X-Git-Url: https://git.xinqibao.xyz/slock.git/blobdiff_plain/732d2b3bf5da3a1883b3246062aa556a59b8517c..5d433c7cf509daf064b2a0412ed6cf3c0068afde:/slock.c
diff --git a/slock.c b/slock.c
index eece4e3..5f183a2 100644
--- a/slock.c
+++ b/slock.c
@@ -22,37 +22,35 @@
#include <bsd_auth.h>
#endif
-struct st_lock {
+typedef struct {
int screen;
- Window root, w;
+ Window root, win;
Pixmap pmap;
-};
+} Lock;
-extern const char *__progname;
+static Lock **locks;
+static int nscreens;
+static Bool running = True;
static void
die(const char *errstr, ...) {
va_list ap;
- fprintf(stderr, "%s: ", __progname);
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
- fprintf(stderr, "\n");
- fflush(stderr);
-
exit(EXIT_FAILURE);
}
#ifndef HAVE_BSD_AUTH
static const char *
-get_password(void) { /* only run as root */
+getpw(void) { /* only run as root */
const char *rval;
struct passwd *pw;
- if(geteuid() != 0)
- die("cannot retrieve password entry (make sure to suid slock)");
pw = getpwuid(getuid());
+ if(!pw)
+ die("slock: cannot retrieve password entry (make sure to suid or sgid slock)");
endpwent();
rval = pw->pw_passwd;
@@ -60,6 +58,8 @@ get_password(void) { /* 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;
}
@@ -67,23 +67,21 @@ get_password(void) { /* only run as root */
/* drop privileges */
if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
- die("cannot drop privileges");
+ die("slock: cannot drop privileges");
return rval;
}
#endif
static void
#ifdef HAVE_BSD_AUTH
-read_password(Display *dpy)
+readpw(Display *dpy)
#else
-read_password(Display *dpy, const char *pws)
+readpw(Display *dpy, const char *pws)
#endif
{
char buf[32], passwd[256];
- int num;
-
+ int num, screen;
unsigned int len;
- Bool running = True;
KeySym ksym;
XEvent ev;
@@ -94,7 +92,6 @@ read_password(Display *dpy, const char *pws)
* 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;
@@ -117,7 +114,7 @@ read_password(Display *dpy, const char *pws)
#else
running = strcmp(crypt(passwd, pws), pws);
#endif
- if (running != 0)
+ if(running != False)
XBell(dpy, 100);
len = 0;
break;
@@ -136,36 +133,37 @@ read_password(Display *dpy, const char *pws)
break;
}
}
+ else for(screen = 0; screen < nscreens; screen++)
+ XRaiseWindow(dpy, locks[screen]->win);
}
}
static void
-unlockscreen(Display *dpy, struct st_lock *lock) {
- if (dpy == NULL || lock == NULL)
+unlockscreen(Display *dpy, Lock *lock) {
+ if(dpy == NULL || lock == NULL)
return;
XUngrabPointer(dpy, CurrentTime);
XFreePixmap(dpy, lock->pmap);
- XDestroyWindow(dpy, lock->w);
+ XDestroyWindow(dpy, lock->win);
free(lock);
}
-static struct st_lock *
+static Lock *
lockscreen(Display *dpy, int screen) {
char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
unsigned int len;
- struct st_lock *lock;
- Bool running = True;
+ Lock *lock;
XColor black, dummy;
XSetWindowAttributes wa;
Cursor invisible;
- if (dpy == NULL || screen < 0)
+ if(dpy == NULL || screen < 0)
return NULL;
- lock = malloc(sizeof(struct st_lock));
- if (lock == NULL)
+ lock = malloc(sizeof(Lock));
+ if(lock == NULL)
return NULL;
lock->screen = screen;
@@ -175,21 +173,21 @@ lockscreen(Display *dpy, int screen) {
/* init */
wa.override_redirect = 1;
wa.background_pixel = BlackPixel(dpy, lock->screen);
- lock->w = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(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->w, curs, 8, 8);
+ lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &black, &black, 0, 0);
- XDefineCursor(dpy, lock->w, invisible);
- XMapRaised(dpy, lock->w);
+ 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 = running && (len > 0))) {
+ if(running && (len > 0)) {
for(len = 1000; len; len--) {
if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
== GrabSuccess)
@@ -199,7 +197,7 @@ lockscreen(Display *dpy, int screen) {
running = (len > 0);
}
- if (!running) {
+ if(!running) {
unlockscreen(dpy, lock);
lock = NULL;
}
@@ -209,7 +207,7 @@ lockscreen(Display *dpy, int screen) {
static void
usage(void) {
- fprintf(stderr, "usage: %s -v", __progname);
+ fprintf(stderr, "usage: slock [-v]");
exit(EXIT_FAILURE);
}
@@ -219,46 +217,43 @@ main(int argc, char **argv) {
const char *pws;
#endif
Display *dpy;
- int nscreens, screen;
-
- struct st_lock **locks;
+ int screen;
if((argc == 2) && !strcmp("-v", argv[1]))
- die("slock-%s, © 2006-2008 Anselm R Garbe", VERSION);
+ die("slock-%s, © 2006-2012 Anselm R Garbe", VERSION);
else if(argc != 1)
usage();
+ if(!getpwuid(getuid()))
+ die("slock: no passwd entry for you");
+
#ifndef HAVE_BSD_AUTH
- pws = get_password();
+ pws = getpw();
#endif
if(!(dpy = XOpenDisplay(0)))
- die("cannot open display");
-
+ die("slock: cannot open display");
/* Get the number of screens in display "dpy" and blank them all. */
nscreens = ScreenCount(dpy);
- locks = malloc(sizeof(struct st_lock *) * nscreens);
- if (locks == NULL)
- die("malloc: %s", strerror(errno));
-
- for (screen = 0; screen < nscreens; screen++)
+ 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
- read_password(dpy);
+ readpw(dpy);
#else
- read_password(dpy, pws);
+ readpw(dpy, pws);
#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);
-
XCloseDisplay(dpy);
return 0;