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restic/internal/backend/sftp/foreground_windows.go
Alexander Neumann 05958caf6e sftp: Prompt for password, don't terminate on SIGINT
This is a follow-up on fb9729fdb9, which
runs the `ssh` in its own process group and selects that process group
as the foreground group. After the sftp connection is established,
restic switches back to the previous foreground process group.

This allows `ssh` to prompt for the password, but it won't receive
the interrupt signal (SIGINT, ^C) later on, because it is not in the
foreground process group any more, allowing a clean tear down.
2018-01-17 23:02:47 +01:00

22 lines
526 B
Go

package sftp
import (
"os/exec"
"github.com/restic/restic/internal/errors"
)
// startForeground runs cmd in the foreground, by temporarily switching to the
// new process group created for cmd. The returned function `bg` switches back
// to the previous process group.
func startForeground(cmd *exec.Cmd) (bg func() error, err error) {
// just start the process and hope for the best
err = cmd.Start()
if err != nil {
return nil, errors.Wrap(err, "cmd.Start")
}
bg = func() error { return nil }
return bg, nil
}