Add -0 option to ENV(1)

With the -0 option added to ENV(1), some ports will no longer require genv
from sysutils/coreutils.

Reviewed by:	kevans (prior version), swills
Approved by:	bcr (manpages), imp
Differential Revision:	https://reviews.freebsd.org/D22230

1 files changed, 13 insertions, 4 deletions

diff --git a/usr.bin/env/env.1 b/usr.bin/env/env.1
index 943ce7341bf7..bb3e4e719526 100644
--- a/usr.bin/env/env.1
+++ b/usr.bin/env/env.1
@@ -31,7 +31,7 @@
 .\" From FreeBSD: src/usr.bin/printenv/printenv.1,v 1.17 2002/11/26 17:33:35 ru Exp
 .\" $FreeBSD$
 .\"
-.Dd April 17, 2008
+.Dd November 7, 2019
 .Dt ENV 1
 .Os
 .Sh NAME
@@ -39,7 +39,7 @@
 .Nd set environment and execute command, or print environment
 .Sh SYNOPSIS
 .Nm
-.Op Fl iv
+.Op Fl 0iv
 .Op Fl P Ar altpath
 .Op Fl S Ar string
 .Op Fl u Ar name
@@ -64,6 +64,8 @@ is executed.
 .Pp
 The options are as follows:
 .Bl -tag -width indent
+.It Fl 0
+End each output line with NUL, not newline.
 .It Fl i
 Execute the
 .Ar utility
@@ -130,8 +132,15 @@ If no
 .Ar utility
 is specified,
 .Nm
-prints out the names and values
-of the variables in the environment, with one name/value pair per line.
+prints out the names and values of the variables in the environment.
+Each name/value pair is separated by a new line unless
+.Fl 0
+is specified, in which case name/value pairs are separated by NUL.
+Both
+.Fl 0
+and
+.Ar utility
+may not be specified together.
 .\"
 .Ss Details of Fl S \&Ss (split-string) processing
 The processing of the