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Full Discussion: difference in date
Top Forums Shell Programming and Scripting difference in date Post 302366854 by frans on Friday 30th of October 2009 02:09:15 PM
Old 10-30-2009
a little script
Code:
# Calc the difference between 2 dates in seconds, minutes, hours or days
dateDiff ()    {    # 1: [-s, -m, -h, -d]    2: Date1    3: Date2
    case $1 in
        -s )    SEC=1;    shift    ;;
        -m )    SEC=60;    shift    ;;
        -h )    SEC=3600;    shift    ;;
        -d )    SEC=86400;    shift    ;;
        * )    SEC=86400    ;;
    esac
    DTE1=$(date -u --date "$1" +%s) # Converts date into UNIX timestamp
    DTE2=$(date -u --date "$2" +%s)
    if [ $DTE1 -gt $DTE2 ]
    then    let "DIFFSEC=(DTE1-DTE2)/SEC"
    else    let "DIFFSEC=(DTE2-DTE1)/SEC"
    fi
    echo $DIFFSEC
}

Last edited by frans; 10-30-2009 at 04:11 PM.. Reason: unknown function, replaced with correct syntax
 

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LEARN ABOUT MOJAVE

hfsc

HFSC(8)                                                                Linux                                                               HFSC(8)

NAME

       HFSC - Hierarchical Fair Service Curve's control under linux

SYNOPSIS

       tc qdisc add ... hfsc [ default CLASSID ]

       tc class add ... hfsc [ [ rt SC ] [ ls SC ] | [ sc SC ] ] [ ul SC ]

       rt : realtime service curve
       ls : linkshare service curve
       sc : rt+ls service curve
       ul : upperlimit service curve

       o at least one of rt, ls or sc must be specified
       o ul can only be specified with ls or sc

       SC := [ [ m1 BPS ] d SEC ] m2 BPS
              m1 : slope of the first segment
              d  : x-coordinate of intersection
              m2 : slope of the second segment

       SC := [ [ umax BYTE ] dmax SEC ] rate BPS
              umax : maximum unit of work
              dmax : maximum delay
              rate : rate

       For description of BYTE, BPS and SEC - please see UNITS section of tc(8).

DESCRIPTION (qdisc)
       HFSC qdisc has only one optional parameter - default. CLASSID specifies the minor part of the default classid, where packets not classified
       by other means (e.g. u32 filter, CLASSIFY target of iptables) will be enqueued. If default is not specified, unclassified packets  will  be
       dropped.

DESCRIPTION (class)
       HFSC  class is used to create a class hierarchy for HFSC scheduler. For explanation of the algorithm, and the meaning behind rt, ls, sc and
       ul service curves - please refer to tc-hfsc(7).

       As you can see in SYNOPSIS, service curve (SC) can be specified in two ways. Either as maximum delay for certain amount of work,  or  as  a
       bandwidth assigned for certain amount of time. Obviously, m1 is simply umax/dmax.

       Both m2 and rate are mandatory. If you omit other parameters, you will specify linear service curve.

SEE ALSO

       tc(8), tc-hfsc(7), tc-stab(8)

       Please direct bugreports and patches to: <netdev@vger.kernel.org>

AUTHOR

       Manpage created by Michal Soltys (soltys@ziu.info)

iproute2                                                          31 October 2011                                                          HFSC(8)
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