145 lines
3.9 KiB
Groff
145 lines
3.9 KiB
Groff
.\" Copyright (c) 1980, 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the Institute of Electrical and Electronics Engineers, Inc.
|
|
.\" 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.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
.\"
|
|
.\" From @(#)printenv.1 8.1 (Berkeley) 6/6/93
|
|
.\" From FreeBSD: src/usr.bin/printenv/printenv.1,v 1.17 2002/11/26 17:33:35 ru Exp
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 12, 2003
|
|
.Dt ENV 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm env
|
|
.Nd set and print environment
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl i
|
|
.Op Ar name Ns = Ns Ar value ...
|
|
.Op Ar utility Op Ar argument ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility executes
|
|
.Ar utility
|
|
after modifying the environment as
|
|
specified on the command line.
|
|
The option
|
|
.Ar name Ns = Ns Ar value
|
|
specifies
|
|
an environment variable,
|
|
.Ar name ,
|
|
with a value of
|
|
.Ar value .
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width indent
|
|
.It Fl i
|
|
Execute the
|
|
.Ar utility
|
|
with only those environment values specified.
|
|
The environment inherited
|
|
by
|
|
.Nm env
|
|
is ignored completely.
|
|
.El
|
|
.Pp
|
|
If no utility is specified,
|
|
.Nm env
|
|
prints out the names and values
|
|
of the variables in the environment, with one name/value pair per line.
|
|
.Pp
|
|
The
|
|
.Nm env
|
|
utility is sometimes useful with the
|
|
.Dq Li #!
|
|
construct (see
|
|
.Xr execve 2 ) .
|
|
The only difference between
|
|
.Dq Li #!/usr/local/bin/foo
|
|
and
|
|
.Dq Li "#!/usr/bin/env\ /usr/local/bin/foo"
|
|
is that the latter works even if
|
|
.Pa /usr/local/bin/foo
|
|
is itself interpreted.
|
|
Using
|
|
.Nm env
|
|
this way also allows one to reference
|
|
.Pa foo
|
|
without the path,
|
|
as well as set up the environment as desired.
|
|
.Sh ENVIRONMENT
|
|
The
|
|
.Nm env
|
|
utility uses the
|
|
.Ev PATH
|
|
environment variable is used to locate the requested
|
|
.Ar utility
|
|
if the name contains no
|
|
.Ql /
|
|
characters.
|
|
.Sh DIAGNOSTICS
|
|
.Ex -std env
|
|
An exit status of 126 indicates
|
|
.Ar utility
|
|
was found, but could not be executed.
|
|
An exit status of 127 indicates
|
|
.Ar utility
|
|
could not be found.
|
|
.Sh COMPATIBILITY
|
|
The
|
|
.Nm env
|
|
utility accepts the
|
|
.Fl
|
|
option as a synonym for
|
|
.Fl i .
|
|
.Sh SEE ALSO
|
|
.Xr printenv 1 ,
|
|
.Xr sh 1 ,
|
|
.Xr execvp 3 ,
|
|
.Xr environ 7
|
|
.Sh STANDARDS
|
|
The
|
|
.Nm env
|
|
utility conforms to
|
|
.St -p1003.1-2001 .
|
|
.\".Sh HISTORY
|
|
.\"The
|
|
.\".Nm
|
|
.\"command appeared in
|
|
.\".Bx 3.0 .
|
|
.Sh BUGS
|
|
The
|
|
.Nm env
|
|
utility doesn't handle utility arguments with equal (``='') signs in their
|
|
names, for obvious reasons.
|