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Full Discussion: Change Date Input :-
Top Forums Shell Programming and Scripting Change Date Input :- Post 302970636 by kshji on Saturday 9th of April 2016 11:14:44 AM
Old 04-09-2016
ksh93 using builtin time conversion and calculation:
Code:
#!/usr/bin/ksh93

X1=02 ### Hour
Y1=20160405 ## Date
Z1=4 ## I want to Back 4 Hour

day=$(printf "%(%Y-%m-%d)T" $Y1)
timestamp="$day $X1:00:00"
epoc=$(printf "%(%#)T" "$timestamp")


cnt=1
str=""
while ((cnt<=Z1))
do

        h=$(printf "%(%H)T" "#$epoc")
        ((h==0)) && h=24
        str="$str$h "
        ((epoc-=3600))  # 1 hour, 3600 s
        ((cnt+=1))
done

endday=$(printf "%(%Y%m%d)T" "#$epoc")
echo List=$str
echo Y1=$endday

 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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