zonuexe/README.md

## README.md

      
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              README.md
            
          
    rand in SHELL

inspired by rubyとzshを使ってランダム文字列を生成する - Qiita and kyanny/securerandom-cli · GitHub
requirement


Bourne shell like shells ( sh, bash, zsh )
Ruby version 1.9+

How to use

rand          ; => 85800d9d5b (default 10 charactors)
rand 10       ; => f5794c8d18373d6 (your ordered string length)
rand hex 10   ; => d849dc6de1953eab647a (your ordered algorithm)
rand uuid     ; => e5c9aaf9-2484-47ad-a419-61860cb1157a (UUID)
rand u        ; => 663704fb-d0ce-446a-8320-68c9c009c078 (be able abbreviated, means uuid)
rand n 100000 ; => 73889 (put a integer number, range 1 <= n < arg)
rand f        ; => 0.822746453691208 (put a floating-point number, range 0 <= n < 1)


## ruby-random.sh
rand () {
    a=$1
    b=$2
    type=random_string
    len=10
    post="cat -"
    chop="sed -e s/.$//g"
    case `echo $a | tr '[:upper:]' '[:lower:]'` in
        "")  a=$type; b=$len ;;
        ba*) a=base64        ;;
        f*)  a=random_float  ;;
        h*)  a=hex           ;;
        b*)  a=random_bytes  ;;
        u*)  a=uuid          ;;
        s*)  a=random_string ;;
        n*)  a=random_number ;;
    esac
    if test "$a" = uuid
        then type=uuid; len=''
    elif test "$a" = random_float
        then type=random_number; len=0
    elif test "$a" = random_string -o "$b" = ""
    then
        type=hex
        test ! "$b" && l=$a
        if test "$b" -gt 0 2>/dev/null
            then l=$b
        fi
        len=`expr $l / 2`
        mod=`expr $l % 2`
        if test "$l" = 1
            then post="$chop"; len=1
        elif test $mod = 1
        then post="$chop"; len=`expr $len + 1`
        fi
    elif test "$a" -a "$b"
        then type=$a; len=$b
    elif test "$a"
        then len=$a
    fi
    ruby -rsecurerandom -e "puts SecureRandom.${type} ${len}" | eval $post
}
	rand () {
	a=$1
	b=$2
	type=random_string
	len=10
	post="cat -"
	chop="sed -e s/.$//g"
	case `echo $a \| tr '[:upper:]' '[:lower:]'` in
	"") a=$type; b=$len ;;
	ba*) a=base64 ;;
	f*) a=random_float ;;
	h*) a=hex ;;
	b*) a=random_bytes ;;
	u*) a=uuid ;;
	s*) a=random_string ;;
	n*) a=random_number ;;
	esac
	if test "$a" = uuid
	then type=uuid; len=''
	elif test "$a" = random_float
	then type=random_number; len=0
	elif test "$a" = random_string -o "$b" = ""
	then
	type=hex
	test ! "$b" && l=$a
	if test "$b" -gt 0 2>/dev/null
	then l=$b
	fi
	len=`expr $l / 2`
	mod=`expr $l % 2`
	if test "$l" = 1
	then post="$chop"; len=1
	elif test $mod = 1
	then post="$chop"; len=`expr $len + 1`
	fi
	elif test "$a" -a "$b"
	then type=$a; len=$b
	elif test "$a"
	then len=$a
	fi
	ruby -rsecurerandom -e "puts SecureRandom.${type} ${len}" \| eval $post
	}