ftime(3) Library Functions Manual ftime(3)
NAME
ftime - return date and time
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <sys/timeb.h>
int ftime(struct timeb *tp);
DESCRIPTION
NOTE: This function is no longer provided by the GNU C library. Use
clock_gettime(2) instead.
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 Green-
wich (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 │
└────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
None.
HISTORY
Removed in glibc 2.33. 4.2BSD, POSIX.1-2001. Removed in POSIX.1-2008.
This function is obsolete.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 ALSO
gettimeofday(2), time(2)
Linux man-pages 6.9.1 2024-05-02 ftime(3)
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