Optimize multiple awk variable assignment

Shell Programming and Scripting
1

how can i optimize the following:

TOTALRESULT="total1=4
total2=9
total3=89
TMEMORY=1999"

        TOTAL1=$(echo "${TOTALRESULT}" | egrep "total1=" | awk -F"=" '{print $NF}')
        TOTAL2=$(echo "${TOTALRESULT}" | egrep "total2=" | awk -F"=" '{print $NF}')
        TOTAL3=$(echo "${TOTALRESULT}" | egrep "total3=" | awk -F"=" '{print $NF}')
        TMEMORY=$(echo "${TOTALRESULT}" | egrep "tmemory=" | awk -F"=" '{print $NF}')

i would like to, if possible, avoid the multiple egrep and multiple awk.

2 
typeset -u TOTALRESULT

TOTALRESULT="total1=4
total2=9
total3=89
TMEMORY=1999"

eval "$TOTALRESULT"
1 Like
3

Note that typeset -u (values are uppercase) is ksh.
eval can be evil. A bit more careful is

eval $(
echo "$TOTALRESULT" | awk '/^[[:alnum:]_]+=[[:print:]]*$/'
)
1 Like
4

You could also consider:

#!/bin/ksh
IAm=${##*/}
TmpFile="$IAm".$$

trap 'rm -f "$TmpFile"' EXIT

TOTALRESULT="total1=4
total2=9
total3=89
string=abc=def
TMEMORY=1999"

awk '
BEGIN {	FS = OFS = "="
}
{	$1 = toupper($1)
}1' <<EOF > "$TmpFile"
$TOTALRESULT
EOF

. "$TmpFile"

printf '%s is set to %s\n' \
	TOTAL1 "$TOTAL1" \
	TOTAL2 "$TOTAL2" \
	TOTAL3 "$TOTAL3" \
	TMEMORY "$TMEMORY" \
	STRING "$STRING"

which produces the output:

TOTAL1 is set to 4
TOTAL2 is set to 9
TOTAL3 is set to 89
TMEMORY is set to 1999
STRING is set to abc=def

Although written and tested using a 1993+ version of the Korn shell, this script should work with any POSIX-conforming shell.

5

In my bash 4, this seems to work:

. <(echo "${TOTALRESULT^^}")
echo $TOTAL1, $TMEMORY 
4, 1999
1 Like