passcreate

#!/bin/bash

##################
#                #
# © 2015 kPherox #
#                #
##################

CMDNAME=`basename $0`
CAT="cat /dev/urandom"
FLG_c=false
FLG_o=false
FLG_l=false
FLG_n=false
FLG_f=false
FLG_h=false
FLG_err=false

usage () {
  cat <<__USAGE__
Usage:
  $CMDNAME [-c <characters>]
  $CMDNAME [-o <characters>]
  $CMDNAME [-c <characters>] [-l <length>] [-n <getnum>] [-f <filename>]
__USAGE__
  return 0
}

help () {
  cat <<__HELP__
Options:
  -c    Characters.
  -o    Custom Characters.
  -l    Password length.
  -n    Get password num.
  -f    Output to file.
  -h    Display this.
__HELP__
  return 0
}

while getopts c:o:l:n:f:h OPT
do
  case $OPT in
    "c" )
      FLG_c=true
      WTYPE="$OPTARG"
    ;;
    "o" )
      FLG_o=true
      CTYPE="$OPTARG"
    ;;
    "l" )
      FLG_l=true
      WSIZE="$OPTARG"
    ;;
    "n" )
      FLG_n=true
      NLINE="$OPTARG"
    ;;
    "f" )
      FLG_f=true
      FILE="$OPTARG"
    ;;
    "h" )
      FLG_h=true
    ;;
    * )
      FLG_err=true
    ;;
  esac
done

shift $(($OPTIND - 1))

if $FLG_h || $FLG_err; then
  usage
  help
  return 2>&- || exit 1
fi

if ! $FLG_c && ! $FLG_o; then
  usage
  return 2>&- || exit 1
fi

case ${WTYPE} in
  "alnum" | "alpha" | "blank" | "cntrl" | "digit" | "lower" | "print" | "punct" | "space" | "upper" | "xdigit" )
    WTYPE="[:${WTYPE}:]"
  ;;
  "CHAR" )
    WTYPE="[=CHAR=]"
  ;;
  * )
    if $FLG_o; then
      WTYPE="$CTYPE"
    else
      usage
      cat <<__OPTION__
"characters" list
alnum		all letters and digits
alpha		all letters
blank		all horizontal whitespace
cntrl		all control characters
digit		all digits
graph		all printable characters, not including space
lower		all lower case letters
print		all printable characters, including space
punct		all punctuation characters
space		all horizontal or vertical whitespace
upper		all upper case letters
xdigit		all hexadecimal digits
CHAR		all characters which are equivalent to CHAR
__OPTION__
      return 2>&- || exit 1
    fi
  ;;
esac

LC_CTYPE=C
TYPE="tr -dc ${WTYPE}"

if ! $FLG_l; then
  WSIZE=8
fi
if ! $FLG_n; then
  NLINE=3
fi

SIZE="fold -w ${WSIZE}"
LINE="head -n ${NLINE}"

CMD=`${CAT} | ${TYPE} | ${SIZE} | ${LINE}`

if $FLG_f; then
  echo "Now Creating..."
  echo ${CMD} >> ${FILE}
  sleep 1s
  echo "Finish!"
else
  echo "Now Creating..."
  sleep 2s
  echo ${CMD}
  sleep 0.5s
  echo "Finish!"
fi

return 2>&- || exit 0