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Full Discussion: md5sum output append
Top Forums Shell Programming and Scripting md5sum output append Post 302531935 by Corona688 on Saturday 18th of June 2011 05:52:56 PM
Old 06-18-2011
Running complex external utilities like cut and awk to operate on single lines is very wasteful. You might be spending more time loading and quitting these things than doing anything else. You can improve that a lot by using read's own built-in processing abilities.

Code:
find /path/to/files -type f -printf "%p %A+ %6s %T+ %C+\n" |
while read name atime size mtime ctime
do
        # sets $1 to md5sum output, $2 to filename, etc.
        set -- `md5sum $name`
        echo "$atime (a), $size, $name $1"
        echo "$mtime (m), $size, $name $1"
        echo "$ctime (c), $size, $name $1"
done

Or since you were using awk anyway, do it all in awk:

Code:
# -print pattern has no %p or newline.  then it runs md5sum which adds both 
find /path/to/files -type f -printf "%A+ %6s %T+ %C+ " -exec md5sum '{}' ';' |
awk '{
        print $1, "(a),", $2 ",", $6, $5;
        print $3, "(m),", $2 ",", $6, $5;
        print $4, "(c),", $2 ",", $6, $5;
}'

Last edited by Corona688; 06-18-2011 at 06:59 PM..
 

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LEARN ABOUT MOJAVE

rcvpack

RCVPACK(1)							     [nmh-1.5]								RCVPACK(1)

NAME

       rcvpack - append message to file

SYNOPSIS

       /usr/lib/mh/rcvpack file [-mbox] [-mmdf] [-version] [-help]

DESCRIPTION

       The rcvpack program will append a copy of the message to the file listed on its command line.

       If the -mbox switch is given (the default), then the messages are separated using mbox (uucp) style delimiters.	This is the format used by
       most mail clients (elm, mailx, etc.).

       If the -mmdf switch is given, then the messages are separated by mmdf style delimiters.	Each message in the  file  is  separated  by  four
       CTRL-A's and a newline.

       rcvpack will correctly lock and unlock the file to serialize access to the file, when running multiple copies of rcvpack .

       In general, its use is obsoleted by the file action of slocal, although it might still have occasional uses in various shell scripts.

FILES

       /etc/nmh/mts.conf	  nmh mts configuration file

SEE ALSO

       rcvdist(1), rcvstore(1), rcvtty(1), slocal(1)

BUGS

       Only two return codes are meaningful, others should be.

MH.6.8								   11 June 2012 							RCVPACK(1)
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