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81 lines
3.4 KiB
Go
81 lines
3.4 KiB
Go
package cow
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import (
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"context"
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"io"
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"github.com/Microsoft/hcsshim/internal/schema1"
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)
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// Process is the interface for an OS process running in a container or utility VM.
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type Process interface {
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// Close releases resources associated with the process and closes the
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// writer and readers returned by Stdio. Depending on the implementation,
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// this may also terminate the process.
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Close() error
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// CloseStdin causes the process's stdin handle to receive EOF/EPIPE/whatever
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// is appropriate to indicate that no more data is available.
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CloseStdin(ctx context.Context) error
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// Pid returns the process ID.
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Pid() int
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// Stdio returns the stdio streams for a process. These may be nil if a stream
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// was not requested during CreateProcess.
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Stdio() (_ io.Writer, _ io.Reader, _ io.Reader)
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// ResizeConsole resizes the virtual terminal associated with the process.
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ResizeConsole(ctx context.Context, width, height uint16) error
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// Kill sends a SIGKILL or equivalent signal to the process and returns whether
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// the signal was delivered. It does not wait for the process to terminate.
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Kill(ctx context.Context) (bool, error)
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// Signal sends a signal to the process and returns whether the signal was
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// delivered. The input is OS specific (either
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// guestrequest.SignalProcessOptionsWCOW or
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// guestrequest.SignalProcessOptionsLCOW). It does not wait for the process
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// to terminate.
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Signal(ctx context.Context, options interface{}) (bool, error)
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// Wait waits for the process to complete, or for a connection to the process to be
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// terminated by some error condition (including calling Close).
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Wait() error
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// ExitCode returns the exit code of the process. Returns an error if the process is
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// not running.
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ExitCode() (int, error)
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}
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// ProcessHost is the interface for creating processes.
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type ProcessHost interface {
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// CreateProcess creates a process. The configuration is host specific
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// (either hcsschema.ProcessParameters or lcow.ProcessParameters).
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CreateProcess(ctx context.Context, config interface{}) (Process, error)
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// OS returns the host's operating system, "linux" or "windows".
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OS() string
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// IsOCI specifies whether this is an OCI-compliant process host. If true,
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// then the configuration passed to CreateProcess should have an OCI process
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// spec (or nil if this is the initial process in an OCI container).
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// Otherwise, it should have the HCS-specific process parameters.
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IsOCI() bool
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}
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// Container is the interface for container objects, either running on the host or
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// in a utility VM.
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type Container interface {
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ProcessHost
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// Close releases the resources associated with the container. Depending on
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// the implementation, this may also terminate the container.
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Close() error
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// ID returns the container ID.
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ID() string
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// Properties returns the requested container properties.
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Properties(ctx context.Context, types ...schema1.PropertyType) (*schema1.ContainerProperties, error)
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// Start starts a container.
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Start(ctx context.Context) error
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// Shutdown sends a shutdown request to the container (but does not wait for
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// the shutdown to complete).
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Shutdown(ctx context.Context) error
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// Terminate sends a terminate request to the container (but does not wait
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// for the terminate to complete).
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Terminate(ctx context.Context) error
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// Wait waits for the container to terminate, or for the connection to the
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// container to be terminated by some error condition (including calling
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// Close).
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Wait() error
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}
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