From: Jakub Jirutka <jakub@jirutka.cz>
Date: Mon, 20 Dec 2021 18:52:00 +0100
Subject: [PATCH] Add support for utmps

The following programs use utmpx.h: last, login, lslogins, agetty, wall, write.

Programs 'su' and 'runuser' include utmpx.h, but use only btmp which is not
supported on Alpine.

--- a/include/pathnames.h
+++ b/include/pathnames.h
@@ -214,5 +214,13 @@
 #define _PATH_DEV_RFKILL	"/dev/rfkill"
 #define _PATH_SYS_RFKILL	"/sys/class/rfkill"
 
+#ifdef UTMPS_UTMPX_H
+/* override stub paths from <paths.h> with ones for utmps */
+# undef _PATH_UTMP
+# define _PATH_UTMP		UTMPX_FILE
+# undef _PATH_WTMP
+# define _PATH_WTMP		"/var/log/wtmp"
+#endif
+
 
 #endif /* PATHNAMES_H */