Exports

/etc/exports contains lines associating a directory with one or more hosts, and NFS options for each host.

$ augtool
augtool> ls /files/etc/exports/
comment[1] = /etc/exports: the access control list for filesystems which may be exported
comment[2] = to NFS clients.  See exports(5).
comment[3] = sample /etc/exports file
dir[1]/ = /
dir[2]/ = /projects
dir[3]/ = /usr
dir[4]/ = /home/joe


augtool> ls /files/etc/exports/dir[1]
client[1]/ = master
client[2]/ = trusty

The corresponding line in the file is

/               master(rw) trusty(rw,no_root_squash)

Digging further

augtool> ls /files/etc/exports/dir[1]/client[1]
option = rw

To add a new entry, you'd do something like this:

augtool> set /files/etc/exports/dir[10000] /foo
augtool> set /files/etc/exports/dir[last()]/client[1] weeble
augtool> set /files/etc/exports/dir[last()]/client[1]/option[1] ro
augtool> set /files/etc/exports/dir[last()]/client[1]/option[2] all_squash
augtool> save
Saved 1 file(s)

Which creates the line

/foo weeble(ro,all_squash)

This lens cannot handle options without a host, as with the last example line in “man 5 exports”:

/pub (ro,insecure,all_squash)

In this case, though, you can just do

/pub *(ro,insecure,all_squash)

It also can’t handle whitespace before the directory name.