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Merge pull request #15033 from yuwata/state-directory-migrate-issue

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execute: Fix migration from DynamicUser=yes to no
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-03-09 17:34:55 +01:00 committed by GitHub
commit 908055f61f
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2 changed files with 12 additions and 2 deletions
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13
src/core/execute.c
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@ -2247,7 +2247,7 @@ static int setup_exec_directory(
if (type != EXEC_DIRECTORY_CONFIGURATION &&
readlink_and_make_absolute(p, &target) >= 0) {
_cleanup_free_ char *q = NULL;
_cleanup_free_ char *q = NULL, *q_resolved = NULL, *target_resolved = NULL;
/* This already exists and is a symlink? Interesting. Maybe it's one created
* by DynamicUser=1 (see above)?
@ -2256,13 +2256,22 @@ static int setup_exec_directory(
* since they all support the private/ symlink logic at least in some
* configurations, see above. */
r = chase_symlinks(target, NULL, 0, &target_resolved, NULL);
if (r < 0)
goto fail;
q = path_join(params->prefix[type], "private", *rt);
if (!q) {
r = -ENOMEM;
goto fail;
}
if (path_equal(q, target)) {
/* /var/lib or friends may be symlinks. So, let's chase them also. */
r = chase_symlinks(q, NULL, CHASE_NONEXISTENT, &q_resolved, NULL);
if (r < 0)
goto fail;
if (path_equal(q_resolved, target_resolved)) {
/* Hmm, apparently DynamicUser= was once turned on for this service,
* but is no longer. Let's move the directory back up. */

1
src/test/test-execute.c
View File

@ -561,6 +561,7 @@ static void test_exec_dynamicuser(Manager *m) {
test(__func__, m, "exec-dynamicuser-statedir-migrate-step1.service", 0, CLD_EXITED);
test(__func__, m, "exec-dynamicuser-statedir-migrate-step2.service", can_unshare ? 0 : EXIT_NAMESPACE, CLD_EXITED);
test(__func__, m, "exec-dynamicuser-statedir-migrate-step1.service", 0, CLD_EXITED);
(void) rm_rf("/var/lib/test-dynamicuser-migrate", REMOVE_ROOT|REMOVE_PHYSICAL);
(void) rm_rf("/var/lib/test-dynamicuser-migrate2", REMOVE_ROOT|REMOVE_PHYSICAL);