From 3f5a187dcf8ad2f0690046876d30d37630c11014 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Wed, 17 Aug 2016 22:15:54 -0400 Subject: [PATCH] shared/install: properly report masked units listed in Also= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A masked unit is listed in Also=: $ systemctl cat test1 test2 →# /etc/systemd/system/test1.service [Unit] Description=test service 1 [Service] Type=oneshot ExecStart=/usr/bin/true [Install] WantedBy=multi-user.target Also=test2.service Alias=alias1.service →# /dev/null $ systemctl --root=/ enable test1 (before) Created symlink /etc/systemd/system/alias1.service → /etc/systemd/system/test1.service. Created symlink /etc/systemd/system/multi-user.target.wants/test1.service → /etc/systemd/system/test1.service. The unit files have no installation config (WantedBy, RequiredBy, Also, Alias settings in the [Install] section, and DefaultInstance for template units). This means they are not meant to be enabled using systemctl. Possible reasons for having this kind of units are: 1) A unit may be statically enabled by being symlinked from another unit's .wants/ or .requires/ directory. 2) A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it. 3) A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...). 4) In case of template units, the unit is meant to be enabled with some instance name specified. (after) Created symlink /etc/systemd/system/alias1.service → /etc/systemd/system/test1.service. Created symlink /etc/systemd/system/multi-user.target.wants/test1.service → /etc/systemd/system/test1.service. Unit /etc/systemd/system/test2.service is masked, ignoring. (cherry picked from commit f16517151310b88591f3501a59e23ae2a79e7f02) --- src/shared/install.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/src/shared/install.c b/src/shared/install.c index 9ce8e4d390..9d9f4dff4f 100644 --- a/src/shared/install.c +++ b/src/shared/install.c @@ -1686,6 +1686,17 @@ static int install_context_apply( if (r < 0) return r; + /* We can attempt to process a masked unit when a different unit + * that we were processing specifies it in DefaultInstance= or Also=. */ + if (i->type == UNIT_FILE_TYPE_MASKED) { + unit_file_changes_add(changes, n_changes, UNIT_FILE_IS_MASKED, i->path, NULL); + if (r >= 0) + /* Assume that some *could* have been enabled here, avoid + * "empty [Install] section" warning. */ + r += 1; + continue; + } + if (i->type != UNIT_FILE_TYPE_REGULAR) continue; -- 2.9.0