X-Git-Url: https://git.armaanb.net/?a=blobdiff_plain;f=slock.c;h=6be8f22c8c0fd4c77042884b18c766c6a079c730;hb=b95ee111c7625375716e848ec81af2f57ca35b02;hp=df5c3fea36f2e0f1b7ccdb1e035588bd0f0a5d00;hpb=f2ea92c3ddf1d9476ef61f85ec3aa26818d094a1;p=slock.git

diff --git a/slock.c b/slock.c
index df5c3fe..6be8f22 100644
--- a/slock.c
+++ b/slock.c
@@ -13,6 +13,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/types.h>
+#include <X11/extensions/Xrandr.h>
 #include <X11/keysym.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ -25,7 +26,7 @@
 enum {
 	INIT,
 	INPUT,
-	EMPTY,
+	FAILED,
 	NUMCOLS
 };
 
@@ -41,6 +42,10 @@ typedef struct {
 static Lock **locks;
 static int nscreens;
 static Bool running = True;
+static Bool failure = False;
+static Bool rr;
+static int rrevbase;
+static int rrerrbase;
 
 static void
 die(const char *errstr, ...)
@@ -55,16 +60,27 @@ die(const char *errstr, ...)
 
 #ifdef __linux__
 #include <fcntl.h>
+#include <linux/oom.h>
 
 static void
 dontkillme(void)
 {
 	int fd;
+	int length;
+	char value[64];
 
 	fd = open("/proc/self/oom_score_adj", O_WRONLY);
 	if (fd < 0 && errno == ENOENT)
 		return;
-	if (fd < 0 || write(fd, "-1000\n", 6) != 6 || close(fd) != 0)
+
+	/* convert OOM_SCORE_ADJ_MIN to string for writing */
+	length = snprintf(value, sizeof(value), "%d\n", OOM_SCORE_ADJ_MIN);
+
+	/* bail on truncation */
+	if (length >= sizeof(value))
+		die("buffer too small\n");
+
+	if (fd < 0 || write(fd, value, length) != length || close(fd) != 0)
 		die("cannot disable the out-of-memory killer for this process\n");
 }
 #endif
@@ -114,11 +130,12 @@ readpw(Display *dpy, const char *pws)
 {
 	char buf[32], passwd[256];
 	int num, screen;
-	unsigned int len, llen;
+	unsigned int len, color;
 	KeySym ksym;
 	XEvent ev;
+	static int oldc = INIT;
 
-	len = llen = 0;
+	len = 0;
 	running = True;
 
 	/* As "slock" stands for "Simple X display locker", the DPMS settings
@@ -128,7 +145,7 @@ readpw(Display *dpy, const char *pws)
 	while (running && !XNextEvent(dpy, &ev)) {
 		if (ev.type == KeyPress) {
 			buf[0] = 0;
-			num = XLookupString(&ev.xkey, buf, sizeof buf, &ksym, 0);
+			num = XLookupString(&ev.xkey, buf, sizeof(buf), &ksym, 0);
 			if (IsKeypadKey(ksym)) {
 				if (ksym == XK_KP_Enter)
 					ksym = XK_Return;
@@ -149,8 +166,10 @@ readpw(Display *dpy, const char *pws)
 #else
 				running = !!strcmp(crypt(passwd, pws), pws);
 #endif
-				if (running)
+				if (running) {
 					XBell(dpy, 100);
+					failure = True;
+				}
 				len = 0;
 				break;
 			case XK_Escape:
@@ -161,26 +180,29 @@ readpw(Display *dpy, const char *pws)
 					--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) {
+			color = len ? INPUT : (failure || failonclear ? FAILED : INIT);
+			if (running && oldc != color) {
 				for (screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
+					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[color]);
 					XClearWindow(dpy, locks[screen]->win);
 				}
-			} else if (llen != 0 && len == 0) {
-				for (screen = 0; screen < nscreens; screen++) {
-					XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[EMPTY]);
+				oldc = color;
+			}
+		} else if (rr && ev.type == rrevbase + RRScreenChangeNotify) {
+			XRRScreenChangeNotifyEvent *rre = (XRRScreenChangeNotifyEvent*)&ev;
+			for (screen = 0; screen < nscreens; screen++) {
+				if (locks[screen]->win == rre->window) {
+					XResizeWindow(dpy, locks[screen]->win, rre->width, rre->height);
 					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);
 	}
 }
@@ -236,6 +258,8 @@ 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);
+	if (rr)
+		XRRSelectInput(dpy, lock->win, RRScreenChangeNotifyMask);
 	for (len = 1000; len; len--) {
 		if (XGrabPointer(dpy, lock->root, False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
 		    GrabModeAsync, GrabModeAsync, None, invisible, CurrentTime) == GrabSuccess)
@@ -295,6 +319,7 @@ main(int argc, char **argv) {
 
 	if (!(dpy = XOpenDisplay(0)))
 		die("slock: cannot open display\n");
+	rr = XRRQueryExtension(dpy, &rrevbase, &rrerrbase);
 	/* Get the number of screens in display "dpy" and blank them all. */
 	nscreens = ScreenCount(dpy);
 	locks = malloc(sizeof(Lock *) * nscreens);