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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | BUGS | SEE ALSO | COLOPHON |
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ftime(3) Library Functions Manual ftime(3)
ftime - return date and time
Standard C library (libc, -lc)
#include <sys/timeb.h>
int ftime(struct timeb *tp);
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 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.
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 │
└──────────────────────────────────────┴───────────────┴─────────┘
None.
4.2BSD. Marked as LEGACY in POSIX.1-2001; removed in
POSIX.1-2008. 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This function is obsolete.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.
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 the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-06-28 ftime(3)
Pages that refer to this page: clock_getres(2), gettimeofday(2), syscalls(2), time(2), unimplemented(2)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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