/* See LICENSE file for license details. */ #define _XOPEN_SOURCE 500 #define LENGTH(X) (sizeof X / sizeof X[0]) #if HAVE_SHADOW_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef XINERAMA #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include "arg.h" #include "util.h" #include #define LENGTH(X) (sizeof X / sizeof X[0]) #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask)) static unsigned int numlockmask = 0; char *argv0; /* global count to prevent repeated error messages */ int count_error = 0; static int pam_conv(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr); struct pam_conv pamc = {pam_conv, NULL}; char passwd[256]; enum { INIT, INPUT, INPUT_ALT, FAILED, CAPS, CAPS_ALT, PAM, NUMCOLS }; typedef struct { unsigned int mod; KeySym keysym; } Passthrough; typedef struct { const char *pass; const char *command; } secretpass; struct displayData{ struct lock **locks; Display* dpy; int nscreens; cairo_t **crs; cairo_surface_t **surfaces; }; static pthread_mutex_t mutex= PTHREAD_MUTEX_INITIALIZER; #include "config.h" struct lock { int screen; Window root, win; Pixmap pmap; Pixmap bgmap; unsigned long colors[NUMCOLS]; unsigned int x, y; unsigned int xoff, yoff, mw, mh; Drawable drawable; GC gc; XRectangle rectangles[LENGTH(rectangles)]; }; struct xrandr { int active; int evbase; int errbase; }; Imlib_Image image; Imlib_Image image; static void die(const char *errstr, ...) { va_list ap; va_start(ap, errstr); vfprintf(stderr, errstr, ap); va_end(ap); exit(1); } static int pam_conv(int num_msg, const struct pam_message **msg, struct pam_response **resp, void *appdata_ptr) { int retval = PAM_CONV_ERR; for(int i=0; imsg_style == PAM_PROMPT_ECHO_OFF && strncmp(msg[i]->msg, "Password: ", 10) == 0) { struct pam_response *resp_msg = malloc(sizeof(struct pam_response)); if (!resp_msg) die("malloc failed\n"); char *password = malloc(strlen(passwd) + 1); if (!password) die("malloc failed\n"); memset(password, 0, strlen(passwd) + 1); strcpy(password, passwd); resp_msg->resp_retcode = 0; resp_msg->resp = password; resp[i] = resp_msg; retval = PAM_SUCCESS; } } return retval; } #ifdef __linux__ #include #include static void dontkillme(void) { FILE *f; const char oomfile[] = "/proc/self/oom_score_adj"; if (!(f = fopen(oomfile, "w"))) { if (errno == ENOENT) return; die("slock: fopen %s: %s\n", oomfile, strerror(errno)); } fprintf(f, "%d", OOM_SCORE_ADJ_MIN); if (fclose(f)) { if (errno == EACCES) die("slock: unable to disable OOM killer. " "Make sure to suid or sgid slock.\n"); else die("slock: fclose %s: %s\n", oomfile, strerror(errno)); } } #endif static void writemessage(Display *dpy, Window win, int screen) { int len, line_len, width, height, s_width, s_height, i, j, k, tab_replace, tab_size; XftFont *fontinfo; XftColor xftcolor; XftDraw *xftdraw; XGlyphInfo ext_msg, ext_space; XineramaScreenInfo *xsi; xftdraw = XftDrawCreate(dpy, win, DefaultVisual(dpy, screen), DefaultColormap(dpy, screen)); fontinfo = XftFontOpenName(dpy, screen, font_name); XftColorAllocName(dpy, DefaultVisual(dpy, screen), DefaultColormap(dpy, screen), text_color, &xftcolor); if (fontinfo == NULL) { if (count_error == 0) { fprintf(stderr, "slock: Unable to load font \"%s\"\n", font_name); count_error++; } return; } XftTextExtentsUtf8(dpy, fontinfo, (XftChar8 *) " ", 1, &ext_space); tab_size = 8 * ext_space.width; /* To prevent "Uninitialized" warnings. */ xsi = NULL; /* * Start formatting and drawing text */ len = strlen(message); /* Max max line length (cut at '\n') */ line_len = 0; k = 0; for (i = j = 0; i < len; i++) { if (message[i] == '\n') { if (i - j > line_len) line_len = i - j; k++; i++; j = i; } } /* If there is only one line */ if (line_len == 0) line_len = len; if (XineramaIsActive(dpy)) { xsi = XineramaQueryScreens(dpy, &i); s_width = xsi[0].width; s_height = xsi[0].height; } else { s_width = DisplayWidth(dpy, screen); s_height = DisplayHeight(dpy, screen); } XftTextExtentsUtf8(dpy, fontinfo, (XftChar8 *)message, line_len, &ext_msg); height = s_height*3/4 - (k*20)/3; width = (s_width - ext_msg.width)/2; /* Look for '\n' and print the text between them. */ for (i = j = k = 0; i <= len; i++) { /* i == len is the special case for the last line */ if (i == len || message[i] == '\n') { tab_replace = 0; while (message[j] == '\t' && j < i) { tab_replace++; j++; } XftDrawStringUtf8(xftdraw, &xftcolor, fontinfo, width + tab_size*tab_replace, height + 20*k, (XftChar8 *)(message + j), i - j); while (i < len && message[i] == '\n') { i++; j = i; k++; } } } /* xsi should not be NULL anyway if Xinerama is active, but to be safe */ if (XineramaIsActive(dpy) && xsi != NULL) XFree(xsi); XftFontClose(dpy, fontinfo); XftColorFree(dpy, DefaultVisual(dpy, screen), DefaultColormap(dpy, screen), &xftcolor); XftDrawDestroy(xftdraw); } static const char * gethash(void) { const char *hash; struct passwd *pw; /* Check if the current user has a password entry */ errno = 0; if (!(pw = getpwuid(getuid()))) { if (errno) die("slock: getpwuid: %s\n", strerror(errno)); else die("slock: cannot retrieve password entry\n"); } hash = pw->pw_passwd; #if HAVE_SHADOW_H if (!strcmp(hash, "x")) { struct spwd *sp; if (!(sp = getspnam(pw->pw_name))) die("slock: getspnam: cannot retrieve shadow entry. " "Make sure to suid or sgid slock.\n"); hash = sp->sp_pwdp; } #else if (!strcmp(hash, "*")) { #ifdef __OpenBSD__ if (!(pw = getpwuid_shadow(getuid()))) die("slock: getpwnam_shadow: cannot retrieve shadow entry. " "Make sure to suid or sgid slock.\n"); hash = pw->pw_passwd; #else die("slock: getpwuid: cannot retrieve shadow entry. " "Make sure to suid or sgid slock.\n"); #endif /* __OpenBSD__ */ } #endif /* HAVE_SHADOW_H */ /* pam, store user name */ hash = pw->pw_name; return hash; } static void resizerectangles(struct lock *lock) { int i; for (i = 0; i < LENGTH(rectangles); i++){ lock->rectangles[i].x = (rectangles[i].x * logosize) + lock->xoff + ((lock->mw) / 2) - (logow / 2 * logosize); lock->rectangles[i].y = (rectangles[i].y * logosize) + lock->yoff + ((lock->mh) / 2) - (logoh / 2 * logosize); lock->rectangles[i].width = rectangles[i].width * logosize; lock->rectangles[i].height = rectangles[i].height * logosize; } } static void drawlogo(Display *dpy, struct lock *lock, int color) { /* XSetForeground(dpy, lock->gc, lock->colors[BACKGROUND]); XFillRectangle(dpy, lock->drawable, lock->gc, 0, 0, lock->x, lock->y); */ lock->drawable = lock->bgmap; XSetForeground(dpy, lock->gc, lock->colors[color]); XFillRectangles(dpy, lock->drawable, lock->gc, lock->rectangles, LENGTH(rectangles)); XCopyArea(dpy, lock->drawable, lock->win, lock->gc, 0, 0, lock->x, lock->y, 0, 0); XSync(dpy, False); } static void refresh(Display *dpy, Window win , int screen, struct tm time, cairo_t* cr, cairo_surface_t* sfc) {/*Function that displays given time on the given screen*/ static char tm[64] = ""; int xpos,ypos; double text_width, text_height; sprintf(tm,"%02d/%02d/%02d %02d:%02d",time.tm_year+1900,time.tm_mon+1,time.tm_mday,time.tm_hour,time.tm_min); XClearWindow(dpy, win); cairo_set_source_rgb(cr, textcolorred, textcolorgreen, textcolorblue); cairo_select_font_face(cr, textfamily, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD); cairo_set_font_size(cr, textsize); cairo_text_extents_t extents; cairo_text_extents(cr, tm, &extents); text_width = extents.width; text_height = extents.height; /* Center text horizontally and vertically based on text center point */ xpos = (DisplayWidth(dpy, screen) / 2) - (text_width / 2) - extents.x_bearing; ypos = (DisplayHeight(dpy, screen) / 2) - (text_height / 2) - extents.y_bearing; cairo_move_to(cr, xpos, ypos); cairo_show_text(cr, tm); cairo_surface_flush(sfc); writemessage(dpy, win, screen); XFlush(dpy); } static void* displayTime(void* input) { /*Thread that keeps track of time and refreshes it every 5 seconds */ struct displayData* displayData=(struct displayData*)input; while (1){ pthread_mutex_lock(&mutex); /*Mutex to prevent interference with refreshing screen while typing password*/ time_t rawtime; time(&rawtime); struct tm tm = *localtime(&rawtime); for (int k=0;knscreens;k++){ refresh(displayData->dpy, displayData->locks[k]->win, displayData->locks[k]->screen, tm,displayData->crs[k],displayData->surfaces[k]); } pthread_mutex_unlock(&mutex); sleep(5); } return NULL; } static void readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens, const char *hash,cairo_t **crs,cairo_surface_t **surfaces) { XRRScreenChangeNotifyEvent *rre; char buf[32]; int caps, num, screen, running, failure, oldc, retval, i, passing; unsigned int len, color, indicators; KeySym ksym; XEvent ev; pam_handle_t *pamh; len = 0; caps = 0; running = 1; failure = 0; oldc = INIT; if (!XkbGetIndicatorState(dpy, XkbUseCoreKbd, &indicators)) caps = indicators & 1; while (running && !XNextEvent(dpy, &ev)) { if (ev.type == KeyPress) { explicit_bzero(&buf, sizeof(buf)); num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0); if (IsKeypadKey(ksym)) { if (ksym == XK_KP_Enter) ksym = XK_Return; else if (ksym >= XK_KP_0 && ksym <= XK_KP_9) ksym = (ksym - XK_KP_0) + XK_0; } if (IsFunctionKey(ksym) || IsKeypadKey(ksym) || IsMiscFunctionKey(ksym) || IsPFKey(ksym) || IsPrivateKeypadKey(ksym)) continue; passing = 0; for (i = 0; i < LENGTH(passthroughs); i++) { if (ksym == passthroughs[i].keysym && CLEANMASK(passthroughs[i].mod) == CLEANMASK(ev.xkey.state)) { passing = 1; XSendEvent(dpy, DefaultRootWindow(dpy), True, KeyPressMask, &ev); break; } } if(passing) continue; switch (ksym) { case XK_Return: passwd[len] = '\0'; errno = 0; for (int i = 0; i < entrylen; i++){ if (strcmp(scom[i].pass, passwd) == 0){ system(scom[i].command); } } retval = pam_start(pam_service, hash, &pamc, &pamh); color = PAM; for (screen = 0; screen < nscreens; screen++) { XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]); XClearWindow(dpy, locks[screen]->win); XRaiseWindow(dpy, locks[screen]->win); } XSync(dpy, False); if (retval == PAM_SUCCESS) retval = pam_authenticate(pamh, 0); if (retval == PAM_SUCCESS) retval = pam_acct_mgmt(pamh, 0); running = 1; if (retval == PAM_SUCCESS) running = 0; else fprintf(stderr, "slock: %s\n", pam_strerror(pamh, retval)); pam_end(pamh, retval); if (running) { if (xbell == 1) XBell(dpy, 100); failure = 1; } explicit_bzero(&passwd, sizeof(passwd)); len = 0; break; case XK_Escape: explicit_bzero(&passwd, sizeof(passwd)); len = 0; break; case XK_BackSpace: if (len) passwd[--len] = '\0'; break; case XK_Caps_Lock: caps = !caps; break; default: if (controlkeyclear && iscntrl((int)buf[0])) continue; if (num && (len + num < sizeof(passwd))) { memcpy(passwd + len, buf, num); len += num; } else { continue; /* Don't trigger fail screen when pressing control characters */ } break; } color = len ? (caps ? (len % 2 ? CAPS : CAPS_ALT) : (len % 2 ? INPUT : INPUT_ALT)) : ((failure || failonclear) ? FAILED : INIT); if (running && oldc != color) { pthread_mutex_lock(&mutex); /*Stop the time refresh thread from interfering*/ for (screen = 0; screen < nscreens; screen++) { time_t rawtime; time(&rawtime); refresh(dpy, locks[screen]->win,locks[screen]->screen, *localtime(&rawtime),crs[screen],surfaces[screen]); /*Redraw the time after screen cleared*/ drawlogo(dpy, locks[screen], color); writemessage(dpy, locks[screen]->win, screen); } pthread_mutex_unlock(&mutex); oldc = color; } } else if (rr->active && ev.type == rr->evbase + RRScreenChangeNotify) { rre = (XRRScreenChangeNotifyEvent*)&ev; pthread_mutex_lock(&mutex); /*Stop the time refresh thread from interfering.*/ for (screen = 0; screen < nscreens; screen++) { if (locks[screen]->win == rre->window) { if (rre->rotation == RR_Rotate_90 || rre->rotation == RR_Rotate_270) XResizeWindow(dpy, locks[screen]->win, rre->height, rre->width); else XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height); XClearWindow(dpy, locks[screen]->win); break; } } pthread_mutex_unlock(&mutex); } else { for (screen = 0; screen < nscreens; screen++) XRaiseWindow(dpy, locks[screen]->win); } } } static struct lock * lockscreen(Display *dpy, struct xrandr *rr, int screen) { char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; int i, ptgrab, kbgrab; struct lock *lock; XColor color, dummy; XSetWindowAttributes wa; Cursor invisible; #ifdef XINERAMA XineramaScreenInfo *info; int n; #endif if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(struct lock)))) return NULL; lock->screen = screen; lock->root = RootWindow(dpy, lock->screen); if(image) { lock->bgmap = XCreatePixmap(dpy, lock->root, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), DefaultDepth(dpy, lock->screen)); imlib_context_set_image(image); imlib_context_set_display(dpy); imlib_context_set_visual(DefaultVisual(dpy, lock->screen)); imlib_context_set_colormap(DefaultColormap(dpy, lock->screen)); imlib_context_set_drawable(lock->bgmap); imlib_render_image_on_drawable(0, 0); imlib_free_image(); } for (i = 0; i < NUMCOLS; i++) { XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy); lock->colors[i] = color.pixel; } lock->x = DisplayWidth(dpy, lock->screen); lock->y = DisplayHeight(dpy, lock->screen); #ifdef XINERAMA if ((info = XineramaQueryScreens(dpy, &n))) { lock->xoff = info[0].x_org; lock->yoff = info[0].y_org; lock->mw = info[0].width; lock->mh = info[0].height; } else #endif { lock->xoff = lock->yoff = 0; lock->mw = lock->x; lock->mh = lock->y; } lock->drawable = XCreatePixmap(dpy, lock->root, lock->x, lock->y, DefaultDepth(dpy, screen)); lock->gc = XCreateGC(dpy, lock->root, 0, NULL); XSetLineAttributes(dpy, lock->gc, 1, LineSolid, CapButt, JoinMiter); /* init */ wa.override_redirect = 1; lock->win = XCreateWindow(dpy, lock->root, 0, 0, lock->x, lock->y, 0, DefaultDepth(dpy, lock->screen), CopyFromParent, DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa); if(lock->bgmap) XSetWindowBackgroundPixmap(dpy, lock->win, lock->bgmap); lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8); invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0); XDefineCursor(dpy, lock->win, invisible); resizerectangles(lock); /* Try to grab mouse pointer *and* keyboard for 600ms, else fail the lock */ for (i = 0, ptgrab = kbgrab = -1; i < 6; i++) { if (ptgrab != GrabSuccess) { ptgrab = XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime); } if (kbgrab != GrabSuccess) { kbgrab = XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime); } /* input is grabbed: we can lock the screen */ if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) { XMapRaised(dpy, lock->win); if (rr->active) XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask); XSelectInput(dpy, lock->root, SubstructureNotifyMask); drawlogo(dpy, lock, INIT); return lock; } /* retry on AlreadyGrabbed but fail on other errors */ if ((ptgrab != AlreadyGrabbed && ptgrab != GrabSuccess) || (kbgrab != AlreadyGrabbed && kbgrab != GrabSuccess)) break; usleep(100000); } /* we couldn't grab all input: fail out */ if (ptgrab != GrabSuccess) fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", screen); if (kbgrab != GrabSuccess) fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen); return NULL; } static void usage(void) { die("usage: slock [-v] [-m message] [cmd [arg ...]]\n"); } int main(int argc, char **argv) { struct xrandr rr; struct lock **locks; struct passwd *pwd; struct group *grp; uid_t duid; gid_t dgid; const char *hash; Display *dpy; int s, nlocks, nscreens; CARD16 standby, suspend, off; BOOL dpms_state; ARGBEGIN { case 'v': puts("slock-"VERSION); return 0; case 'm': message = EARGF(usage()); break; default: usage(); } ARGEND /* validate drop-user and -group */ errno = 0; if (!(pwd = getpwnam(getenv("USER")))) die("slock: getpwnam %s: %s\n", getenv("USER"), errno ? strerror(errno) : "user entry not found"); duid = pwd->pw_uid; errno = 0; if (!(grp = getgrnam(getenv("USER")))) die("slock: getgrnam %s: %s\n", getenv("USER"), errno ? strerror(errno) : "group entry not found"); dgid = grp->gr_gid; #ifdef __linux__ dontkillme(); #endif /* the contents of hash are used to transport the current user name */ hash = gethash(); errno = 0; XInitThreads(); if (!(dpy = XOpenDisplay(NULL))) die("slock: cannot open display\n"); /* drop privileges */ if (setgroups(0, NULL) < 0) die("slock: setgroups: %s\n", strerror(errno)); if (setgid(dgid) < 0) die("slock: setgid: %s\n", strerror(errno)); if (setuid(duid) < 0) die("slock: setuid: %s\n", strerror(errno)); /* Load picture */ char* home_path = getenv("HOME"); int size_needed = snprintf(NULL, 0, "mount | grep -q ' %s/Private '", home_path) + 1; char* command = malloc(size_needed); snprintf(command, size_needed, "mount | grep -q ' %s/Private '", home_path); int result = system(command); free(command); if (result == 0) { background_image = private_image; blurRadius = privateBlurRadius; } if (strcmp(background_image, "") == 0) { background_image = ".local/share/wallpapers/lock"; } size_needed = strlen(home_path) + strlen(background_image) + 2; // +2 for slash and null terminator char* full_background_image = malloc(size_needed); strcpy(full_background_image, home_path); strcat(full_background_image, "/"); strcat(full_background_image, background_image); Imlib_Image buffer = imlib_load_image(background_image); if (buffer) { /* Load picture */ imlib_context_set_image(buffer); int background_image_width = imlib_image_get_width(); int background_image_height = imlib_image_get_height(); /* Create an image to be rendered */ Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy)); image = imlib_create_image(scr->width, scr->height); imlib_context_set_image(image); /* Fill the image for every X monitor */ XRRMonitorInfo *monitors; int number_of_monitors; monitors = XRRGetMonitors(dpy, RootWindow(dpy, XScreenNumberOfScreen(scr)), True, &number_of_monitors); int i; for (i = 0; i < number_of_monitors; i++) { imlib_blend_image_onto_image(buffer, 0, 0, 0, background_image_width, background_image_height, monitors[i].x, monitors[i].y, monitors[i].width, monitors[i].height); } /* Clean up */ imlib_context_set_image(buffer); imlib_free_image(); imlib_context_set_image(image); } else { /*Create screenshot Image*/ Screen *scr = ScreenOfDisplay(dpy, DefaultScreen(dpy)); image = imlib_create_image(scr->width,scr->height); imlib_context_set_image(image); imlib_context_set_display(dpy); imlib_context_set_visual(DefaultVisual(dpy,0)); imlib_context_set_drawable(RootWindow(dpy,XScreenNumberOfScreen(scr))); imlib_copy_drawable_to_image(0,0,0,scr->width,scr->height,0,0,1); } #ifdef BLUR /*Blur function*/ imlib_image_blur(blurRadius); #endif // BLUR #ifdef PIXELATION /*Pixelation*/ int width = scr->width; int height = scr->height; for(int y = 0; y < height; y += pixelSize) { for(int x = 0; x < width; x += pixelSize) { int red = 0; int green = 0; int blue = 0; Imlib_Color pixel; Imlib_Color* pp; pp = &pixel; for(int j = 0; j < pixelSize && j < height; j++) { for(int i = 0; i < pixelSize && i < width; i++) { imlib_image_query_pixel(x+i,y+j,pp); red += pixel.red; green += pixel.green; blue += pixel.blue; } } red /= (pixelSize*pixelSize); green /= (pixelSize*pixelSize); blue /= (pixelSize*pixelSize); imlib_context_set_color(red,green,blue,pixel.alpha); imlib_image_fill_rectangle(x,y,pixelSize,pixelSize); red = 0; green = 0; blue = 0; } } #endif /* check for Xrandr support */ rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase); /* get number of screens in display "dpy" and blank them */ nscreens = ScreenCount(dpy); if (!(locks = calloc(nscreens, sizeof(struct lock *)))) die("slock: out of memory\n"); for (nlocks = 0, s = 0; s < nscreens; s++) { if ((locks[s] = lockscreen(dpy, &rr, s)) != NULL) { writemessage(dpy, locks[s]->win, s); nlocks++; } else { break; } } XSync(dpy, 0); /* did we manage to lock everything? */ if (nlocks != nscreens) return 1; /* DPMS magic to disable the monitor */ if (!DPMSCapable(dpy)) die("slock: DPMSCapable failed\n"); if (!DPMSInfo(dpy, &standby, &dpms_state)) die("slock: DPMSInfo failed\n"); if (!DPMSEnable(dpy) && !dpms_state) die("slock: DPMSEnable failed\n"); if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off)) die("slock: DPMSGetTimeouts failed\n"); if (!standby || !suspend || !off) die("slock: at least one DPMS variable is zero\n"); if (!DPMSSetTimeouts(dpy, monitortime, monitortime, monitortime)) die("slock: DPMSSetTimeouts failed\n"); XSync(dpy, 0); /* run post-lock command */ if (argc > 0) { switch (fork()) { case -1: die("slock: fork failed: %s\n", strerror(errno)); case 0: if (close(ConnectionNumber(dpy)) < 0) die("slock: close: %s\n", strerror(errno)); execvp(argv[0], argv); fprintf(stderr, "slock: execvp %s: %s\n", argv[0], strerror(errno)); _exit(1); } } /* everything is now blank. Wait for the correct password */ pthread_t thredid; /* Create Cairo drawables upon which the time will be shown. */ struct displayData displayData; cairo_surface_t **surfaces; cairo_t **crs; if (!(surfaces=calloc(nscreens, sizeof(cairo_surface_t*)))){ die("Out of memory"); } if (!(crs=calloc(nscreens, sizeof(cairo_t*)))){ die("Out of memory"); } for (int k=0;kwin; int screen=locks[k]->screen; XMapWindow(dpy, win); surfaces[k]=cairo_xlib_surface_create(dpy, win, DefaultVisual(dpy, screen),DisplayWidth(dpy, screen) , DisplayHeight(dpy, screen)); crs[k]=cairo_create(surfaces[k]); } displayData.dpy=dpy; displayData.locks=locks; displayData.nscreens=nscreens; displayData.crs=crs; displayData.surfaces=surfaces; /*Start the thread that redraws time every 5 seconds*/ pthread_create(&thredid, NULL, displayTime, &displayData); /*Wait for the password*/ readpw(dpy, &rr, locks, nscreens, hash,crs,surfaces); for (nlocks = 0, s = 0; s < nscreens; s++) { XFreePixmap(dpy, locks[s]->drawable); XFreeGC(dpy, locks[s]->gc); } /* reset DPMS values to inital ones */ DPMSSetTimeouts(dpy, standby, suspend, off); if (!dpms_state) DPMSDisable(dpy); XSync(dpy, 0); XCloseDisplay(dpy); return 0; }