1 | /* Test for timerfd related functions |
2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <intprops.h> |
21 | #include <time.h> |
22 | #include <support/check.h> |
23 | #include <support/support.h> |
24 | #include <support/xunistd.h> |
25 | #include <support/timespec.h> |
26 | #include <sys/time.h> |
27 | #include <sys/timerfd.h> |
28 | |
29 | static void |
30 | timerfd_test (void) |
31 | { |
32 | struct itimerspec settings = { { 0, 0 }, { 2, 0 } }; |
33 | struct itimerspec val; |
34 | int fd, ret; |
35 | |
36 | fd = timerfd_create (CLOCK_REALTIME, flags: 0); |
37 | if (fd < 0) |
38 | FAIL_EXIT1 ("*** timerfd_create failed: %m" ); |
39 | |
40 | /* Set the timer. */ |
41 | ret = timerfd_settime (ufd: fd, flags: 0, utmr: &settings, NULL); |
42 | if (ret != 0) |
43 | FAIL_EXIT1 ("*** timerfd_settime failed: %m\n" ); |
44 | |
45 | /* Sleep for 1 second. */ |
46 | ret = usleep (useconds: 1000000); |
47 | if (ret != 0) |
48 | FAIL_EXIT1 ("*** usleep failed: %m\n" ); |
49 | |
50 | /* Read the timer just after sleep. */ |
51 | ret = timerfd_gettime (ufd: fd, otmr: &val); |
52 | if (ret != 0) |
53 | FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n" ); |
54 | |
55 | /* Check difference between timerfd_gettime calls. */ |
56 | TEST_COMPARE (support_timespec_check_in_range |
57 | ((struct timespec) { 1, 0 }, val.it_value, 0.9, 1.0), 1); |
58 | |
59 | xclose (fd); |
60 | } |
61 | |
62 | static void |
63 | timerfd_large_timeout (void) |
64 | { |
65 | int fd = timerfd_create (CLOCK_REALTIME, flags: 0); |
66 | TEST_VERIFY (fd != -1); |
67 | support_create_timer (sec: 0, nsec: 100000000, false, NULL); |
68 | struct itimerspec it = { { 0, 0 }, { TYPE_MAXIMUM (time_t), 0 } }; |
69 | int r = timerfd_settime (ufd: fd, flags: 0, utmr: &it, NULL); |
70 | if (r == 0) |
71 | { |
72 | uint64_t buf; |
73 | TEST_COMPARE (read (fd, &buf, sizeof (buf)), -1); |
74 | TEST_VERIFY (errno == EINTR); |
75 | } |
76 | else |
77 | TEST_COMPARE (errno, EOVERFLOW); |
78 | } |
79 | |
80 | static int |
81 | do_test (void) |
82 | { |
83 | timerfd_test (); |
84 | timerfd_large_timeout (); |
85 | return 0; |
86 | } |
87 | |
88 | #include <support/test-driver.c> |
89 | |