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.
SEE ALSO date(1), gettimeofday(2), time(2), ctime(3), gmtime(3), localtime(3)COLOPHON
This page is part of release 3.53 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 2012-12-22 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)
Hello to anyone who can help me!
I am in need of some help in procuring a more exact timing scheme in C for use with gcc.
I manage to get a timing in seconds just fine using difftime(). However, I need more accurate.. milliseconds... no clue.
Please help?
Brian (2 Replies)
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)
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$3
((m-=103,... (0 Replies)
Hi,
There is requirement in our project where in we have to calculate the elpased time of the process which are running and then if the elapsed time is greater than specific time we have to send a mail.
In order to calculate the elapsed time we ahve use "ps -ef" command.The time displayed in... (6 Replies)
Hi All,
In our code we are using below code to calculate the UNIX Epoch Time from the time stamp present in the file.
Can any one explain how the DC operates in below command and how we calculate the UNIX EPOCH time from this.
Date incide the file is 20:26:51
Output we get is 1289943554... (3 Replies)
I'm extracting two time & date values from a log file, and I need a way to calculate the elapsed time between the two. The values are in this format:
Feb 12 10:53:15
Feb 12 10:59:57
The difference is 6 minutes and 42 seconds
Does anyone know if there is a way to do this? I've seen lots of... (4 Replies)
I have a file wich contains time formats and i need to get the time difference
TIME1 TIME2
==================================
20120624192555.6Z 20120624204006.5Z
which means first date 2012/6/24 19:25:55,second date 2012/6/24 20:40:06 so when i get the time... (1 Reply)
Hi,
I am unable to Difference between two time stamps in Linux and display the total elapsed time .
Source date: Aug 15, 2012 02:00:03
Target date: Aug 14, 2012 18:00:03
# based on the forums I am using the below function. Converted dates into this format
Src_dt=20120814180003... (7 Replies)
hi,
I am using parameter to get the new hour as below
time=30
time1=1 hours
v_StartTime=`date +'%F %T'`
v_EndTime=`date +'%F %T' -d ''$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)