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namespace-util: port namespace_get_leader() to PidRef

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This commit is contained in:
Lennart Poettering
2025-01-10 14:22:49 +01:00
parent 47e45ea738
commit 0b8b13324e
4 changed files with 94 additions and 23 deletions
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src/test/test-namespace.c
+49
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@@ -9,6 +9,7 @@
#include "fd-util.h"
#include "fileio.h"
#include "namespace.h"
#include "pidref.h"
#include "process-util.h"
#include "string-util.h"
#include "tests.h"
@@ -365,6 +366,54 @@ TEST(process_is_owned_by_uid) {
ASSERT_OK(pidref_wait_for_terminate(&pid, /* ret= */ NULL));
}
TEST(namespace_get_leader) {
int r;
_cleanup_(pidref_done) PidRef original = PIDREF_NULL;
ASSERT_OK(pidref_set_self(&original));
_cleanup_(pidref_done) PidRef pid = PIDREF_NULL;
r = pidref_safe_fork("(child)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGKILL|FORK_NEW_MOUNTNS|FORK_WAIT|FORK_LOG, &pid);
ASSERT_OK(r);
if (r == 0) {
_cleanup_(pidref_done) PidRef pid2 = PIDREF_NULL;
r = pidref_safe_fork("(child)", FORK_RESET_SIGNALS|FORK_DEATHSIG_SIGKILL|FORK_WAIT|FORK_LOG, &pid2);
ASSERT_OK(r);
if (r == 0) {
log_info("PID hierarchy: " PID_FMT " ← " PID_FMT " ← " PID_FMT, original.pid, pid.pid, pid2.pid);
_cleanup_(pidref_done) PidRef self = PIDREF_NULL;
ASSERT_OK(pidref_set_self(&self));
ASSERT_TRUE(pidref_equal(&self, &pid2));
_cleanup_(pidref_done) PidRef parent = PIDREF_NULL;
ASSERT_OK(pidref_set_parent(&parent));
ASSERT_TRUE(pidref_equal(&parent, &pid));
ASSERT_TRUE(!pidref_equal(&self, &pid));
ASSERT_TRUE(!pidref_equal(&self, &parent));
_cleanup_(pidref_done) PidRef grandparent = PIDREF_NULL;
ASSERT_OK(pidref_get_ppid_as_pidref(&parent, &grandparent));
ASSERT_TRUE(pidref_equal(&grandparent, &original));
ASSERT_TRUE(!pidref_equal(&grandparent, &self));
ASSERT_TRUE(!pidref_equal(&grandparent, &pid));
ASSERT_TRUE(!pidref_equal(&grandparent, &pid2));
ASSERT_TRUE(!pidref_equal(&grandparent, &parent));
_cleanup_(pidref_done) PidRef leader = PIDREF_NULL;
ASSERT_OK(namespace_get_leader(&self, NAMESPACE_MOUNT, &leader));
ASSERT_TRUE(pidref_equal(&parent, &leader));
ASSERT_TRUE(pidref_equal(&pid, &leader));
ASSERT_TRUE(!pidref_equal(&self, &leader));
ASSERT_TRUE(!pidref_equal(&pid2, &leader));
ASSERT_TRUE(!pidref_equal(&original, &leader));
ASSERT_TRUE(!pidref_equal(&grandparent, &leader));
}
}
}
static int intro(void) {
if (!have_namespaces())
return log_tests_skipped("Don't have namespace support or lacking privileges");