Ответ... не совсем понял, работает он или нет...

Вадим Мальцев 17.08.2007 11:02 / 17.08.2007 11:07

# rand - create large random number using /dev/urandom                                                                                                
# usage: rand [maxvalue]                                                                                                                             
#                                                                                                                                                       
# RandomDevice=/dev/urandom                                                                                                                             
# MaxRand=18446744073709551616    # 2^64                                                                                                               
#                                                                                                                                                       
# [ $# -lt 1 ] && set -- $MaxRand                                                                                                                       
#                                                                                                                                                       
# # Read 8 (binary) bytes, convert them to 8 upper-case hex                                                                                             
# # numbers using "od", remove whitespace:                                                                                                              
#                                                                                                                                                       
# hex=`dd if=/dev/urandom bs=1 count=8 2>/dev/null |                                                                                                    
> od -tx1 | head -1 | cut -d' ' -f2- |                                                                                                                  
> tr -d ' ' | tr '[a-f]' '[A-F]'`                                                                                                                       
echo "$dec % $1 + 1" | bc  
#                                                                                                                                                       
# # convert from hexadecimal to decimal:                                                                                                                
# dec=`echo "ibase=16; $hex" | bc`                                                                                                                      
-bash: bc: command not found
# #echo >&2 "DEBUG: hex=<$hex>; dec=<$dec>"                                                                             #                                                                                                                                                       
# echo "$dec % $1 + 1" | bc  
-bash: bc: command not found