slock

simple X display locker utility
git clone git://git.suckless.org/slock
Log | Files | Refs | README | LICENSE

commit 732d2b3bf5da3a1883b3246062aa556a59b8517c
parent 0cb05bdb75ac13f010d51e267007ca1c869763ec
Author: Anselm R Garbe <garbeam@gmail.com>
Date:   Thu, 26 Nov 2009 12:53:26 +0000

applied Fernando Silveira's multiscreen patch for old style multihead setups
Diffstat:
slock.c | 220++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------
1 file changed, 151 insertions(+), 69 deletions(-)

diff --git a/slock.c b/slock.c @@ -5,6 +5,7 @@ #endif #include <ctype.h> +#include <errno.h> #include <pwd.h> #include <stdarg.h> #include <stdlib.h> @@ -15,31 +16,42 @@ #include <X11/keysym.h> #include <X11/Xlib.h> #include <X11/Xutil.h> -#include <X11/extensions/dpms.h> #if HAVE_BSD_AUTH #include <login_cap.h> #include <bsd_auth.h> #endif +struct st_lock { + int screen; + Window root, w; + Pixmap pmap; +}; + +extern const char *__progname; + static void die(const char *errstr, ...) { va_list ap; + fprintf(stderr, "%s: ", __progname); va_start(ap, errstr); vfprintf(stderr, errstr, ap); va_end(ap); + fprintf(stderr, "\n"); + fflush(stderr); + exit(EXIT_FAILURE); } #ifndef HAVE_BSD_AUTH static const char * -get_password() { /* only run as root */ +get_password(void) { /* only run as root */ const char *rval; struct passwd *pw; if(geteuid() != 0) - die("slock: cannot retrieve password entry (make sure to suid slock)\n"); + die("cannot retrieve password entry (make sure to suid slock)"); pw = getpwuid(getuid()); endpwent(); rval = pw->pw_passwd; @@ -55,81 +67,34 @@ get_password() { /* only run as root */ /* drop privileges */ if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) - die("slock: cannot drop privileges\n"); + die("cannot drop privileges"); return rval; } #endif -int -main(int argc, char **argv) { - char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; +static void +#ifdef HAVE_BSD_AUTH +read_password(Display *dpy) +#else +read_password(Display *dpy, const char *pws) +#endif +{ char buf[32], passwd[256]; - int num, screen; + int num; -#ifndef HAVE_BSD_AUTH - const char *pws; -#endif unsigned int len; Bool running = True; - Cursor invisible; - Display *dpy; KeySym ksym; - Pixmap pmap; - Window root, w; - XColor black, dummy; XEvent ev; - XSetWindowAttributes wa; - CARD16 standby, suspend, off; - - if((argc == 2) && !strcmp("-v", argv[1])) - die("slock-"VERSION", © 2006-2008 Anselm R Garbe\n"); - else if(argc != 1) - die("usage: slock [-v]\n"); - -#ifndef HAVE_BSD_AUTH - pws = get_password(); -#endif - - if(!(dpy = XOpenDisplay(0))) - die("slock: cannot open display\n"); - screen = DefaultScreen(dpy); - root = RootWindow(dpy, screen); - /* init */ - wa.override_redirect = 1; - wa.background_pixel = BlackPixel(dpy, screen); - w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen), - 0, DefaultDepth(dpy, screen), CopyFromParent, - DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa); - XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy); - pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8); - invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0); - XDefineCursor(dpy, w, invisible); - XMapRaised(dpy, w); - for(len = 1000; len; len--) { - if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, - GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) - break; - usleep(1000); - } - if((running = running && (len > 0))) { - for(len = 1000; len; len--) { - if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime) - == GrabSuccess) - break; - usleep(1000); - } - running = (len > 0); - } len = 0; - XSync(dpy, False); + running = True; - if(DPMSCapable(dpy)) { /* save and customize DPMS settings */ - DPMSGetTimeouts(dpy, &standby, &suspend, &off); - DPMSSetTimeouts(dpy, 10, 30, 90); - } + /* As "slock" stands for "Simple X display locker", the DPMS settings + * had been removed and you can set it with "xset" or some other + * utility. This way the user can easily set a customized DPMS + * timeout. */ - /* main event loop */ while(running && !XNextEvent(dpy, &ev)) { if(ev.type == KeyPress) { buf[0] = 0; @@ -172,12 +137,129 @@ main(int argc, char **argv) { } } } - if(DPMSCapable(dpy)) { /* restore DPMS settings */ - DPMSSetTimeouts(dpy, standby, suspend, off); - } +} + +static void +unlockscreen(Display *dpy, struct st_lock *lock) { + if (dpy == NULL || lock == NULL) + return; + XUngrabPointer(dpy, CurrentTime); - XFreePixmap(dpy, pmap); - XDestroyWindow(dpy, w); + XFreePixmap(dpy, lock->pmap); + XDestroyWindow(dpy, lock->w); + + free(lock); +} + +static struct st_lock * +lockscreen(Display *dpy, int screen) { + char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; + unsigned int len; + struct st_lock *lock; + Bool running = True; + XColor black, dummy; + XSetWindowAttributes wa; + Cursor invisible; + + if (dpy == NULL || screen < 0) + return NULL; + + lock = malloc(sizeof(struct st_lock)); + if (lock == NULL) + return NULL; + + lock->screen = screen; + + lock->root = RootWindow(dpy, lock->screen); + + /* init */ + wa.override_redirect = 1; + wa.background_pixel = BlackPixel(dpy, lock->screen); + lock->w = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen), + 0, DefaultDepth(dpy, lock->screen), CopyFromParent, + DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa); + XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), "black", &black, &dummy); + lock->pmap = XCreateBitmapFromData(dpy, lock->w, curs, 8, 8); + invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0); + XDefineCursor(dpy, lock->w, invisible); + XMapRaised(dpy, lock->w); + for(len = 1000; len; len--) { + if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, + GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess) + break; + usleep(1000); + } + if((running = running && (len > 0))) { + for(len = 1000; len; len--) { + if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) + == GrabSuccess) + break; + usleep(1000); + } + running = (len > 0); + } + + if (!running) { + unlockscreen(dpy, lock); + lock = NULL; + } + + return lock; +} + +static void +usage(void) { + fprintf(stderr, "usage: %s -v", __progname); + exit(EXIT_FAILURE); +} + +int +main(int argc, char **argv) { +#ifndef HAVE_BSD_AUTH + const char *pws; +#endif + Display *dpy; + int nscreens, screen; + + struct st_lock **locks; + + if((argc == 2) && !strcmp("-v", argv[1])) + die("slock-%s, © 2006-2008 Anselm R Garbe", VERSION); + else if(argc != 1) + usage(); + +#ifndef HAVE_BSD_AUTH + pws = get_password(); +#endif + + if(!(dpy = XOpenDisplay(0))) + die("cannot open display"); + + /* Get the number of screens in display "dpy" and blank them all. */ + nscreens = ScreenCount(dpy); + locks = malloc(sizeof(struct st_lock *) * nscreens); + if (locks == NULL) + die("malloc: %s", strerror(errno)); + + for (screen = 0; screen < nscreens; screen++) + locks[screen] = lockscreen(dpy, screen); + + XSync(dpy, False); + + /* Everything is now blank. Now wait for the correct password. */ +#ifdef HAVE_BSD_AUTH + read_password(dpy); +#else + read_password(dpy, pws); +#endif + + /* Password ok, unlock everything and quit. */ + for (screen = 0; screen < nscreens; screen++) + unlockscreen(dpy, locks[screen]); + + free(locks); + XCloseDisplay(dpy); + return 0; }