From 3562e78743202e43aec8727005182a2558117eca Mon Sep 17 00:00:00 2001 From: marha Date: Sun, 28 Jun 2009 22:07:26 +0000 Subject: Checked in the following released items: xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz --- xorg-server/os/utils.c | 2244 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2244 insertions(+) create mode 100644 xorg-server/os/utils.c (limited to 'xorg-server/os/utils.c') diff --git a/xorg-server/os/utils.c b/xorg-server/os/utils.c new file mode 100644 index 000000000..f58c76366 --- /dev/null +++ b/xorg-server/os/utils.c @@ -0,0 +1,2244 @@ +/* + +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 +#endif + +#ifdef __CYGWIN__ +#include +#include +#endif + +#if defined(WIN32) && !defined(__CYGWIN__) +#include +#endif +#include +#include +#include +#if !defined(WIN32) || !defined(__MINGW32__) +#include +#include +#endif +#include "misc.h" +#include +#define XSERV_t +#define TRANS_SERVER +#define TRANS_REOPEN +#include +#include "input.h" +#include "dixfont.h" +#include "osdep.h" +#include "extension.h" +#ifdef X_POSIX_C_SOURCE +#define _POSIX_C_SOURCE X_POSIX_C_SOURCE +#include +#undef _POSIX_C_SOURCE +#else +#if defined(X_NOT_POSIX) || defined(_POSIX_SOURCE) +#include +#else +#define _POSIX_SOURCE +#include +#undef _POSIX_SOURCE +#endif +#endif +#ifndef WIN32 +#include +#endif +#if !defined(SYSV) && !defined(WIN32) && !defined(Lynx) && !defined(QNX4) +#include +#endif +#include +#include /* for isspace */ +#include + +#if defined(DGUX) +#include +#include +#endif + +#include /* for malloc() */ + +#if defined(TCPCONN) || defined(STREAMSCONN) +# ifndef WIN32 +# include +# endif +#endif + +#include "opaque.h" + +#ifdef SMART_SCHEDULE +#include "dixstruct.h" +#endif + +#ifdef XKB +#include +#endif + +#ifdef RENDER +#include "picture.h" +#endif + +#ifdef XPRINT +#include "DiPrint.h" +#endif + +_X_EXPORT Bool noTestExtensions; +#ifdef BIGREQS +_X_EXPORT Bool noBigReqExtension = FALSE; +#endif +#ifdef COMPOSITE +_X_EXPORT Bool noCompositeExtension = FALSE; +#endif + +#ifdef DAMAGE +_X_EXPORT Bool noDamageExtension = FALSE; +#endif +#ifdef DBE +_X_EXPORT Bool noDbeExtension = FALSE; +#endif +#ifdef DPMSExtension +_X_EXPORT Bool noDPMSExtension = FALSE; +#endif +#ifdef EVI +_X_EXPORT Bool noEVIExtension = FALSE; +#endif +#ifdef FONTCACHE +_X_EXPORT Bool noFontCacheExtension = FALSE; +#endif +#ifdef GLXEXT +_X_EXPORT Bool noGlxExtension = FALSE; +_X_EXPORT Bool noGlxVisualInit = FALSE; +#endif +#ifdef SCREENSAVER +_X_EXPORT Bool noScreenSaverExtension = FALSE; +#endif +#ifdef MITSHM +_X_EXPORT Bool noMITShmExtension = FALSE; +#endif +#ifdef MITMISC +_X_EXPORT Bool noMITMiscExtension = FALSE; +#endif +#ifdef MULTIBUFFER +_X_EXPORT Bool noMultibufferExtension = FALSE; +#endif +#ifdef RANDR +_X_EXPORT Bool noRRExtension = FALSE; +#endif +#ifdef RENDER +_X_EXPORT Bool noRenderExtension = FALSE; +#endif +#ifdef SHAPE +_X_EXPORT Bool noShapeExtension = FALSE; +#endif +#ifdef XCSECURITY +_X_EXPORT Bool noSecurityExtension = FALSE; +#endif +#ifdef XSYNC +_X_EXPORT Bool noSyncExtension = FALSE; +#endif +#ifdef TOGCUP +_X_EXPORT Bool noXcupExtension = FALSE; +#endif +#ifdef RES +_X_EXPORT Bool noResExtension = FALSE; +#endif +#ifdef XAPPGROUP +_X_EXPORT Bool noXagExtension = FALSE; +#endif +#ifdef XCMISC +_X_EXPORT Bool noXCMiscExtension = FALSE; +#endif +#ifdef XEVIE +/* Xevie is disabled by default for now until the + * interface is stable */ +_X_EXPORT Bool noXevieExtension = TRUE; +#endif +#ifdef XF86BIGFONT +_X_EXPORT Bool noXFree86BigfontExtension = FALSE; +#endif +#ifdef XFreeXDGA +_X_EXPORT Bool noXFree86DGAExtension = FALSE; +#endif +#ifdef XF86DRI +_X_EXPORT Bool noXFree86DRIExtension = FALSE; +#endif +#ifdef XF86MISC +_X_EXPORT Bool noXFree86MiscExtension = FALSE; +#endif +#ifdef XF86VIDMODE +_X_EXPORT Bool noXFree86VidModeExtension = FALSE; +#endif +#ifdef XFIXES +_X_EXPORT 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 */ +_X_EXPORT Bool noPanoramiXExtension = TRUE; +#endif +#ifdef XINPUT +_X_EXPORT Bool noXInputExtension = FALSE; +#endif +#ifdef XIDLE +_X_EXPORT Bool noXIdleExtension = FALSE; +#endif +#ifdef XSELINUX +_X_EXPORT Bool noSELinuxExtension = TRUE; +_X_EXPORT int selinuxEnforcingState = SELINUX_MODE_DEFAULT; +#endif +#ifdef XV +_X_EXPORT Bool noXvExtension = FALSE; +#endif +#ifdef DRI2 +_X_EXPORT Bool noDRI2Extension = FALSE; +#endif + +#define X_INCLUDE_NETDB_H +#include + +#include + +Bool CoreDump; + +#ifdef PANORAMIX +Bool PanoramiXExtensionDisabledHack = FALSE; +#endif + +int auditTrailLevel = 1; + +_X_EXPORT Bool Must_have_memory = FALSE; + +#ifdef AIXV3 +int SyncOn = 0; +extern int SelectWaitTime; +#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 /* for random() */ +#endif + +static char *dev_tty_from_init = NULL; /* since we need to parse it anyway */ + +OsSigHandlerPtr +OsSignal(sig, handler) + int sig; + OsSigHandlerPtr handler; +{ +#ifdef X_NOT_POSIX + return signal(sig, handler); +#else + struct sigaction act, oact; + + sigemptyset(&act.sa_mask); + if (handler != SIG_IGN) + sigaddset(&act.sa_mask, sig); + act.sa_flags = 0; + act.sa_handler = handler; + if (sigaction(sig, &act, &oact)) + perror("sigaction"); + 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. + */ +#define LOCK_DIR "/tmp" +#define LOCK_TMP_PREFIX "/.tX" +#define LOCK_PREFIX "/.X" +#define LOCK_SUFFIX "-lock" + +#if defined(DGUX) +#include +#include +#endif + +#ifndef PATH_MAX +#ifndef Lynx +#include +#else +#include +#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 + */ + tmppath = LOCK_DIR; + + sprintf(port, "%d", atoi(display)); + len = strlen(LOCK_PREFIX) > strlen(LOCK_TMP_PREFIX) ? strlen(LOCK_PREFIX) : + strlen(LOCK_TMP_PREFIX); + len += strlen(tmppath) + strlen(port) + strlen(LOCK_SUFFIX) + 1; + if (len > sizeof(LockFile)) + FatalError("Display name `%s' is too long\n", port); + (void)sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX, tmppath, port); + (void)sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX, tmppath, port); + + /* + * Create a temporary file containing our PID. Attempt three times + * to create the file. + */ + StillLocking = TRUE; + i = 0; + do { + i++; + lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644); + if (lfd < 0) + sleep(2); + else + break; + } while (i < 3); + if (lfd < 0) { + unlink(tmp); + i = 0; + do { + i++; + lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644); + if (lfd < 0) + sleep(2); + else + break; + } while (i < 3); + } + if (lfd < 0) + FatalError("Could not create lock file in %s\n", tmp); + (void) sprintf(pid_str, "%10ld\n", (long)getpid()); + (void) write(lfd, pid_str, 11); +#ifndef USE_CHMOD + (void) fchmod(lfd, 0444); +#else + (void) chmod(tmp, 0444); +#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){ + + (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*/ +_X_EXPORT SIGVAL +GiveUp(int sig) +{ + int olderrno = errno; + + dispatchException |= DE_TERMINATE; + isItTimeToYield = TRUE; +#if defined(SYSV) && defined(X_NOT_POSIX) + if (sig) + OsSignal(sig, SIG_IGN); +#endif + errno = olderrno; +} + +#if defined WIN32 && defined __MINGW32__ +_X_EXPORT CARD32 +GetTimeInMillis (void) +{ + return GetTickCount (); +} +#else +_X_EXPORT CARD32 +GetTimeInMillis(void) +{ + struct timeval tv; + +#ifdef MONOTONIC_CLOCK + struct timespec tp; + if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0) + return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L); +#endif + + X_GETTIMEOFDAY(&tv); + return(tv.tv_sec * 1000) + (tv.tv_usec / 1000); +} +#endif + +_X_EXPORT 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 [:] [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("-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"); +#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 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("-wr create root window with white background\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], "-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], "-core") == 0) + { + CoreDump = TRUE; +#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 + } + 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) + { + 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(__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], "-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], "-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], "-wr") == 0) + whiteRoot = TRUE; + else if ( strcmp( argv[i], "-maxbigreqsize") == 0) { + if(++i < argc) { + long reqSizeArg = atol(argv[i]); + + /* Request size > 128MB does not make much sense... */ + if( reqSizeArg > 0L && reqSizeArg < 128L ) { + maxBigRequestSize = (reqSizeArg * 1048576L) - 1L; + } + else + { + UseMsg(); + } + } + else + { + UseMsg(); + } + } +#ifdef PANORAMIX + else if ( strcmp( argv[i], "+xinerama") == 0){ + noPanoramiXExtension = FALSE; + } + else if ( strcmp( argv[i], "-xinerama") == 0){ + noPanoramiXExtension = TRUE; + } + else if ( strcmp( argv[i], "-disablexineramaextension") == 0){ + PanoramiXExtensionDisabledHack = TRUE; + } +#endif + else if ( strcmp( argv[i], "-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 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(__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 + +_X_EXPORT 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 + *****************/ + +_X_EXPORT 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 + *****************/ + +_X_EXPORT void * +Xcalloc(unsigned long amount) +{ + unsigned long *ret; + + ret = Xalloc (amount); + if (ret) + bzero ((char *) ret, (int) amount); + return ret; +} + +/***************** + * XNFcalloc + *****************/ + +_X_EXPORT 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 + *****************/ + +_X_EXPORT 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 + *****************/ + +_X_EXPORT 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 + *****************/ + +_X_EXPORT 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; +} + + +_X_EXPORT 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 + +#ifdef SIGVTALRM +#define SMART_SCHEDULE_POSSIBLE +#endif + +#ifdef SMART_SCHEDULE_POSSIBLE +#define SMART_SCHEDULE_SIGNAL SIGALRM +#define SMART_SCHEDULE_TIMER ITIMER_REAL +#endif + +void +SmartScheduleStopTimer (void) +{ +#ifdef SMART_SCHEDULE_POSSIBLE + struct itimerval timer; + + if (SmartScheduleDisable) + return; + timer.it_interval.tv_sec = 0; + timer.it_interval.tv_usec = 0; + timer.it_value.tv_sec = 0; + timer.it_value.tv_usec = 0; + (void) setitimer (ITIMER_REAL, &timer, 0); +#endif +} + +void +SmartScheduleStartTimer (void) +{ +#ifdef SMART_SCHEDULE_POSSIBLE + struct itimerval timer; + + if (SmartScheduleDisable) + return; + timer.it_interval.tv_sec = 0; + timer.it_interval.tv_usec = SmartScheduleInterval * 1000; + timer.it_value.tv_sec = 0; + timer.it_value.tv_usec = SmartScheduleInterval * 1000; + setitimer (ITIMER_REAL, &timer, 0); +#endif +} + +#ifdef SMART_SCHEDULE_POSSIBLE +static void +SmartScheduleTimer (int sig) +{ + SmartScheduleTime += SmartScheduleInterval; +} +#endif + +Bool +SmartScheduleInit (void) +{ +#ifdef SMART_SCHEDULE_POSSIBLE + struct sigaction act; + + if (SmartScheduleDisable) + return TRUE; + + bzero ((char *) &act, sizeof(struct sigaction)); + + /* Set up the timer signal function */ + act.sa_handler = SmartScheduleTimer; + sigemptyset (&act.sa_mask); + sigaddset (&act.sa_mask, SMART_SCHEDULE_SIGNAL); + if (sigaction (SMART_SCHEDULE_SIGNAL, &act, 0) < 0) + { + perror ("sigaction for smart scheduler"); + return FALSE; + } + return TRUE; +#else + return FALSE; +#endif +} +#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) +/* + * "safer" versions of system(3), popen(3) and pclose(3) which give up + * all privs before running a command. + * + * This is based on the code in FreeBSD 2.2 libc. + * + * XXX It'd be good to redirect stderr so that it ends up in the log file + * as well. As it is now, xkbcomp messages don't end up in the log file. + */ + +int +System(char *command) +{ + int pid, p; +#ifdef SIGCHLD + void (*csig)(int); +#endif + int status; + + if (!command) + return(1); + +#ifdef SIGCHLD + csig = signal(SIGCHLD, SIG_DFL); + if (csig == SIG_ERR) { + perror("signal"); + return -1; + } +#endif + +#ifdef DEBUG + ErrorF("System: `%s'\n", command); +#endif + + switch (pid = fork()) { + case -1: /* error */ + p = -1; + case 0: /* child */ + if (setgid(getgid()) == -1) + _exit(127); + if (setuid(getuid()) == -1) + _exit(127); + execl("/bin/sh", "sh", "-c", command, (char *)NULL); + _exit(127); + default: /* parent */ + do { + p = waitpid(pid, &status, 0); + } while (p == -1 && errno == EINTR); + + } + +#ifdef SIGCHLD + if (signal(SIGCHLD, csig) == SIG_ERR) { + perror("signal"); + return -1; + } +#endif + + return p == -1 ? -1 : status; +} + +static struct pid { + struct pid *next; + FILE *fp; + int pid; +} *pidlist; + +void (*old_alarm)(int) = NULL; /* XXX horrible awful hack */ + +pointer +Popen(char *command, char *type) +{ + struct pid *cur; + FILE *iop; + int pdes[2], pid; + + if (command == NULL || type == NULL) + return NULL; + + if ((*type != 'r' && *type != 'w') || type[1]) + return NULL; + + if ((cur = (struct pid *)xalloc(sizeof(struct pid))) == NULL) + return NULL; + + if (pipe(pdes) < 0) { + xfree(cur); + return NULL; + } + + /* Ignore the smart scheduler while this is going on */ + old_alarm = signal(SIGALRM, SIG_IGN); + if (old_alarm == SIG_ERR) { + perror("signal"); + return NULL; + } + + switch (pid = fork()) { + case -1: /* error */ + close(pdes[0]); + close(pdes[1]); + xfree(cur); + if (signal(SIGALRM, old_alarm) == SIG_ERR) + perror("signal"); + return NULL; + case 0: /* child */ + if (setgid(getgid()) == -1) + _exit(127); + if (setuid(getuid()) == -1) + _exit(127); + if (*type == 'r') { + if (pdes[1] != 1) { + /* stdout */ + dup2(pdes[1], 1); + close(pdes[1]); + } + close(pdes[0]); + } else { + if (pdes[0] != 0) { + /* stdin */ + dup2(pdes[0], 0); + close(pdes[0]); + } + close(pdes[1]); + } + execl("/bin/sh", "sh", "-c", command, (char *)NULL); + _exit(127); + } + + /* Avoid EINTR during stdio calls */ + OsBlockSignals (); + + /* parent */ + if (*type == 'r') { + iop = fdopen(pdes[0], type); + close(pdes[1]); + } else { + iop = fdopen(pdes[1], type); + close(pdes[0]); + } + + cur->fp = iop; + cur->pid = pid; + cur->next = pidlist; + pidlist = cur; + +#ifdef DEBUG + ErrorF("Popen: `%s', fp = %p\n", command, iop); +#endif + + return iop; +} + +/* fopen that drops privileges */ +pointer +Fopen(char *file, char *type) +{ + FILE *iop; +#ifndef HAS_SAVED_IDS_AND_SETEUID + struct pid *cur; + int pdes[2], pid; + + if (file == NULL || type == NULL) + return NULL; + + if ((*type != 'r' && *type != 'w') || type[1]) + return NULL; + + if ((cur = (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("Fopen(%s), fp = %p\n", file, iop); +#endif + + return iop; +#else + int ruid, euid; + + ruid = getuid(); + euid = geteuid(); + + if (seteuid(ruid) == -1) { + return NULL; + } + iop = fopen(file, type); + + if (seteuid(euid) == -1) { + fclose(iop); + return NULL; + } + return iop; +#endif /* HAS_SAVED_IDS_AND_SETEUID */ +} + +int +Pclose(pointer iop) +{ + struct pid *cur, *last; + int pstat; + int pid; + +#ifdef DEBUG + ErrorF("Pclose: fp = %p\n", iop); +#endif + + fclose(iop); + + for (last = NULL, cur = pidlist; cur; last = cur, cur = cur->next) + if (cur->fp == iop) + break; + if (cur == NULL) + return -1; + + do { + pid = waitpid(cur->pid, &pstat, 0); + } while (pid == -1 && errno == EINTR); + + if (last == NULL) + pidlist = cur->next; + else + last->next = cur->next; + xfree(cur); + + /* allow EINTR again */ + OsReleaseSignals (); + + if (old_alarm && signal(SIGALRM, old_alarm) == SIG_ERR) { + perror("signal"); + return -1; + } + + return pid == -1 ? -1 : pstat; +} + +int +Fclose(pointer iop) +{ +#ifdef HAS_SAVED_IDS_AND_SETEUID + return fclose(iop); +#else + return Pclose(iop); +#endif +} + +#endif /* !WIN32 */ + + +/* + * CheckUserParameters: check for long command line arguments and long + * environment variables. By default, these checks are only done when + * the server's euid != ruid. In 3.3.x, these checks were done in an + * external wrapper utility. + */ + +/* Consider LD* variables insecure? */ +#ifndef REMOVE_ENV_LD +#define REMOVE_ENV_LD 1 +#endif + +/* Remove long environment variables? */ +#ifndef REMOVE_LONG_ENV +#define REMOVE_LONG_ENV 1 +#endif + +/* + * Disallow stdout or stderr as pipes? It's possible to block the X server + * when piping stdout+stderr to a pipe. + * + * Don't enable this because it looks like it's going to cause problems. + */ +#ifndef NO_OUTPUT_PIPES +#define NO_OUTPUT_PIPES 0 +#endif + + +/* Check args and env only if running setuid (euid == 0 && euid != uid) ? */ +#ifndef CHECK_EUID +#ifndef WIN32 +#define CHECK_EUID 1 +#else +#define CHECK_EUID 0 +#endif +#endif + +/* + * Maybe the locale can be faked to make isprint(3) report that everything + * is printable? Avoid it by default. + */ +#ifndef USE_ISPRINT +#define USE_ISPRINT 0 +#endif + +#define MAX_ARG_LENGTH 128 +#define MAX_ENV_LENGTH 256 +#define MAX_ENV_PATH_LENGTH 2048 /* Limit for *PATH and TERMCAP */ + +#if USE_ISPRINT +#include +#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 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)) { + for (j = i; envp[j]; j++) { + envp[j] = envp[j+1]; + } + } +#endif + if (envp[i] && (strlen(envp[i]) > MAX_ENV_LENGTH)) { +#if REMOVE_LONG_ENV + for (j = i; envp[j]; j++) { + envp[j] = envp[j+1]; + } + i--; +#else + char *eq; + int len; + + eq = strchr(envp[i], '='); + if (!eq) + continue; + len = eq - envp[i]; + e = malloc(len + 1); + if (!e) { + bad = InternalError; + break; + } + strncpy(e, envp[i], len); + e[len] = 0; + if (len >= 4 && + (strcmp(e + len - 4, "PATH") == 0 || + strcmp(e, "TERMCAP") == 0)) { + if (strlen(envp[i]) > MAX_ENV_PATH_LENGTH) { + bad = EnvTooLong; + break; + } else { + free(e); + } + } else { + bad = EnvTooLong; + break; + } +#endif + } + } + } +#if NO_OUTPUT_PIPES + if (!bad) { + struct stat buf; + + if (fstat(fileno(stdout), &buf) == 0 && S_ISFIFO(buf.st_mode)) + bad = OutputIsPipe; + if (fstat(fileno(stderr), &buf) == 0 && S_ISFIFO(buf.st_mode)) + bad = OutputIsPipe; + } +#endif + } + switch (bad) { + case NotBad: + return; + case UnsafeArg: + ErrorF("Command line argument number %d is unsafe\n", i); + break; + case ArgTooLong: + ErrorF("Command line argument number %d is too long\n", i); + break; + case UnprintableArg: + ErrorF("Command line argument number %d contains unprintable" + " characters\n", i); + break; + case EnvTooLong: + ErrorF("Environment variable `%s' is too long\n", e); + break; + case OutputIsPipe: + ErrorF("Stdout and/or stderr is a pipe\n"); + break; + case InternalError: + ErrorF("Internal Error\n"); + break; + default: + ErrorF("Unknown error\n"); + break; + } + FatalError("X server aborted because of unsafe environment\n"); +} + +/* + * CheckUserAuthorization: check if the user is allowed to start the + * X server. This usually means some sort of PAM checking, and it is + * usually only done for setuid servers (uid != euid). + */ + +#ifdef USE_PAM +#include +#include +#include +#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 + +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__ */ -- cgit v1.2.3