1 .\" Copyright (c) 2002 The FreeBSD Project.
2 .\" All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
13 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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27 .Dd September 30, 2008
43 function returns an integer showing the version of the
47 Definitions of the values can be found in
48 .%B "The Porter's Handbook"
49 which is usually installed at
50 .Pa /usr/share/doc/en_US.ISO8859-1/books/porters-handbook/ .
52 Upon successful completion,
54 returns the value requested;
55 otherwise the value \-1 is returned and the global variable
57 is set to indicate the error.
59 .Bl -tag -width ".Ev OSVERSION"
61 If the environment variable
63 is set, it will override the
68 An example can be found in
69 .Pa /usr/share/examples/FreeBSD_version .
73 function may fail and set
75 for any of the errors specified for the library function
79 .%B "The Porter's Handbook"
80 .%O /usr/share/doc/en_US.ISO8859-1/books/porters\-handbook/