Frank wrote:
>> The real reason seems to be (... is), that a proper match seems
>> to kill the pipe early with exitcode 141
Placing the X= setting inside the key line in the code, we see it says:
if echo "$( cat "${TMPOUT}" 2>/dev/null ) | grep -q "^${V}$"; then
Looking at the grep(1) man page entry for its "-q" option, we see it says:
-q, --quiet, --silent
Quiet; do not write anything to standard output. Exit immediately
with zero status if any if any match is found, even if an error was
detected. Also see the -s or --no-messages option.
So we have an "if" statement testing the exit value of a pipe of 'echo' to
'grep'
where the 'grep' will exit early, if it finds a match early. As a secondary
matter of efficiency, we also have the contents of TMPOUT filling the value
of shell's formulation of the argument to be passed to echo'd into a pipe,
instead of directly grep'ing in TMPOUT.
If for some reason I don't see off hand, you prefer to remain with this
inefficient
"echo contents_of_TMPOUT | grep ..." construct, I'd suggest using "grep -c"
instead of "grep -q", then checking for a positive count, thus forcing the
entire
contents of TMPOUT to be read and echo'd, before the grep decides it can
exit early and break the pipe:
if [[ $(echo "$( cat "${TMPOUT}" 2>/dev/null ) | grep -c "^${V}$") -gt 0 ]];
then
Or, more efficiently, just "grep -q" directly in TMPOUT and skip the echo and
pipe entirely:
if grep -q "^${V}$" "${TMPOUT}"; then
--
Paul Jackson
[email protected]
