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.\"-
.\" Copyright (c) 2000 Dag-Erling Co<43>dan Sm<53>rgrav
.\" All rights reserved.
2000-07-05 12:04:31 +00:00
.\" Portions Copyright (c) 1999 Massachusetts Institute of Technology; used
.\" by permission.
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.\"
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.\" modification, are permitted provided that the following conditions
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.\" derived from this software without specific prior written permission.
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.\" $FreeBSD$
.\"
.Dd June 28, 2000
.Dt FETCH 1
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.Os
.Sh NAME
.Nm fetch
.Nd retrieve a file by Uniform Resource Locator
.Sh SYNOPSIS
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.Nm
.Op Fl 146AFHMPRadlmnpqrsv
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.Op Fl B Ar bytes
.Op Fl S Ar bytes
.Op Fl T Ar seconds
.Op Fl o Ar file
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.Op Fl w Ar seconds
.Op Fl h Ar host
.Op Fl c Ar dir
.Op Fl f Ar file
.Op Ar URL ...
.Sh DESCRIPTION
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.Nm Fetch
provides a command-line interface to the
.Xr fetch 3
library.
Its purpose is to retrieve the file(s) pointed to by the URL(s) on the
command line.
.Pp
The following options are available:
.Bl -tag -width Fl
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.It Fl \&1
Stop and return exit code 0 at the first successfully retrieved file.
.It Fl 4
Forces
.Nm
to use IPv4 addresses only.
.It Fl 6
Forces
.Nm
to use IPv6 addresses only.
.It Fl A
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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.
.It Fl a
Automatically retry the transfer upon soft failures.
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.It Fl B Ar 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
.Fl v
flag).
.It Fl c Ar dir
The file to retrieve is in directory
.Ar dir
on the remote host.
This option is deprecated and is provided for backward compatibility
only.
.It Fl d
Use a direct connection even if a proxy is configured.
.It Fl F
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In combination with the
.Fl r
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flag, forces a restart even if the local and remote files have
different modification times.
.It Fl f Ar file
The file to retrieve is named
.Ar file
on the remote host.
This option is deprecated and is provided for backward compatibility
only.
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.It Fl H
When using passive FTP, allocate a high port for the data connection.
See
.Xr ip 4
for details on how to specify which port range this corresponds to.
.It Fl h Ar host
The file to retrieve is located on the host
.Ar host .
This option is deprecated and is provided for backward compatibility
only.
.It Fl l
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If the target is a file-scheme URL, make a symbolic link to the target
rather than trying to copy it.
.It Fl M
.It Fl 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
.Fl m
and
.Fl r
flags are mutually exclusive.
.It Fl n
Don't preserve the modification time of the transferred file.
.It Fl o Ar file
Set the output file name to
.Ar file .
By default, a ``pathname'' is extracted from the specified URI, and
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its basename is used as the name of the output file.
A
.Ar file
argument of
.Sq Li \&-
indicates that results are to be directed to the standard output.
.It Fl P
.It Fl p
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Use passive FTP.
This is useful if you are behind a firewall which blocks incoming
connections.
Try this flag if
.Nm
seems to hang when retrieving FTP URLs.
.It Fl q
Quiet mode.
.It Fl R
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The output files are precious, and should not be deleted under any
circumstances, even if the transfer failed or was incomplete.
.It Fl r
Restart a previously interrupted transfer.
Note that the
.Fl m
and
.Fl r
flags are mutually exclusive.
.It Fl S Ar bytes
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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.
.It Fl s
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Print the size in bytes of each requested file, without fetching it.
.It Fl T Ar seconds
Set timeout value to
.Ar seconds.
Overrides the environment variables
.Ev FTP_TIMEOUT
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for FTP transfers or
.Ev HTTP_TIMEOUT
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for HTTP transfers if set.
.It Fl v
Increase verbosity level.
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.It Fl w Ar seconds
When the
.Fl a
flag is specified, wait this many seconds between successive retries.
.El
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.Sh DIAGNOSTICS
The
.Nm
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command returns zero on success, or one on failure.
If multiple URLs are listed on the command line,
.Nm
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will attempt to retrieve them each of them in turn, and return zero
only if they were all successfully retrieved.
.Sh ENVIRONMENT
.Bl -tag -width FTP_PASSIVE_MODE -offset indent
.It Ev FTP_TIMEOUT
maximum time, in seconds, to wait before aborting an
.Tn FTP
connection.
.It Ev HTTP_TIMEOUT
maximum time, in seconds, to wait before aborting an
.Tn HTTP
connection.
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.El
.Pp
All environment variables mentioned in the documentation for the
.Xr fetch 3
library are supported.
.Sh SEE ALSO
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.Xr fetch 3
.Sh HISTORY
The
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.Nm
1996-08-23 00:57:08 +00:00
command appeared in
.Fx 2.1.5 .
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This implementation first appeared in
.Fx 4.1 .
.Sh AUTHORS
The original implementation of
.Nm
was done by
.An Jean-Marc Zucconi .
It was extensively re-worked for
.Fx 2.2
by
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.An Garrett Wollman ,
and later completely rewritten to use the
.Xr fetch 3
library by
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.An Dag-Erling Sm\(/orgrav .
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.Sh NOTES
The
.Fl b
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and
.Fl t
options are no longer supported and will generate warnings.
They were workarounds for bugs in other OSes which this implementation
does not trigger.
.Pp
One cannot both use the
.Fl h ,
.Fl c
and
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.Fl f
options and specify URLs on the command line.