303 lines
6.7 KiB
C
303 lines
6.7 KiB
C
|
|
/* See LICENSE file for license details. */
|
|
#define _XOPEN_SOURCE 500
|
|
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <X11/keysym.h>
|
|
#include <X11/Xlib.h>
|
|
#include <X11/Xutil.h>
|
|
|
|
#define PWD_MAX_LEN 100
|
|
|
|
#define COLOR1 "#00FF00"
|
|
#define COLOR2 "#FF0000"
|
|
#define VERSION "42.1337"
|
|
|
|
typedef struct {
|
|
int screen;
|
|
Window root, win;
|
|
Pixmap pmap;
|
|
unsigned long colors[2];
|
|
} 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);
|
|
}
|
|
|
|
#ifdef __linux__
|
|
#include <fcntl.h>
|
|
static void
|
|
dontkillme(void) {
|
|
int fd;
|
|
|
|
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");
|
|
}
|
|
#endif
|
|
|
|
char *
|
|
getpw(void) {
|
|
FILE *pwd_file;
|
|
char *pwd;
|
|
|
|
if(!(pwd = malloc(PWD_MAX_LEN * sizeof(*pwd)))) {
|
|
die("could not malloc memory");
|
|
}
|
|
|
|
#define PWD_FILE "/home/frank/Private/.lock_pwd"
|
|
pwd_file = fopen(PWD_FILE, "r");
|
|
if(!pwd_file) {
|
|
die("Could not open "PWD_FILE" for reading\n");
|
|
}
|
|
|
|
fgets(pwd, PWD_MAX_LEN, pwd_file);
|
|
if(pwd[strlen(pwd)-1] == '\n')
|
|
pwd[strlen(pwd)-1] = '\0';
|
|
if(strlen(pwd) <= 1) {
|
|
die("Password seems to short: %s\n", pwd);
|
|
}
|
|
fclose(pwd_file);
|
|
|
|
return pwd;
|
|
|
|
}
|
|
|
|
static void
|
|
readpw(Display *dpy, char *pws)
|
|
{
|
|
char buf[32], passwd[256];
|
|
int num, screen;
|
|
unsigned int len, llen;
|
|
KeySym ksym;
|
|
XEvent ev;
|
|
|
|
len = llen = 0;
|
|
running = True;
|
|
|
|
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))
|
|
continue;
|
|
|
|
switch(ksym) {
|
|
case XK_Return:
|
|
passwd[len] = '\0';
|
|
running = !!strcmp(passwd, pws);
|
|
if(running)
|
|
XBell(dpy, 100);
|
|
len = 0;
|
|
break;
|
|
case XK_Escape:
|
|
len = 0;
|
|
break;
|
|
case XK_BackSpace:
|
|
if(len)
|
|
--len;
|
|
break;
|
|
default:
|
|
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]);
|
|
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]);
|
|
XClearWindow(dpy, locks[screen]->win);
|
|
}
|
|
}
|
|
llen = len;
|
|
}
|
|
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);
|
|
XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
|
|
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 color, 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), COLOR2,
|
|
&color, &dummy);
|
|
lock->colors[1] = color.pixel;
|
|
|
|
XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1,
|
|
&color, &dummy);
|
|
lock->colors[0] = color.pixel;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
running &= (len > 0);
|
|
if(!running) {
|
|
unlockscreen(dpy, lock);
|
|
lock = NULL;
|
|
}
|
|
else
|
|
XSelectInput(dpy, lock->root, SubstructureNotifyMask);
|
|
|
|
return lock;
|
|
}
|
|
|
|
static void
|
|
usage(void) {
|
|
fprintf(stderr, "usage: slock [-v]\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv) {
|
|
char *pws;
|
|
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();
|
|
|
|
#ifdef __linux__
|
|
//dontkillme();
|
|
#endif
|
|
|
|
pws = getpw();
|
|
|
|
if(!(dpy = XOpenDisplay(0)))
|
|
die("slock: cannot open display\n");
|
|
|
|
/* 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\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;
|
|
}
|
|
|
|
/* Everything is now blank. Now wait for the correct password. */
|
|
readpw(dpy, pws);
|
|
|
|
/* Password ok, unlock everything and quit. */
|
|
for(screen = 0; screen < nscreens; screen++)
|
|
unlockscreen(dpy, locks[screen]);
|
|
|
|
free(locks);
|
|
free(pws);
|
|
XCloseDisplay(dpy);
|
|
|
|
return 0;
|
|
}
|