From dba2d399378581f5129a4b600bef81dcb815be8e Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Thu, 28 Oct 2021 01:22:35 +0200
Subject: [PATCH] idmap functions

---
 users.sh | 37 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/users.sh b/users.sh
index a389f15..873edf0 100755
--- a/users.sh
+++ b/users.sh
@@ -27,9 +27,10 @@ LOCAL_USER='local \
   USER_EXPIRE USER_DEVICES USER_FUTUREUSE
 '
 
+unset USER_IDMAP
 eval "$UNSET_USER"
 
-user_db="${_DATA}/users.db"
+user_db="${user_db:-${_DATA}/users.db}"
 
 read_user() {
   local user="$1"
@@ -127,6 +128,40 @@ new_user(){
   fi
 }
 
+user_idmap(){
+  local uid="$1" ret
+  eval "$LOCAL_USER"
+
+  if [ ! "$USER_IDMAP" ]; then
+    while read_user; do
+      USER_IDMAP="${USER_IDMAP}${USER_ID}	${USER_NAME}${BR}"
+    done <"$user_db"
+  fi
+  if [ "$uid" -a "$USER_IDMAP" != "${USER_IDMAP##*${uid}	}" ]; then
+    ret="${USER_IDMAP##*${uid}	}"; ret="${ret%%${BR}*}";
+    printf '%s\n' "$ret"
+    return 0
+  elif [ "$uid" ]; then
+    return 1
+  else
+    printf '%s' "$USER_IDMAP"
+    return 0
+  fi
+}
+
+user_idof(){
+  local name="$(STRING "$1")" ret
+  [ "$USER_IDMAP" ] || user_idmap >/dev/null
+
+  if [ "${name%\\}" -a "$USER_IDMAP" != "${USER_IDMAP%	${name}${BR}*}" ]; then
+    ret="${USER_IDMAP%	${name}${BR}*}"; ret="${ret##*${BR}}"
+    printf '%s\n' "$ret"
+    return 0
+  else
+    return 1
+  fi
+}
+
 user_checkname(){
   { [ $# -gt 0 ] && printf %s "$*" || cat; } \
   | sed -nE '
-- 
2.39.2