useradd_base: keep group if it still has users

perform_groupdel() tries to delete a group irrespective if other
users have it as their primary group, thus the call to groupdel will
fail with the following error error:

groupdel: cannot remove the primary group of user '<user>'

Add a check to perform_groupdel() to determine if there are other
users and keep the group, printing a warning. This is called right
after a user is deleted to delete it's group. If the last user is
deleted, only then the group is also deleted.

(From OE-Core rev: bba1f02cb6d80279c6fed34bb18f010aa921fc1e)

Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 14 insertions, 4 deletions

diff --git a/meta/classes/useradd_base.bbclass b/meta/classes/useradd_base.bbclass
index ba87edc57a..551c82c322 100644
--- a/meta/classes/useradd_base.bbclass
+++ b/meta/classes/useradd_base.bbclass
@@ -69,11 +69,21 @@ perform_groupdel () {
         bbnote "${PN}: Performing groupdel with [$opts]"
         local groupname=`echo "$opts" | awk '{ print $NF }'`
         local group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+
         if test "x$group_exists" != "x"; then
-                eval flock -x $rootdir${sysconfdir} -c \"$PSEUDO groupdel \$opts\" || true
-                group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
-                if test "x$group_exists" != "x"; then
-                        bbfatal "${PN}: groupdel command did not succeed."
+                local awk_input='BEGIN {FS=":"}; $1=="'$groupname'" { print $3 }'
+                local groupid=`echo "$awk_input" | awk -f- $rootdir/etc/group`
+                local awk_check_users='BEGIN {FS=":"}; $4=="'$groupid'" {print $1}'
+                local other_users=`echo "$awk_check_users" | awk -f- $rootdir/etc/passwd`
+
+                if test "x$other_users" = "x"; then
+                        eval flock -x $rootdir${sysconfdir} -c \"$PSEUDO groupdel \$opts\" || true
+                        group_exists="`grep "^$groupname:" $rootdir/etc/group || true`"
+                        if test "x$group_exists" != "x"; then
+                                bbfatal "${PN}: groupdel command did not succeed."
+                        fi
+                else
+                        bbnote "${PN}: '$groupname' is primary group for users '$other_users', not removing it"
                 fi
         else
                 bbnote "${PN}: group $groupname doesn't exist, not removing it"