Interprocess Communication

Detailed Description

Seastar provides a set of APIs for interprocess communicate

Functions
future< std::tuple< file_desc, file_desc > >	seastar::experimental::make_pipe ()
future< process >	seastar::experimental::spawn_process (const std::filesystem::path &pathname, spawn_parameters params)
future< process >	seastar::experimental::spawn_process (const std::filesystem::path &pathname)

Function Documentation

make_pipe()

future<std::tuple<file_desc, file_desc> > seastar::experimental::make_pipe

(

)

Create a pipe using pipe2

Returns

a tuple of file_desc, the first one for reading from the pipe, the second for writing to it.

spawn_process() [1/2]

future<process> seastar::experimental::spawn_process

(

const std::filesystem::path &

pathname

)

Spawn a subprocess

Parameters

pathname

the path to the executable

Returns

a process representing the spawned subprocess

Note

the this overload does not specify a params parameters for spawning the subprocess. Instead, it uses the pathname for the argv[0] in the params.

spawn_process() [2/2]

future<process> seastar::experimental::spawn_process	(	const std::filesystem::path &	pathname,
		spawn_parameters	params
	)

Spawn a subprocess

Parameters

pathname	the path to the executable
params	parameters for spawning the subprocess

Returns

a process representing the spawned subprocess

Note

the subprocess is spawned with posix_spawn() system call, so the pathname should be relative or absolute path of the executable.