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authorRajith Muditha Attapattu <rajith@apache.org>2007-11-20 13:59:54 +0000
committerRajith Muditha Attapattu <rajith@apache.org>2007-11-20 13:59:54 +0000
commitbcd011a10c0db4ffc6f78380c548d673e270e000 (patch)
treeae6961f122221a7ce574e10895be8abcca044f12 /Final/cpp/lib/broker/Daemon.cpp
parent5b7a0ca8896f20c85f176cd178735554833bcefc (diff)
downloadqpid-python-bcd011a10c0db4ffc6f78380c548d673e270e000.tar.gz
backing up the previous tag
git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/tags/M2@596673 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'Final/cpp/lib/broker/Daemon.cpp')
-rw-r--r--Final/cpp/lib/broker/Daemon.cpp182
1 files changed, 0 insertions, 182 deletions
diff --git a/Final/cpp/lib/broker/Daemon.cpp b/Final/cpp/lib/broker/Daemon.cpp
deleted file mode 100644
index 3a0e687bf2..0000000000
--- a/Final/cpp/lib/broker/Daemon.cpp
+++ /dev/null
@@ -1,182 +0,0 @@
-/*
- *
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you 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 "Daemon.h"
-#include "Exception.h"
-
-#include <boost/iostreams/stream.hpp>
-#include <boost/iostreams/device/file_descriptor.hpp>
-
-#include <sstream>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-namespace qpid {
-namespace broker {
-
-using namespace std;
-typedef boost::iostreams::stream<boost::iostreams::file_descriptor> fdstream;
-
-namespace {
-/** Throw an exception containing msg and strerror if throwIf is true.
- * Name is supposed to be reminiscent of perror().
- */
-void terror(bool throwIf, const string& msg, int errNo=errno) {
- if (throwIf)
- throw Exception(msg + (errNo? ": "+strError(errNo) : string(".")));
-}
-
-
-struct LockFile : public fdstream {
-
- LockFile(const std::string& path_, bool create)
- : path(path_), fd(-1), created(create)
- {
- errno = 0;
- int flags=create ? O_WRONLY|O_CREAT|O_NOFOLLOW : O_RDWR;
- fd = ::open(path.c_str(), flags, 0644);
- terror(fd < 0,"Cannot open "+path);
- terror(::lockf(fd, F_TLOCK, 0) < 0, "Cannot lock "+path);
- open(boost::iostreams::file_descriptor(fd));
- }
-
- ~LockFile() {
- if (fd >= 0) {
- ::lockf(fd, F_ULOCK, 0);
- close();
- }
- }
-
- std::string path;
- int fd;
- bool created;
-};
-
-} // namespace
-
-Daemon::Daemon() {
- pid = -1;
- pipeFds[0] = pipeFds[1] = -1;
-}
-
-string Daemon::dir() {
- return (getuid() == 0 ? "/var/run" : "/tmp");
-}
-
-string Daemon::pidFile(uint16_t port) {
- ostringstream path;
- path << dir() << "/qpidd." << port << ".pid";
- return path.str();
-}
-
-void Daemon::fork()
-{
- terror(pipe(pipeFds) < 0, "Can't create pipe");
- terror((pid = ::fork()) < 0, "Daemon fork failed");
- if (pid == 0) { // Child
- try {
- // File descriptors
- terror(::close(pipeFds[0])<0, "Cannot close read pipe");
- terror(::close(0)<0, "Cannot close stdin");
- terror(::close(1)<0, "Cannot close stdout");
- terror(::close(2)<0, "Cannot close stderr");
- int fd=::open("/dev/null",O_RDWR); // stdin
- terror(fd != 0, "Cannot re-open stdin");
- terror(::dup(fd)<0, "Cannot re-open stdout");
- terror(::dup(fd)<0, "Cannot re-open stderror");
-
- // Misc
- terror(setsid()<0, "Cannot set session ID");
- terror(chdir(dir().c_str()) < 0, "Cannot change directory to "+dir());
- umask(027);
-
- // Child behavior
- child();
- }
- catch (const exception& e) {
- fdstream pipe(pipeFds[1]);
- assert(pipe.is_open());
- pipe << "0 " << e.what() << endl;
- }
- }
- else { // Parent
- close(pipeFds[1]); // Write side.
- parent();
- }
-}
-
-Daemon::~Daemon() {
- if (!lockFile.empty())
- unlink(lockFile.c_str());
-}
-
-uint16_t Daemon::wait(int timeout) { // parent waits for child.
- errno = 0;
- struct timeval tv;
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- fd_set fds;
- FD_ZERO(&fds);
- FD_SET(pipeFds[0], &fds);
- terror(1 != select(FD_SETSIZE, &fds, 0, 0, &tv), "No response from daemon process");
-
- fdstream pipe(pipeFds[0]);
- uint16_t value = 0;
- pipe >> value >> skipws;
- if (value == 0) {
- string errmsg;
- getline(pipe, errmsg);
- throw Exception("Daemon startup failed"+ (errmsg.empty() ? string(".") : ": " + errmsg));
- }
- return value;
-}
-
-void Daemon::ready(uint16_t port) { // child
- lockFile = pidFile(port);
- LockFile lf(lockFile, true);
- lf << getpid() << endl;
- if (lf.fail())
- throw Exception("Cannot write lock file "+lockFile);
- fdstream pipe(pipeFds[1]);
- pipe << port << endl;;
-}
-
-pid_t Daemon::getPid(uint16_t port) {
- string name = pidFile(port);
- LockFile lockFile(name, false);
- pid_t pid;
- lockFile >> pid;
- if (lockFile.fail())
- throw Exception("Cannot read lock file "+name);
- if (kill(pid, 0) < 0 && errno != EPERM) {
- unlink(name.c_str());
- throw Exception("Removing stale lock file "+name);
- }
- return pid;
-}
-
-
-}} // namespace qpid::broker