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117 lines
7.2 KiB
117 lines
7.2 KiB
2 years ago
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From 5aa2be25e7de16f4d3ff3b322cf8c35574e712c5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Wed, 16 Mar 2022 09:51:24 +0100
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Subject: [PATCH] =?UTF-8?q?shared/install:=20also=20remove=20symlinks=20li?=
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=?UTF-8?q?ke=20.wants/foo@one.service=20=E2=86=92=20../foo@one.service?=
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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So far 'systemctl enable' would create absolute links to the target template
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name. And we would remove such symlinks just fine. But the user may create
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symlinks manually in a different form. In particular, symlinks for instanced
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units *must* have the instance in the source name, and then it is natural to
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also include it in the target name (.wants/foo@one.service → ../foo@one.service
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rather than .wants/foo@one.service → ../foo@.service). We would choke on such
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links, or not remove them at all. A test is added:
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before:
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+ build-rawhide/systemctl --root=/tmp/systemctl-test.001xda disable templ1@.service
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Removed "/tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@seven.service".
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Removed "/tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@six.service".
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Removed "/tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@five.service".
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Removed "/tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@four.service".
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Removed "/tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@three.service".
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Failed to disable unit, refusing to operate on linked unit file /tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@two.service.
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Failed to disable unit, refusing to operate on linked unit file /tmp/systemctl-test.001xda/etc/systemd/system/services.target.wants/templ1@two.service.
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after:
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+ build-rawhide/systemctl --root=/tmp/systemctl-test.QVP0ev disable templ1@.service
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@seven.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@six.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@five.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@four.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@three.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@two.service".
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Removed "/tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@one.service".
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@one.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@two.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@three.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@four.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@five.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@six.service
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+ test '!' -h /tmp/systemctl-test.QVP0ev/etc/systemd/system/services.target.wants/templ1@seven.service
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(cherry picked from commit 9f61c9f79e0f77044b71ef2ba5edde20e15c6ad2)
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Related: #2082131
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---
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src/shared/install.c | 16 +++++++++++++---
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test/test-systemctl-enable.sh | 20 ++++++++++++++++++++
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2 files changed, 33 insertions(+), 3 deletions(-)
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diff --git a/src/shared/install.c b/src/shared/install.c
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index 08a9892260..43955519ae 100644
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--- a/src/shared/install.c
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+++ b/src/shared/install.c
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@@ -612,13 +612,23 @@ static int remove_marked_symlinks_fd(
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path_simplify(p);
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/* We remove all links pointing to a file or path that is marked, as well as all
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- * files sharing the same name as a file that is marked. Do path chasing only if
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- * we don't already know that we want to remove the symlink. */
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+ * files sharing the same name as a file that is marked, and files sharing the same
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+ * name after the instance has been removed. Do path chasing only if we don't already
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+ * know that we want to remove the symlink. */
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found = set_contains(remove_symlinks_to, de->d_name);
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if (!found) {
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- _cleanup_free_ char *dest = NULL;
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+ _cleanup_free_ char *template = NULL;
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+
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+ q = unit_name_template(de->d_name, &template);
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+ if (q < 0 && q != -EINVAL)
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+ return q;
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+ if (q >= 0)
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+ found = set_contains(remove_symlinks_to, template);
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+ }
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+ if (!found) {
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+ _cleanup_free_ char *dest = NULL;
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q = chase_symlinks(p, lp->root_dir, CHASE_NONEXISTENT, &dest, NULL);
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if (q == -ENOENT)
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diff --git a/test/test-systemctl-enable.sh b/test/test-systemctl-enable.sh
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index 220ebfdab7..4462fb386e 100644
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--- a/test/test-systemctl-enable.sh
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+++ b/test/test-systemctl-enable.sh
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@@ -333,6 +333,26 @@ test ! -h "$root/etc/systemd/system/other@templ1.target.requires/templ1@one.serv
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test ! -h "$root/etc/systemd/system/services.target.wants/templ1@two.service"
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test ! -h "$root/etc/systemd/system/other@templ1.target.requires/templ1@two.service"
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+: -------removal of relative enablement symlinks--------------
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@.service"
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+ln -s '../templ1@one.service' "$root/etc/systemd/system/services.target.wants/templ1@one.service"
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+ln -s 'templ1@two.service' "$root/etc/systemd/system/services.target.wants/templ1@two.service"
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+ln -s '../templ1@.service' "$root/etc/systemd/system/services.target.wants/templ1@three.service"
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+ln -s 'templ1@.service' "$root/etc/systemd/system/services.target.wants/templ1@four.service"
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+ln -s '/usr/lib/systemd/system/templ1@.service' "$root/etc/systemd/system/services.target.wants/templ1@five.service"
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+ln -s '/etc/systemd/system/templ1@.service' "$root/etc/systemd/system/services.target.wants/templ1@six.service"
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+ln -s '/run/system/templ1@.service' "$root/etc/systemd/system/services.target.wants/templ1@seven.service"
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+
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+# this should remove all links
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+"$systemctl" --root="$root" disable 'templ1@.service'
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@one.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@two.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@three.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@four.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@five.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@six.service"
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+test ! -h "$root/etc/systemd/system/services.target.wants/templ1@seven.service"
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+
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: -------template enablement for another template-------------
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cat >"$root/etc/systemd/system/templ2@.service" <<EOF
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[Install]
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