applied Dimitris' style patch from Dec'14, with some minor modifications
This commit is contained in:
Anselm R Garbe
parent
66e31556db
commit
a31b919111
106
slock.c
106
slock.c
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@ -1,4 +1,3 @@
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/* See LICENSE file for license details. */
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#define _XOPEN_SOURCE 500
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#if HAVE_SHADOW_H
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@ -37,20 +36,22 @@ static int nscreens;
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static Bool running = True;
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static void
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die(const char *errstr, ...) {
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die(const char *errstr, ...)
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{
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va_list ap;
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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exit(1);
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}
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#ifdef __linux__
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#include <fcntl.h>
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static void
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dontkillme(void) {
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dontkillme(void)
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{
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int fd;
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fd = open("/proc/self/oom_score_adj", O_WRONLY);
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@ -62,8 +63,10 @@ dontkillme(void) {
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#endif
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#ifndef HAVE_BSD_AUTH
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/* only run as root */
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static const char *
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getpw(void) { /* only run as root */
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getpw(void)
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{
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const char *rval;
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struct passwd *pw;
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@ -73,7 +76,7 @@ getpw(void) { /* only run as root */
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if (errno)
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die("slock: getpwuid: %s\n", strerror(errno));
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else
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die("slock: cannot retrieve password entry (make sure to suid or sgid slock)\n");
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die("slock: cannot retrieve password entry\n");
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}
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rval = pw->pw_passwd;
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@ -81,15 +84,15 @@ getpw(void) { /* only run as root */
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if (rval[0] == 'x' && rval[1] == '\0') {
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struct spwd *sp;
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sp = getspnam(getenv("USER"));
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if(!sp)
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if (!sp)
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die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
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rval = sp->sp_pwdp;
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}
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#endif
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/* drop privileges */
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if (geteuid() == 0
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&& ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
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if (geteuid() == 0 &&
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((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
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die("slock: cannot drop privileges\n");
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return rval;
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}
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@ -115,21 +118,23 @@ readpw(Display *dpy, const char *pws)
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* had been removed and you can set it with "xset" or some other
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* utility. This way the user can easily set a customized DPMS
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* timeout. */
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while(running && !XNextEvent(dpy, &ev)) {
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if(ev.type == KeyPress) {
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while (running && !XNextEvent(dpy, &ev)) {
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if (ev.type == KeyPress) {
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buf[0] = 0;
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num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
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if(IsKeypadKey(ksym)) {
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if(ksym == XK_KP_Enter)
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if (IsKeypadKey(ksym)) {
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if (ksym == XK_KP_Enter)
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ksym = XK_Return;
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else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
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else if (ksym >= XK_KP_0 && ksym <= XK_KP_9)
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ksym = (ksym - XK_KP_0) + XK_0;
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}
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if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
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|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
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|| IsPrivateKeypadKey(ksym))
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if (IsFunctionKey(ksym) ||
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IsKeypadKey(ksym) ||
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IsMiscFunctionKey(ksym) ||
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IsPFKey(ksym) ||
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IsPrivateKeypadKey(ksym))
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continue;
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switch(ksym) {
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switch (ksym) {
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case XK_Return:
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passwd[len] = 0;
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#ifdef HAVE_BSD_AUTH
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@ -137,7 +142,7 @@ readpw(Display *dpy, const char *pws)
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#else
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running = !!strcmp(crypt(passwd, pws), pws);
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#endif
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if(running)
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if (running)
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XBell(dpy, 100);
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len = 0;
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break;
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@ -145,36 +150,37 @@ readpw(Display *dpy, const char *pws)
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len = 0;
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break;
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case XK_BackSpace:
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if(len)
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if (len)
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--len;
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break;
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default:
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if(num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
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if (num && !iscntrl((int) buf[0]) && (len + num < sizeof passwd)) {
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memcpy(passwd + len, buf, num);
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len += num;
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}
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break;
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}
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if(llen == 0 && len != 0) {
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for(screen = 0; screen < nscreens; screen++) {
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if (llen == 0 && len != 0) {
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for (screen = 0; screen < nscreens; screen++) {
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XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
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XClearWindow(dpy, locks[screen]->win);
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}
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} else if(llen != 0 && len == 0) {
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for(screen = 0; screen < nscreens; screen++) {
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} else if (llen != 0 && len == 0) {
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for (screen = 0; screen < nscreens; screen++) {
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XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
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XClearWindow(dpy, locks[screen]->win);
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}
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}
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llen = len;
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}
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else for(screen = 0; screen < nscreens; screen++)
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else for (screen = 0; screen < nscreens; screen++)
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XRaiseWindow(dpy, locks[screen]->win);
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}
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}
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static void
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unlockscreen(Display *dpy, Lock *lock) {
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unlockscreen(Display *dpy, Lock *lock)
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{
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if(dpy == NULL || lock == NULL)
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return;
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@ -187,7 +193,8 @@ unlockscreen(Display *dpy, Lock *lock) {
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}
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static Lock *
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lockscreen(Display *dpy, int screen) {
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lockscreen(Display *dpy, int screen)
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{
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char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
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unsigned int len;
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Lock *lock;
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@ -195,11 +202,11 @@ lockscreen(Display *dpy, int screen) {
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XSetWindowAttributes wa;
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Cursor invisible;
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if(dpy == NULL || screen < 0)
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if (dpy == NULL || screen < 0)
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return NULL;
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lock = malloc(sizeof(Lock));
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if(lock == NULL)
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if (lock == NULL)
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return NULL;
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lock->screen = screen;
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@ -220,36 +227,37 @@ lockscreen(Display *dpy, int screen) {
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invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
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XDefineCursor(dpy, lock->win, invisible);
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XMapRaised(dpy, lock->win);
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for(len = 1000; len; len--) {
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if(XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
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for (len = 1000; len; len--) {
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if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
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GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
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break;
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usleep(1000);
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}
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if(running && (len > 0)) {
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for(len = 1000; len; len--) {
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if(XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
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== GrabSuccess)
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if (running && (len > 0)) {
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for (len = 1000; len; len--) {
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if (XGrabKeyboard(dpy, lock->root, True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
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break;
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usleep(1000);
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}
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}
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running &= (len > 0);
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if(!running) {
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if (!running) {
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unlockscreen(dpy, lock);
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lock = NULL;
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}
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else
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else {
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XSelectInput(dpy, lock->root, SubstructureNotifyMask);
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}
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return lock;
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}
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static void
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usage(void) {
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usage(void)
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{
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fprintf(stderr, "usage: slock [-v]\n");
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exit(EXIT_FAILURE);
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exit(1);
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}
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int
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@ -260,38 +268,38 @@ main(int argc, char **argv) {
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Display *dpy;
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int screen;
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if((argc == 2) && !strcmp("-v", argv[1]))
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die("slock-%s, © 2006-2014 slock engineers\n", VERSION);
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else if(argc != 1)
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if ((argc == 2) && !strcmp("-v", argv[1]))
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die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
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else if (argc != 1)
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usage();
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#ifdef __linux__
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dontkillme();
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#endif
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if(!getpwuid(getuid()))
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if (!getpwuid(getuid()))
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die("slock: no passwd entry for you\n");
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#ifndef HAVE_BSD_AUTH
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pws = getpw();
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#endif
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if(!(dpy = XOpenDisplay(0)))
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if (!(dpy = XOpenDisplay(0)))
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die("slock: cannot open display\n");
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/* Get the number of screens in display "dpy" and blank them all. */
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nscreens = ScreenCount(dpy);
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locks = malloc(sizeof(Lock *) * nscreens);
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if(locks == NULL)
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if (locks == NULL)
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die("slock: malloc: %s\n", strerror(errno));
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int nlocks = 0;
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for(screen = 0; screen < nscreens; screen++) {
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for (screen = 0; screen < nscreens; screen++) {
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if ( (locks[screen] = lockscreen(dpy, screen)) != NULL)
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nlocks++;
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}
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XSync(dpy, False);
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/* Did we actually manage to lock something? */
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if (nlocks == 0) { // nothing to protect
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if (nlocks == 0) { /* nothing to protect */
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free(locks);
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XCloseDisplay(dpy);
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return 1;
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@ -305,7 +313,7 @@ main(int argc, char **argv) {
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#endif
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/* Password ok, unlock everything and quit. */
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for(screen = 0; screen < nscreens; screen++)
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for (screen = 0; screen < nscreens; screen++)
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unlockscreen(dpy, locks[screen]);
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free(locks);
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