Shell Programming and Scripting

I have a history file that recieves all sorts of messages 24 hours a day. I have a script that retreives various messages in the history file. There is an one multi line output that is sent to the history file that comes in every 15 minutes. How do I cgrep for the most recent 15 minute output in the history file? If a timestamp is needed, here is the format: 07:46:03

try this

grep "[0-2][0-4]:[0-5][0-9]:[0-5][0-9]" filename

Ex:

qsaskot on eeiatuc930> cat jjj
sdferrhvnerv
sfsd2007-12-01 12:08:45dfdfd
asdhasjkhasfhshfasdhfasjkhfasjkldhfj
asdfasdf
2003-09-31 23:59:50dfdfdfdf
sdfsf
fgfgfgf2001-01-31 00:00:00
dfjsdfasdhfahhl;ajsdfhjh

qsaskot on eeiatuc930> grep "[0-2][0-4]:[0-5][0-9]:[0-5][0-9]" jjj
sfsd2007-12-01 12:08:45dfdfd
2003-09-31 23:59:50dfdfdfdf
fgfgfgf2001-01-31 00:00:00

can you show the history file?

Here you go, this is what dat continuous data being dumped into the file looks like: I am trying to cgrep the most recent OP:TGCNT message.


S570-65592 06-10-06 10:31:01 474383 TRFM lansing2
OP TRFC30 HSLS
TIME 10:29:35

SECTION 202: HIGH SPEED LINK SET MEASUREMENTS

SM SET MSGSTRAN MSGSRCVD MOCTTRAN MOCTRCVD SDPDUTRN
1 8 540025 505720 25230816 26527017 539089

SM SET SDPDURTR SDPDURCV SDOCTTRN SDOCTRTR SDOCTRCV
1 8 0 504951 27864628 0 29065792

SM SET PDUSTRAN PDUSRCVD PDUOCTTR PDUOCTRC
1 8 611015 576877 28583752 29785188

S4C0-96731290 06-10-06 10:31:03 474384 MAIPR lansing2
M OP:TGCNT,PRINT; PF

S570-65592 06-10-06 10:31:04 474385 CP lansing2
M OP TGCNT LIST SEGMENT=1 STARTED
TG=1936 SZ=269 OOS=1
TG=1938 SZ=264 OOS=1
S570-65592 06-10-06 10:31:07 474386 CP lansing2
M OP TGCNT LIST CONTAINED 1 SEGMENTS COMPLETED

S570-65592 06-10-06 10:31:11 474387 TRFM lansing2
OP TRFC30 SLS
TIME 10:29:35

SECTION 203: SIGNALING LINK SET MEASUREMENTS

you may try something like this

Code:

hour=`date +%H`
minute=`date +%M`
tot_min=$(( hour * 60 + minute ))
time=15
min_diff=$(( tot_min - time ))
hr=$(( min_diff / 60 ))
min=$(( min_diff % 60 ))

sed -n "/${hr}:${min}:[0-9][0-9]/,$ p" file

since you only want the most recent, why not tail the file for an amount, say tail -50 file, then from that output, get the last entry? if not, tail a bigger number and do the same.. will it work?