Initial import of i3lock 0.9

1 files changed, 174 insertions, 0 deletions

diff --git a/i3lock.c b/i3lock.c
new file mode 100644
index 0000000..a729716
--- /dev/null
+++ b/i3lock.c
@@ -0,0 +1,174 @@
+/* See LICENSE file for license details. */
+#define _XOPEN_SOURCE 500
+#if HAVE_SHADOW_H
+#include <shadow.h>
+#endif
+
+#include <ctype.h>
+#include <pwd.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>
+
+#if HAVE_BSD_AUTH
+#include <login_cap.h>
+#include <bsd_auth.h>
+#endif
+
+static void
+die(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
+#ifndef HAVE_BSD_AUTH
+static const char *
+get_password() { /* only run as root */
+	const char *rval;
+	struct passwd *pw;
+
+	if(geteuid() != 0)
+		die("slock: cannot retrieve password entry (make sure to suid slock)\n");
+	pw = getpwuid(getuid());
+	endpwent();
+	rval =  pw->pw_passwd;
+
+#if HAVE_SHADOW_H
+	{
+		struct spwd *sp;
+		sp = getspnam(getenv("USER"));
+		endspent();
+		rval = sp->sp_pwdp;
+	}
+#endif
+
+	/* drop privileges */
+	if(setgid(pw->pw_gid) < 0 || setuid(pw->pw_uid) < 0)
+		die("slock: cannot drop privileges\n");
+	return rval;
+}
+#endif
+
+int
+main(int argc, char **argv) {
+	char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
+	char buf[32], passwd[256];
+	int num, screen;
+
+#ifndef HAVE_BSD_AUTH
+	const char *pws;
+#endif
+	unsigned int len;
+	Bool running = True;
+	Cursor invisible;
+	Display *dpy;
+	KeySym ksym;
+	Pixmap pmap;
+	Window root, w;
+	XColor black, dummy;
+	XEvent ev;
+	XSetWindowAttributes wa;
+
+	if((argc == 2) && !strcmp("-v", argv[1]))
+		die("slock-"VERSION", © 2006-2008 Anselm R Garbe\n");
+	else if(argc != 1)
+		die("usage: slock [-v]\n");
+
+#ifndef HAVE_BSD_AUTH
+	pws = get_password();
+#endif
+
+	if(!(dpy = XOpenDisplay(0)))
+		die("slock: cannot open display\n");
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+
+	if (fork() != 0)
+		return 0;
+
+	/* init */
+	wa.override_redirect = 1;
+	wa.background_pixel = WhitePixel(dpy, screen);
+	w = XCreateWindow(dpy, root, 0, 0, DisplayWidth(dpy, screen), DisplayHeight(dpy, screen),
+			0, DefaultDepth(dpy, screen), CopyFromParent,
+			DefaultVisual(dpy, screen), CWOverrideRedirect | CWBackPixel, &wa);
+	XAllocNamedColor(dpy, DefaultColormap(dpy, screen), "black", &black, &dummy);
+	pmap = XCreateBitmapFromData(dpy, w, curs, 8, 8);
+	invisible = XCreatePixmapCursor(dpy, pmap, pmap, &black, &black, 0, 0);
+	XDefineCursor(dpy, w, invisible);
+	XMapRaised(dpy, w);
+	for(len = 1000; len; len--) {
+		if(XGrabPointer(dpy, root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
+			GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
+			break;
+		usleep(1000);
+	}
+	if((running = running && (len > 0))) {
+		for(len = 1000; len; len--) {
+			if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime)
+				== GrabSuccess)
+				break;
+			usleep(1000);
+		}
+		running = (len > 0);
+	}
+	len = 0;
+	XSync(dpy, False);
+
+	/* main event loop */
+	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;
+#ifdef HAVE_BSD_AUTH
+				running = !auth_userokay(getlogin(), NULL, "auth-xlock", passwd);
+#else
+				running = strcmp(crypt(passwd, pws), pws);
+#endif
+				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;
+			}
+		}
+	}
+	XUngrabPointer(dpy, CurrentTime);
+	XFreePixmap(dpy, pmap);
+	XDestroyWindow(dpy, w);
+	XCloseDisplay(dpy);
+	return 0;
+}