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Full Discussion: Shell script question on variables
Top Forums UNIX for Dummies Questions & Answers Shell script question on variables Post 302303957 by vidyadhar85 on Saturday 4th of April 2009 04:13:26 AM
Old 04-04-2009
if its not bash don't use set command
try this
Code:
#!/bin/sh

# set endtime and print elapsed time
starttime=`date +%s`
echo "Value of starttime: " $starttime
sleep 1
endtime=`date +%s`
echo "Value of endtime: " $endtime
elapsedtime=$(($endtime - $starttime))
printf "Script took %02d:%02d:%02d to complete\n" $((elapsedtime/3600)) $((elapsedtime/60%60)) $((elapsedtime%60))

or try this also

Code:
awk -v start_time=$1 -v end_time=$2 'BEGIN{
if ( start_time !~ /^[0-9]/ || end_time !~ /^[0-9]/ )
usage(start_time,end_time)
split(start_time,T2,":")
split(end_time,T1,":")
start_seconds=T1[1]*60*60+T1[2]*60+T1[3]
end_seconds=T2[1]*60*60+T2[2]*60+T2[3]
if ( start_seconds > 86401 || end_seconds > 86401)
usage("out_off_range","")
elapsed_seconds=start_seconds-end_seconds
if( elapsed_seconds < 0 )
{elapsed_seconds=elapsed_seconds*-1
calculate(end_time,start_time,elapsed_seconds)}
else
calculate(start_time,end_time,elapsed_seconds)}
function calculate(start_time,end_time,elapsed_seconds){
HH=elapsed_seconds / 3600
MM=(elapsed_seconds % 3600) / 60
SS=elapsed_seconds % 60
printf  "TIME DIFFERENCE BETWEEN "start_time"(START TIME)-"end_time"(END TIME)--> +%02d:%02d:%02d\n",HH,MM,SS }
function usage(start_time,end_time){
if( start_time=="out_off_range" )
printf "TIME OUT OFF RANGE\n"
else
printf "INVALID TIME FORMAT "start_time" "end_time"\n"
printf "USAGE : time_diff.sh <HH:MM[:SS]> <HH:MM[:SS]>\n"
exit}'

 

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LEARN ABOUT CENTOS

service

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

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

       If the init script file does not exist, the script tries to use legacy actions.	If there is no suitable legacy action found and COMMAND is
       one of actions specified in LSB Core Specification, input is redirected to the systemctl.  Otherwise the command fails with return code 2.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)

								     Jan 2006								service(8)
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