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Full Discussion: Unable to capture value from function
Operating Systems Linux Red Hat Unable to capture value from function Post 303002581 by pradeep84in on Monday 28th of August 2017 06:58:54 AM
Old 08-28-2017
Unable to capture value from function
Hi Experts,

Am writing a code which need to check for the previous day date and pickup the file as per the previous day date.

Problem: Why variable "YDATE" is empty ?

O/S: RHEL 5.6

Shell: BASH

Desired O/P: ls -lrt /opt/test/user/atsuser.NHU/out/demon.08272017

When I checked the permission, user is having the permission to check the file and file is present on the desired location.

Code:
Code:
#!/bin/bash

set -x

YESTERDAY_DATE()
{
        date '+%d %m %Y' |
        {
                read DAY MONTH YEAR
                DAY=`expr "$DAY" - 1 + 100 | cut -c2-3`
                case "$DAY" in
                        0)
                                MONTH=`expr "$MONTH" - 1`
                                case "$MONTH" in
                                        0)
                                                MONTH=12
                                                YEAR=`expr "$YEAR" -1`
                                                ;;
                                esac
                        DAY=`cal $MONTH $YEAR | grep . | fmt -1 | tail -1`
                esac

                vardt=$?
                if [ $vardt -ne 0 ];then
                        echo "ERROR DURING SPOOLING PREVIOUS DAY DATE."
                        exit 1
                fi

                YDATE=${MONTH}${DAY}${YEAR}
        }
}


YESTERDAY_DATE

echo $YDATE

echo ${YDATE}

ls -lrt ${PATH}/out/demon.${YDATE}

Output of the same is as below.

Code:
+ YESTERDAY_DATE
+ date '+%d %m %Y'
+ read DAY MONTH YEAR
++ expr 28 - 1 + 100
++ cut -c2-3
+ DAY=27
+ case "$DAY" in
+ vardt=0
+ '[' 0 -ne 0 ']'
+ YDATE=08272017
+ echo

+ echo

+ ls -lrt /opt/test/user/atsuser.NHU/out/demon.
ls: cannot access /opt/test/user/atsuser.NHU/out/demon.: No such file or directory

Last edited by pradeep84in; 08-28-2017 at 10:05 AM.. Reason: updated with the O/S, problem, desired result, etc.
 

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LEARN ABOUT MOJAVE

widget_calendar

widget_calendar(n)					    widget::calendar Megawidget 					widget_calendar(n)

__________________________________________________________________________________________________________________________________________________

NAME

       widget_calendar - widget::calendar Megawidget

SYNOPSIS

       package require Tcl  8.4

       package require Tk  8.4

       package require widget  ?3.0?

       widget::calendar pathname ?options?

_________________________________________________________________

DESCRIPTION

       This package provides a calendar megawidget (snidget).

       widget::calendar pathname ?options?

WIDGET OPTIONS

       -command
	      A script to evaluate when a date was selected.

       -dateformat
	      The format of the date that is returned. Default: %m/%d/%Y.

       -firstday
	      Set first day the week, Either sunday or monday. It defaults to monday.

       -font  Select the font used in the widget. It defaults to Helvetica 9.

       -highlightcolor
	      Selects the background color for the day that has been selected. Default: #FFCC00

       -language
	      Specify  language of the calendar contents. The language is specified by abbreviations of the languge, for example: en - english, de
	      - german ...  It defaults to en.

	      Supported languages: en, de, fr, it, es, pt, ru, sv, zh, fi

       -shadecolor
	      Selects the color of the parts that have a shaded background. Default: #888888

       -showpast
	      Specify if the past shall be shown. It is a boolean value and defaults to 1.

       -textvariable
	      Specifies the name of a variable whose value is linked to the entry widget's contents.  Whenever the  variable  changes  value,  the
	      widget's contents are updated, and vice versa.

WIDGET COMMAND

       pathname get ?what?

       Returns	a  part  of  the  selected date or 'all'. The argument what selects the part. Valid values for what are: day, month, year and all.
       'all' is the default and returns the complete date in the format given with -dateformat.

DEFAULT BINDINGS

       On creation of the calendar widget the following bindings are installed.

       o      Up - Move to week before current date

       o      Down - Move to week after current date

       o      Left - Move to day before current date

       o      Right - Move to day after current date

       o      Control-Left - Move to month before current date

       o      Control-Right - Move to month after current date

       o      Control-Up - Move to year before current date

       o      Control-Down - Move to year after current date

EXAMPLE

	   package require widget::calendar ; # or widget::all
	   set t [widget::calendar .t]
	   pack $t -fill x -expand 1

KEYWORDS

       megawidget, snit, widget

widget								       0.93							widget_calendar(n)
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