X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=slock.c;h=7f74f716e6abe538ea2d31f5c48bd5b5dcaab3f2;hb=7a217cb7c4f1a7439b76f5fb839035d7021eb7ff;hp=ba75493f22e6918694f9f5091f68e84d2071f97d;hpb=d83a9a1d01fb70df9859ea231c8d7a2fb898c1e7;p=slock.git diff --git a/slock.c b/slock.c index ba75493..7f74f71 100644 --- a/slock.c +++ b/slock.c @@ -1,13 +1,13 @@ -/* (C)opyright MMVI-MMVII Anselm R. Garbe - * See LICENSE file for license details. - */ +/* See LICENSE file for license details. */ #define _XOPEN_SOURCE 500 #if HAVE_SHADOW_H #include #endif #include +#include #include +#include #include #include #include @@ -17,16 +17,40 @@ #include #include -const char * -get_password() { /* only run as root */ +#if HAVE_BSD_AUTH +#include +#include +#endif + +typedef struct { + int screen; + Window root, win; + Pixmap pmap; +} Lock; + +static Lock **locks; +static int nscreens; +static Bool running = True; + +static void +die(const char *errstr, ...) { + va_list ap; + + va_start(ap, errstr); + vfprintf(stderr, errstr, ap); + va_end(ap); + exit(EXIT_FAILURE); +} + +#ifndef HAVE_BSD_AUTH +static const char * +getpw(void) { /* only run as root */ const char *rval; struct passwd *pw; - if(geteuid() != 0) { - fputs("slock: cannot retrieve password entry (make sure to suid slock)\n", stderr); - exit(EXIT_FAILURE); - } pw = getpwuid(getuid()); + if(!pw) + die("slock: cannot retrieve password entry (make sure to suid or sgid slock)"); endpwent(); rval = pw->pw_passwd; @@ -34,82 +58,50 @@ get_password() { /* only run as root */ { struct spwd *sp; sp = getspnam(getenv("USER")); + if(!sp) + die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n"); endspent(); rval = sp->sp_pwdp; } #endif + /* drop privileges */ - if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) { - fputs("slock: cannot drop privileges\n",stdout); - exit(EXIT_FAILURE); - } + if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0) + die("slock: 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 +readpw(Display *dpy) +#else +readpw(Display *dpy, const char *pws) +#endif +{ char buf[32], passwd[256]; int num, screen; - const char *pws; unsigned int len; - Bool running = True; - Cursor invisible; - Display *dpy; KeySym ksym; - Pixmap pmap; - Window root, w; - XColor black, dummy; XEvent ev; - XSetWindowAttributes wa; - if((argc > 1) && !strncmp(argv[1], "-v", 3)) { - fputs("slock-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout); - exit(EXIT_SUCCESS); - } - pws = get_password(); - if(!(dpy = XOpenDisplay(0))) { - fputs("slock: cannot open display\n", stderr); - exit(EXIT_FAILURE); - } - 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); - for(len = 1000; len; len--) { - if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask, - GrabModeAsync, GrabModeSync, 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; - XMapRaised(dpy, w); - XSync(dpy, False); + running = True; - /* main event loop */ - while(running && !XNextEvent(dpy, &ev)) + /* 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. */ + while(running && !XNextEvent(dpy, &ev)) { if(ev.type == KeyPress) { buf[0] = 0; 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)) @@ -117,7 +109,12 @@ main(int argc, char **argv) { switch(ksym) { case XK_Return: passwd[len] = 0; - if((running = strcmp(crypt(passwd, pws), pws)) != 0) +#ifdef HAVE_BSD_AUTH + running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd); +#else + running = strcmp(crypt(passwd, pws), pws); +#endif + if(running != False) XBell(dpy, 100); len = 0; break; @@ -136,9 +133,128 @@ main(int argc, char **argv) { break; } } + else for(screen = 0; screen < nscreens; screen++) + XRaiseWindow(dpy, locks[screen]->win); + } +} + +static void +unlockscreen(Display *dpy, Lock *lock) { + if(dpy == NULL || lock == NULL) + return; + XUngrabPointer(dpy, CurrentTime); - XFreePixmap(dpy, pmap); - XDestroyWindow(dpy, w); + XFreePixmap(dpy, lock->pmap); + XDestroyWindow(dpy, lock->win); + + free(lock); +} + +static Lock * +lockscreen(Display *dpy, int screen) { + char curs[] = {0, 0, 0, 0, 0, 0, 0, 0}; + unsigned int len; + Lock *lock; + XColor black, dummy; + XSetWindowAttributes wa; + Cursor invisible; + + if(dpy == NULL || screen < 0) + return NULL; + + lock = malloc(sizeof(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->win = 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->win, curs, 8, 8); + invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0); + XDefineCursor(dpy, lock->win, invisible); + XMapRaised(dpy, lock->win); + 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 && (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: slock [-v]\n"); + exit(EXIT_FAILURE); +} + +int +main(int argc, char **argv) { +#ifndef HAVE_BSD_AUTH + const char *pws; +#endif + Display *dpy; + int screen; + + if((argc == 2) && !strcmp("-v", argv[1])) + die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION); + else if(argc != 1) + usage(); + + if(!getpwuid(getuid())) + die("slock: no passwd entry for you"); + +#ifndef HAVE_BSD_AUTH + pws = getpw(); +#endif + + if(!(dpy = XOpenDisplay(0))) + die("slock: cannot open display"); + /* Get the number of screens in display "dpy" and blank them all. */ + nscreens = ScreenCount(dpy); + locks = malloc(sizeof(Lock *) * nscreens); + if(locks == NULL) + die("slock: 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 + readpw(dpy); +#else + readpw(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; }