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Full Discussion: Help on grep syntax in UNIX
Top Forums Shell Programming and Scripting Help on grep syntax in UNIX Post 303008225 by RudiC on Wednesday 29th of November 2017 05:33:46 AM
Old 11-29-2017
With a looong pipe like that, you could certainly add a tr '\n' ',' to achieve what you need. On the other hand, as you deploy awk anyhow, why not do ALL of it in one awk script?
AND, why use the -ltr options to ls when you need the file name only?

The two greps for "log" and "session" are somewhat redundant, as "log" HAS to be in the file names due to the pattern for the ls command, and "session" as well could be added to the pattern.
 

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LEARN ABOUT OPENDARWIN

exigrep

EXIGREP(8)						      System Manager's Manual							EXIGREP(8)

NAME

       EXIGREP - Search Exim's main log

SYNOPSIS

       exigrep [-l] pattern [log file] ...

DESCRIPTION

       The  exigrep  utility  is  a  Perl script that searches one or more main log files for entries that match a given pattern.  When it finds a
       match, it extracts all the log entries for the relevant message, not just those that match the pattern.	Thus, exigrep can extract complete
       log entries for a given message, or all mail for a given user, or for a given host, for example.

       The -l flag means 'literal', that is, treat all characters in the pattern as standing for themselves.  Otherwise the pattern must be a Perl
       regular expression.  The pattern match is case-insensitive.  If no file names are given on the command line, the standard input is read.

       If the location of a zcat command is known from the definition of ZCAT_COMMAND in Local/Makefile, exigrep  automatically  passes  any  file
       whose name ends in COMPRESS_SUFFIX through zcat as it searches it.

BUGS

       This manual page needs a major re-work. If somebody knows better groff than us and has more experience in writing manual pages, any patches
       would be greatly appreciated.

SEE ALSO

       exim(8), perlre(1), /usr/share/doc/exim4-base/

AUTHOR

       This manual page was stitched together from spec.txt by Andreas Metzler <ametzler at downhill.at.eu.org>, for the Debian  GNU/Linux  system
       (but may be used by others).

								  March 26, 2003							EXIGREP(8)
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