| 1 | ## oils_failures_allowed: 0
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| 2 | ## compare_shells: bash mksh zsh ash
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| 3 |
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| 4 | #### $RANDOM produces random numbers
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| 5 | [[ -n $RANDOM ]] && echo set
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| 6 |
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| 7 | a=$RANDOM
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| 8 | b=$RANDOM
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| 9 | [[ $a -ne $b ]] && echo random
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| 10 |
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| 11 | ## STDOUT:
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| 12 | set
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| 13 | random
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| 14 | ## END
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| 15 |
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| 16 | #### RANDOM=seed seeds a sequence of random numbers
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| 17 |
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| 18 | # mksh doesn't implement seeding
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| 19 | case $SH in mksh) exit 0 ;; esac
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| 20 |
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| 21 | $SH -c 'RANDOM=seed; echo $RANDOM $RANDOM' > one.txt
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| 22 | $SH -c 'RANDOM=seed; echo $RANDOM $RANDOM' > two.txt
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| 23 | diff -u one.txt two.txt
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| 24 | echo diff=$?
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| 25 |
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| 26 | ## STDOUT:
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| 27 | diff=0
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| 28 | ## END
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| 29 | ## BUG mksh STDOUT:
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| 30 | ## END
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| 31 |
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| 32 | #### unset RANDOM resets its special function
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| 33 |
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| 34 | unset RANDOM
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| 35 | [[ -z $RANDOM ]] && echo empty
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| 36 |
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| 37 | ## STDOUT:
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| 38 | empty
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| 39 | ## END
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