Dear Community,
> This change adds new test to assess sigtimedwait's timeout related
> functionality - the sigset_t is configured for SIGUSR1, which will
> not be triggered, so sigtimedwait just waits for timeout.
>
> To be more specific - two use cases are checked:
> - if sigtimedwait times out immediately when passed struct timespec
> has zero values of tv_nsec and tv_sec.
> - if sigtimedwait times out after timeout specified in passed argument
Gentle ping on this test.
> ---
> sysdeps/unix/sysv/linux/Makefile | 5 +-
> sysdeps/unix/sysv/linux/tst-sigtimedwait.c | 61
> ++++++++++++++++++++++ 2 files changed, 64 insertions(+), 2
> deletions(-) create mode 100644
> sysdeps/unix/sysv/linux/tst-sigtimedwait.c
>
> diff --git a/sysdeps/unix/sysv/linux/Makefile
> b/sysdeps/unix/sysv/linux/Makefile index 41798feb35..a3eba0db01 100644
> --- a/sysdeps/unix/sysv/linux/Makefile
> +++ b/sysdeps/unix/sysv/linux/Makefile
> @@ -113,8 +113,9 @@ tests += tst-clone tst-clone2 tst-clone3
> tst-fanotify tst-personality \ tst-tgkill tst-sysvsem-linux
> tst-sysvmsg-linux tst-sysvshm-linux \ tst-timerfd tst-ppoll
> tst-futimens tst-utime tst-utimes \ tst-clock_adjtime tst-adjtimex
> tst-ntp_adjtime tst-futimes \
> - tst-lutimes tst-ntp_gettime tst-ntp_gettimex tst-getrusage
> -
> + tst-lutimes tst-ntp_gettime tst-ntp_gettimex tst-getrusage \
> + tst-sigtimedwait
> +
> # Test for the symbol version of fcntl that was replaced in glibc
> 2.28. ifeq ($(have-GLIBC_2.27)$(build-shared),yesyes)
> tests += tst-ofdlocks-compat
> diff --git a/sysdeps/unix/sysv/linux/tst-sigtimedwait.c
> b/sysdeps/unix/sysv/linux/tst-sigtimedwait.c new file mode 100644
> index 0000000000..95a1b59592
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/tst-sigtimedwait.c
> @@ -0,0 +1,61 @@
> +/* Test for sigtimedwait timeout
> + 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
> +#include
> +#include
> +
> +static int test_sigtimedwait_timeout (bool zero_tmo)
> +{
> + /* We wait for half a second. */
> + struct timespec ts;
> + xclock_gettime (CLOCK_REALTIME, &ts);
> + struct timespec timeout = make_timespec (0, zero_tmo ? 0 :
> TIMESPEC_HZ/2);
> + ts = timespec_add (ts, timeout);
> +
> + /* Set sigset to just wait for timeout. */
> + sigset_t ss_usr1;
> + sigemptyset (&ss_usr1);
> + sigaddset (&ss_usr1, SIGUSR1);
> +
> + int ret = sigtimedwait (&ss_usr1, NULL, &timeout);
> + if (ret != -1)
> + FAIL_EXIT1 ("sigtimedwait failed: %m\n");
> +
> + TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
> +
> + return 0;
> +}
> +
> +static int
> +do_test (void)
> +{
> + /* Check if sigtimedwait exits immediately. */
> + test_sigtimedwait_timeout (true);
> +
> + /* Check if sigtimedwait exits after specified timeout. */
> + test_sigtimedwait_timeout (false);
> +
> + return 0;
> +}
> +
> +#include
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de