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Full Discussion: Bash Script equivalent KSH script?
Top Forums Shell Programming and Scripting Bash Script equivalent KSH script? Post 302402079 by boy18nj on Monday 8th of March 2010 10:03:34 PM
Old 03-08-2010
Bash Script equivalent KSH script?
I always find BASH easier than ksh. At my home, i have written this bash script. I am finding it hard to write its equivalent in ksh, any suggestions?

Code:
######################################
#return seconds since `00:00:00 1970-01-01 UTC' (a GNU extension)
######################################
date2stamp () {
    date --utc --date "$1" +%s
}
######################################
# finds number of days between two times
# dateDiff -d "23:59:59" "16:15:07"
# number of hours between two times
# dateDiff -h "23:59:59" "16:15:07"
# number of minutes between two times
# dateDiff -m "23:59:59" "16:15:07"
# number of seconds between two times
# dateDiff -s "23:59:59" "16:15:07"
######################################
dateDiff (){
    case $1 in
        -s)   sec=1;      shift;;
        -m)   sec=60;     shift;;
        -h)   sec=3600;   shift;;
        -d)   sec=86400;  shift;;
        *)    sec=86400;;
    esac
    dte1=$(date2stamp $1)
    dte2=$(date2stamp $2)
    diffSec=$((dte2-dte1))
    if ((diffSec < 0)); then abs=-1; else abs=1; fi
    return $((diffSec/sec*abs))
}

dateDiff -h "23:59:59" `date '+%T'`

Last edited by vino; 03-09-2010 at 12:24 AM.. Reason: added code tags
 

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LEARN ABOUT OPENSOLARIS

tcl_gettime

Tcl_GetTime(3TCL)					      Tcl Library Procedures						 Tcl_GetTime(3TCL)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_GetTime - get date and time

SYNOPSIS

       #include <tcl.h>

       Tcl_GetTime( timePtr )

ARGUMENTS

       Tcl_Time *   timePtr   (out)	Points to memory in which to store the date and time information.
_________________________________________________________________

DESCRIPTION

       The  Tcl_GetTime function retrieves the current time as a Tcl_Time structure in memory the caller provides.  This structure has the follow-
       ing definition:
	      typedef struct Tcl_Time {
		  long sec;
		  long usec;
	      } Tcl_Time;

       On return, the sec member of the structure is filled in with the number of seconds that have elapsed since the  epoch:  the  epoch  is  the
       point  in time of 00:00 UTC, 1 January 1970.  This number does not count leap seconds - an interval of one day advances it by 86400 seconds
       regardless of whether a leap second has been inserted.

       The usec member of the structure is filled in with the number of microseconds that have elapsed since the start of the second designated by
       sec.  The Tcl library makes every effort to keep this number as precise as possible, subject to the limitations of the computer system.	On
       multiprocessor variants of Windows, this number may be limited to the 10- or 20-ms granularity of the system clock.   (On  single-processor
       Windows systems, the usec field is derived from a performance counter and is highly precise.)

SEE ALSO

       clock

KEYWORDS

       date, time

ATTRIBUTES

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

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWTcl	      |
       +--------------------+-----------------+
       |Interface Stability | Uncommitted     |
       +--------------------+-----------------+
NOTES

       Source for Tcl is available on http://opensolaris.org.

Tcl									8.4							 Tcl_GetTime(3TCL)
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