81f5d3ebef
With some small fixups along the way Test: Boot bullhead Test: init unit tests Change-Id: I7beaa473cfa9397f845f810557d1631b4a462d6a
134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "descriptors.h"
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#include <ctype.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include <android-base/unique_fd.h>
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#include <cutils/android_get_control_file.h>
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#include <cutils/sockets.h>
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#include "init.h"
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#include "util.h"
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namespace android {
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namespace init {
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DescriptorInfo::DescriptorInfo(const std::string& name, const std::string& type, uid_t uid,
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gid_t gid, int perm, const std::string& context)
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: name_(name), type_(type), uid_(uid), gid_(gid), perm_(perm), context_(context) {
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}
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DescriptorInfo::~DescriptorInfo() {
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}
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std::ostream& operator<<(std::ostream& os, const DescriptorInfo& info) {
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return os << " descriptors " << info.name_ << " " << info.type_ << " " << std::oct << info.perm_;
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}
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bool DescriptorInfo::operator==(const DescriptorInfo& other) const {
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return name_ == other.name_ && type_ == other.type_ && key() == other.key();
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}
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void DescriptorInfo::CreateAndPublish(const std::string& globalContext) const {
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// Create
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const std::string& contextStr = context_.empty() ? globalContext : context_;
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int fd = Create(contextStr);
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if (fd < 0) return;
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// Publish
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std::string publishedName = key() + name_;
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std::for_each(publishedName.begin(), publishedName.end(),
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[] (char& c) { c = isalnum(c) ? c : '_'; });
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std::string val = std::to_string(fd);
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add_environment(publishedName.c_str(), val.c_str());
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// make sure we don't close on exec
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fcntl(fd, F_SETFD, 0);
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}
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void DescriptorInfo::Clean() const {
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}
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SocketInfo::SocketInfo(const std::string& name, const std::string& type, uid_t uid,
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gid_t gid, int perm, const std::string& context)
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: DescriptorInfo(name, type, uid, gid, perm, context) {
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}
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void SocketInfo::Clean() const {
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std::string path = android::base::StringPrintf("%s/%s", ANDROID_SOCKET_DIR, name().c_str());
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unlink(path.c_str());
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}
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int SocketInfo::Create(const std::string& context) const {
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auto types = android::base::Split(type(), "+");
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int flags =
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((types[0] == "stream" ? SOCK_STREAM : (types[0] == "dgram" ? SOCK_DGRAM : SOCK_SEQPACKET)));
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bool passcred = types.size() > 1 && types[1] == "passcred";
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return CreateSocket(name().c_str(), flags, passcred, perm(), uid(), gid(), context.c_str(),
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sehandle);
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}
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const std::string SocketInfo::key() const {
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return ANDROID_SOCKET_ENV_PREFIX;
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}
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FileInfo::FileInfo(const std::string& name, const std::string& type, uid_t uid,
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gid_t gid, int perm, const std::string& context)
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// defaults OK for uid,..., they are ignored for this class.
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: DescriptorInfo(name, type, uid, gid, perm, context) {
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}
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int FileInfo::Create(const std::string&) const {
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int flags = (type() == "r") ? O_RDONLY :
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(type() == "w") ? O_WRONLY :
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O_RDWR;
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// Make sure we do not block on open (eg: devices can chose to block on
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// carrier detect). Our intention is never to delay launch of a service
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// for such a condition. The service can perform its own blocking on
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// carrier detect.
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android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(name().c_str(),
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flags | O_NONBLOCK)));
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if (fd < 0) {
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PLOG(ERROR) << "Failed to open file '" << name().c_str() << "'";
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return -1;
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}
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// Fixup as we set O_NONBLOCK for open, the intent for fd is to block reads.
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fcntl(fd, F_SETFL, flags);
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LOG(INFO) << "Opened file '" << name().c_str() << "'"
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<< ", flags " << std::oct << flags << std::dec;
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return fd.release();
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}
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const std::string FileInfo::key() const {
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return ANDROID_FILE_ENV_PREFIX;
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}
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} // namespace init
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} // namespace android
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