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Top Forums Shell Programming and Scripting Monitor and capture the latest entry from the log file Post 303012224 by Don Cragun on Wednesday 31st of January 2018 09:11:02 PM
Old 01-31-2018
Quote:
Originally Posted by svajhala
Thank you. I am working on bourne shell.

Sorry I am a rookie here. As soon as the value (from the last line of the file) matches the search string, I want to send an email and continue to monitor the log for the next message.

Example:

Search String = AWX_38900
file name=service.log

I want to search for the string 'AWX_38900' in the last line of the file service.log and if it finds a match, it has to send an email to the group of people and continue monitoring the service.log for the next message.
Someone with over 100 posts who has been in the forums for more than seven years doesn't really count as a rookie...

Great. So, take the code I suggested for doing what you're trying to do, replace the echo command with a command to invoke your mail sending utility (with an appropriate subject line, destination address, and a message body including the line you captured.

You still haven't told us what operating system you're using so there's no way we can guess at what mail sending utilities might be available to you. But with over 100 posts to your credit, you should be able to come close to solving any remaining issues on your own. See what you can do and show us where you get stuck if you can't get it to work.
 

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CG(1)																	     CG(1)

NAME
cg - Recursively grep for a pattern and store it. SYNOPSIS
cg [ -l ] | [ [ -i ] pattern [ files ] ] DESCRIPTION
cg does a search though text files (usually source code) recursively for a pattern, storing matches and displaying the output in a human- readable fashion. It is intended to give some of the functionaly of AT&T's cscope(1) tool, with the advantages of simplicity and not being language-specific. The script will colorize output if configured as such. It is typically run with a Perl regular expression to search for. The search can be made case insensitive by using the -i option. A list of files may also be specified with an additional argument after the pattern. Put the files pattern in quotes to make it be matched by Perl rather than by the shell. Running the script with no arguments will recall the results of the previous search. After the search, entries found can be edited using the vg(1) script. The -l option shows the last log made. SOME EXAMPLES
cg - alone recalls the previous search results. cg -i pattern - search the default list of files for all files matching the pattern (and case-insensitively). cg pattern '*.c' - search recursively for pattern in all *.c files. This automatically converts '*' to '.*' and '.' to '.' for you and does a Perl pattern match on all files in the tree. cg pattern *.c - search through the shell-expanded list of *.c files, so not done recursively (in other words, only the files your shell pass to the script as arguments). cg -l - show the last log made. COMMAND-LINE OPTIONS -i Do a case-insensitive search. -l Show the last log made. -p Toggle the default pager option. cg has a bulit-in pager function, which can be enabled or disabled by default (in .cgvgrc). If the default is enabled, this option disables the pager; if the default is disabled, this option enables it. -P Force the built-in pager to be disabled. FILES
${HOME}/.cglast Log file of the last search. ${HOME}/.cgvgrc Per-user configuration file (if the defaults are not desireable). ${HOME}/.cgvg/* Log files in $HOSTNAME.shell_pid form with the log of the last search. SEE ALSO
vg(1), perl(1), find(1), grep(1), cscope(1) AUTHOR
cg was written by Joshua Uziel <uzi@uzix.org>. 13 Mar 2002 CG(1)
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