From f80d50adbddf55a043dfcab5b47d7c1e22749b7d Mon Sep 17 00:00:00 2001 From: Chris Date: Wed, 16 Aug 2017 17:23:38 -0500 Subject: PLT-7407: Back-end plugin mechanism (#7177) * begin backend plugin wip * flesh out rpcplugin. everything done except for minor supervisor stubs * done with basic plugin infrastructure * simplify tests * remove unused test lines --- plugin/rpcplugin/ipc.go | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 plugin/rpcplugin/ipc.go (limited to 'plugin/rpcplugin/ipc.go') diff --git a/plugin/rpcplugin/ipc.go b/plugin/rpcplugin/ipc.go new file mode 100644 index 000000000..3e6c89c4f --- /dev/null +++ b/plugin/rpcplugin/ipc.go @@ -0,0 +1,28 @@ +package rpcplugin + +import ( + "io" + "os" +) + +// Returns a new IPC for the parent process and a set of files to pass on to the child. +// +// The returned files must be closed after the child process is started. +func NewIPC() (io.ReadWriteCloser, []*os.File, error) { + parentReader, childWriter, err := os.Pipe() + if err != nil { + return nil, nil, err + } + childReader, parentWriter, err := os.Pipe() + if err != nil { + parentReader.Close() + childWriter.Close() + return nil, nil, err + } + return NewReadWriteCloser(parentReader, parentWriter), []*os.File{childReader, childWriter}, nil +} + +// Returns the IPC instance inherited by the process from its parent. +func InheritedIPC(fd0, fd1 uintptr) (io.ReadWriteCloser, error) { + return NewReadWriteCloser(os.NewFile(fd0, ""), os.NewFile(fd1, "")), nil +} -- cgit v1.2.3-1-g7c22