Re: Show us your /etc/profile

[Martijn van Duren]

Here's some potential useful feature from my .profile. It might not be 
perfect, but at least it's better then some of the generators I've seen 
in production.

# $RANDOM is not portable and in ksh it's limited to 32767.
rand() {
        local number
        local rdevice
        for rdevice in /dev/{u,}random fail; do
                test -c $rdevice -a -r $rdevice && break
        done
        test $rdevice = "fail" && return 1
        
        number=$(dd if=$rdevice bs=4 count=1 2>/dev/null | hexdump -e '/4 
"%u\n"')
        if [ -z "$1" ]; then
                echo $number
        else
                echo $(($number % $(($1 + 1))))
        fi
}

# http://xkcd.com/936/
generatepw_file() {
        local file=${1:-/usr/share/dict/words}
        local lineno=`wc -l < $file` || return 1
        local i=0
        local passphrase
        local random

        if [ $lineno -lt 75000 ]; then
                echo "Not enough words in $file" >&2
                return 1
        fi

        while [ $i -lt 4 ]; do
                random=$(rand $lineno) || return 1
                passphrase="${passphrase}$(sed -n "$random p" $file)"
                i=$((i+1));
        done

        echo $passphrase
}

generatepw_random() {
	local 
characters='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()-_=+[]{}:,.<>/?\|'
        local charactercount=$(echo -n $characters | wc -c)
        local password=''
# Password should be somewhere between 10 and 20 characters
        local passwordlength=$((`rand 10` + 10))
        local i=0
        local random

        while [ $i -lt $passwordlength ]; do
                random=$(rand ${charactercount}) || return 1
		password=${password}$(echo $characters | sed -n 
"s/^.\{${random}\}\(.\).*/\1/p")
                i=$((i+1))
        done
        echo $password
}

generatepw() {
        if [ `rand 1` = 1 ]; then
                generatepw_file || generatepw_random || return 1
        else
                generatepw_random || return 1
        fi
}

On 08/28/15 02:36, T B wrote:
Resurrecting this not-too-old thread.  You might find this one useful if
you run CARP firewalls which gives you a dynamic prompt telling you the
master/backup/other status.

function fwStatus {
         IFCONFIG=`ifconfig -a | grep carp:`
         NUMCARPS=`echo "$IFCONFIG" | wc -l`
         BACKUPCARPS=`echo "$IFCONFIG" | grep 'carp: BACKUP' | wc -l`
         MASTERCARPS=`echo "$IFCONFIG" | grep 'carp: MASTER' | wc -l`

         if [[ "$MASTERCARPS" == "$NUMCARPS" ]]; then
                 printf master
         elif [[ "$BACKUPCARPS" == "$NUMCARPS" ]]; then
                 printf backup
         else
                 printf other
         fi
}

HOSTNAME=`hostname -s`
PS1='${USER}@${HOSTNAME}:${PWD} ($(fwStatus)) $ '