applied Dimitris' style patch from Dec'14, with some minor modifications - slock - simple X display locker utility
(HTM) git clone git://git.suckless.org/slock
(DIR) Log
(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit a31b9191111572dafaa8366415b89a4472aa4626
(DIR) parent 66e31556db4921b5f24ced47dae5e1c7ea3bd150
(HTM) Author: Anselm R Garbe <garbeam@gmail.com>
Date: Tue, 27 Jan 2015 22:16:52 +0100
applied Dimitris' style patch from Dec'14, with some minor modifications
Diffstat:
M slock.c | 112 +++++++++++++++++--------------
1 file changed, 60 insertions(+), 52 deletions(-)
---
(DIR) diff --git a/slock.c b/slock.c
@@ -1,4 +1,3 @@
-
/* See LICENSE file for license details. */
#define _XOPEN_SOURCE 500
#if HAVE_SHADOW_H
@@ -37,20 +36,22 @@ static int nscreens;
static Bool running = True;
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>
static void
-dontkillme(void) {
+dontkillme(void)
+{
int fd;
fd = open("/proc/self/oom_score_adj", O_WRONLY);
@@ -62,8 +63,10 @@ dontkillme(void) {
#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;
@@ -73,7 +76,7 @@ getpw(void) { /* only run as root */
if (errno)
die("slock: getpwuid: %s\n", strerror(errno));
else
- die("slock: cannot retrieve password entry (make sure to suid or sgid slock)\n");
+ die("slock: cannot retrieve password entry\n");
}
rval = pw->pw_passwd;
@@ -81,15 +84,15 @@ getpw(void) { /* only run as root */
if (rval[0] == 'x' && rval[1] == '\0') {
struct spwd *sp;
sp = getspnam(getenv("USER"));
- if(!sp)
+ if (!sp)
die("slock: cannot retrieve shadow entry (make sure to suid or sgid slock)\n");
rval = sp->sp_pwdp;
}
#endif
/* drop privileges */
- if (geteuid() == 0
- && ((getegid() != pw->pw_gid && setgid(pw->pw_gid) < 0) || setuid(pw->pw_uid) < 0))
+ 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;
}
@@ -115,21 +118,23 @@ readpw(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) {
+ 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)
+ 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
@@ -137,7 +142,7 @@ readpw(Display *dpy, const char *pws)
#else
running = !!strcmp(crypt(passwd, pws), pws);
#endif
- if(running)
+ if (running)
XBell(dpy, 100);
len = 0;
break;
@@ -145,36 +150,37 @@ readpw(Display *dpy, const char *pws)
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;
}
- if(llen == 0 && len != 0) {
- for(screen = 0; screen < nscreens; screen++) {
+ 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++) {
+ } 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++)
+ 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;
@@ -187,7 +193,8 @@ unlockscreen(Display *dpy, Lock *lock) {
}
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;
Lock *lock;
@@ -195,11 +202,11 @@ lockscreen(Display *dpy, int screen) {
XSetWindowAttributes wa;
Cursor invisible;
- if(dpy == NULL || screen < 0)
+ if (dpy == NULL || screen < 0)
return NULL;
lock = malloc(sizeof(Lock));
- if(lock == NULL)
+ if (lock == NULL)
return NULL;
lock->screen = screen;
@@ -210,8 +217,8 @@ lockscreen(Display *dpy, int screen) {
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);
+ 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);
@@ -220,36 +227,37 @@ lockscreen(Display *dpy, int screen) {
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)
+ 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)
+ 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) {
+ if (!running) {
unlockscreen(dpy, lock);
lock = NULL;
}
- else
+ else {
XSelectInput(dpy, lock->root, SubstructureNotifyMask);
+ }
return lock;
}
static void
-usage(void) {
+usage(void)
+{
fprintf(stderr, "usage: slock [-v]\n");
- exit(EXIT_FAILURE);
+ exit(1);
}
int
@@ -260,38 +268,38 @@ main(int argc, char **argv) {
Display *dpy;
int screen;
- if((argc == 2) && !strcmp("-v", argv[1]))
- die("slock-%s, © 2006-2014 slock engineers\n", VERSION);
- else if(argc != 1)
+ if ((argc == 2) && !strcmp("-v", argv[1]))
+ die("slock-%s, © 2006-2015 slock engineers\n", VERSION);
+ else if (argc != 1)
usage();
#ifdef __linux__
dontkillme();
#endif
- if(!getpwuid(getuid()))
+ if (!getpwuid(getuid()))
die("slock: no passwd entry for you\n");
#ifndef HAVE_BSD_AUTH
pws = getpw();
#endif
- if(!(dpy = XOpenDisplay(0)))
+ 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)
+ if (locks == NULL)
die("slock: malloc: %s\n", strerror(errno));
int nlocks = 0;
- for(screen = 0; screen < nscreens; screen++) {
+ 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
+ if (nlocks == 0) { /* nothing to protect */
free(locks);
XCloseDisplay(dpy);
return 1;
@@ -305,7 +313,7 @@ main(int argc, char **argv) {
#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);