diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-13 08:59:21 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-13 08:59:21 -0700 |
commit | 4541fec3104bef0c60633f9e180be94ea5ccc2b7 (patch) | |
tree | 8a2bb66c4510bf122ca414de22af0a6f98bc36ab /tools/testing/selftests/timers/set-tai.c | |
parent | 39a8804455fb23f09157341d3ba7db6d7ae6ee76 (diff) | |
parent | 2bfd4d1f8c2bee8b0b8832be0c38d3916713625f (diff) |
Merge tag 'linux-kselftest-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan:
"This is a milestone update in a sense. Several new tests and install
and packaging support is added in this update.
This update adds install and packaging tools developed on top of
back-end shared logic enhancemnets to run and install tests. In
addition several timer tests are added.
- New timer tests from John Stultz
- rtc test from Prarit Bhargava
- Enhancements to un and install tests from Michael Ellerman
- Install and packaging tools from Shuah Khan
- Cross-compilation enablement from Tyler Baker
- A couple of bug fixes"
* tag 'linux-kselftest-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (42 commits)
ftracetest: Do not use usleep directly
selftest/mqueue: enable cross compilation
selftest/ipc: enable cross compilation
selftest/memfd: include default header install path
selftest/mount: enable cross compilation
selftest/memfd: enable cross compilation
kselftests: timers: Make set-timer-lat fail more gracefully for !CAP_WAKE_ALARM
selftests: Change memory on-off-test.sh name to be unique
selftests: change cpu on-off-test.sh name to be unique
selftests/mount: Make git ignore all binaries in mount test suite
kselftests: timers: Reduce default runtime on inconsistency-check and set-timer-lat
ftracetest: Convert exit -1 to exit $FAIL
ftracetest: Cope properly with stack tracer not being enabled
tools, update rtctest.c to verify passage of time
Documentation, split up rtc.txt into documentation and test file
selftests: Add tool to generate kselftest tar archive
selftests: Add kselftest install tool
selftests: Set CC using CROSS_COMPILE once in lib.mk
selftests: Add install support for the powerpc tests
selftests/timers: Use shared logic to run and install tests
...
Diffstat (limited to 'tools/testing/selftests/timers/set-tai.c')
-rw-r--r-- | tools/testing/selftests/timers/set-tai.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c new file mode 100644 index 000000000000..dc88dbc8831f --- /dev/null +++ b/tools/testing/selftests/timers/set-tai.c @@ -0,0 +1,79 @@ +/* Set tai offset + * by: John Stultz <john.stultz@linaro.org> + * (C) Copyright Linaro 2013 + * Licensed under the GPLv2 + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + + +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <sys/time.h> +#include <sys/timex.h> +#include <string.h> +#include <signal.h> +#include <unistd.h> +#ifdef KTEST +#include "../kselftest.h" +#else +static inline int ksft_exit_pass(void) +{ + exit(0); +} +static inline int ksft_exit_fail(void) +{ + exit(1); +} +#endif + +int set_tai(int offset) +{ + struct timex tx; + + memset(&tx, 0, sizeof(tx)); + + tx.modes = ADJ_TAI; + tx.constant = offset; + + return adjtimex(&tx); +} + +int get_tai(void) +{ + struct timex tx; + + memset(&tx, 0, sizeof(tx)); + + adjtimex(&tx); + return tx.tai; +} + +int main(int argc, char **argv) +{ + int i, ret; + + ret = get_tai(); + printf("tai offset started at %i\n", ret); + + printf("Checking tai offsets can be properly set: "); + for (i = 1; i <= 60; i++) { + ret = set_tai(i); + ret = get_tai(); + if (ret != i) { + printf("[FAILED] expected: %i got %i\n", i, ret); + return ksft_exit_fail(); + } + } + printf("[OK]\n"); + return ksft_exit_pass(); +} |