Initial commit

3 files changed, 54 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9080e5e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+xrandr-notify
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a12808a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+TARGETS:= xrandr-notify
+LDFLAGS:=-lX11 -lXrandr
+
+all: $(TARGETS)
+
+clean:
+	$(RM) $(TARGETS)
diff --git a/xrandr-notify.c b/xrandr-notify.c
new file mode 100644
index 0000000..3c1ad52
--- /dev/null
+++ b/xrandr-notify.c
@@ -0,0 +1,46 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xrandr.h>
+
+int main(int argc, char **argv)
+{
+    Display *dpy;
+    Window root;
+    XEvent event;
+    int dummy, screen, randr_event_base;
+    bool has_randr;
+
+    dpy = XOpenDisplay(NULL);
+    if (dpy == NULL) {
+        fputs("ERROR: Could not open display!\n", stderr);
+        return EXIT_FAILURE;
+    }
+
+    /* Is the randr extension available? */
+    has_randr = false;
+    has_randr = XRRQueryExtension(dpy, &randr_event_base, &dummy);
+
+    if (has_randr) {
+        /* Get root window */
+        screen = DefaultScreen(dpy) ;
+        root = RootWindow(dpy, screen) ;
+
+        /* Notify on configuration change */
+        XRRSelectInput(dpy, root, RRScreenChangeNotifyMask);
+    }
+
+    while (true) {
+        XNextEvent(dpy, &event);
+
+        if (event.type == randr_event_base + RRScreenChangeNotify) {
+            return EXIT_SUCCESS;
+        }
+    }
+
+    /* should never happen */
+    return EXIT_FAILURE;
+}
+