-
/* See LICENSE file for license details. */
#define _XOPEN_SOURCE 500
#if HAVE_SHADOW_H
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
+#include <X11/extensions/Xrandr.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <bsd_auth.h>
#endif
+#include "arg.h"
+#include "util.h"
+
+char *argv0;
+
+enum {
+ INIT,
+ INPUT,
+ FAILED,
+ NUMCOLS
+};
+
#include "config.h"
typedef struct {
int screen;
Window root, win;
Pixmap pmap;
- unsigned long colors[2];
+ unsigned long colors[NUMCOLS];
} Lock;
static Lock **locks;
static int nscreens;
-static Bool running = True;
+static Bool rr;
+static int rrevbase;
+static int rrerrbase;
static void
-die(const char *errstr, ...) {
+die(const char *errstr, ...)
+{
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
- exit(EXIT_FAILURE);
+ exit(1);
}
#ifdef __linux__
#include <fcntl.h>
+#include <linux/oom.h>
static void
-dontkillme(void) {
- int fd;
+dontkillme(void)
+{
+ FILE *f;
+ const char oomfile[] = "/proc/self/oom_score_adj";
- fd = open("/proc/self/oom_score_adj", O_WRONLY);
- if (fd < 0 && errno == ENOENT)
- return;
- if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
- die("cannot disable the out-of-memory killer for this process\n");
+ 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. "
+ "suid or sgid set?\n");
+ else
+ die("slock: fclose %s: %s\n", oomfile,
+ strerror(errno));
+ }
}
#endif
#ifndef HAVE_BSD_AUTH
+/* only run as root */
static const char *
-getpw(void) { /* only run as root */
+getpw(void)
+{
const char *rval;
struct passwd *pw;
errno = 0;
- pw = getpwuid(getuid());
- if (!pw) {
+ if (!(pw = getpwuid(getuid()))) {
if (errno)
- die("slock: getpwuid: %s\n", strerror(errno));
+ die("getpwuid: %s\n", strerror(errno));
else
- die("slock: cannot retrieve password entry (make sure to suid or sgid slock)\n");
+ die("cannot retrieve password entry\n");
}
- rval = pw->pw_passwd;
+ rval = pw->pw_passwd;
#if HAVE_SHADOW_H
if (rval[0] == 'x' && rval[1] == '\0') {
struct spwd *sp;
- sp = getspnam(getenv("USER"));
- if(!sp)
- die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
+ if (!(sp = getspnam(getenv("USER"))))
+ die("cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
rval = sp->sp_pwdp;
}
#endif
/* drop privileges */
- if (geteuid() == 0
- && ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
- die("slock: cannot drop privileges\n");
+ if (geteuid() == 0 &&
+ ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
+ die("cannot drop privileges\n");
return rval;
}
#endif
readpw(Display *dpy, const char *pws)
#endif
{
- char buf[32], passwd[256];
- int num, screen;
- unsigned int len, llen;
+ char buf[32], passwd[256], *encrypted;
+ int num, screen, running, failure;
+ unsigned int len, color;
KeySym ksym;
XEvent ev;
+ static int oldc = INIT;
- len = llen = 0;
- running = True;
+ len = 0;
+ running = 1;
+ failure = 0;
/* 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)
+ 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)
+ 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))
+ if (IsFunctionKey(ksym) ||
+ IsKeypadKey(ksym) ||
+ IsMiscFunctionKey(ksym) ||
+ IsPFKey(ksym) ||
+ IsPrivateKeypadKey(ksym))
continue;
- switch(ksym) {
+ switch (ksym) {
case XK_Return:
passwd[len] = 0;
#ifdef HAVE_BSD_AUTH
- running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
+ running = !auth_userokay(getlogin(), NULL, "auth-slock", passwd);
#else
- running = !!strcmp(crypt(passwd, pws), pws);
+ errno = 0;
+ if (!(encrypted = crypt(passwd, pws)))
+ fprintf(stderr, "slock: crypt: %s\n", strerror(errno));
+ else
+ running = !!strcmp(encrypted, pws);
#endif
- if(running)
+ if (running) {
XBell(dpy, 100);
+ failure = True;
+ }
+ explicit_bzero(&passwd, sizeof(passwd));
len = 0;
break;
case XK_Escape:
+ explicit_bzero(&passwd, sizeof(passwd));
len = 0;
break;
case XK_BackSpace:
- if(len)
- --len;
+ if (len)
+ passwd[len--] = 0;
break;
default:
- if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
+ if (num && !iscntrl((int)buf[0]) && (len + num < sizeof(passwd))) {
memcpy(passwd + len, buf, num);
len += num;
}
break;
}
- if(llen == 0 && len != 0) {
- for(screen = 0; screen < nscreens; screen++) {
- XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
+ color = len ? INPUT : (failure || failonclear ? FAILED : INIT);
+ if (running && oldc != color) {
+ for (screen = 0; screen < nscreens; screen++) {
+ XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]);
XClearWindow(dpy, locks[screen]->win);
}
- } else if(llen != 0 && len == 0) {
- for(screen = 0; screen < nscreens; screen++) {
- XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
+ oldc = color;
+ }
+ } else if (rr && ev.type == rrevbase + RRScreenChangeNotify) {
+ XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
+ for (screen = 0; screen < nscreens; screen++) {
+ if (locks[screen]->win == rre->window) {
+ XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height);
XClearWindow(dpy, locks[screen]->win);
}
}
- llen = len;
- }
- else for(screen = 0; screen < nscreens; screen++)
+ } else for (screen = 0; screen < nscreens; screen++)
XRaiseWindow(dpy, locks[screen]->win);
}
}
static void
-unlockscreen(Display *dpy, Lock *lock) {
+unlockscreen(Display *dpy, Lock *lock)
+{
if(dpy == NULL || lock == NULL)
return;
XUngrabPointer(dpy, CurrentTime);
- XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
+ XUngrabKeyboard(dpy, CurrentTime);
+ XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
XFreePixmap(dpy, lock->pmap);
XDestroyWindow(dpy, lock->win);
free(lock);
}
+static void
+cleanup(Display *dpy)
+{
+ int s;
+
+ for (s = 0; s < nscreens; ++s)
+ unlockscreen(dpy, locks[s]);
+
+ free(locks);
+ XCloseDisplay(dpy);
+}
+
static Lock *
-lockscreen(Display *dpy, int screen) {
+lockscreen(Display *dpy, int screen)
+{
char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
- unsigned int len;
+ int i, ptgrab, kbgrab;
Lock *lock;
XColor color, dummy;
XSetWindowAttributes wa;
Cursor invisible;
- if(dpy == NULL || screen < 0)
- return NULL;
-
- lock = malloc(sizeof(Lock));
- if(lock == NULL)
+ if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(Lock))))
return NULL;
lock->screen = screen;
-
lock->root = RootWindow(dpy, lock->screen);
+ for (i = 0; i < NUMCOLS; i++) {
+ XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
+ lock->colors[i] = color.pixel;
+ }
+
/* init */
wa.override_redirect = 1;
- wa.background_pixel = BlackPixel(dpy, lock->screen);
+ wa.background_pixel = lock->colors[INIT];
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), COLOR2, &color, &dummy);
- lock->colors[1] = color.pixel;
- XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
- lock->colors[0] = color.pixel;
+ 0, DefaultDepth(dpy, lock->screen), CopyFromParent,
+ DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
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);
- 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);
+
+ /* 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);
}
- }
- running &= (len > 0);
- if(!running) {
- unlockscreen(dpy, lock);
- lock = NULL;
+ /* input is grabbed: we can lock the screen */
+ if (ptgrab == GrabSuccess && kbgrab == GrabSuccess) {
+ XMapRaised(dpy, lock->win);
+ if (rr)
+ XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
+
+ XSelectInput(dpy, lock->root, SubstructureNotifyMask);
+ return lock;
+ }
+
+ /* retry on AlreadyGrabbed but fail on other errors */
+ if ((ptgrab != AlreadyGrabbed && ptgrab != GrabSuccess) ||
+ (kbgrab != AlreadyGrabbed && kbgrab != GrabSuccess))
+ break;
+
+ usleep(100000);
}
- else
- XSelectInput(dpy, lock->root, SubstructureNotifyMask);
- return lock;
+ /* 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) {
- fprintf(stderr, "usage: slock [-v]\n");
- exit(EXIT_FAILURE);
+usage(void)
+{
+ die("usage: slock [-v] [cmd [arg ...]]\n");
}
int
const char *pws;
#endif
Display *dpy;
- int screen;
+ int s, nlocks;
- if((argc == 2) && !strcmp("-v", argv[1]))
- die("slock-%s, © 2006-2012 Anselm R Garbe\n", VERSION);
- else if(argc != 1)
+ ARGBEGIN {
+ case 'v':
+ fprintf(stderr, "slock-"VERSION"\n");
+ return 0;
+ default:
usage();
+ } ARGEND
#ifdef __linux__
dontkillme();
#endif
- if(!getpwuid(getuid()))
- die("slock: no passwd entry for you\n");
+ /* Check if the current user has a password entry */
+ errno = 0;
+ if (!getpwuid(getuid())) {
+ if (errno == 0)
+ die("slock: no password entry for current user\n");
+ else
+ die("slock: getpwuid: %s\n", strerror(errno));
+ }
#ifndef HAVE_BSD_AUTH
pws = getpw();
+ if (strlen(pws) < 2)
+ die("slock: failed to get user password hash.\n");
#endif
- if(!(dpy = XOpenDisplay(0)))
+ if (!(dpy = XOpenDisplay(NULL)))
die("slock: cannot open display\n");
- /* Get the number of screens in display "dpy" and blank them all. */
+
+ /* check for Xrandr support */
+ rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
+
+ /* get number of screens in display "dpy" and blank them */
nscreens = ScreenCount(dpy);
- locks = malloc(sizeof(Lock *) * nscreens);
- if(locks == NULL)
- die("slock: malloc: %s\n", strerror(errno));
- int nlocks = 0;
- for(screen = 0; screen < nscreens; screen++) {
- if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
+ if (!(locks = calloc(nscreens, sizeof(Lock *)))) {
+ XCloseDisplay(dpy);
+ die("slock: out of memory\n");
+ }
+ for (nlocks = 0, s = 0; s < nscreens; s++) {
+ if ((locks[s] = lockscreen(dpy, s)) != NULL)
nlocks++;
+ else
+ break;
}
- XSync(dpy, False);
+ XSync(dpy, 0);
- /* Did we actually manage to lock something? */
- if (nlocks == 0) { // nothing to protect
- free(locks);
- XCloseDisplay(dpy);
+ /* did we manage to lock everything? */
+ if (nlocks != nscreens) {
+ cleanup(dpy);
return 1;
}
- /* Everything is now blank. Now wait for the correct password. */
+ /* run post-lock command */
+ if (argc > 0) {
+ switch (fork()) {
+ case -1:
+ cleanup(dpy);
+ 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 */
#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);
+ /* password ok, unlock everything and quit */
+ cleanup(dpy);
return 0;
}
projects / slock.git / blobdiff