ftpd(1M)

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO | RESTRICTIONS FOR ChorusOS

NAME

ftpd- Internet File Transfer Protocol server

SYNOPSIS

/etc/ftpd_s [-dl] [-Tmaxtimeout] [-ttimeout]

DESCRIPTION

ftpd is a target utility.

The ftpd daemon is the Internet File Transfer Protocol server process. The server uses the TCP protocol and listens at the port specified in the ftp service specification (see services(5)).

Available options are:

-d

Debugging information is written to the syslog using LOG_FTP.

-l

Each successful and failed ftp(1) session is logged using syslog with a facility of LOG_FTP. If this option is specified twice, the retrieve (get), store (put), append, delete, make directory, remove directory and rename operations and their filename arguments are also logged.

-T

A client may also request a different timeout period; the maximum period allowed may be set to maxtimeout seconds using the -T option. The default limit is 2 hours.

-t

The inactivity timeout period is set to timeout seconds (the default is 15 minutes).

The file /etc/nologin can be used to disable ftp access. If the file exists, ftpd displays it and exits. If the file /etc/ftpwelcome exists, ftpd prints it before issuing the ready message.

The ftp server currently supports the following ftp requests, the case of the requests is ignored:

ABOR

abort previous command

ACCT

specify account (ignored)

ALLO

allocate storage (vacuously)

APPE

append to a file

CDUP

change to parent of current working directory

CWD

change working directory

DELE

delete a file

HELP

give help information

LIST

give list files in a directory (ls -lgA)

MKD

make a directory

MDTM

show last modification time of file

MODE

specify data transfer mode

NLST

give name list of files in directory

NOOP

do nothing

PASS

specify password

PASV

prepare for server-to-server transfer

PORT

specify data connection port

PWD

print the current working directory

QUIT

terminate session

REST

restart incomplete transfer

RETR

retrieve a file

RMD

remove a directory

RNFR

specify rename-from file name

RNTO

specify rename-to file name

SITE

non-standard commands (see next section)

SIZE

return size of file

STAT

return status of server

STOR

store a file

STOU

store a file with a unique name

STRU

specify data transfer structure

SYST

show operating system type of server system

TYPE

specify data transfer type

USER

specify user name

XCUP

change to parent of current working directory (deprecated)

XCWD

change working directory (deprecated)

XMKD

make a directory (deprecated)

XPWD

print the current working directory (deprecated)

XRMD

remove a directory (deprecated)

The remaining ftp requests specified in Internet RFC 959 are recognized, but not implemented.

The ftp server will abort an active file transfer only when the ABOR command is preceded by a Telnet "Interrupt Process" (IP) signal and a Telnet "Synch" signal in the command Telnet stream, as described in Internet RFC 959. If a STAT command is received during a data transfer, preceded by a Telnet IP and Synch, the transfer status will be returned.

The Ftpd daemon interprets file names according to the globbing conventions used by csh. This allows users to use the metacharacters & * ? [ ] { } ~ .

The Ftpd daemon authenticates users according to two rules:

Secure mode

The login name must be in the security data base, /etc/security , and not have a null password (see security(4CC)). In this case a password must be provided by the client before any file operations may be performed.

Non secure mode

In this case the /etc/security file is not present, no password check is performed and the user has the default credential values (see C_INIT(1M)).

In secure mode, if the user name is anonymous or ftp, an anonymous ftp account must be present in the security file (user ftp). In this case the user is allowed to log in with no password check, and ftpd takes special measures to restrict the client's access privileges.

FILES

/etc/ftpwelcome

Welcome notice.

/etc/nologin

Displayed and access refused.

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Evolving

SEE ALSO

ftp(1CC), C_INIT(1M), security(4CC)

RESTRICTIONS FOR ChorusOS

The Ftpd daemon must be started once using the following command:

% rsh -n <target> arun /etc/ftpd_s <options> &

Each ftp connection will then spawn a new ftpd_s actor.

The user's home directory is always the / directory.

If the -d or -l options are used, I/Os will go to the window where the ftpd server was started.

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO | RESTRICTIONS FOR ChorusOS