/* * x11vnc: a VNC server for X displays. * * Copyright (c) 2002-2006 Karl J. Runge * All rights reserved. * * This is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this software; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, * USA. * * * This program is based heavily on the following programs: * * the originial x11vnc.c in libvncserver (Johannes E. Schindelin) * x0rfbserver, the original native X vnc server (Jens Wagner) * krfb, the KDE desktopsharing project (Tim Jansen) * * The primary goal of this program is to create a portable and simple * command-line server utility that allows a VNC viewer to connect * to an actual X display (as the above do). The only non-standard * dependency of this program is the static library libvncserver.a. * Although in some environments libjpeg.so or libz.so may not be * readily available and needs to be installed, they may be found * at ftp://ftp.uu.net/graphics/jpeg/ and http://www.gzip.org/zlib/, * respectively. To increase portability it is written in plain C. * * Another goal is to improve performance and interactive response. * The algorithm of x0rfbserver was used as a base. Many additional * heuristics are also applied. * * Another goal is to add many features that enable and incourage creative * usage and application of the tool. Apologies for the large number * of options! * * To build: * * Obtain the libvncserver package (http://libvncserver.sourceforge.net). * As of 12/2002 this version of x11vnc.c is contained in the libvncserver * CVS tree and released in version 0.5. * * gcc should be used on all platforms. To build a threaded version put * "-D_REENTRANT -DX11VNC_THREADED" in the environment variable CFLAGS * or CPPFLAGS (e.g. before running the libvncserver configure). The * threaded mode is a bit more responsive, but can be unstable (e.g. * if more than one client the same tight or zrle encoding). * * Known shortcomings: * * The screen updates are good, but of course not perfect since the X * display must be continuously polled and read for changes and this is * slow for most hardware. This can be contrasted with receiving a change * callback from the X server, if that were generally possible... (UPDATE: * this is handled now with the X DAMAGE extension, but unfortunately * that doesn't seem to address the slow read from the video h/w). So, * e.g., opaque moves and similar window activity can be very painful; * one has to modify one's behavior a bit. * * General audio at the remote display is lost unless one separately * sets up some audio side-channel such as esd. * * It does not appear possible to query the X server for the current * cursor shape. We can use XTest to compare cursor to current window's * cursor, but we cannot extract what the cursor is... (UPDATE: we now * use XFIXES extension for this. Also on Solaris and IRIX Overlay * extensions exists that allow drawing the mouse into the framebuffer) * * The current *position* of the remote X mouse pointer is shown with * the -cursor option. Further, if -cursorX or -X is used, a trick * is done to at least show the root window cursor vs non-root cursor. * (perhaps some heuristic can be done to further distinguish cases..., * currently "-cursor some" is a first hack at this) * * Under XFIXES mode for showing the cursor shape, the cursor may be * poorly approximated if it has transparency (alpha channel). * * Windows using visuals other than the default X visual may have * their colors messed up. When using 8bpp indexed color, the colormap * is attempted to be followed, but may become out of date. Use the * -flashcmap option to have colormap flashing as the pointer moves * windows with private colormaps (slow). Displays with mixed depth 8 and * 24 visuals will incorrectly display windows using the non-default one. * On Sun and Sgi hardware we can to work around this with -overlay. * * Feature -id can be picky: it can crash for things like * the window not sufficiently mapped into server memory, etc (UPDATE: * we now use the -xrandr mechanisms to trap errors more robustly for * this mode). SaveUnders menus, popups, etc will not be seen. * * Under some situations the keysym unmapping is not correct, especially * if the two keyboards correspond to different languages. The -modtweak * option is the default and corrects most problems. One can use the * -xkb option to try to use the XKEYBOARD extension to clear up any * remaining problems. * * Occasionally, a few tile updates can be missed leaving a patch of * color that needs to be refreshed. This may only be when threaded, * which is no longer the default. * * There seems to be a serious bug with simultaneous clients when * threaded, currently the only workaround in this case is -nothreads * (which is now the default). * */ /* -- x11vnc.c -- */ #include "x11vnc.h" #include "xwrappers.h" #include "xdamage.h" #include "xrecord.h" #include "xevents.h" #include "xinerama.h" #include "xrandr.h" #include "xkb_bell.h" #include "win_utils.h" #include "remote.h" #include "scan.h" #include "gui.h" #include "help.h" #include "user.h" #include "cleanup.h" #include "keyboard.h" #include "pointer.h" #include "cursor.h" #include "userinput.h" #include "screen.h" #include "connections.h" #include "rates.h" #include "unixpw.h" #include "inet.h" #include "sslcmds.h" #include "sslhelper.h" #include "selection.h" #include "pm.h" #include "solid.h" /* * main routine for the x11vnc program */ static void check_cursor_changes(void); static void record_last_fb_update(void); static int choose_delay(double dt); static void watch_loop(void); static int limit_shm(void); static void check_rcfile(int argc, char **argv); static void immediate_switch_user(int argc, char* argv[]); static void print_settings(int try_http, int bg, char *gui_str); static void check_loop_mode(int argc, char* argv[]); static void check_cursor_changes(void) { static double last_push = 0.0; if (unixpw_in_progress) return; cursor_changes += check_x11_pointer(); if (cursor_changes) { double tm, max_push = 0.125, multi_push = 0.01, wait = 0.02; int cursor_shape, dopush = 0, link, latency, netrate; if (! all_clients_initialized()) { /* play it safe */ return; } if (0) cursor_shape = cursor_shape_updates_clients(screen); dtime0(&tm); link = link_rate(&latency, &netrate); if (link == LR_DIALUP) { max_push = 0.2; wait = 0.05; } else if (link == LR_BROADBAND) { max_push = 0.075; wait = 0.05; } else if (link == LR_LAN) { max_push = 0.01; } else if (latency < 5 && netrate > 200) { max_push = 0.01; } if (tm > last_push + max_push) { dopush = 1; } else if (cursor_changes > 1 && tm > last_push + multi_push) { dopush = 1; } if (dopush) { mark_rect_as_modified(0, 0, 1, 1, 1); fb_push_wait(wait, FB_MOD); last_push = tm; } else { rfbPE(0); } } cursor_changes = 0; } static void record_last_fb_update(void) { static int rbs0 = -1; static time_t last_call = 0; time_t now = time(NULL); int rbs = -1; rfbClientIteratorPtr iter; rfbClientPtr cl; if (last_fb_bytes_sent == 0) { last_fb_bytes_sent = now; last_call = now; } if (now <= last_call + 1) { /* check every second or so */ return; } if (unixpw_in_progress) return; last_call = now; if (! screen) { return; } iter = rfbGetClientIterator(screen); while( (cl = rfbClientIteratorNext(iter)) ) { #if 0 rbs += cl->rawBytesEquivalent; #else rbs += rfbStatGetSentBytesIfRaw(cl); #endif } rfbReleaseClientIterator(iter); if (rbs != rbs0) { rbs0 = rbs; if (debug_tiles > 1) { printf("record_last_fb_update: %d %d\n", (int) now, (int) last_fb_bytes_sent); } last_fb_bytes_sent = now; } } static int choose_delay(double dt) { static double t0 = 0.0, t1 = 0.0, t2 = 0.0, now; static int x0, y0, x1, y1, x2, y2, first = 1; int dx0, dy0, dx1, dy1, dm, i, msec = waitms; double cut1 = 0.15, cut2 = 0.075, cut3 = 0.25; double bogdown_time = 0.25, bave = 0.0; int bogdown = 1, bcnt = 0; int ndt = 8, nave = 3; double fac = 1.0; int db = 0; static double dts[8]; if (waitms == 0) { return waitms; } if (nofb) { return waitms; } if (first) { for(i=0; i 0.0) { /* * inspect recent dt's: * 0 1 2 3 4 5 6 7 dt * ^ ^ ^ */ for (i = ndt - (nave - 1); i < ndt; i++) { bave += dts[i]; bcnt++; if (dts[i] < bogdown_time) { bogdown = 0; break; } } bave += dt; bcnt++; bave = bave / bcnt; if (dt < bogdown_time) { bogdown = 0; } } else { bogdown = 0; } /* shift for next time */ for (i = 0; i < ndt-1; i++) { dts[i] = dts[i+1]; } dts[ndt-1] = dt; if (0 && dt > 0.0) fprintf(stderr, "dt: %.5f %.4f\n", dt, dnow() - x11vnc_start); if (bogdown) { if (use_xdamage) { /* DAMAGE can queue ~1000 rectangles for a scroll */ clear_xdamage_mark_region(NULL, 0); } msec = (int) (1000 * 1.75 * bave); if (dts[ndt - nave - 1] > 0.75 * bave) { msec = 1.5 * msec; set_xdamage_mark(0, 0, dpy_x, dpy_y); } if (msec > 1500) { msec = 1500; } if (msec < waitms) { msec = waitms; } db = (db || debug_tiles); if (db) fprintf(stderr, "bogg[%d] %.3f %.3f %.3f %.3f\n", msec, dts[ndt-4], dts[ndt-3], dts[ndt-2], dts[ndt-1]); return msec; } /* next check for pointer motion, keystrokes, to speed up */ t2 = dnow(); x2 = cursor_x; y2 = cursor_y; dx0 = nabs(x1 - x0); dy0 = nabs(y1 - y0); dx1 = nabs(x2 - x1); dy1 = nabs(y2 - y1); if (dx1 > dy1) { dm = dx1; } else { dm = dy1; } if ((dx0 || dy0) && (dx1 || dy1)) { if (t2 < t0 + cut1 || t2 < t1 + cut2 || dm > 20) { fac = wait_ui * 1.25; } } else if ((dx1 || dy1) && dm > 40) { fac = wait_ui; } if (fac == 1 && t2 < last_keyboard_time + cut3) { fac = wait_ui; } msec = (int) ((double) waitms / fac); if (msec == 0) { msec = 1; } x0 = x1; y0 = y1; t0 = t1; x1 = x2; y1 = y2; t1 = t2; return msec; } /* * main x11vnc loop: polls, checks for events, iterate libvncserver, etc. */ static void watch_loop(void) { int cnt = 0, tile_diffs = 0, skip_pe = 0; double tm, dtr, dt = 0.0; time_t start = time(NULL); if (use_threads) { rfbRunEventLoop(screen, -1, TRUE); } while (1) { got_user_input = 0; got_pointer_input = 0; got_pointer_calls = 0; got_keyboard_input = 0; got_keyboard_calls = 0; urgent_update = 0; if (! use_threads) { dtime0(&tm); if (! skip_pe) { measure_send_rates(1); rfbPE(-1); measure_send_rates(0); fb_update_sent(NULL); } dtr = dtime(&tm); if (! cursor_shape_updates) { /* undo any cursor shape requests */ disable_cursor_shape_updates(screen); } if (screen && screen->clientHead) { int ret = check_user_input(dt, dtr, tile_diffs, &cnt); /* true means loop back for more input */ if (ret == 2) { skip_pe = 1; } if (ret) { if (debug_scroll) fprintf(stderr, "watch_loop: LOOP-BACK: %d\n", ret); continue; } } /* watch for viewonly input piling up: */ if ((got_pointer_calls > got_pointer_input) || (got_keyboard_calls > got_keyboard_input)) { eat_viewonly_input(10, 3); } } else { if (0 && use_xrecord) { /* XXX not working */ check_xrecord(); } if (wireframe && button_mask) { check_wireframe(); } } skip_pe = 0; if (shut_down) { clean_up_exit(0); } if (! urgent_update) { if (do_copy_screen) { do_copy_screen = 0; copy_screen(); } check_new_clients(); check_xevents(0); check_autorepeat(); check_pm(); check_keycode_state(); check_connect_inputs(); check_gui_inputs(); check_stunnel(); check_openssl(); check_https(); record_last_fb_update(); check_padded_fb(); check_fixscreen(); check_xdamage_state(); check_xrecord_reset(0); check_add_keysyms(); check_new_passwds(); if (started_as_root) { check_switched_user(); } if (first_conn_timeout < 0) { start = time(NULL); first_conn_timeout = -first_conn_timeout; } } if (! screen || ! screen->clientHead) { /* waiting for a client */ if (first_conn_timeout) { if (time(NULL) - start > first_conn_timeout) { rfbLog("No client after %d secs.\n", first_conn_timeout); shut_down = 1; } } usleep(200 * 1000); continue; } if (first_conn_timeout && all_clients_initialized()) { first_conn_timeout = 0; } if (nofb) { /* no framebuffer polling needed */ if (cursor_pos_updates) { check_x11_pointer(); } continue; } if (button_mask && (!show_dragging || pointer_mode == 0)) { /* * if any button is pressed do not update rfb * screen, but do flush the X11 display. */ X_LOCK; XFlush_wr(dpy); X_UNLOCK; dt = 0.0; } else { static double last_dt = 0.0; double xdamage_thrash = 0.4; check_cursor_changes(); /* for timing the scan to try to detect thrashing */ if (use_xdamage && last_dt > xdamage_thrash) { clear_xdamage_mark_region(NULL, 0); } dtime0(&tm); if (use_snapfb) { int t, tries = 3; copy_snap(); for (t =0; t < tries; t++) { tile_diffs = scan_for_updates(0); } } else { tile_diffs = scan_for_updates(0); } dt = dtime(&tm); if (! nap_ok) { last_dt = dt; } if ((debug_tiles || debug_scroll > 1 || debug_wireframe > 1) && (tile_diffs > 4 || debug_tiles > 1)) { double rate = (tile_x * tile_y * bpp/8 * tile_diffs) / dt; fprintf(stderr, "============================= TILES: %d dt: %.4f" " t: %.4f %.2f MB/s nap_ok: %d\n", tile_diffs, dt, tm - x11vnc_start, rate/1000000.0, nap_ok); } } /* sleep a bit to lessen load */ if (! urgent_update) { int wait = choose_delay(dt); if (wait > 2*waitms) { /* bog case, break it up */ nap_sleep(wait, 10); } else { usleep(wait * 1000); } } cnt++; } } /* * check blacklist for OSs with tight shm limits. */ static int limit_shm(void) { int limit = 0; if (UT.sysname == NULL) { return 0; } if (!strcmp(UT.sysname, "SunOS")) { char *r = UT.release; if (*r == '5' && *(r+1) == '.') { if (strchr("2345678", *(r+2)) != NULL) { limit = 1; } } } else if (!strcmp(UT.sysname, "Darwin")) { limit = 1; } if (limit && ! quiet) { fprintf(stderr, "reducing shm usage on %s %s (adding " "-onetile)\n", UT.sysname, UT.release); } return limit; } /* * quick-n-dirty ~/.x11vncrc: each line (except # comments) is a cmdline option. */ static int argc2 = 0; static char **argv2; static void check_rcfile(int argc, char **argv) { int i, j, pwlast, norc = 0, argmax = 1024; char *infile = NULL; char rcfile[1024]; FILE *rc = NULL; for (i=1; i < argc; i++) { if (!strcmp(argv[i], "-printgui")) { fprintf(stdout, "%s", get_gui_code()); fflush(stdout); exit(0); } if (!strcmp(argv[i], "-norc")) { norc = 1; got_norc = 1; } if (!strcmp(argv[i], "-QD")) { norc = 1; } if (!strcmp(argv[i], "-rc")) { if (i+1 >= argc) { fprintf(stderr, "-rc option requires a " "filename\n"); exit(1); } else { infile = argv[i+1]; } } } rc_norc = norc; rc_rcfile = strdup(""); if (norc) { ; } else if (infile != NULL) { rc = fopen(infile, "r"); rc_rcfile = strdup(infile); if (rc == NULL) { fprintf(stderr, "could not open rcfile: %s\n", infile); perror("fopen"); exit(1); } } else { char *home = get_home_dir(); if (! home) { norc = 1; } else { strncpy(rcfile, home, 500); free(home); strcat(rcfile, "/.x11vncrc"); infile = rcfile; rc = fopen(rcfile, "r"); if (rc == NULL) { norc = 1; } else { rc_rcfile = strdup(rcfile); rc_rcfile_default = 1; } } } argv2 = (char **) malloc(argmax * sizeof(char *)); argv2[argc2++] = strdup(argv[0]); if (! norc) { char line[4096], parm[100], tmp[101]; char *buf, *tbuf; struct stat sbuf; int sz; if (fstat(fileno(rc), &sbuf) != 0) { fprintf(stderr, "problem with %s\n", infile); perror("fstat"); exit(1); } sz = sbuf.st_size+1; /* allocate whole file size */ if (sz < 1024) { sz = 1024; } buf = (char *) malloc(sz); buf[0] = '\0'; while (fgets(line, 4096, rc) != NULL) { char *q, *p = line; char c; int cont = 0; q = p; c = '\0'; while (*q) { if (*q == '#') { if (c != '\\') { *q = '\0'; break; } } c = *q; q++; } q = p; c = '\0'; while (*q) { if (*q == '\n') { if (c == '\\') { cont = 1; *q = '\0'; *(q-1) = ' '; break; } while (isspace(*q)) { *q = '\0'; if (q == p) { break; } q--; } break; } c = *q; q++; } if (q != p && !cont) { if (*q == '\0') { q--; } while (isspace(*q)) { *q = '\0'; if (q == p) { break; } q--; } } p = lblanks(p); strncat(buf, p, sz - strlen(buf) - 1); if (cont) { continue; } if (buf[0] == '\0') { continue; } i = 0; q = buf; while (*q) { i++; if (*q == '\n' || isspace(*q)) { break; } q++; } if (i >= 100) { fprintf(stderr, "invalid rcfile line: %s/%s\n", p, buf); exit(1); } if (sscanf(buf, "%s", parm) != 1) { fprintf(stderr, "invalid rcfile line: %s\n", p); exit(1); } if (parm[0] == '-') { strncpy(tmp, parm, 100); } else { tmp[0] = '-'; strncpy(tmp+1, parm, 100); } argv2[argc2++] = strdup(tmp); if (argc2 >= argmax) { fprintf(stderr, "too many rcfile options\n"); exit(1); } p = buf; p += strlen(parm); p = lblanks(p); if (*p == '\0') { buf[0] = '\0'; continue; } tbuf = (char *) calloc(strlen(p) + 1, 1); j = 0; while (*p) { if (*p == '\\' && *(p+1) == '#') { ; } else { tbuf[j++] = *p; } p++; } argv2[argc2++] = strdup(tbuf); free(tbuf); if (argc2 >= argmax) { fprintf(stderr, "too many rcfile options\n"); exit(1); } buf[0] = '\0'; } fclose(rc); free(buf); } pwlast = 0; for (i=1; i < argc; i++) { argv2[argc2++] = strdup(argv[i]); if (pwlast || !strcmp("-passwd", argv[i]) || !strcmp("-viewpasswd", argv[i])) { char *p = argv[i]; if (pwlast) { pwlast = 0; } else { pwlast = 1; } strzero(p); } if (argc2 >= argmax) { fprintf(stderr, "too many rcfile options\n"); exit(1); } } } static void immediate_switch_user(int argc, char* argv[]) { int i; for (i=1; i < argc; i++) { char *u; if (strcmp(argv[i], "-users")) { continue; } if (i == argc - 1) { fprintf(stderr, "not enough arguments for: -users\n"); exit(1); } if (*(argv[i+1]) != '=') { break; } /* wants an immediate switch: =bob */ u = strdup(argv[i+1]); *u = '+'; if (strstr(u, "+guess") == u) { fprintf(stderr, "invalid user: %s\n", u+1); exit(1); } if (!switch_user(u, 0)) { fprintf(stderr, "Could not switch to user: %s\n", u+1); exit(1); } else { fprintf(stderr, "Switched to user: %s\n", u+1); started_as_root = 2; } free(u); break; } } static void quick_pw(char *str) { char *p, *q; char tmp[1024]; int db = 0; if (db) fprintf(stderr, "quick_pw: %s\n", str); if (! str || str[0] == '\0') { exit(1); } if (str[0] != '%') { exit(1); } /* * "%-" or "%stdin" means read one line from stdin. * * "%env" means it is in $UNIXPW env var. * * starting "%/" or "%." means read the first line from that file. * * "%%" or "%" means prompt user. * * otherwise: %user:pass */ if (!strcmp(str, "%-") || !strcmp(str, "%stdin")) { if(fgets(tmp, 1024, stdin) == NULL) { exit(1); } q = strdup(tmp); } else if (!strcmp(str, "%env")) { if (getenv("UNIXPW") == NULL) { exit(1); } q = strdup(getenv("UNIXPW")); } else if (!strcmp(str, "%%") || !strcmp(str, "%")) { char *t, inp[1024]; fprintf(stdout, "username: "); if(fgets(tmp, 128, stdin) == NULL) { exit(1); } strcpy(inp, tmp); t = strchr(inp, '\n'); if (t) { *t = ':'; } else { strcat(inp, ":"); } fprintf(stdout, "password: "); /* test mode: no_external_cmds does not apply */ system("stty -echo"); if(fgets(tmp, 128, stdin) == NULL) { fprintf(stdout, "\n"); system("stty echo"); exit(1); } system("stty echo"); fprintf(stdout, "\n"); strcat(inp, tmp); q = strdup(inp); } else if (str[1] == '/' || str[1] == '.') { FILE *in = fopen(str+1, "r"); if (in == NULL) { exit(1); } if(fgets(tmp, 1024, in) == NULL) { exit(1); } q = strdup(tmp); } else { q = strdup(str+1); } p = (char *) malloc(strlen(q) + 10); strcpy(p, q); if (strchr(p, '\n') == NULL) { strcat(p, "\n"); } if ((q = strchr(p, ':')) == NULL) { exit(1); } *q = '\0'; if (db) fprintf(stderr, "'%s' '%s'\n", p, q+1); if (unixpw_nis) { if (crypt_verify(p, q+1)) { fprintf(stdout, "Y %s\n", p); exit(0); } else { fprintf(stdout, "N %s\n", p); exit(1); } } else { if (su_verify(p, q+1, NULL, NULL, NULL)) { fprintf(stdout, "Y %s\n", p); exit(0); } else { fprintf(stdout, "N %s\n", p); exit(1); } } /* NOTREACHED */ exit(1); } static void print_settings(int try_http, int bg, char *gui_str) { fprintf(stderr, "\n"); fprintf(stderr, "Settings:\n"); fprintf(stderr, " display: %s\n", use_dpy ? use_dpy : "null"); #if SMALL_FOOTPRINT < 2 fprintf(stderr, " authfile: %s\n", auth_file ? auth_file : "null"); fprintf(stderr, " subwin: 0x%lx\n", subwin); fprintf(stderr, " -sid mode: %d\n", rootshift); fprintf(stderr, " clip: %s\n", clip_str ? clip_str : "null"); fprintf(stderr, " flashcmap: %d\n", flash_cmap); fprintf(stderr, " shiftcmap: %d\n", shift_cmap); fprintf(stderr, " force_idx: %d\n", force_indexed_color); fprintf(stderr, " cmap8to24: %d\n", cmap8to24); fprintf(stderr, " 8to24_opts: %s\n", cmap8to24_str ? cmap8to24_str : "null"); fprintf(stderr, " 24to32: %d\n", xform24to32); fprintf(stderr, " visual: %s\n", visual_str ? visual_str : "null"); fprintf(stderr, " overlay: %d\n", overlay); fprintf(stderr, " ovl_cursor: %d\n", overlay_cursor); fprintf(stderr, " scaling: %d %.4f\n", scaling, scale_fac); fprintf(stderr, " viewonly: %d\n", view_only); fprintf(stderr, " shared: %d\n", shared); fprintf(stderr, " conn_once: %d\n", connect_once); fprintf(stderr, " timeout: %d\n", first_conn_timeout); fprintf(stderr, " inetd: %d\n", inetd); fprintf(stderr, " filexfer: %d\n", filexfer); fprintf(stderr, " http: %d\n", try_http); fprintf(stderr, " connect: %s\n", client_connect ? client_connect : "null"); fprintf(stderr, " connectfile %s\n", client_connect_file ? client_connect_file : "null"); fprintf(stderr, " vnc_conn: %d\n", vnc_connect); fprintf(stderr, " allow: %s\n", allow_list ? allow_list : "null"); fprintf(stderr, " input: %s\n", allowed_input_str ? allowed_input_str : "null"); fprintf(stderr, " passfile: %s\n", passwdfile ? passwdfile : "null"); fprintf(stderr, " unixpw: %d\n", unixpw); fprintf(stderr, " unixpw_lst: %s\n", unixpw_list ? unixpw_list:"null"); fprintf(stderr, " stunnel: %d\n", use_stunnel); fprintf(stderr, " accept: %s\n", accept_cmd ? accept_cmd : "null"); fprintf(stderr, " accept: %s\n", afteraccept_cmd ? afteraccept_cmd : "null"); fprintf(stderr, " gone: %s\n", gone_cmd ? gone_cmd : "null"); fprintf(stderr, " users: %s\n", users_list ? users_list : "null"); fprintf(stderr, " using_shm: %d\n", using_shm); fprintf(stderr, " flipbytes: %d\n", flip_byte_order); fprintf(stderr, " onetile: %d\n", single_copytile); fprintf(stderr, " solid: %s\n", solid_str ? solid_str : "null"); fprintf(stderr, " blackout: %s\n", blackout_str ? blackout_str : "null"); fprintf(stderr, " xinerama: %d\n", xinerama); fprintf(stderr, " xtrap: %d\n", xtrap_input); fprintf(stderr, " xrandr: %d\n", xrandr); fprintf(stderr, " xrandrmode: %s\n", xrandr_mode ? xrandr_mode : "null"); fprintf(stderr, " padgeom: %s\n", pad_geometry ? pad_geometry : "null"); fprintf(stderr, " logfile: %s\n", logfile ? logfile : "null"); fprintf(stderr, " logappend: %d\n", logfile_append); fprintf(stderr, " flag: %s\n", flagfile ? flagfile : "null"); fprintf(stderr, " rc_file: \"%s\"\n", rc_rcfile ? rc_rcfile : "null"); fprintf(stderr, " norc: %d\n", rc_norc); fprintf(stderr, " dbg: %d\n", crash_debug); fprintf(stderr, " bg: %d\n", bg); fprintf(stderr, " mod_tweak: %d\n", use_modifier_tweak); fprintf(stderr, " isolevel3: %d\n", use_iso_level3); fprintf(stderr, " xkb: %d\n", use_xkb_modtweak); fprintf(stderr, " skipkeys: %s\n", skip_keycodes ? skip_keycodes : "null"); fprintf(stderr, " sloppykeys: %d\n", sloppy_keys); fprintf(stderr, " skip_dups: %d\n", skip_duplicate_key_events); fprintf(stderr, " addkeysyms: %d\n", add_keysyms); fprintf(stderr, " xkbcompat: %d\n", xkbcompat); fprintf(stderr, " clearmods: %d\n", clear_mods); fprintf(stderr, " remap: %s\n", remap_file ? remap_file : "null"); fprintf(stderr, " norepeat: %d\n", no_autorepeat); fprintf(stderr, " norepeatcnt:%d\n", no_repeat_countdown); fprintf(stderr, " nofb: %d\n", nofb); fprintf(stderr, " watchbell: %d\n", watch_bell); fprintf(stderr, " watchsel: %d\n", watch_selection); fprintf(stderr, " watchprim: %d\n", watch_primary); fprintf(stderr, " seldir: %s\n", sel_direction ? sel_direction : "null"); fprintf(stderr, " cursor: %d\n", show_cursor); fprintf(stderr, " multicurs: %d\n", show_multiple_cursors); fprintf(stderr, " curs_mode: %s\n", multiple_cursors_mode ? multiple_cursors_mode : "null"); fprintf(stderr, " arrow: %d\n", alt_arrow); fprintf(stderr, " xfixes: %d\n", use_xfixes); fprintf(stderr, " alphacut: %d\n", alpha_threshold); fprintf(stderr, " alphafrac: %.2f\n", alpha_frac); fprintf(stderr, " alpharemove:%d\n", alpha_remove); fprintf(stderr, " alphablend: %d\n", alpha_blend); fprintf(stderr, " cursorshape:%d\n", cursor_shape_updates); fprintf(stderr, " cursorpos: %d\n", cursor_pos_updates); fprintf(stderr, " xwarpptr: %d\n", use_xwarppointer); fprintf(stderr, " buttonmap: %s\n", pointer_remap ? pointer_remap : "null"); fprintf(stderr, " dragging: %d\n", show_dragging); fprintf(stderr, " wireframe: %s\n", wireframe_str ? wireframe_str : WIREFRAME_PARMS); fprintf(stderr, " wirecopy: %s\n", wireframe_copyrect ? wireframe_copyrect : wireframe_copyrect_default); fprintf(stderr, " scrollcopy: %s\n", scroll_copyrect ? scroll_copyrect : scroll_copyrect_default); fprintf(stderr, " scr_area: %d\n", scrollcopyrect_min_area); fprintf(stderr, " scr_skip: %s\n", scroll_skip_str ? scroll_skip_str : scroll_skip_str0); fprintf(stderr, " scr_inc: %s\n", scroll_good_str ? scroll_good_str : scroll_good_str0); fprintf(stderr, " scr_keys: %s\n", scroll_key_list_str ? scroll_key_list_str : "null"); fprintf(stderr, " scr_term: %s\n", scroll_term_str ? scroll_term_str : "null"); fprintf(stderr, " scr_keyrep: %s\n", max_keyrepeat_str ? max_keyrepeat_str : "null"); fprintf(stderr, " scr_parms: %s\n", scroll_copyrect_str ? scroll_copyrect_str : SCROLL_COPYRECT_PARMS); fprintf(stderr, " fixscreen: %s\n", screen_fixup_str ? screen_fixup_str : "null"); fprintf(stderr, " noxrecord: %d\n", noxrecord); fprintf(stderr, " grabbuster: %d\n", grab_buster); fprintf(stderr, " ptr_mode: %d\n", pointer_mode); fprintf(stderr, " inputskip: %d\n", ui_skip); fprintf(stderr, " speeds: %s\n", speeds_str ? speeds_str : "null"); fprintf(stderr, " wmdt: %s\n", wmdt_str ? wmdt_str : "null"); fprintf(stderr, " debug_ptr: %d\n", debug_pointer); fprintf(stderr, " debug_key: %d\n", debug_keyboard); fprintf(stderr, " defer: %d\n", defer_update); fprintf(stderr, " waitms: %d\n", waitms); fprintf(stderr, " wait_ui: %.2f\n", wait_ui); fprintf(stderr, " nowait_bog: %d\n", !wait_bog); fprintf(stderr, " slow_fb: %.2f\n", slow_fb); fprintf(stderr, " readtimeout: %d\n", rfbMaxClientWait/1000); fprintf(stderr, " take_naps: %d\n", take_naps); fprintf(stderr, " sb: %d\n", screen_blank); fprintf(stderr, " fbpm: %d\n", !watch_fbpm); fprintf(stderr, " xdamage: %d\n", use_xdamage); fprintf(stderr, " xd_area: %d\n", xdamage_max_area); fprintf(stderr, " xd_mem: %.3f\n", xdamage_memory); fprintf(stderr, " sigpipe: %s\n", sigpipe ? sigpipe : "null"); fprintf(stderr, " threads: %d\n", use_threads); fprintf(stderr, " fs_frac: %.2f\n", fs_frac); fprintf(stderr, " gaps_fill: %d\n", gaps_fill); fprintf(stderr, " grow_fill: %d\n", grow_fill); fprintf(stderr, " tile_fuzz: %d\n", tile_fuzz); fprintf(stderr, " snapfb: %d\n", use_snapfb); fprintf(stderr, " rawfb: %s\n", raw_fb_str ? raw_fb_str : "null"); fprintf(stderr, " pipeinput: %s\n", pipeinput_str ? pipeinput_str : "null"); fprintf(stderr, " gui: %d\n", launch_gui); fprintf(stderr, " gui_mode: %s\n", gui_str ? gui_str : "null"); fprintf(stderr, " noremote: %d\n", !accept_remote_cmds); fprintf(stderr, " unsafe: %d\n", !safe_remote_only); fprintf(stderr, " privremote: %d\n", priv_remote); fprintf(stderr, " safer: %d\n", more_safe); fprintf(stderr, " nocmds: %d\n", no_external_cmds); fprintf(stderr, " deny_all: %d\n", deny_all); fprintf(stderr, " pid: %d\n", getpid()); fprintf(stderr, "\n"); #endif rfbLog("x11vnc version: %s\n", lastmod); } static void check_loop_mode(int argc, char* argv[]) { int i; int loop_mode = 0, loop_sleep = 2000, loop_max = 0; for (i=1; i < argc; i++) { char *p = argv[i]; if (strstr(p, "--") == p) { p++; } if (strstr(p, "-loop") == p) { char *q; loop_mode = 1; if ((q = strchr(p, ',')) != NULL) { loop_max = atoi(q+1); *q = '\0'; } q = strpbrk(p, "0123456789"); if (q) { loop_sleep = atoi(q); if (loop_sleep <= 0) { loop_sleep = 10; } } } } if (loop_mode && getenv("X11VNC_LOOP_MODE") == NULL) { #if LIBVNCSERVER_HAVE_FORK char **argv2; int k, i = 1; set_env("X11VNC_LOOP_MODE", "1"); argv2 = (char **) malloc((argc+1)*sizeof(char *)); for (k=0; k < argc+1; k++) { argv2[k] = NULL; if (k < argc) { argv2[k] = argv[k]; } } while (1) { int status; pid_t p; fprintf(stderr, "\n --- x11vnc loop: %d ---\n\n", i++); fflush(stderr); usleep(500 * 1000); if ((p = fork()) > 0) { fprintf(stderr, " --- x11vnc loop: waiting " "for: %d\n\n", p); wait(&status); } else if (p == -1) { fprintf(stderr, "could not fork\n"); perror("fork"); exit(1); } else { /* loop mode: no_external_cmds does not apply */ execvp(argv[0], argv2); exit(1); } if (loop_max > 0 && i > loop_max) { fprintf(stderr, "\n --- x11vnc loop: did %d" " done. ---\n\n", loop_max); break; } fprintf(stderr, "\n --- x11vnc loop: sleeping %d ms " "---\n\n", loop_sleep); usleep(loop_sleep * 1000); } exit(0); #else fprintf(stderr, "fork unavailable, cannot do -loop mode\n"); exit(1); #endif } } static void store_homedir_passwd(char *file) { char str1[32], str2[32], *p, *h, *f; struct stat sbuf; str1[0] = '\0'; str2[0] = '\0'; /* storepasswd */ if (no_external_cmds || !cmd_ok("storepasswd")) { fprintf(stderr, "-nocmds cannot be used with -storepasswd\n"); exit(1); } fprintf(stderr, "Enter VNC password: "); system("stty -echo"); if (fgets(str1, 32, stdin) == NULL) { system("stty echo"); exit(1); } fprintf(stderr, "\n"); fprintf(stderr, "Verify password: "); if (fgets(str2, 32, stdin) == NULL) { system("stty echo"); exit(1); } fprintf(stderr, "\n"); system("stty echo"); if ((p = strchr(str1, '\n')) != NULL) { *p = '\0'; } if ((p = strchr(str2, '\n')) != NULL) { *p = '\0'; } if (strcmp(str1, str2)) { fprintf(stderr, "** passwords differ.\n"); exit(1); } if (str1[0] == '\0') { fprintf(stderr, "** no password supplied.\n"); exit(1); } if (file != NULL) { f = file; } else { h = getenv("HOME"); if (! h) { fprintf(stderr, "** $HOME not set.\n"); exit(1); } f = (char *) malloc(strlen(h) + strlen("/.vnc/passwd") + 1); sprintf(f, "%s/.vnc", h); if (stat(f, &sbuf) != 0) { if (mkdir(f, 0755) != 0) { fprintf(stderr, "** could not create directory %s\n", f); perror("mkdir"); exit(1); } } else if (! S_ISDIR(sbuf.st_mode)) { fprintf(stderr, "** not a directory %s\n", f); exit(1); } sprintf(f, "%s/.vnc/passwd", h); } fprintf(stderr, "Write password to %s? [y]/n ", f); if (fgets(str2, 32, stdin) == NULL) { exit(1); } if (str2[0] == 'n' || str2[0] == 'N') { fprintf(stderr, "not creating password.\n"); exit(1); } if (rfbEncryptAndStorePasswd(str1, f) != 0) { fprintf(stderr, "** error creating password.\n"); perror("storepasswd"); exit(1); } fprintf(stderr, "Password written to: %s\n", f); if (stat(f, &sbuf) != 0) { exit(1); } exit(0); } #define SHOW_NO_PASSWORD_WARNING \ (!got_passwd && !got_rfbauth && (!got_passwdfile || !passwd_list) \ && !query_cmd && !remote_cmd && !unixpw && !got_gui_pw \ && ! ssl_verify && !inetd) int main(int argc, char* argv[]) { int i, len, tmpi; int ev, er, maj, min; char *arg; int remote_sync = 0; char *remote_cmd = NULL; char *query_cmd = NULL; char *gui_str = NULL; int got_gui_pw = 0; int pw_loc = -1, got_passwd = 0, got_rfbauth = 0, nopw = NOPW; int got_viewpasswd = 0, got_localhost = 0, got_passwdfile = 0; int vpw_loc = -1; int dt = 0, bg = 0; int got_rfbwait = 0; int got_httpdir = 0, try_http = 0; int waited_for_client = 0; XImage *fb0 = NULL; /* used to pass args we do not know about to rfbGetScreen(): */ int argc_vnc_max = 1024; int argc_vnc = 1; char *argv_vnc[2048]; /* check for -loop mode: */ check_loop_mode(argc, argv); dtime0(&x11vnc_start); if (!getuid() || !geteuid()) { started_as_root = 1; /* check for '-users =bob' */ immediate_switch_user(argc, argv); } for (i=0; i < 2048; i++) { argv_vnc[i] = NULL; } argv_vnc[0] = strdup(argv[0]); program_name = strdup(argv[0]); program_pid = (int) getpid(); solid_default = strdup(solid_default); /* for freeing with -R */ len = 0; for (i=1; i < argc; i++) { len += strlen(argv[i]) + 4 + 1; } program_cmdline = (char *) malloc(len+1); program_cmdline[0] = '\0'; for (i=1; i < argc; i++) { char *s = argv[i]; if (program_cmdline[0]) { strcat(program_cmdline, " "); } if (*s == '-') { strcat(program_cmdline, s); } else { strcat(program_cmdline, "{{"); strcat(program_cmdline, s); strcat(program_cmdline, "}}"); } } for (i=0; i= argc-1) { \ fprintf(stderr, "not enough arguments for: %s\n", arg); \ exit(1); \ } /* * do a quick check for parameters that apply to "utility" * commands, i.e. ones that do not run the server. */ for (i=1; i < argc; i++) { arg = argv[i]; if (strstr(arg, "--") == arg) { arg++; } if (!strcmp(arg, "-ssldir")) { CHECK_ARGC ssl_certs_dir = strdup(argv[++i]); } } /* * do a quick check for -env parameters */ for (i=1; i < argc; i++) { char *p, *q; arg = argv[i]; if (strstr(arg, "--") == arg) { arg++; } if (!strcmp(arg, "-env")) { CHECK_ARGC p = strdup(argv[++i]); q = strchr(p, '='); if (! q) { fprintf(stderr, "no -env '=' found: %s\n", p); exit(1); } else { *q = '\0'; } set_env(p, q+1); free(p); } } for (i=1; i < argc; i++) { /* quick-n-dirty --option handling. */ arg = argv[i]; if (strstr(arg, "--") == arg) { arg++; } if (!strcmp(arg, "-display")) { CHECK_ARGC use_dpy = strdup(argv[++i]); if (strstr(use_dpy, "WAIT")) { extern char find_display[]; if (strstr(use_dpy, "cmd=FINDDISPLAY-print")) { fprintf(stdout, "%s", find_display); exit(0); } } } else if (!strcmp(arg, "-auth") || !strcmp(arg, "-xauth")) { CHECK_ARGC auth_file = strdup(argv[++i]); } else if (!strcmp(arg, "-id") || !strcmp(arg, "-sid")) { CHECK_ARGC if (!strcmp(arg, "-sid")) { rootshift = 1; } else { rootshift = 0; } i++; if (!strcmp("pick", argv[i])) { if (started_as_root) { fprintf(stderr, "unsafe: %s pick\n", arg); exit(1); } else if (! pick_windowid(&subwin)) { fprintf(stderr, "invalid %s pick\n", arg); exit(1); } } else if (! scan_hexdec(argv[i], &subwin)) { fprintf(stderr, "invalid %s arg: %s\n", arg, argv[i]); exit(1); } } else if (!strcmp(arg, "-waitmapped")) { subwin_wait_mapped = 1; } else if (!strcmp(arg, "-clip")) { CHECK_ARGC clip_str = strdup(argv[++i]); } else if (!strcmp(arg, "-flashcmap")) { flash_cmap = 1; } else if (!strcmp(arg, "-shiftcmap")) { CHECK_ARGC shift_cmap = atoi(argv[++i]); } else if (!strcmp(arg, "-notruecolor")) { force_indexed_color = 1; } else if (!strcmp(arg, "-overlay")) { overlay = 1; } else if (!strcmp(arg, "-overlay_nocursor")) { overlay = 1; overlay_cursor = 0; } else if (!strcmp(arg, "-overlay_yescursor")) { overlay = 1; overlay_cursor = 2; #if !SKIP_8TO24 } else if (!strcmp(arg, "-8to24")) { cmap8to24 = 1; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { cmap8to24_str = strdup(s); i++; } } #endif } else if (!strcmp(arg, "-24to32")) { xform24to32 = 1; } else if (!strcmp(arg, "-visual")) { CHECK_ARGC visual_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scale")) { CHECK_ARGC scale_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scale_cursor")) { CHECK_ARGC scale_cursor_str = strdup(argv[++i]); } else if (!strcmp(arg, "-viewonly")) { view_only = 1; } else if (!strcmp(arg, "-noviewonly")) { view_only = 0; got_noviewonly = 1; } else if (!strcmp(arg, "-shared")) { shared = 1; } else if (!strcmp(arg, "-once")) { connect_once = 1; got_connect_once = 1; } else if (!strcmp(arg, "-many") || !strcmp(arg, "-forever")) { connect_once = 0; } else if (strstr(arg, "-loop") == arg) { ; /* handled above */ } else if (!strcmp(arg, "-timeout")) { CHECK_ARGC first_conn_timeout = atoi(argv[++i]); } else if (!strcmp(arg, "-users")) { CHECK_ARGC users_list = strdup(argv[++i]); } else if (!strcmp(arg, "-inetd")) { inetd = 1; } else if (!strcmp(arg, "-nofilexfer")) { filexfer = 0; } else if (!strcmp(arg, "-filexfer")) { filexfer = 1; } else if (!strcmp(arg, "-http")) { try_http = 1; } else if (!strcmp(arg, "-http_ssl")) { try_http = 1; http_ssl = 1; } else if (!strcmp(arg, "-connect")) { CHECK_ARGC if (strchr(argv[++i], '/')) { client_connect_file = strdup(argv[i]); } else { client_connect = strdup(argv[i]); } } else if (!strcmp(arg, "-vncconnect")) { vnc_connect = 1; } else if (!strcmp(arg, "-novncconnect")) { vnc_connect = 0; } else if (!strcmp(arg, "-allow")) { CHECK_ARGC allow_list = strdup(argv[++i]); } else if (!strcmp(arg, "-localhost")) { allow_list = strdup("127.0.0.1"); got_localhost = 1; } else if (!strcmp(arg, "-nolookup")) { host_lookup = 0; } else if (!strcmp(arg, "-input")) { CHECK_ARGC allowed_input_str = strdup(argv[++i]); } else if (!strcmp(arg, "-grabkbd")) { grab_kbd = 1; } else if (!strcmp(arg, "-grabptr")) { grab_ptr = 1; } else if (!strcmp(arg, "-viewpasswd")) { vpw_loc = i; CHECK_ARGC viewonly_passwd = strdup(argv[++i]); got_viewpasswd = 1; } else if (!strcmp(arg, "-passwdfile")) { CHECK_ARGC passwdfile = strdup(argv[++i]); got_passwdfile = 1; #ifndef REL81 } else if (strstr(arg, "-unixpw") == arg) { unixpw = 1; if (strstr(arg, "-unixpw_nis")) { unixpw_nis = 1; } if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { unixpw_list = strdup(s); i++; } if (s[0] == '%') { unixpw_list = NULL; quick_pw(s); exit(1); } } if (strstr(arg, "_unsafe")) { /* hidden option for testing. */ set_env("UNIXPW_DISABLE_SSL", "1"); set_env("UNIXPW_DISABLE_LOCALHOST", "1"); } } else if (!strcmp(arg, "-ssl")) { use_openssl = 1; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { openssl_pem = strdup(s); i++; } } } else if (!strcmp(arg, "-ssldir")) { CHECK_ARGC ssl_certs_dir = strdup(argv[++i]); } else if (!strcmp(arg, "-sslverify")) { CHECK_ARGC ssl_verify = strdup(argv[++i]); } else if (!strcmp(arg, "-sslGenCA")) { char *cdir = NULL; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { cdir = strdup(s); i++; } } sslGenCA(cdir); exit(0); } else if (!strcmp(arg, "-sslGenCert")) { char *ty, *nm = NULL; if (i >= argc-1) { fprintf(stderr, "Must be:\n"); fprintf(stderr, " x11vnc -sslGenCert server ...\n"); fprintf(stderr, "or x11vnc -sslGenCert client ...\n"); exit(1); } ty = argv[i+1]; if (strcmp(ty, "server") && strcmp(ty, "client")) { fprintf(stderr, "Must be:\n"); fprintf(stderr, " x11vnc -sslGenCert server ...\n"); fprintf(stderr, "or x11vnc -sslGenCert client ...\n"); exit(1); } if (i < argc-2) { nm = argv[i+2]; } sslGenCert(ty, nm); exit(0); } else if (!strcmp(arg, "-sslEncKey")) { if (i < argc-1) { char *s = argv[i+1]; sslEncKey(s, 0); } exit(0); } else if (!strcmp(arg, "-sslCertInfo")) { if (i < argc-1) { char *s = argv[i+1]; sslEncKey(s, 1); } exit(0); } else if (!strcmp(arg, "-sslDelCert")) { if (i < argc-1) { char *s = argv[i+1]; sslEncKey(s, 2); } exit(0); } else if (!strcmp(arg, "-stunnel")) { use_stunnel = 1; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { stunnel_pem = strdup(s); i++; } } } else if (!strcmp(arg, "-stunnel3")) { use_stunnel = 3; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { stunnel_pem = strdup(s); i++; } } } else if (!strcmp(arg, "-https")) { https_port_num = 0; try_http = 1; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { https_port_num = atoi(s); i++; } } #endif } else if (!strcmp(arg, "-nopw")) { nopw = 1; } else if (!strcmp(arg, "-usepw")) { usepw = 1; } else if (!strcmp(arg, "-storepasswd")) { if (argc == i+1) { store_homedir_passwd(NULL); exit(0); } if (argc == i+2) { store_homedir_passwd(argv[i+1]); exit(0); } if (argc >= i+4 || rfbEncryptAndStorePasswd(argv[i+1], argv[i+2]) != 0) { fprintf(stderr, "-storepasswd failed\n"); exit(1); } else { fprintf(stderr, "stored passwd in file %s\n", argv[i+2]); exit(0); } } else if (!strcmp(arg, "-accept")) { CHECK_ARGC accept_cmd = strdup(argv[++i]); } else if (!strcmp(arg, "-afteraccept")) { CHECK_ARGC afteraccept_cmd = strdup(argv[++i]); } else if (!strcmp(arg, "-gone")) { CHECK_ARGC gone_cmd = strdup(argv[++i]); } else if (!strcmp(arg, "-noshm")) { using_shm = 0; } else if (!strcmp(arg, "-flipbyteorder")) { flip_byte_order = 1; } else if (!strcmp(arg, "-onetile")) { single_copytile = 1; } else if (!strcmp(arg, "-solid")) { use_solid_bg = 1; if (i < argc-1) { char *s = argv[i+1]; if (s[0] != '-') { solid_str = strdup(s); i++; } } if (! solid_str) { solid_str = strdup(solid_default); } } else if (!strcmp(arg, "-blackout")) { CHECK_ARGC blackout_str = strdup(argv[++i]); } else if (!strcmp(arg, "-xinerama")) { xinerama = 1; } else if (!strcmp(arg, "-xtrap")) { xtrap_input = 1; } else if (!strcmp(arg, "-xrandr")) { xrandr = 1; if (i < argc-1) { char *s = argv[i+1]; if (known_xrandr_mode(s)) { xrandr_mode = strdup(s); i++; } } } else if (!strcmp(arg, "-padgeom") || !strcmp(arg, "-padgeometry")) { CHECK_ARGC pad_geometry = strdup(argv[++i]); } else if (!strcmp(arg, "-o") || !strcmp(arg, "-logfile")) { CHECK_ARGC logfile_append = 0; logfile = strdup(argv[++i]); } else if (!strcmp(arg, "-oa") || !strcmp(arg, "-logappend")) { CHECK_ARGC logfile_append = 1; logfile = strdup(argv[++i]); } else if (!strcmp(arg, "-flag")) { CHECK_ARGC flagfile = strdup(argv[++i]); } else if (!strcmp(arg, "-rc")) { i++; /* done above */ } else if (!strcmp(arg, "-norc")) { ; /* done above */ } else if (!strcmp(arg, "-env")) { i++; /* done above */ } else if (!strcmp(arg, "-h") || !strcmp(arg, "-help")) { print_help(0); } else if (!strcmp(arg, "-?") || !strcmp(arg, "-opts")) { print_help(1); } else if (!strcmp(arg, "-V") || !strcmp(arg, "-version")) { fprintf(stdout, "x11vnc: %s\n", lastmod); exit(0); } else if (!strcmp(arg, "-dbg")) { crash_debug = 1; } else if (!strcmp(arg, "-nodbg")) { crash_debug = 0; } else if (!strcmp(arg, "-q") || !strcmp(arg, "-quiet")) { quiet = 1; } else if (!strcmp(arg, "-bg") || !strcmp(arg, "-background")) { #if LIBVNCSERVER_HAVE_SETSID bg = 1; opts_bg = bg; #else fprintf(stderr, "warning: -bg mode not supported.\n"); #endif } else if (!strcmp(arg, "-modtweak")) { use_modifier_tweak = 1; } else if (!strcmp(arg, "-nomodtweak")) { use_modifier_tweak = 0; got_nomodtweak = 1; } else if (!strcmp(arg, "-isolevel3")) { use_iso_level3 = 1; } else if (!strcmp(arg, "-xkb")) { use_modifier_tweak = 1; use_xkb_modtweak = 1; } else if (!strcmp(arg, "-noxkb")) { use_xkb_modtweak = 0; got_noxkb = 1; } else if (!strcmp(arg, "-capslock")) { watch_capslock = 1; } else if (!strcmp(arg, "-skip_lockkeys")) { skip_lockkeys = 1; } else if (!strcmp(arg, "-xkbcompat")) { xkbcompat = 1; } else if (!strcmp(arg, "-skip_keycodes")) { CHECK_ARGC skip_keycodes = strdup(argv[++i]); } else if (!strcmp(arg, "-sloppy_keys")) { sloppy_keys++; } else if (!strcmp(arg, "-skip_dups")) { skip_duplicate_key_events = 1; } else if (!strcmp(arg, "-noskip_dups")) { skip_duplicate_key_events = 0; } else if (!strcmp(arg, "-add_keysyms")) { add_keysyms++; } else if (!strcmp(arg, "-noadd_keysyms")) { add_keysyms = 0; } else if (!strcmp(arg, "-clear_mods")) { clear_mods = 1; } else if (!strcmp(arg, "-clear_keys")) { clear_mods = 2; } else if (!strcmp(arg, "-remap")) { CHECK_ARGC remap_file = strdup(argv[++i]); } else if (!strcmp(arg, "-norepeat")) { no_autorepeat = 1; if (i < argc-1) { char *s = argv[i+1]; if (*s == '-') { s++; } if (isdigit(*s)) { no_repeat_countdown = atoi(argv[++i]); } } } else if (!strcmp(arg, "-repeat")) { no_autorepeat = 0; } else if (!strcmp(arg, "-nofb")) { nofb = 1; } else if (!strcmp(arg, "-nobell")) { watch_bell = 0; sound_bell = 0; } else if (!strcmp(arg, "-nosel")) { watch_selection = 0; watch_primary = 0; watch_clipboard = 0; } else if (!strcmp(arg, "-noprimary")) { watch_primary = 0; } else if (!strcmp(arg, "-nosetprimary")) { set_primary = 0; } else if (!strcmp(arg, "-noclipboard")) { watch_clipboard = 0; } else if (!strcmp(arg, "-nosetclipboard")) { set_clipboard = 0; } else if (!strcmp(arg, "-seldir")) { CHECK_ARGC sel_direction = strdup(argv[++i]); } else if (!strcmp(arg, "-cursor")) { show_cursor = 1; if (i < argc-1) { char *s = argv[i+1]; if (known_cursors_mode(s)) { multiple_cursors_mode = strdup(s); i++; if (!strcmp(s, "none")) { show_cursor = 0; } } } } else if (!strcmp(arg, "-nocursor")) { multiple_cursors_mode = strdup("none"); show_cursor = 0; } else if (!strcmp(arg, "-arrow")) { CHECK_ARGC alt_arrow = atoi(argv[++i]); } else if (!strcmp(arg, "-xfixes")) { use_xfixes = 1; } else if (!strcmp(arg, "-noxfixes")) { use_xfixes = 0; } else if (!strcmp(arg, "-alphacut")) { CHECK_ARGC alpha_threshold = atoi(argv[++i]); } else if (!strcmp(arg, "-alphafrac")) { CHECK_ARGC alpha_frac = atof(argv[++i]); } else if (!strcmp(arg, "-alpharemove")) { alpha_remove = 1; } else if (!strcmp(arg, "-noalphablend")) { alpha_blend = 0; } else if (!strcmp(arg, "-nocursorshape")) { cursor_shape_updates = 0; } else if (!strcmp(arg, "-cursorpos")) { cursor_pos_updates = 1; got_cursorpos = 1; } else if (!strcmp(arg, "-nocursorpos")) { cursor_pos_updates = 0; } else if (!strcmp(arg, "-xwarppointer")) { use_xwarppointer = 1; } else if (!strcmp(arg, "-buttonmap")) { CHECK_ARGC pointer_remap = strdup(argv[++i]); } else if (!strcmp(arg, "-nodragging")) { show_dragging = 0; } else if (!strcmp(arg, "-wireframe") || !strcmp(arg, "-wf")) { wireframe = 1; if (i < argc-1) { char *s = argv[i+1]; if (*s != '-') { wireframe_str = strdup(argv[++i]); } } } else if (!strcmp(arg, "-nowireframe") || !strcmp(arg, "-nowf")) { wireframe = 0; } else if (!strcmp(arg, "-wirecopyrect") || !strcmp(arg, "-wcr")) { CHECK_ARGC set_wirecopyrect_mode(argv[++i]); got_wirecopyrect = 1; } else if (!strcmp(arg, "-nowirecopyrect") || !strcmp(arg, "-nowcr")) { set_wirecopyrect_mode("never"); } else if (!strcmp(arg, "-debug_wireframe") || !strcmp(arg, "-dwf")) { debug_wireframe++; } else if (!strcmp(arg, "-scrollcopyrect") || !strcmp(arg, "-scr")) { CHECK_ARGC set_scrollcopyrect_mode(argv[++i]); got_scrollcopyrect = 1; } else if (!strcmp(arg, "-noscrollcopyrect") || !strcmp(arg, "-noscr")) { set_scrollcopyrect_mode("never"); } else if (!strcmp(arg, "-scr_area")) { int tn; CHECK_ARGC tn = atoi(argv[++i]); if (tn >= 0) { scrollcopyrect_min_area = tn; } } else if (!strcmp(arg, "-scr_skip")) { CHECK_ARGC scroll_skip_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scr_inc")) { CHECK_ARGC scroll_good_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scr_keys")) { CHECK_ARGC scroll_key_list_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scr_term")) { CHECK_ARGC scroll_term_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scr_keyrepeat")) { CHECK_ARGC max_keyrepeat_str = strdup(argv[++i]); } else if (!strcmp(arg, "-scr_parms")) { CHECK_ARGC scroll_copyrect_str = strdup(argv[++i]); } else if (!strcmp(arg, "-fixscreen")) { CHECK_ARGC screen_fixup_str = strdup(argv[++i]); } else if (!strcmp(arg, "-debug_scroll") || !strcmp(arg, "-ds")) { debug_scroll++; } else if (!strcmp(arg, "-noxrecord")) { noxrecord = 1; } else if (!strcmp(arg, "-pointer_mode") || !strcmp(arg, "-pm")) { char *p, *s; CHECK_ARGC s = argv[++i]; if ((p = strchr(s, ':')) != NULL) { ui_skip = atoi(p+1); if (! ui_skip) ui_skip = 1; *p = '\0'; } if (atoi(s) < 1 || atoi(s) > pointer_mode_max) { rfbLog("pointer_mode out of range 1-%d: %d\n", pointer_mode_max, atoi(s)); } else { pointer_mode = atoi(s); got_pointer_mode = pointer_mode; } } else if (!strcmp(arg, "-input_skip")) { CHECK_ARGC ui_skip = atoi(argv[++i]); if (! ui_skip) ui_skip = 1; } else if (!strcmp(arg, "-speeds")) { CHECK_ARGC speeds_str = strdup(argv[++i]); } else if (!strcmp(arg, "-wmdt")) { CHECK_ARGC wmdt_str = strdup(argv[++i]); } else if (!strcmp(arg, "-debug_pointer") || !strcmp(arg, "-dp")) { debug_pointer++; } else if (!strcmp(arg, "-debug_keyboard") || !strcmp(arg, "-dk")) { debug_keyboard++; } else if (!strcmp(arg, "-defer")) { CHECK_ARGC defer_update = atoi(argv[++i]); got_defer = 1; } else if (!strcmp(arg, "-wait")) { CHECK_ARGC waitms = atoi(argv[++i]); } else if (!strcmp(arg, "-wait_ui")) { CHECK_ARGC wait_ui = atof(argv[++i]); } else if (!strcmp(arg, "-nowait_bog")) { wait_bog = 0; } else if (!strcmp(arg, "-slow_fb")) { CHECK_ARGC slow_fb = atof(argv[++i]); } else if (!strcmp(arg, "-readtimeout")) { CHECK_ARGC rfbMaxClientWait = atoi(argv[++i]) * 1000; } else if (!strcmp(arg, "-nap")) { take_naps = 1; } else if (!strcmp(arg, "-nonap")) { take_naps = 0; } else if (!strcmp(arg, "-sb")) { CHECK_ARGC screen_blank = atoi(argv[++i]); } else if (!strcmp(arg, "-nofbpm")) { watch_fbpm = 1; } else if (!strcmp(arg, "-fbpm")) { watch_fbpm = 0; } else if (!strcmp(arg, "-xdamage")) { use_xdamage = 1; } else if (!strcmp(arg, "-noxdamage")) { use_xdamage = 0; } else if (!strcmp(arg, "-xd_area")) { int tn; CHECK_ARGC tn = atoi(argv[++i]); if (tn >= 0) { xdamage_max_area = tn; } } else if (!strcmp(arg, "-xd_mem")) { double f; CHECK_ARGC f = atof(argv[++i]); if (f >= 0.0) { xdamage_memory = f; } } else if (!strcmp(arg, "-sigpipe")) { CHECK_ARGC if (known_sigpipe_mode(argv[++i])) { sigpipe = strdup(argv[i]); } else { fprintf(stderr, "invalid -sigpipe arg: %s, must" " be \"ignore\" or \"exit\"\n", argv[i]); exit(1); } #if LIBVNCSERVER_HAVE_LIBPTHREAD } else if (!strcmp(arg, "-threads")) { use_threads = 1; } else if (!strcmp(arg, "-nothreads")) { use_threads = 0; #endif } else if (!strcmp(arg, "-fs")) { CHECK_ARGC fs_frac = atof(argv[++i]); } else if (!strcmp(arg, "-gaps")) { CHECK_ARGC gaps_fill = atoi(argv[++i]); } else if (!strcmp(arg, "-grow")) { CHECK_ARGC grow_fill = atoi(argv[++i]); } else if (!strcmp(arg, "-fuzz")) { CHECK_ARGC tile_fuzz = atoi(argv[++i]); } else if (!strcmp(arg, "-debug_tiles") || !strcmp(arg, "-dbt")) { debug_tiles++; } else if (!strcmp(arg, "-debug_grabs")) { debug_grabs++; } else if (!strcmp(arg, "-debug_sel")) { debug_sel++; } else if (!strcmp(arg, "-grab_buster")) { grab_buster++; } else if (!strcmp(arg, "-nograb_buster")) { grab_buster = 0; } else if (!strcmp(arg, "-snapfb")) { use_snapfb = 1; } else if (!strcmp(arg, "-rawfb")) { CHECK_ARGC raw_fb_str = strdup(argv[++i]); } else if (!strcmp(arg, "-freqtab")) { CHECK_ARGC freqtab = strdup(argv[++i]); } else if (!strcmp(arg, "-pipeinput")) { CHECK_ARGC pipeinput_str = strdup(argv[++i]); } else if (!strcmp(arg, "-gui")) { launch_gui = 1; if (i < argc-1) { char *s = argv[i+1]; if (*s != '-') { gui_str = strdup(s); if (strstr(gui_str, "setp")) { got_gui_pw = 1; } i++; } } } else if (!strcmp(arg, "-remote") || !strcmp(arg, "-R") || !strcmp(arg, "-r") || !strcmp(arg, "-remote-control")) { char *str; CHECK_ARGC i++; str = argv[i]; if (*str == '-') { /* accidental leading '-' */ str++; } if (!strcmp(str, "ping")) { query_cmd = strdup(str); } else { remote_cmd = strdup(str); } if (remote_cmd && strchr(remote_cmd, ':') == NULL) { /* interpret -R -scale 3/4 at least */ if (i < argc-1 && *(argv[i+1]) != '-') { int n; /* it must be the parameter value */ i++; n = strlen(remote_cmd) + strlen(argv[i]) + 2; str = (char *) malloc(n); sprintf(str, "%s:%s", remote_cmd, argv[i]); free(remote_cmd); remote_cmd = str; } } quiet = 1; xkbcompat = 0; } else if (!strcmp(arg, "-query") || !strcmp(arg, "-Q")) { CHECK_ARGC query_cmd = strdup(argv[++i]); quiet = 1; xkbcompat = 0; } else if (!strcmp(arg, "-QD")) { CHECK_ARGC query_cmd = strdup(argv[++i]); query_default = 1; } else if (!strcmp(arg, "-sync")) { remote_sync = 1; } else if (!strcmp(arg, "-nosync")) { remote_sync = 0; } else if (!strcmp(arg, "-noremote")) { accept_remote_cmds = 0; } else if (!strcmp(arg, "-yesremote")) { accept_remote_cmds = 1; } else if (!strcmp(arg, "-unsafe")) { safe_remote_only = 0; } else if (!strcmp(arg, "-privremote")) { priv_remote = 1; } else if (!strcmp(arg, "-safer")) { more_safe = 1; } else if (!strcmp(arg, "-nocmds")) { no_external_cmds = 1; } else if (!strcmp(arg, "-allowedcmds")) { CHECK_ARGC allowed_external_cmds = strdup(argv[++i]); } else if (!strcmp(arg, "-deny_all")) { deny_all = 1; } else if (!strcmp(arg, "-httpdir")) { CHECK_ARGC http_dir = strdup(argv[++i]); got_httpdir = 1; } else { if (!strcmp(arg, "-desktop") && i < argc-1) { dt = 1; rfb_desktop_name = strdup(argv[i+1]); } if (!strcmp(arg, "-passwd")) { pw_loc = i; got_passwd = 1; } if (!strcmp(arg, "-rfbauth")) { got_rfbauth = 1; } if (!strcmp(arg, "-rfbwait")) { got_rfbwait = 1; } if (!strcmp(arg, "-deferupdate")) { got_deferupdate = 1; } if (!strcmp(arg, "-rfbport") && i < argc-1) { got_rfbport = atoi(argv[i+1]); } if (!strcmp(arg, "-alwaysshared ")) { got_alwaysshared = 1; } if (!strcmp(arg, "-nevershared")) { got_nevershared = 1; } if (!strcmp(arg, "-listen") && i < argc-1) { listen_str = strdup(argv[i+1]); } /* otherwise copy it for libvncserver use below. */ if (argc_vnc < argc_vnc_max) { argv_vnc[argc_vnc++] = strdup(arg); } else { rfbLog("too many arguments.\n"); exit(1); } } } if (getenv("X11VNC_LOOP_MODE")) { if (bg) { if (! quiet) { fprintf(stderr, "disabling -bg in -loop " "mode\n"); } bg = 0; } if (inetd) { if (! quiet) { fprintf(stderr, "disabling -inetd in -loop " "mode\n"); } inetd = 0; } } if (launch_gui && (query_cmd || remote_cmd)) { launch_gui = 0; gui_str = NULL; } if (more_safe) { launch_gui = 0; } if (launch_gui) { int sleep = 0; if (SHOW_NO_PASSWORD_WARNING && !nopw) { sleep = 2; } do_gui(gui_str, sleep); } if (logfile) { int n; if (logfile_append) { n = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0666); } else { n = open(logfile, O_WRONLY|O_CREAT|O_TRUNC, 0666); } if (n < 0) { fprintf(stderr, "error opening logfile: %s\n", logfile); perror("open"); exit(1); } if (dup2(n, 2) < 0) { fprintf(stderr, "dup2 failed\n"); perror("dup2"); exit(1); } if (n > 2) { close(n); } } if (inetd && quiet && !logfile) { int n; /* * Redir stderr to /dev/null under -inetd and -quiet * but no -o logfile. Typical problem: * Xlib: extension "RECORD" missing on display ":1.0". * If they want this info, they should use -o logfile, * or no -q and 2>logfile. */ n = open("/dev/null", O_WRONLY); if (n >= 0) { if (dup2(n, 2) >= 0) { if (n > 2) { close(n); } } } } if (! quiet && ! inetd) { int i; for (i=1; i < argc_vnc; i++) { rfbLog("passing arg to libvncserver: %s\n", argv_vnc[i]); if (!strcmp(argv_vnc[i], "-passwd")) { i++; } } } if (remote_cmd || query_cmd) { /* * no need to open DISPLAY, just write it to the file now * similar for query_default. */ if (client_connect_file || query_default) { int rc = do_remote_query(remote_cmd, query_cmd, remote_sync, query_default); fflush(stderr); fflush(stdout); exit(rc); } } if (usepw && ! got_rfbauth && ! got_passwd && ! got_passwdfile && !unixpw) { char *f, *h = getenv("HOME"); struct stat sbuf; int found = 0, set_rfbauth = 0; if (!h) { rfbLog("HOME unset in -usepw mode.\n"); exit(1); } f = (char *) malloc(strlen(h)+strlen("/.vnc/passwdfile") + 1); sprintf(f, "%s/.vnc/passwd", h); if (stat(f, &sbuf) == 0) { found = 1; if (! quiet) { rfbLog("-usepw: found %s\n", f); } got_rfbauth = 1; set_rfbauth = 1; } sprintf(f, "%s/.vnc/passwdfile", h); if (! found && stat(f, &sbuf) == 0) { found = 1; if (! quiet) { rfbLog("-usepw: found %s\n", f); } got_passwdfile = 1; passwdfile = strdup(f); } #if LIBVNCSERVER_HAVE_FORK #if LIBVNCSERVER_HAVE_SYS_WAIT_H #if LIBVNCSERVER_HAVE_WAITPID if (! found) { pid_t pid = fork(); if (pid < 0) { ; } else if (pid == 0) { execlp(argv[0], argv[0], "-storepasswd", (char *) NULL); exit(1); } else { int s; waitpid(pid, &s, 0); if (WIFEXITED(s) && WEXITSTATUS(s) == 0) { got_rfbauth = 1; set_rfbauth = 1; found = 1; } } } #endif #endif #endif if (set_rfbauth) { sprintf(f, "%s/.vnc/passwd", h); if (argc_vnc < 100) { argv_vnc[argc_vnc++] = strdup("-rfbauth"); } else { exit(1); } if (argc_vnc < 100) { argv_vnc[argc_vnc++] = strdup(f); } else { exit(1); } } if (! found) { fprintf(stderr, "x11vnc -usepw: could not find" " a password to use.\n"); exit(1); } free(f); } if (got_rfbauth && (got_passwd || got_viewpasswd || got_passwdfile)) { fprintf(stderr, "option -rfbauth is incompatible with:\n"); fprintf(stderr, " -passwd, -viewpasswd, and -passwdfile\n"); exit(1); } if (got_passwdfile && (got_passwd || got_viewpasswd)) { fprintf(stderr, "option -passwdfile is incompatible with:\n"); fprintf(stderr, " -passwd and -viewpasswd\n"); exit(1); } /* * If -passwd was used, clear it out of argv. This does not * work on all UNIX, have to use execvp() in general... */ if (pw_loc > 0) { int i; for (i=pw_loc; i <= pw_loc+1; i++) { if (i < argc) { char *p = argv[i]; strzero(p); } } } else if (passwdfile) { /* read passwd(s) from file */ if (read_passwds(passwdfile)) { argv_vnc[argc_vnc++] = strdup("-passwd"); argv_vnc[argc_vnc++] = strdup(passwd_list[0]); got_passwd = 1; pw_loc = 100; /* just for pw_loc check below */ } } if (vpw_loc > 0) { int i; for (i=vpw_loc; i <= vpw_loc+1; i++) { if (i < argc) { char *p = argv[i]; strzero(p); } } } #ifdef HARDWIRE_PASSWD if (!got_rfbauth && !got_passwd) { argv_vnc[argc_vnc++] = strdup("-passwd"); argv_vnc[argc_vnc++] = strdup(HARDWIRE_PASSWD); got_passwd = 1; pw_loc = 100; } #endif #ifdef HARDWIRE_VIEWPASSWD if (!got_rfbauth && got_passwd && !viewonly_passwd && !passwd_list) { viewonly_passwd = strdup(HARDWIRE_VIEWPASSWD); } #endif if (viewonly_passwd && pw_loc < 0) { rfbLog("-passwd must be supplied when using -viewpasswd\n"); exit(1); } if (SHOW_NO_PASSWORD_WARNING) { char message[] = "-rfbauth, -passwdfile, -passwd password, " "or -unixpw required."; if (! nopw) { nopassword_warning_msg(got_localhost); } #if PASSWD_REQUIRED rfbLog("%s\n", message); exit(1); #endif #if PASSWD_UNLESS_NOPW if (! nopw) { rfbLog("%s\n", message); exit(1); } #endif message[0] = '\0'; /* avoid compiler warning */ } if (more_safe) { if (! quiet) { rfbLog("-safer mode:\n"); rfbLog(" vnc_connect=0\n"); rfbLog(" accept_remote_cmds=0\n"); rfbLog(" safe_remote_only=1\n"); rfbLog(" launch_gui=0\n"); } vnc_connect = 0; accept_remote_cmds = 0; safe_remote_only = 1; launch_gui = 0; } if (unixpw) { if (inetd) { use_stunnel = 0; } if (! use_stunnel && ! use_openssl) { if (have_ssh_env()) { char *s = getenv("SSH_CONNECTION"); if (! s) s = getenv("SSH_CLIENT"); if (! s) s = "SSH_CONNECTION"; fprintf(stderr, "\n"); rfbLog("Skipping -ssl/-stunnel contraint in" " -unixpw\n"); rfbLog("mode, assuming your SSH encryption" " is: %s\n", s); rfbLog("Setting -localhost in SSH + -unixpw" " mode.\n"); fprintf(stderr, "\n"); allow_list = strdup("127.0.0.1"); got_localhost = 1; if (! nopw) { usleep(2000*1000); } } else if (getenv("UNIXPW_DISABLE_SSL")) { rfbLog("Skipping -ssl/-stunnel requirement" " due to\n"); rfbLog("UNIXPW_DISABLE_SSL setting.\n"); } else { if (openssl_present()) { rfbLog("set -ssl in -unixpw mode.\n"); use_openssl = 1; } else if (inetd) { rfbLog("could not set -ssl in -inetd" " + -unixpw mode.\n"); exit(1); } else { rfbLog("set -stunnel in -unixpw mode.\n"); use_stunnel = 1; } } } } if (use_stunnel && ! got_localhost) { if (! getenv("STUNNEL_DISABLE_LOCALHOST") && ! getenv("UNIXPW_DISABLE_LOCALHOST")) { if (! quiet) { rfbLog("Setting -localhost in -stunnel mode.\n"); } allow_list = strdup("127.0.0.1"); got_localhost = 1; } } if (ssl_verify && ! use_stunnel && ! use_openssl) { rfbLog("-sslverify must be used with -ssl or -stunnel\n"); exit(1); } if (https_port_num >= 0 && ! use_openssl) { rfbLog("-https must be used with -ssl\n"); exit(1); } /* fixup settings that do not make sense */ if (use_threads && nofb && cursor_pos_updates) { if (! quiet) { rfbLog("disabling -threads under -nofb -cursorpos\n"); } use_threads = 0; } if (tile_fuzz < 1) { tile_fuzz = 1; } if (waitms < 0) { waitms = 0; } if (alpha_threshold < 0) { alpha_threshold = 0; } if (alpha_threshold > 256) { alpha_threshold = 256; } if (alpha_frac < 0.0) { alpha_frac = 0.0; } if (alpha_frac > 1.0) { alpha_frac = 1.0; } if (alpha_blend) { alpha_remove = 0; } if (cmap8to24 && overlay) { if (! quiet) { rfbLog("disabling -overlay in -8to24 mode.\n"); } overlay = 0; } if (filexfer && view_only) { if (! quiet) { rfbLog("setting -nofilexfer in -viewonly mode.\n"); } /* how to undo via -R? */ filexfer = 0; } if (inetd) { shared = 0; connect_once = 1; bg = 0; if (use_stunnel) { exit(1); } /* others? */ } if (flip_byte_order && using_shm && ! quiet) { rfbLog("warning: -flipbyte order only works with -noshm\n"); } if (! wireframe_copyrect) { set_wirecopyrect_mode(NULL); } if (! scroll_copyrect) { set_scrollcopyrect_mode(NULL); } if (screen_fixup_str) { parse_fixscreen(); } initialize_scroll_matches(); initialize_scroll_term(); initialize_max_keyrepeat(); /* increase rfbwait if threaded */ if (use_threads && ! got_rfbwait) { rfbMaxClientWait = 604800000; } /* no framebuffer (Win2VNC) mode */ if (nofb) { /* disable things that do not make sense with no fb */ set_nofb_params(0); if (! got_deferupdate && ! got_defer) { /* reduce defer time under -nofb */ defer_update = defer_update_nofb; } if (got_pointer_mode < 0) { pointer_mode = POINTER_MODE_NOFB; } } if (raw_fb_str) { set_raw_fb_params(0); } if (! got_deferupdate) { char tmp[40]; sprintf(tmp, "%d", defer_update); argv_vnc[argc_vnc++] = strdup("-deferupdate"); argv_vnc[argc_vnc++] = strdup(tmp); } if (debug_pointer || debug_keyboard) { if (bg || quiet) { rfbLog("disabling -bg/-q under -debug_pointer" "/-debug_keyboard\n"); bg = 0; quiet = 0; } } /* initialize added_keysyms[] array to zeros */ add_keysym(NoSymbol); /* tie together cases of -localhost vs. -listen localhost */ if (! listen_str) { if (allow_list && !strcmp(allow_list, "127.0.0.1")) { listen_str = strdup("localhost"); argv_vnc[argc_vnc++] = strdup("-listen"); argv_vnc[argc_vnc++] = strdup(listen_str); } } else if (!strcmp(listen_str, "localhost") || !strcmp(listen_str, "127.0.0.1")) { allow_list = strdup("127.0.0.1"); } /* set OS struct UT */ uname(&UT); initialize_crash_handler(); if (! quiet) { print_settings(try_http, bg, gui_str); } else { rfbLogEnable(0); } X_INIT; SCR_INIT; /* open the X display: */ if (auth_file) { set_env("XAUTHORITY", auth_file); } #if LIBVNCSERVER_HAVE_XKEYBOARD /* * Disable XKEYBOARD before calling XOpenDisplay() * this should be used if there is ambiguity in the keymapping. */ if (xkbcompat) { Bool rc = XkbIgnoreExtension(True); if (! quiet) { rfbLog("Disabling xkb XKEYBOARD extension. rc=%d\n", rc); } if (watch_bell) { watch_bell = 0; if (! quiet) rfbLog("Disabling bell.\n"); } } #else watch_bell = 0; use_xkb_modtweak = 0; #endif #ifdef LIBVNCSERVER_WITH_TIGHTVNC_FILETRANSFER if (filexfer) { rfbRegisterTightVNCFileTransferExtension(); } else { rfbUnregisterTightVNCFileTransferExtension(); } #endif initialize_allowed_input(); if (users_list && strstr(users_list, "lurk=")) { if (use_dpy) { rfbLog("warning: -display does not make sense in " "\"lurk=\" mode...\n"); } lurk_loop(users_list); } else if (use_dpy && strstr(use_dpy, "WAIT:") == use_dpy) { waited_for_client = wait_for_client(&argc_vnc, argv_vnc, try_http && ! got_httpdir); } if (use_dpy) { dpy = XOpenDisplay_wr(use_dpy); } else if ( (use_dpy = getenv("DISPLAY")) ) { dpy = XOpenDisplay_wr(use_dpy); } else { dpy = XOpenDisplay_wr(""); } if (! dpy && raw_fb_str) { rfbLog("continuing without X display in -rawfb mode, " "hold on tight..\n"); goto raw_fb_pass_go_and_collect_200_dollars; } if (! dpy && ! use_dpy && ! getenv("DISPLAY")) { int i, s = 4; rfbLogEnable(1); rfbLog("\a\n"); rfbLog("*** XOpenDisplay failed. No -display or DISPLAY.\n"); rfbLog("*** Trying \":0\" in %d seconds. Press Ctrl-C to" " abort.\n", s); rfbLog("*** "); for (i=1; i<=s; i++) { fprintf(stderr, "%d ", i); sleep(1); } fprintf(stderr, "\n"); use_dpy = ":0"; dpy = XOpenDisplay_wr(use_dpy); if (dpy) { rfbLog("*** XOpenDisplay of \":0\" successful.\n"); } rfbLog("\n"); if (quiet) rfbLogEnable(0); } if (! dpy) { char *d = use_dpy; if (!d) d = getenv("DISPLAY"); if (!d) d = "null"; rfbLogEnable(1); fprintf(stderr, "\n"); rfbLog("***************************************\n", d); rfbLog("*** XOpenDisplay failed (%s)\n", d); xopen_display_fail_message(d); exit(1); } else if (use_dpy) { if (! quiet) rfbLog("Using X display %s\n", use_dpy); } else { if (! quiet) rfbLog("Using default X display.\n"); } scr = DefaultScreen(dpy); rootwin = RootWindow(dpy, scr); if (! quiet) { rfbLog("\n"); rfbLog("------------------ USEFUL INFORMATION ------------------\n"); } if (remote_cmd || query_cmd) { int rc = do_remote_query(remote_cmd, query_cmd, remote_sync, query_default); XFlush_wr(dpy); fflush(stderr); fflush(stdout); usleep(30 * 1000); /* still needed? */ XCloseDisplay_wr(dpy); exit(rc); } if (priv_remote) { if (! remote_control_access_ok()) { rfbLog("** Disabling remote commands in -privremote " "mode.\n"); accept_remote_cmds = 0; } } sync_tod_with_servertime(); if (grab_buster) { spawn_grab_buster(); } #if LIBVNCSERVER_HAVE_LIBXFIXES if (! XFixesQueryExtension(dpy, &xfixes_base_event_type, &er)) { if (! quiet) { rfbLog("Disabling XFIXES mode: display does not " "support it.\n"); } xfixes_base_event_type = 0; xfixes_present = 0; } else { xfixes_present = 1; } #endif if (! xfixes_present) { use_xfixes = 0; } #if LIBVNCSERVER_HAVE_LIBXDAMAGE if (! XDamageQueryExtension(dpy, &xdamage_base_event_type, &er)) { if (! quiet) { rfbLog("Disabling X DAMAGE mode: display does not " "support it.\n"); } xdamage_base_event_type = 0; xdamage_present = 0; } else { xdamage_present = 1; } #endif if (! xdamage_present) { use_xdamage = 0; } if (! quiet && xdamage_present && use_xdamage) { rfbLog("X DAMAGE available on display, using it for" " polling hints.\n"); rfbLog(" To disable this behavior use: " "'-noxdamage'\n"); } if (! quiet && wireframe) { rfbLog("Wireframing: -wireframe mode is in effect for window " "moves.\n"); rfbLog(" If this yields undesired behavior (poor response, " "painting\n"); rfbLog(" errors, etc) it may be disabled:\n"); rfbLog(" - use '-nowf' to disable wireframing completely.\n"); rfbLog(" - use '-nowcr' to disable the Copy Rectangle after " "the\n"); rfbLog(" moved window is released in the new position.\n"); rfbLog(" Also see the -help entry for tuning parameters.\n"); rfbLog(" You can press 3 Alt_L's (Left \"Alt\" key) in a row" " to \n"); rfbLog(" repaint the screen, also see the -fixscreen option" " for\n"); rfbLog(" periodic repaints.\n"); if (scale_str && !strstr(scale_str, "nocr")) { rfbLog(" Note: '-scale' is on and this can cause " "more problems.\n"); } } overlay_present = 0; #ifdef SOLARIS_OVERLAY if (! XQueryExtension(dpy, "SUN_OVL", &maj, &ev, &er)) { if (! quiet && overlay) { rfbLog("Disabling -overlay: SUN_OVL " "extension not available.\n"); } } else { overlay_present = 1; } #endif #ifdef IRIX_OVERLAY if (! XReadDisplayQueryExtension(dpy, &ev, &er)) { if (! quiet && overlay) { rfbLog("Disabling -overlay: IRIX ReadDisplay " "extension not available.\n"); } } else { overlay_present = 1; } #endif if (overlay && !overlay_present) { overlay = 0; overlay_cursor = 0; } /* cursor shapes setup */ if (! multiple_cursors_mode) { multiple_cursors_mode = strdup("default"); } if (show_cursor) { if(!strcmp(multiple_cursors_mode, "default") && xfixes_present && use_xfixes) { free(multiple_cursors_mode); multiple_cursors_mode = strdup("most"); if (! quiet) { rfbLog("XFIXES available on display, resetting" " cursor mode\n"); rfbLog(" to: '-cursor most'.\n"); rfbLog(" to disable this behavior use: " "'-cursor arrow'\n"); rfbLog(" or '-noxfixes'.\n"); } } if(!strcmp(multiple_cursors_mode, "most")) { if (xfixes_present && use_xfixes && overlay_cursor == 1) { if (! quiet) { rfbLog("using XFIXES for cursor " "drawing.\n"); } overlay_cursor = 0; } } } if (overlay) { using_shm = 0; if (flash_cmap && ! quiet) { rfbLog("warning: -flashcmap may be " "incompatible with -overlay\n"); } if (show_cursor && overlay_cursor) { char *s = multiple_cursors_mode; if (*s == 'X' || !strcmp(s, "some") || !strcmp(s, "arrow")) { /* * user wants these modes, so disable fb cursor */ overlay_cursor = 0; } else { /* * "default" and "most", we turn off * show_cursor since it will automatically * be in the framebuffer. */ show_cursor = 0; } } } initialize_cursors_mode(); /* check for XTEST */ if (! XTestQueryExtension_wr(dpy, &ev, &er, &maj, &min)) { if (! quiet) { rfbLog("WARNING: XTEST extension not available " "(either missing from\n"); rfbLog(" display or client library libXtst " "missing at build time).\n"); rfbLog(" MOST user input (pointer and keyboard) " "will be DISCARDED.\n"); rfbLog(" If display does have XTEST, be sure to " "build x11vnc with\n"); rfbLog(" a working libXtst build environment " "(e.g. libxtst-dev,\n"); rfbLog(" or other packages).\n"); rfbLog("No XTEST extension, switching to " "-xwarppointer mode for\n"); rfbLog(" pointer motion input.\n"); } xtest_present = 0; use_xwarppointer = 1; } else { xtest_present = 1; xtest_base_event_type = ev; if (maj <= 1 || (maj == 2 && min <= 2)) { /* no events defined as of 2.2 */ xtest_base_event_type = 0; } } if (! XETrapQueryExtension_wr(dpy, &ev, &er, &maj)) { xtrap_present = 0; } else { xtrap_present = 1; xtrap_base_event_type = ev; } /* * Window managers will often grab the display during resize, * etc, using XGrabServer(). To avoid deadlock (our user resize * input is not processed) we tell the server to process our * requests during all grabs: */ disable_grabserver(dpy, 0); /* check for RECORD */ if (! XRecordQueryVersion_wr(dpy, &maj, &min)) { xrecord_present = 0; } else { xrecord_present = 1; } initialize_xrecord(); tmpi = 1; if (scroll_copyrect) { if (strstr(scroll_copyrect, "never")) { tmpi = 0; } } else if (scroll_copyrect_default) { if (strstr(scroll_copyrect_default, "never")) { tmpi = 0; } } if (! xrecord_present) { tmpi = 0; } #if !LIBVNCSERVER_HAVE_RECORD tmpi = 0; #endif if (! quiet && tmpi) { rfbLog("Scroll Detection: -scrollcopyrect mode is in effect " "to\n"); rfbLog(" use RECORD extension to try to detect scrolling " "windows\n"); rfbLog(" (induced by either user keystroke or mouse input).\n"); rfbLog(" If this yields undesired behavior (poor response, " "painting\n"); rfbLog(" errors, etc) it may be disabled via: '-noscr'\n"); rfbLog(" Also see the -help entry for tuning parameters.\n"); rfbLog(" You can press 3 Alt_L's (Left \"Alt\" key) in a row" " to \n"); rfbLog(" repaint the screen, also see the -fixscreen option" " for\n"); rfbLog(" periodic repaints.\n"); if (scale_str && !strstr(scale_str, "nocr")) { rfbLog(" Note: '-scale' is on and this can cause " "more problems.\n"); } } /* check for OS with small shm limits */ if (using_shm && ! single_copytile) { if (limit_shm()) { single_copytile = 1; } } single_copytile_orig = single_copytile; /* check for MIT-SHM */ if (! XShmQueryExtension_wr(dpy)) { xshm_present = 0; if (! using_shm) { if (! quiet) { rfbLog("info: display does not support" " XShm.\n"); } } else { if (! quiet) { rfbLog("warning: XShm extension is not available.\n"); rfbLog("For best performance the X Display should be" " local. (i.e.\n"); rfbLog("the x11vnc and X server processes should be" " running on\n"); rfbLog("the same machine.)\n"); #if LIBVNCSERVER_HAVE_XSHM rfbLog("Restart with -noshm to override this.\n"); } exit(1); #else rfbLog("Switching to -noshm mode.\n"); } using_shm = 0; #endif } } #if LIBVNCSERVER_HAVE_XKEYBOARD /* check for XKEYBOARD */ initialize_xkb(); initialize_watch_bell(); if (!xkb_present && use_xkb_modtweak) { if (! quiet) { rfbLog("warning: disabling xkb modtweak." " XKEYBOARD ext. not present.\n"); } use_xkb_modtweak = 0; } #endif if (xkb_present && !use_xkb_modtweak && !got_noxkb) { if (use_modifier_tweak) { switch_to_xkb_if_better(); } } #if LIBVNCSERVER_HAVE_LIBXRANDR if (! XRRQueryExtension(dpy, &xrandr_base_event_type, &er)) { if (xrandr && ! quiet) { rfbLog("Disabling -xrandr mode: display does not" " support X RANDR.\n"); } xrandr_base_event_type = 0; xrandr = 0; xrandr_present = 0; } else { xrandr_present = 1; } #endif check_pm(); if (! quiet) { rfbLog("--------------------------------------------------------\n"); rfbLog("\n"); } raw_fb_pass_go_and_collect_200_dollars: if (! dt) { static char str[] = "-desktop"; argv_vnc[argc_vnc++] = str; argv_vnc[argc_vnc++] = choose_title(use_dpy); rfb_desktop_name = strdup(argv_vnc[argc_vnc-1]); } initialize_pipeinput(); /* * Create the XImage corresponding to the display framebuffer. */ fb0 = initialize_xdisplay_fb(); /* * n.b. we do not have to X_LOCK any X11 calls until watch_loop() * is called since we are single-threaded until then. */ initialize_screen(&argc_vnc, argv_vnc, fb0); if (waited_for_client) { if (fake_fb) { free(fake_fb); fake_fb = NULL; } if (use_solid_bg && client_count) { solid_bg(0); } } if (! waited_for_client) { if (try_http && ! got_httpdir && check_httpdir()) { http_connections(1); } } initialize_tiles(); /* rectangular blackout regions */ initialize_blackouts_and_xinerama(); /* created shm or XImages when using_shm = 0 */ initialize_polling_images(); initialize_signals(); initialize_speeds(); initialize_keyboard_and_pointer(); if (inetd && use_openssl) { if (! waited_for_client) { accept_openssl(OPENSSL_INETD); } } if (! inetd && ! use_openssl) { if (! screen->port || screen->listenSock < 0) { rfbLogEnable(1); rfbLog("Error: could not obtain listening port.\n"); clean_up_exit(1); } } if (! quiet) { rfbLog("screen setup finished.\n"); if (SHOW_NO_PASSWORD_WARNING && !nopw) { rfbLog("\n"); rfbLog("WARNING: You are running x11vnc WITHOUT" " a password. See\n"); rfbLog("WARNING: the warning message printed above" " for more info.\n"); } } set_vnc_desktop_name(); #if LIBVNCSERVER_HAVE_FORK && LIBVNCSERVER_HAVE_SETSID if (bg) { /* fork into the background now */ int p, n; if ((p = fork()) > 0) { exit(0); } else if (p == -1) { rfbLogEnable(1); fprintf(stderr, "could not fork\n"); perror("fork"); clean_up_exit(1); } if (setsid() == -1) { rfbLogEnable(1); fprintf(stderr, "setsid failed\n"); perror("setsid"); clean_up_exit(1); } /* adjust our stdio */ n = open("/dev/null", O_RDONLY); dup2(n, 0); dup2(n, 1); if (! logfile) { dup2(n, 2); } if (n > 2) { close(n); } } #endif watch_loop(); return(0); #undef argc #undef argv }