I want to extract relevant data of a traffic junction and it's connections from a log file. Example log:
SCN DD1251 At Glasgow Road - Kilbowie Road Modified By ________ Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1271 C DD1271 R DD1351 D DD1351 B E Stage Suffix for Offset Optimizer 1 Double Cycle Initially ? N Force Single / Double Cycling status ? N Double Cycle Group 00 Double Cycle Ignore ? N Allow Link Max Saturation N Link Max Sat Override N Stages 1 2 3 4 Fixed N N N Y LRT stage N N N N Skip allowed N N N N Ped stage N N N N Ped invite N N N N Ghost stage N N N N Offset authority pointer 0 Split authority pointer 0 Offset opt emiss weight 000 I/green feedback inhibit N Bus Authority 00 ACIS node 00000 Bus Mode - Central extensions N Local extensions N Recalls N Stage skipping N Stage truncation N Cancels N Bus Priority Selection - Multiple buses N Queue Calculation N Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N Bus recall recovery type 0 Bus extension recovery type 0 Offset Bus authority pointer 0 Split Bus authority pointer 0 Bus skip recovery 0 Skip importance factor 0 Bus priority status OFF LRT sat 1 000 LRT sat 2 000 LRT sat 3 000 PEDESTRIAN FACILITIES Ped Node N Num Ped Wait Imp Factor 000 Ped Priority 0 Max Ped Priority Freq 00 Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000 Max Ped Wait Time 000 PEDESTRIAN VARIABLE INVITATION TO CROSS Allow Ped Invite N Ped Priority Auto 000 Ped Invite Upper Sat 000 Prio Level 1 2 3 4 Max Ped Priority Smoothed Time 000 000 000 000 Max Ped Priority Increase Length 00 00 00 00 CYCLE TIME FACILITIES Allow Node Independence N Operator Node Independence 0 Ghost Demand Stage N Num Ghost Assessment Cycles 15 Upper Trigger Ghost 04 Lower Trigger Ghost 0 SCN DD1271 At Glasgow Road - Hume Street Modified 13-OCT-15 15:06 By BDAVIDSON Type CR Region WS Subregion UPSTREAM DOWNSTREAM FILTER NODE LINK NODE LINK LINK DD1301 T DD1301 A DD1251 R DD1251 C Stage Suffix for Offset Optimizer 1 Double Cycle Initially ? N Force Single / Double Cycling status ? N Double Cycle Group 00 Double Cycle Ignore ? N Allow Link Max Saturation N Link Max Sat Override N Stages 1 2 3 Fixed N Y Y LRT stage N N N Skip allowed N N N Ped stage N N N Ped invite N N N Ghost stage N N N Offset authority pointer 0 Split authority pointer 0 Offset opt emiss weight 000 I/green feedback inhibit N Bus Authority 00 ACIS node 00000 Bus Mode - Central extensions N Local extensions N Recalls N Stage skipping N Stage truncation N Cancels N Bus Priority Selection - Multiple buses N Queue Calculation N Hold recall if faulty N Disable recall N Disable long jtim N Real Cancel N Bus recall recovery type 0 Bus extension recovery type 0 Offset Bus authority pointer 0 Split Bus authority pointer 0 Bus skip recovery 0 Skip importance factor 0 Bus priority status OFF LRT sat 1 000 LRT sat 2 000 LRT sat 3 000 PEDESTRIAN FACILITIES Ped Node N Num Ped Wait Imp Factor 000 Ped Priority 0 Max Ped Priority Freq 00 Ped Lower Sat Threshold 000 Ped Upper Sat Threshold 000 Max Ped Wait Time 000 PEDESTRIAN VARIABLE INVITATION TO CROSS Allow Ped Invite N Ped Priority Auto 000 Ped Invite Upper Sat 000 Prio Level 1 2 3 4 Max Ped Priority Smoothed Time 000 000 000 000 Max Ped Priority Increase Length 00 00 00 00 CYCLE TIME FACILITIES Allow Node Independence N Operator Node Independence 0 Ghost Demand Stage N Num Ghost Assessment Cycles 15 Upper Trigger Ghost 04 Lower Trigger Ghost 0 I can already extract the first relevant line using the following Bash script:
grep SCN* LOG.TXT > JUNCTIONS.txt Which creates a list of all the junctions like so:
SCN DD1251 At Glasgow Road - Kilbowie Road SCN DD1271 At Glasgow Road - Hume Street SCN DD1301 At Glasgow Road - Argyll Road - Cart Street SCN DD1351 At Kilbowie Road - Chalmers Street ... However, I want to extract the lines immediately after each link title, down to the final link of the node just before a large amount of whitespace and without capturing anything from Stage Suffix onwards until the next link.
Is there a way to modify my BASH script to include an additional number of lines after each matching instance it finds?
