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date subtraction(URGENT)
Post 302170312 by Sreejith_VK on Monday 25th of February 2008 07:14:56 AM
02-25-2008
Hi vino,
Posts are similar but the first one was in the year "2006".
This is not a home work.
I am writing a unix program which will generate a report of a process.The process is having two logs the start.log(time of start of process )and the end.log(end time of the process).
I want in my report to show the over all time of the process for that i will have to subtract the end time from start time.
I know to fetch the data from the logs.
Now i want to subtract the two dates.
The datecalc is also not working as this invloves characters.
Request expert help.
Posts are similar but the first one was in the year "2006".
This is not a home work.
I am writing a unix program which will generate a report of a process.The process is having two logs the start.log(time of start of process )and the end.log(end time of the process).
I want in my report to show the over all time of the process for that i will have to subtract the end time from start time.
I know to fetch the data from the logs.
Now i want to subtract the two dates.
The datecalc is also not working as this invloves characters.
Request expert help.
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LEARN ABOUT DEBIAN
difftime
DIFFTIME(3) Linux Programmer's Manual DIFFTIME(3) NAME
difftime - calculate time difference SYNOPSIS
#include <time.h> double difftime(time_t time1, time_t time0); DESCRIPTION
The difftime() function returns the number of seconds elapsed between time time1 and time time0, represented as a double. Each of the times is specified in calendar time, which means its value is a measurement (in seconds) relative to the Epoch, 1970-01-01 00:00:00 +0000 (UTC). CONFORMING TO
SVr4, 4.3BSD, C89, C99. NOTES
On a POSIX system, time_t is an arithmetic type, and one could just define #define difftime(t1,t0) (double)(t1 - t0) when the possible overflow in the subtraction is not a concern. On other systems, the data type time_t might use some other encoding where subtraction doesn't work directly. SEE ALSO
date(1), gettimeofday(2), time(2), ctime(3), gmtime(3), localtime(3) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
2010-02-25 DIFFTIME(3)