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exec.go
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exec.go
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// +build linux
package native
import (
"fmt"
"os"
"os/exec"
"syscall"
"github.com/docker/docker/daemon/execdriver"
"github.com/opencontainers/runc/libcontainer"
_ "github.com/opencontainers/runc/libcontainer/nsenter"
"github.com/opencontainers/runc/libcontainer/utils"
)
// TODO(vishh): Add support for running in privileged mode.
func (d *driver) Exec(c *execdriver.Command, processConfig *execdriver.ProcessConfig, pipes *execdriver.Pipes, startCallback execdriver.StartCallback) (int, error) {
active := d.activeContainers[c.ID]
if active == nil {
return -1, fmt.Errorf("No active container exists with ID %s", c.ID)
}
p := &libcontainer.Process{
Args: append([]string{processConfig.Entrypoint}, processConfig.Arguments...),
Env: c.ProcessConfig.Env,
Cwd: c.WorkingDir,
User: processConfig.User,
}
config := active.Config()
if err := setupPipes(&config, processConfig, p, pipes); err != nil {
return -1, err
}
if err := active.Start(p); err != nil {
return -1, err
}
if startCallback != nil {
pid, err := p.Pid()
if err != nil {
p.Signal(os.Kill)
p.Wait()
return -1, err
}
startCallback(&c.ProcessConfig, pid)
}
ps, err := p.Wait()
if err != nil {
exitErr, ok := err.(*exec.ExitError)
if !ok {
return -1, err
}
ps = exitErr.ProcessState
}
return utils.ExitStatus(ps.Sys().(syscall.WaitStatus)), nil
}