Shell Programming and Scripting

#! /usr/bin/ksh

inpu=$1
 [ -d "$inpu" ] && echo "directory"
 [ -f "$inpu" ] && echo "file"

./test "/tmp"
directory

str="/tmp/abc"
if [ -f $str ]
then
  echo $str is a file
elif [ -d $str ]
then
  echo $str is a directory
else
  echo $str is neither a file nor directory
fi

#!/bin/bash
if [ -e $1 ] ; then
    if [ -f $1 ] ; then
        echo $1 is a file
    elif [ -d $1 ] ; then
        echo $1 is a directory
    else
        echo $1 exists but is neither a normal file nor a directory
    fi
fi


skrynesaver@busybox ~/tmp$ ./test.sh /etc/passwd
/etc/passwd is a file
skrynesaver@busybox ~/tmp$ ./test.sh /tmp
/tmp is a directory
skrynesaver@busybox ~/tmp$ ./test.sh /dev/sda
/dev/sda exists but is neither a normal file nor a directory
skrynesaver@busybox ~/tmp$

ksh
chk(){
[[ $2 -eq 0 ]] && echo "$1 valid" || echo "$1 not valid"
}

[[ -d /tmp ]] && return 0 || return 1
chk "dir" "$?"

[[ -f /tmp/file.txt ]] && return 0 || return 1
chk "file" "$?"

 
a="/tmp"
b="tmp/file.txt"
 
 [ -f $a ] && echo "File" || ([ -d $a ] && echo "Directory")
 [ -f $b ] && echo "File" || ([ -d $b ] && echo "Directory")