| 1 | /* |
| 2 | |
| 3 | Copyright 1987, 1998 The Open Group |
| 4 | |
| 5 | Permission to use, copy, modify, distribute, and sell this software and its |
| 6 | documentation for any purpose is hereby granted without fee, provided that |
| 7 | the above copyright notice appear in all copies and that both that |
| 8 | copyright notice and this permission notice appear in supporting |
| 9 | documentation. |
| 10 | |
| 11 | The above copyright notice and this permission notice shall be included |
| 12 | in all copies or substantial portions of the Software. |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 16 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 17 | IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 18 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 19 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 20 | OTHER DEALINGS IN THE SOFTWARE. |
| 21 | |
| 22 | Except as contained in this notice, the name of The Open Group shall |
| 23 | not be used in advertising or otherwise to promote the sale, use or |
| 24 | other dealings in this Software without prior written authorization |
| 25 | from The Open Group. |
| 26 | |
| 27 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts, |
| 28 | Copyright 1994 Quarterdeck Office Systems. |
| 29 | |
| 30 | All Rights Reserved |
| 31 | |
| 32 | Permission to use, copy, modify, and distribute this software and its |
| 33 | documentation for any purpose and without fee is hereby granted, |
| 34 | provided that the above copyright notice appear in all copies and that |
| 35 | both that copyright notice and this permission notice appear in |
| 36 | supporting documentation, and that the names of Digital and |
| 37 | Quarterdeck not be used in advertising or publicity pertaining to |
| 38 | distribution of the software without specific, written prior |
| 39 | permission. |
| 40 | |
| 41 | DIGITAL AND QUARTERDECK DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
| 42 | SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 43 | FITNESS, IN NO EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT |
| 44 | OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS |
| 45 | OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE |
| 46 | OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE |
| 47 | OR PERFORMANCE OF THIS SOFTWARE. |
| 48 | |
| 49 | */ |
| 50 | |
| 51 | #ifdef HAVE_DIX_CONFIG_H |
| 52 | #include <dix-config.h> |
| 53 | #endif |
| 54 | |
| 55 | #ifdef __CYGWIN__ |
| 56 | #include <stdlib.h> |
| 57 | #include <signal.h> |
| 58 | /* |
| 59 | Sigh... We really need a prototype for this to know it is stdcall, |
| 60 | but #include-ing <windows.h> here is not a good idea... |
| 61 | */ |
| 62 | __stdcall unsigned long GetTickCount(void); |
| 63 | #endif |
| 64 | |
| 65 | #if defined(WIN32) && !defined(__CYGWIN__) |
| 66 | #include <X11/Xwinsock.h> |
| 67 | #endif |
| 68 | #include <X11/Xos.h> |
| 69 | #include <stdio.h> |
| 70 | #include <time.h> |
| 71 | #if !defined(WIN32) || !defined(__MINGW32__) |
| 72 | #include <sys/time.h> |
| 73 | #include <sys/resource.h> |
| 74 | # define SMART_SCHEDULE_POSSIBLE |
| 75 | #endif |
| 76 | #include "misc.h" |
| 77 | #include <X11/X.h> |
| 78 | #define XSERV_t |
| 79 | #define TRANS_SERVER |
| 80 | #define TRANS_REOPEN |
| 81 | #include <X11/Xtrans/Xtrans.h> |
| 82 | #include "input.h" |
| 83 | #include "dixfont.h" |
| 84 | #include "osdep.h" |
| 85 | #include "extension.h" |
| 86 | #ifdef X_POSIX_C_SOURCE |
| 87 | #define _POSIX_C_SOURCE X_POSIX_C_SOURCE |
| 88 | #include <signal.h> |
| 89 | #undef _POSIX_C_SOURCE |
| 90 | #else |
| 91 | #if defined(_POSIX_SOURCE) |
| 92 | #include <signal.h> |
| 93 | #else |
| 94 | #define _POSIX_SOURCE |
| 95 | #include <signal.h> |
| 96 | #undef _POSIX_SOURCE |
| 97 | #endif |
| 98 | #endif |
| 99 | #ifndef WIN32 |
| 100 | #include <sys/wait.h> |
| 101 | #endif |
| 102 | #if !defined(SYSV) && !defined(WIN32) |
| 103 | #include <sys/resource.h> |
| 104 | #endif |
| 105 | #include <sys/stat.h> |
| 106 | #include <ctype.h> /* for isspace */ |
| 107 | #include <stdarg.h> |
| 108 | |
| 109 | #include <stdlib.h> /* for malloc() */ |
| 110 | |
| 111 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 112 | #ifndef WIN32 |
| 113 | #include <netdb.h> |
| 114 | #endif |
| 115 | #endif |
| 116 | |
| 117 | #include "opaque.h" |
| 118 | |
| 119 | #include "dixstruct.h" |
| 120 | |
| 121 | #include "xkbsrv.h" |
| 122 | |
| 123 | #include "picture.h" |
| 124 | |
| 125 | Bool noTestExtensions; |
| 126 | |
| 127 | #ifdef COMPOSITE |
| 128 | Bool noCompositeExtension = FALSE; |
| 129 | #endif |
| 130 | |
| 131 | #ifdef DAMAGE |
| 132 | Bool noDamageExtension = FALSE; |
| 133 | #endif |
| 134 | #ifdef DBE |
| 135 | Bool noDbeExtension = FALSE; |
| 136 | #endif |
| 137 | #ifdef DPMSExtension |
| 138 | Bool noDPMSExtension = FALSE; |
| 139 | #endif |
| 140 | #ifdef GLXEXT |
| 141 | Bool noGlxExtension = FALSE; |
| 142 | #endif |
| 143 | #ifdef SCREENSAVER |
| 144 | Bool noScreenSaverExtension = FALSE; |
| 145 | #endif |
| 146 | #ifdef MITSHM |
| 147 | Bool noMITShmExtension = FALSE; |
| 148 | #endif |
| 149 | #ifdef RANDR |
| 150 | Bool noRRExtension = FALSE; |
| 151 | #endif |
| 152 | Bool noRenderExtension = FALSE; |
| 153 | |
| 154 | #ifdef XCSECURITY |
| 155 | Bool noSecurityExtension = FALSE; |
| 156 | #endif |
| 157 | #ifdef RES |
| 158 | Bool noResExtension = FALSE; |
| 159 | #endif |
| 160 | #ifdef XF86BIGFONT |
| 161 | Bool noXFree86BigfontExtension = FALSE; |
| 162 | #endif |
| 163 | #ifdef XFreeXDGA |
| 164 | Bool noXFree86DGAExtension = FALSE; |
| 165 | #endif |
| 166 | #ifdef XF86DRI |
| 167 | Bool noXFree86DRIExtension = FALSE; |
| 168 | #endif |
| 169 | #ifdef XF86VIDMODE |
| 170 | Bool noXFree86VidModeExtension = FALSE; |
| 171 | #endif |
| 172 | Bool noXFixesExtension = FALSE; |
| 173 | #ifdef PANORAMIX |
| 174 | /* Xinerama is disabled by default unless enabled via +xinerama */ |
| 175 | Bool noPanoramiXExtension = TRUE; |
| 176 | #endif |
| 177 | #ifdef XSELINUX |
| 178 | Bool noSELinuxExtension = FALSE; |
| 179 | int selinuxEnforcingState = SELINUX_MODE_DEFAULT; |
| 180 | #endif |
| 181 | #ifdef XV |
| 182 | Bool noXvExtension = FALSE; |
| 183 | #endif |
| 184 | #ifdef DRI2 |
| 185 | Bool noDRI2Extension = FALSE; |
| 186 | #endif |
| 187 | |
| 188 | Bool noGEExtension = FALSE; |
| 189 | |
| 190 | #define X_INCLUDE_NETDB_H |
| 191 | #include <X11/Xos_r.h> |
| 192 | |
| 193 | #include <errno.h> |
| 194 | |
| 195 | Bool CoreDump; |
| 196 | |
| 197 | #ifdef PANORAMIX |
| 198 | Bool PanoramiXExtensionDisabledHack = FALSE; |
| 199 | #endif |
| 200 | |
| 201 | int auditTrailLevel = 1; |
| 202 | |
| 203 | char *SeatId = NULL; |
| 204 | |
| 205 | sig_atomic_t inSignalContext = FALSE; |
| 206 | |
| 207 | #if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED) |
| 208 | #define HAS_SAVED_IDS_AND_SETEUID |
| 209 | #endif |
| 210 | |
| 211 | OsSigHandlerPtr |
| 212 | OsSignal(int sig, OsSigHandlerPtr handler) |
| 213 | { |
| 214 | #if defined(WIN32) && !defined(__CYGWIN__) |
| 215 | return signal(sig, handler); |
| 216 | #else |
| 217 | struct sigaction act, oact; |
| 218 | |
| 219 | sigemptyset(&act.sa_mask); |
| 220 | if (handler != SIG_IGN) |
| 221 | sigaddset(&act.sa_mask, sig); |
| 222 | act.sa_flags = 0; |
| 223 | act.sa_handler = handler; |
| 224 | if (sigaction(sig, &act, &oact)) |
| 225 | perror("sigaction"); |
| 226 | return oact.sa_handler; |
| 227 | #endif |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * Explicit support for a server lock file like the ones used for UUCP. |
| 232 | * For architectures with virtual terminals that can run more than one |
| 233 | * server at a time. This keeps the servers from stomping on each other |
| 234 | * if the user forgets to give them different display numbers. |
| 235 | */ |
| 236 | #define LOCK_DIR "/tmp" |
| 237 | #define LOCK_TMP_PREFIX "/.tX" |
| 238 | #define LOCK_PREFIX "/.X" |
| 239 | #define LOCK_SUFFIX "-lock" |
| 240 | |
| 241 | #if !defined(WIN32) || defined(__CYGWIN__) |
| 242 | #define LOCK_SERVER |
| 243 | #endif |
| 244 | |
| 245 | #ifndef LOCK_SERVER |
| 246 | void |
| 247 | LockServer(void) |
| 248 | {} |
| 249 | |
| 250 | void |
| 251 | UnlockServer(void) |
| 252 | {} |
| 253 | #else /* LOCK_SERVER */ |
| 254 | static Bool StillLocking = FALSE; |
| 255 | static char LockFile[PATH_MAX]; |
| 256 | static Bool nolock = FALSE; |
| 257 | |
| 258 | /* |
| 259 | * LockServer -- |
| 260 | * Check if the server lock file exists. If so, check if the PID |
| 261 | * contained inside is valid. If so, then die. Otherwise, create |
| 262 | * the lock file containing the PID. |
| 263 | */ |
| 264 | void |
| 265 | LockServer(void) |
| 266 | { |
| 267 | char tmp[PATH_MAX], pid_str[12]; |
| 268 | int lfd, i, haslock, l_pid, t; |
| 269 | const char *tmppath = LOCK_DIR; |
| 270 | int len; |
| 271 | char port[20]; |
| 272 | |
| 273 | if (nolock) |
| 274 | return; |
| 275 | /* |
| 276 | * Path names |
| 277 | */ |
| 278 | snprintf(port, sizeof(port), "%d", atoi(display)); |
| 279 | len = strlen(LOCK_PREFIX) > strlen(LOCK_TMP_PREFIX) ? strlen(LOCK_PREFIX) : |
| 280 | strlen(LOCK_TMP_PREFIX); |
| 281 | len += strlen(tmppath) + strlen(port) + strlen(LOCK_SUFFIX) + 1; |
| 282 | if (len > sizeof(LockFile)) |
| 283 | FatalError("Display name `%s' is too long\n", port); |
| 284 | (void) sprintf(tmp, "%s" LOCK_TMP_PREFIX "%s" LOCK_SUFFIX, tmppath, port); |
| 285 | (void) sprintf(LockFile, "%s" LOCK_PREFIX "%s" LOCK_SUFFIX, tmppath, port); |
| 286 | |
| 287 | /* |
| 288 | * Create a temporary file containing our PID. Attempt three times |
| 289 | * to create the file. |
| 290 | */ |
| 291 | StillLocking = TRUE; |
| 292 | i = 0; |
| 293 | do { |
| 294 | i++; |
| 295 | lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644); |
| 296 | if (lfd < 0) |
| 297 | sleep(2); |
| 298 | else |
| 299 | break; |
| 300 | } while (i < 3); |
| 301 | if (lfd < 0) { |
| 302 | unlink(tmp); |
| 303 | i = 0; |
| 304 | do { |
| 305 | i++; |
| 306 | lfd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0644); |
| 307 | if (lfd < 0) |
| 308 | sleep(2); |
| 309 | else |
| 310 | break; |
| 311 | } while (i < 3); |
| 312 | } |
| 313 | if (lfd < 0) |
| 314 | FatalError("Could not create lock file in %s\n", tmp); |
| 315 | snprintf(pid_str, sizeof(pid_str), "%10ld\n", (long) getpid()); |
| 316 | (void) write(lfd, pid_str, 11); |
| 317 | (void) fchmod(lfd, 0444); |
| 318 | (void) close(lfd); |
| 319 | |
| 320 | /* |
| 321 | * OK. Now the tmp file exists. Try three times to move it in place |
| 322 | * for the lock. |
| 323 | */ |
| 324 | i = 0; |
| 325 | haslock = 0; |
| 326 | while ((!haslock) && (i++ < 3)) { |
| 327 | haslock = (link(tmp, LockFile) == 0); |
| 328 | if (haslock) { |
| 329 | /* |
| 330 | * We're done. |
| 331 | */ |
| 332 | break; |
| 333 | } |
| 334 | else { |
| 335 | /* |
| 336 | * Read the pid from the existing file |
| 337 | */ |
| 338 | lfd = open(LockFile, O_RDONLY | O_NOFOLLOW); |
| 339 | if (lfd < 0) { |
| 340 | unlink(tmp); |
| 341 | FatalError("Can't read lock file %s\n", LockFile); |
| 342 | } |
| 343 | pid_str[0] = '\0'; |
| 344 | if (read(lfd, pid_str, 11) != 11) { |
| 345 | /* |
| 346 | * Bogus lock file. |
| 347 | */ |
| 348 | unlink(LockFile); |
| 349 | close(lfd); |
| 350 | continue; |
| 351 | } |
| 352 | pid_str[11] = '\0'; |
| 353 | sscanf(pid_str, "%d", &l_pid); |
| 354 | close(lfd); |
| 355 | |
| 356 | /* |
| 357 | * Now try to kill the PID to see if it exists. |
| 358 | */ |
| 359 | errno = 0; |
| 360 | t = kill(l_pid, 0); |
| 361 | if ((t < 0) && (errno == ESRCH)) { |
| 362 | /* |
| 363 | * Stale lock file. |
| 364 | */ |
| 365 | unlink(LockFile); |
| 366 | continue; |
| 367 | } |
| 368 | else if (((t < 0) && (errno == EPERM)) || (t == 0)) { |
| 369 | /* |
| 370 | * Process is still active. |
| 371 | */ |
| 372 | unlink(tmp); |
| 373 | FatalError |
| 374 | ("Server is already active for display %s\n%s %s\n%s\n", |
| 375 | port, "\tIf this server is no longer running, remove", |
| 376 | LockFile, "\tand start again."); |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | unlink(tmp); |
| 381 | if (!haslock) |
| 382 | FatalError("Could not create server lock file: %s\n", LockFile); |
| 383 | StillLocking = FALSE; |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * UnlockServer -- |
| 388 | * Remove the server lock file. |
| 389 | */ |
| 390 | void |
| 391 | UnlockServer(void) |
| 392 | { |
| 393 | if (nolock) |
| 394 | return; |
| 395 | |
| 396 | if (!StillLocking) { |
| 397 | |
| 398 | (void) unlink(LockFile); |
| 399 | } |
| 400 | } |
| 401 | #endif /* LOCK_SERVER */ |
| 402 | |
| 403 | /* Force connections to close on SIGHUP from init */ |
| 404 | |
| 405 | void |
| 406 | AutoResetServer(int sig) |
| 407 | { |
| 408 | int olderrno = errno; |
| 409 | |
| 410 | dispatchException |= DE_RESET; |
| 411 | isItTimeToYield = TRUE; |
| 412 | errno = olderrno; |
| 413 | } |
| 414 | |
| 415 | /* Force connections to close and then exit on SIGTERM, SIGINT */ |
| 416 | |
| 417 | void |
| 418 | GiveUp(int sig) |
| 419 | { |
| 420 | int olderrno = errno; |
| 421 | |
| 422 | dispatchException |= DE_TERMINATE; |
| 423 | isItTimeToYield = TRUE; |
| 424 | errno = olderrno; |
| 425 | } |
| 426 | |
| 427 | #if (defined WIN32 && defined __MINGW32__) || defined(__CYGWIN__) |
| 428 | CARD32 |
| 429 | GetTimeInMillis(void) |
| 430 | { |
| 431 | return GetTickCount(); |
| 432 | } |
| 433 | CARD64 |
| 434 | GetTimeInMicros(void) |
| 435 | { |
| 436 | return (CARD64) GetTickCount() * 1000; |
| 437 | } |
| 438 | #else |
| 439 | CARD32 |
| 440 | GetTimeInMillis(void) |
| 441 | { |
| 442 | struct timeval tv; |
| 443 | |
| 444 | #ifdef MONOTONIC_CLOCK |
| 445 | struct timespec tp; |
| 446 | static clockid_t clockid; |
| 447 | |
| 448 | if (!clockid) { |
| 449 | #ifdef CLOCK_MONOTONIC_COARSE |
| 450 | if (clock_getres(CLOCK_MONOTONIC_COARSE, &tp) == 0 && |
| 451 | (tp.tv_nsec / 1000) <= 1000 && |
| 452 | clock_gettime(CLOCK_MONOTONIC_COARSE, &tp) == 0) |
| 453 | clockid = CLOCK_MONOTONIC_COARSE; |
| 454 | else |
| 455 | #endif |
| 456 | if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0) |
| 457 | clockid = CLOCK_MONOTONIC; |
| 458 | else |
| 459 | clockid = ~0L; |
| 460 | } |
| 461 | if (clockid != ~0L && clock_gettime(clockid, &tp) == 0) |
| 462 | return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L); |
| 463 | #endif |
| 464 | |
| 465 | X_GETTIMEOFDAY(&tv); |
| 466 | return (tv.tv_sec * 1000) + (tv.tv_usec / 1000); |
| 467 | } |
| 468 | |
| 469 | CARD64 |
| 470 | GetTimeInMicros(void) |
| 471 | { |
| 472 | struct timeval tv; |
| 473 | #ifdef MONOTONIC_CLOCK |
| 474 | struct timespec tp; |
| 475 | static clockid_t clockid; |
| 476 | |
| 477 | if (!clockid) { |
| 478 | if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0) |
| 479 | clockid = CLOCK_MONOTONIC; |
| 480 | else |
| 481 | clockid = ~0L; |
| 482 | } |
| 483 | if (clockid != ~0L && clock_gettime(clockid, &tp) == 0) |
| 484 | return (CARD64) tp.tv_sec * (CARD64)1000000 + tp.tv_nsec / 1000; |
| 485 | #endif |
| 486 | |
| 487 | X_GETTIMEOFDAY(&tv); |
| 488 | return (CARD64) tv.tv_sec * (CARD64)1000000000 + (CARD64) tv.tv_usec * 1000; |
| 489 | } |
| 490 | #endif |
| 491 | |
| 492 | void |
| 493 | AdjustWaitForDelay(pointer waitTime, unsigned long newdelay) |
| 494 | { |
| 495 | static struct timeval delay_val; |
| 496 | struct timeval **wt = (struct timeval **) waitTime; |
| 497 | unsigned long olddelay; |
| 498 | |
| 499 | if (*wt == NULL) { |
| 500 | delay_val.tv_sec = newdelay / 1000; |
| 501 | delay_val.tv_usec = 1000 * (newdelay % 1000); |
| 502 | *wt = &delay_val; |
| 503 | } |
| 504 | else { |
| 505 | olddelay = (*wt)->tv_sec * 1000 + (*wt)->tv_usec / 1000; |
| 506 | if (newdelay < olddelay) { |
| 507 | (*wt)->tv_sec = newdelay / 1000; |
| 508 | (*wt)->tv_usec = 1000 * (newdelay % 1000); |
| 509 | } |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | void |
| 514 | UseMsg(void) |
| 515 | { |
| 516 | ErrorF("use: X [:<display>] [option]\n"); |
| 517 | ErrorF("-a # default pointer acceleration (factor)\n"); |
| 518 | ErrorF("-ac disable access control restrictions\n"); |
| 519 | ErrorF("-audit int set audit trail level\n"); |
| 520 | ErrorF("-auth file select authorization file\n"); |
| 521 | ErrorF("-br create root window with black background\n"); |
| 522 | ErrorF("+bs enable any backing store support\n"); |
| 523 | ErrorF("-bs disable any backing store support\n"); |
| 524 | ErrorF("-c turns off key-click\n"); |
| 525 | ErrorF("c # key-click volume (0-100)\n"); |
| 526 | ErrorF("-cc int default color visual class\n"); |
| 527 | ErrorF("-nocursor disable the cursor\n"); |
| 528 | ErrorF("-core generate core dump on fatal error\n"); |
| 529 | ErrorF("-dpi int screen resolution in dots per inch\n"); |
| 530 | #ifdef DPMSExtension |
| 531 | ErrorF("-dpms disables VESA DPMS monitor control\n"); |
| 532 | #endif |
| 533 | ErrorF |
| 534 | ("-deferglyphs [none|all|16] defer loading of [no|all|16-bit] glyphs\n"); |
| 535 | ErrorF("-f # bell base (0-100)\n"); |
| 536 | ErrorF("-fc string cursor font\n"); |
| 537 | ErrorF("-fn string default font name\n"); |
| 538 | ErrorF("-fp string default font path\n"); |
| 539 | ErrorF("-help prints message with these options\n"); |
| 540 | ErrorF("-I ignore all remaining arguments\n"); |
| 541 | #ifdef RLIMIT_DATA |
| 542 | ErrorF("-ld int limit data space to N Kb\n"); |
| 543 | #endif |
| 544 | #ifdef RLIMIT_NOFILE |
| 545 | ErrorF("-lf int limit number of open files to N\n"); |
| 546 | #endif |
| 547 | #ifdef RLIMIT_STACK |
| 548 | ErrorF("-ls int limit stack space to N Kb\n"); |
| 549 | #endif |
| 550 | #ifdef LOCK_SERVER |
| 551 | ErrorF("-nolock disable the locking mechanism\n"); |
| 552 | #endif |
| 553 | ErrorF("-nolisten string don't listen on protocol\n"); |
| 554 | ErrorF("-noreset don't reset after last client exists\n"); |
| 555 | ErrorF("-background [none] create root window with no background\n"); |
| 556 | ErrorF("-reset reset after last client exists\n"); |
| 557 | ErrorF("-p # screen-saver pattern duration (minutes)\n"); |
| 558 | ErrorF("-pn accept failure to listen on all ports\n"); |
| 559 | ErrorF("-nopn reject failure to listen on all ports\n"); |
| 560 | ErrorF("-r turns off auto-repeat\n"); |
| 561 | ErrorF("r turns on auto-repeat \n"); |
| 562 | ErrorF("-render [default|mono|gray|color] set render color alloc policy\n"); |
| 563 | ErrorF("-retro start with classic stipple and cursor\n"); |
| 564 | ErrorF("-s # screen-saver timeout (minutes)\n"); |
| 565 | ErrorF("-seat string seat to run on\n"); |
| 566 | ErrorF("-t # default pointer threshold (pixels/t)\n"); |
| 567 | ErrorF("-terminate terminate at server reset\n"); |
| 568 | ErrorF("-to # connection time out\n"); |
| 569 | ErrorF("-tst disable testing extensions\n"); |
| 570 | ErrorF("ttyxx server started from init on /dev/ttyxx\n"); |
| 571 | ErrorF("v video blanking for screen-saver\n"); |
| 572 | ErrorF("-v screen-saver without video blanking\n"); |
| 573 | ErrorF("-wm WhenMapped default backing-store\n"); |
| 574 | ErrorF("-wr create root window with white background\n"); |
| 575 | ErrorF("-maxbigreqsize set maximal bigrequest size \n"); |
| 576 | #ifdef PANORAMIX |
| 577 | ErrorF("+xinerama Enable XINERAMA extension\n"); |
| 578 | ErrorF("-xinerama Disable XINERAMA extension\n"); |
| 579 | #endif |
| 580 | ErrorF |
| 581 | ("-dumbSched Disable smart scheduling, enable old behavior\n"); |
| 582 | ErrorF("-schedInterval int Set scheduler interval in msec\n"); |
| 583 | ErrorF("-sigstop Enable SIGSTOP based startup\n"); |
| 584 | ErrorF("+extension name Enable extension\n"); |
| 585 | ErrorF("-extension name Disable extension\n"); |
| 586 | #ifdef XDMCP |
| 587 | XdmcpUseMsg(); |
| 588 | #endif |
| 589 | XkbUseMsg(); |
| 590 | ddxUseMsg(); |
| 591 | } |
| 592 | |
| 593 | /* This function performs a rudimentary sanity check |
| 594 | * on the display name passed in on the command-line, |
| 595 | * since this string is used to generate filenames. |
| 596 | * It is especially important that the display name |
| 597 | * not contain a "/" and not start with a "-". |
| 598 | * --kvajk |
| 599 | */ |
| 600 | static int |
| 601 | VerifyDisplayName(const char *d) |
| 602 | { |
| 603 | int i; |
| 604 | int period_found = FALSE; |
| 605 | int after_period = 0; |
| 606 | |
| 607 | if (d == (char *) 0) |
| 608 | return 0; /* null */ |
| 609 | if (*d == '\0') |
| 610 | return 0; /* empty */ |
| 611 | if (*d == '-') |
| 612 | return 0; /* could be confused for an option */ |
| 613 | if (*d == '.') |
| 614 | return 0; /* must not equal "." or ".." */ |
| 615 | if (strchr(d, '/') != (char *) 0) |
| 616 | return 0; /* very important!!! */ |
| 617 | |
| 618 | /* Since we run atoi() on the display later, only allow |
| 619 | for digits, or exception of :0.0 and similar (two decimal points max) |
| 620 | */ |
| 621 | for (i = 0; i < strlen(d); i++) { |
| 622 | if (!isdigit(d[i])) { |
| 623 | if (d[i] != '.' || period_found) |
| 624 | return 0; |
| 625 | period_found = TRUE; |
| 626 | } else if (period_found) |
| 627 | after_period++; |
| 628 | |
| 629 | if (after_period > 2) |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | /* don't allow for :0. */ |
| 634 | if (period_found && after_period == 0) |
| 635 | return 0; |
| 636 | |
| 637 | if (atol(d) > INT_MAX) |
| 638 | return 0; |
| 639 | |
| 640 | return 1; |
| 641 | } |
| 642 | |
| 643 | /* |
| 644 | * This function parses the command line. Handles device-independent fields |
| 645 | * and allows ddx to handle additional fields. It is not allowed to modify |
| 646 | * argc or any of the strings pointed to by argv. |
| 647 | */ |
| 648 | void |
| 649 | ProcessCommandLine(int argc, char *argv[]) |
| 650 | { |
| 651 | int i, skip; |
| 652 | |
| 653 | defaultKeyboardControl.autoRepeat = TRUE; |
| 654 | |
| 655 | #ifdef NO_PART_NET |
| 656 | PartialNetwork = FALSE; |
| 657 | #else |
| 658 | PartialNetwork = TRUE; |
| 659 | #endif |
| 660 | |
| 661 | for (i = 1; i < argc; i++) { |
| 662 | /* call ddx first, so it can peek/override if it wants */ |
| 663 | if ((skip = ddxProcessArgument(argc, argv, i))) { |
| 664 | i += (skip - 1); |
| 665 | } |
| 666 | else if (argv[i][0] == ':') { |
| 667 | /* initialize display */ |
| 668 | display = argv[i]; |
| 669 | display++; |
| 670 | if (!VerifyDisplayName(display)) { |
| 671 | ErrorF("Bad display name: %s\n", display); |
| 672 | UseMsg(); |
| 673 | FatalError("Bad display name, exiting: %s\n", display); |
| 674 | } |
| 675 | } |
| 676 | else if (strcmp(argv[i], "-a") == 0) { |
| 677 | if (++i < argc) |
| 678 | defaultPointerControl.num = atoi(argv[i]); |
| 679 | else |
| 680 | UseMsg(); |
| 681 | } |
| 682 | else if (strcmp(argv[i], "-ac") == 0) { |
| 683 | defeatAccessControl = TRUE; |
| 684 | } |
| 685 | else if (strcmp(argv[i], "-audit") == 0) { |
| 686 | if (++i < argc) |
| 687 | auditTrailLevel = atoi(argv[i]); |
| 688 | else |
| 689 | UseMsg(); |
| 690 | } |
| 691 | else if (strcmp(argv[i], "-auth") == 0) { |
| 692 | if (++i < argc) |
| 693 | InitAuthorization(argv[i]); |
| 694 | else |
| 695 | UseMsg(); |
| 696 | } |
| 697 | else if (strcmp(argv[i], "-br") == 0); /* default */ |
| 698 | else if (strcmp(argv[i], "+bs") == 0) |
| 699 | enableBackingStore = TRUE; |
| 700 | else if (strcmp(argv[i], "-bs") == 0) |
| 701 | disableBackingStore = TRUE; |
| 702 | else if (strcmp(argv[i], "c") == 0) { |
| 703 | if (++i < argc) |
| 704 | defaultKeyboardControl.click = atoi(argv[i]); |
| 705 | else |
| 706 | UseMsg(); |
| 707 | } |
| 708 | else if (strcmp(argv[i], "-c") == 0) { |
| 709 | defaultKeyboardControl.click = 0; |
| 710 | } |
| 711 | else if (strcmp(argv[i], "-cc") == 0) { |
| 712 | if (++i < argc) |
| 713 | defaultColorVisualClass = atoi(argv[i]); |
| 714 | else |
| 715 | UseMsg(); |
| 716 | } |
| 717 | else if (strcmp(argv[i], "-core") == 0) { |
| 718 | #if !defined(WIN32) || !defined(__MINGW32__) |
| 719 | struct rlimit core_limit; |
| 720 | |
| 721 | getrlimit(RLIMIT_CORE, &core_limit); |
| 722 | core_limit.rlim_cur = core_limit.rlim_max; |
| 723 | setrlimit(RLIMIT_CORE, &core_limit); |
| 724 | #endif |
| 725 | CoreDump = TRUE; |
| 726 | } |
| 727 | else if (strcmp(argv[i], "-nocursor") == 0) { |
| 728 | EnableCursor = FALSE; |
| 729 | } |
| 730 | else if (strcmp(argv[i], "-dpi") == 0) { |
| 731 | if (++i < argc) |
| 732 | monitorResolution = atoi(argv[i]); |
| 733 | else |
| 734 | UseMsg(); |
| 735 | } |
| 736 | else if (strcmp(argv[i], "-displayfd") == 0) { |
| 737 | if (++i < argc) { |
| 738 | displayfd = atoi(argv[i]); |
| 739 | display = NULL; |
| 740 | #ifdef LOCK_SERVER |
| 741 | nolock = TRUE; |
| 742 | #endif |
| 743 | } |
| 744 | else |
| 745 | UseMsg(); |
| 746 | } |
| 747 | #ifdef DPMSExtension |
| 748 | else if (strcmp(argv[i], "dpms") == 0) |
| 749 | /* ignored for compatibility */ ; |
| 750 | else if (strcmp(argv[i], "-dpms") == 0) |
| 751 | DPMSDisabledSwitch = TRUE; |
| 752 | #endif |
| 753 | else if (strcmp(argv[i], "-deferglyphs") == 0) { |
| 754 | if (++i >= argc || !ParseGlyphCachingMode(argv[i])) |
| 755 | UseMsg(); |
| 756 | } |
| 757 | else if (strcmp(argv[i], "-f") == 0) { |
| 758 | if (++i < argc) |
| 759 | defaultKeyboardControl.bell = atoi(argv[i]); |
| 760 | else |
| 761 | UseMsg(); |
| 762 | } |
| 763 | else if (strcmp(argv[i], "-fc") == 0) { |
| 764 | if (++i < argc) |
| 765 | defaultCursorFont = argv[i]; |
| 766 | else |
| 767 | UseMsg(); |
| 768 | } |
| 769 | else if (strcmp(argv[i], "-fn") == 0) { |
| 770 | if (++i < argc) |
| 771 | defaultTextFont = argv[i]; |
| 772 | else |
| 773 | UseMsg(); |
| 774 | } |
| 775 | else if (strcmp(argv[i], "-fp") == 0) { |
| 776 | if (++i < argc) { |
| 777 | defaultFontPath = argv[i]; |
| 778 | } |
| 779 | else |
| 780 | UseMsg(); |
| 781 | } |
| 782 | else if (strcmp(argv[i], "-help") == 0) { |
| 783 | UseMsg(); |
| 784 | exit(0); |
| 785 | } |
| 786 | else if ((skip = XkbProcessArguments(argc, argv, i)) != 0) { |
| 787 | if (skip > 0) |
| 788 | i += skip - 1; |
| 789 | else |
| 790 | UseMsg(); |
| 791 | } |
| 792 | #ifdef RLIMIT_DATA |
| 793 | else if (strcmp(argv[i], "-ld") == 0) { |
| 794 | if (++i < argc) { |
| 795 | limitDataSpace = atoi(argv[i]); |
| 796 | if (limitDataSpace > 0) |
| 797 | limitDataSpace *= 1024; |
| 798 | } |
| 799 | else |
| 800 | UseMsg(); |
| 801 | } |
| 802 | #endif |
| 803 | #ifdef RLIMIT_NOFILE |
| 804 | else if (strcmp(argv[i], "-lf") == 0) { |
| 805 | if (++i < argc) |
| 806 | limitNoFile = atoi(argv[i]); |
| 807 | else |
| 808 | UseMsg(); |
| 809 | } |
| 810 | #endif |
| 811 | #ifdef RLIMIT_STACK |
| 812 | else if (strcmp(argv[i], "-ls") == 0) { |
| 813 | if (++i < argc) { |
| 814 | limitStackSpace = atoi(argv[i]); |
| 815 | if (limitStackSpace > 0) |
| 816 | limitStackSpace *= 1024; |
| 817 | } |
| 818 | else |
| 819 | UseMsg(); |
| 820 | } |
| 821 | #endif |
| 822 | #ifdef LOCK_SERVER |
| 823 | else if (strcmp(argv[i], "-nolock") == 0) { |
| 824 | #if !defined(WIN32) && !defined(__CYGWIN__) |
| 825 | if (getuid() != 0) |
| 826 | ErrorF |
| 827 | ("Warning: the -nolock option can only be used by root\n"); |
| 828 | else |
| 829 | #endif |
| 830 | nolock = TRUE; |
| 831 | } |
| 832 | #endif |
| 833 | else if (strcmp(argv[i], "-nolisten") == 0) { |
| 834 | if (++i < argc) { |
| 835 | if (_XSERVTransNoListen(argv[i])) |
| 836 | ErrorF("Failed to disable listen for %s transport", |
| 837 | argv[i]); |
| 838 | } |
| 839 | else |
| 840 | UseMsg(); |
| 841 | } |
| 842 | else if (strcmp(argv[i], "-noreset") == 0) { |
| 843 | dispatchExceptionAtReset = 0; |
| 844 | } |
| 845 | else if (strcmp(argv[i], "-reset") == 0) { |
| 846 | dispatchExceptionAtReset = DE_RESET; |
| 847 | } |
| 848 | else if (strcmp(argv[i], "-p") == 0) { |
| 849 | if (++i < argc) |
| 850 | defaultScreenSaverInterval = ((CARD32) atoi(argv[i])) * |
| 851 | MILLI_PER_MIN; |
| 852 | else |
| 853 | UseMsg(); |
| 854 | } |
| 855 | else if (strcmp(argv[i], "-pogo") == 0) { |
| 856 | dispatchException = DE_TERMINATE; |
| 857 | } |
| 858 | else if (strcmp(argv[i], "-pn") == 0) |
| 859 | PartialNetwork = TRUE; |
| 860 | else if (strcmp(argv[i], "-nopn") == 0) |
| 861 | PartialNetwork = FALSE; |
| 862 | else if (strcmp(argv[i], "r") == 0) |
| 863 | defaultKeyboardControl.autoRepeat = TRUE; |
| 864 | else if (strcmp(argv[i], "-r") == 0) |
| 865 | defaultKeyboardControl.autoRepeat = FALSE; |
| 866 | else if (strcmp(argv[i], "-retro") == 0) |
| 867 | party_like_its_1989 = TRUE; |
| 868 | else if (strcmp(argv[i], "-s") == 0) { |
| 869 | if (++i < argc) |
| 870 | defaultScreenSaverTime = ((CARD32) atoi(argv[i])) * |
| 871 | MILLI_PER_MIN; |
| 872 | else |
| 873 | UseMsg(); |
| 874 | } |
| 875 | else if (strcmp(argv[i], "-seat") == 0) { |
| 876 | if (++i < argc) |
| 877 | SeatId = argv[i]; |
| 878 | else |
| 879 | UseMsg(); |
| 880 | } |
| 881 | else if (strcmp(argv[i], "-t") == 0) { |
| 882 | if (++i < argc) |
| 883 | defaultPointerControl.threshold = atoi(argv[i]); |
| 884 | else |
| 885 | UseMsg(); |
| 886 | } |
| 887 | else if (strcmp(argv[i], "-terminate") == 0) { |
| 888 | dispatchExceptionAtReset = DE_TERMINATE; |
| 889 | } |
| 890 | else if (strcmp(argv[i], "-to") == 0) { |
| 891 | if (++i < argc) |
| 892 | TimeOutValue = ((CARD32) atoi(argv[i])) * MILLI_PER_SECOND; |
| 893 | else |
| 894 | UseMsg(); |
| 895 | } |
| 896 | else if (strcmp(argv[i], "-tst") == 0) { |
| 897 | noTestExtensions = TRUE; |
| 898 | } |
| 899 | else if (strcmp(argv[i], "v") == 0) |
| 900 | defaultScreenSaverBlanking = PreferBlanking; |
| 901 | else if (strcmp(argv[i], "-v") == 0) |
| 902 | defaultScreenSaverBlanking = DontPreferBlanking; |
| 903 | else if (strcmp(argv[i], "-wm") == 0) |
| 904 | defaultBackingStore = WhenMapped; |
| 905 | else if (strcmp(argv[i], "-wr") == 0) |
| 906 | whiteRoot = TRUE; |
| 907 | else if (strcmp(argv[i], "-background") == 0) { |
| 908 | if (++i < argc) { |
| 909 | if (!strcmp(argv[i], "none")) |
| 910 | bgNoneRoot = TRUE; |
| 911 | else |
| 912 | UseMsg(); |
| 913 | } |
| 914 | } |
| 915 | else if (strcmp(argv[i], "-maxbigreqsize") == 0) { |
| 916 | if (++i < argc) { |
| 917 | long reqSizeArg = atol(argv[i]); |
| 918 | |
| 919 | /* Request size > 128MB does not make much sense... */ |
| 920 | if (reqSizeArg > 0L && reqSizeArg < 128L) { |
| 921 | maxBigRequestSize = (reqSizeArg * 1048576L) - 1L; |
| 922 | } |
| 923 | else { |
| 924 | UseMsg(); |
| 925 | } |
| 926 | } |
| 927 | else { |
| 928 | UseMsg(); |
| 929 | } |
| 930 | } |
| 931 | #ifdef PANORAMIX |
| 932 | else if (strcmp(argv[i], "+xinerama") == 0) { |
| 933 | noPanoramiXExtension = FALSE; |
| 934 | } |
| 935 | else if (strcmp(argv[i], "-xinerama") == 0) { |
| 936 | noPanoramiXExtension = TRUE; |
| 937 | } |
| 938 | else if (strcmp(argv[i], "-disablexineramaextension") == 0) { |
| 939 | PanoramiXExtensionDisabledHack = TRUE; |
| 940 | } |
| 941 | #endif |
| 942 | else if (strcmp(argv[i], "-I") == 0) { |
| 943 | /* ignore all remaining arguments */ |
| 944 | break; |
| 945 | } |
| 946 | else if (strncmp(argv[i], "tty", 3) == 0) { |
| 947 | /* init supplies us with this useless information */ |
| 948 | } |
| 949 | #ifdef XDMCP |
| 950 | else if ((skip = XdmcpOptions(argc, argv, i)) != i) { |
| 951 | i = skip - 1; |
| 952 | } |
| 953 | #endif |
| 954 | #ifdef SMART_SCHEDULE_POSSIBLE |
| 955 | else if (strcmp(argv[i], "-dumbSched") == 0) { |
| 956 | SmartScheduleDisable = TRUE; |
| 957 | } |
| 958 | else if (strcmp(argv[i], "-schedInterval") == 0) { |
| 959 | if (++i < argc) { |
| 960 | SmartScheduleInterval = atoi(argv[i]); |
| 961 | SmartScheduleSlice = SmartScheduleInterval; |
| 962 | } |
| 963 | else |
| 964 | UseMsg(); |
| 965 | } |
| 966 | else if (strcmp(argv[i], "-schedMax") == 0) { |
| 967 | if (++i < argc) { |
| 968 | SmartScheduleMaxSlice = atoi(argv[i]); |
| 969 | } |
| 970 | else |
| 971 | UseMsg(); |
| 972 | } |
| 973 | #endif |
| 974 | else if (strcmp(argv[i], "-render") == 0) { |
| 975 | if (++i < argc) { |
| 976 | int policy = PictureParseCmapPolicy(argv[i]); |
| 977 | |
| 978 | if (policy != PictureCmapPolicyInvalid) |
| 979 | PictureCmapPolicy = policy; |
| 980 | else |
| 981 | UseMsg(); |
| 982 | } |
| 983 | else |
| 984 | UseMsg(); |
| 985 | } |
| 986 | else if (strcmp(argv[i], "-sigstop") == 0) { |
| 987 | RunFromSigStopParent = TRUE; |
| 988 | } |
| 989 | else if (strcmp(argv[i], "+extension") == 0) { |
| 990 | if (++i < argc) { |
| 991 | if (!EnableDisableExtension(argv[i], TRUE)) |
| 992 | EnableDisableExtensionError(argv[i], TRUE); |
| 993 | } |
| 994 | else |
| 995 | UseMsg(); |
| 996 | } |
| 997 | else if (strcmp(argv[i], "-extension") == 0) { |
| 998 | if (++i < argc) { |
| 999 | if (!EnableDisableExtension(argv[i], FALSE)) |
| 1000 | EnableDisableExtensionError(argv[i], FALSE); |
| 1001 | } |
| 1002 | else |
| 1003 | UseMsg(); |
| 1004 | } |
| 1005 | else { |
| 1006 | ErrorF("Unrecognized option: %s\n", argv[i]); |
| 1007 | UseMsg(); |
| 1008 | FatalError("Unrecognized option: %s\n", argv[i]); |
| 1009 | } |
| 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | /* Implement a simple-minded font authorization scheme. The authorization |
| 1014 | name is "hp-hostname-1", the contents are simply the host name. */ |
| 1015 | int |
| 1016 | set_font_authorizations(char **authorizations, int *authlen, pointer client) |
| 1017 | { |
| 1018 | #define AUTHORIZATION_NAME "hp-hostname-1" |
| 1019 | #if defined(TCPCONN) || defined(STREAMSCONN) |
| 1020 | static char *result = NULL; |
| 1021 | static char *p = NULL; |
| 1022 | |
| 1023 | if (p == NULL) { |
| 1024 | char hname[1024], *hnameptr; |
| 1025 | unsigned int len; |
| 1026 | |
| 1027 | #if defined(IPv6) && defined(AF_INET6) |
| 1028 | struct addrinfo hints, *ai = NULL; |
| 1029 | #else |
| 1030 | struct hostent *host; |
| 1031 | |
| 1032 | #ifdef XTHREADS_NEEDS_BYNAMEPARAMS |
| 1033 | _Xgethostbynameparams hparams; |
| 1034 | #endif |
| 1035 | #endif |
| 1036 | |
| 1037 | gethostname(hname, 1024); |
| 1038 | #if defined(IPv6) && defined(AF_INET6) |
| 1039 | memset(&hints, 0, sizeof(hints)); |
| 1040 | hints.ai_flags = AI_CANONNAME; |
| 1041 | if (getaddrinfo(hname, NULL, &hints, &ai) == 0) { |
| 1042 | hnameptr = ai->ai_canonname; |
| 1043 | } |
| 1044 | else { |
| 1045 | hnameptr = hname; |
| 1046 | } |
| 1047 | #else |
| 1048 | host = _XGethostbyname(hname, hparams); |
| 1049 | if (host == NULL) |
| 1050 | hnameptr = hname; |
| 1051 | else |
| 1052 | hnameptr = host->h_name; |
| 1053 | #endif |
| 1054 | |
| 1055 | len = strlen(hnameptr) + 1; |
| 1056 | result = malloc(len + sizeof(AUTHORIZATION_NAME) + 4); |
| 1057 | |
| 1058 | p = result; |
| 1059 | *p++ = sizeof(AUTHORIZATION_NAME) >> 8; |
| 1060 | *p++ = sizeof(AUTHORIZATION_NAME) & 0xff; |
| 1061 | *p++ = (len) >> 8; |
| 1062 | *p++ = (len & 0xff); |
| 1063 | |
| 1064 | memmove(p, AUTHORIZATION_NAME, sizeof(AUTHORIZATION_NAME)); |
| 1065 | p += sizeof(AUTHORIZATION_NAME); |
| 1066 | memmove(p, hnameptr, len); |
| 1067 | p += len; |
| 1068 | #if defined(IPv6) && defined(AF_INET6) |
| 1069 | if (ai) { |
| 1070 | freeaddrinfo(ai); |
| 1071 | } |
| 1072 | #endif |
| 1073 | } |
| 1074 | *authlen = p - result; |
| 1075 | *authorizations = result; |
| 1076 | return 1; |
| 1077 | #else /* TCPCONN */ |
| 1078 | return 0; |
| 1079 | #endif /* TCPCONN */ |
| 1080 | } |
| 1081 | |
| 1082 | void * |
| 1083 | Xalloc(unsigned long amount) |
| 1084 | { |
| 1085 | /* |
| 1086 | * Xalloc used to return NULL when large amount of memory is requested. In |
| 1087 | * order to catch the buggy callers this warning has been added, slated to |
| 1088 | * removal by anyone who touches this code (or just looks at it) in 2011. |
| 1089 | * |
| 1090 | * -- Mikhail Gusarov |
| 1091 | */ |
| 1092 | if ((long) amount <= 0) |
| 1093 | ErrorF("Warning: Xalloc: " |
| 1094 | "requesting unpleasantly large amount of memory: %lu bytes.\n", |
| 1095 | amount); |
| 1096 | |
| 1097 | return malloc(amount); |
| 1098 | } |
| 1099 | |
| 1100 | void * |
| 1101 | XNFalloc(unsigned long amount) |
| 1102 | { |
| 1103 | void *ptr = malloc(amount); |
| 1104 | |
| 1105 | if (!ptr) |
| 1106 | FatalError("Out of memory"); |
| 1107 | return ptr; |
| 1108 | } |
| 1109 | |
| 1110 | void * |
| 1111 | Xcalloc(unsigned long amount) |
| 1112 | { |
| 1113 | return calloc(1, amount); |
| 1114 | } |
| 1115 | |
| 1116 | void * |
| 1117 | XNFcalloc(unsigned long amount) |
| 1118 | { |
| 1119 | void *ret = calloc(1, amount); |
| 1120 | |
| 1121 | if (!ret) |
| 1122 | FatalError("XNFcalloc: Out of memory"); |
| 1123 | return ret; |
| 1124 | } |
| 1125 | |
| 1126 | void * |
| 1127 | Xrealloc(void *ptr, unsigned long amount) |
| 1128 | { |
| 1129 | /* |
| 1130 | * Xrealloc used to return NULL when large amount of memory is requested. In |
| 1131 | * order to catch the buggy callers this warning has been added, slated to |
| 1132 | * removal by anyone who touches this code (or just looks at it) in 2011. |
| 1133 | * |
| 1134 | * -- Mikhail Gusarov |
| 1135 | */ |
| 1136 | if ((long) amount <= 0) |
| 1137 | ErrorF("Warning: Xrealloc: " |
| 1138 | "requesting unpleasantly large amount of memory: %lu bytes.\n", |
| 1139 | amount); |
| 1140 | |
| 1141 | return realloc(ptr, amount); |
| 1142 | } |
| 1143 | |
| 1144 | void * |
| 1145 | XNFrealloc(void *ptr, unsigned long amount) |
| 1146 | { |
| 1147 | void *ret = realloc(ptr, amount); |
| 1148 | |
| 1149 | if (!ret) |
| 1150 | FatalError("XNFrealloc: Out of memory"); |
| 1151 | return ret; |
| 1152 | } |
| 1153 | |
| 1154 | void |
| 1155 | Xfree(void *ptr) |
| 1156 | { |
| 1157 | free(ptr); |
| 1158 | } |
| 1159 | |
| 1160 | char * |
| 1161 | Xstrdup(const char *s) |
| 1162 | { |
| 1163 | if (s == NULL) |
| 1164 | return NULL; |
| 1165 | return strdup(s); |
| 1166 | } |
| 1167 | |
| 1168 | char * |
| 1169 | XNFstrdup(const char *s) |
| 1170 | { |
| 1171 | char *ret; |
| 1172 | |
| 1173 | if (s == NULL) |
| 1174 | return NULL; |
| 1175 | |
| 1176 | ret = strdup(s); |
| 1177 | if (!ret) |
| 1178 | FatalError("XNFstrdup: Out of memory"); |
| 1179 | return ret; |
| 1180 | } |
| 1181 | |
| 1182 | void |
| 1183 | SmartScheduleStopTimer(void) |
| 1184 | { |
| 1185 | #ifdef SMART_SCHEDULE_POSSIBLE |
| 1186 | struct itimerval timer; |
| 1187 | |
| 1188 | if (SmartScheduleDisable) |
| 1189 | return; |
| 1190 | timer.it_interval.tv_sec = 0; |
| 1191 | timer.it_interval.tv_usec = 0; |
| 1192 | timer.it_value.tv_sec = 0; |
| 1193 | timer.it_value.tv_usec = 0; |
| 1194 | (void) setitimer(ITIMER_REAL, &timer, 0); |
| 1195 | #endif |
| 1196 | } |
| 1197 | |
| 1198 | void |
| 1199 | SmartScheduleStartTimer(void) |
| 1200 | { |
| 1201 | #ifdef SMART_SCHEDULE_POSSIBLE |
| 1202 | struct itimerval timer; |
| 1203 | |
| 1204 | if (SmartScheduleDisable) |
| 1205 | return; |
| 1206 | timer.it_interval.tv_sec = 0; |
| 1207 | timer.it_interval.tv_usec = SmartScheduleInterval * 1000; |
| 1208 | timer.it_value.tv_sec = 0; |
| 1209 | timer.it_value.tv_usec = SmartScheduleInterval * 1000; |
| 1210 | setitimer(ITIMER_REAL, &timer, 0); |
| 1211 | #endif |
| 1212 | } |
| 1213 | |
| 1214 | static void |
| 1215 | SmartScheduleTimer(int sig) |
| 1216 | { |
| 1217 | SmartScheduleTime += SmartScheduleInterval; |
| 1218 | } |
| 1219 | |
| 1220 | void |
| 1221 | SmartScheduleInit(void) |
| 1222 | { |
| 1223 | #ifdef SMART_SCHEDULE_POSSIBLE |
| 1224 | struct sigaction act; |
| 1225 | |
| 1226 | if (SmartScheduleDisable) |
| 1227 | return; |
| 1228 | |
| 1229 | memset((char *) &act, 0, sizeof(struct sigaction)); |
| 1230 | |
| 1231 | /* Set up the timer signal function */ |
| 1232 | act.sa_handler = SmartScheduleTimer; |
| 1233 | sigemptyset(&act.sa_mask); |
| 1234 | sigaddset(&act.sa_mask, SIGALRM); |
| 1235 | if (sigaction(SIGALRM, &act, 0) < 0) { |
| 1236 | perror("sigaction for smart scheduler"); |
| 1237 | SmartScheduleDisable = TRUE; |
| 1238 | } |
| 1239 | #endif |
| 1240 | } |
| 1241 | |
| 1242 | #ifdef SIG_BLOCK |
| 1243 | static sigset_t PreviousSignalMask; |
| 1244 | static int BlockedSignalCount; |
| 1245 | #endif |
| 1246 | |
| 1247 | void |
| 1248 | OsBlockSignals(void) |
| 1249 | { |
| 1250 | #ifdef SIG_BLOCK |
| 1251 | if (BlockedSignalCount++ == 0) { |
| 1252 | sigset_t set; |
| 1253 | |
| 1254 | #ifdef SIGIO |
| 1255 | OsBlockSIGIO(); |
| 1256 | #endif |
| 1257 | sigemptyset(&set); |
| 1258 | sigaddset(&set, SIGALRM); |
| 1259 | sigaddset(&set, SIGVTALRM); |
| 1260 | #ifdef SIGWINCH |
| 1261 | sigaddset(&set, SIGWINCH); |
| 1262 | #endif |
| 1263 | sigaddset(&set, SIGTSTP); |
| 1264 | sigaddset(&set, SIGTTIN); |
| 1265 | sigaddset(&set, SIGTTOU); |
| 1266 | sigaddset(&set, SIGCHLD); |
| 1267 | sigprocmask(SIG_BLOCK, &set, &PreviousSignalMask); |
| 1268 | } |
| 1269 | #endif |
| 1270 | } |
| 1271 | |
| 1272 | #ifdef SIG_BLOCK |
| 1273 | static sig_atomic_t sigio_blocked; |
| 1274 | static sigset_t PreviousSigIOMask; |
| 1275 | #endif |
| 1276 | |
| 1277 | /** |
| 1278 | * returns zero if this call caused SIGIO to be blocked now, non-zero if it |
| 1279 | * was already blocked by a previous call to this function. |
| 1280 | */ |
| 1281 | int |
| 1282 | OsBlockSIGIO(void) |
| 1283 | { |
| 1284 | #ifdef SIGIO |
| 1285 | #ifdef SIG_BLOCK |
| 1286 | if (sigio_blocked++ == 0) { |
| 1287 | sigset_t set; |
| 1288 | int ret; |
| 1289 | |
| 1290 | sigemptyset(&set); |
| 1291 | sigaddset(&set, SIGIO); |
| 1292 | sigprocmask(SIG_BLOCK, &set, &PreviousSigIOMask); |
| 1293 | ret = sigismember(&PreviousSigIOMask, SIGIO); |
| 1294 | return ret; |
| 1295 | } |
| 1296 | #endif |
| 1297 | #endif |
| 1298 | return 1; |
| 1299 | } |
| 1300 | |
| 1301 | void |
| 1302 | OsReleaseSIGIO(void) |
| 1303 | { |
| 1304 | #ifdef SIGIO |
| 1305 | #ifdef SIG_BLOCK |
| 1306 | if (--sigio_blocked == 0) { |
| 1307 | sigprocmask(SIG_SETMASK, &PreviousSigIOMask, 0); |
| 1308 | } else if (sigio_blocked < 0) { |
| 1309 | BUG_WARN(sigio_blocked < 0); |
| 1310 | sigio_blocked = 0; |
| 1311 | } |
| 1312 | #endif |
| 1313 | #endif |
| 1314 | } |
| 1315 | |
| 1316 | void |
| 1317 | OsReleaseSignals(void) |
| 1318 | { |
| 1319 | #ifdef SIG_BLOCK |
| 1320 | if (--BlockedSignalCount == 0) { |
| 1321 | sigprocmask(SIG_SETMASK, &PreviousSignalMask, 0); |
| 1322 | OsReleaseSIGIO(); |
| 1323 | } |
| 1324 | #endif |
| 1325 | } |
| 1326 | |
| 1327 | void |
| 1328 | OsResetSignals(void) |
| 1329 | { |
| 1330 | #ifdef SIG_BLOCK |
| 1331 | while (BlockedSignalCount > 0) |
| 1332 | OsReleaseSignals(); |
| 1333 | #ifdef SIGIO |
| 1334 | while (sigio_blocked > 0) |
| 1335 | OsReleaseSIGIO(); |
| 1336 | #endif |
| 1337 | #endif |
| 1338 | } |
| 1339 | |
| 1340 | /* |
| 1341 | * Pending signals may interfere with core dumping. Provide a |
| 1342 | * mechanism to block signals when aborting. |
| 1343 | */ |
| 1344 | |
| 1345 | void |
| 1346 | OsAbort(void) |
| 1347 | { |
| 1348 | #ifndef __APPLE__ |
| 1349 | OsBlockSignals(); |
| 1350 | #endif |
| 1351 | abort(); |
| 1352 | } |
| 1353 | |
| 1354 | #if !defined(WIN32) |
| 1355 | /* |
| 1356 | * "safer" versions of system(3), popen(3) and pclose(3) which give up |
| 1357 | * all privs before running a command. |
| 1358 | * |
| 1359 | * This is based on the code in FreeBSD 2.2 libc. |
| 1360 | * |
| 1361 | * XXX It'd be good to redirect stderr so that it ends up in the log file |
| 1362 | * as well. As it is now, xkbcomp messages don't end up in the log file. |
| 1363 | */ |
| 1364 | |
| 1365 | int |
| 1366 | System(const char *command) |
| 1367 | { |
| 1368 | int pid, p; |
| 1369 | void (*csig) (int); |
| 1370 | int status; |
| 1371 | |
| 1372 | if (!command) |
| 1373 | return 1; |
| 1374 | |
| 1375 | csig = signal(SIGCHLD, SIG_DFL); |
| 1376 | if (csig == SIG_ERR) { |
| 1377 | perror("signal"); |
| 1378 | return -1; |
| 1379 | } |
| 1380 | DebugF("System: `%s'\n", command); |
| 1381 | |
| 1382 | switch (pid = fork()) { |
| 1383 | case -1: /* error */ |
| 1384 | p = -1; |
| 1385 | case 0: /* child */ |
| 1386 | if (setgid(getgid()) == -1) |
| 1387 | _exit(127); |
| 1388 | if (setuid(getuid()) == -1) |
| 1389 | _exit(127); |
| 1390 | execl("/bin/sh", "sh", "-c", command, (char *) NULL); |
| 1391 | _exit(127); |
| 1392 | default: /* parent */ |
| 1393 | do { |
| 1394 | p = waitpid(pid, &status, 0); |
| 1395 | } while (p == -1 && errno == EINTR); |
| 1396 | |
| 1397 | } |
| 1398 | |
| 1399 | if (signal(SIGCHLD, csig) == SIG_ERR) { |
| 1400 | perror("signal"); |
| 1401 | return -1; |
| 1402 | } |
| 1403 | |
| 1404 | return p == -1 ? -1 : status; |
| 1405 | } |
| 1406 | |
| 1407 | static struct pid { |
| 1408 | struct pid *next; |
| 1409 | FILE *fp; |
| 1410 | int pid; |
| 1411 | } *pidlist; |
| 1412 | |
| 1413 | OsSigHandlerPtr old_alarm = NULL; /* XXX horrible awful hack */ |
| 1414 | |
| 1415 | pointer |
| 1416 | Popen(const char *command, const char *type) |
| 1417 | { |
| 1418 | struct pid *cur; |
| 1419 | FILE *iop; |
| 1420 | int pdes[2], pid; |
| 1421 | |
| 1422 | if (command == NULL || type == NULL) |
| 1423 | return NULL; |
| 1424 | |
| 1425 | if ((*type != 'r' && *type != 'w') || type[1]) |
| 1426 | return NULL; |
| 1427 | |
| 1428 | if ((cur = malloc(sizeof(struct pid))) == NULL) |
| 1429 | return NULL; |
| 1430 | |
| 1431 | if (pipe(pdes) < 0) { |
| 1432 | free(cur); |
| 1433 | return NULL; |
| 1434 | } |
| 1435 | |
| 1436 | /* Ignore the smart scheduler while this is going on */ |
| 1437 | old_alarm = OsSignal(SIGALRM, SIG_IGN); |
| 1438 | if (old_alarm == SIG_ERR) { |
| 1439 | close(pdes[0]); |
| 1440 | close(pdes[1]); |
| 1441 | free(cur); |
| 1442 | perror("signal"); |
| 1443 | return NULL; |
| 1444 | } |
| 1445 | |
| 1446 | switch (pid = fork()) { |
| 1447 | case -1: /* error */ |
| 1448 | close(pdes[0]); |
| 1449 | close(pdes[1]); |
| 1450 | free(cur); |
| 1451 | if (OsSignal(SIGALRM, old_alarm) == SIG_ERR) |
| 1452 | perror("signal"); |
| 1453 | return NULL; |
| 1454 | case 0: /* child */ |
| 1455 | if (setgid(getgid()) == -1) |
| 1456 | _exit(127); |
| 1457 | if (setuid(getuid()) == -1) |
| 1458 | _exit(127); |
| 1459 | if (*type == 'r') { |
| 1460 | if (pdes[1] != 1) { |
| 1461 | /* stdout */ |
| 1462 | dup2(pdes[1], 1); |
| 1463 | close(pdes[1]); |
| 1464 | } |
| 1465 | close(pdes[0]); |
| 1466 | } |
| 1467 | else { |
| 1468 | if (pdes[0] != 0) { |
| 1469 | /* stdin */ |
| 1470 | dup2(pdes[0], 0); |
| 1471 | close(pdes[0]); |
| 1472 | } |
| 1473 | close(pdes[1]); |
| 1474 | } |
| 1475 | execl("/bin/sh", "sh", "-c", command, (char *) NULL); |
| 1476 | _exit(127); |
| 1477 | } |
| 1478 | |
| 1479 | /* Avoid EINTR during stdio calls */ |
| 1480 | OsBlockSignals(); |
| 1481 | |
| 1482 | /* parent */ |
| 1483 | if (*type == 'r') { |
| 1484 | iop = fdopen(pdes[0], type); |
| 1485 | close(pdes[1]); |
| 1486 | } |
| 1487 | else { |
| 1488 | iop = fdopen(pdes[1], type); |
| 1489 | close(pdes[0]); |
| 1490 | } |
| 1491 | |
| 1492 | cur->fp = iop; |
| 1493 | cur->pid = pid; |
| 1494 | cur->next = pidlist; |
| 1495 | pidlist = cur; |
| 1496 | |
| 1497 | DebugF("Popen: `%s', fp = %p\n", command, iop); |
| 1498 | |
| 1499 | return iop; |
| 1500 | } |
| 1501 | |
| 1502 | /* fopen that drops privileges */ |
| 1503 | pointer |
| 1504 | Fopen(const char *file, const char *type) |
| 1505 | { |
| 1506 | FILE *iop; |
| 1507 | |
| 1508 | #ifndef HAS_SAVED_IDS_AND_SETEUID |
| 1509 | struct pid *cur; |
| 1510 | int pdes[2], pid; |
| 1511 | |
| 1512 | if (file == NULL || type == NULL) |
| 1513 | return NULL; |
| 1514 | |
| 1515 | if ((*type != 'r' && *type != 'w') || type[1]) |
| 1516 | return NULL; |
| 1517 | |
| 1518 | if ((cur = malloc(sizeof(struct pid))) == NULL) |
| 1519 | return NULL; |
| 1520 | |
| 1521 | if (pipe(pdes) < 0) { |
| 1522 | free(cur); |
| 1523 | return NULL; |
| 1524 | } |
| 1525 | |
| 1526 | switch (pid = fork()) { |
| 1527 | case -1: /* error */ |
| 1528 | close(pdes[0]); |
| 1529 | close(pdes[1]); |
| 1530 | free(cur); |
| 1531 | return NULL; |
| 1532 | case 0: /* child */ |
| 1533 | if (setgid(getgid()) == -1) |
| 1534 | _exit(127); |
| 1535 | if (setuid(getuid()) == -1) |
| 1536 | _exit(127); |
| 1537 | if (*type == 'r') { |
| 1538 | if (pdes[1] != 1) { |
| 1539 | /* stdout */ |
| 1540 | dup2(pdes[1], 1); |
| 1541 | close(pdes[1]); |
| 1542 | } |
| 1543 | close(pdes[0]); |
| 1544 | } |
| 1545 | else { |
| 1546 | if (pdes[0] != 0) { |
| 1547 | /* stdin */ |
| 1548 | dup2(pdes[0], 0); |
| 1549 | close(pdes[0]); |
| 1550 | } |
| 1551 | close(pdes[1]); |
| 1552 | } |
| 1553 | execl("/bin/cat", "cat", file, (char *) NULL); |
| 1554 | _exit(127); |
| 1555 | } |
| 1556 | |
| 1557 | /* Avoid EINTR during stdio calls */ |
| 1558 | OsBlockSignals(); |
| 1559 | |
| 1560 | /* parent */ |
| 1561 | if (*type == 'r') { |
| 1562 | iop = fdopen(pdes[0], type); |
| 1563 | close(pdes[1]); |
| 1564 | } |
| 1565 | else { |
| 1566 | iop = fdopen(pdes[1], type); |
| 1567 | close(pdes[0]); |
| 1568 | } |
| 1569 | |
| 1570 | cur->fp = iop; |
| 1571 | cur->pid = pid; |
| 1572 | cur->next = pidlist; |
| 1573 | pidlist = cur; |
| 1574 | |
| 1575 | DebugF("Fopen(%s), fp = %p\n", file, iop); |
| 1576 | |
| 1577 | return iop; |
| 1578 | #else |
| 1579 | int ruid, euid; |
| 1580 | |
| 1581 | ruid = getuid(); |
| 1582 | euid = geteuid(); |
| 1583 | |
| 1584 | if (seteuid(ruid) == -1) { |
| 1585 | return NULL; |
| 1586 | } |
| 1587 | iop = fopen(file, type); |
| 1588 | |
| 1589 | if (seteuid(euid) == -1) { |
| 1590 | fclose(iop); |
| 1591 | return NULL; |
| 1592 | } |
| 1593 | return iop; |
| 1594 | #endif /* HAS_SAVED_IDS_AND_SETEUID */ |
| 1595 | } |
| 1596 | |
| 1597 | int |
| 1598 | Pclose(pointer iop) |
| 1599 | { |
| 1600 | struct pid *cur, *last; |
| 1601 | int pstat; |
| 1602 | int pid; |
| 1603 | |
| 1604 | DebugF("Pclose: fp = %p\n", iop); |
| 1605 | fclose(iop); |
| 1606 | |
| 1607 | for (last = NULL, cur = pidlist; cur; last = cur, cur = cur->next) |
| 1608 | if (cur->fp == iop) |
| 1609 | break; |
| 1610 | if (cur == NULL) |
| 1611 | return -1; |
| 1612 | |
| 1613 | do { |
| 1614 | pid = waitpid(cur->pid, &pstat, 0); |
| 1615 | } while (pid == -1 && errno == EINTR); |
| 1616 | |
| 1617 | if (last == NULL) |
| 1618 | pidlist = cur->next; |
| 1619 | else |
| 1620 | last->next = cur->next; |
| 1621 | free(cur); |
| 1622 | |
| 1623 | /* allow EINTR again */ |
| 1624 | OsReleaseSignals(); |
| 1625 | |
| 1626 | if (old_alarm && OsSignal(SIGALRM, old_alarm) == SIG_ERR) { |
| 1627 | perror("signal"); |
| 1628 | return -1; |
| 1629 | } |
| 1630 | |
| 1631 | return pid == -1 ? -1 : pstat; |
| 1632 | } |
| 1633 | |
| 1634 | int |
| 1635 | Fclose(pointer iop) |
| 1636 | { |
| 1637 | #ifdef HAS_SAVED_IDS_AND_SETEUID |
| 1638 | return fclose(iop); |
| 1639 | #else |
| 1640 | return Pclose(iop); |
| 1641 | #endif |
| 1642 | } |
| 1643 | |
| 1644 | #endif /* !WIN32 */ |
| 1645 | |
| 1646 | #ifdef WIN32 |
| 1647 | |
| 1648 | #include <X11/Xwindows.h> |
| 1649 | |
| 1650 | const char * |
| 1651 | Win32TempDir() |
| 1652 | { |
| 1653 | static char buffer[PATH_MAX]; |
| 1654 | |
| 1655 | if (GetTempPath(sizeof(buffer), buffer)) { |
| 1656 | int len; |
| 1657 | |
| 1658 | buffer[sizeof(buffer) - 1] = 0; |
| 1659 | len = strlen(buffer); |
| 1660 | if (len > 0) |
| 1661 | if (buffer[len - 1] == '\\') |
| 1662 | buffer[len - 1] = 0; |
| 1663 | return buffer; |
| 1664 | } |
| 1665 | if (getenv("TEMP") != NULL) |
| 1666 | return getenv("TEMP"); |
| 1667 | else if (getenv("TMP") != NULL) |
| 1668 | return getenv("TMP"); |
| 1669 | else |
| 1670 | return "/tmp"; |
| 1671 | } |
| 1672 | |
| 1673 | int |
| 1674 | System(const char *cmdline) |
| 1675 | { |
| 1676 | STARTUPINFO si; |
| 1677 | PROCESS_INFORMATION pi; |
| 1678 | DWORD dwExitCode; |
| 1679 | char *cmd = strdup(cmdline); |
| 1680 | |
| 1681 | ZeroMemory(&si, sizeof(si)); |
| 1682 | si.cb = sizeof(si); |
| 1683 | ZeroMemory(&pi, sizeof(pi)); |
| 1684 | |
| 1685 | if (!CreateProcess(NULL, cmd, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) { |
| 1686 | LPVOID buffer; |
| 1687 | |
| 1688 | if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| 1689 | FORMAT_MESSAGE_FROM_SYSTEM | |
| 1690 | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 1691 | NULL, |
| 1692 | GetLastError(), |
| 1693 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| 1694 | (LPTSTR) &buffer, 0, NULL)) { |
| 1695 | ErrorF("[xkb] Starting '%s' failed!\n", cmdline); |
| 1696 | } |
| 1697 | else { |
| 1698 | ErrorF("[xkb] Starting '%s' failed: %s", cmdline, (char *) buffer); |
| 1699 | LocalFree(buffer); |
| 1700 | } |
| 1701 | |
| 1702 | free(cmd); |
| 1703 | return -1; |
| 1704 | } |
| 1705 | /* Wait until child process exits. */ |
| 1706 | WaitForSingleObject(pi.hProcess, INFINITE); |
| 1707 | |
| 1708 | GetExitCodeProcess(pi.hProcess, &dwExitCode); |
| 1709 | |
| 1710 | /* Close process and thread handles. */ |
| 1711 | CloseHandle(pi.hProcess); |
| 1712 | CloseHandle(pi.hThread); |
| 1713 | free(cmd); |
| 1714 | |
| 1715 | return dwExitCode; |
| 1716 | } |
| 1717 | #endif |
| 1718 | |
| 1719 | /* |
| 1720 | * CheckUserParameters: check for long command line arguments and long |
| 1721 | * environment variables. By default, these checks are only done when |
| 1722 | * the server's euid != ruid. In 3.3.x, these checks were done in an |
| 1723 | * external wrapper utility. |
| 1724 | */ |
| 1725 | |
| 1726 | /* Consider LD* variables insecure? */ |
| 1727 | #ifndef REMOVE_ENV_LD |
| 1728 | #define REMOVE_ENV_LD 1 |
| 1729 | #endif |
| 1730 | |
| 1731 | /* Remove long environment variables? */ |
| 1732 | #ifndef REMOVE_LONG_ENV |
| 1733 | #define REMOVE_LONG_ENV 1 |
| 1734 | #endif |
| 1735 | |
| 1736 | /* |
| 1737 | * Disallow stdout or stderr as pipes? It's possible to block the X server |
| 1738 | * when piping stdout+stderr to a pipe. |
| 1739 | * |
| 1740 | * Don't enable this because it looks like it's going to cause problems. |
| 1741 | */ |
| 1742 | #ifndef NO_OUTPUT_PIPES |
| 1743 | #define NO_OUTPUT_PIPES 0 |
| 1744 | #endif |
| 1745 | |
| 1746 | /* Check args and env only if running setuid (euid == 0 && euid != uid) ? */ |
| 1747 | #ifndef CHECK_EUID |
| 1748 | #ifndef WIN32 |
| 1749 | #define CHECK_EUID 1 |
| 1750 | #else |
| 1751 | #define CHECK_EUID 0 |
| 1752 | #endif |
| 1753 | #endif |
| 1754 | |
| 1755 | /* |
| 1756 | * Maybe the locale can be faked to make isprint(3) report that everything |
| 1757 | * is printable? Avoid it by default. |
| 1758 | */ |
| 1759 | #ifndef USE_ISPRINT |
| 1760 | #define USE_ISPRINT 0 |
| 1761 | #endif |
| 1762 | |
| 1763 | #define MAX_ARG_LENGTH 128 |
| 1764 | #define MAX_ENV_LENGTH 256 |
| 1765 | #define MAX_ENV_PATH_LENGTH 2048 /* Limit for *PATH and TERMCAP */ |
| 1766 | |
| 1767 | #if USE_ISPRINT |
| 1768 | #include <ctype.h> |
| 1769 | #define checkPrintable(c) isprint(c) |
| 1770 | #else |
| 1771 | #define checkPrintable(c) (((c) & 0x7f) >= 0x20 && ((c) & 0x7f) != 0x7f) |
| 1772 | #endif |
| 1773 | |
| 1774 | enum BadCode { |
| 1775 | NotBad = 0, |
| 1776 | UnsafeArg, |
| 1777 | ArgTooLong, |
| 1778 | UnprintableArg, |
| 1779 | EnvTooLong, |
| 1780 | OutputIsPipe, |
| 1781 | InternalError |
| 1782 | }; |
| 1783 | |
| 1784 | #if defined(VENDORSUPPORT) |
| 1785 | #define BUGADDRESS VENDORSUPPORT |
| 1786 | #elif defined(BUILDERADDR) |
| 1787 | #define BUGADDRESS BUILDERADDR |
| 1788 | #else |
| 1789 | #define BUGADDRESS "xorg@freedesktop.org" |
| 1790 | #endif |
| 1791 | |
| 1792 | void |
| 1793 | CheckUserParameters(int argc, char **argv, char **envp) |
| 1794 | { |
| 1795 | enum BadCode bad = NotBad; |
| 1796 | int i = 0, j; |
| 1797 | char *a, *e = NULL; |
| 1798 | |
| 1799 | #if CHECK_EUID |
| 1800 | if (geteuid() == 0 && getuid() != geteuid()) |
| 1801 | #endif |
| 1802 | { |
| 1803 | /* Check each argv[] */ |
| 1804 | for (i = 1; i < argc; i++) { |
| 1805 | if (strcmp(argv[i], "-fp") == 0) { |
| 1806 | i++; /* continue with next argument. skip the length check */ |
| 1807 | if (i >= argc) |
| 1808 | break; |
| 1809 | } |
| 1810 | else { |
| 1811 | if (strlen(argv[i]) > MAX_ARG_LENGTH) { |
| 1812 | bad = ArgTooLong; |
| 1813 | break; |
| 1814 | } |
| 1815 | } |
| 1816 | a = argv[i]; |
| 1817 | while (*a) { |
| 1818 | if (checkPrintable(*a) == 0) { |
| 1819 | bad = UnprintableArg; |
| 1820 | break; |
| 1821 | } |
| 1822 | a++; |
| 1823 | } |
| 1824 | if (bad) |
| 1825 | break; |
| 1826 | } |
| 1827 | if (!bad) { |
| 1828 | /* Check each envp[] */ |
| 1829 | for (i = 0; envp[i]; i++) { |
| 1830 | |
| 1831 | /* Check for bad environment variables and values */ |
| 1832 | #if REMOVE_ENV_LD |
| 1833 | while (envp[i] && (strncmp(envp[i], "LD", 2) == 0)) { |
| 1834 | for (j = i; envp[j]; j++) { |
| 1835 | envp[j] = envp[j + 1]; |
| 1836 | } |
| 1837 | } |
| 1838 | #endif |
| 1839 | if (envp[i] && (strlen(envp[i]) > MAX_ENV_LENGTH)) { |
| 1840 | #if REMOVE_LONG_ENV |
| 1841 | for (j = i; envp[j]; j++) { |
| 1842 | envp[j] = envp[j + 1]; |
| 1843 | } |
| 1844 | i--; |
| 1845 | #else |
| 1846 | char *eq; |
| 1847 | int len; |
| 1848 | |
| 1849 | eq = strchr(envp[i], '='); |
| 1850 | if (!eq) |
| 1851 | continue; |
| 1852 | len = eq - envp[i]; |
| 1853 | e = strndup(envp[i], len); |
| 1854 | if (!e) { |
| 1855 | bad = InternalError; |
| 1856 | break; |
| 1857 | } |
| 1858 | if (len >= 4 && |
| 1859 | (strcmp(e + len - 4, "PATH") == 0 || |
| 1860 | strcmp(e, "TERMCAP") == 0)) { |
| 1861 | if (strlen(envp[i]) > MAX_ENV_PATH_LENGTH) { |
| 1862 | bad = EnvTooLong; |
| 1863 | break; |
| 1864 | } |
| 1865 | else { |
| 1866 | free(e); |
| 1867 | } |
| 1868 | } |
| 1869 | else { |
| 1870 | bad = EnvTooLong; |
| 1871 | break; |
| 1872 | } |
| 1873 | #endif |
| 1874 | } |
| 1875 | } |
| 1876 | } |
| 1877 | #if NO_OUTPUT_PIPES |
| 1878 | if (!bad) { |
| 1879 | struct stat buf; |
| 1880 | |
| 1881 | if (fstat(fileno(stdout), &buf) == 0 && S_ISFIFO(buf.st_mode)) |
| 1882 | bad = OutputIsPipe; |
| 1883 | if (fstat(fileno(stderr), &buf) == 0 && S_ISFIFO(buf.st_mode)) |
| 1884 | bad = OutputIsPipe; |
| 1885 | } |
| 1886 | #endif |
| 1887 | } |
| 1888 | switch (bad) { |
| 1889 | case NotBad: |
| 1890 | return; |
| 1891 | case UnsafeArg: |
| 1892 | ErrorF("Command line argument number %d is unsafe\n", i); |
| 1893 | break; |
| 1894 | case ArgTooLong: |
| 1895 | ErrorF("Command line argument number %d is too long\n", i); |
| 1896 | break; |
| 1897 | case UnprintableArg: |
| 1898 | ErrorF("Command line argument number %d contains unprintable" |
| 1899 | " characters\n", i); |
| 1900 | break; |
| 1901 | case EnvTooLong: |
| 1902 | ErrorF("Environment variable `%s' is too long\n", e); |
| 1903 | break; |
| 1904 | case OutputIsPipe: |
| 1905 | ErrorF("Stdout and/or stderr is a pipe\n"); |
| 1906 | break; |
| 1907 | case InternalError: |
| 1908 | ErrorF("Internal Error\n"); |
| 1909 | break; |
| 1910 | default: |
| 1911 | ErrorF("Unknown error\n"); |
| 1912 | break; |
| 1913 | } |
| 1914 | FatalError("X server aborted because of unsafe environment\n"); |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * CheckUserAuthorization: check if the user is allowed to start the |
| 1919 | * X server. This usually means some sort of PAM checking, and it is |
| 1920 | * usually only done for setuid servers (uid != euid). |
| 1921 | */ |
| 1922 | |
| 1923 | #ifdef USE_PAM |
| 1924 | #include <security/pam_appl.h> |
| 1925 | #include <security/pam_misc.h> |
| 1926 | #include <pwd.h> |
| 1927 | #endif /* USE_PAM */ |
| 1928 | |
| 1929 | void |
| 1930 | CheckUserAuthorization(void) |
| 1931 | { |
| 1932 | #ifdef USE_PAM |
| 1933 | static struct pam_conv conv = { |
| 1934 | misc_conv, |
| 1935 | NULL |
| 1936 | }; |
| 1937 | |
| 1938 | pam_handle_t *pamh = NULL; |
| 1939 | struct passwd *pw; |
| 1940 | int retval; |
| 1941 | |
| 1942 | if (getuid() != geteuid()) { |
| 1943 | pw = getpwuid(getuid()); |
| 1944 | if (pw == NULL) |
| 1945 | FatalError("getpwuid() failed for uid %d\n", getuid()); |
| 1946 | |
| 1947 | retval = pam_start("xserver", pw->pw_name, &conv, &pamh); |
| 1948 | if (retval != PAM_SUCCESS) |
| 1949 | FatalError("pam_start() failed.\n" |
| 1950 | "\tMissing or mangled PAM config file or module?\n"); |
| 1951 | |
| 1952 | retval = pam_authenticate(pamh, 0); |
| 1953 | if (retval != PAM_SUCCESS) { |
| 1954 | pam_end(pamh, retval); |
| 1955 | FatalError("PAM authentication failed, cannot start X server.\n" |
| 1956 | "\tPerhaps you do not have console ownership?\n"); |
| 1957 | } |
| 1958 | |
| 1959 | retval = pam_acct_mgmt(pamh, 0); |
| 1960 | if (retval != PAM_SUCCESS) { |
| 1961 | pam_end(pamh, retval); |
| 1962 | FatalError("PAM authentication failed, cannot start X server.\n" |
| 1963 | "\tPerhaps you do not have console ownership?\n"); |
| 1964 | } |
| 1965 | |
| 1966 | /* this is not a session, so do not do session management */ |
| 1967 | pam_end(pamh, PAM_SUCCESS); |
| 1968 | } |
| 1969 | #endif |
| 1970 | } |
| 1971 | |
| 1972 | /* |
| 1973 | * Tokenize a string into a NULL terminated array of strings. Always returns |
| 1974 | * an allocated array unless an error occurs. |
| 1975 | */ |
| 1976 | char ** |
| 1977 | xstrtokenize(const char *str, const char *separators) |
| 1978 | { |
| 1979 | char **list, **nlist; |
| 1980 | char *tok, *tmp; |
| 1981 | unsigned num = 0, n; |
| 1982 | |
| 1983 | if (!str) |
| 1984 | return NULL; |
| 1985 | list = calloc(1, sizeof(*list)); |
| 1986 | if (!list) |
| 1987 | return NULL; |
| 1988 | tmp = strdup(str); |
| 1989 | if (!tmp) |
| 1990 | goto error; |
| 1991 | for (tok = strtok(tmp, separators); tok; tok = strtok(NULL, separators)) { |
| 1992 | nlist = realloc(list, (num + 2) * sizeof(*list)); |
| 1993 | if (!nlist) |
| 1994 | goto error; |
| 1995 | list = nlist; |
| 1996 | list[num] = strdup(tok); |
| 1997 | if (!list[num]) |
| 1998 | goto error; |
| 1999 | list[++num] = NULL; |
| 2000 | } |
| 2001 | free(tmp); |
| 2002 | return list; |
| 2003 | |
| 2004 | error: |
| 2005 | free(tmp); |
| 2006 | for (n = 0; n < num; n++) |
| 2007 | free(list[n]); |
| 2008 | free(list); |
| 2009 | return NULL; |
| 2010 | } |
| 2011 | |
| 2012 | /* Format a signed number into a string in a signal safe manner. The string |
| 2013 | * should be at least 21 characters in order to handle all int64_t values. |
| 2014 | */ |
| 2015 | void |
| 2016 | FormatInt64(int64_t num, char *string) |
| 2017 | { |
| 2018 | if (num < 0) { |
| 2019 | string[0] = '-'; |
| 2020 | num *= -1; |
| 2021 | string++; |
| 2022 | } |
| 2023 | FormatUInt64(num, string); |
| 2024 | } |
| 2025 | |
| 2026 | /* Format a number into a string in a signal safe manner. The string should be |
| 2027 | * at least 21 characters in order to handle all uint64_t values. */ |
| 2028 | void |
| 2029 | FormatUInt64(uint64_t num, char *string) |
| 2030 | { |
| 2031 | uint64_t divisor; |
| 2032 | int len; |
| 2033 | int i; |
| 2034 | |
| 2035 | for (len = 1, divisor = 10; |
| 2036 | len < 20 && num / divisor; |
| 2037 | len++, divisor *= 10); |
| 2038 | |
| 2039 | for (i = len, divisor = 1; i > 0; i--, divisor *= 10) |
| 2040 | string[i - 1] = '0' + ((num / divisor) % 10); |
| 2041 | |
| 2042 | string[len] = '\0'; |
| 2043 | } |
| 2044 | |
| 2045 | /** |
| 2046 | * Format a double number as %.2f. |
| 2047 | */ |
| 2048 | void |
| 2049 | FormatDouble(double dbl, char *string) |
| 2050 | { |
| 2051 | int slen = 0; |
| 2052 | uint64_t frac; |
| 2053 | |
| 2054 | frac = (dbl > 0 ? dbl : -dbl) * 100.0 + 0.5; |
| 2055 | frac %= 100; |
| 2056 | |
| 2057 | /* write decimal part to string */ |
| 2058 | if (dbl < 0 && dbl > -1) |
| 2059 | string[slen++] = '-'; |
| 2060 | FormatInt64((int64_t)dbl, &string[slen]); |
| 2061 | |
| 2062 | while(string[slen] != '\0') |
| 2063 | slen++; |
| 2064 | |
| 2065 | /* append fractional part, but only if we have enough characters. We |
| 2066 | * expect string to be 21 chars (incl trailing \0) */ |
| 2067 | if (slen <= 17) { |
| 2068 | string[slen++] = '.'; |
| 2069 | if (frac < 10) |
| 2070 | string[slen++] = '0'; |
| 2071 | |
| 2072 | FormatUInt64(frac, &string[slen]); |
| 2073 | } |
| 2074 | } |
| 2075 | |
| 2076 | |
| 2077 | /* Format a number into a hexadecimal string in a signal safe manner. The string |
| 2078 | * should be at least 17 characters in order to handle all uint64_t values. */ |
| 2079 | void |
| 2080 | FormatUInt64Hex(uint64_t num, char *string) |
| 2081 | { |
| 2082 | uint64_t divisor; |
| 2083 | int len; |
| 2084 | int i; |
| 2085 | |
| 2086 | for (len = 1, divisor = 0x10; |
| 2087 | len < 16 && num / divisor; |
| 2088 | len++, divisor *= 0x10); |
| 2089 | |
| 2090 | for (i = len, divisor = 1; i > 0; i--, divisor *= 0x10) { |
| 2091 | int val = (num / divisor) % 0x10; |
| 2092 | |
| 2093 | if (val < 10) |
| 2094 | string[i - 1] = '0' + val; |
| 2095 | else |
| 2096 | string[i - 1] = 'a' + val - 10; |
| 2097 | } |
| 2098 | |
| 2099 | string[len] = '\0'; |
| 2100 | } |
| 2101 | |
| 2102 | /* Move a file descriptor out of the way of our select mask; this |
| 2103 | * is useful for file descriptors which will never appear in the |
| 2104 | * select mask to avoid reducing the number of clients that can |
| 2105 | * connect to the server |
| 2106 | */ |
| 2107 | int |
| 2108 | os_move_fd(int fd) |
| 2109 | { |
| 2110 | int newfd; |
| 2111 | |
| 2112 | #ifdef F_DUPFD_CLOEXEC |
| 2113 | newfd = fcntl(fd, F_DUPFD_CLOEXEC, MAXCLIENTS); |
| 2114 | #else |
| 2115 | newfd = fcntl(fd, F_DUPFD, MAXCLIENTS); |
| 2116 | #endif |
| 2117 | if (newfd < 0) |
| 2118 | return fd; |
| 2119 | #ifndef F_DUPFD_CLOEXEC |
| 2120 | fcntl(newfd, F_SETFD, FD_CLOEXEC); |
| 2121 | #endif |
| 2122 | close(fd); |
| 2123 | return newfd; |
| 2124 | } |