From 0b39b2e2ddb2df1d1325e042893ddcb1a1c12b8e Mon Sep 17 00:00:00 2001 From: Mike Karels Date: Mon, 20 May 2024 08:43:34 -0500 Subject: [PATCH] adduser: create dataset only if home is directly within dataset Currently, if the prefix of the new home directory is a subdirectory of a ZFS dataset, adduser will create a new dataset up one or more levels from the intended destination. "pw useradd" will then create a normal directory in the desired location, leaving an unused dataset. Check for this situation when determining whether to create a dataset, and let pw create the directory. Reviewed by: des Differential Revision: https://reviews.freebsd.org/D45229 MFC after: 3 days --- usr.sbin/adduser/adduser.sh | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/usr.sbin/adduser/adduser.sh b/usr.sbin/adduser/adduser.sh index 7c3fdb418179..ecac7478befd 100644 --- a/usr.sbin/adduser/adduser.sh +++ b/usr.sbin/adduser/adduser.sh @@ -474,7 +474,7 @@ get_homeperm() { # so, enable ZFS home dataset creation. # get_zfs_home() { - local _prefix= + local _prefix= _tmp= # check if zfs kernel module is loaded before attempting to run zfs to # prevent loading the kernel module on systems that don't use ZFS @@ -487,6 +487,13 @@ get_zfs_home() { Zcreate="no" return fi + # Make sure that _prefix is not a subdirectory within a dataset. If it + # is, the containing dataset will be the same for it and its parent. + _tmp=$(${ZFSCMD} list -Ho name "$(dirname "${homeprefix}")" 2>/dev/null) + if [ "${_tmp}" = "${_prefix}" ]; then + Zcreate="no" + return + fi zhome="${_prefix}/${username}" }