#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
+enum {
+ INIT,
+ INPUT,
+ FAILED,
+ NUMCOLS
+};
+
+#include "config.h"
+
typedef struct {
int screen;
Window root, win;
Pixmap pmap;
+ unsigned long colors[NUMCOLS];
} Lock;
static Lock **locks;
static int nscreens;
static Bool running = True;
+static Bool failure = False;
+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;
+ int length;
+ char value[64];
+
+ fd = open("/proc/self/oom_score_adj", O_WRONLY);
+ if (fd < 0 && errno == ENOENT)
+ return;
+
+ /* convert OOM_SCORE_ADJ_MIN to string for writing */
+ length = snprintf(value, sizeof(value), "%d\n", OOM_SCORE_ADJ_MIN);
+
+ /* bail on truncation */
+ if (length >= sizeof(value))
+ die("buffer too small\n");
+
+ if (fd < 0 || write(fd, value, length) != length || close(fd) != 0)
+ die("cannot disable the out-of-memory killer for this process (make sure to suid or sgid slock)\n");
+}
+#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;
- pw = getpwuid(getuid());
- if(!pw)
- die("slock: cannot retrieve password entry (make sure to suid or sgid slock)");
- endpwent();
- rval = pw->pw_passwd;
+ errno = 0;
+ if (!(pw = getpwuid(getuid()))) {
+ if (errno)
+ die("slock: getpwuid: %s\n", strerror(errno));
+ else
+ die("slock: cannot retrieve password entry\n");
+ }
+ rval = pw->pw_passwd;
#if HAVE_SHADOW_H
- {
+ if (rval[0] == 'x' && rval[1] == '\0') {
struct spwd *sp;
- sp = getspnam(getenv("USER"));
- if(!sp)
+ if (!(sp = getspnam(getenv("USER"))))
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)
- die("slock: cannot 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");
return rval;
}
#endif
{
char buf[32], passwd[256];
int num, screen;
- unsigned int len;
+ unsigned int len, color;
KeySym ksym;
XEvent ev;
+ static int oldc = INIT;
len = 0;
running = True;
* 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) {
+ 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)
+ 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);
#else
- running = strcmp(crypt(passwd, pws), pws);
+ running = !!strcmp(crypt(passwd, pws), pws);
#endif
- if(running != False)
+ if (running) {
XBell(dpy, 100);
+ failure = True;
+ }
len = 0;
break;
case XK_Escape:
len = 0;
break;
case XK_BackSpace:
- if(len)
+ if (len)
--len;
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;
}
- }
- else for(screen = 0; screen < nscreens; screen++)
+ 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);
+ }
+ 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);
+ }
+ }
+ } 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, NUMCOLS, 0);
XFreePixmap(dpy, lock->pmap);
XDestroyWindow(dpy, lock->win);
}
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;
Lock *lock;
- XColor black, dummy;
+ XColor color, dummy;
XSetWindowAttributes wa;
Cursor invisible;
- if(dpy == NULL || screen < 0)
- return NULL;
-
- lock = malloc(sizeof(Lock));
- if(lock == NULL)
+ if (!running || 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), "black", &black, &dummy);
+ 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, &black, &black, 0, 0);
+ 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)
+ 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)
break;
usleep(1000);
}
- if(running && (len > 0)) {
- for(len = 1000; len; len--) {
- if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
- == GrabSuccess)
- break;
+ if (!len) {
+ 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);
}
- running = (len > 0);
- }
-
- if(!running) {
- unlockscreen(dpy, lock);
- lock = NULL;
+ fprintf(stderr, "slock: unable to grab keyboard for screen %d\n", screen);
}
-
- return lock;
+ /* grabbing one of the inputs failed */
+ running = 0;
+ unlockscreen(dpy, lock);
+ return NULL;
}
static void
-usage(void) {
- fprintf(stderr, "usage: slock [-v]");
- exit(EXIT_FAILURE);
+usage(void)
+{
+ fprintf(stderr, "usage: slock [-v|POST_LOCK_CMD]\n");
+ exit(1);
}
int
Display *dpy;
int screen;
- if((argc == 2) && !strcmp("-v", argv[1]))
- die("slock-%s, © 2006-2012 Anselm R Garbe", VERSION);
- else if(argc != 1)
+ if ((argc == 2) && !strcmp("-v", argv[1]))
+ die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
+
+ if ((argc == 2) && !strcmp("-h", argv[1]))
usage();
- if(!getpwuid(getuid()))
- die("slock: no passwd entry for you");
+#ifdef __linux__
+ dontkillme();
+#endif
+
+ if (!getpwuid(getuid()))
+ die("slock: no passwd entry for you\n");
#ifndef HAVE_BSD_AUTH
pws = getpw();
#endif
- if(!(dpy = XOpenDisplay(0)))
- die("slock: cannot open display");
+ if (!(dpy = XOpenDisplay(0)))
+ die("slock: cannot open display\n");
+ rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
/* 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);
+ if (!(locks = malloc(sizeof(Lock*) * nscreens)))
+ die("slock: malloc: %s\n", strerror(errno));
+ int nlocks = 0;
+ for (screen = 0; screen < nscreens; screen++) {
+ if ((locks[screen] = lockscreen(dpy, screen)) != NULL)
+ nlocks++;
+ }
XSync(dpy, False);
+ /* Did we actually manage to lock something? */
+ if (nlocks == 0) { /* nothing to protect */
+ free(locks);
+ XCloseDisplay(dpy);
+ return 1;
+ }
+
+ if (argc >= 2 && fork() == 0) {
+ if (dpy)
+ close(ConnectionNumber(dpy));
+ execvp(argv[1], argv+1);
+ die("slock: execvp %s failed: %s\n", argv[1], strerror(errno));
+ }
+
/* Everything is now blank. Now wait for the correct password. */
#ifdef HAVE_BSD_AUTH
readpw(dpy);
#endif
/* Password ok, unlock everything and quit. */
- for(screen = 0; screen < nscreens; screen++)
+ for (screen = 0; screen < nscreens; screen++)
unlockscreen(dpy, locks[screen]);
free(locks);
projects / slock.git / blobdiff