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<?php
namespace Amp\Process\Internal;
use Amp\Process\ProcessException;
use Amp\Promise;
interface ProcessRunner
{
/**
* Start a process using the supplied parameters.
*
* @param string $command The command to execute.
* @param string|null $cwd The working directory for the child process.
* @param array $env Environment variables to pass to the child process.
* @param array $options `proc_open()` options.
*
* @return ProcessHandle
*
* @throws ProcessException If starting the process fails.
*/
public function start(string $command, string $cwd = null, array $env = [], array $options = []): ProcessHandle;
/**
* Wait for the child process to end.
*
* @param ProcessHandle $handle The process descriptor.
*
* @return Promise <int> Succeeds with exit code of the process or fails if the process is killed.
*/
public function join(ProcessHandle $handle): Promise;
/**
* Forcibly end the child process.
*
* @param ProcessHandle $handle The process descriptor.
*
* @throws ProcessException If terminating the process fails.
*/
public function kill(ProcessHandle $handle);
/**
* Send a signal signal to the child process.
*
* @param ProcessHandle $handle The process descriptor.
* @param int $signo Signal number to send to process.
*
* @throws ProcessException If sending the signal fails.
*/
public function signal(ProcessHandle $handle, int $signo);
/**
* Release all resources held by the process handle.
*
* @param ProcessHandle $handle The process descriptor.
*/
public function destroy(ProcessHandle $handle);
}
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