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FTP(1)                    BSD General Commands Manual                   FTP(1)

NAME
     ftp -- Internet file transfer program

SYNOPSIS
     ftp [-46AadefginpRtvV] [-N netrc] [-o output] [-P port] [-q quittime] [-s srcaddr] [-r retry]
         [-T dir,max[,inc]] [[user@]host [port]] [[user@]host:[path][/]] [file:///path]
         [ftp://[user[:password]@]host[:port]/path[/][;type=X]] [http://[user[:password]@]host[:port]/path]
         [...]
     ftp -u URL file [...]

DESCRIPTION
     ftp is the user interface to the Internet standard File Transfer Protocol.  The program allows a user
     to transfer files to and from a remote network site.

     The last five arguments will fetch a file using the FTP or HTTP protocols, or by direct copying, into
     the current directory.  This is ideal for scripts.  Refer to AUTO-FETCHING FILES below for more infor-mation. information.
     mation.

     Options may be specified at the command line, or to the command interpreter.

     -4          Forces ftp to only use IPv4 addresses.

     -6          Forces ftp to only use IPv6 addresses.

     -A          Force active mode ftp.  By default, ftp will try to use passive mode ftp and fall back to
                 active mode if passive is not supported by the server.  This option causes ftp to always
                 use an active connection.  It is only useful for connecting to very old servers that do not
                 implement passive mode properly.

     -a          Causes ftp to bypass normal login procedure, and use an anonymous login instead.

     -d          Enables debugging.

     -e          Disables command line editing.  This is useful for Emacs ange-ftp mode.

     -f          Forces a cache reload for transfers that go through the FTP or HTTP proxies.

     -g          Disables file name globbing.

     -i          Turns off interactive prompting during multiple file transfers.

     -n          Restrains ftp from attempting ``auto-login'' upon initial connection for non auto-fetch
                 transfers.  If auto-login is enabled, ftp will check the .netrc (see below) file in the
                 user's home directory for an entry describing an account on the remote machine.  If no
                 entry exists, ftp will prompt for the remote machine login name (default is the user iden-tity identity
                 tity on the local machine), and, if necessary, prompt for a password and an account with
                 which to login.  To override the auto-login for auto-fetch transfers, specify the username
                 (and optionally, password) as appropriate.

     -N netrc    Use netrc instead of ~/.netrc.  Refer to THE .netrc FILE for more information.

     -o output   When auto-fetching files, save the contents in output.  output is parsed according to the
                 FILE NAMING CONVENTIONS below.  If output is not `-' or doesn't start with `|', then only
                 the first file specified will be retrieved into output; all other files will be retrieved
                 into the basename of their remote name.

     -p          Enable passive mode operation for use behind connection filtering firewalls.  This option
                 has been deprecated as ftp now tries to use passive mode by default, falling back to active
                 mode if the server does not support passive connections.

     -P port     Sets the port number to port.

     -q quittime
                 Quit if the connection has stalled for quittime seconds.

     -r wait     Retry the connection attempt if it failed, pausing for wait seconds.

     -R          Restart all non-proxied auto-fetches.

     -s srcaddr  Uses srcaddr as the local IP address for all connections.

     -t          Enables packet tracing.

     -T direction,maximum[,increment]
                 Set the maximum transfer rate for direction to maximum bytes/second, and if specified, the
                 increment to increment bytes/second.  Refer to rate for more information.

     -u URL file [...]
                 Upload files on the command line to URL where URL is one of the ftp URL types as supported
                 by auto-fetch (with an optional target filename for single file uploads), and file is one
                 or more local files to be uploaded.

     -v          Enable verbose and progress.  This is the default if output is to a terminal (and in the
                 case of progress, ftp is the foreground process).  Forces ftp to show all responses from
                 the remote server, as well as report on data transfer statistics.

     -V          Disable verbose and progress, overriding the default of enabled when output is to a termi-nal. terminal.
                 nal.

     The client host with which ftp is to communicate may be specified on the command line.  If this is
     done, ftp will immediately attempt to establish a connection to an FTP server on that host; otherwise,
     ftp will enter its command interpreter and await instructions from the user.  When ftp is awaiting com-mands commands
     mands from the user the prompt `ftp>' is provided to the user.  The following commands are recognized
     by ftp:

     ! [command [args]]
                 Invoke an interactive shell on the local machine.  If there are arguments, the first is
                 taken to be a command to execute directly, with the rest of the arguments as its arguments.

     $ macro-name [args]
                 Execute the macro macro-name that was defined with the macdef command.  Arguments are
                 passed to the macro unglobbed.

     account [passwd]
                 Supply a supplemental password required by a remote system for access to resources once a
                 login has been successfully completed.  If no argument is included, the user will be
                 prompted for an account password in a non-echoing input mode.

     append local-file [remote-file]
                 Append a local file to a file on the remote machine.  If remote-file is left unspecified,
                 the local file name is used in naming the remote file after being altered by any ntrans or
                 nmap setting.  File transfer uses the current settings for type, format, mode, and
                 structure.

     ascii       Set the file transfer type to network ASCII.  This is the default type.

     bell        Arrange that a bell be sounded after each file transfer command is completed.

     binary      Set the file transfer type to support binary image transfer.

     bye         Terminate the FTP session with the remote server and exit ftp.  An end of file will also
                 terminate the session and exit.

     case        Toggle remote computer file name case mapping during get, mget and mput commands.  When
                 case is on (default is off), remote computer file names with all letters in upper case are
                 written in the local directory with the letters mapped to lower case.

     cd remote-directory
                 Change the working directory on the remote machine to remote-directory.

     cdup        Change the remote machine working directory to the parent of the current remote machine
                 working directory.

     chmod mode remote-file
                 Change the permission modes of the file remote-file on the remote system to mode.

     close       Terminate the FTP session with the remote server, and return to the command interpreter.
                 Any defined macros are erased.

     cr          Toggle carriage return stripping during ascii type file retrieval.  Records are denoted by
                 a carriage return/linefeed sequence during ascii type file transfer.  When cr is on (the
                 default), carriage returns are stripped from this sequence to conform with the UNIX single
                 linefeed record delimiter.  Records on non-UNIX remote systems may contain single line-feeds; linefeeds;
                 feeds; when an ascii type transfer is made, these linefeeds may be distinguished from a
                 record delimiter only when cr is off.

     ftp_debug [ftp_debug-value]
                 Toggle debugging mode.  If an optional ftp_debug-value is specified it is used to set the
                 debugging level.  When debugging is on, ftp prints each command sent to the remote machine,
                 preceded by the string `-->'

     delete remote-file
                 Delete the file remote-file on the remote machine.

     dir [remote-path [local-file]]
                 Print a listing of the contents of a directory on the remote machine.  The listing includes
                 any system-dependent information that the server chooses to include; for example, most UNIX
                 systems will produce output from the command `ls -l'.  If remote-path is left unspecified,
                 the current working directory is used.  If interactive prompting is on, ftp will prompt the
                 user to verify that the last argument is indeed the target local file for receiving dir
                 output.  If no local file is specified, or if local-file is `-', the output is sent to the
                 terminal.

     disconnect  A synonym for close.

     edit        Toggle command line editing, and context sensitive command and file completion.  This is
                 automatically enabled if input is from a terminal, and disabled otherwise.

     epsv4       Toggle the use of the extended EPSV and EPRT commands on IPv4 connections; first try EPSV /
                 EPRT, and then PASV / PORT.  This is enabled by default.  If an extended command fails then
                 this option will be temporarily disabled for the duration of the current connection, or
                 until epsv4 is executed again.

     exit        A synonym for bye.

     features    Display what features the remote server supports (using the FEAT command).

     fget localfile
                 Retrieve the files listed in localfile, which has one line per filename.

     form format
                 Set the file transfer form to format.  The default (and only supported) format is
                 ``non-print''.

     ftp host [port]
                 A synonym for open.

     gate [host [port]]
                 Toggle gate-ftp mode, which used to connect through the TIS FWTK and Gauntlet ftp proxies.
                 This will not be permitted if the gate-ftp server hasn't been set (either explicitly by the
                 user, or from the FTPSERVER environment variable).  If host is given, then gate-ftp mode
                 will be enabled, and the gate-ftp server will be set to host.  If port is also given, that
                 will be used as the port to connect to on the gate-ftp server.

     get remote-file [local-file]
                 Retrieve the remote-file and store it on the local machine.  If the local file name is not
                 specified, it is given the same name it has on the remote machine, subject to alteration by
                 the current case, ntrans, and nmap settings.  The current settings for type, form, mode,
                 and structure are used while transferring the file.

     glob        Toggle filename expansion for mdelete, mget, mput, and mreget.  If globbing is turned off
                 with glob, the file name arguments are taken literally and not expanded.  Globbing for mput
                 is done as in csh(1).  For mdelete, mget, and mreget, each remote file name is expanded
                 separately on the remote machine and the lists are not merged.  Expansion of a directory
                 name is likely to be different from expansion of the name of an ordinary file: the exact
                 result depends on the foreign operating system and ftp server, and can be previewed by
                 doing `mls remote-files -' Note: mget, mput and mreget are not meant to transfer entire
                 directory subtrees of files.  That can be done by transferring a tar(1) archive of the sub-tree subtree
                 tree (in binary mode).

     hash [size]
                 Toggle hash-sign (`#') printing for each data block transferred.  The size of a data block
                 defaults to 1024 bytes.  This can be changed by specifying size in bytes.  Enabling hash
                 disables progress.

     help [command]
                 Print an informative message about the meaning of command.  If no argument is given, ftp
                 prints a list of the known commands.

     idle [seconds]
                 Set the inactivity timer on the remote server to seconds seconds.  If seconds is omitted,
                 the current inactivity timer is printed.

     image       A synonym for binary.

     lcd [directory]
                 Change the working directory on the local machine.  If no directory is specified, the
                 user's home directory is used.

     less file   A synonym for page.

     lpage local-file
                 Display local-file with the program specified by the set pager option.

     lpwd        Print the working directory on the local machine.

     ls [remote-path [local-file]]
                 A synonym for dir.

     macdef macro-name
                 Define a macro.  Subsequent lines are stored as the macro macro-name; a null line (consecu-tive (consecutive
                 tive newline characters in a file or carriage returns from the terminal) terminates macro
                 input mode.  There is a limit of 16 macros and 4096 total characters in all defined macros.
                 Macro names can be a maximum of 8 characters.  Macros are only applicable to the current
                 session they are defined within (or if defined outside a session, to the session invoked
                 with the next open command), and remain defined until a close command is executed.  To
                 invoke a macro, use the $ command (see above).

                 The macro processor interprets `$' and `\' as special characters.  A `$' followed by a num-ber number
                 ber (or numbers) is replaced by the corresponding argument on the macro invocation command
                 line.  A `$' followed by an `i' signals the macro processor that the executing macro is to
                 be looped.  On the first pass ``$i'' is replaced by the first argument on the macro invoca-tion invocation
                 tion command line, on the second pass it is replaced by the second argument, and so on.  A
                 `\' followed by any character is replaced by that character.  Use the `\' to prevent spe-cial special
                 cial treatment of the `$'.

     mdelete [remote-files]
                 Delete the remote-files on the remote machine.

     mdir remote-files local-file
                 Like dir, except multiple remote files may be specified.  If interactive prompting is on,
                 ftp will prompt the user to verify that the last argument is indeed the target local file
                 for receiving mdir output.

     mget remote-files
                 Expand the remote-files on the remote machine and do a get for each file name thus pro-duced. produced.
                 duced.  See glob for details on the filename expansion.  Resulting file names will then be
                 processed according to case, ntrans, and nmap settings.  Files are transferred into the
                 local working directory, which can be changed with `lcd directory'; new local directories
                 can be created with `! mkdir directory'.

     mkdir directory-name
                 Make a directory on the remote machine.

     mls remote-files local-file
                 Like ls, except multiple remote files may be specified, and the local-file must be speci-fied. specified.
                 fied.  If interactive prompting is on, ftp will prompt the user to verify that the last
                 argument is indeed the target local file for receiving mls output.

     mlsd [remote-path]
                 Display the contents of remote-path (which should default to the current directory if not
                 given) in a machine-parsable form, using MLSD.  The format of display can be changed with
                 `remopts mlst ...'.

     mlst [remote-path]
                 Display the details about remote-path (which should default to the current directory if not
                 given) in a machine-parsable form, using MLST.  The format of display can be changed with
                 `remopts mlst ...'.

     mode mode-name
                 Set the file transfer mode to mode-name.  The default (and only supported) mode is
                 ``stream''.

     modtime remote-file
                 Show the last modification time of the file on the remote machine, in RFC2822 format.

     more file   A synonym for page.

     mput local-files
                 Expand wild cards in the list of local files given as arguments and do a put for each file
                 in the resulting list.  See glob for details of filename expansion.  Resulting file names
                 will then be processed according to ntrans and nmap settings.

     mreget remote-files
                 As per mget, but performs a reget instead of get.

     msend local-files
                 A synonym for mput.

     newer remote-file [local-file]
                 Get the file only if the modification time of the remote file is more recent that the file
                 on the current system.  If the file does not exist on the current system, the remote file
                 is considered newer.  Otherwise, this command is identical to get.

     nlist [remote-path [local-file]]
                 A synonym for ls.

     nmap [inpattern outpattern]
                 Set or unset the filename mapping mechanism.  If no arguments are specified, the filename
                 mapping mechanism is unset.  If arguments are specified, remote filenames are mapped during
                 mput commands and put commands issued without a specified remote target filename.  If argu-ments arguments
                 ments are specified, local filenames are mapped during mget commands and get commands
                 issued without a specified local target filename.  This command is useful when connecting
                 to a non-UNIX remote computer with different file naming conventions or practices.  The
                 mapping follows the pattern set by inpattern and outpattern.  [Inpattern] is a template for
                 incoming filenames (which may have already been processed according to the ntrans and case
                 settings).  Variable templating is accomplished by including the sequences ``$1'', ``$2'',
                 ...  ``$9'' in inpattern.  Use `\' to prevent this special treatment of the `$' character.
                 All other characters are treated literally, and are used to determine the nmap [inpattern]
                 variable values.  For example, given inpattern $1.$2 and the remote file name
                 "mydata.data", $1 would have the value "mydata", and $2 would have the value "data".  The
                 outpattern determines the resulting mapped filename.  The sequences ``$1'', ``$2'', ...
                 ``$9'' are replaced by any value resulting from the inpattern template.  The sequence
                 ``$0'' is replaced by the original filename.  Additionally, the sequence ``[seq1, seq2]''
                 is replaced by [seq1] if seq1 is not a null string; otherwise it is replaced by seq2.  For
                 example, the command

                       nmap $1.$2.$3 [$1,$2].[$2,file]

                 would yield the output filename "myfile.data" for input filenames "myfile.data" and
                 "myfile.data.old", "myfile.file" for the input filename "myfile", and "myfile.myfile" for
                 the input filename ".myfile".  Spaces may be included in outpattern, as in the example:
                       nmap $1 sed s/  *$// > $1
                 Use the `\' character to prevent special treatment of the `$', `[', `]', and `,' charac-ters. characters.
                 ters.

     ntrans [inchars [outchars]]
                 Set or unset the filename character translation mechanism.  If no arguments are specified,
                 the filename character translation mechanism is unset.  If arguments are specified, charac-ters characters
                 ters in remote filenames are translated during mput commands and put commands issued with-out without
                 out a specified remote target filename.  If arguments are specified, characters in local
                 filenames are translated during mget commands and get commands issued without a specified
                 local target filename.  This command is useful when connecting to a non-UNIX remote com-puter computer
                 puter with different file naming conventions or practices.  Characters in a filename match-ing matching
                 ing a character in inchars are replaced with the corresponding character in outchars.  If
                 the character's position in inchars is longer than the length of outchars, the character is
                 deleted from the file name.

     open host [port]
                 Establish a connection to the specified host FTP server.  An optional port number may be
                 supplied, in which case, ftp will attempt to contact an FTP server at that port.  If the
                 set auto-login option is on (default), ftp will also attempt to automatically log the user
                 in to the FTP server (see below).

     page file   Retrieve file and display with the program specified by the set pager option.

     passive [auto]
                 Toggle passive mode (if no arguments are given).  If auto is given, act as if FTPMODE is
                 set to `auto'.  If passive mode is turned on (default), ftp will send a PASV command for
                 all data connections instead of a PORT command.  The PASV command requests that the remote
                 server open a port for the data connection and return the address of that port.  The remote
                 server listens on that port and the client connects to it.  When using the more traditional
                 PORT command, the client listens on a port and sends that address to the remote server, who
                 connects back to it.  Passive mode is useful when using ftp through a gateway router or
                 host that controls the directionality of traffic.  (Note that though FTP servers are
                 required to support the PASV command by RFC1123, some do not.)

     pdir [remote-path]
                 Perform dir [remote-path], and display the result with the program specified by the set
                 pager option.

     pls [remote-path]
                 Perform ls [remote-path], and display the result with the program specified by the set
                 pager option.

     pmlsd [remote-path]
                 Perform mlsd [remote-path], and display the result with the program specified by the set
                 pager option.

     preserve    Toggle preservation of modification times on retrieved files.

     progress    Toggle display of transfer progress bar.  The progress bar will be disabled for a transfer
                 that has local-file as `-' or a command that starts with `|'.  Refer to FILE NAMING
                 CONVENTIONS for more information.  Enabling progress disables hash.

     prompt      Toggle interactive prompting.  Interactive prompting occurs during multiple file transfers
                 to allow the user to selectively retrieve or store files.  If prompting is turned off
                 (default is on), any mget or mput will transfer all files, and any mdelete will delete all
                 files.

                 When prompting is on, the following commands are available at a prompt:

                       a   Answer `yes' to the current file, and automatically answer `yes' to any remaining
                           files for the current command.

                       n   Answer `no', and do not transfer the file.

                       p   Answer `yes' to the current file, and turn off prompt mode (as is ``prompt off''
                           had been given).

                       q   Terminate the current operation.

                       y   Answer `yes', and transfer the file.

                       ?   Display a help message.

                 Any other response will answer `yes' to the current file.

     proxy ftp-command
                 Execute an ftp command on a secondary control connection.  This command allows simultaneous
                 connection to two remote FTP servers for transferring files between the two servers.  The
                 first proxy command should be an open, to establish the secondary control connection.
                 Enter the command "proxy ?" to see other FTP commands executable on the secondary connec-tion. connection.
                 tion.  The following commands behave differently when prefaced by proxy: open will not
                 define new macros during the auto-login process, close will not erase existing macro defi-nitions, definitions,
                 nitions, get and mget transfer files from the host on the primary control connection to the
                 host on the secondary control connection, and put, mput, and append transfer files from the
                 host on the secondary control connection to the host on the primary control connection.
                 Third party file transfers depend upon support of the FTP protocol PASV command by the
                 server on the secondary control connection.

     put local-file [remote-file]
                 Store a local file on the remote machine.  If remote-file is left unspecified, the local
                 file name is used after processing according to any ntrans or nmap settings in naming the
                 remote file.  File transfer uses the current settings for type, format, mode, and
                 structure.

     pwd         Print the name of the current working directory on the remote machine.

     quit        A synonym for bye.

     quote arg1 arg2 ...
                 The arguments specified are sent, verbatim, to the remote FTP server.

     rate direction [maximum [increment]]
                 Throttle the maximum transfer rate to maximum bytes/second.  If maximum is 0, disable the
                 throttle.

                 direction may be one of:
                       all  Both directions.
                       get  Incoming transfers.
                       put  Outgoing transfers.

                 maximum can be modified on the fly by increment bytes (default: 1024) each time a given
                 signal is received:

                       SIGUSR1  Increment maximum by increment bytes.

                       SIGUSR2  Decrement maximum by increment bytes.  The result must be a positive number.

                 If maximum is not supplied, the current throttle rates are displayed.

                 Note: rate is not yet implemented for ascii mode transfers.

     rcvbuf size
                 Set the size of the socket receive buffer to size.

     recv remote-file [local-file]
                 A synonym for get.

     reget remote-file [local-file]
                 reget acts like get, except that if local-file exists and is smaller than remote-file,
                 local-file is presumed to be a partially transferred copy of remote-file and the transfer
                 is continued from the apparent point of failure.  This command is useful when transferring
                 very large files over networks that are prone to dropping connections.

     remopts command [command-options]
                 Set options on the remote FTP server for command to command-options (whose absence is han-dled handled
                 dled on a command-specific basis).  Remote FTP commands known to support options include:
                 `MLST' (used for MLSD and MLST).

     rename [from [to]]
                 Rename the file from on the remote machine, to the file to.

     reset       Clear reply queue.  This command re-synchronizes command/reply sequencing with the remote
                 FTP server.  Resynchronization may be necessary following a violation of the FTP protocol
                 by the remote server.

     restart marker
                 Restart the immediately following get or put at the indicated marker.  On UNIX systems,
                 marker is usually a byte offset into the file.

     rhelp [command-name]
                 Request help from the remote FTP server.  If a command-name is specified it is supplied to
                 the server as well.

     rmdir directory-name
                 Delete a directory on the remote machine.

     rstatus [remote-file]
                 With no arguments, show status of remote machine.  If remote-file is specified, show status
                 of remote-file on remote machine.

     runique     Toggle storing of files on the local system with unique filenames.  If a file already
                 exists with a name equal to the target local filename for a get or mget command, a ".1" is
                 appended to the name.  If the resulting name matches another existing file, a ".2" is
                 appended to the original name.  If this process continues up to ".99", an error message is
                 printed, and the transfer does not take place.  The generated unique filename will be
                 reported.  Note that runique will not affect local files generated from a shell command
                 (see below).  The default value is off.

     send local-file [remote-file]
                 A synonym for put.

     sendport    Toggle the use of PORT commands.  By default, ftp will attempt to use a PORT command when
                 establishing a connection for each data transfer.  The use of PORT commands can prevent
                 delays when performing multiple file transfers.  If the PORT command fails, ftp will use
                 the default data port.  When the use of PORT commands is disabled, no attempt will be made
                 to use PORT commands for each data transfer.  This is useful for certain FTP implementa-tions implementations
                 tions which do ignore PORT commands but, incorrectly, indicate they've been accepted.

     set [option value]
                 Set option to value.  If option and value are not given, display all of the options and
                 their values.  The currently supported options are:

                       anonpass    Defaults to $FTPANONPASS

                       ftp_proxy   Defaults to $ftp_proxy.

                       http_proxy  Defaults to $http_proxy.

                       no_proxy    Defaults to $no_proxy.

                       pager       Defaults to $PAGER.

                       prompt      Defaults to $FTPPROMPT.

                       rprompt     Defaults to $FTPRPROMPT.

     site arg1 arg2 ...
                 The arguments specified are sent, verbatim, to the remote FTP server as a SITE command.

     size remote-file
                 Return size of remote-file on remote machine.

     sndbuf size
                 Set the size of the socket send buffer to size.

     status      Show the current status of ftp.

     struct struct-name
                 Set the file transfer structure to struct-name.  The default (and only supported) structure
                 is ``file''.

     sunique     Toggle storing of files on remote machine under unique file names.  The remote FTP server
                 must support FTP protocol STOU command for successful completion.  The remote server will
                 report unique name.  Default value is off.

     system      Show the type of operating system running on the remote machine.

     tenex       Set the file transfer type to that needed to talk to TENEX machines.

     throttle    A synonym for rate.

     trace       Toggle packet tracing.

     type [type-name]
                 Set the file transfer type to type-name.  If no type is specified, the current type is
                 printed.  The default type is network ASCII.

     umask [newmask]
                 Set the default umask on the remote server to newmask.  If newmask is omitted, the current
                 umask is printed.

     unset option
                 Unset option.  Refer to set for more information.

     usage command
                 Print the usage message for command.

     user user-name [password [account]]
                 Identify yourself to the remote FTP server.  If the password is not specified and the
                 server requires it, ftp will prompt the user for it (after disabling local echo).  If an
                 account field is not specified, and the FTP server requires it, the user will be prompted
                 for it.  If an account field is specified, an account command will be relayed to the remote
                 server after the login sequence is completed if the remote server did not require it for
                 logging in.  Unless ftp is invoked with ``auto-login'' disabled, this process is done auto-matically automatically
                 matically on initial connection to the FTP server.

     verbose     Toggle verbose mode.  In verbose mode, all responses from the FTP server are displayed to
                 the user.  In addition, if verbose is on, when a file transfer completes, statistics
                 regarding the efficiency of the transfer are reported.  By default, verbose is on.

     xferbuf size
                 Set the size of the socket send and receive buffers to size.

     ? [command]
                 A synonym for help.

     Command arguments which have embedded spaces may be quoted with quote `"' marks.

     Commands which toggle settings can take an explicit on or off argument to force the setting appropri-ately. appropriately.
     ately.

     Commands which take a byte count as an argument (e.g., hash, rate, and xferbuf) support an optional
     suffix on the argument which changes the interpretation of the argument.  Supported suffixes are:
           b    Causes no modification.  (Optional)
           k    Kilo; multiply the argument by 1024
           m    Mega; multiply the argument by 1048576
           g    Giga; multiply the argument by 1073741824

     If ftp receives a SIGINFO (see the ``status'' argument of stty(1)) or SIGQUIT signal whilst a transfer
     is in progress, the current transfer rate statistics will be written to the standard error output, in
     the same format as the standard completion message.

AUTO-FETCHING FILES
     In addition to standard commands, this version of ftp supports an auto-fetch feature.  To enable auto-fetch, autofetch,
     fetch, simply pass the list of hostnames/files on the command line.

     The following formats are valid syntax for an auto-fetch element:

     [user@]host:[path][/]
           ``Classic'' FTP format.

           If path contains a glob character and globbing is enabled, (see glob), then the equivalent of
           `mget path' is performed.

           If the directory component of path contains no globbing characters, it is stored locally with the
           name basename (see basename(1)) of path, in the current directory.  Otherwise, the full remote
           name is used as the local name, relative to the local root directory.

     ftp://[user[:password]@]host[:port]/path[/][;type=X]
           An FTP URL, retrieved using the FTP protocol if set ftp_proxy isn't defined.  Otherwise, transfer
           the URL using HTTP via the proxy defined in set ftp_proxy.  If set ftp_proxy isn't defined and
           user is given, login as user.  In this case, use password if supplied, otherwise prompt the user
           for one.

           If a suffix of `;type=A' or `;type=I' is supplied, then the transfer type will take place as
           ascii or binary (respectively).  The default transfer type is binary.

           In order to be compliant with RFC3986, ftp interprets the path part of an ``ftp://'' auto-fetch
           URL as follows:

           •   The `/' immediately after the host[:port] is interpreted as a separator before the path, and
               not as part of the path itself.

           •   The path is interpreted as a `/'-separated list of name components.  For all but the last
               such component, ftp performs the equivalent of a cd command.  For the last path component,
               ftp performs the equivalent of a get command.

           •   Empty name components, which result from `//' within the path, or from an extra `/' at the
               beginning of the path, will cause the equivalent of a cd command without a directory name.
               This is unlikely to be useful.

           •   Any `%XX' codes (per RFC3986) within the path components are decoded, with XX representing a
               character code in hexadecimal.  This decoding takes place after the path has been split into
               components, but before each component is used in the equivalent of a cd or get command.  Some
               often-used codes are `%2F' (which represents `/') and `%7E' (which represents `~').

           The above interpretation has the following consequences:

           •   The path is interpreted relative to the default login directory of the specified user or of
               the `anonymous' user.  If the / directory is required, use a leading path of ``%2F''.  If a
               user's home directory is required (and the remote server supports the syntax), use a leading
               path of ``%7Euser/''.  For example, to retrieve /etc/motd from `localhost' as the user
               `myname' with the password `mypass', use ``ftp://myname:mypass@localhost/%2fetc/motd''

           •   The exact cd and get commands can be controlled by careful choice of where to use `/' and
               where to use `%2F' (or `%2f').  For example, the following URLs correspond to the equivalents
               of the indicated commands:

               ftp://host/dir1/dir2/file         ``cd dir1'', ``cd dir2'', ``get file''.

               ftp://host/%2Fdir1/dir2/file      ``cd /dir1'', ``cd dir2'', ``get file''.

               ftp://host/dir1%2Fdir2/file       ``cd dir1/dir2'', ``get file''.

               ftp://host/%2Fdir1%2Fdir2/file    ``cd /dir1/dir2'', ``get file''.

               ftp://host/dir1%2Fdir2%2Ffile     ``get dir1/dir2/file''.

               ftp://host/%2Fdir1%2Fdir2%2Ffile  ``get /dir1/dir2/file''.

           •   You must have appropriate access permission for each of the intermediate directories that is
               used in the equivalent of a cd command.

     http://[user[:password]@]host[:port]/path
           An HTTP URL, retrieved using the HTTP protocol.  If set http_proxy is defined, it is used as a
           URL to an HTTP proxy server.  If HTTP authorization is required to retrieve path, and `user' (and
           optionally `password') is in the URL, use them for the first attempt to authenticate.

     file:///path
           A local URL, copied from /path on the local host.

     about:topic
           Display information regarding topic; no file is retrieved for this auto-fetched element.  Sup-ported Supported
           ported values include:

           about:ftp      Information about ftp.

           about:version  The version of ftp.  Useful to provide when reporting problems.

     Unless noted otherwise above, and -o output is not given, the file is stored in the current directory
     as the basename(1) of path.  Note that if a HTTP redirect is received, the fetch is retried using the
     new target URL supplied by the server, with a corresponding new path.  Using an explicit -o output is
     recommended, to avoid writing to unexpected file names.

     If a classic format or an FTP URL format has a trailing `/' or an empty path component, then ftp will
     connect to the site and cd to the directory given as the path, and leave the user in interactive mode
     ready for further input.  This will not work if set ftp_proxy is being used.

     Direct HTTP transfers use HTTP 1.1.  Proxied FTP and HTTP transfers use HTTP 1.0.

     If -R is given, all auto-fetches that don't go via the FTP or HTTP proxies will be restarted.  For FTP,
     this is implemented by using reget instead of get.  For HTTP, this is implemented by using the `Range:
     bytes=' HTTP/1.1 directive.

     If WWW or proxy WWW authentication is required, you will be prompted to enter a username and password
     to authenticate with.

     When specifying IPv6 numeric addresses in a URL, you need to surround the address in square brackets.
     E.g.: ``ftp://[::1]:21/''.  This is because colons are used in IPv6 numeric address as well as being
     the separator for the port number.

ABORTING A FILE TRANSFER
     To abort a file transfer, use the terminal interrupt key (usually Ctrl-C).  Sending transfers will be
     immediately halted.  Receiving transfers will be halted by sending an FTP protocol ABOR command to the
     remote server, and discarding any further data received.  The speed at which this is accomplished
     depends upon the remote server's support for ABOR processing.  If the remote server does not support
     the ABOR command, the prompt will not appear until the remote server has completed sending the
     requested file.

     If the terminal interrupt key sequence is used whilst ftp is awaiting a reply from the remote server
     for the ABOR processing, then the connection will be closed.  This is different from the traditional
     behaviour (which ignores the terminal interrupt during this phase), but is considered more useful.

FILE NAMING CONVENTIONS
     Files specified as arguments to ftp commands are processed according to the following rules.

     1.   If the file name `-' is specified, the stdin (for reading) or stdout (for writing) is used.

     2.   If the first character of the file name is `|', the remainder of the argument is interpreted as a
          shell command.  ftp then forks a shell, using popen(3) with the argument supplied, and reads
          (writes) from the stdout (stdin).  If the shell command includes spaces, the argument must be
          quoted; e.g.  ``"| ls -lt"''.  A particularly useful example of this mechanism is: ``dir ""
          |more''.

     3.   Failing the above checks, if ``globbing'' is enabled, local file names are expanded according to
          the rules used in the csh(1); see the glob command.  If the ftp command expects a single local
          file (e.g.  put), only the first filename generated by the "globbing" operation is used.

     4.   For mget commands and get commands with unspecified local file names, the local filename is the
          remote filename, which may be altered by a case, ntrans, or nmap setting.  The resulting filename
          may then be altered if runique is on.

     5.   For mput commands and put commands with unspecified remote file names, the remote filename is the
          local filename, which may be altered by a ntrans or nmap setting.  The resulting filename may then
          be altered by the remote server if sunique is on.

FILE TRANSFER PARAMETERS
     The FTP specification specifies many parameters which may affect a file transfer.  The type may be one
     of ``ascii'', ``image'' (binary), ``ebcdic'', and ``local byte size'' (for PDP-10's and PDP-20's
     mostly).  ftp supports the ascii and image types of file transfer, plus local byte size 8 for tenex
     mode transfers.

     ftp supports only the default values for the remaining file transfer parameters: mode, form, and
     struct.

THE .netrc FILE
     The .netrc file contains login and initialization information used by the auto-login process.  It
     resides in the user's home directory, unless overridden with the -N netrc option, or specified in the
     NETRC environment variable.  The following tokens are recognized; they may be separated by spaces,
     tabs, or new-lines:

     machine name
               Identify a remote machine name.  The auto-login process searches the .netrc file for a
               machine token that matches the remote machine specified on the ftp command line or as an open
               command argument.  Once a match is made, the subsequent .netrc tokens are processed, stopping
               when the end of file is reached or another machine or a default token is encountered.

     default   This is the same as machine name except that default matches any name.  There can be only one
               default token, and it must be after all machine tokens.  This is normally used as:

                     default login anonymous password user@site

               thereby giving the user an automatic anonymous FTP login to machines not specified in .netrc.
               This can be overridden by using the -n flag to disable auto-login.

     login name
               Identify a user on the remote machine.  If this token is present, the auto-login process will
               initiate a login using the specified name.

     password string
               Supply a password.  If this token is present, the auto-login process will supply the speci-fied specified
               fied string if the remote server requires a password as part of the login process.  Note that
               if this token is present in the .netrc file for any user other than anonymous, ftp will abort
               the auto-login process if the .netrc is readable by anyone besides the user.

     account string
               Supply an additional account password.  If this token is present, the auto-login process will
               supply the specified string if the remote server requires an additional account password, or
               the auto-login process will initiate an ACCT command if it does not.

     macdef name
               Define a macro.  This token functions like the ftp macdef command functions.  A macro is
               defined with the specified name; its contents begin with the next .netrc line and continue
               until a blank line (consecutive new-line characters) is encountered.  Like the other tokens
               in the .netrc file, a macdef is applicable only to the machine definition preceding it.  A
               macdef entry cannot be utilized by multiple machine definitions; rather, it must be defined
               following each machine it is intended to be used with.  If a macro named init is defined, it
               is automatically executed as the last step in the auto-login process.  For example,

                     default
                     macdef init
                     epsv4 off

               followed by a blank line.

COMMAND LINE EDITING
     ftp supports interactive command line editing, via the editline(3) library.  It is enabled with the
     edit command, and is enabled by default if input is from a tty.  Previous lines can be recalled and
     edited with the arrow keys, and other GNU Emacs-style editing keys may be used as well.

     The editline(3) library is configured with a .editrc file - refer to editrc(5) for more information.

     An extra key binding is available to ftp to provide context sensitive command and filename completion
     (including remote file completion).  To use this, bind a key to the editline(3) command ftp-complete.
     By default, this is bound to the TAB key.

COMMAND LINE PROMPT
     By default, ftp displays a command line prompt of ``ftp> '' to the user.  This can be changed with the
     set prompt command.

     A prompt can be displayed on the right side of the screen (after the command input) with the set
     rprompt command.

     The following formatting sequences are replaced by the given information:

           %/   The current remote working directory.

           %c[[0]n],%.[[0]n]
                The trailing component of the current remote working directory, or n trailing components if
                a digit n is given.  If n begins with `0', the number of skipped components precede the
                trailing component(s) in the format ``/<number>trailing'' (for `%c') or ``...trailing'' (for
                `%.').

           %M   The remote host name.

           %m   The remote host name, up to the first `.'.

           %n   The remote user name.

           %%   A single `%'.

ENVIRONMENT
     ftp uses the following environment variables.

     FTPANONPASS    Password to send in an anonymous FTP transfer.  Defaults to ```whoami`@''.

     FTPMODE        Overrides the default operation mode.  Support values are:

                    active   active mode FTP only

                    auto     automatic determination of passive or active (this is the default)

                    gate     gate-ftp mode

                    passive  passive mode FTP only

     FTPPROMPT      Command-line prompt to use.  Defaults to ``ftp> ''.  Refer to COMMAND LINE PROMPT for
                    more information.

     FTPRPROMPT     Command-line right side prompt to use.  Defaults to ``''.  Refer to COMMAND LINE PROMPT
                    for more information.

     FTPSERVER      Host to use as gate-ftp server when gate is enabled.

     FTPSERVERPORT  Port to use when connecting to gate-ftp server when gate is enabled.  Default is port
                    returned by a getservbyname() lookup of ``ftpgate/tcp''.

     FTPUSERAGENT   The value to send for the HTTP User-Agent header.

     HOME           For default location of a .netrc file, if one exists.

     NETRC          An alternate location of the .netrc file.

     PAGER          Used by various commands to display files.  Defaults to more(1) if empty or not set.

     SHELL          For default shell.

     ftp_proxy      URL of FTP proxy to use when making FTP URL requests (if not defined, use the standard
                    FTP protocol).

                    See http_proxy for further notes about proxy use.

     http_proxy     URL of HTTP proxy to use when making HTTP URL requests.  If proxy authentication is
                    required and there is a username and password in this URL, they will automatically be
                    used in the first attempt to authenticate to the proxy.

                    If ``unsafe'' URL characters are required in the username or password (for example `@'
                    or `/'), encode them with RFC3986 `%XX' encoding.

                    Note that the use of a username and password in ftp_proxy and http_proxy may be incom-patible incompatible
                    patible with other programs that use it (such as lynx(1)).

                    NOTE: this is not used for interactive sessions, only for command-line fetches.

     no_proxy       A space or comma separated list of hosts (or domains) for which proxying is not to be
                    used.  Each entry may have an optional trailing ":port", which restricts the matching to
                    connections to that port.

EXTENDED PASSIVE MODE AND FIREWALLS
     Some firewall configurations do not allow ftp to use extended passive mode.  If you find that even a
     simple ls appears to hang after printing a message such as this:

           229 Entering Extended Passive Mode (|||58551|)

     then you will need to disable extended passive mode with epsv4 off.  See the above section The .netrc
     File for an example of how to make this automatic.

SEE ALSO
     getservbyname(3), editrc(5), services(5), ftpd(8)

STANDARDS
     ftp attempts to be compliant with:

           RFC0959   File Transfer Protocol

           RFC1123   Requirements for Internet Hosts - Application and Support

           RFC1635   How to Use Anonymous FTP

           RFC2389   Feature negotiation mechanism for the File Transfer Protocol

           RFC2428   FTP Extensions for IPv6 and NATs

           RFC2616   Hypertext Transfer Protocol -- HTTP/1.1

           RFC2822   Internet Message Format

           RFC3659   Extensions to FTP

           RFC3986   Uniform Resource Identifier (URI)

HISTORY
     The ftp command appeared in 4.2BSD.

     Various features such as command line editing, context sensitive command and file completion, dynamic
     progress bar, automatic fetching of files and URLs, modification time preservation, transfer rate
     throttling, configurable command line prompt, and other enhancements over the standard BSD ftp were
     implemented in NetBSD 1.3 and later releases by Luke Mewburn <lukem@NetBSD.org>.

     IPv6 support was added by the WIDE/KAME project (but may not be present in all non-NetBSD versions of
     this program, depending if the operating system supports IPv6 in a similar manner to KAME).

BUGS
     Correct execution of many commands depends upon proper behavior by the remote server.

     An error in the treatment of carriage returns in the 4.2BSD ascii-mode transfer code has been cor-rected. corrected.
     rected.  This correction may result in incorrect transfers of binary files to and from 4.2BSD servers
     using the ascii type.  Avoid this problem by using the binary image type.

     ftp assumes that all IPv4 mapped addresses (IPv6 addresses with a form like ::ffff:10.1.1.1) indicate
     IPv4 destinations which can be handled by AF_INET sockets.  However, in certain IPv6 network configura-tions, configurations,
     tions, this assumption is not true.  In such an environment, IPv4 mapped addresses must be passed to
     AF_INET6 sockets directly.  For example, if your site uses a SIIT translator for IPv6-to-IPv4 transla-tion, translation,
     tion, ftp is unable to support your configuration.

BSD                              July 18, 2007                             BSD

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