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untar .tar.gz file to a specific file

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# 1  
Old 07-21-2011
untar .tar.gz file to a specific file
Hi,

I'll get a tarred file from a remote location in the format of .tar.gz which my program needs to un-tar it into a specific destination foler and a file

Incoming file
Code:
/local/server/source/path/remote_file.txt.tar.gz

Extracted file
Code:
/local/server/destination/path/un-tar/stage_file.txt

Command I'm using
Code:
tar -C /local/server/destination/path/un-tar -zxvf /local/server/source/path/remote_file.txt.tar.gz stage_file.txt

but that's not what is happening......the un-tarred file though gets created in path /local/server/destination/path/un-tar but with the name remote_file.txt and NOT stage_file.txt!! Is there a way out?

-dips
# 2  
Old 07-21-2011
If your tar implementation supports the --transform option:

Code:
% touch a_file b_file
% mkdir target_dir
% ls -l
total 0
-rw-r--r--  1 sysadmin None 0 Jul 21 13:18 a_file
-rw-r--r--  1 sysadmin None 0 Jul 21 13:18 b_file
drwxr-xr-x+ 1 sysadmin None 0 Jul 21 13:18 target_dir
% tar jcvf test.tar.bz2 *_file
a_file
b_file
% tar xvC target_dir --xform 's/a_file/a_newname/' -f test.tar.bz2 a_file --show-transformed-names
a_newname
% ls target_dir 
a_newname

In your case it should be something like:

Code:
tar -C /local/server/destination/path/un-tar --xform 's/remote_/stage_/' \
-zxvf /local/server/source/path/remote_file.txt.tar.gz stage_file.txt

# 3  
Old 07-21-2011
I don't have --xform option with my tar Smilie

I'm on
Code:
 
Linux xxxxxxxxxxxxx 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

-dips
# 4  
Old 07-21-2011
Why don't you just rename the file after extracting it?
# 5  
Old 07-21-2011
I am confused. if the tarball contained the file "remote_file.txt" then
Code:
tar -C /local/server/destination/path/un-tar -zxvf /local/server/source/path/remote_file.txt.tar.gz stage_file.txt

should not have untarred it as the filename doesn't match.

In any case, you should be able to use the -O option to output to stdout. For example, if you know that the tarball contains exactly one file, try:
Code:
tar -zxvf /local/server/source/path/remote_file.txt.tar.gz -O > /local/server/destination/path/un-tar/stage_file.txt

These 2 Users Gave Thanks to DoxieLvr For This Post:
dips_ag radoulov
# 6  
Old 07-22-2011
Hi DoxieLvr,
Quote:
Originally Posted by DoxieLvr
I am confused. if the tarball contained the file "remote_file.txt" then
Code:
tar -C /local/server/destination/path/un-tar -zxvf /local/server/source/path/remote_file.txt.tar.gz stage_file.txt

should not have untarred it as the filename doesn't match.
[/CODE]
That's true!! I might have tried many options Smilie but pasted here something wrong!! Smilie

Quote:
Originally Posted by DoxieLvr
In any case, you should be able to use the -O option to output to stdout. For example, if you know that the tarball contains exactly one file, try:
Code:
tar -zxvf /local/server/source/path/remote_file.txt.tar.gz -O > /local/server/destination/path/un-tar/stage_file.txt

Works perfect!! Smilie. Thanks so much!!

Hi radoulov,
Quote:
Originally Posted by radoulov
Why don't you just rename the file after extracting it?
The problem is there is very high chance that the client will send us a .tar.gz file having the archived file of something totally different name; I would not know which file(name) it had un-tarred!! Hence this option is not viable.

-dips
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