vnconfig -l: handle gracefully missing regular file

Check if VNIOCGET failed to retrieve the path of the regular
file, that is associated with the respective vn device. If so,
treat this kind of error as non-fatal (with respect to the rest
of the vn devices).

diff --git a/usr.sbin/vnconfig/vnconfig.c b/usr.sbin/vnconfig/vnconfig.c
index d1f89d1..dc84b76 100644 (file)
--- a/usr.sbin/vnconfig/vnconfig.c
+++ b/usr.sbin/vnconfig/vnconfig.c
@@ -320,9 +320,17 @@ getinfo( const char *vname )
                else {
                        if (ioctl(vd, VNIOCGET, &vnu) == -1) {
                                if (errno != ENXIO) {
-                                       err(1, "ioctl: %s", vname);
-                                       close(vd);
-                                       return 1;
+                                       if (*vnu.vnu_file == '\0') {
+                                               fprintf(stdout,
+                                                   "vn%d: ioctl: can't access regular file\n",
+                                                   vnu.vnu_unit);
+                                               continue;
+                                       }
+                                       else {
+                                               err(1, "ioctl: %s", vname);
+                                               close(vd);
+                                               return 1;
+                                       }
                                }
                        }