NAME¶
ftime - return date and time
SYNOPSIS¶
#include <sys/timeb.h>
int ftime(struct timeb *tp);
DESCRIPTION¶
This function returns the current time as seconds and milliseconds since the
Epoch, 1970-01-01 00:00:00 +0000 (UTC). 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 timezone 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 nonzero, 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.)
ATTRIBUTES¶
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
ftime () |
Thread safety |
MT-Safe |
4.2BSD, POSIX.1-2001. POSIX.1-2008 removes the specification of
ftime().
This function is obsolete.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(2) gives nanoseconds but is not as widely available.
BUGS¶
Early glibc2 is buggy and returns 0 in the
millitm field; glibc 2.1.1 is
correct again.
SEE ALSO¶
gettimeofday(2),
time(2)
COLOPHON¶
This page is part of release 4.10 of the Linux
man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at
https://www.kernel.org/doc/man-pages/.