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Full Discussion: Random File Selection and Moving
Top Forums Shell Programming and Scripting Random File Selection and Moving Post 302544590 by stak1993 on Thursday 4th of August 2011 09:45:52 AM
Old 08-04-2011
Random File Selection and Moving
OK, I am stumpped. I have this shell Script that I want to randomly select a file with the extention of .sct. Then using a portion of its file name select the six related .mot files. Then move them all to another folder. I also need a user input form for the number of .SCT files to randomly select and move.
So I have a file structure like this:
Code:
123-12345-00.sct
123-12345-00.mot
123-12345-01.mot
123-12345-02.mot
123-12345-03.mot
123-12345-04.mot
123-12345-05.mot
123-12346-00.sct
123-12346-00.mot
123-12346-01.mot
123-12346-02.mot
123-12346-03.mot
123-12346-04.mot
123-12346-05.mot

And so on.

Need to randomly select the file .sct and move it and its related .mot files to another directory. Hopefully I have explained this good enough.
Thanks for the help. I could do this in VB but this UNIX thing has me stumpped. Right now we do it manualy through thousands of files.

So here is the script I want to use. It isn't working I can't get past the
Code:
 if [ ! -d "$dir" ]; then echo "$0: $dir: no such directory"; exit; fi;


Code:
  #! /usr/bin/env bash
    dir="$1"
    count="$2"
    [ "$dir" ] && [ $count -gt 0 ] && {
           if [ ! -d "$dir" ]; then echo "$0: $dir: no such directory"; exit; fi;
           RANDOM=$$$(date +%s)                    #init random seed
           for (( c=0; c < $count; c++ )); do
                files=(*.sct)                       #creates array of sct files
                  ct=${#files[@]}                     #computes array length
                if [ $ct -eq 0 ]; then break; fi
                sct=${files[$[($RANDOM % $ct)]]}    #pick random file
                prefix=$(echo $sct | sed 's:\(.*-\).*:\1:')
                mot_files=($(ls $prefix*.mot 2> /dev/null))
                mv $sct $dir
            if [ ${#mot_files[@]} -gt 0 ]; then 
                mv ${mot_files[@]} $dir  #
            fi
            done
        } || echo "usage: $0 <dir> <num of files>"

Thanks for any help you can provide.

Scott
Last edited by pludi; 08-04-2011 at 10:35 AM..
 

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LEARN ABOUT LINUX

shtool-move

SHTOOL-MOVE.TMP(1)					      GNU Portable Shell Tool						SHTOOL-MOVE.TMP(1)

NAME

       shtool-move - GNU shtool enhanced mv(1) replacement

SYNOPSIS

       shtool move [-v|--verbose] [-t|--trace] [-e|--expand] [-p|--preserve] src-file dst-file

DESCRIPTION

       This is a mv(1) style command enhanced with the ability to rename multiple files in a single operation and the ability to detect and not
       touch existing equal destinations files, thus preserving timestamps.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -e, --expand
	   Expand asterisk in src to be used as ""%"n" (where n is 1,2,...) in dst-file. This is useful for renaming multiple files at once.

       -p, --preserve
	   Detect src-file and dst-file having equal content and not touch existing destination files, thus perserving timestamps. This is useful
	   for applications that monitor timestamps, i.e. suppress make(1L) repeating actions for unchanged files.

EXAMPLE

	#   shell script
	shtool move -v -e '*.txt' %1.asc

	#   Makefile
	scanner.c: scanner.l
	    lex scanner.l
	    shtool move -t -p lex.yy.c scanner.c

HISTORY

       The GNU shtool move command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1999 for GNU shtool.

SEE ALSO

       shtool(1), mv(1), make(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-MOVE.TMP(1)
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