blob: 963cc4df9bf66c7349cc68d2c59a7ec5ba3b5957 [file] [log] [blame]
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ueventd.h"
#include <ctype.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <selinux/selinux.h>
#include "devices.h"
#include "log.h"
#include "util.h"
template <bool sysfs>
static bool ParseSingleLine(std::vector<std::string>&& line, std::string* err);
int ueventd_main(int argc, char **argv)
{
/*
* init sets the umask to 077 for forked processes. We need to
* create files with exact permissions, without modification by
* the umask.
*/
umask(000);
/* Prevent fire-and-forget children from becoming zombies.
* If we should need to wait() for some children in the future
* (as opposed to none right now), double-forking here instead
* of ignoring SIGCHLD may be the better solution.
*/
signal(SIGCHLD, SIG_IGN);
InitKernelLogging(argv);
LOG(INFO) << "ueventd started!";
selinux_callback cb;
cb.func_log = selinux_klog_callback;
selinux_set_callback(SELINUX_CB_LOG, cb);
Parser& parser = Parser::GetInstance();
parser.AddSectionParser("subsystem", std::make_unique<SubsystemParser>());
using namespace std::placeholders;
parser.AddSingleLineParser("/sys/", std::bind(ParsePermissionsLine, _1, _2, true));
parser.AddSingleLineParser("/dev/", std::bind(ParsePermissionsLine, _1, _2, false));
parser.ParseConfig("/ueventd.rc");
parser.ParseConfig("/vendor/ueventd.rc");
parser.ParseConfig("/odm/ueventd.rc");
/*
* keep the current product name base configuration so
* we remain backwards compatible and allow it to override
* everything
* TODO: cleanup platform ueventd.rc to remove vendor specific
* device node entries (b/34968103)
*/
std::string hardware = android::base::GetProperty("ro.hardware", "");
parser.ParseConfig("/ueventd." + hardware + ".rc");
device_init();
pollfd ufd;
ufd.events = POLLIN;
ufd.fd = get_device_fd();
while (true) {
ufd.revents = 0;
int nr = poll(&ufd, 1, -1);
if (nr <= 0) {
continue;
}
if (ufd.revents & POLLIN) {
handle_device_fd();
}
}
return 0;
}