Displays the names of all files in the specified directory with the specified type. If you do not specify any type it defaults to text files.

kind [-a] [-d] [-t] [-x] [file...]

#!/bin/bash
#
# @(#) kind v1.0   Prints files of the same kind
#
 
if [ $# -gt 0 ]
then if [ `echo $1 | cut -c1` = "-" ]
  then case #1 in
    -a)   KIND='archive'
          shift;;
    -d)   KIND='data'
          shift;;
    -t)   KIND='text'
          shift;;
    -x)   KIND='executable'
          shift;;
     *)   echo "kind: arg error"                           >&2
          echo "usage: kind [-a] [-d] [-t] [-x] [file...]" >&2
          echo "       -a  archive"                        >&2
          echo "       -d  data"                           >&2
          echo "       -t  text, default"                  >&2
          echo "       -x  executable"                     >&2
          echo "       if no args, reads stdin"            >&2
          exit 1;;
    esac
    fi
  fi
 
: ${KIND:='text'}
 
case $# in
  0)   while read FILE
       do
           file $FILE | fgrep $KIND | cut -d: -f1
       done;;
  *)   file $@ | fgrep $KIND | cut -d: -f1;;
esac

FILE contains the file names as they are read from stdin (Standard input). KIND contains the text string that defines the type of file.

Display all text files in the directory /etc.

more `kind /etc/*`

kind -d /etc/*

Possible Result

/etc/mnttab
/etc/utmp
/etc/wtmp