1.\" $NetBSD: env.1,v 1.15 2020/02/08 11:10:08 leot Exp $ 2.\" 3.\" Copyright (c) 1980, 1990 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" the Institute of Electrical and Electronics Engineers, Inc. 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)printenv.1 6.7 (Berkeley) 7/28/91 33.\" $NetBSD: env.1,v 1.15 2020/02/08 11:10:08 leot Exp $ 34.\" 35.Dd February 8, 2020 36.Dt ENV 1 37.Os 38.Sh NAME 39.Nm env 40.Nd set and print environment 41.Sh SYNOPSIS 42.Nm 43.Op Fl 0i 44.Op Fl u Ar name 45.Op Ar name=value ... 46.Oo 47.Ar utility 48.Op argument ... 49.Oc 50.Sh DESCRIPTION 51.Nm 52executes 53.Ar utility 54after modifying the environment as 55specified on the command line. 56The option 57.Ar name=value 58specifies 59an environmental variable, 60.Ar name , 61with a value of 62.Ar value . 63The option 64.Sq Fl i 65causes 66.Nm 67to completely ignore the environment 68it inherits. 69.Pp 70The option 71.Sq Fl u Ar name 72causes removal of the 73.Ar name 74environment variable if it is in the environment. 75This is similar to the 76.Ic unset 77command in 78.Xr sh 1 . 79The value for 80.Ar name 81must not include the 82.Ql = 83character. 84.Pp 85If no 86.Ar utility 87is specified, 88.Nm 89prints out the names and values of the variables in the environment. 90Each 91.Ar name=value 92pair is separated by a new line unless 93.Fl 0 94is specified, in which case name/value pairs are separated by NUL. 95Both 96.Fl 0 97and 98.Ar utility 99must not be specified together. 100.Sh EXIT STATUS 101.Nm 102exits with one of the following values: 103.Bl -tag -width Ds 104.It 0 105.Ar utility 106was invoked and completed successfully. 107In this case the exit code is returned by the utility itself, not 108.Nm . 109If no utility was specified, then 110.Nm 111completed successfully and returned the exit code itself. 112.It 1 113An invalid command line option was passed to 114.Nm . 115.It 1\-125 116.Ar utility 117was invoked, but failed in some way; 118see its manual page for more information. 119In this case the exit code is returned by the utility itself, not 120.Nm . 121.It 125 122.Ar utility 123was specified together with the 124.Fl 0 125option. 126.It 126 127.Ar utility 128was found, but could not be invoked. 129.It 127 130.Ar utility 131could not be found. 132.El 133.Sh COMPATIBILITY 134The historic 135.Fl 136option has been deprecated but is still supported in this implementation. 137.Pp 138The 139.Fl u 140and 141.Fl 0 142options are non-standard extensions. 143.Sh SEE ALSO 144.Xr execvp 3 , 145.Xr environ 7 146.Sh STANDARDS 147The 148.Nm 149utility conforms to 150.St -p1003.2-92 . 151.Sh HISTORY 152The 153.Nm 154command appeared in 155.Bx 4.4 . 156.Pp 157The 158.Fl u 159and 160.Fl 0 161options first appeared in 162.Nx 10 . 163.Sh BUGS 164.Nm 165doesn't handle commands with equal 166.Pq Dq = 167signs in their 168names, for obvious reasons. 169