user.eclass: Introduce eget{user,group}name

Signed-off-by: Michał Górny <mgorny@gentoo.org>

diff --git a/eclass/user.eclass b/eclass/user.eclass
index 3bd381b0c089d6cbd9b7f092064fc9524c87329c..7592ee3bba23b1fcaf7032bc403ea3a8f48d156d 100644 (file)
--- a/eclass/user.eclass
+++ b/eclass/user.eclass
@@ -351,6 +351,26 @@ enewgroup() {
        esac
 }
 
+# @FUNCTION: egetusername
+# @USAGE: <uid>
+# @DESCRIPTION:
+# Gets the username for given UID.
+egetusername() {
+       [[ $# -eq 1 ]] || die "usage: egetusername <uid>"
+
+       id -u -n "$1"
+}
+
+# @FUNCTION: egetgroupname
+# @USAGE: <gid>
+# @DESCRIPTION:
+# Gets the group name for given GID.
+egetgroupname() {
+       [[ $# -eq 1 ]] || die "usage: egetgroupname <gid>"
+
+       id -g -n "$1"
+}
+
 # @FUNCTION: egethome
 # @USAGE: <user>
 # @DESCRIPTION: