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[__ssh_authorized_keys] Fall back to /etc files if getent(1) is not available

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Some (embedded) systems don't provide getent(1). The workaround parses
/etc/passwd and /etc/group under the assumption that these sysems only use local
users and groups.
This commit is contained in:
Dennis Camera 2019-10-01 08:26:59 +02:00
commit 95ab68a272
2 changed files with 50 additions and 5 deletions
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26
cdist/conf/type/__ssh_authorized_keys/explorer/file
View file

@ -1,6 +1,7 @@
#!/bin/sh
#
# 2014 Steven Armstrong (steven-cdist at armstrong.cc)
# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
@ -21,7 +22,28 @@
if [ -f "$__object/parameter/file" ]; then
cat "$__object/parameter/file"
else
owner="$(cat "$__object/parameter/owner" 2>/dev/null || echo "$__object_id")"
home=$(getent passwd "$owner" | cut -d':' -f 6)
if [ -s "$__object/parameter/owner" ]
then
owner=$(cat "$__object/parameter/owner")
else
owner="$__object_id"
fi
if command -v getent >/dev/null
then
owner_line=$(getent passwd "$owner")
else
case $owner
in
[0-9][0-9]*)
owner_line=$(awk -F: "\$3 == \"${owner}\" { print }" /etc/passwd)
;;
*)
owner_line=$(awk -F: "\$1 == \"${owner}\" { print }" /etc/passwd)
;;
esac
fi
home=$(echo "$owner_line" | cut -d':' -f6)
echo "$home/.ssh/authorized_keys"
fi

29
cdist/conf/type/__ssh_authorized_keys/explorer/group
View file

@ -1,6 +1,7 @@
#!/bin/sh
#
# 2014 Steven Armstrong (steven-cdist at armstrong.cc)
# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
@ -18,6 +19,28 @@
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
owner="$(cat "$__object/parameter/owner" 2>/dev/null || echo "$__object_id")"
gid="$(getent passwd "$owner" | cut -d':' -f 4)"
getent group "$gid" || true
if [ -s "$__object/parameter/owner" ]
then
owner=$(cat "$__object/parameter/owner")
else
owner="$__object_id"
fi
if command -v getent >/dev/null
then
gid=$(getent passwd "$owner" | cut -d':' -f4)
getent group "$gid" || true
else
# Fallback to local file scanning
case $owner
in
[0-9][0-9]*)
gid=$(awk -F: "\$3 == \"${owner}\" { print $4 }" /etc/passwd)
;;
*)
gid=$(awk -F: "\$1 == \"${owner}\" { print $4 }" /etc/passwd)
;;
esac
awk -F: "\$3 == \"$gid\" { print }" /etc/group
fi