shadow: Enable subid support

shadow utils are used when creating users at image creation time. The
useradd/usermod tools will only try to add a default configuration for
subid files if they exist.

(From OE-Core rev: 364a6f408c9feb5b9472ddabbc352d8b432bfffd)

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/meta/recipes-extended/shadow/shadow.inc b/meta/recipes-extended/shadow/shadow.inc
index fbb1d395ff..b2f82e9ac7 100644
--- a/meta/recipes-extended/shadow/shadow.inc
+++ b/meta/recipes-extended/shadow/shadow.inc
@@ -147,6 +147,13 @@ do_install:append() {
         # Handle link properly after rename, otherwise missing files would
         # lead rpm failed dependencies.
         ln -sf newgrp.${BPN} ${D}${bindir}/sg
+
+        # usermod requires the subuid/subgid files to be in place before being
+        # able to use the -v/-V flags otherwise it fails:
+        # usermod: /etc/subuid does not exist, you cannot use the flags -v or -V
+        install -d ${D}${sysconfdir}
+        touch ${D}${sysconfdir}/subuid
+        touch ${D}${sysconfdir}/subgid
 }
 
 PACKAGES =+ "${PN}-base"