1FTIME(3)                   Linux Programmer's Manual                  FTIME(3)
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NAME

6       ftime - return date and time
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SYNOPSIS

9       #include <sys/timeb.h>
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11       int ftime(struct timeb *tp);
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DESCRIPTION

14       This  function  returns  the  current  time as seconds and milliseconds
15       since the Epoch, 1970-01-01 00:00:00 +0000 (UTC).  The time is returned
16       in tp, which is declared as follows:
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18           struct timeb {
19               time_t         time;
20               unsigned short millitm;
21               short          timezone;
22               short          dstflag;
23           };
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25       Here  time is the number of seconds since the Epoch, and millitm is the
26       number of milliseconds since time seconds since the Epoch.   The  time‐
27       zone  field  is  the local timezone measured in minutes of time west of
28       Greenwich (with a negative value indicating minutes east of Greenwich).
29       The  dstflag  field is a flag that, if nonzero, indicates that Daylight
30       Saving time applies locally during the appropriate part of the year.
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32       POSIX.1-2001 says that the contents of the timezone and dstflag  fields
33       are unspecified; avoid relying on them.
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RETURN VALUE

36       This function always returns 0.  (POSIX.1-2001 specifies, and some sys‐
37       tems document, a -1 error return.)
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ATTRIBUTES

40       For  an  explanation  of  the  terms  used   in   this   section,   see
41       attributes(7).
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43       ┌──────────┬───────────────┬─────────┐
44       │Interface │ Attribute     │ Value   │
45       ├──────────┼───────────────┼─────────┤
46       │ftime()   │ Thread safety │ MT-Safe │
47       └──────────┴───────────────┴─────────┘

CONFORMING TO

49       4.2BSD,   POSIX.1-2001.   POSIX.1-2008  removes  the  specification  of
50       ftime().
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52       This function is obsolete.  Don't use it.  If the time in seconds  suf‐
53       fices,   time(2)  can  be  used;  gettimeofday(2)  gives  microseconds;
54       clock_gettime(2) gives nanoseconds but is not as widely available.
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BUGS

57       Early glibc2 is buggy and returns 0 in the millitm field;  glibc  2.1.1
58       is correct again.
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SEE ALSO

61       gettimeofday(2), time(2)
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COLOPHON

64       This  page  is  part of release 4.16 of the Linux man-pages project.  A
65       description of the project, information about reporting bugs,  and  the
66       latest     version     of     this    page,    can    be    found    at
67       https://www.kernel.org/doc/man-pages/.
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71GNU                               2017-09-15                          FTIME(3)
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