Adding upstream version 1:9.2p1.upstream/1%9.2p1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+SFTP-SERVER(8)              System Manager's Manual             SFTP-SERVER(8)
+
+NAME
+     sftp-server M-bM-^@M-^S OpenSSH SFTP server subsystem
+
+SYNOPSIS
+     sftp-server [-ehR] [-d start_directory] [-f log_facility] [-l log_level]
+                 [-P denied_requests] [-p allowed_requests] [-u umask]
+     sftp-server -Q protocol_feature
+
+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:
+
+     -d start_directory
+             Specifies an alternate starting directory for users.  The
+             pathname may contain the following tokens that are expanded at
+             runtime: %% is replaced by a literal '%', %d is replaced by the
+             home directory of the user being authenticated, and %u is
+             replaced by the username of that user.  The default is to use the
+             user's home directory.  This option is useful in conjunction with
+             the sshd_config(5) ChrootDirectory option.
+
+     -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.
+
+     -P denied_requests
+             Specifies a comma-separated list of SFTP protocol requests that
+             are banned by the server.  sftp-server will reply to any denied
+             request with a failure.  The -Q flag can be used to determine the
+             supported request types.  If both denied and allowed lists are
+             specified, then the denied list is applied before the allowed
+             list.
+
+     -p allowed_requests
+             Specifies a comma-separated list of SFTP protocol requests that
+             are permitted by the server.  All request types that are not on
+             the allowed list will be logged and replied to with a failure
+             message.
+
+             Care must be taken when using this feature to ensure that
+             requests made implicitly by SFTP clients are permitted.
+
+     -Q protocol_feature
+             Queries protocol features supported by sftp-server.  At present
+             the only feature that may be queried is M-bM-^@M-^\requestsM-bM-^@M-^], which may be
+             used to deny or allow specific requests (flags -P and -p
+             respectively).
+
+     -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.
+
+     On some systems, sftp-server must be able to access /dev/log for logging
+     to work, and 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-02.txt, October 2001, work in progress material.
+
+HISTORY
+     sftp-server first appeared in OpenBSD 2.8.
+
+AUTHORS
+     Markus Friedl <markus@openbsd.org>
+
+OpenBSD 7.2                      July 27, 2021                     OpenBSD 7.2