Add -e to set arbitrary kernel environment variables.

Nextboot(8) can now set any combination of kernel name (-k), kernel
options (-o), and environment strings (-e).  As a result of this change
-k also becomes optional.

Reviewed by:	freebsd-current (Ian Lepore, pluknet@, jhb@)

1 files changed, 10 insertions, 3 deletions

diff --git a/sbin/reboot/nextboot.8 b/sbin/reboot/nextboot.8
index 99986b1..eb38319 100644
--- a/sbin/reboot/nextboot.8
+++ b/sbin/reboot/nextboot.8
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 4, 2002
+.Dd January 31, 2012
 .Dt NEXTBOOT 8
 .Os
 .Sh NAME
@@ -32,15 +32,17 @@
 .Nd "specify an alternate kernel and boot flags for the next reboot"
 .Sh SYNOPSIS
 .Nm
+.Op Fl e Ar variable=value
 .Op Fl f
+.Op Fl k Ar kernel
 .Op Fl o Ar options
-.Fl k Ar kernel
 .Nm
 .Fl D
 .Sh DESCRIPTION
 The
 .Nm
-utility allows specifying an alternate kernel and/or boot flags for the
+utility allows specifying some combination of an alternate kernel, boot flags
+and kernel environment for the
 next time the machine is booted.
 Once the
 .Xr loader 8
@@ -58,6 +60,11 @@ with this
 option removes an existing
 .Nm
 configuration.
+.It Fl e Ar variable=value
+This option adds the provided variable and value to the kernel environment.
+The value is quoted when written to the
+.Nm
+configuration.
 .It Fl f
 This
 option disables the sanity checking which checks if the kernel really exists