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Darrick J. Wong
07094a9652
awk doesn't have a particularly good random number generator -- it seeds from the Unix epoch time in seconds, which means that the run order across a bunch of VMs started at exactly the same time are unsettlingly predictable. Therefore, at least try to seed it with bash's $RANDOM, which is slightly less predictable. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
29 lines
438 B
Awk
29 lines
438 B
Awk
# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2005 Silicon Graphics, Inc. All Rights Reserved.
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#
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# randomize stdin.
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function randomize(array, N) {
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for(i = 0; i < N; i++) {
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j = int(rand()*N)
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if ( i != j) {
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tmp = array[i]
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array[i] = array[j]
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array[j] = tmp
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}
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}
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return
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}
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BEGIN {
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srand(seed)
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}
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{
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array[NR - 1] = $0
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}
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END {
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randomize(array, NR)
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for (i = 0; i < NR; i++) printf("%s ", array[i])
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}
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