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