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Full Discussion: Extracting file from .tar.gz file
Top Forums Shell Programming and Scripting Extracting file from .tar.gz file Post 302836753 by alister on Wednesday 24th of July 2013 03:34:25 PM
Old 07-24-2013
Quote:
Originally Posted by Don Cragun
Code:
tar -ztf file.tar.gz | grep -E '(^|/)D.*T(/|$)'

Again, this does not save the entire uncompressed archive to disk. And, of course, if you try this and find that it gives you the list of files you want, you could try:
Code:
tar -zxf file.tar.gz $(tar -ztf file.tar.gz | grep -E '(^|/)D.*T(/|$)')

as long as the list of filenames to be processed doesn't cause that command line to overflow your system's ARG_MAX limit.
It looks to me like your grep regular expression is underspecified, because D.*T is allowed to span pathname components. [^/] seems a better choice.

Regarding avoiding ARG_MAX, one filename per line can be read from a file, using GNU tar's -T or BSD tar's -I. Perhaps other implementations offer similar functionality.

To the OP:
When asking for help with tar, always specify the implementation you're using (or at least the operating system). Aside from core functionality, tar isn't well standardized.

If you're using GNU tar (untested):
Code:
tar xzf file.tar.gz --wildcards --no-anchored 'D*T'

Regards,
Alister
Last edited by alister; 07-24-2013 at 04:40 PM..
 

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LEARN ABOUT LINUX

shape_tar

SHAPE_TAR(1)						      General Commands Manual						      SHAPE_TAR(1)

NAME

       shape_tar - shapeTools RMS bundle up subsystem in a tar or shar archive

SYNOPSIS

	shape tar[VERSIONS=<version_selection_rule>] [ARCHIVE=<filename>]

       shape shar[VERSIONS=<version_selection_rule>] [ARCHIVE=<filename>]

DESCRIPTION

       Shape tar and shape shar create a tar or a shar archive containing all source components of the current node in the system tree. All source
       components listed in the COMPONENTS macro in the Makefile and the release identification file (VERSIONFILE) are	written  to  the  archive.
       Components of subsystems are not included in the archive file.

       The  VERSIONS  macro  may  be  set  to  specify a version selection rule to be active during archive file creation. Default is most_recent,
       selecting the most recent version of each component. See shape_stdrul(7) or the $(SHAPELIBPATH)/stdrules for other possible  settings.  You
       may also use self defined version selection rules as VERSIONS.

       ARCHIVE	is  the base name of the file where the output shall be written to. Default is $(SUBSYSTEMNAME). The output file gets the filename
       extension .tar (resp. .shar).  When ARCHIVE=- is given, data will be written to standard output.

SEE ALSO

       shape_RMS(1), shape_stdrul(7)

FILES

       $(SUBSYSTEMNAME).tar $(SUBSYSTEMNAME).shar

24.8.119															      SHAPE_TAR(1)
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