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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | BUGS | SEE ALSO | COLOPHON |
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FTIME(3) Linux Programmer's Manual FTIME(3)
ftime - return date and time
#include <sys/timeb.h>
int ftime(struct timeb *tp);
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 Green‐
wich). 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.
This function always returns 0. (POSIX.1-2001 specifies, and some
systems document, a -1 error return.)
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This function is obsolete.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.
Early glibc2 is buggy and returns 0 in the millitm field; glibc 2.1.1
is correct again.
gettimeofday(2), time(2)
This page is part of release 4.15 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/.
GNU 2017-09-15 FTIME(3)
Pages that refer to this page: clock_getres(2), gettimeofday(2), syscalls(2), time(2), unimplemented(2)
Copyright and license for this manual page
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