--- /dev/null
+#include <err.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "util.h"
+
+const char *
+gid(void)
+{
+ return bprintf("%d", getgid());
+}
+
+const char *
+username(void)
+{
+ struct passwd *pw = getpwuid(geteuid());
+
+ if (pw == NULL) {
+ warn("Failed to get username");
+ return NULL;
+ }
+
+ return bprintf("%s", pw->pw_name);
+}
+
+const char *
+uid(void)
+{
+ return bprintf("%d", geteuid());
+}