The
utility provides a command-line interface to the
fetch(3)
library.
Its purpose is to retrieve the file(s) pointed to by the URL(s) on the
command line.
The following options are available:
-1
Stop and return exit code 0 at the first successfully retrieved file.
-4
Forces
to use IPv4 addresses only.
-6
Forces
to use IPv6 addresses only.
-A
Do not automatically follow ``temporary'' (302) redirects.
Some broken Web sites will return a redirect instead of a not-found
error when the requested object does not exist.
-a
Automatically retry the transfer upon soft failures.
-B bytes
Specify the read buffer size in bytes.
The default is 4096 bytes.
Attempts to set a buffer size lower than this will be silently
ignored.
The number of reads actually performed is reported at verbosity level
two or higher (see the
-v
flag).
-c dir
The file to retrieve is in directory
dir
on the remote host.
This option is deprecated and is provided for backward compatibility
only.
-d
Use a direct connection even if a proxy is configured.
-F
In combination with the
-r
flag, forces a restart even if the local and remote files have
different modification times.
Implies
-R
-f file
The file to retrieve is named
file
on the remote host.
This option is deprecated and is provided for backward compatibility
only.
-h host
The file to retrieve is located on the host
host
This option is deprecated and is provided for backward compatibility
only.
-l
If the target is a file-scheme URL, make a symbolic link to the target
rather than trying to copy it.
-M
-m
Mirror mode: if the file already exists locally and has the same size
and modification time as the remote file, it will not be fetched.
Note that the
-m
and
-r
flags are mutually exclusive.
-N file
Use
file
instead of
~/.netrc
to look up login names and passwords for FTP sites.
See
ftp(1)
for a description of the file format.
This feature is experimental.
-n
Do not preserve the modification time of the transferred file.
-o file
Set the output file name to
file
By default, a ``pathname'' is extracted from the specified URI, and
its basename is used as the name of the output file.
A
file
argument of
`-
'
indicates that results are to be directed to the standard output.
If the
file
argument is a directory, fetched file(s) will be placed within the
directory, with name(s) selected as in the default behaviour.
-P
-p
Use passive FTP.
This is useful if you are behind a firewall which blocks incoming
connections.
Try this flag if
seems to hang when retrieving FTP URLs.
-q
Quiet mode.
-R
The output files are precious, and should not be deleted under any
circumstances, even if the transfer failed or was incomplete.
-r
Restart a previously interrupted transfer.
Note that the
-m
and
-r
flags are mutually exclusive.
-S bytes
Require the file size reported by the server to match the specified
value.
If it does not, a message is printed and the file is not fetched.
If the server does not support reporting file sizes, this option is
ignored and the file is fetched unconditionally.
-s
Print the size in bytes of each requested file, without fetching it.
-T seconds
Set timeout value to
seconds
Overrides the environment variables
FTP_TIMEOUT
for FTP transfers or
HTTP_TIMEOUT
for HTTP transfers if set.
-U
When using passive FTP, allocate the port for the data connection from
the low (default) port range.
See
ip(4)
for details on how to specify which port range this corresponds to.
-v
Increase verbosity level.
-w seconds
When the
-a
flag is specified, wait this many seconds between successive retries.
If
receives a
SIGINFO
signal (see the
status
argument for
stty(1)),
the current transfer rate statistics will be written to the
standard error output, in the same format as the standard completion
message.
ENVIRONMENT
FTP_TIMEOUT
Maximum time, in seconds, to wait before aborting an FTP connection.
HTTP_TIMEOUT
Maximum time, in seconds, to wait before aborting an HTTP connection.
See
fetch(3)
for a description of additional environment variables, including
FETCH_BIND_ADDRESSFTP_LOGINFTP_PASSIVE_MODEFTP_PASSWORDFTP_PROXYftp_proxyHTTP_AUTHHTTP_PROXYhttp_proxyHTTP_PROXY_AUTHHTTP_REFERERHTTP_USER_AGENTNETRCNO_PROXY andno_proxy
EXIT STATUS
The
command returns zero on success, or one on failure.
If multiple URLs are listed on the command line,
will attempt to retrieve each one of them in turn, and will return
zero only if they were all successfully retrieved.
The
command appeared in
Fx 2.1.5 .
This implementation first appeared in
Fx 4.1 .
AUTHORS
An -nosplit
The original implementation of
was done by
An Jean-Marc Zucconi Aq [email protected] .
It was extensively re-worked for
Fx 2.2
by
An Garrett Wollman Aq [email protected] ,
and later completely rewritten to use the
fetch(3)
library by
An Dag-Erling Sm/orgrav Aq [email protected] .
NOTES
The
-b
and
-t
options are no longer supported and will generate warnings.
They were workarounds for bugs in other OSes which this implementation
does not trigger.
One cannot both use the
-h
-c
and
-f
options and specify URLs on the command line.
