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Top Forums UNIX for Dummies Questions & Answers Grep through a .tar file without untarring it Post 302935441 by agent.kgb on Monday 16th of February 2015 04:01:22 PM
Old 02-16-2015
check if file name ends with tar:

Code:
filename="blabla.tar"

if [[ "$filename" == "${filename%%.tar}" ]] ; then
  echo "is not tar"
else
  echo "is tar"
fi

check if file really a tar archive:

Code:
file filename.tar

 

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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 21.8.119 SHAPE_TAR(1)
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