From b4effffde8e61be97a9a11dec1c628034207a643 Mon Sep 17 00:00:00 2001 From: Lukasz Majewski Date: Wed, 20 Jan 2021 12:10:42 +0100 Subject: [PATCH] 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 --- sysdeps/unix/sysv/linux/Makefile | 3 +- sysdeps/unix/sysv/linux/tst-clock_adjtime.c | 57 +++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 1 deletion(-) create mode 100644 sysdeps/unix/sysv/linux/tst-clock_adjtime.c diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 51e28b9..d0beb2f 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 0000000..6b9bb99 --- /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 + . */ + +#include +#include +#include +#include +#include + +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 -- 2.7.4