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1 #!/bin/sh |
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2 |
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3 # Add a numeric prefix starting at $1, incrementing by $2 on $3..$n files |
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4 |
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5 # (c) 2005 J?r?me SAUTRET <jerome@sautret.org> |
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6 # This script is distributed under GNU GPL. Ask Stallman for details. |
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7 |
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8 # $Id: add_num_prefix,v 1.1 2005/08/22 19:58:27 jerome Exp $ |
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9 |
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10 set -o errexit |
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11 if [ -z "$3" ] ; then |
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12 cat <<EoF |
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13 Usage: |
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14 `basename $0` start step files... |
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15 Add a numeric prefix starting at 'start', incrementing by 'step' on 'files'. |
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16 EoF |
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17 exit 1 |
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18 fi |
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19 |
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20 set -o nounset |
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21 min=$1 |
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22 len=`echo $1|wc -c|sed 's/^ *//'` |
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23 let len=len-1 |
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24 min=`echo $min|sed 's/^0*//'` |
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25 inc=$2 |
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26 shift 2 |
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27 files="$@" |
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28 |
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29 i=$min |
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30 for file in $files |
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31 do |
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32 new=`printf "%.${len}d" $i `"_$file" |
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33 echo "$file -> $new" |
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34 mv "$file" "$new" |
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35 let i=i+inc |
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36 done |
