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|
#! /bin/sh
#!buildShellBin path=coreutils
#
# NAME
# genpasswd - generate a password
#
# SYNOPSIS
# genpasswd [OPTION]...
#
# DESCRIPTION
# Produce a random string of a given length and alphabet to standard
# output.
#
# --length=number (default: 71)
# Specify the number of bytes to produce.
#
# --alphabet=string (default: -+.,=/A-Za-z0-9_)
# Specify the list of characters that can be produced.
# The string gets interpreted by tr and may contain single-character
# collating elements. See tr(1) for details.
#
# --newline=bool (default: true)
# Specify whether a newline should be appended to the output.
#
set -efu
alphabet=-+.,=/A-Za-z0-9_
length=71
newline=true
while test $# -gt 0; do
case $1 in
--alphabet=*)
alphabet=${1//--alphabet=}
shift
;;
--length=*)
length=${1//--length=}
shift
;;
--newline=true|--newline=false)
newline=${1//--newline=}
shift
;;
*)
echo "$0: bad argument: $1" >&2
exit 1
esac
done
tr -dc -- "$alphabet" < /dev/urandom | dd status=none bs="$length" count=1
case $newline in true)
echo
esac
|
