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Top Forums Shell Programming and Scripting I can't seem to pass variables properly into a nawk statement Post 302180155 by DeCoTwc on Sunday 30th of March 2008 06:41:05 AM
Old 03-30-2008
Thanks for the input. I'm not sure what you mean by

"In awk, $m means the field number indicated by the number in the variable m. So no wonder that part didn't work."

I've checked and rechecked my variables and I'm relatively certain that they are correct. I know date ...print $3 gives me the day (for today the number 30) and I know date... print $2 gives me the Month (for today Mar). So for today for example, I know $d is 30 and $m is Mar.

So for example the last line of the /var/adm/messages currently is:

Mar 30 06:20:29 bms02-XXX-QN-XXXXX-XXXX inetd[164]: [ID 101010 daemon.error] ftp/tcp: bind: Address already in use

so by my understanding when I invoke
Code:
nawk -v m=$m -v d=$d  '{if ($1 == "$m" && $2 == "$d") print "success"}'
#if

I'm saying
-within this statement make m the value of $m outside the statement
-within this statement make d the value of $d outside the statement
-if the first column of the last line of the log is equal to $m (Mar)
and
-the second column of the last line of the log is equal to $d (30)
then
-print "success"

but from what I'm gathering within the nawk statement, my variables aren't being set, so i'm basically getting

if column 1 = ""
and
if column 2 = ""
print "success"

but since that's not what column 1 & 2 are, it's failing and printing nothing

I hope that I'm explaining myself well here...I'm new to this forum, and I don't want to look silly...

Regarding $e, that's for future use...if I can get the nawk to print success, then once I uncomment those last few lines the bash if statement should make it go back through the log and print all the messages for that day (which as I said will eventually get dumped into an email so we can all panic over failed root logins)

Oh and yes the log is growing, but the last line always starts with Mar 30, so no matter what the line is, I should still be able to chop that off.

...Sorry for being so long winded, it's just my style
 

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ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME
       ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices

SYNOPSIS
       /usr/ucb/ucblinks [-e rulebase] [-r rootdir]

DESCRIPTION
       ucblinks  creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
       ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.

       ucblinks does not remove unneeded compatibility links; these must be removed by hand.

       ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been  created,
       since the reconfiguration may have resulted in more compatibility names being needed.

       In  releases prior to SunOS 5.4, ucblinks used a  nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses  nawk
       for the default operation, although  nawk rule-bases can still be specifed with the -e option.  The  nawk rule-base equivalent to the SunOS
       5.4 default operation can be found in /usr/ucblib/ucblinks.awk.

OPTIONS
       -e rulebase     Specify rulebase as the file containing nawk(1) pattern-action statements.

       -r rootdir      Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.

FILES
       /usr/ucblib/ucblinks.awk        sample rule-base for compatibility links

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)

SunOS 5.10							    13 Apr 1994 						      ucblinks(1B)
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