Adding a List of Times Post: 302981243

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Top Forums Shell Programming and Scripting Adding a List of Times Post 302981243 by Brusimm on Thursday 8th of September 2016 08:01:58 PM

09-08-2016

Registered User

Adding a List of Times

Hey gang, I have a list of times I need to sum up. This list can vary from a few to a few thousand entries. Now I had found a closed reference to adding time titled "add up time with xx:yy format in bash how?" In it, the example works great for that formatted list of times... This is the reply code from user AGAMA in that thread:

Code:

list="1:11 0:13 2:06 1:38 1:36 0:06 0:31 0:33 0:38 0:44"

h=0
m=0
for x in ${list}
do
    h=$(( h + ${x%%:*} ))   # add hours and minutes
    m=$(( m + ${x##*:} ))
done

h=$(( h + (m /60) ))    # minutes are likely more than 60, calc hours and add in 
m=$(( m % 60 ))     # adjust minutes

echo "${h}hrs ${m}min

"

BUT what I'm getting hung up on is how would I introduce the third parameter of seconds to this, if my times had the three columns?

I'm not quite verse enough in scripting to understand the formatting of the read in the 'do' loop. Are the '%' and '#' arbitrary or necessary for what they're representing?

In the other thread Agama tries to explain parameter expansion in a latter reply, but try as I may, I'm not wrapping my shrunken brain around this. I do need a bit of assistance trying to figure it out and adding in the seconds to tally up.

Thank you.

Brusimm

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LEARN ABOUT NETBSD

leave

LEAVE(1)						    BSD General Commands Manual 						  LEAVE(1)

NAME

     leave -- remind you when you have to leave

SYNOPSIS

     leave [[+]hhmm]

DESCRIPTION

     leave waits until the specified time (within the next 12 hours), then reminds you that you have to leave by writing to the TTY that you exe-
     cuted leave on.

     You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter.	When you log off, leave exits just
     before it would have printed the next message.

OPTIONS

     hhmm  The time of day is in the form hhmm where hh is a time in hours (on a 12 or 24 hour clock), and mm are minutes.

	   However, all times are converted to a 12 hour clock, and assumed to be in the next 12 hours.  An attempt to set an alarm for farther
	   into the future will be truncated to within the next 12 hours.

     +	   If the time is preceded by '+', the alarm will go off in hours and minutes from the current time.

     If no argument is given, leave prompts with "When do you have to leave?".	A reply of newline causes leave to exit, otherwise the reply is
     assumed to be a time.  This form is suitable for inclusion in a ~/.login or ~/.profile.

SEE ALSO

     calendar(1), csh(1), sh(1)

HISTORY

     The leave command appeared in 3.0BSD.

BUGS

     In the modern age with X(7) and window multiplexing programs like window(1) and screen(1), the leave command's reminders and admonitions
     might not be seen if the user has the window where leave was started minimized or obscured.

     This all begs for a more general user notifications system to be implemented.

BSD
								 January 19, 2002							       BSD

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