#include <bsd_auth.h>
#endif
+#include "arg.h"
+#include "util.h"
+
+char *argv0;
+
enum {
INIT,
INPUT,
static Lock **locks;
static int nscreens;
-static Bool running = True;
-static Bool failure = False;
static Bool rr;
static int rrevbase;
static int rrerrbase;
{
va_list ap;
- fputs("slock: ", stderr);
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
#ifdef __linux__
#include <fcntl.h>
+#include <linux/oom.h>
static void
dontkillme(void)
{
- int fd;
+ 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 (!(f = fopen(oomfile, "w"))) {
+ if (errno == ENOENT)
+ return;
+ die("slock: fopen %s: %s\n", oomfile, strerror(errno));
}
- if (fd < 0 || write(fd, "-1000\n", (sizeof("-1000\n") - 1)) !=
- (sizeof("-1000\n") - 1) || close(fd) != 0) {
- die("can't tame the oom-killer. is suid or sgid set?\n");
+ 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
readpw(Display *dpy, const char *pws)
#endif
{
- char buf[32], passwd[256];
- int num, screen;
+ char buf[32], passwd[256], *encrypted;
+ int num, screen, running, failure;
unsigned int len, color;
KeySym ksym;
XEvent ev;
static int oldc = INIT;
len = 0;
- running = True;
+ 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
* timeout. */
while (running && !XNextEvent(dpy, &ev)) {
if (ev.type == KeyPress) {
- buf[0] = 0;
+ explicit_bzero(&buf, sizeof(buf));
num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
if (IsKeypadKey(ksym)) {
if (ksym == XK_KP_Enter)
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) {
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;
+ passwd[len--] = 0;
break;
default:
if (num && !iscntrl((int)buf[0]) && (len + num < sizeof(passwd))) {
return;
XUngrabPointer(dpy, CurrentTime);
+ 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)
{
char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
- unsigned int len;
- int i;
+ int i, ptgrab, kbgrab;
Lock *lock;
XColor color, dummy;
XSetWindowAttributes wa;
Cursor invisible;
- if (!running || dpy == NULL || screen < 0 || !(lock = malloc(sizeof(Lock))))
+ if (dpy == NULL || screen < 0 || !(lock = malloc(sizeof(Lock))))
return NULL;
lock->screen = screen;
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);
- if (rr)
- XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
-
- /* Try to grab mouse pointer *and* keyboard, else fail the lock */
- for (len = 1000; len; len--) {
- if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
- GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
+
+ /* 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)
+ 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(1000);
+
+ usleep(100000);
}
- if (!len) {
+
+ /* we couldn't grab all input: fail out */
+ if (ptgrab != GrabSuccess)
fprintf(stderr, "slock: unable to grab mouse pointer for screen %d\n", screen);
- } else {
- for (len = 1000; len; len--) {
- if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) {
- /* everything fine, we grabbed both inputs */
- XSelectInput(dpy, lock->root, SubstructureNotifyMask);
- return lock;
- }
- usleep(1000);
- }
+ if (kbgrab != GrabSuccess)
fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen);
- }
- /* grabbing one of the inputs failed */
- running = 0;
- unlockscreen(dpy, lock);
return NULL;
}
static void
usage(void)
{
- fprintf(stderr, "usage: slock [-v|POST_LOCK_CMD]\n");
- exit(1);
+ 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("version %s, © 2006-2016 slock engineers\n", VERSION);
-
- /* treat first argument starting with a '-' as option */
- if ((argc >= 2) && argv[1][0] == '-')
+ ARGBEGIN {
+ case 'v':
+ fprintf(stderr, "slock-"VERSION"\n");
+ return 0;
+ default:
usage();
+ } ARGEND
#ifdef __linux__
dontkillme();
#endif
- if (!getpwuid(getuid()))
- die("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)))
- die("cannot open display\n");
+ if (!(dpy = XOpenDisplay(NULL)))
+ die("slock: cannot open display\n");
+
+ /* check for Xrandr support */
rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
- /* Get the number of screens in display "dpy" and blank them all. */
+
+ /* get number of screens in display "dpy" and blank them */
nscreens = ScreenCount(dpy);
- if (!(locks = malloc(sizeof(Lock*) * nscreens)))
- die("Out of memory.\n");
- 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;
}
- if (argc >= 2 && fork() == 0) {
- if (dpy)
- close(ConnectionNumber(dpy));
- execvp(argv[1], argv+1);
- die("execvp %s failed: %s\n", argv[1], strerror(errno));
+ /* 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. Now wait for the correct password. */
+ /* 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