| .\" Copyright (c) 1993 Michael Haardt |
| .\" (michael@moria.de) |
| .\" Fri Apr 2 11:32:09 MET DST 1993 |
| .\" |
| .\" %%%LICENSE_START(GPLv2+_DOC_FULL) |
| .\" This is free documentation; you can redistribute it and/or |
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| .\" published by the Free Software Foundation; either version 2 of |
| .\" the License, or (at your option) any later version. |
| .\" |
| .\" The GNU General Public License's references to "object code" |
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| .\" document formatting or typesetting system, including |
| .\" intermediate and printed output. |
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| .\" GNU General Public License for more details. |
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| .\" Modified Sat Jul 24 14:23:14 1993 by Rik Faith (faith@cs.unc.edu) |
| .\" Modified Sun Oct 18 17:31:43 1998 by Andries Brouwer (aeb@cwi.nl) |
| .\" 2008-06-23, mtk, minor rewrites, added some details |
| .\" |
| .TH FTIME 3 2021-03-22 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| ftime \- return date and time |
| .SH SYNOPSIS |
| .nf |
| .B "#include <sys/timeb.h>" |
| .PP |
| .BI "int ftime(struct timeb *" tp ); |
| .fi |
| .SH DESCRIPTION |
| .BR NOTE : |
| This function is no longer provided by the GNU C library. |
| Use |
| .BR clock_gettime (2) |
| instead. |
| .PP |
| 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 |
| .IR tp , |
| which is declared as follows: |
| .PP |
| .in +4n |
| .EX |
| struct timeb { |
| time_t time; |
| unsigned short millitm; |
| short timezone; |
| short dstflag; |
| }; |
| .EE |
| .in |
| .PP |
| Here \fItime\fP is the number of seconds since the Epoch, |
| and \fImillitm\fP is the number of milliseconds since \fItime\fP |
| seconds since the Epoch. |
| The \fItimezone\fP field is the local timezone measured in minutes |
| of time west of Greenwich (with a negative value indicating minutes |
| east of Greenwich). |
| The \fIdstflag\fP field |
| is a flag that, if nonzero, indicates that Daylight Saving time |
| applies locally during the appropriate part of the year. |
| .PP |
| POSIX.1-2001 says that the contents of the \fItimezone\fP and \fIdstflag\fP |
| fields are unspecified; avoid relying on them. |
| .SH RETURN VALUE |
| This function always returns 0. |
| (POSIX.1-2001 specifies, and some systems document, a \-1 error return.) |
| .SH VERSIONS |
| Starting with glibc 2.33, the |
| .BR ftime () |
| function and the |
| .I <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. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR ftime () |
| T} Thread safety MT-Safe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| 4.2BSD, POSIX.1-2001. |
| POSIX.1-2008 removes the specification of |
| .BR ftime (). |
| .PP |
| This function is obsolete. |
| Don't use it. |
| If the time in seconds |
| suffices, |
| .BR time (2) |
| can be used; |
| .BR gettimeofday (2) |
| gives microseconds; |
| .BR clock_gettime (2) |
| gives nanoseconds but is not as widely available. |
| .SH BUGS |
| Early glibc2 is buggy and returns 0 in the |
| .I millitm |
| field; |
| glibc 2.1.1 is correct again. |
| .\" .SH HISTORY |
| .\" The |
| .\" .BR ftime () |
| .\" function appeared in 4.2BSD. |
| .SH SEE ALSO |
| .BR gettimeofday (2), |
| .BR time (2) |
