FTPDS - File Transfer Protocol Secure server (ftpds.rta)

Ftpds is the Internet File Transfer Protocol Secure server process. The server uses the TCP protocol and listens at the port specified in the "ftp" service specification. (INtime Distributed RTOS only).

Command line

ftpds [-d] [-i] [-v] [-l] [-p] [-s] [-t] [-A] [-a]

Available options

-d

Debug

-i

Implicit SSL

-v

Verbose

-l

Logging

-p | pri

Base priority (5 .. 253)

-s | n

Allow (1 .. "MAX_SESSIONS") simultaneous sessions

-t | tmo

Connection timeout seconds

-A

Allow only anonymous ftp access

-a

Disallow anonymous ftp access

Implicit SSL configures the FTP server to listen on port 990 for client connections.

The default mode of the FTP server is explicit SSL. The server's SSL capability is advised by the FEAT command response.

The file /config/etc/nologin can be used to disable ftp access. If the file exists, ftpd displays it and exits. If the file /config/etc/ftphello exists, ftpd prints it before issuing the "ready" message. If the file /config/etc/ftpmotd exists, ftpd prints it after a successful login.

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

Request	Description
`ABOR`	abort previous command
`ACCT`	specify account (ignored)
`CCC`	clear command channel
`CDUP`	change to parent of current working directory
`CWD`	change working directory
`DELE`	delete a file
`FEAT`	determine extended features of the server
`HELP`	give help information
`LIST`	give list files in a directory ("ls -lgA")
`MKD`	make a directory
`MDTM`	show last modification time of file
`MFCT`	modify the creation time of a file
`MFMT`	modify the last modification time of a 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
`PBSZ`	protection Buffer Size
`PORT`	specify data connection port
`PROT`	data channel protection level
`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 following non-standard or UNIX specific commands are supported by the SITE request.

Request	Description
`HELP`	give help information.

The remaining ftp requests specified in Internet RFC 959 are recognized, but not implemented. MDTM and SIZE are not specified in RFC 959, but will appear in the next updated FTP RFC.

The ftp server cannot actually abort an active file transfer.

FTPD authenticates users according to the following rules.

The login name must be in the password data base.
If the user name is ``anonymous'' or ``ftp'', an anonymous ftp account must be present in the password file (user ``ftp''). In this case the user is allowed to log in by specifying any password (by convention an email address for the user should be used as the password).
The user name does not appear in %intimecfg%etc/ftpusers

The follow wild cards are recognized by the LIST command.
1. \ - literal character quote
2. ? - match anything
3. * - trailing star matches everything
4. [] - character class. [^....] means inverse character class

Files

%intimecfg%/etc/ftphello Welcome notice.
%intimecfg%/etc/ftpmotd Welcome notice after login.
%intimecfg%/etc/ftpusers List of unwelcome/restricted users.
%intimecfg%/etc/nologin Displayed and access refused.