K 10
svn:author
V 7
git2svn
K 8
svn:date
V 27
2021-10-17T18:47:05.420068Z
K 7
svn:log
V 472
When we have a command returned by zfs_nextboot() that is longer
than command in the loader.conf, the latter needs to be nul terminated,
otherwise garbage trailer left from zfs_nextboot() will be passed to
parse_cmd() together with loader.conf command.

While here, reset cmd to empty string if read() returns error.

(cherry picked from commit c7dd069c70d465298f14553d981bfe5e2ffd0459)

Git Hash:   4d997b340dd7ee561b2f44bbcef3c532108640e6
Git Author: glebius@FreeBSD.org
END