1.\" Copyright (c) 1988, 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
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29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34.\" SUCH DAMAGE.
35.\"
36.\" @(#)getenv.3 8.2 (Berkeley) 12/11/93
37.\" $FreeBSD: head/lib/libc/stdlib/getenv.3 131728 2004-07-06 23:21:36Z hmp $
38.\"
39.Dd December 11, 1993
40.Dt GETENV 3
41.Os
42.Sh NAME
43.Nm getenv ,
44.Nm putenv ,
45.Nm setenv ,
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108.Fn unsetenv
109function
110deletes all instances of the variable name pointed to by
111.Fa name
112from the list.
113.Sh RETURN VALUES
114The
115.Fn getenv
116function returns the value of the environment variable as a nul terminated
117string.
118If the variable
119.Fa name
120is not in the current environment,
121.Dv NULL
122is returned.
123.Pp
124.Rv -std setenv putenv
125.Sh ERRORS
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2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
--- 20 unchanged lines hidden (view full) ---
29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34.\" SUCH DAMAGE.
35.\"
36.\" @(#)getenv.3 8.2 (Berkeley) 12/11/93
37.\" $FreeBSD: head/lib/libc/stdlib/getenv.3 131728 2004-07-06 23:21:36Z hmp $
38.\"
39.Dd December 11, 1993
40.Dt GETENV 3
41.Os
42.Sh NAME
43.Nm getenv ,
44.Nm putenv ,
45.Nm setenv ,
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108.Fn unsetenv
109function
110deletes all instances of the variable name pointed to by
111.Fa name
112from the list.
113.Sh RETURN VALUES
114The
115.Fn getenv
116function returns the value of the environment variable as a nul terminated
117string.
118If the variable
119.Fa name
120is not in the current environment,
121.Dv NULL
122is returned.
123.Pp
124.Rv -std setenv putenv
125.Sh ERRORS
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