diff options
Diffstat (limited to 'pkg/sentry/socket/rpcinet/conn/conn.go')
| -rw-r--r-- | pkg/sentry/socket/rpcinet/conn/conn.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/pkg/sentry/socket/rpcinet/conn/conn.go b/pkg/sentry/socket/rpcinet/conn/conn.go index ea6ec87ed..f4c8489b1 100644 --- a/pkg/sentry/socket/rpcinet/conn/conn.go +++ b/pkg/sentry/socket/rpcinet/conn/conn.go @@ -147,6 +147,26 @@ func (c *RPCConnection) RPCReadFile(path string) ([]byte, *syserr.Error) { return res.(*pb.ReadFileResponse_Data).Data, nil } +// RPCWriteFile will execute the WriteFile helper RPC method which avoids the +// common pattern of open(2), write(2), write(2), close(2) by doing all +// operations as a single RPC. +func (c *RPCConnection) RPCWriteFile(path string, data []byte) (int64, *syserr.Error) { + req := &pb.SyscallRequest_WriteFile{&pb.WriteFileRequest{ + Path: path, + Content: data, + }} + + id, ch := c.NewRequest(pb.SyscallRequest{Args: req}, false /* ignoreResult */) + <-ch + + res := c.Request(id).Result.(*pb.SyscallResponse_WriteFile).WriteFile + if e := res.ErrorNumber; e != 0 { + return int64(res.Written), syserr.FromHost(syscall.Errno(e)) + } + + return int64(res.Written), nil +} + // Request retrieves the request corresponding to the given request ID. // // The channel returned by NewRequest must have been closed before Request can |