07-12-2006
Extracting Logfile Entries
Hello All,
I am trying to write a KSH script that would extract lines from a logfile, within a certain timeframe, in reverse order.
Ex.
-Sample logfile-
INFO 2006-07-12 00:23:00 - ModeDecision Time in WF:27
INFO 2006-07-12 00:24:00 - NRT_MQ_RES:108
INFO 2006-07-12 00:25:00 - getRecords() :R4000 :37
INFO 2006-07-12 00:26:00 - ModeDecision Time in WF:43
INFO 2006-07-12 00:27:00 - JDBC [PADRECORD] : 5
From the sample logfile above, I am needing to extract the lines starting from '00:27:00' to three minutes prior (00:24:00). I could not find anything from the 'date' command that would reverse time.
Any help would be greatly appreciated!
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LEARN ABOUT X11R4
logsave
LOGSAVE(8) System Manager's Manual LOGSAVE(8)
NAME
logsave - save the output of a command in a logfile
SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ]
DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s), and save a copy of its output to logfile. If the containing
directory for logfile does not exist, logsave will accumulate the output in memory until it can be written out. A copy of the output will
also be written to standard output.
If cmd_prog is a single hyphen ('-'), then instead of executing a program, logsave will take its input from standard input and save it in
logfile
logsave is useful for saving the output of initial boot scripts until the /var partition is mounted, so the output can be written to
/var/log.
OPTIONS
-a This option will cause the output to be appended to logfile, instead of replacing its current contents.
-s This option will cause logsave to skip writing to the log file text which is bracketed with a control-A (ASCII 001 or Start of
Header) and control-B (ASCII 002 or Start of Text). This allows progress bar information to be visible to the user on the console,
while not being written to the log file.
-v This option will make logsave to be more verbose in its output to the user.
AUTHOR
Theodore Ts'o (tytso@mit.edu)
SEE ALSO
fsck(8)
E2fsprogs version 1.44.1 March 2018 LOGSAVE(8)