Things like var=value do not produce output that can be piped. One can
say that the construct a=2|something is a syntax error, as opposed to
a=2 something which is valid. {} do not produce a new scope, they only
group instructions. Imho writing:
a=1; { a=2; echo $a; }; echo $a
is more correct than:
a=1; { a=2|cat; }; echo $a
If you need the exit status and a result you can use:
cmd="echo -e"
result="`$cmd $args`"; status=$?
[ $status ] && [ $LOG_ERRORS ] \
"Argh: $?: $cmd($args): (result='$result')"|logger ...
[ $status -eq 0 ] && [ $LOG_SUCCESS ] \
"Yeah: $cmd($args): (result='$result')"|logger ...
If you need namespace isolation use a=1; (a=13; echo $a); echo $a
Peter
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