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Full Discussion: Diff between two time in hours in last column
Top Forums Shell Programming and Scripting Diff between two time in hours in last column Post 302876351 by Akshay Hegde on Saturday 23rd of November 2013 07:33:40 AM
Old 11-23-2013
Quote:
Originally Posted by jaydeep_sadaria
Dear Akahay..

Sry. I was in hurry. nwak gives error of mktime is undefined function. What can be done? Can you guide me what is wrong in while loop code.

Code:
nawk '{s=$1 " "$2;t=$3" "$4;gsub(/\-|:/," ",s);gsub(/\-|:/," ",t); print $0, (mktime(s)-mktime(t))/3600}' ip.txt
2013-11-23 15:51:23 2013-11-23 12:20:06 BRC023 CG nawk: calling undefined function mktime
 input record number 1, file ip.txt
 source line number 1

Regards
Jaydeep
I am basically gawk user I heard that mktime() is NOT a standard awk feature. It is a gawk feature, I am not sure about nawk .But still you can use bash solution which I have given or try with these /usr/xpg4/bin/awk or /usr/xpg6/bin/awk

following is working I tested with your sample data
Code:
while read line; do
    IFS=' '; read -r  s1 s2 s3 s4 _ _ <<< $line
    echo  $line $((  ( $(date --date="$s1 $s2" +%s) - $(date --date="$s3 $s4" +%s) )/3600 ))
done <"file"

 

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LEARN ABOUT HPUX

ucblinks

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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