You have to store data somewhere. We have two choices - memory or mass storage (tape, disk, etc). You just eliminated one, so we are left with memory. That means a program has to receive the data
When tar outputs, not just data comes out, also metadata. So you get to filter it out, I don't know how to do that a priori.
Code:
tar xvf somefile.tar /full/path/to/file/to/extract.dat | ( your program lives in here )
Your program has to read from stdin, pitch metadata, and then keep real data. I wonder what you do with it then if you don't put some of it to disk or the tty.
The only point I would make is this is an odd request as tar is inherently slower than disk I/O, so why would you do all this? No spare disk space?
Hey guys complete n00b here so I'll try my best at explaining.
I'm creating a backup and restore utility and decided to use tar. I create a backup folder in each user's account and when backing up (say word processing files), I use the following:
tar cvf /home/user/backup/wpbackup.tar... (2 Replies)
hi,
I am in a weird situation. I have a parent tarball which contains 2 sub tarballs.
The structure is such :
Parent.tar.gz ---- > child1.tar.gz and child2.tar.gz
I need to get the size of the parent tarball without untaring it
I know that the command is gunzip -c parent.tar.gz | wc -c ... (1 Reply)
Hi,
I have tar filw which has multiple directories which contain files.
When i extract using tar -xf the directory structure also get extracted.
I require only files and not directory structures as there will be overhead of moving the files again.
So i searched here and got a solution but... (4 Replies)
Hi
Somebody must have done this before, but I can't seem to find any answer on my problem.
On HP-UX 11i v3 I have a relatively large tar ball (~120 GB), and I want to create the directory structure only from the archive.
There is no option to make a new archive with only the directory... (3 Replies)
Hi All,
I would like to know couple of ways to list the content available in tar and gzipped file without extracting.
i.e., I would like to display the contents of test.tar.gz without extracting.
Note :: please suggest a command other that tar -ztvf (9 Replies)
#cat a
BAC064DAL
BAC063DAL
BAC056PHX
BAC066DAL
BAC062PHX
BAC062DAL
BAC060DAL
BAC058PHX
BAC054PHX
BAC051PHX
# for i in `cat a`
> do
> tar xvf $a/$a*.tar*
> done
tar: /*.tar*: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
tar: /*.tar*: Cannot... (3 Replies)
Hi,
uname -a
SunOS mymac 5.11 11.2 sun4u sparc SUNW,SPARC-Enterprise
I need to tar a folder /tmp/moht but do not want these three folders to be included in the tar file -> savejpg, bmpsave and imgsave
I tried --exclude, -path, -not options but it says bad option
Can you help me with... (3 Replies)
I have a tar file hello.tar which is 95 GB.
hello.tar has many files and folders including some tar files as well.
I wish to create a new tar ball which should maintain only the folder structure of hello.tar and the tar ball within the hello.tar
So basically the idea is to untar... (2 Replies)
Hi all. I'm hitting a problem creating a tar archive in one directory from files located in a different directory. It fails when I replace the absolute paths with variables in the script but works if I just run tar on the cmdln. E.g.
#!/bin/ksh
BASE=$PWD
STAGE=$BASE/stage
LOG=$BASE/log... (4 Replies)
Hi Team,
Following unix command is throwing error. Can anyone please help me to fix the issue?
tar -cvf /aa/bb/cc/tarball1.tar /x/y/z1/abc.ksh /x/y/z2/pqr.txt /x/y/z3/lmn.tmp
Error message thrown:
tar: Removing leading `/' from member names
OS: uname -a
Linux xyz... (1 Reply)
Discussion started by: kmanivan82
1 Replies
LEARN ABOUT HPUX
tar
tar(4) Kernel Interfaces Manual tar(4)NAME
tar - format of tar tape archive
DESCRIPTION
The header structure produced by (see tar(1)) is as follows (the array size defined by the constants is shown on the right):
All characters are represented in ASCII. There is no padding used in the header block; all fields are contiguous.
The fields magic, uname, and gname are null-terminated character strings. The fields name, linkname, and prefix are null-terminated char-
acter strings except when all characters in the array contain non-null characters, including the last character. The version field is two
bytes containing the characters (zero-zero). The typeflag contains a single character. All other fields are leading-zero-filled octal
numbers in ASCII. Each numeric field is terminated by one or more space or null characters.
The name and the prefix fields produce the pathname of the file. The hierarchical relationship of the file is retained by specifying the
pathname as a path prefix, with a slash character and filename as the suffix. If the prefix contains non-null characters, prefix, a slash
character, and name are concatenated without modification or addition of new characters to produce a new pathname. In this manner, path-
names of at most 256 characters can be supported. If a pathname does not fit in the space provided, the format-creating utility notifies
the user of the error, and no attempt is made to store any part of the file, header, or data on the medium.
SEE ALSO tar(1)STANDARDS CONFORMANCE tar(4)