initial commit

1 files changed, 92 insertions, 0 deletions

diff --git a/slock.c b/slock.c
new file mode 100644
index 0000000..824baa2
--- /dev/null
+++ b/slock.c
@@ -0,0 +1,92 @@
+/* (C)opyright MMIV-MMV Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+#define _XOPEN_SOURCE
+#include <shadow.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>
+
+int
+main(int argc, char **argv) {
+	char buf[32], passwd[256];
+	int num, prev_nitem;
+	struct spwd *sp;
+	unsigned int i, len;
+	Bool running = True;
+	KeySym ksym;
+	Display *dpy;
+	XEvent ev;
+
+	if((argc > 1) && !strncmp(argv[1], "-v", 3)) {
+		fputs("slock-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
+		exit(EXIT_SUCCESS);
+	}
+	if(!(sp = getspnam(getenv("USER")))) {
+		fputs("slock: cannot retrieve password entry (make sure to suid slock)\n", stderr);
+		exit(EXIT_FAILURE);
+	}
+	endspent();
+	if(!(dpy = XOpenDisplay(0))) {
+		fputs("slock: cannot open display\n", stderr);
+		exit(EXIT_FAILURE);
+	}
+
+	/* init */
+	passwd[0] = 0;
+	while(XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
+			 GrabModeAsync, CurrentTime) != GrabSuccess)
+		usleep(1000);
+
+	/* main event loop */
+	while(running && !XNextEvent(dpy, &ev))
+		if(ev.type == KeyPress) {
+			len = strlen(passwd);
+			buf[0] = 0;
+			num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
+			if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
+					|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
+					|| IsPrivateKeypadKey(ksym))
+				continue;
+			/* first check if a control mask is omitted */
+			if(ev.xkey.state & ControlMask) {
+				switch (ksym) {
+				case XK_h:
+				case XK_H: ksym = XK_BackSpace;
+					break;
+				case XK_u:
+				case XK_U: passwd[0] = 0;
+					continue;
+				}
+			}
+			switch(ksym) {
+			case XK_Return:
+				running = strncmp(crypt(passwd, sp->sp_pwdp), sp->sp_pwdp, sizeof(passwd));
+				passwd[0] = 0;
+				break;
+			case XK_Escape:
+				passwd[0] = 0;
+				break;
+			case XK_BackSpace:
+				if(len)
+					passwd[--len] = 0;
+				break;
+			default:
+				if(num && !iscntrl((int) buf[0])) {
+					buf[num] = 0;
+					if(len)
+						strncat(passwd, buf, sizeof(passwd));
+					else
+						strncpy(passwd, buf, sizeof(passwd));
+				}
+				break;
+			}
+		}
+	XCloseDisplay(dpy);
+	return 0;
+}