Bash to add unique prefix to extracted zip folder Post: 303033334

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Top Forums Shell Programming and Scripting Bash to add unique prefix to extracted zip folder Post 303033334 by rbatte1 on Wednesday 3rd of April 2019 12:02:00 PM

04-03-2019

Moderator

Hello cmccabe,

I think that you are trying to do this in a single step, but actually you need to have more. Your attempt also has to be certain that you only have one file in each .zip but it's not clear if this is the case.

The problem is that unzip probably doesn't just give you the extracted filename(s) as output. You might well be better to make a temporary directory to extract the files to, then process all the files you find there. If the files are large, make the temporary directory in the same filesystem as the desired target. The default for mktemp is to make a directory with pattern /tmp/tmp.XXXXXXXX (might vary depending on OS) but you can set a template for the name to use so I have used it to set this all up in /data. Obviously change this to something meaningful for yourself.

There are a few variations on what you are asking for, but I've guessed at this one:-

Code:

target_dir=/data
for zipfile in /home/cmccabe/tmp/*.zip
do
   workdir=$(mktemp -d "${target_dir}"/tmp.XXXXX)                          # Creates the temporary directory and catches the name
   unzip -d "${workdir}" "${zipfile}"
   prefix="${zipfile%%_*}"                                                     # Grab the interesting bit for this input file
   for extracted_file in ${workdir}                                     
   do
      mv "${extracted_file}" "${target_dir}/${prefix}"                              # Move to desired location and rename in one step
   done
done

Does that do what you need or have I misunderstood your requirement?

I you are extracting multiple files, we might need to add a find into the loop to update the files safely.

Kind regards,
Robin

rbatte1

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zipnote

zipnote(1)						      General Commands Manual							zipnote(1)

NAME

       zipnote - write the comments in zipfile to stdout, edit comments and rename files in zipfile

SYNOPSIS

       zipnote [-w] [-b path] [-h] [-v] [-L] zipfile

ARGUMENTS

       zipfile	Zipfile to read comments from or edit.

OPTIONS

       -w     Write comments to a zipfile from stdin (see below).

       -b path
	      Use path for the temporary zip file.

       -h     Show a short help.

       -v     Show version information.

       -L     Show software license.

DESCRIPTION

       zipnote	writes the comments in a zipfile to stdout.  This is the default mode.	A second mode allows updating the comments in a zipfile as
       well as allows changing the names of the files in the zipfile.  These modes are described below.

EXAMPLES

       To write all comments in a zipfile to stdout use for example

	    zipnote foo.zip > foo.tmp

       This writes all comments in the zipfile foo.zip to the file foo.tmp in a specific format.

       If desired, this file can then be edited to change the comments and then used to update the zipfile.

	    zipnote -w foo.zip < foo.tmp

       The names of the files in the zipfile can also be changed in this way.  This is done by following lines like
	    "@ name"
       in the created temporary file (called foo.tmp here) with lines like
	    "@=newname"
       and then using the -w option as above.

BUGS

       The temporary file format is rather specific and zipnote is rather picky about it.  It should be easier to change file names in a script.

       Does not yet support large (> 2 GB) or split archives.

SEE ALSO

       zip(1), unzip(1)

AUTHOR

       Info-ZIP

								v3.0 of 8 May 2008							zipnote(1)