GNU nano 2.5.3                                                      File: chercheText.sh

#!/bin/bash
function chercherText {
        local code=1
        for file in $(find $1 -type f -mtime -7 2> /dev/null); do
                if file $file | grep -q "text"; then
                        echo $file
                        code=0
                fi
        done
        return $code
}

fout="/dev/stdout"
while getopts "hf" option; do
        case $option in
                h)
                        echo "Usage : chercheText.sh [-h] [-f] [rep [...]]" >> $fout
                        exit 2
                        ;;
                f)
                        fout=chercherText.$(date +"%d_%m_%Y")
                        rm $fout 2> /dev/null
                        touch $fout
                        ;;
                *)
                        echo "Options invalides" > /dev/stderr
                        echo $usage > /dev/stderr
                        exit 1
                        ;;
        esac
done

shift $(($OPTIND -1))
code=1
case $# in
        0)
                chercherText '.'
                exit $?
                ;;
        1)
                if [ -d $1 ]; then
                        chercherText $1
                        exit $?
                else
                        echo "$1 n'est pas un repertoire" > /dev/stderr
                        exit 2
                fi
                ;;
        *)
                for file in $*; do
                        if [ -d $file ]; then
                                echo "Repertoire : $file" >> $fout
                                chercherText $file
                                code=$?
                        else
                                echo "$file n'est pas un repertoire" > /dev/stderr
                        fi
                done
                ;;
esac
exit code