sys-user.eclass: add a sys-user_modify() function.

diff --git a/eclass/sys-user.eclass b/eclass/sys-user.eclass
index 92c782974da8897a2a347ba3b0ceb325d56fd465..b90b59027a53c8e8f27f2588bda5f79c6cb1c484 100644 (file)
--- a/eclass/sys-user.eclass
+++ b/eclass/sys-user.eclass
@@ -9,7 +9,7 @@
 # This eclass does most of the work for the sys-user/ packages that
 # supply system user accounts.
 
-# Needed for egetshell and egethome
+# Needed for egetshell and egethome.
 inherit user
 
 EXPORT_FUNCTIONS pkg_pretend src_unpack src_configure src_compile src_install src_test pkg_preinst pkg_postinst pkg_prerm
@@ -105,6 +105,22 @@ sys-user_create() {
 }
 
 
+sys-user_modify() {
+       # Modify the existing user named $SYS_USER_NAME to match the values
+       # contained in the following variables:
+       #
+       #  * SYS_USER_UID
+       #  * SYS_USER_SHELL
+       #  * SYS_USER_HOME
+       #  * SYS_USER_GROUPS
+       #
+       usermod ${SYS_USER_UID:+--uid }"${SYS_USER_UID}" \
+                       ${SYS_USER_GROUPS:+--append --groups }"${SYS_USER_GROUPS}" \
+                       --shell "${SYS_USER_SHELL}" \
+                       --home-dir "${SYS_USER_HOME}" \
+                       "${SYS_USER_NAME}"
+}
+
 sys-user_pkg_pretend() {
        # Sanity checks that would otherwise run code in global scope.
        #
@@ -226,8 +242,9 @@ sys-user_pkg_preinst() {
                fi
 
                # The user already exists, so all we have left to do is to try
-               # to append SYS_USER_GROUPS to the existing groups.
-               usermod --append --groups "${SYS_USER_GROUPS}" \
+               # to append SYS_USER_GROUPS to the existing groups. The home
+               # dir, shell, and uid should all match already.
+               sys-user_modify \
                        || die "failed to append groups to existing user ${SYS_USER_NAME}"
        fi
 }