GameShell/scripts/random_string at master · mgloc/GameShell

executable file

16 lines (14 loc) · 520 Bytes

#!/usr/bin/env sh

GSH_ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"

GSH_CONFIG=$GSH_ROOT/.config

n=$1

awk -v n=${n:-32} -v seed_file="$GSH_CONFIG/PRNG_seed" -v PID=$$ 'BEGIN {

getline seed < seed_file;

if (seed) srand(seed); else srand();

l = split("A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z", chars);

for(i=0;i<n;i++) {

printf("%c", chars[1+int(rand()*l)]);

}

printf("\n");

if (seed) printf("%d\n", int(2^30 * rand())+PID) > seed_file;

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