04-21-2009
How can I bypass the Prompt in SFTP
I am on a sun solaris server and trying to create a script that will test if SFTP is up and running on a remote server (which could be unix or windows).
My thought was to simply invoke sftp and if I get the prompt ofr "Password" then that is an indication that the service is running and I am done.
The problem is that the "prompt" for password takes over the and is wainting for a reply.
This script will run as a sceduled task (cron) to validate the service is up and will simply hang.
Is there a way to capture the fact that password is prompted for and then terminate the script.
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LEARN ABOUT DEBIAN
sftp-server
SFTP-SERVER(8) BSD System Manager's Manual SFTP-SERVER(8)
NAME
sftp-server -- SFTP server subsystem
SYNOPSIS
sftp-server [-ehR] [-f log_facility] [-l log_level] [-u umask]
DESCRIPTION
sftp-server is a program that speaks the server side of SFTP protocol to stdout and expects client requests from stdin. sftp-server is not
intended to be called directly, but from sshd(8) using the Subsystem option.
Command-line flags to sftp-server should be specified in the Subsystem declaration. See sshd_config(5) for more information.
Valid options are:
-e Causes sftp-server to print logging information to stderr instead of syslog for debugging.
-f log_facility
Specifies the facility code that is used when logging messages from sftp-server. The possible values are: DAEMON, USER, AUTH,
LOCAL0, LOCAL1, LOCAL2, LOCAL3, LOCAL4, LOCAL5, LOCAL6, LOCAL7. The default is AUTH.
-h Displays sftp-server usage information.
-l log_level
Specifies which messages will be logged by sftp-server. The possible values are: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG, DEBUG1,
DEBUG2, and DEBUG3. INFO and VERBOSE log transactions that sftp-server performs on behalf of the client. DEBUG and DEBUG1 are
equivalent. DEBUG2 and DEBUG3 each specify higher levels of debugging output. The default is ERROR.
-R Places this instance of sftp-server into a read-only mode. Attempts to open files for writing, as well as other operations that
change the state of the filesystem, will be denied.
-u umask
Sets an explicit umask(2) to be applied to newly-created files and directories, instead of the user's default mask.
For logging to work, sftp-server must be able to access /dev/log. Use of sftp-server in a chroot configuration therefore requires that
syslogd(8) establish a logging socket inside the chroot directory.
SEE ALSO
sftp(1), ssh(1), sshd_config(5), sshd(8)
T. Ylonen and S. Lehtinen, SSH File Transfer Protocol, draft-ietf-secsh-filexfer-00.txt, January 2001, work in progress material.
HISTORY
sftp-server first appeared in OpenBSD 2.8.
AUTHORS
Markus Friedl <markus@openbsd.org>
BSD
January 9, 2010 BSD