Weeeellll, with a bit of bodging you can sort of do this.
Tar allows you to operate on an incoming stream (it was originally designed for this) and stop when you've got all you want. You still need to seek through the file until you've found all the files you want:
This will seek through the tarball, streaming off the ftp server and pop the file you want off as it passes. You can specify multiple files on the one commandline but this will only work if you know the files (although you could try passing an escaped wildcard and see how you go - you'll have to manually abort the extract once you feel you have all the files you want though).
You can also pass the "--files-from <file containing the filnames you want>" flag to tar if you prefer.
Note that this won't save you loads of time, especially so if all the files you want are at the end of the archive, but it will help if they are at the start of the file and it's an interesting exercise in streams.
This User Gave Thanks to Smiling Dragon For This Post:
hi
please help me out here,
i want to use curl command in shell script to test web pages,
what i have is an opening page, when i click on a button on opening page, the next page comes up and then i have to upload a file n then click another button to submit and then comes the output page,... (2 Replies)
Hi
I'm trying to download an xml file from a https server using curl on a Linux machine with Ubuntu 10.4.2
I am able to connect to the remote server with my username and password but the output is only "Virtual user <username> logged in".
I am expecting to download the xml file.
My output... (4 Replies)
Hi
I need a Shell script that will download a zip file every second from a http server but i can't use neither curl nor wget.
Can anyone will help me go about this task ???
Thanks!! (1 Reply)
Hi,
I need to implement below logic to download files daily from a URL.
* Need to check if it is yesterday's file (YYYY-DD-MM.dat)
* If present then download from URL (sample_url/2013-01-28.dat)
* Need to implement wait logic if not present
* if it still not able to find the file... (1 Reply)
Hello all,
I have been struggling with this issue on and off for a couple of weeks now and I just got it all working, so I wanted to share my findings in case some other poor soul needs to know how. First some background on what I'm doing. I am uploading files to different directories based on... (0 Replies)
Need Assistance . Using wget how can i download multiple files from http site. Http doesnt has wild card (*) but FTP has it . Any ideas will be appreciative.
wget --timeout=120 --append-output=output.txt --no-directories --cut-dirs=1 -np -m --accept=grib2 -r http://sample.com/... (4 Replies)
Hi,
I need to download a zip file from my the below US govt link.
https://www.sam.gov/SAMPortal/extractfiledownload?role=WW&version=SAM&filename=SAM_PUBLIC_MONTHLY_20160207.ZIP
I only have wget utility installed on the server.
When I use the below command, I am getting error 403... (2 Replies)
I am using the below curl command to download a single file from client server and it is working as expected
curl --ftp-ssl -k -u ${USER}:${PASSWD} ftp://${HOST}:${PORT}/path/to/${FILE} --output ${DEST}/${FILE}
let say the client has 3 files hellofile.101, hellofile.102, hellofile.103 and I... (3 Replies)
Discussion started by: r@v!7*7@
3 Replies
LEARN ABOUT OSX
tar
tar(n) Tar file handling tar(n)
__________________________________________________________________________________________________________________________________________________NAME
tar - Tar file creation, extraction & manipulation
SYNOPSIS
package require Tcl 8.4
package require tar ?0.6?
::tar::contents tarball
::tar::stat tarball ?file?
::tar::untar tarball args
::tar::get tarball fileName
::tar::create tarball files args
::tar::add tarball files args
::tar::remove tarball files
_________________________________________________________________DESCRIPTION
::tar::contents tarball
Returns a list of the files contained in tarball. The order is not sorted and depends on the order files were stored in the archive.
::tar::stat tarball ?file?
Returns a nested dict containing information on the named ?file? in tarball, or all files if none is specified. The top level are
pairs of filename and info. The info is a dict with the keys "mode uid gid size mtime type linkname uname gname devmajor devminor
% ::tar::stat tarball.tar
foo.jpg {mode 0644 uid 1000 gid 0 size 7580 mtime 811903867 type file linkname {} uname user gname wheel devmajor 0 devminor 0}
::tar::untar tarball args
Extracts tarball. -file and -glob limit the extraction to files which exactly match or pattern match the given argument. No error is
thrown if no files match. Returns a list of filenames extracted and the file size. The size will be null for non regular files.
Leading path seperators are stripped so paths will always be relative.
-dir dirName
Directory to extract to. Uses pwd if none is specified
-file fileName
Only extract the file with this name. The name is matched against the complete path stored in the archive including directo-
ries.
-glob pattern
Only extract files patching this glob style pattern. The pattern is matched against the complete path stored in the archive.
-nooverwrite
Dont overwrite files that already exist
-nomtime
Leave the file modification time as the current time instead of setting it to the value in the archive.
-noperms
In Unix, leave the file permissions as the current umask instead of setting them to the values in the archive.
% foreach {file size} [::tar::untar tarball.tar -glob *.jpg] {
puts "Extracted $file ($size bytes)"
}
::tar::get tarball fileName
Returns the contents of fileName from the tarball
% set readme [::tar::get tarball.tar doc/README] {
% puts $readme
}
::tar::create tarball files args
Creates a new tar file containing the files. files must be specified as a single argument which is a proper list of filenames.
-dereference
Normally create will store links as an actual link pointing at a file that may or may not exist in the archive. Specifying
this option will cause the actual file point to by the link to be stored instead.
% ::tar::create new.tar [glob -nocomplain file*]
% ::tar::contents new.tar
file1 file2 file3
::tar::add tarball files args
Appends files to the end of the existing tarball. files must be specified as a single argument which is a proper list of filenames.
-dereference
Normally add will store links as an actual link pointing at a file that may or may not exist in the archive. Specifying this
option will cause the actual file point to by the link to be stored instead.
-prefix string
Normally add will store files under exactly the name specified as argument. Specifying a ?-prefix? causes the string to be
prepended to every name.
-quick The only sure way to find the position in the tarball where new files can be added is to read it from start, but if tarball
was written with a "blocksize" of 1 (as this package does) then one can alternatively find this position by seeking from the
end. The ?-quick? option tells add to do the latter.
::tar::remove tarball files
Removes files from the tarball. No error will result if the file does not exist in the tarball. Directory write permission and free
disk space equivalent to at least the size of the tarball will be needed.
% ::tar::remove new.tar {file2 file3}
% ::tar::contents new.tar
file3
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category tar of
the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
KEYWORDS
archive, tape archive, tar
CATEGORY
File formats
tar 0.6 tar(n)