Viewing file:  InstanceDirToucher.cpp (4.96 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Phusion Passenger - https://www.phusionpassenger.com/
* Copyright (c) 2010-2017 Phusion Holding B.V.
*
* "Passenger", "Phusion Passenger" and "Union Station" are registered
* trademarks of Phusion Holding B.V.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <boost/bind.hpp>
#include <Shared/Fundamentals/Utils.h>
#include <Utils/AsyncSignalSafeUtils.h>
/**
* Touch all files in the server instance dir every 6 hours in order to prevent /tmp
* cleaners from weaking havoc:
* http://code.google.com/p/phusion-passenger/issues/detail?id=365
*/
class InstanceDirToucher {
private:
WorkingObjectsPtr wo;
oxt::thread *thr;
static void afterFork(const StaticString &originalOomScore, const char *workingDir) {
namespace ASSU = AsyncSignalSafeUtils;
int prio, ret, e;
// Make process nicer.
do {
prio = getpriority(PRIO_PROCESS, getpid());
} while (prio == -1 && errno == EINTR);
if (prio != -1) {
prio++;
if (prio > 20) {
prio = 20;
}
do {
ret = setpriority(PRIO_PROCESS, getpid(), prio);
} while (ret == -1 && errno == EINTR);
} else {
char buf[1024];
char *pos = buf;
const char *end = buf + sizeof(buf);
e = errno;
pos = ASSU::appendData(pos, end, "getpriority() failed: ");
pos = ASSU::appendData(pos, end, ASSU::limitedStrerror(e));
pos = ASSU::appendData(pos, end, " (errno=");
pos = ASSU::appendInteger<int, 10>(pos, end, e);
pos = ASSU::appendData(pos, end, ")");
ASSU::printError(buf, pos - buf);
}
do {
ret = chdir(workingDir);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
char buf[1024];
char *pos = buf;
const char *end = buf + sizeof(buf);
e = errno;
pos = ASSU::appendData(pos, end, "chdir(\"");
pos = ASSU::appendData(pos, end, workingDir);
pos = ASSU::appendData(pos, end, "\") failed: ");
pos = ASSU::appendData(pos, end, ASSU::limitedStrerror(e));
pos = ASSU::appendData(pos, end, " (errno=");
pos = ASSU::appendInteger<int, 10>(pos, end, e);
pos = ASSU::appendData(pos, end, ")");
ASSU::printError(buf, pos - buf);
_exit(1);
}
#if !BOOST_OS_MACOS
bool isLegacy;
ret = tryRestoreOomScore(originalOomScore, isLegacy);
if (ret != 0) {
char buf[1024];
char *pos = buf;
const char *end = buf + sizeof(buf);
pos = ASSU::appendData(pos, end, "Unable to set OOM score to ");
pos = ASSU::appendData(pos, end, originalOomScore.data(), originalOomScore.size());
pos = ASSU::appendData(pos, end, " (legacy: ");
pos = ASSU::appendData(pos, end, isLegacy ? "true" : "false");
pos = ASSU::appendData(pos, end, ") due to error: ");
pos = ASSU::appendData(pos, end, ASSU::limitedStrerror(ret));
pos = ASSU::appendData(pos, end, " (errno=");
pos = ASSU::appendInteger<int, 10>(pos, end, ret);
pos = ASSU::appendData(pos, end, "). Process will remain at inherited OOM score.");
ASSU::printError(buf, pos - buf);
}
#endif
}
void
threadMain() {
string originalOomScore = wo->extraConfigToPassToSubAgents["oom_score"].asString();
string workingDir = wo->instanceDir->getPath().c_str();
while (!boost::this_thread::interruption_requested()) {
syscalls::sleep(60 * 60);
begin_touch:
try {
const char *command[] = {
"/bin/sh",
"-c",
"find . | xargs touch",
NULL
};
SubprocessInfo info;
runCommand(command, info, true, true,
boost::bind(afterFork, originalOomScore, workingDir.c_str()));
} catch (const SystemException &e) {
P_WARN("Could not touch the " PROGRAM_NAME " instance directory ("
<< e.what() << "). Retrying in 2 minutes...");
syscalls::sleep(60 * 2);
goto begin_touch;
}
}
}
public:
InstanceDirToucher(const WorkingObjectsPtr &wo) {
this->wo = wo;
thr = new oxt::thread(boost::bind(&InstanceDirToucher::threadMain, this),
"Server instance dir toucher", 256 * 1024);
}
~InstanceDirToucher() {
thr->interrupt_and_join();
delete thr;
}
};
typedef boost::shared_ptr<InstanceDirToucher> InstanceDirToucherPtr;
|