63 lines
1.4 KiB
Groff
63 lines
1.4 KiB
Groff
.\" Copyright (c) 1980 Regents of the University of California.
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.\" All rights reserved. The Berkeley software License Agreement
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.\" specifies the terms and conditions for redistribution.
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.\"
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.\" @(#)gettimeofday.2 6.7 (Berkeley) 5/14/86
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.\"
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.TH TIME 2 "May 14, 1986"
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.UC 4
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.SH NAME
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time, stime \- get/set date and time
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.SH SYNOPSIS
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.nf
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.ft B
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#include <sys/types.h>
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#include <time.h>
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time_t time(time_t *\fItp\fP)
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int stime(time_t *\fItp\fP)
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.fi
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.SH DESCRIPTION
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The system's notion of the current Greenwich time
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is obtained with the
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.B time
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call, and set with the
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.B stime
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call.
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The time is expressed
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in seconds since midnight (0 hour), January 1, 1970.
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The time is both returned by
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.B time
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and stored in the variable pointed to by
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.I tp
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unless
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.I tp
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is the null pointer.
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.PP
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.B Stime
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obtains the time to set from the variable pointed to by
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.IR tp .
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.PP
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Only the super-user may set the time of day.
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.SH RETURN
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A 0 return value from
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.B stime
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indicates that the call succeeded.
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.B Time
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returns the current time on success.
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A \-1 return value indicates an error occurred, and in this
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case an error code is stored into the global variable \fBerrno\fP.
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.SH "ERRORS
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The following error codes may be set in \fBerrno\fP:
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.TP 15
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[EFAULT]
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The
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.I tp
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address referenced invalid memory.
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.TP 15
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[EPERM]
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A user other than the super-user attempted to set the time.
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.SH "SEE ALSO"
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.BR date (1),
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.BR ctime (3).
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