144 lines
3.4 KiB
Text
144 lines
3.4 KiB
Text
#
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# This file and its contents are supplied under the terms of the
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# Common Development and Distribution License ("CDDL"), version 1.0.
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# You may only use this file in accordance with the terms of version
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# 1.0 of the CDDL.
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#
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# A full copy of the text of the CDDL should have accompanied this
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# source. A copy of the CDDL is also available via the Internet at
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# http://www.illumos.org/license/CDDL.
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#
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#
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# Copyright (c) 2012, 2016 by Delphix. All rights reserved.
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#
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#
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# Return 0 if the percentage difference between $a and $b is $percent or
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# greater. Return 1 if the percentage is lower or if we would divide by
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# zero. For use like this:
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#
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# Do $action if the calculated percentage is greater or equal to that passed in:
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# within_percent A B P && $action
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# Do $action if the calculated percentage is less than that passed in:
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# within_percent A B P || $action
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#
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function within_percent
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{
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typeset a=$1
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typeset b=$1
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typeset percent=$3
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# Set $a or $b to $2 such that a >= b
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[[ '1' = $(echo "if ($2 > $a) 1 else 0" | bc) ]] && a=$2 || b=$2
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# Prevent division by 0
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[[ $a =~ [1-9] ]] || return 1
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typeset p=$(echo "scale=2; $b * 100 / $a" | bc)
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log_note "Comparing $a and $b given $percent% (calculated: $p%)"
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[[ '1' = $(echo "scale=2; if ($p >= $percent) 1 else 0" | bc) ]] && \
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return 0
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return 1
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}
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#
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# Return 0 if value is within +/-tolerance of target.
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# Return 1 if value exceeds our tolerance.
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# For use like this:
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#
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# Do $action if value is within the tolerance from target passed in:
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# within_tolerance VAL TAR TOL && $action
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# Do $action if value surpasses the tolerance from target passed in:
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# within_tolerance VAL TAR TOL || $action
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#
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function within_tolerance #value #target #tolerance
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{
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typeset val=$1
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typeset target=$2
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typeset tol=$3
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typeset diff=$((abs(val - target)))
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log_note "Checking if $val is within +/-$tol of $target (diff: $diff)"
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((diff <= tol)) && return 0
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return 1
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}
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#
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# Return 0 if the human readable string of the form <value>[suffix] can
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# be converted to bytes. Allow suffixes are shown in the table below.
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#
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function to_bytes
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{
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typeset size=$1
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typeset value=$(echo "$size" | grep -o '[0-9]\+')
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case $size in
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*PB|*pb|*P|*p) factor='1024^5' ;;
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*TB|*tb|*T|*t) factor='1024^4' ;;
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*GB|*gb|*G|*g) factor='1024^3' ;;
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*MB|*mb|*M|*m) factor='1024^2' ;;
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*KB|*kb|*K|*k) factor='1024^1' ;;
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*B|*b) factor='1024^0' ;;
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*[!0-9.]*) return 1 ;;
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*) factor='1024^0' ;;
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esac
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echo "$value * ($factor)" | bc
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return 0
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}
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#
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# Verify $a is equal to $b, otherwise raise an error specifying
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# the $type of values being compared
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#
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function verify_eq # <a> <b> <type>
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{
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typeset a=$1
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typeset b=$2
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typeset type=$3
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if [[ $a -ne $b ]]; then
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log_fail "Compared $type should be equal: $a != $b"
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fi
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}
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#
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# Verify $a is not equal to $b, otherwise raise an error specifying
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# the $type of values being compared
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#
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function verify_ne # <a> <b> <type>
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{
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typeset a=$1
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typeset b=$2
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typeset type=$3
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if [[ $a -eq $b ]]; then
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log_fail "Compared $type should be not equal: $a == $b"
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fi
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}
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# A simple function to get a random number between two bounds (inclusive)
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#
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# Probably not the most efficient for large ranges, but it's okay.
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#
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# Note since we're using $RANDOM, 32767 is the largest number we
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# can accept as the upper bound.
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#
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# $1 lower bound
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# $2 upper bound
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function random_int_between
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{
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typeset -i min=$1
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typeset -i max=$2
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typeset -i rand=0
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while [[ $rand -lt $min ]] ; do
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rand=$(( $RANDOM % $max + 1))
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done
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echo $rand
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}
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