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From 1f8b1e35e3ec80c50201403171b7375ff14c808c Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekletar@users.noreply.github.com>
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Date: Tue, 26 Jul 2016 14:25:52 +0200
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Subject: [PATCH] systemctl: allow disable on the unit file path, but warn
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about it (#3806)
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systemd now returns an error when it is asked to perform disable on the
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unit file path. In the past this was allowed, but systemd never really
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considered an actual content of the [Install] section of the unit
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file. Instead it performed disable on the unit name, i.e. purged all
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symlinks pointing to the given unit file (undo of implicit link action
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done by systemd when enable is called on the unit file path) and all
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symlinks that have the same basename as the given unit file.
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However, to notice that [Install] info of the file is not consulted one
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must create additional symlinks manually. I argue that in most cases
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users do not create such links. Let's be nice to our users and don't
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break existing scripts that expect disable to work with the unit file
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path.
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Fixes #3706.
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IMPORTANT
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=========
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Note that in this downstream backport we actually pass false to
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normalize_names(), hence it will not produce any warning when full path
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is passed in. This is because we need to preserve behavior compatible
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with prior systemd versions shipped in RHEL.
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Cherry-picked from: 1d3c86c06fca8311923fcf81af0ab0bbb66e1edd
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Resolves: #1348208
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---
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src/systemctl/systemctl.c | 29 +++++++++++++++++++++++++++++
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1 file changed, 29 insertions(+)
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diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
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index b7496c006..58998185c 100644
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--- a/src/systemctl/systemctl.c
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+++ b/src/systemctl/systemctl.c
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@@ -5333,6 +5333,29 @@ static int mangle_names(char **original_names, char ***mangled_names) {
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return 0;
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}
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+static int normalize_names(char **names, bool warn_if_path) {
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+ char **u;
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+ bool was_path = false;
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+
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+ STRV_FOREACH(u, names) {
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+ int r;
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+
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+ if (!is_path(*u))
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+ continue;
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+
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+ r = free_and_strdup(u, basename(*u));
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+ if (r < 0)
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+ return log_error_errno(r, "Failed to normalize unit file path: %m");
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+
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+ was_path = true;
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+ }
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+
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+ if (warn_if_path && was_path)
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+ log_warning("Warning: Can't execute disable on the unit file path. Proceeding with the unit name.");
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+
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+ return 0;
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+}
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+
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static int enable_unit(sd_bus *bus, char **args) {
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_cleanup_strv_free_ char **names = NULL;
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const char *verb = args[0];
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@@ -5357,6 +5380,12 @@ static int enable_unit(sd_bus *bus, char **args) {
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if (strv_isempty(names))
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return 0;
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+ if (streq(verb, "disable")) {
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+ r = normalize_names(names, false);
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+ if (r < 0)
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+ return r;
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+ }
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+
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if (!bus || avoid_bus()) {
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if (streq(verb, "enable")) {
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r = unit_file_enable(arg_scope, arg_runtime, arg_root, names, arg_force, &changes, &n_changes);
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