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test-login: skip consistency checks when logind is not active
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There are two ways in swich sd_login_* functions acquire data:
some are derived from the cgroup path, but others use the data serialized
by logind.

When the tests are executed under Fedora's mock, without systemd-spawn
but instead in a traditional chroot, test-login gets confused:
the "outside" cgroup path is visible, so sd_pid_get_unit() and
sd_pid_get_session() work, but sd_session_is_active() and other functions
that need logind data fail.

Such a buildroot setup is fairly bad, but it can be encountered in the wild, so
let's just skip the tests in that case.

/* Information printed is from the live system */
sd_pid_get_unit(0, …) → "session-237.scope"
sd_pid_get_user_unit(0, …) → "n/a"
sd_pid_get_slice(0, …) → "user-1000.slice"
sd_pid_get_session(0, …) → "237"
sd_pid_get_owner_uid(0, …) → 1000
sd_pid_get_cgroup(0, …) → "/user.slice/user-1000.slice/session-237.scope"
sd_uid_get_display(1000, …) → "(null)"
sd_uid_get_sessions(1000, …) → [0] ""
sd_uid_get_seats(1000, …) → [0] ""
Assertion 'r >= 0' failed at src/libsystemd/sd-login/test-login.c:104, function test_login(). Aborting.
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@keszybz
keszybz committed Dec 16, 2020
1 parent 2210191 commit ac56446
Showing 1 changed file with 54 additions and 48 deletions.
102 changes: 54 additions & 48 deletions src/libsystemd/sd-login/test-login.c
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Original file line number Diff line number Diff line change
Expand Up @@ -112,68 +112,74 @@ static void test_login(void) {

if (session) {
r = sd_session_is_active(session);
assert_se(r >= 0);
log_info("sd_session_is_active(\"%s\") → %s", session, yes_no(r));
if (r == -ENXIO)
log_notice("sd_session_is_active() failed with ENXIO, it seems logind is not running.");
else {
/* All those tests will fail with ENXIO, so let's skip them. */

r = sd_session_is_remote(session);
assert_se(r >= 0);
log_info("sd_session_is_remote(\"%s\") → %s", session, yes_no(r));
assert_se(r >= 0);
log_info("sd_session_is_active(\"%s\") → %s", session, yes_no(r));

r = sd_session_get_state(session, &state);
assert_se(r == 0);
log_info("sd_session_get_state(\"%s\") → \"%s\"", session, state);
r = sd_session_is_remote(session);
assert_se(r >= 0);
log_info("sd_session_is_remote(\"%s\") → %s", session, yes_no(r));

assert_se(sd_session_get_uid(session, &u) >= 0);
log_info("sd_session_get_uid(\"%s\") → "UID_FMT, session, u);
assert_se(u == u2);
r = sd_session_get_state(session, &state);
assert_se(r == 0);
log_info("sd_session_get_state(\"%s\") → \"%s\"", session, state);

assert_se(sd_session_get_type(session, &type) >= 0);
log_info("sd_session_get_type(\"%s\") → \"%s\"", session, type);
assert_se(sd_session_get_uid(session, &u) >= 0);
log_info("sd_session_get_uid(\"%s\") → "UID_FMT, session, u);
assert_se(u == u2);

assert_se(sd_session_get_class(session, &class) >= 0);
log_info("sd_session_get_class(\"%s\") → \"%s\"", session, class);
assert_se(sd_session_get_type(session, &type) >= 0);
log_info("sd_session_get_type(\"%s\") → \"%s\"", session, type);

r = sd_session_get_display(session, &display);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_display(\"%s\") → \"%s\"", session, strna(display));
assert_se(sd_session_get_class(session, &class) >= 0);
log_info("sd_session_get_class(\"%s\") → \"%s\"", session, class);

r = sd_session_get_remote_user(session, &remote_user);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_remote_user(\"%s\") → \"%s\"",
session, strna(remote_user));
r = sd_session_get_display(session, &display);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_display(\"%s\") → \"%s\"", session, strna(display));

r = sd_session_get_remote_host(session, &remote_host);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_remote_host(\"%s\") → \"%s\"",
session, strna(remote_host));
r = sd_session_get_remote_user(session, &remote_user);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_remote_user(\"%s\") → \"%s\"",
session, strna(remote_user));

r = sd_session_get_seat(session, &seat);
if (r >= 0) {
assert_se(seat);
r = sd_session_get_remote_host(session, &remote_host);
assert_se(IN_SET(r, 0, -ENODATA));
log_info("sd_session_get_remote_host(\"%s\") → \"%s\"",
session, strna(remote_host));

log_info("sd_session_get_seat(\"%s\") → \"%s\"", session, seat);
r = sd_session_get_seat(session, &seat);
if (r >= 0) {
assert_se(seat);

log_info("sd_session_get_seat(\"%s\") → \"%s\"", session, seat);

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
r = sd_seat_can_multi_session(seat);
r = sd_seat_can_multi_session(seat);
#pragma GCC diagnostic pop
assert_se(r == 1);
log_info("sd_session_can_multi_seat(\"%s\") → %s", seat, yes_no(r));

r = sd_seat_can_tty(seat);
assert_se(r >= 0);
log_info("sd_session_can_tty(\"%s\") → %s", seat, yes_no(r));

r = sd_seat_can_graphical(seat);
assert_se(r >= 0);
log_info("sd_session_can_graphical(\"%s\") → %s", seat, yes_no(r));
} else {
log_info_errno(r, "sd_session_get_seat(\"%s\"): %m", session);
assert_se(r == -ENODATA);
assert_se(r == 1);
log_info("sd_session_can_multi_seat(\"%s\") → %s", seat, yes_no(r));

r = sd_seat_can_tty(seat);
assert_se(r >= 0);
log_info("sd_session_can_tty(\"%s\") → %s", seat, yes_no(r));

r = sd_seat_can_graphical(seat);
assert_se(r >= 0);
log_info("sd_session_can_graphical(\"%s\") → %s", seat, yes_no(r));
} else {
log_info_errno(r, "sd_session_get_seat(\"%s\"): %m", session);
assert_se(r == -ENODATA);
}

assert_se(sd_uid_get_state(u, &state2) == 0);
log_info("sd_uid_get_state("UID_FMT", …) → %s", u, state2);
}

assert_se(sd_uid_get_state(u, &state2) == 0);
log_info("sd_uid_get_state("UID_FMT", …) → %s", u, state2);
}

if (seat) {
Expand Down Expand Up @@ -214,7 +220,7 @@ static void test_login(void) {
assert_se(sd_get_seats(NULL) == r);

r = sd_seat_get_active(NULL, &t, NULL);
assert_se(IN_SET(r, 0, -ENODATA));
assert_se(IN_SET(r, 0, -ENODATA, -ENXIO));
log_info("sd_seat_get_active(NULL, …) (active session on current seat) → %s / \"%s\"", e(r), strnull(t));
free(t);

Expand Down

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