Computer Science
ncftpget(1) ncftpget(1)
NAME
ncftpget - Internet file transfer program for scripts
SYNOPSIS
ncftpget [options] remote-host local-directory remote-
files...
ncftpget -f login.cfg [options] local-directory remote-
files...
ncftpget [options] ftp://url.style/host/path/name
OPTIONS
Command line flags:
-u XX Use username XX instead of anonymous.
-p XX Use password XX with the username.
-P XX Use port number XX instead of the default FTP ser-
vice port (21).
-d XX Use the file XX for debug logging.
-a Use ASCII transfer type instead of binary.
-t XX Timeout after XX seconds.
-v/-V Do (do not) use progress meters. The default is
to use progress meters if the output stream is a
TTY.
-f XX Read the file XX for host, user, and password
information.
-A Append to local files, instead of overwriting
them.
-z/-Z Do (do not) try to resume transfers. The default
is to try to resume (-z).
-F Use passive (PASV) data connections.
-DD Delete remote file after successfully downloading
it.
-R Recursive mode; copy whole directory trees.
-r XX Redial a maximum of XX times until connected to
the remote FTP server.
DESCRIPTION
The purpose of ncftpget is to do file transfers from the
command-line without entering an interactive shell. This
lets you write shell scripts or other unattended processes
that can do FTP. It is also useful for advanced users who
want to retrieve files from the shell command line without
entering an interactive FTP program such as ncftp.
One particularly useful feature of this program is that
you can give it a uniform resource locator as the only
argument and the program will download that file. You can
then copy and paste from your web browser or newsreader
and use that URL. Example:
$ cd /tmp
$ ncftpget ftp://ftp.probe.net/pub/ncftp/ncftp.tar.Z
$ zcat ncftp.tar.Z | tar xf -
By default the program tries to open the remote host and
login anonymously, but you can specify a username and
password information. The -u option is used to specify
the username to login as, and the -p option is used to
specify the password. If you are running the program from
the shell, you may omit the -p option and the program will
prompt you for the password.
Using the -u and -p options are not recommended, because
your account information is exposed to anyone who can see
your shell script or your process information. For exam-
ple, someone using the ps program could see your password
while the program runs.
You may use the -f option instead to specify a file with
the account information. However, this is still not
secure because anyone who has read access to the informa-
tion file can see the account information. Nevertheless,
if you choose to use the -f option the file should look
something like this:
host Bozo.probe.net
user gleason
pass mypasswd
Don't forget to change the permissions on this file so no
one else can read them.
The -d option is very useful when you are trying to diag-
nose why a file transfer is failing. It prints out the
entire FTP conversation to the file you specify, so you
can get an idea of what went wrong. If you specify the
special name stdout as the name of the debugging output
file, the output will instead print to the screen. Exam-
ple:
$ ncftpget -d stdout ftp.probe.net . /pub/ncftp/README
220: ftp.probe.net FTP server ready.
Connected to ftp.probe.net.
Cmd: USER anonymous
331: Guest login ok, send your complete e-mail address
as password.
Cmd: PASS xxxxxxxx
230: Welcome!
Logged in to ftp.probe.net as anonymous.
Cmd: TYPE I
200: Type set to I.
Cmd: SIZE /pub/ncftp/README
550: /pub/ncftp/README: not a plain file.
Cmd: MDTM /pub/ncftp/README
550: /pub/ncftp/README: No such file or directory.
Cmd: PORT 192,168,1,17,6,76
200: PORT command successful.
Cmd: RETR /pub/ncftp/README
550: /pub/ncftp/README: No such file OR directory.
ncftpget: file retrieval error: could not start data
transfer.
Cmd: QUIT
221: Goodbye.
Using ASCII mode is helpful when the text format of your
host differs from that of the remote host. For example,
if you are retrieving a .TXT file from a Windows-based
host to a UNIX system, you could use the -a flag which
would use ASCII transfer mode so that the file created on
the UNIX system would be in the UNIX text format instead
of the MS-DOS text format.
You can retrieve an entire directory tree of files by
using the -R flag. However, this will work only if the
remote FTP server is a UNIX server, or emulates UNIX's
list output. Example:
$ ncftpget -R ftp.probe.net /tmp /pub/ncftp
This would create a /tmp/ncftp hierarchy.
DIAGNOSTICS
ncftpget returns the following exit values:
0 Success.
1 Could not connect to remote host.
2 Could not connect to remote host - timed out.
3 Transfer failed.
4 Transfer failed - timed out.
5 Directory change failed.
6 Directory change failed - timed out.
7 Malformed URL.
8 Usage error.
9 Error in login configuration file.
10 Library initialization failed.
11 Session initialization failed.
AUTHOR
Mike Gleason, NCEMRSoft (mgleason@probe.net).
SEE ALSO
ncftpput(1), ncftp(1), ftp(1), rcp(1), tftp(1).
LibNcFTP (http://www.probe.net/~mgleason/libncftp).
NCEMRSoft 1
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