FTIME(3) Linux Programmer's Manual FTIME(3)NAMEftime - 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 time‐
zone 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 sys‐
tems 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 │
└──────────┴───────────────┴─────────┘
CONFORMING TO
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This function is obsolete.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 suf‐
fices, 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 ALSOgettimeofday(2), time(2)COLOPHON
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description of the project, information about reporting bugs, and the
latest version of this page, can be found at
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GNU 2017-09-15 FTIME(3)
