1 files changed, 49 insertions, 0 deletions
diff --git a/lib/myname.c b/lib/myname.c
new file mode 100644
index 0000000..1b02617
--- /dev/null
+++ b/lib/myname.c
@@ -0,0 +1,49 @@
+/*
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * myname.c - determine the current username and get the passwd entry
+ *
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "defines.h"
+#include <pwd.h>
+#include "prototypes.h"
+/*@null@*/ /*@only@*/struct passwd *get_my_pwent (void)
+{
+	struct passwd *pw;
+	const char *cp = getlogin ();
+	uid_t ruid = getuid ();
+
+	/*
+	 * Try getlogin() first - if it fails or returns a non-existent
+	 * username, or a username which doesn't match the real UID, fall
+	 * back to getpwuid(getuid()).  This should work reasonably with
+	 * usernames longer than the utmp limit (8 characters), as well as
+	 * shared UIDs - but not both at the same time...
+	 *
+	 * XXX - when running from su, will return the current user (not
+	 * the original user, like getlogin() does).  Does this matter?
+	 */
+	if ((NULL != cp) && ('\0' != *cp)) {
+		pw = xgetpwnam (cp);
+		if ((NULL != pw) && (pw->pw_uid == ruid)) {
+			return pw;
+		}
+		if (NULL != pw) {
+			pw_free (pw);
+		}
+	}
+
+	return xgetpwuid (ruid);
+}
+