time(3) Library Functions Manual time(3)Name
time, ftime - get date and time
Syntax
#include <time.h>
time_t time((time_t *)0)
time_t time(tloc)
time_t *tloc;
#include <sys/timeb.h>
void ftime(tp)
struct timeb *tp;
Description
The subroutine returns the time since 00:00:00 GMT, Jan. 1, 1970, measured in seconds.
If tloc is nonnull, the return value is also stored in the place to which tloc points.
The entry fills in a structure pointed to by its argument, as defined by <sys/timeb.h>:
struct timeb
{
time_t time;
unsigned short millitm;
short timezone;
short dstflag;
};
The structure contains the time since the epoch in seconds, up to 1000 milliseconds of more-precise interval, the local time zone (measured
in minutes of time westward from Greenwich), and a flag that, if nonzero, indicates that Daylight Saving time applies locally during the
appropriate part of the year.
See Alsodate(1), gettimeofday(2), settimeofday(2), ctime(3)time(3)
Check Out this Related Man Page
FTIME(3) Linux Programmer's Manual FTIME(3)NAME
ftime - return date and time
SYNOPSIS
#include <sys/timeb.h>
int ftime(struct timeb *tp);
DESCRIPTION
Return current date and time in tp, which is declared as follows:
struct timeb {
time_t time;
unsigned short millitm;
short timezone;
short dstflag;
};
Here time is the number of seconds since the epoch, millitm is the number of milliseconds since time seconds since the epoch, timezone is
the local time zone measured in minutes of time west of Greenwich, and dstflag is a flag that, if nonzero, indicates that Daylight Saving
time applies locally during the appropriate part of the year.
These days the contents of the timezone and dstflag fields are undefined.
RETURN VALUE
This function always returns 0.
BUGS
This function is obsolete. Don't use it. If the time in seconds suffices, time(2) can be used; gettimeofday(2) gives microseconds;
clock_gettime(3) gives nanoseconds but is not yet widely available.
Under libc4 and libc5 the millitm field is meaningful. But early glibc2 is buggy and returns 0 there; glibc 2.1.1 is correct again.
HISTORY
The ftime() function appeared in 4.2BSD.
CONFORMING TO
BSD 4.2, POSIX 1003.1-2001.
SEE ALSO gettimeofday(2), time(2)Linux 2001-12-14 FTIME(3)
Strange behaviour of the strftime() function from gawk (3.1.5):
$ awk 'BEGIN{print strftime("%T", 3600)}'
> 02:00:00
$ awk 'BEGIN{print strftime("%T", 0)}'
> 01:00:00
Obviously something with DST but I can not figure out why? To me 3600 epoch seconds remains 01:00, DST or not.
From... (2 Replies)
Hi Everyone
i have a perl file below, one of the line is convert the pcho time to human readable format.
$value=`awk 'BEGIN{print strftime("%c",1273236600)}' | tr -d '\n'`;
if image, if i have lots of pcho time value in a file, if i use this awk, strftime, then tr -d to remove the \n,... (2 Replies)
Hi,
I'm wrote a small program on HPUX that uses wcsftime, but this function seems to be not working - I get 0 as a result, the output buffer returns empty, and errno is 0 :
#include <iostream>
using namespace std;
int main ()
{
size_t formattedTimeLength = 0;
wchar_t formattedTime... (9 Replies)
Hi,
I am facing one strange situation while using strftime() to get current date and time in C.
it leaks memory with %T
strftime(L_StrDate,30,"%d-%b-%C%y %T", localtime((time_t *)&tv.tv_sec)) ;
and when i use another option then no memory leak like
strftime(L_StrDate,30,"%d-%b-%C%y ... (3 Replies)
HI,
i wish to convert a millsec value to a readable string format.
the one option is to use strftime.
However this is a bit costly (1-5 micros).
is there a a faster way to do so with just string manipulation
(Note i have the date object which has the time details but wish o avoid strftime) (2 Replies)
Hello all,
I have the following code that seems to be misbehaving depending on the timezone setting (TZ Environment variable). It gives the correct value when TZ is in POSIX format and the wrong value when in OLSON format.
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include... (6 Replies)
I frequently use awk time functions and am switching some scripts over to mawk. I don't have the mktime or strftime functions in mawk, but it appears that there is a way, as explained here in "Time functions":
Please only cut-and-past links to man pages from our man pages.
So, simple... (10 Replies)
I'm trying to use AWK to filter on some dates in a field by converting them to Unix Time.
mktime(strftime(format,"6-FEB-2013 08:50:03.841")What is the proper format for my date strings as they appear in my database?
My first thought is %d-%b-%Y %H:%M:%Sbut I see the following issues:
%d is... (3 Replies)
I am using Sun OS 5.10
I am Using nawk to extract specific column from csv file.
The third column of csv is the time in Milliseconds and I need to convert it to Date then save it in another csv file.
I am use this command to extract the columns I need and save it in tttn.csv
nawk 'BEGIN... (6 Replies)