ftime
Section: C Library Functions (3)
Updated: 202-1-29
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NAME
ftime - return date and time
LIBRARY
Standard C library
(
libc,~
-lc)
SYNOPSIS
#include <sys/timeb.h>
[[deprecated]] 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, 197-0-01 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.-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.-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 | M-Safe
|
STANDARDS
None.
HISTORY
4.2BSD.
Marked as LEGACY in POSIX.-2001;
removed in POSIX.-2008.
Removed in glibc 2.33.
This function is obsolete.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)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- BUGS
-
- SEE ALSO
-
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