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sftp: Allow password entry

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This was a bit tricky: We start the ssh binary, but we want it to ignore
SIGINT. In contrast, restic itself should process SIGINT and clean up
properly. Before, we used `setsid()` to give the ssh process its own
process group, but that means it cannot prompt the user for a password
because the tty is gone.

So, now we're passing in two functions that ignore SIGINT just before
the ssh process is started and re-install it after start.
This commit is contained in:
Alexander Neumann
2017-09-23 11:21:27 +02:00
parent 45a09c76ff
commit fb9729fdb9
6 changed files with 24 additions and 41 deletions
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4
cmd/restic/global.go
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@@ -470,7 +470,7 @@ func open(s string, opts options.Options) (restic.Backend, error) {
case "local":
be, err = local.Open(cfg.(local.Config))
case "sftp":
be, err = sftp.Open(cfg.(sftp.Config))
be, err = sftp.Open(cfg.(sftp.Config), SuspendSignalHandler, InstallSignalHandler)
case "s3":
be, err = s3.Open(cfg.(s3.Config))
case "gs":
@@ -522,7 +522,7 @@ func create(s string, opts options.Options) (restic.Backend, error) {
case "local":
return local.Create(cfg.(local.Config))
case "sftp":
return sftp.Create(cfg.(sftp.Config))
return sftp.Create(cfg.(sftp.Config), SuspendSignalHandler, InstallSignalHandler)
case "s3":
return s3.Create(cfg.(s3.Config))
case "gs":