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Full Discussion: How to send mail at specific calculated time interval?
Top Forums Shell Programming and Scripting How to send mail at specific calculated time interval? Post 302998614 by nalu on Monday 5th of June 2017 04:54:04 AM
Old 06-05-2017
How to send mail at specific calculated time interval?
Hi All,
I want to send an email if the time difference from previous mail sent is more than or equal to 30 mins.
I have written below code and it's working fine.
In this script I am storing previous mail sent time in txt file.
Instead of storing in txt file how to store in a variable.
Initially I am putting some date manually in the file prev_mail_sent.txt to assume initial mail sent.

Please help to implement this without creating any file use variable.
Code:
v_par=8
num_minutes=30
if [[ $v_par -eq 8 ]]; then
mail_date=`cat prev_mail_sent.txt`
curr_date=$(date +"%Y-%m-%d %H:%M:%S")
diff_sec=`echo "$(($(date -d "$curr_date" '+%s') - $(date -d "$mail_date" '+%s')))"`
d_min=`expr $diff_sec / 60`
if [[ $d_min -ge  $num_minutes ]]; then
mail -s "mail sent"
rm -f prev_mail_sent.txt
printf "$(date +"%Y-%m-%d %H:%M:%S")\n" > prev_mail_sent.txt
fi
fi

Thanks in advance.
 

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LEARN ABOUT SUNOS

from

from(1B)					     SunOS/BSD Compatibility Package Commands						  from(1B)

NAME

       from - display the sender and date of newly-arrived mail messages

SYNOPSIS

       /usr/ucb/from [-s sender] [username]

DESCRIPTION

       The  from utility prints out the mail header lines in your mailbox file to show you who your mail is from. If  username is specified, user-
       name's mailbox is examined instead of your own.

OPTIONS

       The following option is supported:

       -s sender       Only display headers for mail sent by  sender.

USAGE

       See largefile(5) for the description of the behavior of from when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

FILES

       /var/mail/*

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       biff(1B), mail(1B), attributes(5), largefile(5)

SunOS 5.10							    28 Jan 2004 							  from(1B)
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