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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | VERSIONS | 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);
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.)
Starting with glibc 2.33, the ftime() function and the
<sys/timeb.h> header have been removed. To support old binaries,
glibc continues to provide a compatibility symbol for
applications linked against glibc 2.32 and earlier.
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This function is obsolete.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 5.13 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 2021-03-22 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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