[Bug 269042] ifconfig list fails since 2c24ad3377a6f58 / D37873

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269042

            Bug ID: 269042
           Summary: ifconfig list fails since 2c24ad3377a6f58 / D37873
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: bugs.fbsd@paepcke.de

Hello all, 

https://cgit.freebsd.org/src/commit/sbin/ifconfig?id=2c24ad3377a6f584e484656db8390e4eb7cfc119

https://reviews.freebsd.org/D37873

Since this commit replaced the general silent fail
for any kind of kdload error with a hard (exit) fail,
except for ENOENT - ifconfig fails hard (exit) even
in case the user has not even the permission to launch
the syscall to kldload. 

-       /*
-        * Try to load the module.  But ignore failures, because ifconfig can't
-        * infer the names of all drivers (eg mlx4en(4)).
-        */
-       (void) kldload(ifkind);
+       /* Try to load the module. */
+       if (kldload(ifkind) < 0) {
+               switch (errno) {
+               case ENOENT:
+                       /*
+                        * Ignore ENOENT, because ifconfig can't infer the
+                        * names of all drivers (eg mlx4en(4)).
+                        */
+                       break;
+               default:
+                       err(1, "kldload(%s)", ifkind);
+               }
+       }

Was this intentional or can we add nother exception
for informal msg without (hard) exit here?

Thank you! 
Michael

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