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package container
import (
"fmt"
"strings"
)
// ContainerState is a string representation of the container's current state.
//
// It currently is an alias for string, but may become a distinct type in the future.
type ContainerState = string
const (
StateCreated ContainerState = "created" // StateCreated indicates the container is created, but not (yet) started.
StateRunning ContainerState = "running" // StateRunning indicates that the container is running.
StatePaused ContainerState = "paused" // StatePaused indicates that the container's current state is paused.
StateRestarting ContainerState = "restarting" // StateRestarting indicates that the container is currently restarting.
StateRemoving ContainerState = "removing" // StateRemoving indicates that the container is being removed.
StateExited ContainerState = "exited" // StateExited indicates that the container exited.
StateDead ContainerState = "dead" // StateDead indicates that the container failed to be deleted. Containers in this state are attempted to be cleaned up when the daemon restarts.
)
var validStates = []ContainerState{
StateCreated, StateRunning, StatePaused, StateRestarting, StateRemoving, StateExited, StateDead,
}
// ValidateContainerState checks if the provided string is a valid
// container [ContainerState].
func ValidateContainerState(s ContainerState) error {
switch s {
case StateCreated, StateRunning, StatePaused, StateRestarting, StateRemoving, StateExited, StateDead:
return nil
default:
return errInvalidParameter{error: fmt.Errorf("invalid value for state (%s): must be one of %s", s, strings.Join(validStates, ", "))}
}
}
// StateStatus is used to return container wait results.
// Implements exec.ExitCode interface.
// This type is needed as State include a sync.Mutex field which make
// copying it unsafe.
type StateStatus struct {
exitCode int
err error
}
// ExitCode returns current exitcode for the state.
func (s StateStatus) ExitCode() int {
return s.exitCode
}
// Err returns current error for the state. Returns nil if the container had
// exited on its own.
func (s StateStatus) Err() error {
return s.err
}
// NewStateStatus returns a new StateStatus with the given exit code and error.
func NewStateStatus(exitCode int, err error) StateStatus {
return StateStatus{
exitCode: exitCode,
err: err,
}
}
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