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FTIME
Section: Linux Programmer's Manual (3)
Updated: 2008-06-23
Index
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NAME
ftime - return date and time
SYNOPSIS
#include <sys/timeb.h>
int ftime(struct timeb *tp);
DESCRIPTION
This function returns the current time, in seconds and milliseconds
since the Epoch (00:00:00 UTC, 1 January 1970).
The time is returned 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,
and millitm is the number of milliseconds since time
seconds since the Epoch.
The timezone field is the local time zone measured in minutes
of time west of Greenwich (with a negative value indicating minutes
east of Greenwich).
The dstflag field
is a flag that, if non-zero, indicates that Daylight Saving time
applies locally during the appropriate part of the year.
POSIX.1-2001 says that the contents of the timezone and dstflag
fields are unspecified; avoid relying on them.
RETURN VALUE
This function always returns 0.
(POSIX.1-2001 specifies, and some systems document, a -1 error return.)
CONFORMING TO
4.2BSD, POSIX.1-2001.
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This function is obsolete.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.
SEE ALSO
gettimeofday(2),
time(2)
COLOPHON
This page is part of release 3.05 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- BUGS
-
- SEE ALSO
-
- COLOPHON
-
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