8f9c737173
The handbooks are not installed there anymore. While here, improve the URLs markup a bit. Reviewed by: allanjude@ MFC after: 2 weeks Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D15793
86 lines
2.5 KiB
Groff
86 lines
2.5 KiB
Groff
.\" Copyright (c) 2002 The FreeBSD Project.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 13, 2018
|
|
.Dt GETOSRELDATE 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getosreldate
|
|
.Nd get the value of
|
|
.Dv __FreeBSD_version
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In unistd.h
|
|
.Ft int
|
|
.Fn getosreldate void
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn getosreldate
|
|
function returns an integer showing the version of the
|
|
currently running
|
|
.Fx
|
|
kernel.
|
|
Definitions of the values can be found in
|
|
.%B "The Porter's Handbook":
|
|
.Pp
|
|
.Lk https://www.FreeBSD.org/doc/en/books/porters-handbook/
|
|
.Sh RETURN VALUES
|
|
Upon successful completion,
|
|
.Fn getosreldate
|
|
returns the value requested;
|
|
otherwise the value \-1 is returned and the global variable
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ENVIRONMENT
|
|
.Bl -tag -width ".Ev OSVERSION"
|
|
.It Ev OSVERSION
|
|
If the environment variable
|
|
.Ev OSVERSION
|
|
is set, it will override the
|
|
.Fn getosreldate
|
|
return value.
|
|
.El
|
|
.Sh EXAMPLES
|
|
An example can be found in
|
|
.Pa /usr/share/examples/FreeBSD_version .
|
|
.Sh ERRORS
|
|
The
|
|
.Fn getosreldate
|
|
function may fail and set
|
|
.Va errno
|
|
for any of the errors specified for the library function
|
|
.Xr sysctl 3 .
|
|
.Sh SEE ALSO
|
|
.Rs
|
|
.%B "The Porter's Handbook"
|
|
.Re
|
|
.Sh HISTORY
|
|
The
|
|
.Fn getosreldate
|
|
function appeared in
|
|
.Fx 2.0 .
|