+
+ extern char **environ;
+
+ char **ep = environ;
+
+ ep = environ;
+
+ while (*ep)
+ {
+ if (!strncmp("LD_LIBRARY_PATH=", *ep, strlen("LD_LIBRARY_PATH=")))
+ {
+ break;
+ }
+
+ *ep++;
+ }
+
+ while (*ep)
+ {
+ *ep = *(ep + 1);
+ ep++;
+ }
+
+ #endif
+ }
+
+ #endif
+
+ #ifdef NX_TRANS_EXIT
+ OsReleaseSignals ();
+ #endif
+
+ execl("/bin/sh", "sh", "-c", command, (char *)NULL);
+ _exit(127);
+ }
+
+#ifndef NX_TRANS_EXIT
+ /* Avoid EINTR during stdio calls */
+ OsBlockSignals ();
+#endif
+
+ /* 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 = (struct pid *)xalloc(sizeof(struct pid))) == NULL)
+ return NULL;
+
+ if (pipe(pdes) < 0) {
+ xfree(cur);
+ return NULL;
+ }
+
+ switch (pid = fork()) {
+ case -1: /* error */
+ close(pdes[0]);
+ close(pdes[1]);
+ xfree(cur);
+ return NULL;
+ case 0: /* child */
+ 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("Popen: `%s', fp = %p\n", command, 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 ();
+
+#ifdef NX_TRANS_EXIT
+ if (OsVendorEndRedirectErrorFProc != NULL) {
+ OsVendorEndRedirectErrorFProc();
+ }
+#endif
+ 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 && !__UNIXOS2__ */
+
+
+/*
+ * 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
+
+#define ARGMSG \
+ "\nIf the arguments used are valid, and have been rejected incorrectly\n" \
+ "please send details of the arguments and why they are valid to\n" \
+ "%s. In the meantime, you can start the Xserver as\n" \
+ "the \"super user\" (root).\n"
+
+#define ENVMSG \
+ "\nIf the environment is valid, and have been rejected incorrectly\n" \
+ "please send details of the environment and why it is valid to\n" \
+ "%s. In the meantime, you can start the Xserver as\n" \
+ "the \"super user\" (root).\n"
+
+void
+CheckUserParameters(int argc, char **argv, char **envp)
+{
+ enum BadCode bad = NotBad;
+ int i = 0, j;
+ char *a, *e = NULL;
+#if defined(__QNX__) && !defined(__QNXNTO__)
+ char cmd_name[64];
+#endif
+
+#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)) {
+#ifdef ENVDEBUG
+ ErrorF("CheckUserParameters: removing %s from the "
+ "environment\n", strtok(envp[i], "="));
+#endif
+ 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
+#ifdef ENVDEBUG
+ ErrorF("CheckUserParameters: removing %s from the "
+ "environment\n", strtok(envp[i], "="));
+#endif
+ 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);
+ ErrorF(ARGMSG, BUGADDRESS);
+ break;
+ case ArgTooLong:
+ ErrorF("Command line argument number %d is too long\n", i);
+ ErrorF(ARGMSG, BUGADDRESS);
+ break;
+ case UnprintableArg:
+ ErrorF("Command line argument number %d contains unprintable"
+ " characters\n", i);
+ ErrorF(ARGMSG, BUGADDRESS);
+ break;
+ case EnvTooLong:
+ ErrorF("Environment variable `%s' is too long\n", e);
+ ErrorF(ENVMSG, BUGADDRESS);
+ 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");
+ ErrorF(ARGMSG, BUGADDRESS);
+ ErrorF(ENVMSG, BUGADDRESS);
+ 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
+}
+
+#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__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 23:06:19 +0000