7290 ZFS test suite needs to control what utilities it can run
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

*** 8,18 ****
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright (c) 2012 by Delphix. All rights reserved.
  #
  
  #
  # Return 0 if the percentage difference between $a and $b is $percent or
  # greater. Return 1 if the percentage is lower or if we would divide by
--- 8,18 ----
  # source.  A copy of the CDDL is also available via the Internet at
  # http://www.illumos.org/license/CDDL.
  #
  
  #
! # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
  #
  
  #
  # Return 0 if the percentage difference between $a and $b is $percent or
  # greater. Return 1 if the percentage is lower or if we would divide by
*** 28,43 ****
          typeset a=$1
          typeset b=$1
          typeset percent=$3
  
          # Set $a or $b to $2 such that a >= b
!         [[ '1' = $($ECHO "if ($2 > $a) 1" | $BC) ]] && a=$2 || b=$2
  
          # Prevent division by 0
          [[ $a =~ [1-9] ]] || return 1
  
!         typeset p=$($ECHO "scale=2; $b * 100 / $a" | $BC)
          log_note "Comparing $a and $b given $percent% (calculated: $p%)"
!         [[ '1' = $($ECHO "scale=2; if ($p >= $percent) 1" | $BC) ]] && return 0
  
          return 1
  }
--- 28,43 ----
          typeset a=$1
          typeset b=$1
          typeset percent=$3
  
          # Set $a or $b to $2 such that a >= b
!         [[ '1' = $(echo "if ($2 > $a) 1" | bc) ]] && a=$2 || b=$2
  
          # Prevent division by 0
          [[ $a =~ [1-9] ]] || return 1
  
!         typeset p=$(echo "scale=2; $b * 100 / $a" | bc)
          log_note "Comparing $a and $b given $percent% (calculated: $p%)"
!         [[ '1' = $(echo "scale=2; if ($p >= $percent) 1" | bc) ]] && return 0
  
          return 1
  }