San Mehat | a430b2b | 2014-09-23 08:30:51 -0700 | [diff] [blame] | 1 | /* |
| 2 | Copyright (C) 2002-2010 Karl J. Runge <runge@karlrunge.com> |
| 3 | All rights reserved. |
| 4 | |
| 5 | This file is part of x11vnc. |
| 6 | |
| 7 | x11vnc is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or (at |
| 10 | your option) any later version. |
| 11 | |
| 12 | x11vnc is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with x11vnc; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA |
| 20 | or see <http://www.gnu.org/licenses/>. |
| 21 | |
| 22 | In addition, as a special exception, Karl J. Runge |
| 23 | gives permission to link the code of its release of x11vnc with the |
| 24 | OpenSSL project's "OpenSSL" library (or with modified versions of it |
| 25 | that use the same license as the "OpenSSL" library), and distribute |
| 26 | the linked executables. You must obey the GNU General Public License |
| 27 | in all respects for all of the code used other than "OpenSSL". If you |
| 28 | modify this file, you may extend this exception to your version of the |
| 29 | file, but you are not obligated to do so. If you do not wish to do |
| 30 | so, delete this exception statement from your version. |
| 31 | */ |
| 32 | |
| 33 | /* -- cleanup.c -- */ |
| 34 | |
| 35 | #include "x11vnc.h" |
| 36 | #include "xwrappers.h" |
| 37 | #include "xdamage.h" |
| 38 | #include "remote.h" |
| 39 | #include "keyboard.h" |
| 40 | #include "scan.h" |
| 41 | #include "gui.h" |
| 42 | #include "solid.h" |
| 43 | #include "unixpw.h" |
| 44 | #include "sslcmds.h" |
| 45 | #include "sslhelper.h" |
| 46 | #include "connections.h" |
| 47 | #include "macosx.h" |
| 48 | #include "macosxCG.h" |
| 49 | #include "avahi.h" |
| 50 | #include "screen.h" |
| 51 | #include "xrecord.h" |
| 52 | #include "xevents.h" |
| 53 | #include "uinput.h" |
| 54 | |
| 55 | /* |
| 56 | * Exiting and error handling routines |
| 57 | */ |
| 58 | |
| 59 | int trapped_xerror = 0; |
| 60 | int trapped_xioerror = 0; |
| 61 | int trapped_getimage_xerror = 0; |
| 62 | int trapped_record_xerror = 0; |
| 63 | XErrorEvent *trapped_xerror_event; |
| 64 | |
| 65 | /* XXX CHECK BEFORE RELEASE */ |
| 66 | int crash_debug = 0; |
| 67 | |
| 68 | void clean_shm(int quick); |
| 69 | void clean_up_exit(int ret); |
| 70 | int trap_xerror(Display *d, XErrorEvent *error); |
| 71 | int trap_xioerror(Display *d); |
| 72 | int trap_getimage_xerror(Display *d, XErrorEvent *error); |
| 73 | char *xerror_string(XErrorEvent *error); |
| 74 | void initialize_crash_handler(void); |
| 75 | void initialize_signals(void); |
| 76 | void unset_signals(void); |
| 77 | void close_exec_fds(void); |
| 78 | int known_sigpipe_mode(char *s); |
| 79 | |
| 80 | |
| 81 | static int exit_flag = 0; |
| 82 | static int exit_sig = 0; |
| 83 | |
| 84 | static void clean_icon_mode(void); |
| 85 | static int Xerror(Display *d, XErrorEvent *error); |
| 86 | static int XIOerr(Display *d); |
| 87 | static void crash_shell_help(void); |
| 88 | static void crash_shell(void); |
| 89 | static void interrupted (int sig); |
| 90 | |
| 91 | |
| 92 | void clean_shm(int quick) { |
| 93 | int i, cnt = 0; |
| 94 | |
| 95 | /* |
| 96 | * to avoid deadlock, etc, under quick=1 we just delete the shm |
| 97 | * areas and leave the X stuff hanging. |
| 98 | */ |
| 99 | if (quick) { |
| 100 | shm_delete(&scanline_shm); |
| 101 | shm_delete(&fullscreen_shm); |
| 102 | shm_delete(&snaprect_shm); |
| 103 | } else { |
| 104 | shm_clean(&scanline_shm, scanline); |
| 105 | shm_clean(&fullscreen_shm, fullscreen); |
| 106 | shm_clean(&snaprect_shm, snaprect); |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Here we have to clean up quite a few shm areas for all |
| 111 | * the possible tile row runs (40 for 1280), not as robust |
| 112 | * as one might like... sometimes need to run ipcrm(1). |
| 113 | */ |
| 114 | for(i=1; i<=ntiles_x; i++) { |
| 115 | if (i > tile_shm_count) { |
| 116 | break; |
| 117 | } |
| 118 | if (quick) { |
| 119 | shm_delete(&tile_row_shm[i]); |
| 120 | } else { |
| 121 | shm_clean(&tile_row_shm[i], tile_row[i]); |
| 122 | } |
| 123 | cnt++; |
| 124 | if (single_copytile_count && i >= single_copytile_count) { |
| 125 | break; |
| 126 | } |
| 127 | } |
| 128 | if (!quiet && cnt > 0) { |
| 129 | rfbLog("deleted %d tile_row polling images.\n", cnt); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | static void clean_icon_mode(void) { |
| 134 | if (icon_mode && icon_mode_fh) { |
| 135 | fprintf(icon_mode_fh, "quit\n"); |
| 136 | fflush(icon_mode_fh); |
| 137 | fclose(icon_mode_fh); |
| 138 | icon_mode_fh = NULL; |
| 139 | if (icon_mode_file) { |
| 140 | unlink(icon_mode_file); |
| 141 | icon_mode_file = NULL; |
| 142 | } |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Normal exiting |
| 148 | */ |
| 149 | void clean_up_exit(int ret) { |
| 150 | static int depth = 0; |
| 151 | exit_flag = 1; |
| 152 | |
| 153 | if (depth++ > 2) { |
| 154 | exit(ret); |
| 155 | } |
| 156 | |
| 157 | if (icon_mode) { |
| 158 | clean_icon_mode(); |
| 159 | } |
| 160 | |
| 161 | /* remove the shm areas: */ |
| 162 | clean_shm(0); |
| 163 | |
| 164 | stop_stunnel(); |
| 165 | if (use_openssl) { |
| 166 | ssl_helper_pid(0, 0); /* killall */ |
| 167 | } |
| 168 | |
| 169 | if (ssh_pid > 0) { |
| 170 | kill(ssh_pid, SIGTERM); |
| 171 | ssh_pid = 0; |
| 172 | } |
| 173 | |
| 174 | #ifdef MACOSX |
| 175 | if (client_connect_file) { |
| 176 | if (strstr(client_connect_file, "/tmp/x11vnc-macosx-remote") |
| 177 | == client_connect_file) { |
| 178 | unlink(client_connect_file); |
| 179 | } |
| 180 | } |
| 181 | if (macosx_console) { |
| 182 | macosxCG_fini(); |
| 183 | } |
| 184 | #endif |
| 185 | |
| 186 | if (pipeinput_fh != NULL) { |
| 187 | pclose(pipeinput_fh); |
| 188 | pipeinput_fh = NULL; |
| 189 | } |
| 190 | |
| 191 | shutdown_uinput(); |
| 192 | |
| 193 | if (unix_sock) { |
| 194 | if (unix_sock_fd >= 0) { |
| 195 | rfbLog("deleting unix sock: %s\n", unix_sock); |
| 196 | close(unix_sock_fd); |
| 197 | unix_sock_fd = -1; |
| 198 | unlink(unix_sock); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | if (! dpy) { /* raw_rb hack */ |
| 203 | if (rm_flagfile) { |
| 204 | unlink(rm_flagfile); |
| 205 | rm_flagfile = NULL; |
| 206 | } |
| 207 | exit(ret); |
| 208 | } |
| 209 | |
| 210 | /* X keyboard cleanups */ |
| 211 | delete_added_keycodes(0); |
| 212 | |
| 213 | if (clear_mods == 1) { |
| 214 | clear_modifiers(0); |
| 215 | } else if (clear_mods == 2) { |
| 216 | clear_keys(); |
| 217 | } else if (clear_mods == 3) { |
| 218 | clear_keys(); |
| 219 | clear_locks(); |
| 220 | } |
| 221 | |
| 222 | if (no_autorepeat) { |
| 223 | autorepeat(1, 0); |
| 224 | } |
| 225 | if (use_solid_bg) { |
| 226 | solid_bg(1); |
| 227 | } |
| 228 | if (ncache || ncache0) { |
| 229 | kde_no_animate(1); |
| 230 | } |
| 231 | X_LOCK; |
| 232 | XTestDiscard_wr(dpy); |
| 233 | #if LIBVNCSERVER_HAVE_LIBXDAMAGE |
| 234 | if (xdamage) { |
| 235 | XDamageDestroy(dpy, xdamage); |
| 236 | } |
| 237 | #endif |
| 238 | #if LIBVNCSERVER_HAVE_LIBXTRAP |
| 239 | if (trap_ctx) { |
| 240 | XEFreeTC(trap_ctx); |
| 241 | } |
| 242 | #endif |
| 243 | /* XXX rdpy_ctrl, etc. cannot close w/o blocking */ |
| 244 | XCloseDisplay_wr(dpy); |
| 245 | X_UNLOCK; |
| 246 | |
| 247 | fflush(stderr); |
| 248 | |
| 249 | if (rm_flagfile) { |
| 250 | unlink(rm_flagfile); |
| 251 | rm_flagfile = NULL; |
| 252 | } |
| 253 | |
| 254 | if (avahi) { |
| 255 | avahi_cleanup(); |
| 256 | fflush(stderr); |
| 257 | } |
| 258 | |
| 259 | exit(ret); |
| 260 | } |
| 261 | |
| 262 | /* X11 error handlers */ |
| 263 | |
| 264 | static XErrorHandler Xerror_def; |
| 265 | static XIOErrorHandler XIOerr_def; |
| 266 | |
| 267 | int trap_xerror(Display *d, XErrorEvent *error) { |
| 268 | trapped_xerror = 1; |
| 269 | trapped_xerror_event = error; |
| 270 | |
| 271 | if (d) {} /* unused vars warning: */ |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | int trap_xioerror(Display *d) { |
| 277 | trapped_xioerror = 1; |
| 278 | |
| 279 | if (d) {} /* unused vars warning: */ |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | int trap_getimage_xerror(Display *d, XErrorEvent *error) { |
| 285 | trapped_getimage_xerror = 1; |
| 286 | trapped_xerror_event = error; |
| 287 | |
| 288 | if (d) {} /* unused vars warning: */ |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* Are silly Xorg people removing X_ShmAttach from XShm.h? */ |
| 294 | /* INDEED! What stupid, myopic morons... */ |
| 295 | /* Maintenance Monkeys busy typing at their keyboards... */ |
| 296 | #ifndef X_ShmAttach |
| 297 | #define X_ShmAttach 1 |
| 298 | #endif |
| 299 | |
| 300 | static int Xerror(Display *d, XErrorEvent *error) { |
| 301 | X_UNLOCK; |
| 302 | |
| 303 | if (getenv("X11VNC_PRINT_XERROR")) { |
| 304 | fprintf(stderr, "Xerror: major_opcode: %d minor_opcode: %d error_code: %d\n", |
| 305 | error->request_code, error->minor_code, error->error_code); |
| 306 | } |
| 307 | |
| 308 | if (xshm_opcode > 0 && error->request_code == xshm_opcode) { |
| 309 | if (error->minor_code == X_ShmAttach) { |
| 310 | char *dstr = DisplayString(dpy); |
| 311 | fprintf(stderr, "\nX11 MIT Shared Memory Attach failed:\n"); |
| 312 | fprintf(stderr, " Is your DISPLAY=%s on a remote machine?\n", dstr); |
| 313 | if (strstr(dstr, "localhost:")) { |
| 314 | fprintf(stderr, " Note: DISPLAY=localhost:N suggests a SSH X11 redir to a remote machine.\n"); |
| 315 | } else if (dstr[0] != ':') { |
| 316 | fprintf(stderr, " Note: DISPLAY=hostname:N suggests a remote display.\n"); |
| 317 | } |
| 318 | fprintf(stderr, " Suggestion, use: x11vnc -display :0 ... for local display :0\n\n"); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | interrupted(0); |
| 323 | |
| 324 | if (d) {} /* unused vars warning: */ |
| 325 | |
| 326 | return (*Xerror_def)(d, error); |
| 327 | } |
| 328 | |
| 329 | void watch_loop(void); |
| 330 | |
| 331 | static int XIOerr(Display *d) { |
| 332 | static int reopen = 0, rmax = 1; |
| 333 | X_UNLOCK; |
| 334 | |
| 335 | if (getenv("X11VNC_REOPEN_DISPLAY")) { |
| 336 | rmax = atoi(getenv("X11VNC_REOPEN_DISPLAY")); |
| 337 | } |
| 338 | |
| 339 | #if !NO_X11 |
| 340 | if (reopen < rmax && getenv("X11VNC_REOPEN_DISPLAY")) { |
| 341 | int db = getenv("X11VNC_REOPEN_DEBUG") ? 1 : 0; |
| 342 | int sleepmax = 10, i; |
| 343 | Display *save_dpy = dpy; |
| 344 | char *dstr = strdup(DisplayString(save_dpy)); |
| 345 | reopen++; |
| 346 | if (getenv("X11VNC_REOPEN_SLEEP_MAX")) { |
| 347 | sleepmax = atoi(getenv("X11VNC_REOPEN_SLEEP_MAX")); |
| 348 | } |
| 349 | rfbLog("*** XIO error: Trying to reopen[%d/%d] display '%s'\n", reopen, rmax, dstr); |
| 350 | rfbLog("*** XIO error: Note the reopened state may be unstable.\n"); |
| 351 | for (i=0; i < sleepmax; i++) { |
| 352 | usleep (1000 * 1000); |
| 353 | dpy = XOpenDisplay_wr(dstr); |
| 354 | rfbLog("dpy[%d/%d]: %p\n", i+1, sleepmax, dpy); |
| 355 | if (dpy) { |
| 356 | break; |
| 357 | } |
| 358 | } |
| 359 | last_open_xdisplay = time(NULL); |
| 360 | if (dpy) { |
| 361 | rfbLog("*** XIO error: Reopened display '%s' successfully.\n", dstr); |
| 362 | if (db) rfbLog("*** XIO error: '%s' 0x%x\n", dstr, dpy); |
| 363 | scr = DefaultScreen(dpy); |
| 364 | rootwin = RootWindow(dpy, scr); |
| 365 | if (db) rfbLog("*** XIO error: disable_grabserver\n"); |
| 366 | disable_grabserver(dpy, 0); |
| 367 | if (db) rfbLog("*** XIO error: xrecord\n"); |
| 368 | zerodisp_xrecord(); |
| 369 | initialize_xrecord(); |
| 370 | if (db) rfbLog("*** XIO error: xdamage\n"); |
| 371 | create_xdamage_if_needed(1); |
| 372 | if (db) rfbLog("*** XIO error: do_new_fb\n"); |
| 373 | if (using_shm) { |
| 374 | if (db) rfbLog("*** XIO error: clean_shm\n"); |
| 375 | clean_shm(1); |
| 376 | } |
| 377 | do_new_fb(1); |
| 378 | if (db) rfbLog("*** XIO error: check_xevents\n"); |
| 379 | check_xevents(1); |
| 380 | |
| 381 | /* sadly, we can never return... */ |
| 382 | if (db) rfbLog("*** XIO error: watch_loop\n"); |
| 383 | watch_loop(); |
| 384 | clean_up_exit(1); |
| 385 | } |
| 386 | } |
| 387 | #endif |
| 388 | |
| 389 | interrupted(-1); |
| 390 | |
| 391 | if (d) {} /* unused vars warning: */ |
| 392 | |
| 393 | return (*XIOerr_def)(d); |
| 394 | } |
| 395 | |
| 396 | static char *xerrors[] = { |
| 397 | "Success", |
| 398 | "BadRequest", |
| 399 | "BadValue", |
| 400 | "BadWindow", |
| 401 | "BadPixmap", |
| 402 | "BadAtom", |
| 403 | "BadCursor", |
| 404 | "BadFont", |
| 405 | "BadMatch", |
| 406 | "BadDrawable", |
| 407 | "BadAccess", |
| 408 | "BadAlloc", |
| 409 | "BadColor", |
| 410 | "BadGC", |
| 411 | "BadIDChoice", |
| 412 | "BadName", |
| 413 | "BadLength", |
| 414 | "BadImplementation", |
| 415 | "unknown" |
| 416 | }; |
| 417 | static int xerrors_max = BadImplementation; |
| 418 | |
| 419 | char *xerror_string(XErrorEvent *error) { |
| 420 | int index = -1; |
| 421 | if (error) { |
| 422 | index = (int) error->error_code; |
| 423 | } |
| 424 | if (0 <= index && index <= xerrors_max) { |
| 425 | return xerrors[index]; |
| 426 | } else { |
| 427 | return xerrors[xerrors_max+1]; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | static char *crash_stack_command1 = NULL; |
| 432 | static char *crash_stack_command2 = NULL; |
| 433 | static char *crash_debug_command = NULL; |
| 434 | |
| 435 | void initialize_crash_handler(void) { |
| 436 | int pid = program_pid; |
| 437 | crash_stack_command1 = (char *) malloc(1000); |
| 438 | crash_stack_command2 = (char *) malloc(1000); |
| 439 | crash_debug_command = (char *) malloc(1000); |
| 440 | |
| 441 | snprintf(crash_stack_command1, 500, "echo where > /tmp/gdb.%d;" |
| 442 | " env PATH=$PATH:/usr/local/bin:/usr/sfw/bin:/usr/bin" |
| 443 | " gdb -x /tmp/gdb.%d -batch -n %s %d;" |
| 444 | " rm -f /tmp/gdb.%d", pid, pid, program_name, pid, pid); |
| 445 | snprintf(crash_stack_command2, 500, "pstack %d", program_pid); |
| 446 | |
| 447 | snprintf(crash_debug_command, 500, "gdb %s %d", program_name, pid); |
| 448 | } |
| 449 | |
| 450 | static void crash_shell_help(void) { |
| 451 | int pid = program_pid; |
| 452 | fprintf(stderr, "\n"); |
| 453 | fprintf(stderr, " *** Welcome to the x11vnc crash shell! ***\n"); |
| 454 | fprintf(stderr, "\n"); |
| 455 | fprintf(stderr, "PROGRAM: %s PID: %d\n", program_name, pid); |
| 456 | fprintf(stderr, "\n"); |
| 457 | fprintf(stderr, "POSSIBLE DEBUGGER COMMAND:\n"); |
| 458 | fprintf(stderr, "\n"); |
| 459 | fprintf(stderr, " %s\n", crash_debug_command); |
| 460 | fprintf(stderr, "\n"); |
| 461 | fprintf(stderr, "Press \"q\" to quit.\n"); |
| 462 | fprintf(stderr, "Press \"h\" or \"?\" for this help.\n"); |
| 463 | fprintf(stderr, "Press \"s\" to try to run some commands to" |
| 464 | " show a stack trace (gdb/pstack).\n"); |
| 465 | fprintf(stderr, "\n"); |
| 466 | fprintf(stderr, "Anything else is passed to -Q query function.\n"); |
| 467 | fprintf(stderr, "\n"); |
| 468 | } |
| 469 | |
| 470 | static void crash_shell(void) { |
| 471 | char qry[1000], cmd[1000], line[1000]; |
| 472 | char *str, *p; |
| 473 | |
| 474 | crash_shell_help(); |
| 475 | fprintf(stderr, "\ncrash> "); |
| 476 | while (fgets(line, 1000, stdin) != NULL) { |
| 477 | str = lblanks(line); |
| 478 | |
| 479 | p = str; |
| 480 | while(*p) { |
| 481 | if (*p == '\n') { |
| 482 | *p = '\0'; |
| 483 | } |
| 484 | p++; |
| 485 | } |
| 486 | |
| 487 | if (*str == 'q' && *(str+1) == '\0') { |
| 488 | fprintf(stderr, "quiting.\n"); |
| 489 | return; |
| 490 | } else if (*str == 'h' && *(str+1) == '\0') { |
| 491 | crash_shell_help(); |
| 492 | } else if (*str == '?' && *(str+1) == '\0') { |
| 493 | crash_shell_help(); |
| 494 | } else if (*str == 's' && *(str+1) == '\0') { |
| 495 | sprintf(cmd, "sh -c '(%s) &'", crash_stack_command1); |
| 496 | /* crash */ |
| 497 | if (no_external_cmds || !cmd_ok("crash")) { |
| 498 | fprintf(stderr, "\nno_external_cmds=%d\n", |
| 499 | no_external_cmds); |
| 500 | goto crash_prompt; |
| 501 | } |
| 502 | fprintf(stderr, "\nrunning:\n\t%s\n\n", |
| 503 | crash_stack_command1); |
| 504 | system(cmd); |
| 505 | usleep(1000*1000); |
| 506 | |
| 507 | sprintf(cmd, "sh -c '(%s) &'", crash_stack_command2); |
| 508 | fprintf(stderr, "\nrunning:\n\t%s\n\n", |
| 509 | crash_stack_command2); |
| 510 | system(cmd); |
| 511 | usleep(1000*1000); |
| 512 | } else { |
| 513 | snprintf(qry, 1000, "qry=%s", str); |
| 514 | p = process_remote_cmd(qry, 1); |
| 515 | fprintf(stderr, "\n\nresult:\n%s\n", p); |
| 516 | free(p); |
| 517 | } |
| 518 | |
| 519 | crash_prompt: |
| 520 | fprintf(stderr, "crash> "); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * General problem handler |
| 526 | */ |
| 527 | static void interrupted (int sig) { |
| 528 | exit_sig = sig; |
| 529 | if (exit_flag) { |
| 530 | fprintf(stderr, "extra[%d] signal: %d\n", exit_flag, sig); |
| 531 | exit_flag++; |
| 532 | if (use_threads) { |
| 533 | usleep2(250 * 1000); |
| 534 | } else if (exit_flag <= 2) { |
| 535 | return; |
| 536 | } |
| 537 | if (rm_flagfile) { |
| 538 | unlink(rm_flagfile); |
| 539 | rm_flagfile = NULL; |
| 540 | } |
| 541 | exit(4); |
| 542 | } |
| 543 | exit_flag++; |
| 544 | if (sig == 0) { |
| 545 | fprintf(stderr, "caught X11 error:\n"); |
| 546 | if (crash_debug) { crash_shell(); } |
| 547 | } else if (sig == -1) { |
| 548 | fprintf(stderr, "caught XIO error:\n"); |
| 549 | } else { |
| 550 | fprintf(stderr, "caught signal: %d\n", sig); |
| 551 | } |
| 552 | if (sig == SIGINT) { |
| 553 | shut_down = 1; |
| 554 | return; |
| 555 | } |
| 556 | |
| 557 | if (crash_debug) { |
| 558 | crash_shell(); |
| 559 | } |
| 560 | |
| 561 | X_UNLOCK; |
| 562 | |
| 563 | if (icon_mode) { |
| 564 | clean_icon_mode(); |
| 565 | } |
| 566 | /* remove the shm areas with quick=1: */ |
| 567 | clean_shm(1); |
| 568 | |
| 569 | if (sig == -1) { |
| 570 | /* not worth trying any more cleanup, X server probably gone */ |
| 571 | if (rm_flagfile) { |
| 572 | unlink(rm_flagfile); |
| 573 | rm_flagfile = NULL; |
| 574 | } |
| 575 | exit(3); |
| 576 | } |
| 577 | |
| 578 | /* X keyboard cleanups */ |
| 579 | delete_added_keycodes(0); |
| 580 | |
| 581 | if (clear_mods == 1) { |
| 582 | clear_modifiers(0); |
| 583 | } else if (clear_mods == 2) { |
| 584 | clear_keys(); |
| 585 | } else if (clear_mods == 3) { |
| 586 | clear_keys(); |
| 587 | clear_locks(); |
| 588 | } |
| 589 | if (no_autorepeat) { |
| 590 | autorepeat(1, 0); |
| 591 | } |
| 592 | if (use_solid_bg) { |
| 593 | solid_bg(1); |
| 594 | } |
| 595 | if (ncache || ncache0) { |
| 596 | kde_no_animate(1); |
| 597 | } |
| 598 | stop_stunnel(); |
| 599 | |
| 600 | if (crash_debug) { |
| 601 | crash_shell(); |
| 602 | } |
| 603 | |
| 604 | if (sig) { |
| 605 | if (rm_flagfile) { |
| 606 | unlink(rm_flagfile); |
| 607 | rm_flagfile = NULL; |
| 608 | } |
| 609 | exit(2); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | static void ignore_sigs(char *list) { |
| 614 | char *str, *p; |
| 615 | int ignore = 1; |
| 616 | if (list == NULL || *list == '\0') { |
| 617 | return; |
| 618 | } |
| 619 | str = strdup(list); |
| 620 | p = strtok(str, ":,"); |
| 621 | |
| 622 | #define SETSIG(x, y) \ |
| 623 | if (strstr(p, x)) { \ |
| 624 | if (ignore) { \ |
| 625 | signal(y, SIG_IGN); \ |
| 626 | } else { \ |
| 627 | signal(y, interrupted); \ |
| 628 | } \ |
| 629 | } |
| 630 | |
| 631 | #ifdef SIG_IGN |
| 632 | while (p) { |
| 633 | if (!strcmp(p, "ignore")) { |
| 634 | ignore = 1; |
| 635 | } else if (!strcmp(p, "exit")) { |
| 636 | ignore = 0; |
| 637 | } |
| 638 | /* Take off every 'sig' ;-) */ |
| 639 | #ifdef SIGHUP |
| 640 | SETSIG("HUP", SIGHUP); |
| 641 | #endif |
| 642 | #ifdef SIGINT |
| 643 | SETSIG("INT", SIGINT); |
| 644 | #endif |
| 645 | #ifdef SIGQUIT |
| 646 | SETSIG("QUIT", SIGQUIT); |
| 647 | #endif |
| 648 | #ifdef SIGTRAP |
| 649 | SETSIG("TRAP", SIGTRAP); |
| 650 | #endif |
| 651 | #ifdef SIGABRT |
| 652 | SETSIG("ABRT", SIGABRT); |
| 653 | #endif |
| 654 | #ifdef SIGBUS |
| 655 | SETSIG("BUS", SIGBUS); |
| 656 | #endif |
| 657 | #ifdef SIGFPE |
| 658 | SETSIG("FPE", SIGFPE); |
| 659 | #endif |
| 660 | #ifdef SIGSEGV |
| 661 | SETSIG("SEGV", SIGSEGV); |
| 662 | #endif |
| 663 | #ifdef SIGPIPE |
| 664 | SETSIG("PIPE", SIGPIPE); |
| 665 | #endif |
| 666 | #ifdef SIGTERM |
| 667 | SETSIG("TERM", SIGTERM); |
| 668 | #endif |
| 669 | #ifdef SIGUSR1 |
| 670 | SETSIG("USR1", SIGUSR1); |
| 671 | #endif |
| 672 | #ifdef SIGUSR2 |
| 673 | SETSIG("USR2", SIGUSR2); |
| 674 | #endif |
| 675 | #ifdef SIGCONT |
| 676 | SETSIG("CONT", SIGCONT); |
| 677 | #endif |
| 678 | #ifdef SIGSTOP |
| 679 | SETSIG("STOP", SIGSTOP); |
| 680 | #endif |
| 681 | #ifdef SIGTSTP |
| 682 | SETSIG("TSTP", SIGTSTP); |
| 683 | #endif |
| 684 | p = strtok(NULL, ":,"); |
| 685 | } |
| 686 | #endif /* SIG_IGN */ |
| 687 | free(str); |
| 688 | } |
| 689 | |
| 690 | /* signal handlers */ |
| 691 | void initialize_signals(void) { |
| 692 | signal(SIGHUP, interrupted); |
| 693 | signal(SIGINT, interrupted); |
| 694 | signal(SIGQUIT, interrupted); |
| 695 | signal(SIGABRT, interrupted); |
| 696 | signal(SIGTERM, interrupted); |
| 697 | signal(SIGBUS, interrupted); |
| 698 | signal(SIGSEGV, interrupted); |
| 699 | signal(SIGFPE, interrupted); |
| 700 | |
| 701 | if (!sigpipe || *sigpipe == '\0' || !strcmp(sigpipe, "skip")) { |
| 702 | ; |
| 703 | } else if (strstr(sigpipe, "ignore:") == sigpipe) { |
| 704 | ignore_sigs(sigpipe); |
| 705 | } else if (strstr(sigpipe, "exit:") == sigpipe) { |
| 706 | ignore_sigs(sigpipe); |
| 707 | } else if (!strcmp(sigpipe, "ignore")) { |
| 708 | #ifdef SIG_IGN |
| 709 | signal(SIGPIPE, SIG_IGN); |
| 710 | #endif |
| 711 | } else if (!strcmp(sigpipe, "exit")) { |
| 712 | rfbLog("initialize_signals: will exit on SIGPIPE\n"); |
| 713 | signal(SIGPIPE, interrupted); |
| 714 | } |
| 715 | |
| 716 | #if NO_X11 |
| 717 | return; |
| 718 | #else |
| 719 | X_LOCK; |
| 720 | Xerror_def = XSetErrorHandler(Xerror); |
| 721 | XIOerr_def = XSetIOErrorHandler(XIOerr); |
| 722 | X_UNLOCK; |
| 723 | #endif /* NO_X11 */ |
| 724 | } |
| 725 | |
| 726 | void unset_signals(void) { |
| 727 | signal(SIGHUP, SIG_DFL); |
| 728 | signal(SIGINT, SIG_DFL); |
| 729 | signal(SIGQUIT, SIG_DFL); |
| 730 | signal(SIGABRT, SIG_DFL); |
| 731 | signal(SIGTERM, SIG_DFL); |
| 732 | signal(SIGBUS, SIG_DFL); |
| 733 | signal(SIGSEGV, SIG_DFL); |
| 734 | signal(SIGFPE, SIG_DFL); |
| 735 | signal(SIGPIPE, SIG_DFL); |
| 736 | } |
| 737 | |
| 738 | void close_exec_fds(void) { |
| 739 | int fd; |
| 740 | #ifdef FD_CLOEXEC |
| 741 | for (fd = 3; fd < 64; fd++) { |
| 742 | int flags = fcntl(fd, F_GETFD); |
| 743 | if (flags != -1) { |
| 744 | flags |= FD_CLOEXEC; |
| 745 | fcntl(fd, F_SETFD, flags); |
| 746 | } |
| 747 | } |
| 748 | #endif |
| 749 | } |
| 750 | |
| 751 | int known_sigpipe_mode(char *s) { |
| 752 | /* |
| 753 | * skip, ignore, exit |
| 754 | */ |
| 755 | if (strstr(s, "ignore:") == s) { |
| 756 | return 1; |
| 757 | } |
| 758 | if (strstr(s, "exit:") == s) { |
| 759 | return 1; |
| 760 | } |
| 761 | if (strcmp(s, "skip") && strcmp(s, "ignore") && |
| 762 | strcmp(s, "exit")) { |
| 763 | return 0; |
| 764 | } else { |
| 765 | return 1; |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | |