Add herbe (notification display)

programs/slstatus/components/user.c

@@ -0,0 +1,33 @@
+/* See LICENSE file for copyright and license details. */
+#include <pwd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "../slstatus.h"
+#include "../util.h"
+
+const char *
+gid(const char *unused)
+{
+	return bprintf("%d", getgid());
+}
+
+const char *
+username(const char *unused)
+{
+	struct passwd *pw;
+
+	if (!(pw = getpwuid(geteuid()))) {
+		warn("getpwuid '%d':", geteuid());
+		return NULL;
+	}
+
+	return bprintf("%s", pw->pw_name);
+}
+
+const char *
+uid(const char *unused)
+{
+	return bprintf("%d", geteuid());
+}