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https://github.com/Telecominfraproject/wlan-cloud-lib-poco.git
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282 lines
8.9 KiB
C++
282 lines
8.9 KiB
C++
//
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// Process.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/Process.h#4 $
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//
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// Library: Foundation
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// Package: Processes
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// Module: Process
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//
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// Definition of the Process class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_Process_INCLUDED
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#define Foundation_Process_INCLUDED
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#include "Poco/Foundation.h"
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#if defined(POCO_OS_FAMILY_WINDOWS) && defined(POCO_WIN32_UTF8)
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#if defined(_WIN32_WCE)
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#include "Process_WINCE.h"
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#else
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#include "Poco/Process_WIN32U.h"
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#endif
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#elif defined(POCO_OS_FAMILY_WINDOWS)
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#include "Poco/Process_WIN32.h"
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#elif defined(POCO_VXWORKS)
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#include "Poco/Process_VX.h"
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#elif defined(POCO_OS_FAMILY_UNIX)
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#include "Poco/Process_UNIX.h"
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#else
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#include "Poco/Process_VMS.h"
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#endif
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namespace Poco {
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class Pipe;
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class Foundation_API ProcessHandle
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/// A handle for a process created with Process::launch().
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///
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/// This handle can be used to determine the process ID of
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/// the newly created process and it can be used to wait for
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/// the completion of a process.
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{
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public:
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typedef ProcessImpl::PIDImpl PID;
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ProcessHandle(const ProcessHandle& handle);
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/// Creates a ProcessHandle by copying another one.
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~ProcessHandle();
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/// Destroys the ProcessHandle.
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ProcessHandle& operator = (const ProcessHandle& handle);
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/// Assigns another handle.
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PID id() const;
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/// Returns the process ID.
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int wait() const;
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/// Waits for the process to terminate
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/// and returns the exit code of the process.
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protected:
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ProcessHandle(ProcessHandleImpl* pImpl);
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private:
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ProcessHandle();
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ProcessHandleImpl* _pImpl;
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friend class Process;
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};
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class Foundation_API Process: public ProcessImpl
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/// This class provides methods for working with processes.
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{
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public:
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typedef PIDImpl PID;
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typedef ArgsImpl Args;
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typedef EnvImpl Env;
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static PID id();
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/// Returns the process ID of the current process.
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static void times(long& userTime, long& kernelTime);
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/// Returns the number of seconds spent by the
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/// current process in user and kernel mode.
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static ProcessHandle launch(const std::string& command, const Args& args);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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static ProcessHandle launch(
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const std::string& command,
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const Args& args,
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const std::string& initialDirectory);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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/// The process starts executing in the specified initial directory.
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static ProcessHandle launch(
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const std::string& command,
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const Args& args,
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Pipe* inPipe,
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Pipe* outPipe,
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Pipe* errPipe);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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///
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/// If inPipe, outPipe or errPipe is non-null, the corresponding
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/// standard input, standard output or standard error stream
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/// of the launched process is redirected to the Pipe.
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/// PipeInputStream or PipeOutputStream can be used to
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/// send receive data from, or send data to the process.
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///
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/// Note: the same Pipe can be used for both outPipe and errPipe.
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///
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/// After a Pipe has been passed as inPipe, only write operations
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/// are valid. After a Pipe has been passed as outPipe or errPipe,
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/// only read operations are valid.
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///
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/// It is forbidden to pass the same pipe as inPipe and outPipe or errPipe.
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///
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/// Usage example:
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/// Pipe outPipe;
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/// Process::Args args;
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/// ProcessHandle ph(launch("/bin/ps", args, 0, &outPipe, 0));
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/// PipeInputStream istr(outPipe);
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/// ... // read output of ps from istr
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/// int rc = ph.wait();
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static ProcessHandle launch(
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const std::string& command,
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const Args& args,
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const std::string& initialDirectory,
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Pipe* inPipe,
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Pipe* outPipe,
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Pipe* errPipe);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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/// The process starts executing in the specified initial directory.
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///
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/// If inPipe, outPipe or errPipe is non-null, the corresponding
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/// standard input, standard output or standard error stream
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/// of the launched process is redirected to the Pipe.
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/// PipeInputStream or PipeOutputStream can be used to
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/// send receive data from, or send data to the process.
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///
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/// Note: the same Pipe can be used for both outPipe and errPipe.
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///
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/// After a Pipe has been passed as inPipe, only write operations
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/// are valid. After a Pipe has been passed as outPipe or errPipe,
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/// only read operations are valid.
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///
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/// It is forbidden to pass the same pipe as inPipe and outPipe or errPipe.
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///
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/// Usage example:
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/// Pipe outPipe;
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/// Process::Args args;
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/// ProcessHandle ph(launch("/bin/ps", args, 0, &outPipe, 0));
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/// PipeInputStream istr(outPipe);
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/// ... // read output of ps from istr
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/// int rc = ph.wait();
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static ProcessHandle launch(
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const std::string& command,
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const Args& args,
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Pipe* inPipe,
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Pipe* outPipe,
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Pipe* errPipe,
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const Env& env);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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///
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/// If inPipe, outPipe or errPipe is non-null, the corresponding
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/// standard input, standard output or standard error stream
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/// of the launched process is redirected to the Pipe.
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///
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/// The launched process is given the specified environment variables.
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static ProcessHandle launch(
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const std::string& command,
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const Args& args,
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const std::string& initialDirectory,
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Pipe* inPipe,
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Pipe* outPipe,
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Pipe* errPipe,
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const Env& env);
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/// Creates a new process for the given command and returns
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/// a ProcessHandle of the new process. The given arguments are
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/// passed to the command on the command line.
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/// The process starts executing in the specified initial directory.
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/// If inPipe, outPipe or errPipe is non-null, the corresponding
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/// standard input, standard output or standard error stream
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/// of the launched process is redirected to the Pipe.
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/// The launched process is given the specified environment variables.
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static int wait(const ProcessHandle& handle);
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/// Waits for the process specified by handle to terminate
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/// and returns the exit code of the process.
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static void kill(const ProcessHandle& handle);
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/// Kills the process specified by handle.
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///
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/// This is preferable on Windows where process IDs
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/// may be reused.
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static void kill(PID pid);
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/// Kills the process with the given pid.
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static void requestTermination(PID pid);
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/// Requests termination of the process with the give PID.
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///
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/// On Unix platforms, this will send a SIGINT to the
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/// process and thus work with arbitrary processes.
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///
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/// On other platforms, a global event flag
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/// will be set. Setting the flag will cause
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/// Util::ServerApplication::waitForTerminationRequest() to
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/// return. Therefore this will only work with applications
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/// based on Util::ServerApplication.
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};
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//
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// inlines
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//
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inline Process::PID Process::id()
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{
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return ProcessImpl::idImpl();
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}
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inline void Process::times(long& userTime, long& kernelTime)
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{
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ProcessImpl::timesImpl(userTime, kernelTime);
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}
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} // namespace Poco
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#endif // Foundation_Process_INCLUDED
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