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Tail emulation with named pipes #133

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Tail emulation with named pipes #133

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0d344fe
Used named pipes to resolve sed and tail processes not finishing on Mac
lonsbio Feb 2, 2015
c4428a6
Merge remote-tracking branch 'upstream/master' into tail_named_pipes
lonsbio Mar 14, 2015
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21 changes: 17 additions & 4 deletions bin/bpipe
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Original file line number Diff line number Diff line change
Expand Up @@ -698,16 +698,29 @@ then
tail $LOGFILE | sed "$TAIL_PATTERN"
fi
else
(tail -f $LOGFILE | sed -l "$TAIL_PATTERN") &
#Emulate automatic termination of tail with named pipes
mkfifo .bpipe/logs/${BPIPE_PID}.log_named_pipe

tail -f $LOGFILE >.bpipe/logs/${BPIPE_PID}.log_named_pipe &
TAIL_PID="$!"
#echo "DEBUG: tailing log using MacOSX pid tracking emulation RUNPID=$$, BPIPE_PID=$BPIPE_PID TAILPID=$TAIL_PID"

<.bpipe/logs/${BPIPE_PID}.log_named_pipe sed -l "$TAIL_PATTERN" &
SED_PID="$!"

#echo "DEBUG: tailing log using MacOSX pid tracking emulation RUNPID=$$, BPIPE_PID=$BPIPE_PID TAILPID=$TAIL_PID SED_PID=$SED_PID"

# Wait for the Java Bpipe process to finish naturally (not Ctrl-C, see above for that)
wait $BPIPE_PID

# Seems like The Java Bpipe process ended by itself: kill the background tail process
# started above
# Seems like The Java Bpipe process ended by itself: kill the background tail process
# started above. sed should be killed when it's pipe finishes, so only tail is sent the signal
# wait command used to prevent "$TAIL_PID Terminated: 15 " in output
killtree $TAIL_PID
wait $TAIL_PID 2>/dev/null

#killtree $SED_PID

rm .bpipe/logs/${BPIPE_PID}.log_named_pipe
fi

if [ -e .bpipe/prompt_input_files.${BPIPE_PID} ];
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