mirror of https://github.com/mkerrisk/man-pages
89 lines
2.7 KiB
Groff
89 lines
2.7 KiB
Groff
.\" Hey Emacs! This file is -*- nroff -*- source.
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.\"
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.\" Copyright (c) 1993 Michael Haardt
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.\" (michael@moria.de)
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.\" Fri Apr 2 11:32:09 MET DST 1993
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" The GNU General Public License's references to "object code"
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.\" and "executables" are to be interpreted as the output of any
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.\" document formatting or typesetting system, including
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.\" intermediate and printed output.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this manual; if not, write to the Free
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.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
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.\" USA.
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.\"
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.\" Modified Sat Jul 24 14:23:14 1993 by Rik Faith (faith@cs.unc.edu)
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.\" Modified Sun Oct 18 17:31:43 1998 by Andries Brouwer (aeb@cwi.nl)
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.\"
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.TH FTIME 3 2001-12-14 "Linux" "Linux Programmer's Manual"
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.SH NAME
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ftime \- return date and time
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.SH SYNOPSIS
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.B "#include <sys/timeb.h>"
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.sp
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.BI "int ftime(struct timeb *" tp );
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.SH DESCRIPTION
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Return current date and time in
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.IR tp ,
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which is declared as follows:
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.sp
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.in +4n
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.nf
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struct timeb {
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time_t time;
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unsigned short millitm;
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short timezone;
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short dstflag;
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};
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.fi
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.in
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.LP
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Here \fItime\fP is the number of seconds since the Epoch,
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\fImillitm\fP is the number of milliseconds since \fItime\fP
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seconds since the Epoch, \fItimezone\fP is the local time zone
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measured in minutes of time west of Greenwich, and \fIdstflag\fP
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is a flag that, if non-zero, indicates that Daylight Saving time
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applies locally during the appropriate part of the year.
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.LP
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These days the contents of the \fItimezone\fP and \fIdstflag\fP
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fields are undefined.
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.SH "RETURN VALUE"
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This function always returns 0.
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.SH "CONFORMING TO"
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4.2BSD, POSIX.1-2001.
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.\" FIXME . Mar 08: The next POSIX.1 revision removes ftime().
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.SH BUGS
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This function is obsolete.
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Don't use it.
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If the time in seconds
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suffices,
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.BR time (2)
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can be used;
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.BR gettimeofday (2)
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gives microseconds;
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.BR clock_gettime (3)
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gives nanoseconds but is not yet widely available.
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.LP
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Under libc4 and libc5 the \fImillitm\fP field is meaningful.
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But early glibc2 is buggy and returns 0 there;
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glibc 2.1.1 is correct again.
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.\" .SH HISTORY
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.\" The
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.\" .BR ftime ()
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.\" function appeared in 4.2BSD.
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.SH "SEE ALSO"
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.BR gettimeofday (2),
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.BR time (2)
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