b0d29bc47d
Having kyua in the base system will simplify automated testing in CI and eliminates bootstrapping issues on new platforms. The build of kyua is controlled by WITH(OUT)_TESTS_SUPPORT. Reviewed by: emaste Obtained from: CheriBSD Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D24103
107 lines
3.5 KiB
C++
107 lines
3.5 KiB
C++
// Copyright 2010 The Kyua Authors.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "utils/signals/misc.hpp"
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#if defined(HAVE_CONFIG_H)
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# include "config.h"
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#endif
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extern "C" {
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#include <signal.h>
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}
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#include <cerrno>
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#include <cstddef>
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#include "utils/format/macros.hpp"
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#include "utils/logging/macros.hpp"
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#include "utils/signals/exceptions.hpp"
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namespace signals = utils::signals;
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/// Number of the last valid signal.
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const int utils::signals::last_signo = LAST_SIGNO;
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/// Resets a signal handler to its default behavior.
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///
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/// \param signo The number of the signal handler to reset.
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///
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/// \throw signals::system_error If there is a problem trying to reset the
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/// signal handler to its default behavior.
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void
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signals::reset(const int signo)
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{
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struct ::sigaction sa;
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sa.sa_handler = SIG_DFL;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if (::sigaction(signo, &sa, NULL) == -1) {
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const int original_errno = errno;
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throw system_error(F("Failed to reset signal %s") % signo,
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original_errno);
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}
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}
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/// Resets all signals to their default handlers.
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///
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/// \return True if all signals could be reset properly; false otherwise.
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bool
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signals::reset_all(void)
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{
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bool ok = true;
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for (int signo = 1; signo <= signals::last_signo; ++signo) {
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if (signo == SIGKILL || signo == SIGSTOP) {
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// Don't attempt to reset immutable signals.
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} else {
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try {
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signals::reset(signo);
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} catch (const signals::error& e) {
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#if defined(SIGTHR)
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if (signo == SIGTHR) {
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// If FreeBSD's libthr is loaded, it prevents us from
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// modifying SIGTHR (at least in 11.0-CURRENT as of
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// 2015-01-28). Skip failures for this signal if they
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// happen to avoid this corner case.
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continue;
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}
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#endif
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LW(e.what());
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ok = false;
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}
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}
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}
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return ok;
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}
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