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support/scripts/mkusers: preserve group members

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When the function add_one_group is called on an existing group,
make sure the members of this group are not removed in the process of
deleting then re-adding the group.

Signed-off-by: Johan Oudinet <johan.oudinet@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
[Thomas: add curly braces when referencing ${members}, as suggested by
Yann.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Johan Oudinet 2018-09-03 15:11:16 +02:00 committed by Thomas Petazzoni
parent 04d7572a85
commit 497f7134fc
1 changed files with 11 additions and 2 deletions
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13
support/scripts/mkusers
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@ -75,6 +75,14 @@ get_gid() {
'$1 == group { printf( "%d\n", $3 ); }' "${GROUP}"
}
#----------------------------------------------------------------------------
get_members() {
local group="${1}"
awk -F: -v group="${group}" \
'$1 == group { printf( "%s\n", $4 ); }' "${GROUP}"
}
#----------------------------------------------------------------------------
get_username() {
local uid="${1}"
@ -211,16 +219,17 @@ generate_gid() {
add_one_group() {
local group="${1}"
local gid="${2}"
local _f
local members
# Generate a new GID if needed
if [ ${gid} -eq -1 ]; then
gid="$( generate_gid "${group}" )"
fi
members=$(get_members "$group")
# Remove any previous instance of this group, and re-add the new one
sed -i --follow-symlinks -e '/^'"${group}"':.*/d;' "${GROUP}"
printf "%s:x:%d:\n" "${group}" "${gid}" >>"${GROUP}"
printf "%s:x:%d:%s\n" "${group}" "${gid}" "${members}" >>"${GROUP}"
# Ditto for /etc/gshadow if it exists
if [ -f "${GSHADOW}" ]; then