Many small edits.

man/man4/INDEX

@@ -2,5 +2,6 @@
 intro 0intro.4
 9pserve 9pserve.4
 acme acme.4
+import import.4
 plumber plumber.4
 ramfs ramfs.4

man/man4/acme.4

@@ -25,14 +25,10 @@ of
 itself.
 When a command is run under
 .IR acme ,
-a directory holding these files is mounted on
-.B /mnt/acme
-(also bound to
-.BR /mnt/wsys )
-and also
-.BR /dev ;
-the files mentioned here
-appear in both those directories.
+a directory holding these files is posted as the 9P service
+.B acme
+(using
+.IR 9pserve (4)).
 .PP
 Some of these files supply virtual versions of services available from the underlying
 environment, in particular the character terminal files in Plan 9's

man/man4/import.4

@@ -0,0 +1,106 @@
+.TH IMPORT 4
+.SH NAME
+import \- import 9P resources from another system
+.SH SYNOPSIS
+.B import
+[
+.B -df
+]
+[
+.B -n
+.I ns
+]
+[
+.B -p
+.I prog
+]
+[
+.B -s
+.I service
+]
+.I system
+.SH DESCRIPTION
+.I Import
+presents the 9P service
+.I service
+(default
+.BR plumb )
+running on
+.I system
+as a service on the local system,
+in the current name space.
+.PP
+The
+.B -n
+option sets the remote name space directory
+where
+.I import
+should expect to find
+.IR service .
+If it is not specified,
+.I import
+uses name of the local system's name space directory.
+(Since name space directories are conventionally inside
+.BR /tmp ,
+the path have different meanings on the two systems.)
+.PP
+.I Import
+connects to
+.I system
+using
+.IR ssh (1).
+It invokes
+.I import
+on the remote system to carry out the remote
+side of the protocol.
+The
+.B -p
+option specifies the path to
+.I import
+on the remote system, in case it is not in the system search path.
+.PP
+The
+.B -d
+option turns on debugging.
+The
+.B -f
+option keeps
+.I import
+from forking itself into the background, also useful for debugging.
+.SH EXAMPLE
+Suppose you run
+.B sam
+.B -r
+to the CPU server
+.IR anna .
+.I Sam
+wants to talk to a plumber on the local terminal,
+but the file names will refer to files on
+.IR anna .
+.PP
+To fix this problem, create a new name space directory
+and start a new plumber on
+.IR anna :
+.IP
+.EX
+remotens=/tmp/ns.`whoami`.on.`hostname`
+ssh anna mkdir $remotens
+ssh anna NAMESPACE=$remotens plumber
+.EE
+Now import that plumber to the local name space before starting
+.I sam
+and
+.IR 9term :
+.IP
+.EX
+NAMESPACE=/tmp/ns.anna
+mkdir $NAMESPACE
+import -n $remotens -s plumb anna
+sam &
+9term ssh anna &
+.EE
+.SH SOURCE
+.B \*9/src/cmd/import.c
+.SH SEE ALSO
+.IR 9pserve (4),
+.IR intro (4)

man/man4/plumber.4

@@ -16,7 +16,7 @@ messages between programs.
 Its behavior is programmed by a
 .I plumbing
 file (default
-.BR /usr/$user/lib/plumbing )
+.BR $HOME/lib/plumbing )
 in the format of
 .IR plumb (7).
 .PP
@@ -96,9 +96,9 @@ However, ports are never deleted dynamically; if a new set of rules does not
 include a port that was defined in earlier rules, that port will still exist (although
 no new messages will be delivered there).
 .SH FILES
-.TF /usr/$user/lib/plumbing
+.TF $HOME/lib/plumbing
 .TP
-.B /usr/$user/lib/plumbing
+.B $HOME/lib/plumbing
 default rules file
 .TP
 .B \*9/plumb