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* [glibc] tst: Add test for clock_adjtime
@ 2021-03-09 9:12 Lukasz Majewski
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From: Lukasz Majewski @ 2021-03-09 9:12 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b4effffde8e61be97a9a11dec1c628034207a643
commit b4effffde8e61be97a9a11dec1c628034207a643
Author: Lukasz Majewski <lukma@denx.de>
Date: Wed Jan 20 12:10:42 2021 +0100
tst: Add test for clock_adjtime
This code privides test to check if time on target machine is properly
adjusted.
The time is altered only when cross-test-ssh.sh is executed with
--allow-time-setting flag.
As the delta added to CLOCK_REALTIME is only 1 sec the original time is
not restored and further tests are executed with this bias.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diff:
---
sysdeps/unix/sysv/linux/Makefile | 3 +-
sysdeps/unix/sysv/linux/tst-clock_adjtime.c | 57 +++++++++++++++++++++++++++++
2 files changed, 59 insertions(+), 1 deletion(-)
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index 51e28b97ac..d0beb2f4f5 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -107,7 +107,8 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
test-errno-linux tst-memfd_create tst-mlock2 tst-pkey \
tst-rlimit-infinity tst-ofdlocks tst-gettid tst-gettid-kill \
tst-tgkill tst-sysvsem-linux tst-sysvmsg-linux tst-sysvshm-linux \
- tst-timerfd tst-ppoll tst-futimens tst-utime tst-utimes
+ tst-timerfd tst-ppoll tst-futimens tst-utime tst-utimes \
+ tst-clock_adjtime
tests-internal += tst-ofdlocks-compat tst-sigcontext-get_pc
CFLAGS-tst-sigcontext-get_pc.c = -fasynchronous-unwind-tables
diff --git a/sysdeps/unix/sysv/linux/tst-clock_adjtime.c b/sysdeps/unix/sysv/linux/tst-clock_adjtime.c
new file mode 100644
index 0000000000..6b9bb9940c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-clock_adjtime.c
@@ -0,0 +1,57 @@
+/* Test for clock_adjtime
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <time.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <support/check.h>
+#include <support/timespec.h>
+
+static int
+do_test (void)
+{
+ struct timespec tv_then, tv_now;
+ struct timex delta;
+
+ /* Check if altering target time is allowed. */
+ if (getenv (SETTIME_ENV_NAME) == NULL)
+ FAIL_UNSUPPORTED ("clock_adjtime is executed only when "\
+ SETTIME_ENV_NAME" is set\n");
+
+ tv_then = xclock_now (CLOCK_REALTIME);
+
+ /* Setup time value to adjust - 1 sec. */
+ delta.time.tv_sec = 1;
+ delta.time.tv_usec = 0;
+ delta.modes = ADJ_SETOFFSET;
+
+ int ret = clock_adjtime (CLOCK_REALTIME, &delta);
+ if (ret == -1)
+ FAIL_EXIT1 ("clock_adjtime failed: %m\n");
+
+ tv_now = xclock_now (CLOCK_REALTIME);
+
+ /* Check if clock_adjtime adjusted the system time. */
+ struct timespec r = timespec_sub (tv_now, tv_then);
+ TEST_COMPARE (support_timespec_check_in_range
+ ((struct timespec) { 1, 0 }, r, 0.9, 1.1), 1);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
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