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Full Discussion: using awk inside bash script?
Top Forums UNIX for Dummies Questions & Answers using awk inside bash script? Post 302503906 by xaiu on Saturday 12th of March 2011 08:21:42 PM
Old 03-12-2011
using awk inside bash script?
Hello,

I'm trying to write a bash script that will query the current system time (OS X 10.6.6) and then convert the output from HH:MM:SS into time in seconds. The output of the system time command (systemsetup -gettime) is returned as:

Time: HH:MM:SS

so I wanted to use awk -F: to grab HH:MM:SS

From the command line I can:

Code:
prompt: systemsetup -gettime ; a=$(systemsetup -gettime) ; echo $a | awk -F: '{print $2":"$3":"$4}'
  Time: 22:32:59 <-- output of systemsetup -gettime
   22:32:59 <-- tells me that I want to capture $2, $3, and $4

How do I assign $2, $3, and $4 from awk to the variables hr, min, and sec?

Thank you all in advance!

---------- Post updated at 06:21 PM ---------- Previous update was at 10:26 AM ----------

Sorry, I didn't know how to use the code tags.

I found a different method to capture the hours, minutes, and seconds, so in the above example I now have:

Code:
d=$ref_time
IFS=":"
set -- $d
hr=$2
min=$3
sec=$4

# strip leading white space from hr
hr=$(echo $hr | tr -d " ")

so if ref_time was set to "Time: 22:32:59" then
Code:
prompt: echo $ref_time
Time: 22:32:59
prompt: echo $hr $min $sec
22 32 59

I would now like to re-assemble hr, min, and sec into a single variable. I tried variations of:
Code:
set_time=$hr":"$min":"$sec

but with everything I've tried echo $set_time still returns 22 32 59 and I need it to return 22:32:59 with the :'s.

Any advice?
Last edited by xaiu; 03-12-2011 at 09:37 PM..
 

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LEARN ABOUT DEBIAN

pct-scanner-script

PCT-SCANNER-SCRIPT(1)					      General Commands Manual					     PCT-SCANNER-SCRIPT(1)

NAME

       pct-scanner-script - easy scan and create merged DjVu and PDF documents for archiving

SYNOPSIS

       pct-scanner-script [--help]

DESCRIPTION

       pct-scanner-script  is  a  bash script and configuration system to easily scan documents and create a digital archiving. It can create DjVu
       PDF and JPEG outputs, in merged and individual files. It also has a configuration system where different  configurations  can  be  defined,
       making it easy to switch between configurations.

       Please use pct-scanner-script --help to find all program options, the complete help, and all examples.

       Features:
	 - auto archiving in merged and individual DjVu, PDF, and JPEG files
	 - auto and manual resume when scanning somehow fails
	 - cascading configuration system, for easy customizing
	 - easy command-line-style bash program, with useful options
	 - archiving made possible with both adf and flatbed scanners
	 - built for productivity and daily use
	 - uses bash, scanadf and other mainstream processing tools
	 - multilanguage commandline output

OPTIONS

       -h, --help, -?
	      Show summary of options, help, and examples.

DEBUGGING

       This  program  is  a  helper  script  to easy scan and automated digital document archiving for normal and adf scanners. You can debug this
       script by running it as bash -x pct-scanner-script [options]. The script is just a nice wrapper for the scanadf, DjVu and PDF tools.

SEE ALSO

       scanadf(1),

AUTHOR

       pct-scanner-script and this manual page are written by:
	      Jelle de Jong <jelledejong@powercraft.nl>.

								  March 31, 2009					     PCT-SCANNER-SCRIPT(1)
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