00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
266 lines
8.4 KiB
C++
266 lines
8.4 KiB
C++
//
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// Automated Testing Framework (atf)
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//
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// Copyright (c) 2007 The NetBSD Foundation, Inc.
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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
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// are met:
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// 1. 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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// 2. 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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//
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// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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// CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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// IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#if defined(HAVE_CONFIG_H)
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#include "bconfig.h"
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#endif
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extern "C" {
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <unistd.h>
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}
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#include <cerrno>
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#include <cstdlib>
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#include <cstring>
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#include "atf-c++/detail/auto_array.hpp"
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#include "atf-c++/detail/process.hpp"
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#include "atf-c++/detail/sanity.hpp"
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#include "fs.hpp"
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#include "user.hpp"
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namespace impl = atf::atf_run;
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#define IMPL_NAME "atf::atf_run"
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// ------------------------------------------------------------------------
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// Auxiliary functions.
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// ------------------------------------------------------------------------
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static void cleanup_aux(const atf::fs::path&, dev_t, bool);
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static void cleanup_aux_dir(const atf::fs::path&, const atf::fs::file_info&,
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bool);
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static void do_unmount(const atf::fs::path&);
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// The cleanup routines below are tricky: they are executed immediately after
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// a test case's death, and after we have forcibly killed any stale processes.
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// However, even if the processes are dead, this does not mean that the file
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// system we are scanning is stable. In particular, if the test case has
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// mounted file systems through fuse/puffs, the fact that the processes died
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// does not mean that the file system is truly unmounted.
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//
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// The code below attempts to cope with this by catching errors and either
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// ignoring them or retrying the actions on the same file/directory a few times
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// before giving up.
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static const int max_retries = 5;
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static const int retry_delay_in_seconds = 1;
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// The erase parameter in this routine is to control nested mount points.
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// We want to descend into a mount point to unmount anything that is
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// mounted under it, but we do not want to delete any files while doing
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// this traversal. In other words, we erase files until we cross the
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// first mount point, and after that point we only scan and unmount.
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static
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void
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cleanup_aux(const atf::fs::path& p, dev_t parent_device, bool erase)
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{
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try {
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atf::fs::file_info fi(p);
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if (fi.get_type() == atf::fs::file_info::dir_type)
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cleanup_aux_dir(p, fi, fi.get_device() == parent_device);
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if (fi.get_device() != parent_device)
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do_unmount(p);
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if (erase) {
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if (fi.get_type() == atf::fs::file_info::dir_type)
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atf::fs::rmdir(p);
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else
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atf::fs::remove(p);
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}
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} catch (const atf::system_error& e) {
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if (e.code() != ENOENT && e.code() != ENOTDIR)
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throw e;
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}
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}
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static
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void
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cleanup_aux_dir(const atf::fs::path& p, const atf::fs::file_info& fi,
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bool erase)
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{
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if (erase && ((fi.get_mode() & S_IRWXU) != S_IRWXU)) {
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int retries = max_retries;
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retry_chmod:
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if (chmod(p.c_str(), fi.get_mode() | S_IRWXU) == -1) {
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if (retries > 0) {
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retries--;
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::sleep(retry_delay_in_seconds);
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goto retry_chmod;
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} else {
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throw atf::system_error(IMPL_NAME "::cleanup(" +
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p.str() + ")", "chmod(2) failed",
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errno);
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}
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}
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}
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std::set< std::string > subdirs;
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{
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bool ok = false;
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int retries = max_retries;
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while (!ok) {
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INV(retries > 0);
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try {
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const atf::fs::directory d(p);
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subdirs = d.names();
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ok = true;
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} catch (const atf::system_error& e) {
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retries--;
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if (retries == 0)
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throw e;
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::sleep(retry_delay_in_seconds);
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}
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}
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INV(ok);
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}
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for (std::set< std::string >::const_iterator iter = subdirs.begin();
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iter != subdirs.end(); iter++) {
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const std::string& name = *iter;
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if (name != "." && name != "..")
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cleanup_aux(p / name, fi.get_device(), erase);
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}
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}
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static
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void
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do_unmount(const atf::fs::path& in_path)
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{
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// At least, FreeBSD's unmount(2) requires the path to be absolute.
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// Let's make it absolute in all cases just to be safe that this does
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// not affect other systems.
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const atf::fs::path& abs_path = in_path.is_absolute() ?
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in_path : in_path.to_absolute();
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#if defined(HAVE_UNMOUNT)
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int retries = max_retries;
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retry_unmount:
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if (unmount(abs_path.c_str(), 0) == -1) {
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if (errno == EBUSY && retries > 0) {
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retries--;
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::sleep(retry_delay_in_seconds);
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goto retry_unmount;
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} else {
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throw atf::system_error(IMPL_NAME "::cleanup(" + in_path.str() +
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")", "unmount(2) failed", errno);
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}
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}
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#else
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// We could use umount(2) instead if it was available... but
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// trying to do so under, e.g. Linux, is a nightmare because we
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// also have to update /etc/mtab to match what we did. It is
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// satf::fser to just leave the system-specific umount(8) tool deal
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// with it, at least for now.
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const atf::fs::path prog("umount");
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atf::process::argv_array argv("umount", abs_path.c_str(), NULL);
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atf::process::status s = atf::process::exec(prog, argv,
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atf::process::stream_inherit(), atf::process::stream_inherit());
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if (!s.exited() || s.exitstatus() != EXIT_SUCCESS)
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throw std::runtime_error("Call to unmount failed");
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#endif
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}
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// ------------------------------------------------------------------------
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// The "temp_dir" class.
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// ------------------------------------------------------------------------
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impl::temp_dir::temp_dir(const atf::fs::path& p)
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{
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atf::auto_array< char > buf(new char[p.str().length() + 1]);
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std::strcpy(buf.get(), p.c_str());
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if (::mkdtemp(buf.get()) == NULL)
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throw system_error(IMPL_NAME "::temp_dir::temp_dir(" +
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p.str() + ")", "mkdtemp(3) failed",
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errno);
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m_path.reset(new atf::fs::path(buf.get()));
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}
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impl::temp_dir::~temp_dir(void)
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{
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cleanup(*m_path);
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}
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const atf::fs::path&
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impl::temp_dir::get_path(void)
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const
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{
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return *m_path;
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}
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// ------------------------------------------------------------------------
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// Free functions.
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// ------------------------------------------------------------------------
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atf::fs::path
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impl::change_directory(const atf::fs::path& dir)
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{
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atf::fs::path olddir = get_current_dir();
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if (olddir != dir) {
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if (::chdir(dir.c_str()) == -1)
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throw system_error(IMPL_NAME "::chdir(" + dir.str() + ")",
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"chdir(2) failed", errno);
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}
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return olddir;
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}
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void
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impl::cleanup(const atf::fs::path& p)
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{
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atf::fs::file_info fi(p);
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cleanup_aux(p, fi.get_device(), true);
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}
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atf::fs::path
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impl::get_current_dir(void)
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{
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std::auto_ptr< char > cwd;
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#if defined(HAVE_GETCWD_DYN)
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cwd.reset(getcwd(NULL, 0));
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#else
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cwd.reset(getcwd(NULL, MAXPATHLEN));
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#endif
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if (cwd.get() == NULL)
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throw atf::system_error(IMPL_NAME "::get_current_dir()",
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"getcwd() failed", errno);
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return atf::fs::path(cwd.get());
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}
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