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 3.27 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)
Check Out this Related Man Page
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)
How to print current date of the Unix system accessing thru C++ program ?
I wrote like this
#include <time.h>
.......
time_t tt;
struct tm *tod;
....
time(&tt);
tod = localtime(&tt);
cout << tod->tm_mon + 1 << "/"
<< tod->tm_mday << "/"
... (6 Replies)
Hi all,
I need the date subtraction fuctionality using shell commands.
For example:
date1:Wed Apr 5 08:35:21 IST 2006
date2:Tue Apr 4 10:35:44 IST 2006
I need the date subtraction result like " 22 hours 23 seconds".
Please guide me to complete this task.
Can you please help me ASAP.
... (3 Replies)
Hello,
I have found a piece of code which converts seconds elapsed since 1970 for an input date. Can anyone please explain a little bit the code below:
#!/bin/bash
# function to reproduce UNIX time() value
second()
{
set -- $(TZ=GMT date '+%Y %m %d')
local y=$1 m=1$2 d=1$3
((m-=103,... (0 Replies)
Hi,
There is requirement in our project where in we have to calculate the elpased time of the process which are running and then if the elapsed time is greater than specific time we have to send a mail.
In order to calculate the elapsed time we ahve use "ps -ef" command.The time displayed in... (6 Replies)
var=50
perl -le "print scalar localtime (time() - "$var"*60);"
The above does subtraction of time,but i need the time format to be
date +%Y%m%d%H%M%S.
How can i achive this (6 Replies)
Hi
Is there a way to calculate the page load time, I am trying to calculate the load time of a page locally. I found tools to do this over http or https but none that work locally.
Any ideas?
Thanks. (4 Replies)
hi,
I am using parameter to get the new hour as below
time=30
time1=1 hours
v_StartTime=`date +'%F %T'`
v_EndTime=`date +'%F %T' -d ''$time' minutes'`
v_EndTime1=`date +'%F %T' -d ''$time1'`
echo $v_StartTime
echo $v_EndTime
echo $v_EndTime1
but i am getting error as
test.ksh:... (1 Reply)
Hi Friends,
I have the following logfile.
i want to make a script for calculate time by time2 - time1
1600266278|random|1|2014-09-19 02:08:56.024|2014-09-19 02:08:59.398|A|B|ROOM|Num0208559970111101788|1|dog|dos
1600266200|random|4|2014-09-19 02:08:06.572|2014-09-19... (2 Replies)