who: fix -m with guessed tty names

* who.c (scan_entries): Account for guessed tty names (e.g.
'sshd pts/1') from the readutmp module when using the systemd backend.
* bootstrap.conf (gnulib_modules): Add str_endswith.
* News: Mention the bug fix.
Addresses https://bugzilla.redhat.com/2343998

NEWS

@@ -14,6 +14,10 @@ GNU coreutils NEWS                                    -*- outline -*-
   'ls -Z dir' would crash.
   [bug introduced in coreutils-9.6]
 
+  'who -m' now outputs entries for remote logins.  Previously login
+  entries prefixed with the service (like "sshd") were not matched.
+  [bug introduced in coreutils-9.4]
+
 
 * Noteworthy changes in release 9.6 (2025-01-17) [stable]
 

bootstrap.conf

@@ -253,6 +253,7 @@ gnulib_modules="
   stdckdint-h
   stdlib-safer
   stpcpy
+  str_endswith
   strdup-posix
   strnlen
   strnumcmp

src/who.c

@@ -577,7 +577,7 @@ scan_entries (idx_t n, struct gl_utmp const *utmp_buf)
   while (n--)
     {
       if (!my_line_only
-          || STREQ (ttyname_b, utmp_buf->ut_line))
+          || str_endswith (utmp_buf->ut_line, ttyname_b))
         {
           if (need_users && IS_USER_PROCESS (utmp_buf))
             print_user (utmp_buf, boottime);