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 | /* -- user.c -- */ |
| 34 | |
| 35 | #include "x11vnc.h" |
| 36 | #include "solid.h" |
| 37 | #include "cleanup.h" |
| 38 | #include "scan.h" |
| 39 | #include "screen.h" |
| 40 | #include "unixpw.h" |
| 41 | #include "sslhelper.h" |
| 42 | #include "xwrappers.h" |
| 43 | #include "connections.h" |
| 44 | #include "inet.h" |
| 45 | #include "keyboard.h" |
| 46 | #include "cursor.h" |
| 47 | #include "remote.h" |
| 48 | #include "sslhelper.h" |
| 49 | #include "avahi.h" |
| 50 | |
| 51 | void check_switched_user(void); |
| 52 | void lurk_loop(char *str); |
| 53 | int switch_user(char *user, int fb_mode); |
| 54 | int read_passwds(char *passfile); |
| 55 | void install_passwds(void); |
| 56 | void check_new_passwds(int force); |
| 57 | void progress_client(void); |
| 58 | int wait_for_client(int *argc, char** argv, int http); |
| 59 | rfbBool custom_passwd_check(rfbClientPtr cl, const char *response, int len); |
| 60 | char *xdmcp_insert = NULL; |
| 61 | |
| 62 | static void switch_user_task_dummy(void); |
| 63 | static void switch_user_task_solid_bg(void); |
| 64 | static char *get_login_list(int with_display); |
| 65 | static char **user_list(char *user_str); |
| 66 | static void user2uid(char *user, uid_t *uid, gid_t *gid, char **name, char **home); |
| 67 | static int lurk(char **users); |
| 68 | static int guess_user_and_switch(char *str, int fb_mode); |
| 69 | static int try_user_and_display(uid_t uid, gid_t gid, char *dpystr); |
| 70 | static int switch_user_env(uid_t uid, gid_t gid, char *name, char *home, int fb_mode); |
| 71 | static void try_to_switch_users(void); |
| 72 | |
| 73 | |
| 74 | /* tasks for after we switch */ |
| 75 | static void switch_user_task_dummy(void) { |
| 76 | ; /* dummy does nothing */ |
| 77 | } |
| 78 | static void switch_user_task_solid_bg(void) { |
| 79 | /* we have switched users, some things to do. */ |
| 80 | if (use_solid_bg && client_count) { |
| 81 | solid_bg(0); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | void check_switched_user(void) { |
| 86 | static time_t sched_switched_user = 0; |
| 87 | static int did_solid = 0; |
| 88 | static int did_dummy = 0; |
| 89 | int delay = 15; |
| 90 | time_t now = time(NULL); |
| 91 | |
| 92 | if (unixpw_in_progress) return; |
| 93 | |
| 94 | if (started_as_root == 1 && users_list) { |
| 95 | try_to_switch_users(); |
| 96 | if (started_as_root == 2) { |
| 97 | /* |
| 98 | * schedule the switch_user_tasks() call |
| 99 | * 15 secs is for piggy desktops to start up. |
| 100 | * might not be enough for slow machines... |
| 101 | */ |
| 102 | sched_switched_user = now; |
| 103 | did_dummy = 0; |
| 104 | did_solid = 0; |
| 105 | /* add other activities */ |
| 106 | } |
| 107 | } |
| 108 | if (! sched_switched_user) { |
| 109 | return; |
| 110 | } |
| 111 | |
| 112 | if (! did_dummy) { |
| 113 | switch_user_task_dummy(); |
| 114 | did_dummy = 1; |
| 115 | } |
| 116 | if (! did_solid) { |
| 117 | int doit = 0; |
| 118 | char *ss = solid_str; |
| 119 | if (now >= sched_switched_user + delay) { |
| 120 | doit = 1; |
| 121 | } else if (ss && strstr(ss, "root:") == ss) { |
| 122 | if (now >= sched_switched_user + 3) { |
| 123 | doit = 1; |
| 124 | } |
| 125 | } else if (strcmp("root", guess_desktop())) { |
| 126 | usleep(1000 * 1000); |
| 127 | doit = 1; |
| 128 | } |
| 129 | if (doit) { |
| 130 | switch_user_task_solid_bg(); |
| 131 | did_solid = 1; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | if (did_dummy && did_solid) { |
| 136 | sched_switched_user = 0; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* utilities for switching users */ |
| 141 | static char *get_login_list(int with_display) { |
| 142 | char *out; |
| 143 | #if LIBVNCSERVER_HAVE_UTMPX_H |
| 144 | int i, cnt, max = 200, ut_namesize = 32; |
| 145 | int dpymax = 1000, sawdpy[1000]; |
| 146 | struct utmpx *utx; |
| 147 | |
| 148 | /* size based on "username:999," * max */ |
| 149 | out = (char *) malloc(max * (ut_namesize+1+3+1) + 1); |
| 150 | out[0] = '\0'; |
| 151 | |
| 152 | for (i=0; i<dpymax; i++) { |
| 153 | sawdpy[i] = 0; |
| 154 | } |
| 155 | |
| 156 | setutxent(); |
| 157 | cnt = 0; |
| 158 | while (1) { |
| 159 | char *user, *line, *host, *id; |
| 160 | char tmp[10]; |
| 161 | int d = -1; |
| 162 | utx = getutxent(); |
| 163 | if (! utx) { |
| 164 | break; |
| 165 | } |
| 166 | if (utx->ut_type != USER_PROCESS) { |
| 167 | continue; |
| 168 | } |
| 169 | user = lblanks(utx->ut_user); |
| 170 | if (*user == '\0') { |
| 171 | continue; |
| 172 | } |
| 173 | if (strchr(user, ',')) { |
| 174 | continue; /* unlikely, but comma is our sep. */ |
| 175 | } |
| 176 | |
| 177 | line = lblanks(utx->ut_line); |
| 178 | host = lblanks(utx->ut_host); |
| 179 | id = lblanks(utx->ut_id); |
| 180 | |
| 181 | if (with_display) { |
| 182 | if (0 && line[0] != ':' && strcmp(line, "dtlocal")) { |
| 183 | /* XXX useful? */ |
| 184 | continue; |
| 185 | } |
| 186 | |
| 187 | if (line[0] == ':') { |
| 188 | if (sscanf(line, ":%d", &d) != 1) { |
| 189 | d = -1; |
| 190 | } |
| 191 | } |
| 192 | if (d < 0 && host[0] == ':') { |
| 193 | if (sscanf(host, ":%d", &d) != 1) { |
| 194 | d = -1; |
| 195 | } |
| 196 | } |
| 197 | if (d < 0 && id[0] == ':') { |
| 198 | if (sscanf(id, ":%d", &d) != 1) { |
| 199 | d = -1; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | if (d < 0 || d >= dpymax || sawdpy[d]) { |
| 204 | continue; |
| 205 | } |
| 206 | sawdpy[d] = 1; |
| 207 | sprintf(tmp, ":%d", d); |
| 208 | } else { |
| 209 | /* try to eliminate repeats */ |
| 210 | int repeat = 0; |
| 211 | char *q; |
| 212 | |
| 213 | q = out; |
| 214 | while ((q = strstr(q, user)) != NULL) { |
| 215 | char *p = q + strlen(user) + strlen(":DPY"); |
| 216 | if (q == out || *(q-1) == ',') { |
| 217 | /* bounded on left. */ |
| 218 | if (*p == ',' || *p == '\0') { |
| 219 | /* bounded on right. */ |
| 220 | repeat = 1; |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | q = p; |
| 225 | } |
| 226 | if (repeat) { |
| 227 | continue; |
| 228 | } |
| 229 | sprintf(tmp, ":DPY"); |
| 230 | } |
| 231 | |
| 232 | if (*out) { |
| 233 | strcat(out, ","); |
| 234 | } |
| 235 | strcat(out, user); |
| 236 | strcat(out, tmp); |
| 237 | |
| 238 | cnt++; |
| 239 | if (cnt >= max) { |
| 240 | break; |
| 241 | } |
| 242 | } |
| 243 | endutxent(); |
| 244 | #else |
| 245 | out = strdup(""); |
| 246 | #endif |
| 247 | return out; |
| 248 | } |
| 249 | |
| 250 | static char **user_list(char *user_str) { |
| 251 | int n, i; |
| 252 | char *p, **list; |
| 253 | |
| 254 | p = user_str; |
| 255 | n = 1; |
| 256 | while (*p++) { |
| 257 | if (*p == ',') { |
| 258 | n++; |
| 259 | } |
| 260 | } |
| 261 | list = (char **) calloc((n+1)*sizeof(char *), 1); |
| 262 | |
| 263 | p = strtok(user_str, ","); |
| 264 | i = 0; |
| 265 | while (p) { |
| 266 | list[i++] = strdup(p); |
| 267 | p = strtok(NULL, ","); |
| 268 | } |
| 269 | list[i] = NULL; |
| 270 | return list; |
| 271 | } |
| 272 | |
| 273 | static void user2uid(char *user, uid_t *uid, gid_t *gid, char **name, char **home) { |
| 274 | int numerical = 1, gotgroup = 0; |
| 275 | char *q; |
| 276 | |
| 277 | *uid = (uid_t) -1; |
| 278 | *name = NULL; |
| 279 | *home = NULL; |
| 280 | |
| 281 | q = user; |
| 282 | while (*q) { |
| 283 | if (! isdigit((unsigned char) (*q++))) { |
| 284 | numerical = 0; |
| 285 | break; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | if (user2group != NULL) { |
| 290 | static int *did = NULL; |
| 291 | int i; |
| 292 | |
| 293 | if (did == NULL) { |
| 294 | int n = 0; |
| 295 | i = 0; |
| 296 | while (user2group[i] != NULL) { |
| 297 | n++; |
| 298 | i++; |
| 299 | } |
| 300 | did = (int *) malloc((n+1) * sizeof(int)); |
| 301 | i = 0; |
| 302 | for (i=0; i<n; i++) { |
| 303 | did[i] = 0; |
| 304 | } |
| 305 | } |
| 306 | i = 0; |
| 307 | while (user2group[i] != NULL) { |
| 308 | if (strstr(user2group[i], user) == user2group[i]) { |
| 309 | char *w = user2group[i] + strlen(user); |
| 310 | if (*w == '.') { |
| 311 | #if (SMALL_FOOTPRINT > 2) |
| 312 | gotgroup = 0; |
| 313 | #else |
| 314 | struct group* gr = getgrnam(++w); |
| 315 | if (! gr) { |
| 316 | rfbLog("Invalid group: %s\n", w); |
| 317 | clean_up_exit(1); |
| 318 | } |
| 319 | *gid = gr->gr_gid; |
| 320 | if (! did[i]) { |
| 321 | rfbLog("user2uid: using group %s (%d) for %s\n", |
| 322 | w, (int) *gid, user); |
| 323 | did[i] = 1; |
| 324 | } |
| 325 | gotgroup = 1; |
| 326 | #endif |
| 327 | } |
| 328 | } |
| 329 | i++; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | if (numerical) { |
| 334 | int u = atoi(user); |
| 335 | |
| 336 | if (u < 0) { |
| 337 | return; |
| 338 | } |
| 339 | *uid = (uid_t) u; |
| 340 | } |
| 341 | |
| 342 | #if LIBVNCSERVER_HAVE_PWD_H |
| 343 | if (1) { |
| 344 | struct passwd *pw; |
| 345 | if (numerical) { |
| 346 | pw = getpwuid(*uid); |
| 347 | } else { |
| 348 | pw = getpwnam(user); |
| 349 | } |
| 350 | if (pw) { |
| 351 | *uid = pw->pw_uid; |
| 352 | if (! gotgroup) { |
| 353 | *gid = pw->pw_gid; |
| 354 | } |
| 355 | *name = pw->pw_name; /* n.b. use immediately */ |
| 356 | *home = pw->pw_dir; |
| 357 | } |
| 358 | } |
| 359 | #endif |
| 360 | } |
| 361 | |
| 362 | |
| 363 | static int lurk(char **users) { |
| 364 | uid_t uid; |
| 365 | gid_t gid; |
| 366 | int success = 0, dmin = -1, dmax = -1; |
| 367 | char *p, *logins, **u; |
| 368 | char **list; |
| 369 | int lind; |
| 370 | |
| 371 | if ((u = users) != NULL && *u != NULL && *(*u) == ':') { |
| 372 | int len; |
| 373 | char *tmp; |
| 374 | |
| 375 | /* extract min and max display numbers */ |
| 376 | tmp = *u; |
| 377 | if (strchr(tmp, '-')) { |
| 378 | if (sscanf(tmp, ":%d-%d", &dmin, &dmax) != 2) { |
| 379 | dmin = -1; |
| 380 | dmax = -1; |
| 381 | } |
| 382 | } |
| 383 | if (dmin < 0) { |
| 384 | if (sscanf(tmp, ":%d", &dmin) != 1) { |
| 385 | dmin = -1; |
| 386 | dmax = -1; |
| 387 | } else { |
| 388 | dmax = dmin; |
| 389 | } |
| 390 | } |
| 391 | if ((dmin < 0 || dmax < 0) || dmin > dmax || dmax > 10000) { |
| 392 | dmin = -1; |
| 393 | dmax = -1; |
| 394 | } |
| 395 | |
| 396 | /* get user logins regardless of having a display: */ |
| 397 | logins = get_login_list(0); |
| 398 | |
| 399 | /* |
| 400 | * now we append the list in users (might as well try |
| 401 | * them) this will probably allow weird ways of starting |
| 402 | * xservers to work. |
| 403 | */ |
| 404 | len = strlen(logins); |
| 405 | u++; |
| 406 | while (*u != NULL) { |
| 407 | len += strlen(*u) + strlen(":DPY,"); |
| 408 | u++; |
| 409 | } |
| 410 | tmp = (char *) malloc(len+1); |
| 411 | strcpy(tmp, logins); |
| 412 | |
| 413 | /* now concatenate them: */ |
| 414 | u = users+1; |
| 415 | while (*u != NULL) { |
| 416 | char *q, chk[100]; |
| 417 | snprintf(chk, 100, "%s:DPY", *u); |
| 418 | q = strstr(tmp, chk); |
| 419 | if (q) { |
| 420 | char *p = q + strlen(chk); |
| 421 | |
| 422 | if (q == tmp || *(q-1) == ',') { |
| 423 | /* bounded on left. */ |
| 424 | if (*p == ',' || *p == '\0') { |
| 425 | /* bounded on right. */ |
| 426 | u++; |
| 427 | continue; |
| 428 | } |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | if (*tmp) { |
| 433 | strcat(tmp, ","); |
| 434 | } |
| 435 | strcat(tmp, *u); |
| 436 | strcat(tmp, ":DPY"); |
| 437 | u++; |
| 438 | } |
| 439 | free(logins); |
| 440 | logins = tmp; |
| 441 | |
| 442 | } else { |
| 443 | logins = get_login_list(1); |
| 444 | } |
| 445 | |
| 446 | list = (char **) calloc((strlen(logins)+2)*sizeof(char *), 1); |
| 447 | lind = 0; |
| 448 | p = strtok(logins, ","); |
| 449 | while (p) { |
| 450 | list[lind++] = strdup(p); |
| 451 | p = strtok(NULL, ","); |
| 452 | } |
| 453 | free(logins); |
| 454 | |
| 455 | lind = 0; |
| 456 | while (list[lind] != NULL) { |
| 457 | char *user, *name, *home, dpystr[10]; |
| 458 | char *q, *t; |
| 459 | int ok = 1, dn; |
| 460 | |
| 461 | p = list[lind++]; |
| 462 | |
| 463 | t = strdup(p); /* bob:0 */ |
| 464 | q = strchr(t, ':'); |
| 465 | if (! q) { |
| 466 | free(t); |
| 467 | break; |
| 468 | } |
| 469 | *q = '\0'; |
| 470 | user = t; |
| 471 | snprintf(dpystr, 10, ":%s", q+1); |
| 472 | |
| 473 | if (users) { |
| 474 | u = users; |
| 475 | ok = 0; |
| 476 | while (*u != NULL) { |
| 477 | if (*(*u) == ':') { |
| 478 | u++; |
| 479 | continue; |
| 480 | } |
| 481 | if (!strcmp(user, *u++)) { |
| 482 | ok = 1; |
| 483 | break; |
| 484 | } |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | user2uid(user, &uid, &gid, &name, &home); |
| 489 | free(t); |
| 490 | |
| 491 | if (! uid || ! gid) { |
| 492 | ok = 0; |
| 493 | } |
| 494 | |
| 495 | if (! ok) { |
| 496 | continue; |
| 497 | } |
| 498 | |
| 499 | for (dn = dmin; dn <= dmax; dn++) { |
| 500 | if (dn >= 0) { |
| 501 | sprintf(dpystr, ":%d", dn); |
| 502 | } |
| 503 | if (try_user_and_display(uid, gid, dpystr)) { |
| 504 | if (switch_user_env(uid, gid, name, home, 0)) { |
| 505 | rfbLog("lurk: now user: %s @ %s\n", |
| 506 | name, dpystr); |
| 507 | started_as_root = 2; |
| 508 | success = 1; |
| 509 | } |
| 510 | set_env("DISPLAY", dpystr); |
| 511 | break; |
| 512 | } |
| 513 | } |
| 514 | if (success) { |
| 515 | break; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | lind = 0; |
| 520 | while (list[lind] != NULL) { |
| 521 | free(list[lind]); |
| 522 | lind++; |
| 523 | } |
| 524 | |
| 525 | return success; |
| 526 | } |
| 527 | |
| 528 | void lurk_loop(char *str) { |
| 529 | char *tstr = NULL, **users = NULL; |
| 530 | |
| 531 | if (strstr(str, "lurk=") != str) { |
| 532 | exit(1); |
| 533 | } |
| 534 | rfbLog("lurking for logins using: '%s'\n", str); |
| 535 | if (strlen(str) > strlen("lurk=")) { |
| 536 | char *q = strchr(str, '='); |
| 537 | tstr = strdup(q+1); |
| 538 | users = user_list(tstr); |
| 539 | } |
| 540 | |
| 541 | while (1) { |
| 542 | if (lurk(users)) { |
| 543 | break; |
| 544 | } |
| 545 | sleep(3); |
| 546 | } |
| 547 | if (tstr) { |
| 548 | free(tstr); |
| 549 | } |
| 550 | if (users) { |
| 551 | free(users); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | static int guess_user_and_switch(char *str, int fb_mode) { |
| 556 | char *dstr, *d; |
| 557 | char *p, *tstr = NULL, *allowed = NULL, *logins, **users = NULL; |
| 558 | int dpy1, ret = 0; |
| 559 | char **list; |
| 560 | int lind; |
| 561 | |
| 562 | RAWFB_RET(0) |
| 563 | |
| 564 | d = DisplayString(dpy); |
| 565 | /* pick out ":N" */ |
| 566 | dstr = strchr(d, ':'); |
| 567 | if (! dstr) { |
| 568 | return 0; |
| 569 | } |
| 570 | if (sscanf(dstr, ":%d", &dpy1) != 1) { |
| 571 | return 0; |
| 572 | } |
| 573 | if (dpy1 < 0) { |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | if (strstr(str, "guess=") == str && strlen(str) > strlen("guess=")) { |
| 578 | allowed = strchr(str, '='); |
| 579 | allowed++; |
| 580 | |
| 581 | tstr = strdup(allowed); |
| 582 | users = user_list(tstr); |
| 583 | } |
| 584 | |
| 585 | /* loop over the utmpx entries looking for this display */ |
| 586 | logins = get_login_list(1); |
| 587 | |
| 588 | list = (char **) calloc((strlen(logins)+2)*sizeof(char *), 1); |
| 589 | lind = 0; |
| 590 | p = strtok(logins, ","); |
| 591 | while (p) { |
| 592 | list[lind++] = strdup(p); |
| 593 | p = strtok(NULL, ","); |
| 594 | } |
| 595 | |
| 596 | lind = 0; |
| 597 | while (list[lind] != NULL) { |
| 598 | char *user, *q, *t; |
| 599 | int dpy2, ok = 1; |
| 600 | |
| 601 | p = list[lind++]; |
| 602 | |
| 603 | t = strdup(p); |
| 604 | q = strchr(t, ':'); |
| 605 | if (! q) { |
| 606 | free(t); |
| 607 | break; |
| 608 | } |
| 609 | *q = '\0'; |
| 610 | user = t; |
| 611 | dpy2 = atoi(q+1); |
| 612 | |
| 613 | if (users) { |
| 614 | char **u = users; |
| 615 | ok = 0; |
| 616 | while (*u != NULL) { |
| 617 | if (!strcmp(user, *u++)) { |
| 618 | ok = 1; |
| 619 | break; |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | if (dpy1 != dpy2) { |
| 624 | ok = 0; |
| 625 | } |
| 626 | |
| 627 | if (! ok) { |
| 628 | free(t); |
| 629 | continue; |
| 630 | } |
| 631 | |
| 632 | if (switch_user(user, fb_mode)) { |
| 633 | rfbLog("switched to guessed user: %s\n", user); |
| 634 | free(t); |
| 635 | ret = 1; |
| 636 | break; |
| 637 | } |
| 638 | } |
| 639 | if (tstr) { |
| 640 | free(tstr); |
| 641 | } |
| 642 | if (users) { |
| 643 | free(users); |
| 644 | } |
| 645 | if (logins) { |
| 646 | free(logins); |
| 647 | } |
| 648 | return ret; |
| 649 | } |
| 650 | |
| 651 | static int try_user_and_display(uid_t uid, gid_t gid, char *dpystr) { |
| 652 | /* NO strtoks */ |
| 653 | #if LIBVNCSERVER_HAVE_FORK && LIBVNCSERVER_HAVE_SYS_WAIT_H && LIBVNCSERVER_HAVE_PWD_H |
| 654 | pid_t pid, pidw; |
| 655 | char *home, *name; |
| 656 | int st; |
| 657 | struct passwd *pw; |
| 658 | |
| 659 | pw = getpwuid(uid); |
| 660 | if (pw) { |
| 661 | name = pw->pw_name; |
| 662 | home = pw->pw_dir; |
| 663 | } else { |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * We fork here and try to open the display again as the |
| 669 | * new user. Unreadable XAUTHORITY could be a problem... |
| 670 | * This is not really needed since we have DISPLAY open but: |
| 671 | * 1) is a good indicator this user owns the session and 2) |
| 672 | * some activities do spawn new X apps, e.g. xmessage(1), etc. |
| 673 | */ |
| 674 | if ((pid = fork()) > 0) { |
| 675 | ; |
| 676 | } else if (pid == -1) { |
| 677 | fprintf(stderr, "could not fork\n"); |
| 678 | rfbLogPerror("fork"); |
| 679 | return 0; |
| 680 | } else { |
| 681 | /* child */ |
| 682 | Display *dpy2 = NULL; |
| 683 | int rc; |
| 684 | |
| 685 | signal(SIGHUP, SIG_DFL); |
| 686 | signal(SIGINT, SIG_DFL); |
| 687 | signal(SIGQUIT, SIG_DFL); |
| 688 | signal(SIGTERM, SIG_DFL); |
| 689 | |
| 690 | rc = switch_user_env(uid, gid, name, home, 0); |
| 691 | if (! rc) { |
| 692 | exit(1); |
| 693 | } |
| 694 | |
| 695 | fclose(stderr); |
| 696 | dpy2 = XOpenDisplay_wr(dpystr); |
| 697 | if (dpy2) { |
| 698 | XCloseDisplay_wr(dpy2); |
| 699 | exit(0); /* success */ |
| 700 | } else { |
| 701 | exit(2); /* fail */ |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | /* see what the child says: */ |
| 706 | pidw = waitpid(pid, &st, 0); |
| 707 | if (pidw == pid && WIFEXITED(st) && WEXITSTATUS(st) == 0) { |
| 708 | return 1; |
| 709 | } |
| 710 | #endif /* LIBVNCSERVER_HAVE_FORK ... */ |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | int switch_user(char *user, int fb_mode) { |
| 715 | /* NO strtoks */ |
| 716 | int doit = 0; |
| 717 | uid_t uid = 0; |
| 718 | gid_t gid = 0; |
| 719 | char *name, *home; |
| 720 | |
| 721 | if (*user == '+') { |
| 722 | doit = 1; |
| 723 | user++; |
| 724 | } |
| 725 | |
| 726 | ssl_helper_pid(0, -2); /* waitall */ |
| 727 | |
| 728 | if (strstr(user, "guess=") == user) { |
| 729 | return guess_user_and_switch(user, fb_mode); |
| 730 | } |
| 731 | |
| 732 | user2uid(user, &uid, &gid, &name, &home); |
| 733 | |
| 734 | if (uid == (uid_t) -1 || uid == 0) { |
| 735 | return 0; |
| 736 | } |
| 737 | if (gid == 0) { |
| 738 | return 0; |
| 739 | } |
| 740 | |
| 741 | if (! doit && dpy) { |
| 742 | /* see if this display works: */ |
| 743 | char *dstr = DisplayString(dpy); |
| 744 | doit = try_user_and_display(uid, gid, dstr); |
| 745 | } |
| 746 | |
| 747 | if (doit) { |
| 748 | int rc = switch_user_env(uid, gid, name, home, fb_mode); |
| 749 | if (rc) { |
| 750 | started_as_root = 2; |
| 751 | } |
| 752 | return rc; |
| 753 | } else { |
| 754 | return 0; |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | static int switch_user_env(uid_t uid, gid_t gid, char *name, char *home, int fb_mode) { |
| 759 | /* NO strtoks */ |
| 760 | char *xauth; |
| 761 | int reset_fb = 0; |
| 762 | int grp_ok = 0; |
| 763 | |
| 764 | #if !LIBVNCSERVER_HAVE_SETUID |
| 765 | return 0; |
| 766 | #else |
| 767 | /* |
| 768 | * OK, tricky here, we need to free the shm... otherwise |
| 769 | * we won't be able to delete it as the other user... |
| 770 | */ |
| 771 | if (fb_mode == 1 && (using_shm && ! xform24to32)) { |
| 772 | reset_fb = 1; |
| 773 | clean_shm(0); |
| 774 | free_tiles(); |
| 775 | } |
| 776 | #if LIBVNCSERVER_HAVE_INITGROUPS |
| 777 | #if LIBVNCSERVER_HAVE_PWD_H |
| 778 | if (getpwuid(uid) != NULL && getenv("X11VNC_SINGLE_GROUP") == NULL) { |
| 779 | struct passwd *p = getpwuid(uid); |
| 780 | /* another possibility is p->pw_gid instead of gid */ |
| 781 | if (setgid(gid) == 0 && initgroups(p->pw_name, gid) == 0) { |
| 782 | grp_ok = 1; |
| 783 | } else { |
| 784 | rfbLogPerror("initgroups"); |
| 785 | } |
| 786 | endgrent(); |
| 787 | } |
| 788 | #endif |
| 789 | #endif |
| 790 | if (! grp_ok) { |
| 791 | if (setgid(gid) == 0) { |
| 792 | grp_ok = 1; |
| 793 | } |
| 794 | } |
| 795 | if (! grp_ok) { |
| 796 | if (reset_fb) { |
| 797 | /* 2 means we did clean_shm and free_tiles */ |
| 798 | do_new_fb(2); |
| 799 | } |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | if (setuid(uid) != 0) { |
| 804 | if (reset_fb) { |
| 805 | /* 2 means we did clean_shm and free_tiles */ |
| 806 | do_new_fb(2); |
| 807 | } |
| 808 | return 0; |
| 809 | } |
| 810 | #endif |
| 811 | if (reset_fb) { |
| 812 | do_new_fb(2); |
| 813 | } |
| 814 | |
| 815 | xauth = getenv("XAUTHORITY"); |
| 816 | if (xauth && access(xauth, R_OK) != 0) { |
| 817 | *(xauth-2) = '_'; /* yow */ |
| 818 | } |
| 819 | |
| 820 | set_env("USER", name); |
| 821 | set_env("LOGNAME", name); |
| 822 | set_env("HOME", home); |
| 823 | return 1; |
| 824 | } |
| 825 | |
| 826 | static void try_to_switch_users(void) { |
| 827 | static time_t last_try = 0; |
| 828 | time_t now = time(NULL); |
| 829 | char *users, *p; |
| 830 | |
| 831 | if (getuid() && geteuid()) { |
| 832 | rfbLog("try_to_switch_users: not root\n"); |
| 833 | started_as_root = 2; |
| 834 | return; |
| 835 | } |
| 836 | if (!last_try) { |
| 837 | last_try = now; |
| 838 | } else if (now <= last_try + 2) { |
| 839 | /* try every 3 secs or so */ |
| 840 | return; |
| 841 | } |
| 842 | last_try = now; |
| 843 | |
| 844 | users = strdup(users_list); |
| 845 | |
| 846 | if (strstr(users, "guess=") == users) { |
| 847 | if (switch_user(users, 1)) { |
| 848 | started_as_root = 2; |
| 849 | } |
| 850 | free(users); |
| 851 | return; |
| 852 | } |
| 853 | |
| 854 | p = strtok(users, ","); |
| 855 | while (p) { |
| 856 | if (switch_user(p, 1)) { |
| 857 | started_as_root = 2; |
| 858 | rfbLog("try_to_switch_users: now %s\n", p); |
| 859 | break; |
| 860 | } |
| 861 | p = strtok(NULL, ","); |
| 862 | } |
| 863 | free(users); |
| 864 | } |
| 865 | |
| 866 | int read_passwds(char *passfile) { |
| 867 | char line[1024]; |
| 868 | char *filename; |
| 869 | char **old_passwd_list = passwd_list; |
| 870 | int linecount = 0, i, remove = 0, read_mode = 0, begin_vo = -1; |
| 871 | struct stat sbuf; |
| 872 | static int max = -1; |
| 873 | FILE *in = NULL; |
| 874 | static time_t last_read = 0; |
| 875 | static int read_cnt = 0; |
| 876 | int db_passwd = 0; |
| 877 | |
| 878 | if (max < 0) { |
| 879 | max = 1000; |
| 880 | if (getenv("X11VNC_MAX_PASSWDS")) { |
| 881 | max = atoi(getenv("X11VNC_MAX_PASSWDS")); |
| 882 | } |
| 883 | } |
| 884 | |
| 885 | filename = passfile; |
| 886 | if (strstr(filename, "rm:") == filename) { |
| 887 | filename += strlen("rm:"); |
| 888 | remove = 1; |
| 889 | } else if (strstr(filename, "read:") == filename) { |
| 890 | filename += strlen("read:"); |
| 891 | read_mode = 1; |
| 892 | if (stat(filename, &sbuf) == 0) { |
| 893 | if (sbuf.st_mtime <= last_read) { |
| 894 | return 1; |
| 895 | } |
| 896 | last_read = sbuf.st_mtime; |
| 897 | } |
| 898 | } else if (strstr(filename, "cmd:") == filename) { |
| 899 | int rc; |
| 900 | |
| 901 | filename += strlen("cmd:"); |
| 902 | read_mode = 1; |
| 903 | in = tmpfile(); |
| 904 | if (in == NULL) { |
| 905 | rfbLog("run_user_command tmpfile() failed: %s\n", |
| 906 | filename); |
| 907 | clean_up_exit(1); |
| 908 | } |
| 909 | rc = run_user_command(filename, latest_client, "read_passwds", |
| 910 | NULL, 0, in); |
| 911 | if (rc != 0) { |
| 912 | rfbLog("run_user_command command failed: %s\n", |
| 913 | filename); |
| 914 | clean_up_exit(1); |
| 915 | } |
| 916 | rewind(in); |
| 917 | } else if (strstr(filename, "custom:") == filename) { |
| 918 | return 1; |
| 919 | } |
| 920 | |
| 921 | if (in == NULL && stat(filename, &sbuf) == 0) { |
| 922 | /* (poor...) upper bound to number of lines */ |
| 923 | max = (int) sbuf.st_size; |
| 924 | last_read = sbuf.st_mtime; |
| 925 | } |
| 926 | |
| 927 | /* create 1 more than max to have it be the ending NULL */ |
| 928 | passwd_list = (char **) malloc( (max+1) * (sizeof(char *)) ); |
| 929 | for (i=0; i<max+1; i++) { |
| 930 | passwd_list[i] = NULL; |
| 931 | } |
| 932 | |
| 933 | if (in == NULL) { |
| 934 | in = fopen(filename, "r"); |
| 935 | } |
| 936 | if (in == NULL) { |
| 937 | rfbLog("cannot open passwdfile: %s\n", passfile); |
| 938 | rfbLogPerror("fopen"); |
| 939 | if (remove) { |
| 940 | unlink(filename); |
| 941 | } |
| 942 | clean_up_exit(1); |
| 943 | } |
| 944 | |
| 945 | if (getenv("DEBUG_PASSWDFILE") != NULL) { |
| 946 | db_passwd = 1; |
| 947 | } |
| 948 | |
| 949 | while (fgets(line, 1024, in) != NULL) { |
| 950 | char *p; |
| 951 | int blank = 1; |
| 952 | int len = strlen(line); |
| 953 | |
| 954 | if (db_passwd) { |
| 955 | fprintf(stderr, "read_passwds: raw line: %s\n", line); |
| 956 | } |
| 957 | |
| 958 | if (len == 0) { |
| 959 | continue; |
| 960 | } else if (line[len-1] == '\n') { |
| 961 | line[len-1] = '\0'; |
| 962 | } |
| 963 | if (line[0] == '\0') { |
| 964 | continue; |
| 965 | } |
| 966 | if (strstr(line, "__SKIP__") != NULL) { |
| 967 | continue; |
| 968 | } |
| 969 | if (strstr(line, "__COMM__") == line) { |
| 970 | continue; |
| 971 | } |
| 972 | if (!strcmp(line, "__BEGIN_VIEWONLY__")) { |
| 973 | if (begin_vo < 0) { |
| 974 | begin_vo = linecount; |
| 975 | } |
| 976 | continue; |
| 977 | } |
| 978 | if (line[0] == '#') { |
| 979 | /* commented out, cannot have password beginning with # */ |
| 980 | continue; |
| 981 | } |
| 982 | p = line; |
| 983 | while (*p != '\0') { |
| 984 | if (! isspace((unsigned char) (*p))) { |
| 985 | blank = 0; |
| 986 | break; |
| 987 | } |
| 988 | p++; |
| 989 | } |
| 990 | if (blank) { |
| 991 | continue; |
| 992 | } |
| 993 | |
| 994 | passwd_list[linecount++] = strdup(line); |
| 995 | if (db_passwd) { |
| 996 | fprintf(stderr, "read_passwds: keepline: %s\n", line); |
| 997 | fprintf(stderr, "read_passwds: begin_vo: %d\n", begin_vo); |
| 998 | } |
| 999 | |
| 1000 | if (linecount >= max) { |
| 1001 | rfbLog("read_passwds: hit max passwd: %d\n", max); |
| 1002 | break; |
| 1003 | } |
| 1004 | } |
| 1005 | fclose(in); |
| 1006 | |
| 1007 | for (i=0; i<1024; i++) { |
| 1008 | line[i] = '\0'; |
| 1009 | } |
| 1010 | |
| 1011 | if (remove) { |
| 1012 | unlink(filename); |
| 1013 | } |
| 1014 | |
| 1015 | if (! linecount) { |
| 1016 | rfbLog("cannot read a valid line from passwdfile: %s\n", |
| 1017 | passfile); |
| 1018 | if (read_cnt == 0) { |
| 1019 | clean_up_exit(1); |
| 1020 | } else { |
| 1021 | return 0; |
| 1022 | } |
| 1023 | } |
| 1024 | read_cnt++; |
| 1025 | |
| 1026 | for (i=0; i<linecount; i++) { |
| 1027 | char *q, *p = passwd_list[i]; |
| 1028 | if (!strcmp(p, "__EMPTY__")) { |
| 1029 | *p = '\0'; |
| 1030 | } else if ((q = strstr(p, "__COMM__")) != NULL) { |
| 1031 | *q = '\0'; |
| 1032 | } |
| 1033 | passwd_list[i] = strdup(p); |
| 1034 | if (db_passwd) { |
| 1035 | fprintf(stderr, "read_passwds: trimline: %s\n", p); |
| 1036 | } |
| 1037 | strzero(p); |
| 1038 | } |
| 1039 | |
| 1040 | begin_viewonly = begin_vo; |
| 1041 | if (read_mode && read_cnt > 1) { |
| 1042 | if (viewonly_passwd) { |
| 1043 | free(viewonly_passwd); |
| 1044 | viewonly_passwd = NULL; |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | if (begin_viewonly < 0 && linecount == 2) { |
| 1049 | /* for compatibility with previous 2-line usage: */ |
| 1050 | viewonly_passwd = strdup(passwd_list[1]); |
| 1051 | if (db_passwd) { |
| 1052 | fprintf(stderr, "read_passwds: linecount is 2.\n"); |
| 1053 | } |
| 1054 | if (screen) { |
| 1055 | char **apd = (char **) screen->authPasswdData; |
| 1056 | if (apd) { |
| 1057 | if (apd[0] != NULL) { |
| 1058 | strzero(apd[0]); |
| 1059 | } |
| 1060 | apd[0] = strdup(passwd_list[0]); |
| 1061 | } |
| 1062 | } |
| 1063 | begin_viewonly = 1; |
| 1064 | } |
| 1065 | |
| 1066 | if (old_passwd_list != NULL) { |
| 1067 | char *p; |
| 1068 | i = 0; |
| 1069 | while (old_passwd_list[i] != NULL) { |
| 1070 | p = old_passwd_list[i]; |
| 1071 | strzero(p); |
| 1072 | free(old_passwd_list[i]); |
| 1073 | i++; |
| 1074 | } |
| 1075 | free(old_passwd_list); |
| 1076 | } |
| 1077 | return 1; |
| 1078 | } |
| 1079 | |
| 1080 | void install_passwds(void) { |
| 1081 | if (viewonly_passwd) { |
| 1082 | /* append the view only passwd after the normal passwd */ |
| 1083 | char **passwds_new = (char **) malloc(3*sizeof(char *)); |
| 1084 | char **passwds_old = (char **) screen->authPasswdData; |
| 1085 | passwds_new[0] = passwds_old[0]; |
| 1086 | passwds_new[1] = viewonly_passwd; |
| 1087 | passwds_new[2] = NULL; |
| 1088 | /* mutex */ |
| 1089 | screen->authPasswdData = (void*) passwds_new; |
| 1090 | } else if (passwd_list) { |
| 1091 | int i = 0; |
| 1092 | while(passwd_list[i] != NULL) { |
| 1093 | i++; |
| 1094 | } |
| 1095 | if (begin_viewonly < 0) { |
| 1096 | begin_viewonly = i+1; |
| 1097 | } |
| 1098 | /* mutex */ |
| 1099 | screen->authPasswdData = (void*) passwd_list; |
| 1100 | screen->authPasswdFirstViewOnly = begin_viewonly; |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | void check_new_passwds(int force) { |
| 1105 | static time_t last_check = 0; |
| 1106 | time_t now; |
| 1107 | |
| 1108 | if (! passwdfile) { |
| 1109 | return; |
| 1110 | } |
| 1111 | if (strstr(passwdfile, "read:") != passwdfile) { |
| 1112 | return; |
| 1113 | } |
| 1114 | if (unixpw_in_progress) return; |
| 1115 | |
| 1116 | if (force) { |
| 1117 | last_check = 0; |
| 1118 | } |
| 1119 | |
| 1120 | now = time(NULL); |
| 1121 | if (now > last_check + 1) { |
| 1122 | if (read_passwds(passwdfile)) { |
| 1123 | install_passwds(); |
| 1124 | } |
| 1125 | last_check = now; |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | rfbBool custom_passwd_check(rfbClientPtr cl, const char *response, int len) { |
| 1130 | char *input, *cmd; |
| 1131 | char num[16]; |
| 1132 | int j, i, n, rc; |
| 1133 | |
| 1134 | rfbLog("custom_passwd_check: len=%d\n", len); |
| 1135 | |
| 1136 | if (!passwdfile || strstr(passwdfile, "custom:") != passwdfile) { |
| 1137 | return FALSE; |
| 1138 | } |
| 1139 | cmd = passwdfile + strlen("custom:"); |
| 1140 | |
| 1141 | sprintf(num, "%d\n", len); |
| 1142 | |
| 1143 | input = (char *) malloc(2 * len + 16 + 1); |
| 1144 | |
| 1145 | input[0] = '\0'; |
| 1146 | strcat(input, num); |
| 1147 | n = strlen(num); |
| 1148 | |
| 1149 | j = n; |
| 1150 | for (i=0; i < len; i++) { |
| 1151 | input[j] = cl->authChallenge[i]; |
| 1152 | j++; |
| 1153 | } |
| 1154 | for (i=0; i < len; i++) { |
| 1155 | input[j] = response[i]; |
| 1156 | j++; |
| 1157 | } |
| 1158 | rc = run_user_command(cmd, cl, "custom_passwd", input, n+2*len, NULL); |
| 1159 | free(input); |
| 1160 | if (rc == 0) { |
| 1161 | return TRUE; |
| 1162 | } else { |
| 1163 | return FALSE; |
| 1164 | } |
| 1165 | } |
| 1166 | |
| 1167 | static void handle_one_http_request(void) { |
| 1168 | rfbLog("handle_one_http_request: begin.\n"); |
| 1169 | if (inetd || screen->httpPort == 0) { |
| 1170 | int port = find_free_port(5800, 5860); |
| 1171 | if (port) { |
| 1172 | /* mutex */ |
| 1173 | screen->httpPort = port; |
| 1174 | } else { |
| 1175 | rfbLog("handle_one_http_request: no http port.\n"); |
| 1176 | clean_up_exit(1); |
| 1177 | } |
| 1178 | } |
| 1179 | screen->autoPort = FALSE; |
| 1180 | screen->port = 0; |
| 1181 | |
| 1182 | http_connections(1); |
| 1183 | |
| 1184 | rfbInitServer(screen); |
| 1185 | |
| 1186 | if (!inetd) { |
| 1187 | /* XXX ipv6 */ |
| 1188 | int conn = 0; |
| 1189 | while (1) { |
| 1190 | if (0) fprintf(stderr, "%d %d %d %d\n", conn, screen->listenSock, screen->httpSock, screen->httpListenSock); |
| 1191 | usleep(10 * 1000); |
| 1192 | rfbHttpCheckFds(screen); |
| 1193 | if (conn) { |
| 1194 | if (screen->httpSock < 0) { |
| 1195 | break; |
| 1196 | } |
| 1197 | } else { |
| 1198 | if (screen->httpSock >= 0) { |
| 1199 | conn = 1; |
| 1200 | } |
| 1201 | } |
| 1202 | if (!screen->httpDir) { |
| 1203 | break; |
| 1204 | } |
| 1205 | if (screen->httpListenSock < 0) { |
| 1206 | break; |
| 1207 | } |
| 1208 | } |
| 1209 | rfbLog("handle_one_http_request: finished.\n"); |
| 1210 | return; |
| 1211 | } else { |
| 1212 | /* inetd case: */ |
| 1213 | #if LIBVNCSERVER_HAVE_FORK |
| 1214 | pid_t pid; |
| 1215 | int s_in = screen->inetdSock; |
| 1216 | if (s_in < 0) { |
| 1217 | rfbLog("handle_one_http_request: inetdSock not set up.\n"); |
| 1218 | clean_up_exit(1); |
| 1219 | } |
| 1220 | pid = fork(); |
| 1221 | if (pid < 0) { |
| 1222 | rfbLog("handle_one_http_request: could not fork.\n"); |
| 1223 | clean_up_exit(1); |
| 1224 | } else if (pid > 0) { |
| 1225 | int status; |
| 1226 | pid_t pidw; |
| 1227 | while (1) { |
| 1228 | rfbHttpCheckFds(screen); |
| 1229 | pidw = waitpid(pid, &status, WNOHANG); |
| 1230 | if (pidw == pid && WIFEXITED(status)) { |
| 1231 | break; |
| 1232 | } else if (pidw < 0) { |
| 1233 | break; |
| 1234 | } |
| 1235 | } |
| 1236 | rfbLog("handle_one_http_request: finished.\n"); |
| 1237 | return; |
| 1238 | } else { |
| 1239 | int sock = connect_tcp("127.0.0.1", screen->httpPort); |
| 1240 | if (sock < 0) { |
| 1241 | exit(1); |
| 1242 | } |
| 1243 | raw_xfer(sock, s_in, s_in); |
| 1244 | exit(0); |
| 1245 | } |
| 1246 | #else |
| 1247 | rfbLog("handle_one_http_request: fork not supported.\n"); |
| 1248 | clean_up_exit(1); |
| 1249 | #endif |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | void user_supplied_opts(char *opts) { |
| 1254 | char *p, *str; |
| 1255 | char *allow[] = { |
| 1256 | "skip-display", "skip-auth", "skip-shared", |
| 1257 | "scale", "scale_cursor", "sc", "solid", "so", "id", |
| 1258 | "clear_mods", "cm", "clear_keys", "ck", "repeat", |
| 1259 | "clear_all", "ca", |
| 1260 | "speeds", "sp", "readtimeout", "rd", |
| 1261 | "rotate", "ro", |
| 1262 | "geometry", "geom", "ge", |
| 1263 | "noncache", "nc", |
| 1264 | "nodisplay", "nd", |
| 1265 | "viewonly", "vo", |
| 1266 | "tag", |
| 1267 | NULL |
| 1268 | }; |
| 1269 | |
| 1270 | if (getenv("X11VNC_NO_UNIXPW_OPTS")) { |
| 1271 | return; |
| 1272 | } |
| 1273 | |
| 1274 | str = strdup(opts); |
| 1275 | |
| 1276 | p = strtok(str, ","); |
| 1277 | while (p) { |
| 1278 | char *q; |
| 1279 | int i, n, m, ok = 0; |
| 1280 | |
| 1281 | i = 0; |
| 1282 | while (allow[i] != NULL) { |
| 1283 | if (strstr(allow[i], "skip-")) { |
| 1284 | i++; |
| 1285 | continue; |
| 1286 | } |
| 1287 | if (strstr(p, allow[i]) == p) { |
| 1288 | ok = 1; |
| 1289 | break; |
| 1290 | } |
| 1291 | i++; |
| 1292 | } |
| 1293 | |
| 1294 | if (! ok && strpbrk(p, "0123456789") == p && |
| 1295 | sscanf(p, "%d/%d", &n, &m) == 2) { |
| 1296 | if (scale_str) free(scale_str); |
| 1297 | scale_str = strdup(p); |
| 1298 | } else if (ok) { |
| 1299 | if (0 && strstr(p, "display=") == p) { |
| 1300 | if (use_dpy) free(use_dpy); |
| 1301 | use_dpy = strdup(p + strlen("display=")); |
| 1302 | } else if (0 && strstr(p, "auth=") == p) { |
| 1303 | if (auth_file) free(auth_file); |
| 1304 | auth_file = strdup(p + strlen("auth=")); |
| 1305 | } else if (0 && !strcmp(p, "shared")) { |
| 1306 | shared = 1; |
| 1307 | } else if (strstr(p, "scale=") == p) { |
| 1308 | if (scale_str) free(scale_str); |
| 1309 | scale_str = strdup(p + strlen("scale=")); |
| 1310 | } else if (strstr(p, "scale_cursor=") == p || |
| 1311 | strstr(p, "sc=") == p) { |
| 1312 | if (scale_cursor_str) free(scale_cursor_str); |
| 1313 | q = strchr(p, '=') + 1; |
| 1314 | scale_cursor_str = strdup(q); |
| 1315 | } else if (strstr(p, "rotate=") == p || |
| 1316 | strstr(p, "ro=") == p) { |
| 1317 | if (rotating_str) free(rotating_str); |
| 1318 | q = strchr(p, '=') + 1; |
| 1319 | rotating_str = strdup(q); |
| 1320 | } else if (!strcmp(p, "solid") || !strcmp(p, "so")) { |
| 1321 | use_solid_bg = 1; |
| 1322 | if (!solid_str) { |
| 1323 | solid_str = strdup(solid_default); |
| 1324 | } |
| 1325 | } else if (!strcmp(p, "viewonly") || !strcmp(p, "vo")) { |
| 1326 | view_only = 1; |
| 1327 | } else if (strstr(p, "solid=") == p || |
| 1328 | strstr(p, "so=") == p) { |
| 1329 | use_solid_bg = 1; |
| 1330 | if (solid_str) free(solid_str); |
| 1331 | q = strchr(p, '=') + 1; |
| 1332 | if (!strcmp(q, "R")) { |
| 1333 | solid_str = strdup("root:"); |
| 1334 | } else { |
| 1335 | solid_str = strdup(q); |
| 1336 | } |
| 1337 | } else if (strstr(p, "id=") == p) { |
| 1338 | unsigned long win; |
| 1339 | q = p + strlen("id="); |
| 1340 | if (strcmp(q, "pick")) { |
| 1341 | if (scan_hexdec(q, &win)) { |
| 1342 | subwin = win; |
| 1343 | } |
| 1344 | } |
| 1345 | } else if (!strcmp(p, "clear_mods") || |
| 1346 | !strcmp(p, "cm")) { |
| 1347 | clear_mods = 1; |
| 1348 | } else if (!strcmp(p, "clear_keys") || |
| 1349 | !strcmp(p, "ck")) { |
| 1350 | clear_mods = 2; |
| 1351 | } else if (!strcmp(p, "clear_all") || |
| 1352 | !strcmp(p, "ca")) { |
| 1353 | clear_mods = 3; |
| 1354 | } else if (!strcmp(p, "noncache") || |
| 1355 | !strcmp(p, "nc")) { |
| 1356 | ncache = 0; |
| 1357 | ncache0 = 0; |
| 1358 | } else if (strstr(p, "nc=") == p) { |
| 1359 | int n2 = atoi(p + strlen("nc=")); |
| 1360 | if (nabs(n2) < nabs(ncache)) { |
| 1361 | if (ncache < 0) { |
| 1362 | ncache = -nabs(n2); |
| 1363 | } else { |
| 1364 | ncache = nabs(n2); |
| 1365 | } |
| 1366 | } |
| 1367 | } else if (!strcmp(p, "repeat")) { |
| 1368 | no_autorepeat = 0; |
| 1369 | } else if (strstr(p, "speeds=") == p || |
| 1370 | strstr(p, "sp=") == p) { |
| 1371 | if (speeds_str) free(speeds_str); |
| 1372 | q = strchr(p, '=') + 1; |
| 1373 | speeds_str = strdup(q); |
| 1374 | q = speeds_str; |
| 1375 | while (*q != '\0') { |
| 1376 | if (*q == '-') { |
| 1377 | *q = ','; |
| 1378 | } |
| 1379 | q++; |
| 1380 | } |
| 1381 | } else if (strstr(p, "readtimeout=") == p || |
| 1382 | strstr(p, "rd=") == p) { |
| 1383 | q = strchr(p, '=') + 1; |
| 1384 | rfbMaxClientWait = atoi(q) * 1000; |
| 1385 | } |
| 1386 | } else { |
| 1387 | rfbLog("skipping option: %s\n", p); |
| 1388 | } |
| 1389 | p = strtok(NULL, ","); |
| 1390 | } |
| 1391 | free(str); |
| 1392 | } |
| 1393 | |
| 1394 | static void vnc_redirect_timeout (int sig) { |
| 1395 | write(2, "timeout: no clients connected.\n", 31); |
| 1396 | if (sig) {}; |
| 1397 | exit(0); |
| 1398 | } |
| 1399 | |
| 1400 | static void do_chvt(int vt) { |
| 1401 | char chvt[100]; |
| 1402 | sprintf(chvt, "chvt %d >/dev/null 2>/dev/null &", vt); |
| 1403 | rfbLog("running: %s\n", chvt); |
| 1404 | system(chvt); |
| 1405 | sleep(2); |
| 1406 | } |
| 1407 | |
| 1408 | static void setup_fake_fb(XImage* fb_image, int w, int h, int b) { |
| 1409 | if (fake_fb) { |
| 1410 | free(fake_fb); |
| 1411 | } |
| 1412 | fake_fb = (char *) calloc(w*h*b/8, 1); |
| 1413 | |
| 1414 | fb_image->data = fake_fb; |
| 1415 | fb_image->format = ZPixmap; |
| 1416 | fb_image->width = w; |
| 1417 | fb_image->height = h; |
| 1418 | fb_image->bits_per_pixel = b; |
| 1419 | fb_image->bytes_per_line = w*b/8; |
| 1420 | fb_image->bitmap_unit = -1; |
| 1421 | if (b >= 24) { |
| 1422 | fb_image->depth = 24; |
| 1423 | fb_image->red_mask = 0xff0000; |
| 1424 | fb_image->green_mask = 0x00ff00; |
| 1425 | fb_image->blue_mask = 0x0000ff; |
| 1426 | } else if (b >= 16) { |
| 1427 | fb_image->depth = 16; |
| 1428 | fb_image->red_mask = 0x003f; |
| 1429 | fb_image->green_mask = 0x07c0; |
| 1430 | fb_image->blue_mask = 0xf800; |
| 1431 | } else if (b >= 2) { |
| 1432 | fb_image->depth = 8; |
| 1433 | fb_image->red_mask = 0x07; |
| 1434 | fb_image->green_mask = 0x38; |
| 1435 | fb_image->blue_mask = 0xc0; |
| 1436 | } else { |
| 1437 | fb_image->depth = 1; |
| 1438 | fb_image->red_mask = 0x1; |
| 1439 | fb_image->green_mask = 0x1; |
| 1440 | fb_image->blue_mask = 0x1; |
| 1441 | } |
| 1442 | |
| 1443 | depth = fb_image->depth; |
| 1444 | |
| 1445 | dpy_x = wdpy_x = w; |
| 1446 | dpy_y = wdpy_y = h; |
| 1447 | off_x = 0; |
| 1448 | off_y = 0; |
| 1449 | } |
| 1450 | |
| 1451 | void do_announce_http(void); |
| 1452 | void do_mention_java_urls(void); |
| 1453 | |
| 1454 | static void setup_service(void) { |
| 1455 | if (remote_direct) { |
| 1456 | return; |
| 1457 | } |
| 1458 | if (!inetd) { |
| 1459 | do_mention_java_urls(); |
| 1460 | do_announce_http(); |
| 1461 | if (!use_openssl) { |
| 1462 | announce(screen->port, use_openssl, NULL); |
| 1463 | fprintf(stdout, "PORT=%d\n", screen->port); |
| 1464 | } else { |
| 1465 | fprintf(stdout, "PORT=%d\n", screen->port); |
| 1466 | if (stunnel_port) { |
| 1467 | fprintf(stdout, "SSLPORT=%d\n", stunnel_port); |
| 1468 | } else if (use_openssl) { |
| 1469 | fprintf(stdout, "SSLPORT=%d\n", screen->port); |
| 1470 | } |
| 1471 | } |
| 1472 | fflush(stdout); |
| 1473 | } else if (!use_openssl && avahi) { |
| 1474 | char *name = rfb_desktop_name; |
| 1475 | if (!name) { |
| 1476 | name = use_dpy; |
| 1477 | } |
| 1478 | avahi_initialise(); |
| 1479 | avahi_advertise(name, this_host(), screen->port); |
| 1480 | } |
| 1481 | } |
| 1482 | |
| 1483 | static void check_waitbg(void) { |
| 1484 | if (getenv("WAITBG")) { |
| 1485 | #if LIBVNCSERVER_HAVE_FORK && LIBVNCSERVER_HAVE_SETSID |
| 1486 | int p, n; |
| 1487 | if ((p = fork()) > 0) { |
| 1488 | exit(0); |
| 1489 | } else if (p == -1) { |
| 1490 | rfbLogEnable(1); |
| 1491 | fprintf(stderr, "could not fork\n"); |
| 1492 | perror("fork"); |
| 1493 | clean_up_exit(1); |
| 1494 | } |
| 1495 | if (setsid() == -1) { |
| 1496 | rfbLogEnable(1); |
| 1497 | fprintf(stderr, "setsid failed\n"); |
| 1498 | perror("setsid"); |
| 1499 | clean_up_exit(1); |
| 1500 | } |
| 1501 | /* adjust our stdio */ |
| 1502 | n = open("/dev/null", O_RDONLY); |
| 1503 | dup2(n, 0); |
| 1504 | dup2(n, 1); |
| 1505 | if (! logfile) { |
| 1506 | dup2(n, 2); |
| 1507 | } |
| 1508 | if (n > 2) { |
| 1509 | close(n); |
| 1510 | } |
| 1511 | #else |
| 1512 | clean_up_exit(1); |
| 1513 | #endif |
| 1514 | } |
| 1515 | } |
| 1516 | |
| 1517 | static void setup_client_connect(int *did_client_connect) { |
| 1518 | if (client_connect != NULL) { |
| 1519 | char *remainder = NULL; |
| 1520 | if (inetd) { |
| 1521 | rfbLog("wait_for_client: -connect disallowed in inetd mode: %s\n", |
| 1522 | client_connect); |
| 1523 | } else if (screen && screen->clientHead) { |
| 1524 | rfbLog("wait_for_client: -connect disallowed: client exists: %s\n", |
| 1525 | client_connect); |
| 1526 | } else if (strchr(client_connect, '=')) { |
| 1527 | rfbLog("wait_for_client: invalid -connect string: %s\n", |
| 1528 | client_connect); |
| 1529 | } else { |
| 1530 | char *q = strchr(client_connect, ','); |
| 1531 | if (q) { |
| 1532 | rfbLog("wait_for_client: only using first" |
| 1533 | " connect host in: %s\n", client_connect); |
| 1534 | remainder = strdup(q+1); |
| 1535 | *q = '\0'; |
| 1536 | } |
| 1537 | rfbLog("wait_for_client: reverse_connect(%s)\n", |
| 1538 | client_connect); |
| 1539 | reverse_connect(client_connect); |
| 1540 | *did_client_connect = 1; |
| 1541 | } |
| 1542 | free(client_connect); |
| 1543 | if (remainder != NULL) { |
| 1544 | /* reset to host2,host3,... */ |
| 1545 | client_connect = remainder; |
| 1546 | } else { |
| 1547 | client_connect = NULL; |
| 1548 | } |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | static void loop_for_connect(int did_client_connect) { |
| 1553 | int loop = 0; |
| 1554 | time_t start = time(NULL); |
| 1555 | |
| 1556 | if (first_conn_timeout < 0) { |
| 1557 | first_conn_timeout = -first_conn_timeout; |
| 1558 | } |
| 1559 | |
| 1560 | while (1) { |
| 1561 | loop++; |
| 1562 | if (first_conn_timeout && time(NULL) > start + first_conn_timeout) { |
| 1563 | rfbLog("no client connect after %d seconds.\n", first_conn_timeout); |
| 1564 | shut_down = 1; |
| 1565 | } |
| 1566 | if (shut_down) { |
| 1567 | clean_up_exit(0); |
| 1568 | } |
| 1569 | if (loop < 2) { |
| 1570 | if (did_client_connect) { |
| 1571 | goto screen_check; |
| 1572 | } |
| 1573 | if (inetd) { |
| 1574 | goto screen_check; |
| 1575 | } |
| 1576 | if (screen && screen->clientHead) { |
| 1577 | goto screen_check; |
| 1578 | } |
| 1579 | } |
| 1580 | if ((use_openssl || use_stunnel) && !inetd) { |
| 1581 | int enc_none = (enc_str && !strcmp(enc_str, "none")); |
| 1582 | if (!use_stunnel || enc_none) { |
| 1583 | check_openssl(); |
| 1584 | check_https(); |
| 1585 | } |
| 1586 | /* |
| 1587 | * This is to handle an initial verify cert from viewer, |
| 1588 | * they disconnect right after fetching the cert. |
| 1589 | */ |
| 1590 | if (use_threads) { |
| 1591 | usleep(10 * 1000); |
| 1592 | } else { |
| 1593 | rfbPE(-1); |
| 1594 | } |
| 1595 | if (screen && screen->clientHead) { |
| 1596 | int i; |
| 1597 | if (unixpw) { |
| 1598 | if (! unixpw_in_progress && !vencrypt_enable_plain_login) { |
| 1599 | rfbLog("unixpw but no unixpw_in_progress\n"); |
| 1600 | clean_up_exit(1); |
| 1601 | } |
| 1602 | if (unixpw_client && unixpw_client->onHold) { |
| 1603 | rfbLog("taking unixpw_client off hold\n"); |
| 1604 | unixpw_client->onHold = FALSE; |
| 1605 | } |
| 1606 | } |
| 1607 | for (i=0; i<10; i++) { |
| 1608 | if (shut_down) { |
| 1609 | clean_up_exit(0); |
| 1610 | } |
| 1611 | usleep(20 * 1000); |
| 1612 | if (0) rfbLog("wait_for_client: %d\n", i); |
| 1613 | |
| 1614 | if (! use_threads) { |
| 1615 | if (unixpw) { |
| 1616 | unixpw_in_rfbPE = 1; |
| 1617 | } |
| 1618 | rfbPE(-1); |
| 1619 | if (unixpw) { |
| 1620 | unixpw_in_rfbPE = 0; |
| 1621 | } |
| 1622 | } |
| 1623 | |
| 1624 | if (unixpw && !unixpw_in_progress) { |
| 1625 | /* XXX too soon. */ |
| 1626 | goto screen_check; |
| 1627 | } |
| 1628 | if (!screen->clientHead) { |
| 1629 | break; |
| 1630 | } |
| 1631 | } |
| 1632 | } |
| 1633 | } else if (use_openssl) { |
| 1634 | check_openssl(); |
| 1635 | } |
| 1636 | |
| 1637 | if (use_threads) { |
| 1638 | usleep(10 * 1000); |
| 1639 | } else { |
| 1640 | rfbPE(-1); |
| 1641 | } |
| 1642 | |
| 1643 | screen_check: |
| 1644 | if (! screen || ! screen->clientHead) { |
| 1645 | usleep(100 * 1000); |
| 1646 | continue; |
| 1647 | } |
| 1648 | |
| 1649 | rfbLog("wait_for_client: got client\n"); |
| 1650 | break; |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | static void do_unixpw_loop(void) { |
| 1655 | if (unixpw) { |
| 1656 | if (! unixpw_in_progress && !vencrypt_enable_plain_login) { |
| 1657 | rfbLog("unixpw but no unixpw_in_progress\n"); |
| 1658 | clean_up_exit(1); |
| 1659 | } |
| 1660 | if (unixpw_client && unixpw_client->onHold) { |
| 1661 | rfbLog("taking unixpw_client off hold.\n"); |
| 1662 | unixpw_client->onHold = FALSE; |
| 1663 | } |
| 1664 | while (1) { |
| 1665 | if (shut_down) { |
| 1666 | clean_up_exit(0); |
| 1667 | } |
| 1668 | if (! use_threads) { |
| 1669 | unixpw_in_rfbPE = 1; |
| 1670 | rfbPE(-1); |
| 1671 | unixpw_in_rfbPE = 0; |
| 1672 | } |
| 1673 | if (unixpw_in_progress) { |
| 1674 | static double lping = 0.0; |
| 1675 | if (lping < dnow() + 5) { |
| 1676 | mark_rect_as_modified(0, 0, 1, 1, 1); |
| 1677 | lping = dnow(); |
| 1678 | } |
| 1679 | if (time(NULL) > unixpw_last_try_time + 45) { |
| 1680 | rfbLog("unixpw_deny: timed out waiting for reply.\n"); |
| 1681 | unixpw_deny(); |
| 1682 | } |
| 1683 | usleep(20 * 1000); |
| 1684 | continue; |
| 1685 | } |
| 1686 | rfbLog("wait_for_client: unixpw finished.\n"); |
| 1687 | break; |
| 1688 | } |
| 1689 | } |
| 1690 | } |
| 1691 | |
| 1692 | static void vnc_redirect_loop(char *vnc_redirect_test, int *vnc_redirect_cnt) { |
| 1693 | if (unixpw) { |
| 1694 | rfbLog("wait_for_client: -unixpw and Xvnc.redirect not allowed\n"); |
| 1695 | clean_up_exit(1); |
| 1696 | } |
| 1697 | if (client_connect) { |
| 1698 | rfbLog("wait_for_client: -connect and Xvnc.redirect not allowed\n"); |
| 1699 | clean_up_exit(1); |
| 1700 | } |
| 1701 | if (inetd) { |
| 1702 | if (use_openssl) { |
| 1703 | accept_openssl(OPENSSL_INETD, -1); |
| 1704 | } |
| 1705 | } else { |
| 1706 | pid_t pid = 0; |
| 1707 | /* XXX ipv6 */ |
| 1708 | if (screen->httpListenSock >= 0) { |
| 1709 | #if LIBVNCSERVER_HAVE_FORK |
| 1710 | if ((pid = fork()) > 0) { |
| 1711 | close(screen->httpListenSock); |
| 1712 | /* mutex */ |
| 1713 | screen->httpListenSock = -2; |
| 1714 | usleep(500 * 1000); |
| 1715 | } else { |
| 1716 | close(screen->listenSock); |
| 1717 | screen->listenSock = -1; |
| 1718 | while (1) { |
| 1719 | usleep(10 * 1000); |
| 1720 | rfbHttpCheckFds(screen); |
| 1721 | } |
| 1722 | exit(1); |
| 1723 | } |
| 1724 | #else |
| 1725 | clean_up_exit(1); |
| 1726 | #endif |
| 1727 | } |
| 1728 | if (first_conn_timeout) { |
| 1729 | if (first_conn_timeout < 0) { |
| 1730 | first_conn_timeout = -first_conn_timeout; |
| 1731 | } |
| 1732 | signal(SIGALRM, vnc_redirect_timeout); |
| 1733 | alarm(first_conn_timeout); |
| 1734 | } |
| 1735 | if (use_openssl) { |
| 1736 | int i; |
| 1737 | if (pid == 0) { |
| 1738 | accept_openssl(OPENSSL_VNC, -1); |
| 1739 | } else { |
| 1740 | for (i=0; i < 16; i++) { |
| 1741 | accept_openssl(OPENSSL_VNC, -1); |
| 1742 | rfbLog("iter %d: vnc_redirect_sock: %d\n", i, vnc_redirect_sock); |
| 1743 | if (vnc_redirect_sock >= 0) { |
| 1744 | break; |
| 1745 | } |
| 1746 | } |
| 1747 | } |
| 1748 | } else { |
| 1749 | struct sockaddr_in addr; |
| 1750 | #ifdef __hpux |
| 1751 | int addrlen = sizeof(addr); |
| 1752 | #else |
| 1753 | socklen_t addrlen = sizeof(addr); |
| 1754 | #endif |
| 1755 | if (screen->listenSock < 0) { |
| 1756 | rfbLog("wait_for_client: Xvnc.redirect not listening... sock=%d port=%d\n", screen->listenSock, screen->port); |
| 1757 | clean_up_exit(1); |
| 1758 | } |
| 1759 | vnc_redirect_sock = accept(screen->listenSock, (struct sockaddr *)&addr, &addrlen); |
| 1760 | } |
| 1761 | if (first_conn_timeout) { |
| 1762 | alarm(0); |
| 1763 | } |
| 1764 | if (pid > 0) { |
| 1765 | #if LIBVNCSERVER_HAVE_FORK |
| 1766 | int rc; |
| 1767 | pid_t pidw; |
| 1768 | rfbLog("wait_for_client: kill TERM: %d\n", (int) pid); |
| 1769 | kill(pid, SIGTERM); |
| 1770 | usleep(1000 * 1000); /* 1.0 sec */ |
| 1771 | pidw = waitpid(pid, &rc, WNOHANG); |
| 1772 | if (pidw <= 0) { |
| 1773 | usleep(1000 * 1000); /* 1.0 sec */ |
| 1774 | pidw = waitpid(pid, &rc, WNOHANG); |
| 1775 | } |
| 1776 | #else |
| 1777 | clean_up_exit(1); |
| 1778 | #endif |
| 1779 | } |
| 1780 | } |
| 1781 | if (vnc_redirect_sock < 0) { |
| 1782 | rfbLog("wait_for_client: vnc_redirect failed.\n"); |
| 1783 | clean_up_exit(1); |
| 1784 | } |
| 1785 | if (!inetd && use_openssl) { |
| 1786 | /* check for Fetch Cert closing */ |
| 1787 | fd_set rfds; |
| 1788 | struct timeval tv; |
| 1789 | int nfds; |
| 1790 | |
| 1791 | usleep(300*1000); |
| 1792 | |
| 1793 | FD_ZERO(&rfds); |
| 1794 | FD_SET(vnc_redirect_sock, &rfds); |
| 1795 | |
| 1796 | tv.tv_sec = 0; |
| 1797 | tv.tv_usec = 200000; |
| 1798 | nfds = select(vnc_redirect_sock+1, &rfds, NULL, NULL, &tv); |
| 1799 | |
| 1800 | rfbLog("wait_for_client: vnc_redirect nfds: %d\n", nfds); |
| 1801 | if (nfds > 0) { |
| 1802 | int n; |
| 1803 | n = read(vnc_redirect_sock, vnc_redirect_test, 1); |
| 1804 | if (n <= 0) { |
| 1805 | close(vnc_redirect_sock); |
| 1806 | vnc_redirect_sock = -1; |
| 1807 | rfbLog("wait_for_client: waiting for 2nd connection (Fetch Cert?)\n"); |
| 1808 | accept_openssl(OPENSSL_VNC, -1); |
| 1809 | if (vnc_redirect_sock < 0) { |
| 1810 | rfbLog("wait_for_client: vnc_redirect failed.\n"); |
| 1811 | clean_up_exit(1); |
| 1812 | } |
| 1813 | } else { |
| 1814 | *vnc_redirect_cnt = n; |
| 1815 | } |
| 1816 | } |
| 1817 | } |
| 1818 | } |
| 1819 | |
| 1820 | static void do_vnc_redirect(int created_disp, char *vnc_redirect_host, int vnc_redirect_port, |
| 1821 | int vnc_redirect_cnt, char *vnc_redirect_test) { |
| 1822 | char *q = strrchr(use_dpy, ':'); |
| 1823 | int vdpy = -1, sock = -1; |
| 1824 | int s_in, s_out, i; |
| 1825 | if (vnc_redirect == 2) { |
| 1826 | char num[32]; |
| 1827 | sprintf(num, ":%d", vnc_redirect_port); |
| 1828 | q = num; |
| 1829 | } |
| 1830 | if (!q) { |
| 1831 | rfbLog("wait_for_client: can't find number in X display: %s\n", use_dpy); |
| 1832 | clean_up_exit(1); |
| 1833 | } |
| 1834 | if (sscanf(q+1, "%d", &vdpy) != 1) { |
| 1835 | rfbLog("wait_for_client: can't find number in X display: %s\n", q); |
| 1836 | clean_up_exit(1); |
| 1837 | } |
| 1838 | if (vdpy == -1 && vnc_redirect != 2) { |
| 1839 | rfbLog("wait_for_client: can't find number in X display: %s\n", q); |
| 1840 | clean_up_exit(1); |
| 1841 | } |
| 1842 | if (vnc_redirect == 2) { |
| 1843 | if (vdpy < 0) { |
| 1844 | vdpy = -vdpy; |
| 1845 | } else if (vdpy < 200) { |
| 1846 | vdpy += 5900; |
| 1847 | } |
| 1848 | } else { |
| 1849 | vdpy += 5900; |
| 1850 | } |
| 1851 | if (created_disp) { |
| 1852 | usleep(1000*1000); |
| 1853 | } |
| 1854 | for (i=0; i < 20; i++) { |
| 1855 | sock = connect_tcp(vnc_redirect_host, vdpy); |
| 1856 | if (sock >= 0) { |
| 1857 | break; |
| 1858 | } |
| 1859 | rfbLog("wait_for_client: ...\n"); |
| 1860 | usleep(500*1000); |
| 1861 | } |
| 1862 | if (sock < 0) { |
| 1863 | rfbLog("wait_for_client: could not connect to a VNC Server at %s:%d\n", vnc_redirect_host, vdpy); |
| 1864 | clean_up_exit(1); |
| 1865 | } |
| 1866 | if (inetd) { |
| 1867 | s_in = fileno(stdin); |
| 1868 | s_out = fileno(stdout); |
| 1869 | } else { |
| 1870 | s_in = s_out = vnc_redirect_sock; |
| 1871 | } |
| 1872 | if (vnc_redirect_cnt > 0) { |
| 1873 | write(vnc_redirect_sock, vnc_redirect_test, vnc_redirect_cnt); |
| 1874 | } |
| 1875 | rfbLog("wait_for_client: switching control to VNC Server at %s:%d\n", vnc_redirect_host, vdpy); |
| 1876 | raw_xfer(sock, s_in, s_out); |
| 1877 | } |
| 1878 | |
| 1879 | extern char find_display[]; |
| 1880 | extern char create_display[]; |
| 1881 | |
| 1882 | char *setup_cmd(char *str, int *vnc_redirect, char **vnc_redirect_host, int *vnc_redirect_port, int db) { |
| 1883 | char *cmd = NULL; |
| 1884 | |
| 1885 | if (no_external_cmds || !cmd_ok("WAIT")) { |
| 1886 | rfbLog("wait_for_client external cmds not allowed:" |
| 1887 | " %s\n", use_dpy); |
| 1888 | clean_up_exit(1); |
| 1889 | } |
| 1890 | |
| 1891 | cmd = str + strlen("cmd="); |
| 1892 | if (!strcmp(cmd, "FINDDISPLAY-print")) { |
| 1893 | fprintf(stdout, "%s", find_display); |
| 1894 | clean_up_exit(0); |
| 1895 | } |
| 1896 | if (!strcmp(cmd, "FINDDISPLAY-run")) { |
| 1897 | char tmp[] = "/tmp/fd.XXXXXX"; |
| 1898 | char com[100]; |
| 1899 | int fd = mkstemp(tmp); |
| 1900 | if (fd >= 0) { |
| 1901 | int ret; |
| 1902 | write(fd, find_display, strlen(find_display)); |
| 1903 | close(fd); |
| 1904 | set_env("FINDDISPLAY_run", "1"); |
| 1905 | sprintf(com, "/bin/sh %s -n", tmp); |
| 1906 | ret = system(com); |
| 1907 | if (WIFEXITED(ret) && WEXITSTATUS(ret) != 0) { |
| 1908 | if (got_findauth && !getenv("FD_XDM")) { |
| 1909 | if (getuid() == 0 || geteuid() == 0) { |
| 1910 | set_env("FD_XDM", "1"); |
| 1911 | system(com); |
| 1912 | } |
| 1913 | } |
| 1914 | } |
| 1915 | } |
| 1916 | unlink(tmp); |
| 1917 | exit(0); |
| 1918 | } |
| 1919 | if (!strcmp(str, "FINDCREATEDISPLAY-print")) { |
| 1920 | fprintf(stdout, "%s", create_display); |
| 1921 | clean_up_exit(0); |
| 1922 | } |
| 1923 | if (db) fprintf(stderr, "cmd: %s\n", cmd); |
| 1924 | if (strstr(str, "FINDCREATEDISPLAY") || strstr(str, "FINDDISPLAY")) { |
| 1925 | if (strstr(str, "Xvnc.redirect") || strstr(str, "X.redirect")) { |
| 1926 | *vnc_redirect = 1; |
| 1927 | } |
| 1928 | } |
| 1929 | if (strstr(cmd, "FINDDISPLAY-vnc_redirect") == cmd) { |
| 1930 | int p; |
| 1931 | char h[256]; |
| 1932 | if (strlen(cmd) >= 256) { |
| 1933 | rfbLog("wait_for_client string too long: %s\n", str); |
| 1934 | clean_up_exit(1); |
| 1935 | } |
| 1936 | h[0] = '\0'; |
| 1937 | if (sscanf(cmd, "FINDDISPLAY-vnc_redirect=%d", &p) == 1) { |
| 1938 | ; |
| 1939 | } else if (sscanf(cmd, "FINDDISPLAY-vnc_redirect=%s %d", h, &p) == 2) { |
| 1940 | ; |
| 1941 | } else { |
| 1942 | rfbLog("wait_for_client bad string: %s\n", cmd); |
| 1943 | clean_up_exit(1); |
| 1944 | } |
| 1945 | *vnc_redirect_port = p; |
| 1946 | if (strcmp(h, "")) { |
| 1947 | *vnc_redirect_host = strdup(h); |
| 1948 | } |
| 1949 | *vnc_redirect = 2; |
| 1950 | rfbLog("wait_for_client: vnc_redirect: %s:%d\n", *vnc_redirect_host, *vnc_redirect_port); |
| 1951 | } |
| 1952 | return cmd; |
| 1953 | } |
| 1954 | |
| 1955 | static char *build_create_cmd(char *cmd, int *saw_xdmcp, char *usslpeer, char *tmp) { |
| 1956 | char *create_cmd = NULL; |
| 1957 | char *opts = strchr(cmd, '-'); |
| 1958 | char st[] = ""; |
| 1959 | char fdgeom[128], fdsess[128], fdopts[128], fdextra[256], fdprog[128]; |
| 1960 | char fdxsrv[128], fdxdum[128], fdcups[128], fdesd[128]; |
| 1961 | char fdnas[128], fdsmb[128], fdtag[128], fdxdmcpif[128]; |
| 1962 | char cdout[128]; |
| 1963 | |
| 1964 | if (opts) { |
| 1965 | opts++; |
| 1966 | if (strstr(opts, "xdmcp")) { |
| 1967 | *saw_xdmcp = 1; |
| 1968 | } |
| 1969 | } else { |
| 1970 | opts = st; |
| 1971 | } |
| 1972 | sprintf(fdgeom, "NONE"); |
| 1973 | fdsess[0] = '\0'; |
| 1974 | fdgeom[0] = '\0'; |
| 1975 | fdopts[0] = '\0'; |
| 1976 | fdextra[0] = '\0'; |
| 1977 | fdprog[0] = '\0'; |
| 1978 | fdxsrv[0] = '\0'; |
| 1979 | fdxdum[0] = '\0'; |
| 1980 | fdcups[0] = '\0'; |
| 1981 | fdesd[0] = '\0'; |
| 1982 | fdnas[0] = '\0'; |
| 1983 | fdsmb[0] = '\0'; |
| 1984 | fdtag[0] = '\0'; |
| 1985 | fdxdmcpif[0] = '\0'; |
| 1986 | cdout[0] = '\0'; |
| 1987 | |
| 1988 | if (unixpw && keep_unixpw_opts && !getenv("X11VNC_NO_UNIXPW_OPTS")) { |
| 1989 | char *q, *p, *t = strdup(keep_unixpw_opts); |
| 1990 | |
| 1991 | if (strstr(t, "gnome")) { |
| 1992 | sprintf(fdsess, "gnome"); |
| 1993 | } else if (strstr(t, "kde")) { |
| 1994 | sprintf(fdsess, "kde"); |
| 1995 | } else if (strstr(t, "lxde")) { |
| 1996 | sprintf(fdsess, "lxde"); |
| 1997 | } else if (strstr(t, "twm")) { |
| 1998 | sprintf(fdsess, "twm"); |
| 1999 | } else if (strstr(t, "fvwm")) { |
| 2000 | sprintf(fdsess, "fvwm"); |
| 2001 | } else if (strstr(t, "mwm")) { |
| 2002 | sprintf(fdsess, "mwm"); |
| 2003 | } else if (strstr(t, "cde")) { |
| 2004 | sprintf(fdsess, "cde"); |
| 2005 | } else if (strstr(t, "dtwm")) { |
| 2006 | sprintf(fdsess, "dtwm"); |
| 2007 | } else if (strstr(t, "xterm")) { |
| 2008 | sprintf(fdsess, "xterm"); |
| 2009 | } else if (strstr(t, "wmaker")) { |
| 2010 | sprintf(fdsess, "wmaker"); |
| 2011 | } else if (strstr(t, "xfce")) { |
| 2012 | sprintf(fdsess, "xfce"); |
| 2013 | } else if (strstr(t, "enlightenment")) { |
| 2014 | sprintf(fdsess, "enlightenment"); |
| 2015 | } else if (strstr(t, "Xsession")) { |
| 2016 | sprintf(fdsess, "Xsession"); |
| 2017 | } else if (strstr(t, "failsafe")) { |
| 2018 | sprintf(fdsess, "failsafe"); |
| 2019 | } |
| 2020 | |
| 2021 | q = strstr(t, "ge="); |
| 2022 | if (! q) q = strstr(t, "geom="); |
| 2023 | if (! q) q = strstr(t, "geometry="); |
| 2024 | if (q) { |
| 2025 | int ok = 1; |
| 2026 | q = strstr(q, "="); |
| 2027 | q++; |
| 2028 | p = strstr(q, ","); |
| 2029 | if (p) *p = '\0'; |
| 2030 | p = q; |
| 2031 | while (*p) { |
| 2032 | if (*p == 'x') { |
| 2033 | ; |
| 2034 | } else if (isdigit((int) *p)) { |
| 2035 | ; |
| 2036 | } else { |
| 2037 | ok = 0; |
| 2038 | break; |
| 2039 | } |
| 2040 | p++; |
| 2041 | } |
| 2042 | if (ok && strlen(q) < 32) { |
| 2043 | sprintf(fdgeom, "%s", q); |
| 2044 | if (!quiet) { |
| 2045 | rfbLog("set create display geom: %s\n", fdgeom); |
| 2046 | } |
| 2047 | } |
| 2048 | } |
| 2049 | q = strstr(t, "cups="); |
| 2050 | if (q) { |
| 2051 | int p; |
| 2052 | if (sscanf(q, "cups=%d", &p) == 1) { |
| 2053 | sprintf(fdcups, "%d", p); |
| 2054 | } |
| 2055 | } |
| 2056 | q = strstr(t, "esd="); |
| 2057 | if (q) { |
| 2058 | int p; |
| 2059 | if (sscanf(q, "esd=%d", &p) == 1) { |
| 2060 | sprintf(fdesd, "%d", p); |
| 2061 | } |
| 2062 | } |
| 2063 | if (!getenv("FD_TAG")) { |
| 2064 | char *s = NULL; |
| 2065 | |
| 2066 | q = strstr(t, "tag="); |
| 2067 | if (q) s = strchr(q, ','); |
| 2068 | if (s) *s = '\0'; |
| 2069 | |
| 2070 | if (q && strlen(q) < 120) { |
| 2071 | char *p; |
| 2072 | int ok = 1; |
| 2073 | q = strchr(q, '=') + 1; |
| 2074 | p = q; |
| 2075 | while (*p != '\0') { |
| 2076 | char c = *p; |
| 2077 | if (*p == '_' || *p == '-') { |
| 2078 | ; |
| 2079 | } else if (!isalnum((int) c)) { |
| 2080 | ok = 0; |
| 2081 | rfbLog("bad tag char: '%c' in '%s'\n", c, q); |
| 2082 | break; |
| 2083 | } |
| 2084 | p++; |
| 2085 | } |
| 2086 | if (ok) { |
| 2087 | sprintf(fdtag, "%s", q); |
| 2088 | } |
| 2089 | } |
| 2090 | if (s) *s = ','; |
| 2091 | } |
| 2092 | free(t); |
| 2093 | } |
| 2094 | if (fdgeom[0] == '\0' && getenv("FD_GEOM")) { |
| 2095 | snprintf(fdgeom, 120, "%s", getenv("FD_GEOM")); |
| 2096 | } |
| 2097 | if (fdsess[0] == '\0' && getenv("FD_SESS")) { |
| 2098 | snprintf(fdsess, 120, "%s", getenv("FD_SESS")); |
| 2099 | } |
| 2100 | if (fdopts[0] == '\0' && getenv("FD_OPTS")) { |
| 2101 | snprintf(fdopts, 120, "%s", getenv("FD_OPTS")); |
| 2102 | } |
| 2103 | if (fdextra[0] == '\0' && getenv("FD_EXTRA")) { |
| 2104 | if (!strchr(getenv("FD_EXTRA"), '\'')) { |
| 2105 | snprintf(fdextra, 250, "%s", getenv("FD_EXTRA")); |
| 2106 | } |
| 2107 | } |
| 2108 | if (fdprog[0] == '\0' && getenv("FD_PROG")) { |
| 2109 | snprintf(fdprog, 120, "%s", getenv("FD_PROG")); |
| 2110 | } |
| 2111 | if (fdxsrv[0] == '\0' && getenv("FD_XSRV")) { |
| 2112 | snprintf(fdxsrv, 120, "%s", getenv("FD_XSRV")); |
| 2113 | } |
| 2114 | if (fdcups[0] == '\0' && getenv("FD_CUPS")) { |
| 2115 | snprintf(fdcups, 120, "%s", getenv("FD_CUPS")); |
| 2116 | } |
| 2117 | if (fdesd[0] == '\0' && getenv("FD_ESD")) { |
| 2118 | snprintf(fdesd, 120, "%s", getenv("FD_ESD")); |
| 2119 | } |
| 2120 | if (fdnas[0] == '\0' && getenv("FD_NAS")) { |
| 2121 | snprintf(fdnas, 120, "%s", getenv("FD_NAS")); |
| 2122 | } |
| 2123 | if (fdsmb[0] == '\0' && getenv("FD_SMB")) { |
| 2124 | snprintf(fdsmb, 120, "%s", getenv("FD_SMB")); |
| 2125 | } |
| 2126 | if (fdtag[0] == '\0' && getenv("FD_TAG")) { |
| 2127 | snprintf(fdtag, 120, "%s", getenv("FD_TAG")); |
| 2128 | } |
| 2129 | if (fdxdmcpif[0] == '\0' && getenv("FD_XDMCP_IF")) { |
| 2130 | snprintf(fdxdmcpif, 120, "%s", getenv("FD_XDMCP_IF")); |
| 2131 | } |
| 2132 | if (fdxdum[0] == '\0' && getenv("FD_XDUMMY_RUN_AS_ROOT")) { |
| 2133 | snprintf(fdxdum, 120, "%s", getenv("FD_XDUMMY_RUN_AS_ROOT")); |
| 2134 | } |
| 2135 | if (getenv("CREATE_DISPLAY_OUTPUT")) { |
| 2136 | snprintf(cdout, 120, "CREATE_DISPLAY_OUTPUT='%s'", getenv("CREATE_DISPLAY_OUTPUT")); |
| 2137 | } |
| 2138 | |
| 2139 | if (strchr(fdgeom, '\'')) fdgeom[0] = '\0'; |
| 2140 | if (strchr(fdopts, '\'')) fdopts[0] = '\0'; |
| 2141 | if (strchr(fdextra, '\'')) fdextra[0] = '\0'; |
| 2142 | if (strchr(fdprog, '\'')) fdprog[0] = '\0'; |
| 2143 | if (strchr(fdxsrv, '\'')) fdxsrv[0] = '\0'; |
| 2144 | if (strchr(fdcups, '\'')) fdcups[0] = '\0'; |
| 2145 | if (strchr(fdesd, '\'')) fdesd[0] = '\0'; |
| 2146 | if (strchr(fdnas, '\'')) fdnas[0] = '\0'; |
| 2147 | if (strchr(fdsmb, '\'')) fdsmb[0] = '\0'; |
| 2148 | if (strchr(fdtag, '\'')) fdtag[0] = '\0'; |
| 2149 | if (strchr(fdxdmcpif, '\'')) fdxdmcpif[0] = '\0'; |
| 2150 | if (strchr(fdxdum, '\'')) fdxdum[0] = '\0'; |
| 2151 | if (strchr(fdsess, '\'')) fdsess[0] = '\0'; |
| 2152 | if (strchr(cdout, '\'')) cdout[0] = '\0'; |
| 2153 | |
| 2154 | set_env("FD_GEOM", fdgeom); |
| 2155 | set_env("FD_OPTS", fdopts); |
| 2156 | set_env("FD_EXTRA", fdextra); |
| 2157 | set_env("FD_PROG", fdprog); |
| 2158 | set_env("FD_XSRV", fdxsrv); |
| 2159 | set_env("FD_CUPS", fdcups); |
| 2160 | set_env("FD_ESD", fdesd); |
| 2161 | set_env("FD_NAS", fdnas); |
| 2162 | set_env("FD_SMB", fdsmb); |
| 2163 | set_env("FD_TAG", fdtag); |
| 2164 | set_env("FD_XDMCP_IF", fdxdmcpif); |
| 2165 | set_env("FD_XDUMMY_RUN_AS_ROOT", fdxdum); |
| 2166 | set_env("FD_SESS", fdsess); |
| 2167 | |
| 2168 | if (usslpeer || (unixpw && keep_unixpw_user)) { |
| 2169 | char *uu = usslpeer; |
| 2170 | if (!uu) { |
| 2171 | uu = keep_unixpw_user; |
| 2172 | } |
| 2173 | if (strchr(uu, '\'')) { |
| 2174 | uu = ""; |
| 2175 | } |
| 2176 | create_cmd = (char *) malloc(strlen(tmp)+1 |
| 2177 | + strlen("env USER='' ") |
| 2178 | + strlen("FD_GEOM='' ") |
| 2179 | + strlen("FD_OPTS='' ") |
| 2180 | + strlen("FD_EXTRA='' ") |
| 2181 | + strlen("FD_PROG='' ") |
| 2182 | + strlen("FD_XSRV='' ") |
| 2183 | + strlen("FD_CUPS='' ") |
| 2184 | + strlen("FD_ESD='' ") |
| 2185 | + strlen("FD_NAS='' ") |
| 2186 | + strlen("FD_SMB='' ") |
| 2187 | + strlen("FD_TAG='' ") |
| 2188 | + strlen("FD_XDMCP_IF='' ") |
| 2189 | + strlen("FD_XDUMMY_RUN_AS_ROOT='' ") |
| 2190 | + strlen("FD_SESS='' /bin/sh ") |
| 2191 | + strlen(uu) + 1 |
| 2192 | + strlen(fdgeom) + 1 |
| 2193 | + strlen(fdopts) + 1 |
| 2194 | + strlen(fdextra) + 1 |
| 2195 | + strlen(fdprog) + 1 |
| 2196 | + strlen(fdxsrv) + 1 |
| 2197 | + strlen(fdcups) + 1 |
| 2198 | + strlen(fdesd) + 1 |
| 2199 | + strlen(fdnas) + 1 |
| 2200 | + strlen(fdsmb) + 1 |
| 2201 | + strlen(fdtag) + 1 |
| 2202 | + strlen(fdxdmcpif) + 1 |
| 2203 | + strlen(fdxdum) + 1 |
| 2204 | + strlen(fdsess) + 1 |
| 2205 | + strlen(cdout) + 1 |
| 2206 | + strlen(opts) + 1); |
| 2207 | sprintf(create_cmd, "env USER='%s' FD_GEOM='%s' FD_SESS='%s' " |
| 2208 | "FD_OPTS='%s' FD_EXTRA='%s' FD_PROG='%s' FD_XSRV='%s' FD_CUPS='%s' " |
| 2209 | "FD_ESD='%s' FD_NAS='%s' FD_SMB='%s' FD_TAG='%s' FD_XDMCP_IF='%s' " |
| 2210 | "FD_XDUMMY_RUN_AS_ROOT='%s' %s /bin/sh %s %s", |
| 2211 | uu, fdgeom, fdsess, fdopts, fdextra, fdprog, fdxsrv, |
| 2212 | fdcups, fdesd, fdnas, fdsmb, fdtag, fdxdmcpif, fdxdum, cdout, tmp, opts); |
| 2213 | } else { |
| 2214 | create_cmd = (char *) malloc(strlen(tmp) |
| 2215 | + strlen("/bin/sh ") + 1 + strlen(opts) + 1); |
| 2216 | sprintf(create_cmd, "/bin/sh %s %s", tmp, opts); |
| 2217 | } |
| 2218 | return create_cmd; |
| 2219 | } |
| 2220 | |
| 2221 | static char *certret_extract() { |
| 2222 | char *q, *p, *str = strdup(certret_str); |
| 2223 | char *upeer = NULL; |
| 2224 | int ok = 0; |
| 2225 | |
| 2226 | q = strstr(str, "Subject: "); |
| 2227 | if (! q) return NULL; |
| 2228 | |
| 2229 | p = strstr(q, "\n"); |
| 2230 | if (p) *p = '\0'; |
| 2231 | |
| 2232 | q = strstr(q, "CN="); |
| 2233 | if (! q) return NULL; |
| 2234 | |
| 2235 | if (! getenv("X11VNC_SSLPEER_CN")) { |
| 2236 | p = q; |
| 2237 | q = strstr(q, "/emailAddress="); |
| 2238 | if (! q) q = strstr(p, "/Email="); |
| 2239 | if (! q) return NULL; |
| 2240 | } |
| 2241 | |
| 2242 | q = strstr(q, "="); |
| 2243 | if (! q) return NULL; |
| 2244 | |
| 2245 | q++; |
| 2246 | p = strstr(q, " "); |
| 2247 | if (p) *p = '\0'; |
| 2248 | p = strstr(q, "@"); |
| 2249 | if (p) *p = '\0'; |
| 2250 | p = strstr(q, "/"); |
| 2251 | if (p) *p = '\0'; |
| 2252 | |
| 2253 | upeer = strdup(q); |
| 2254 | |
| 2255 | if (strcmp(upeer, "")) { |
| 2256 | p = upeer; |
| 2257 | while (*p != '\0') { |
| 2258 | char c = *p; |
| 2259 | if (!isalnum((int) c)) { |
| 2260 | *p = '\0'; |
| 2261 | break; |
| 2262 | } |
| 2263 | p++; |
| 2264 | } |
| 2265 | if (strcmp(upeer, "")) { |
| 2266 | ok = 1; |
| 2267 | } |
| 2268 | } |
| 2269 | if (! ok) { |
| 2270 | upeer = NULL; |
| 2271 | } |
| 2272 | return upeer; |
| 2273 | } |
| 2274 | |
| 2275 | static void check_nodisplay(char **nd, char **tag) { |
| 2276 | if (unixpw && !getenv("X11VNC_NO_UNIXPW_OPTS") && keep_unixpw_opts && keep_unixpw_opts[0] != '\0') { |
| 2277 | char *q, *t2, *t = keep_unixpw_opts; |
| 2278 | q = strstr(t, "nd="); |
| 2279 | if (! q) q = strstr(t, "nodisplay="); |
| 2280 | if (q) { |
| 2281 | q = strchr(q, '=') + 1; |
| 2282 | t = strdup(q); |
| 2283 | q = t; |
| 2284 | t2 = strchr(t, ','); |
| 2285 | if (t2) *t2 = '\0'; |
| 2286 | |
| 2287 | while (*t != '\0') { |
| 2288 | if (*t == '+') { |
| 2289 | *t = ','; |
| 2290 | } |
| 2291 | t++; |
| 2292 | } |
| 2293 | if (!strchr(q, '\'') && !strpbrk(q, "[](){}`'\"$&*|<>")) { |
| 2294 | if (! quiet) rfbLog("set X11VNC_SKIP_DISPLAY: %s\n", q); |
| 2295 | *nd = q; |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | q = strstr(keep_unixpw_opts, "tag="); |
| 2300 | if (getenv("FD_TAG")) { |
| 2301 | *tag = strdup(getenv("FD_TAG")); |
| 2302 | } else if (q) { |
| 2303 | q = strchr(q, '=') + 1; |
| 2304 | t = strdup(q); |
| 2305 | q = t; |
| 2306 | t2 = strchr(t, ','); |
| 2307 | if (t2) *t2 = '\0'; |
| 2308 | |
| 2309 | if (strlen(q) < 120) { |
| 2310 | int ok = 1; |
| 2311 | while (*t != '\0') { |
| 2312 | char c = *t; |
| 2313 | if (*t == '_' || *t == '-') { |
| 2314 | ; |
| 2315 | } else if (!isalnum((int) c)) { |
| 2316 | ok = 0; |
| 2317 | rfbLog("bad tag char: '%c' in '%s'\n", c, q); |
| 2318 | break; |
| 2319 | } |
| 2320 | t++; |
| 2321 | } |
| 2322 | if (ok) { |
| 2323 | if (! quiet) rfbLog("set FD_TAG: %s\n", q); |
| 2324 | *tag = q; |
| 2325 | } |
| 2326 | } |
| 2327 | } |
| 2328 | } |
| 2329 | if (unixpw_system_greeter_active == 2) { |
| 2330 | if (!keep_unixpw_user) { |
| 2331 | clean_up_exit(1); |
| 2332 | } |
| 2333 | *nd = strdup("all"); |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | static char *get_usslpeer() { |
| 2338 | char *u = NULL, *upeer = NULL; |
| 2339 | |
| 2340 | if (certret_str) { |
| 2341 | upeer = certret_extract(); |
| 2342 | } |
| 2343 | if (!upeer) { |
| 2344 | return NULL; |
| 2345 | } |
| 2346 | rfbLog("sslpeer unix username extracted from x509 cert: %s\n", upeer); |
| 2347 | |
| 2348 | u = (char *) malloc(strlen(upeer+2)); |
| 2349 | u[0] = '\0'; |
| 2350 | if (!strcmp(users_list, "sslpeer=")) { |
| 2351 | sprintf(u, "+%s", upeer); |
| 2352 | } else { |
| 2353 | char *p, *str = strdup(users_list); |
| 2354 | p = strtok(str + strlen("sslpeer="), ","); |
| 2355 | while (p) { |
| 2356 | if (!strcmp(p, upeer)) { |
| 2357 | sprintf(u, "+%s", upeer); |
| 2358 | break; |
| 2359 | } |
| 2360 | p = strtok(NULL, ","); |
| 2361 | } |
| 2362 | free(str); |
| 2363 | } |
| 2364 | if (u[0] == '\0') { |
| 2365 | rfbLog("sslpeer cannot determine user: %s\n", upeer); |
| 2366 | free(u); |
| 2367 | return NULL; |
| 2368 | } |
| 2369 | free(u); |
| 2370 | return upeer; |
| 2371 | } |
| 2372 | |
| 2373 | static void do_try_switch(char *usslpeer, char *users_list_save) { |
| 2374 | if (unixpw_system_greeter_active == 2) { |
| 2375 | rfbLog("unixpw_system_greeter: not trying switch to user '%s'\n", usslpeer ? usslpeer : ""); |
| 2376 | return; |
| 2377 | } |
| 2378 | if (usslpeer) { |
| 2379 | char *u = (char *) malloc(strlen(usslpeer+2)); |
| 2380 | sprintf(u, "+%s", usslpeer); |
| 2381 | if (switch_user(u, 0)) { |
| 2382 | rfbLog("sslpeer switched to user: %s\n", usslpeer); |
| 2383 | } else { |
| 2384 | rfbLog("sslpeer failed to switch to user: %s\n", usslpeer); |
| 2385 | } |
| 2386 | free(u); |
| 2387 | |
| 2388 | } else if (users_list_save && keep_unixpw_user) { |
| 2389 | char *user = keep_unixpw_user; |
| 2390 | char *u = (char *)malloc(strlen(user)+1); |
| 2391 | |
| 2392 | users_list = users_list_save; |
| 2393 | |
| 2394 | u[0] = '\0'; |
| 2395 | if (!strcmp(users_list, "unixpw=")) { |
| 2396 | sprintf(u, "+%s", user); |
| 2397 | } else { |
| 2398 | char *p, *str = strdup(users_list); |
| 2399 | p = strtok(str + strlen("unixpw="), ","); |
| 2400 | while (p) { |
| 2401 | if (!strcmp(p, user)) { |
| 2402 | sprintf(u, "+%s", user); |
| 2403 | break; |
| 2404 | } |
| 2405 | p = strtok(NULL, ","); |
| 2406 | } |
| 2407 | free(str); |
| 2408 | } |
| 2409 | |
| 2410 | if (u[0] == '\0') { |
| 2411 | rfbLog("unixpw_accept skipping switch to user: %s (drc)\n", user); |
| 2412 | } else if (switch_user(u, 0)) { |
| 2413 | rfbLog("unixpw_accept switched to user: %s (drc)\n", user); |
| 2414 | } else { |
| 2415 | rfbLog("unixpw_accept failed to switch to user: %s (drc)\n", user); |
| 2416 | } |
| 2417 | free(u); |
| 2418 | } |
| 2419 | } |
| 2420 | |
| 2421 | static void path_lookup(char *prog) { |
| 2422 | /* see create_display script */ |
| 2423 | char *create_display_extra = "/usr/X11R6/bin:/usr/bin/X11:/usr/openwin/bin:/usr/dt/bin:/opt/kde4/bin:/opt/kde3/bin:/opt/gnome/bin:/usr/bin:/bin:/usr/sfw/bin:/usr/local/bin"; |
| 2424 | char *path, *try, *p; |
| 2425 | int found = 0, len = strlen(create_display_extra); |
| 2426 | |
| 2427 | if (getenv("PATH")) { |
| 2428 | len += strlen(getenv("PATH")) + 1; |
| 2429 | path = (char *) malloc((len+1) * sizeof(char)); |
| 2430 | sprintf(path, "%s:%s", getenv("PATH"), create_display_extra); |
| 2431 | } else { |
| 2432 | path = (char *) malloc((len+1) * sizeof(char)); |
| 2433 | sprintf(path, "%s", create_display_extra); |
| 2434 | } |
| 2435 | try = (char *) malloc((len+2+strlen(prog)) * sizeof(char)); |
| 2436 | |
| 2437 | p = strtok(path, ":"); |
| 2438 | while (p) { |
| 2439 | struct stat sbuf; |
| 2440 | |
| 2441 | sprintf(try, "%s/%s", p, prog); |
| 2442 | if (stat(try, &sbuf) == 0) { |
| 2443 | found = 1; |
| 2444 | break; |
| 2445 | } |
| 2446 | p = strtok(NULL, ":"); |
| 2447 | } |
| 2448 | |
| 2449 | free(path); |
| 2450 | free(try); |
| 2451 | |
| 2452 | if (!found) { |
| 2453 | fprintf(stderr, "\n"); |
| 2454 | fprintf(stderr, "The program \"%s\" could not be found in PATH and standard locations.\n", prog); |
| 2455 | fprintf(stderr, "You probably need to install a package that provides the \"%s\" program.\n", prog); |
| 2456 | fprintf(stderr, "Without it FINDCREATEDISPLAY mode may not be able to create an X display.\n"); |
| 2457 | fprintf(stderr, "\n"); |
| 2458 | } |
| 2459 | } |
| 2460 | |
| 2461 | static int do_run_cmd(char *cmd, char *create_cmd, char *users_list_save, int created_disp, int db) { |
| 2462 | char tmp[] = "/tmp/x11vnc-find_display.XXXXXX"; |
| 2463 | char line1[1024], line2[16384]; |
| 2464 | char *q, *usslpeer = NULL; |
| 2465 | int n, nodisp = 0, saw_xdmcp = 0; |
| 2466 | int tmp_fd = -1; |
| 2467 | int internal_cmd = 0; |
| 2468 | int tried_switch = 0; |
| 2469 | |
| 2470 | memset(line1, 0, sizeof(line1)); |
| 2471 | memset(line2, 0, sizeof(line2)); |
| 2472 | |
| 2473 | if (users_list && strstr(users_list, "sslpeer=") == users_list) { |
| 2474 | usslpeer = get_usslpeer(); |
| 2475 | if (! usslpeer) { |
| 2476 | return 0; |
| 2477 | } |
| 2478 | } |
| 2479 | if (getenv("DEBUG_RUN_CMD")) db = 1; |
| 2480 | |
| 2481 | /* only sets environment variables: */ |
| 2482 | run_user_command("", latest_client, "env", NULL, 0, NULL); |
| 2483 | |
| 2484 | if (program_name) { |
| 2485 | set_env("X11VNC_PROG", program_name); |
| 2486 | } else { |
| 2487 | set_env("X11VNC_PROG", "x11vnc"); |
| 2488 | } |
| 2489 | |
| 2490 | if (!strcmp(cmd, "FINDDISPLAY") || |
| 2491 | strstr(cmd, "FINDCREATEDISPLAY") == cmd) { |
| 2492 | char *nd = ""; |
| 2493 | char *tag = ""; |
| 2494 | char fdout[128]; |
| 2495 | |
| 2496 | internal_cmd = 1; |
| 2497 | |
| 2498 | tmp_fd = mkstemp(tmp); |
| 2499 | |
| 2500 | if (tmp_fd < 0) { |
| 2501 | rfbLog("wait_for_client: open failed: %s\n", tmp); |
| 2502 | rfbLogPerror("mkstemp"); |
| 2503 | clean_up_exit(1); |
| 2504 | } |
| 2505 | chmod(tmp, 0644); |
| 2506 | if (getenv("X11VNC_FINDDISPLAY_ALWAYS_FAILS")) { |
| 2507 | char *s = "#!/bin/sh\necho _FAIL_\nexit 1\n"; |
| 2508 | write(tmp_fd, s, strlen(s)); |
| 2509 | } else { |
| 2510 | write(tmp_fd, find_display, strlen(find_display)); |
| 2511 | } |
| 2512 | close(tmp_fd); |
| 2513 | nodisp = 1; |
| 2514 | |
| 2515 | if (strstr(cmd, "FINDCREATEDISPLAY") == cmd) { |
| 2516 | create_cmd = build_create_cmd(cmd, &saw_xdmcp, usslpeer, tmp); |
| 2517 | if (db) fprintf(stderr, "create_cmd: %s\n", create_cmd); |
| 2518 | } |
| 2519 | if (getenv("X11VNC_SKIP_DISPLAY")) { |
| 2520 | nd = strdup(getenv("X11VNC_SKIP_DISPLAY")); |
| 2521 | } |
| 2522 | check_nodisplay(&nd, &tag); |
| 2523 | |
| 2524 | fdout[0] = '\0'; |
| 2525 | if (getenv("FIND_DISPLAY_OUTPUT")) { |
| 2526 | snprintf(fdout, 120, " FIND_DISPLAY_OUTPUT='%s' ", getenv("FIND_DISPLAY_OUTPUT")); |
| 2527 | } |
| 2528 | |
| 2529 | cmd = (char *) malloc(strlen("env X11VNC_SKIP_DISPLAY='' ") |
| 2530 | + strlen(nd) + strlen(" FD_TAG='' ") + strlen(tag) + strlen(tmp) + strlen("/bin/sh ") + strlen(fdout) + 1); |
| 2531 | |
| 2532 | if (strcmp(tag, "")) { |
| 2533 | sprintf(cmd, "env X11VNC_SKIP_DISPLAY='%s' FD_TAG='%s' %s /bin/sh %s", nd, tag, fdout, tmp); |
| 2534 | } else { |
| 2535 | sprintf(cmd, "env X11VNC_SKIP_DISPLAY='%s' %s /bin/sh %s", nd, fdout, tmp); |
| 2536 | } |
| 2537 | } |
| 2538 | |
| 2539 | rfbLog("wait_for_client: running: %s\n", cmd); |
| 2540 | |
| 2541 | if (create_cmd != NULL) { |
| 2542 | if (strstr(create_cmd, "Xvfb")) { |
| 2543 | path_lookup("Xvfb"); |
| 2544 | } |
| 2545 | if (strstr(create_cmd, "Xvnc")) { |
| 2546 | path_lookup("Xvnc"); |
| 2547 | } |
| 2548 | if (strstr(create_cmd, "Xdummy")) { |
| 2549 | path_lookup("Xdummy"); |
| 2550 | } |
| 2551 | } |
| 2552 | |
| 2553 | if (unixpw && !unixpw_nis) { |
| 2554 | int res = 0, k, j, i; |
| 2555 | char line[18000]; |
| 2556 | |
| 2557 | memset(line, 0, sizeof(line)); |
| 2558 | |
| 2559 | if (unixpw_system_greeter_active == 2) { |
| 2560 | rfbLog("unixpw_system_greeter: forcing find display failure.\n"); |
| 2561 | res = 0; |
| 2562 | } else if (keep_unixpw_user && keep_unixpw_pass) { |
| 2563 | n = sizeof(line); |
| 2564 | if (unixpw_cmd != NULL) { |
| 2565 | res = unixpw_cmd_run(keep_unixpw_user, |
| 2566 | keep_unixpw_pass, cmd, line, &n); |
| 2567 | } else { |
| 2568 | res = su_verify(keep_unixpw_user, |
| 2569 | keep_unixpw_pass, cmd, line, &n, nodisp); |
| 2570 | } |
| 2571 | } |
| 2572 | |
| 2573 | if (db) {fprintf(stderr, "line: "); write(2, line, n); write(2, "\n", 1); fprintf(stderr, "res=%d n=%d\n", res, n);} |
| 2574 | if (! res) { |
| 2575 | rfbLog("wait_for_client: find display cmd failed.\n"); |
| 2576 | } |
| 2577 | |
| 2578 | if (! res && create_cmd) { |
| 2579 | FILE *mt = fopen(tmp, "w"); |
| 2580 | if (! mt) { |
| 2581 | rfbLog("wait_for_client: open failed: %s\n", tmp); |
| 2582 | rfbLogPerror("fopen"); |
| 2583 | clean_up_exit(1); |
| 2584 | } |
| 2585 | fprintf(mt, "%s", create_display); |
| 2586 | fclose(mt); |
| 2587 | |
| 2588 | findcreatedisplay = 1; |
| 2589 | |
| 2590 | if (unixpw_cmd != NULL) { |
| 2591 | /* let the external unixpw command do it: */ |
| 2592 | n = sizeof(line); |
| 2593 | close_exec_fds(); |
| 2594 | res = unixpw_cmd_run(keep_unixpw_user, |
| 2595 | keep_unixpw_pass, create_cmd, line, &n); |
| 2596 | } else if (getuid() != 0 && unixpw_system_greeter_active != 2) { |
| 2597 | /* if not root, run as the other user... */ |
| 2598 | n = sizeof(line); |
| 2599 | close_exec_fds(); |
| 2600 | res = su_verify(keep_unixpw_user, |
| 2601 | keep_unixpw_pass, create_cmd, line, &n, nodisp); |
| 2602 | if (db) fprintf(stderr, "c-res=%d n=%d line: '%s'\n", res, n, line); |
| 2603 | |
| 2604 | } else { |
| 2605 | FILE *p; |
| 2606 | close_exec_fds(); |
| 2607 | if (unixpw_system_greeter_active == 2) { |
| 2608 | rfbLog("unixpw_system_greeter: not trying su_verify() to run\n"); |
| 2609 | rfbLog("unixpw_system_greeter: create display command.\n"); |
| 2610 | } |
| 2611 | rfbLog("wait_for_client: running: %s\n", create_cmd); |
| 2612 | p = popen(create_cmd, "r"); |
| 2613 | if (! p) { |
| 2614 | rfbLog("wait_for_client: popen failed: %s\n", create_cmd); |
| 2615 | res = 0; |
| 2616 | } else if (fgets(line1, 1024, p) == NULL) { |
| 2617 | rfbLog("wait_for_client: read failed: %s\n", create_cmd); |
| 2618 | res = 0; |
| 2619 | } else { |
| 2620 | n = fread(line2, 1, 16384, p); |
| 2621 | if (pclose(p) != 0) { |
| 2622 | res = 0; |
| 2623 | } else { |
| 2624 | strncpy(line, line1, 100); |
| 2625 | memcpy(line + strlen(line1), line2, n); |
| 2626 | if (db) fprintf(stderr, "line1: '%s'\n", line1); |
| 2627 | n += strlen(line1); |
| 2628 | created_disp = 1; |
| 2629 | res = 1; |
| 2630 | } |
| 2631 | } |
| 2632 | } |
| 2633 | if (res && saw_xdmcp && unixpw_system_greeter_active != 2) { |
| 2634 | xdmcp_insert = strdup(keep_unixpw_user); |
| 2635 | } |
| 2636 | } |
| 2637 | |
| 2638 | if (tmp_fd >= 0) { |
| 2639 | unlink(tmp); |
| 2640 | } |
| 2641 | |
| 2642 | if (! res) { |
| 2643 | rfbLog("wait_for_client: cmd failed: %s\n", cmd); |
| 2644 | unixpw_msg("No DISPLAY found.", 3); |
| 2645 | clean_up_exit(1); |
| 2646 | } |
| 2647 | |
| 2648 | /* |
| 2649 | * we need to hunt for DISPLAY= since there may be |
| 2650 | * a login banner or something at the beginning. |
| 2651 | */ |
| 2652 | q = strstr(line, "DISPLAY="); |
| 2653 | if (! q) { |
| 2654 | q = line; |
| 2655 | } |
| 2656 | n -= (q - line); |
| 2657 | |
| 2658 | for (k = 0; k < 1024; k++) { |
| 2659 | line1[k] = q[k]; |
| 2660 | if (q[k] == '\n') { |
| 2661 | k++; |
| 2662 | break; |
| 2663 | } |
| 2664 | } |
| 2665 | n -= k; |
| 2666 | i = 0; |
| 2667 | for (j = 0; j < 16384; j++) { |
| 2668 | if (j < 16384 - 1) { |
| 2669 | /* xauth data, assume pty added CR */ |
| 2670 | if (q[k+j] == '\r' && q[k+j+1] == '\n') { |
| 2671 | continue; |
| 2672 | } |
| 2673 | } |
| 2674 | |
| 2675 | line2[i] = q[k+j]; |
| 2676 | i++; |
| 2677 | } |
| 2678 | if (db) write(2, line, 100); |
| 2679 | if (db) fprintf(stderr, "\n"); |
| 2680 | |
| 2681 | } else { |
| 2682 | FILE *p; |
| 2683 | int rc; |
| 2684 | close_exec_fds(); |
| 2685 | |
| 2686 | if (usslpeer) { |
| 2687 | char *c; |
| 2688 | if (getuid() == 0) { |
| 2689 | c = (char *) malloc(strlen("su - '' -c \"") |
| 2690 | + strlen(usslpeer) + strlen(cmd) + 1 + 1); |
| 2691 | sprintf(c, "su - '%s' -c \"%s\"", usslpeer, cmd); |
| 2692 | } else { |
| 2693 | c = strdup(cmd); |
| 2694 | } |
| 2695 | p = popen(c, "r"); |
| 2696 | free(c); |
| 2697 | |
| 2698 | } else if (unixpw_nis && keep_unixpw_user) { |
| 2699 | char *c; |
| 2700 | if (getuid() == 0) { |
| 2701 | c = (char *) malloc(strlen("su - '' -c \"") |
| 2702 | + strlen(keep_unixpw_user) + strlen(cmd) + 1 + 1); |
| 2703 | sprintf(c, "su - '%s' -c \"%s\"", keep_unixpw_user, cmd); |
| 2704 | } else { |
| 2705 | c = strdup(cmd); |
| 2706 | } |
| 2707 | p = popen(c, "r"); |
| 2708 | free(c); |
| 2709 | |
| 2710 | } else { |
| 2711 | p = popen(cmd, "r"); |
| 2712 | } |
| 2713 | |
| 2714 | if (! p) { |
| 2715 | rfbLog("wait_for_client: cmd failed: %s\n", cmd); |
| 2716 | rfbLogPerror("popen"); |
| 2717 | if (tmp_fd >= 0) { |
| 2718 | unlink(tmp); |
| 2719 | } |
| 2720 | clean_up_exit(1); |
| 2721 | } |
| 2722 | if (fgets(line1, 1024, p) == NULL) { |
| 2723 | rfbLog("wait_for_client: read failed: %s\n", cmd); |
| 2724 | rfbLogPerror("fgets"); |
| 2725 | if (tmp_fd >= 0) { |
| 2726 | unlink(tmp); |
| 2727 | } |
| 2728 | clean_up_exit(1); |
| 2729 | } |
| 2730 | n = fread(line2, 1, 16384, p); |
| 2731 | rc = pclose(p); |
| 2732 | |
| 2733 | if (rc != 0) { |
| 2734 | rfbLog("wait_for_client: find display cmd failed.\n"); |
| 2735 | } |
| 2736 | |
| 2737 | if (create_cmd && rc != 0) { |
| 2738 | FILE *mt = fopen(tmp, "w"); |
| 2739 | if (! mt) { |
| 2740 | rfbLog("wait_for_client: open failed: %s\n", tmp); |
| 2741 | rfbLogPerror("fopen"); |
| 2742 | if (tmp_fd >= 0) { |
| 2743 | unlink(tmp); |
| 2744 | } |
| 2745 | clean_up_exit(1); |
| 2746 | } |
| 2747 | fprintf(mt, "%s", create_display); |
| 2748 | fclose(mt); |
| 2749 | |
| 2750 | findcreatedisplay = 1; |
| 2751 | |
| 2752 | rfbLog("wait_for_client: FINDCREATEDISPLAY cmd: %s\n", create_cmd); |
| 2753 | |
| 2754 | p = popen(create_cmd, "r"); |
| 2755 | if (! p) { |
| 2756 | rfbLog("wait_for_client: cmd failed: %s\n", create_cmd); |
| 2757 | rfbLogPerror("popen"); |
| 2758 | if (tmp_fd >= 0) { |
| 2759 | unlink(tmp); |
| 2760 | } |
| 2761 | clean_up_exit(1); |
| 2762 | } |
| 2763 | if (fgets(line1, 1024, p) == NULL) { |
| 2764 | rfbLog("wait_for_client: read failed: %s\n", create_cmd); |
| 2765 | rfbLogPerror("fgets"); |
| 2766 | if (tmp_fd >= 0) { |
| 2767 | unlink(tmp); |
| 2768 | } |
| 2769 | clean_up_exit(1); |
| 2770 | } |
| 2771 | n = fread(line2, 1, 16384, p); |
| 2772 | pclose(p); |
| 2773 | } |
| 2774 | if (tmp_fd >= 0) { |
| 2775 | unlink(tmp); |
| 2776 | } |
| 2777 | } |
| 2778 | |
| 2779 | if (db) fprintf(stderr, "line1=%s\n", line1); |
| 2780 | |
| 2781 | if (strstr(line1, "DISPLAY=") != line1) { |
| 2782 | rfbLog("wait_for_client: bad reply '%s'\n", line1); |
| 2783 | if (unixpw) { |
| 2784 | unixpw_msg("No DISPLAY found.", 3); |
| 2785 | } |
| 2786 | clean_up_exit(1); |
| 2787 | } |
| 2788 | |
| 2789 | |
| 2790 | if (strstr(line1, ",VT=")) { |
| 2791 | int vt; |
| 2792 | char *t = strstr(line1, ",VT="); |
| 2793 | vt = atoi(t + strlen(",VT=")); |
| 2794 | *t = '\0'; |
| 2795 | if (7 <= vt && vt <= 15) { |
| 2796 | do_chvt(vt); |
| 2797 | } |
| 2798 | } else if (strstr(line1, ",XPID=")) { |
| 2799 | int i, pvt, vt = -1; |
| 2800 | char *t = strstr(line1, ",XPID="); |
| 2801 | pvt = atoi(t + strlen(",XPID=")); |
| 2802 | *t = '\0'; |
| 2803 | if (pvt > 0) { |
| 2804 | for (i=3; i <= 10; i++) { |
| 2805 | int k; |
| 2806 | char proc[100]; |
| 2807 | char buf[100]; |
| 2808 | sprintf(proc, "/proc/%d/fd/%d", pvt, i); |
| 2809 | if (db) fprintf(stderr, "%d -- %s\n", i, proc); |
| 2810 | for (k=0; k < 100; k++) { |
| 2811 | buf[k] = '\0'; |
| 2812 | } |
| 2813 | |
| 2814 | if (readlink(proc, buf, 100) != -1) { |
| 2815 | buf[100-1] = '\0'; |
| 2816 | if (db) fprintf(stderr, "%d -- %s -- %s\n", i, proc, buf); |
| 2817 | if (strstr(buf, "/dev/tty") == buf) { |
| 2818 | vt = atoi(buf + strlen("/dev/tty")); |
| 2819 | if (vt > 0) { |
| 2820 | break; |
| 2821 | } |
| 2822 | } |
| 2823 | } |
| 2824 | } |
| 2825 | } |
| 2826 | if (7 <= vt && vt <= 12) { |
| 2827 | do_chvt(vt); |
| 2828 | } |
| 2829 | } |
| 2830 | |
| 2831 | use_dpy = strdup(line1 + strlen("DISPLAY=")); |
| 2832 | q = use_dpy; |
| 2833 | while (*q != '\0') { |
| 2834 | if (*q == '\n' || *q == '\r') *q = '\0'; |
| 2835 | q++; |
| 2836 | } |
| 2837 | if (line2[0] != '\0') { |
| 2838 | if (strstr(line2, "XAUTHORITY=") == line2) { |
| 2839 | q = line2; |
| 2840 | while (*q != '\0') { |
| 2841 | if (*q == '\n' || *q == '\r') *q = '\0'; |
| 2842 | q++; |
| 2843 | } |
| 2844 | if (auth_file) { |
| 2845 | free(auth_file); |
| 2846 | } |
| 2847 | auth_file = strdup(line2 + strlen("XAUTHORITY=")); |
| 2848 | |
| 2849 | } else { |
| 2850 | xauth_raw_data = (char *)malloc(n); |
| 2851 | xauth_raw_len = n; |
| 2852 | memcpy(xauth_raw_data, line2, n); |
| 2853 | if (db) {fprintf(stderr, "xauth_raw_len: %d\n", n); |
| 2854 | write(2, xauth_raw_data, n); |
| 2855 | fprintf(stderr, "\n");} |
| 2856 | } |
| 2857 | } |
| 2858 | |
| 2859 | if (!tried_switch) { |
| 2860 | do_try_switch(usslpeer, users_list_save); |
| 2861 | tried_switch = 1; |
| 2862 | } |
| 2863 | |
| 2864 | if (unixpw) { |
| 2865 | /* Some cleanup and messaging for -unixpw case: */ |
| 2866 | char str[32]; |
| 2867 | |
| 2868 | if (keep_unixpw_user && keep_unixpw_pass) { |
| 2869 | strzero(keep_unixpw_user); |
| 2870 | strzero(keep_unixpw_pass); |
| 2871 | keep_unixpw = 0; |
| 2872 | } |
| 2873 | |
| 2874 | if (created_disp) { |
| 2875 | snprintf(str, 30, "Created DISPLAY %s", use_dpy); |
| 2876 | } else { |
| 2877 | snprintf(str, 30, "Using DISPLAY %s", use_dpy); |
| 2878 | } |
| 2879 | unixpw_msg(str, 2); |
| 2880 | } |
| 2881 | return 1; |
| 2882 | } |
| 2883 | |
| 2884 | void ssh_remote_tunnel(char *, int); |
| 2885 | |
| 2886 | static XImage ximage_struct; |
| 2887 | |
| 2888 | void progress_client(void) { |
| 2889 | int i, j = 0, progressed = 0, db = 0; |
| 2890 | double start = dnow(); |
| 2891 | if (getenv("PROGRESS_CLIENT_DBG")) { |
| 2892 | rfbLog("progress_client: begin\n"); |
| 2893 | db = 1; |
| 2894 | } |
| 2895 | for (i = 0; i < 15; i++) { |
| 2896 | if (latest_client) { |
| 2897 | for (j = 0; j < 10; j++) { |
| 2898 | if (latest_client->state != RFB_PROTOCOL_VERSION) { |
| 2899 | progressed = 1; |
| 2900 | break; |
| 2901 | } |
| 2902 | if (db) rfbLog("progress_client: calling-1 rfbCFD(1) %.6f\n", dnow()-start); |
| 2903 | rfbCFD(1); |
| 2904 | } |
| 2905 | } |
| 2906 | if (progressed) { |
| 2907 | break; |
| 2908 | } |
| 2909 | if (db) rfbLog("progress_client: calling-2 rfbCFD(1) %.6f\n", dnow()-start); |
| 2910 | rfbCFD(1); |
| 2911 | } |
| 2912 | if (!quiet) { |
| 2913 | rfbLog("client progressed=%d in %d/%d %.6f s\n", |
| 2914 | progressed, i, j, dnow() - start); |
| 2915 | } |
| 2916 | } |
| 2917 | |
| 2918 | int wait_for_client(int *argc, char** argv, int http) { |
| 2919 | /* ugh, here we go... */ |
| 2920 | XImage* fb_image; |
| 2921 | int w = 640, h = 480, b = 32; |
| 2922 | int w0 = -1, h0 = -1, i, chg_raw_fb = 0; |
| 2923 | char *str, *q, *cmd = NULL; |
| 2924 | int db = 0, dt = 0; |
| 2925 | char *create_cmd = NULL; |
| 2926 | char *users_list_save = NULL; |
| 2927 | int created_disp = 0, ncache_save; |
| 2928 | int did_client_connect = 0; |
| 2929 | char *vnc_redirect_host = "localhost"; |
| 2930 | int vnc_redirect_port = -1, vnc_redirect_cnt = 0; |
| 2931 | char vnc_redirect_test[10]; |
| 2932 | |
| 2933 | if (getenv("WAIT_FOR_CLIENT_DB")) { |
| 2934 | db = 1; |
| 2935 | } |
| 2936 | |
| 2937 | vnc_redirect = 0; |
| 2938 | |
| 2939 | if (! use_dpy || strstr(use_dpy, "WAIT:") != use_dpy) { |
| 2940 | return 0; |
| 2941 | } |
| 2942 | |
| 2943 | for (i=0; i < *argc; i++) { |
| 2944 | if (!strcmp(argv[i], "-desktop")) { |
| 2945 | dt = 1; |
| 2946 | } |
| 2947 | if (db) fprintf(stderr, "args %d %s\n", i, argv[i]); |
| 2948 | } |
| 2949 | if (!quiet && !strstr(use_dpy, "FINDDISPLAY-run")) { |
| 2950 | rfbLog("\n"); |
| 2951 | rfbLog("wait_for_client: %s\n", use_dpy); |
| 2952 | rfbLog("\n"); |
| 2953 | } |
| 2954 | |
| 2955 | str = strdup(use_dpy); |
| 2956 | str += strlen("WAIT"); |
| 2957 | |
| 2958 | xdmcp_insert = NULL; |
| 2959 | |
| 2960 | /* get any leading geometry: */ |
| 2961 | q = strchr(str+1, ':'); |
| 2962 | if (q) { |
| 2963 | *q = '\0'; |
| 2964 | if (sscanf(str+1, "%dx%d", &w0, &h0) == 2) { |
| 2965 | w = w0; |
| 2966 | h = h0; |
| 2967 | rfbLog("wait_for_client set: w=%d h=%d\n", w, h); |
| 2968 | } else { |
| 2969 | w0 = -1; |
| 2970 | h0 = -1; |
| 2971 | } |
| 2972 | *q = ':'; |
| 2973 | str = q; |
| 2974 | } |
| 2975 | if ((w0 == -1 || h0 == -1) && pad_geometry != NULL) { |
| 2976 | int b0, del = 0; |
| 2977 | char *s = pad_geometry; |
| 2978 | if (strstr(s, "once:") == s) { |
| 2979 | del = 1; |
| 2980 | s += strlen("once:"); |
| 2981 | } |
| 2982 | if (sscanf(s, "%dx%dx%d", &w0, &h0, &b0) == 3) { |
| 2983 | w = nabs(w0); |
| 2984 | h = nabs(h0); |
| 2985 | b = nabs(b0); |
| 2986 | } else if (sscanf(s, "%dx%d", &w0, &h0) == 2) { |
| 2987 | w = nabs(w0); |
| 2988 | h = nabs(h0); |
| 2989 | } |
| 2990 | if (del) { |
| 2991 | pad_geometry = NULL; |
| 2992 | } |
| 2993 | } |
| 2994 | |
| 2995 | /* str currently begins with a ':' */ |
| 2996 | if (strstr(str, ":cmd=") == str) { |
| 2997 | /* cmd=/path/to/mycommand */ |
| 2998 | str++; |
| 2999 | } else if (strpbrk(str, "0123456789") == str+1) { |
| 3000 | /* :0.0 */ |
| 3001 | ; |
| 3002 | } else { |
| 3003 | /* hostname:0.0 */ |
| 3004 | str++; |
| 3005 | } |
| 3006 | |
| 3007 | if (db) fprintf(stderr, "str: %s\n", str); |
| 3008 | |
| 3009 | if (strstr(str, "cmd=") == str) { |
| 3010 | cmd = setup_cmd(str, &vnc_redirect, &vnc_redirect_host, &vnc_redirect_port, db); |
| 3011 | } |
| 3012 | |
| 3013 | fb_image = &ximage_struct; |
| 3014 | setup_fake_fb(fb_image, w, h, b); |
| 3015 | |
| 3016 | if (! dt) { |
| 3017 | char *s; |
| 3018 | argv[*argc] = strdup("-desktop"); |
| 3019 | *argc = (*argc) + 1; |
| 3020 | |
| 3021 | if (cmd) { |
| 3022 | char *q; |
| 3023 | s = choose_title(":0"); |
| 3024 | q = strstr(s, ":0"); |
| 3025 | if (q) { |
| 3026 | *q = '\0'; |
| 3027 | } |
| 3028 | } else { |
| 3029 | s = choose_title(str); |
| 3030 | } |
| 3031 | rfb_desktop_name = strdup(s); |
| 3032 | argv[*argc] = s; |
| 3033 | *argc = (*argc) + 1; |
| 3034 | } |
| 3035 | |
| 3036 | ncache_save = ncache; |
| 3037 | ncache = 0; |
| 3038 | |
| 3039 | initialize_allowed_input(); |
| 3040 | |
| 3041 | if (! multiple_cursors_mode) { |
| 3042 | multiple_cursors_mode = strdup("default"); |
| 3043 | } |
| 3044 | initialize_cursors_mode(); |
| 3045 | |
| 3046 | initialize_screen(argc, argv, fb_image); |
| 3047 | |
| 3048 | if (! inetd && ! use_openssl) { |
| 3049 | if (! screen->port || screen->listenSock < 0) { |
| 3050 | if (got_rfbport && got_rfbport_val == 0) { |
| 3051 | ; |
| 3052 | } else if (ipv6_listen && ipv6_listen_fd >= 0) { |
| 3053 | rfbLog("Info: listening on IPv6 interface only. (wait for client)\n"); |
| 3054 | } else { |
| 3055 | rfbLogEnable(1); |
| 3056 | rfbLog("Error: could not obtain listening port. (wait for client)\n"); |
| 3057 | if (!got_rfbport && !got_ipv6_listen) { |
| 3058 | rfbLog("If this system is IPv6-only, use the -6 option.\n"); |
| 3059 | } |
| 3060 | clean_up_exit(1); |
| 3061 | } |
| 3062 | } |
| 3063 | } |
| 3064 | |
| 3065 | initialize_signals(); |
| 3066 | |
| 3067 | if (ssh_str != NULL) { |
| 3068 | ssh_remote_tunnel(ssh_str, screen->port); |
| 3069 | } |
| 3070 | |
| 3071 | if (! raw_fb) { |
| 3072 | chg_raw_fb = 1; |
| 3073 | /* kludge to get RAWFB_RET with dpy == NULL guards */ |
| 3074 | raw_fb = (char *) 0x1; |
| 3075 | } |
| 3076 | |
| 3077 | if (cmd && !strcmp(cmd, "HTTPONCE")) { |
| 3078 | handle_one_http_request(); |
| 3079 | clean_up_exit(0); |
| 3080 | } |
| 3081 | |
| 3082 | if (http && check_httpdir()) { |
| 3083 | http_connections(1); |
| 3084 | } |
| 3085 | |
| 3086 | if (cmd && unixpw) { |
| 3087 | keep_unixpw = 1; |
| 3088 | } |
| 3089 | |
| 3090 | setup_service(); |
| 3091 | |
| 3092 | check_waitbg(); |
| 3093 | |
| 3094 | if (vnc_redirect) { |
| 3095 | vnc_redirect_loop(vnc_redirect_test, &vnc_redirect_cnt); |
| 3096 | } else { |
| 3097 | |
| 3098 | if (use_threads && !started_rfbRunEventLoop) { |
| 3099 | started_rfbRunEventLoop = 1; |
| 3100 | rfbRunEventLoop(screen, -1, TRUE); |
| 3101 | } |
| 3102 | |
| 3103 | if (inetd && use_openssl) { |
| 3104 | accept_openssl(OPENSSL_INETD, -1); |
| 3105 | } |
| 3106 | |
| 3107 | setup_client_connect(&did_client_connect); |
| 3108 | |
| 3109 | loop_for_connect(did_client_connect); |
| 3110 | |
| 3111 | if (unixpw) { |
| 3112 | if (cmd && strstr(cmd, "FINDCREATEDISPLAY") == cmd) { |
| 3113 | if (users_list && strstr(users_list, "unixpw=") == users_list) { |
| 3114 | users_list_save = users_list; |
| 3115 | users_list = NULL; |
| 3116 | } |
| 3117 | } |
| 3118 | do_unixpw_loop(); |
| 3119 | } else if (cmd && !use_threads) { |
| 3120 | /* try to get RFB proto done now. */ |
| 3121 | progress_client(); |
| 3122 | } |
| 3123 | } |
| 3124 | |
| 3125 | if (vnc_redirect == 2) { |
| 3126 | ; |
| 3127 | } else if (cmd) { |
| 3128 | if (!do_run_cmd(cmd, create_cmd, users_list_save, created_disp, db)) { |
| 3129 | return 0; |
| 3130 | } |
| 3131 | } else { |
| 3132 | use_dpy = strdup(str); |
| 3133 | } |
| 3134 | if (chg_raw_fb) { |
| 3135 | raw_fb = NULL; |
| 3136 | } |
| 3137 | |
| 3138 | ncache = ncache_save; |
| 3139 | |
| 3140 | if (unixpw && keep_unixpw_opts && keep_unixpw_opts[0] != '\0') { |
| 3141 | user_supplied_opts(keep_unixpw_opts); |
| 3142 | } |
| 3143 | if (create_cmd) { |
| 3144 | free(create_cmd); |
| 3145 | } |
| 3146 | |
| 3147 | if (vnc_redirect) { |
| 3148 | do_vnc_redirect(created_disp, vnc_redirect_host, vnc_redirect_port, |
| 3149 | vnc_redirect_cnt, vnc_redirect_test); |
| 3150 | clean_up_exit(0); |
| 3151 | } |
| 3152 | |
| 3153 | return 1; |
| 3154 | } |
| 3155 | |