man/orig/fetch
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FETCH(1) FreeBSD General Commands Manual FETCH(1)
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[править] NAME
fetch — retrieve a file by Uniform Resource Locator
[править] SYNOPSIS
fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-i file] [-N file] [-o file]
[-S bytes] [-T seconds] [-w seconds] URL ...
fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-i file] [-N file] [-o file]
[-S bytes] [-T seconds] [-w seconds] -h host -f file [-c dir]
[править] DESCRIPTION
The fetch 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 fetch to use IPv4 addresses only.
-6 Forces fetch 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 com‐
patibility 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 compatibil‐
ity only.
-h host The file to retrieve is located on the host host. This
option is deprecated and is provided for backward compatibil‐
ity only.
-i file If-Modified-Since mode: the remote file will only be
retrieved if it is newer than file on the local host. (HTTP
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 pass‐
words 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 ‘-’ indi‐
cates 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. These flags have no effect, since passive
FTP is the default, but are provided for compatibility with
earlier versions where active FTP was the default. To force
active mode, set the FTP_PASSIVE_MODE environment variable to
‘NO’.
-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 con‐
nection 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 fetch 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.
[править] 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_ADDRESS, FTP_LOGIN, FTP_PASSIVE_MODE, FTP_PASSWORD,
FTP_PROXY, ftp_proxy, HTTP_AUTH, HTTP_PROXY, http_proxy, HTTP_PROXY_AUTH,
HTTP_REFERER, HTTP_USER_AGENT, NETRC, NO_PROXY and no_proxy.
[править] EXIT STATUS
The fetch command returns zero on success, or one on failure. If multi‐
ple URLs are listed on the command line, fetch will attempt to retrieve
each one of them in turn, and will return zero only if they were all suc‐
cessfully retrieved.
If the -i argument is used and the remote file is not newer than the
specified file then the command will still return success, although no
file is transferred.
[править] SEE ALSO
fetch(3)
[править] HISTORY
The fetch command appeared in FreeBSD 2.1.5. This implementation first
appeared in FreeBSD 4.1.
[править] AUTHORS
The original implementation of fetch was done by Jean-Marc Zucconi
<jmz@FreeBSD.org>. It was extensively re-worked for FreeBSD 2.2 by
Garrett Wollman <wollman@FreeBSD.org>, and later completely rewritten to
use the fetch(3) library by Dag-Erling Smørgrav <des@FreeBSD.org>.
[править] 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.
FreeBSD 9.0 September 27, 2011 FreeBSD 9.0
