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Check for GNU dd (→ FreeBSD)

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This commit is contained in:
Nils Steinger 2017-05-28 10:48:50 +02:00
parent 5a40c0eaf7
commit b02244c14b
1 changed files with 32 additions and 9 deletions
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41
nench.sh
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@ -95,6 +95,24 @@ then
exit 1
fi
if command_exists gdd
then
gnu_dd='gdd'
elif command_exists dd
then
gnu_dd='dd'
else
printf '%s\n' 'This script requires dd, but it could not be found.' 1>&2
exit 1
fi
if ! "$gnu_dd" --version > /dev/null 2>&1
then
printf '%s\n' 'It seems your system only has a non-GNU version of dd.'
printf '%s\n' 'dd write tests disabled.'
gnu_dd=''
fi
printf '%s\n' '-------------------------------------------------'
printf ' nench.sh v2017.05.08 -- https://git.io/nench.sh\n'
date -u '+ benchmark timestamp: %F %T UTC'
@ -157,18 +175,23 @@ printf '\n'
# dd disk test
printf 'dd test\n'
io1=$( dd_benchmark )
printf ' 1st run: %s\n' "$(printf '%d\n' "$io1" | Bps_to_MiBps)"
if [ -z "$gnu_dd" ]
then
printf ' %s\n' '[disabled due to missing GNU dd]'
else
io1=$( dd_benchmark )
printf ' 1st run: %s\n' "$(printf '%d\n' "$io1" | Bps_to_MiBps)"
io2=$( dd_benchmark )
printf ' 2nd run: %s\n' "$(printf '%d\n' "$io2" | Bps_to_MiBps)"
io2=$( dd_benchmark )
printf ' 2nd run: %s\n' "$(printf '%d\n' "$io2" | Bps_to_MiBps)"
io3=$( dd_benchmark )
printf ' 3rd run: %s\n' "$(printf '%d\n' "$io3" | Bps_to_MiBps)"
io3=$( dd_benchmark )
printf ' 3rd run: %s\n' "$(printf '%d\n' "$io3" | Bps_to_MiBps)"
# Calculating avg I/O (better approach with awk for non int values)
ioavg=$( awk 'BEGIN{print int(('"$io1"' + '"$io2"' + '"$io3"')/3)}' )
printf ' average: %s\n' "$(printf '%d\n' "$ioavg" | Bps_to_MiBps)"
# Calculating avg I/O (better approach with awk for non int values)
ioavg=$( awk 'BEGIN{print int(('"$io1"' + '"$io2"' + '"$io3"')/3)}' )
printf ' average: %s\n' "$(printf '%d\n' "$ioavg" | Bps_to_MiBps)"
fi
printf '\n'