diff options
Diffstat (limited to 'doc/client/tools/augeas.txt')
| -rw-r--r-- | doc/client/tools/augeas.txt | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/doc/client/tools/augeas.txt b/doc/client/tools/augeas.txt index 94ed9066f..6fed5f5ce 100644 --- a/doc/client/tools/augeas.txt +++ b/doc/client/tools/augeas.txt @@ -26,11 +26,20 @@ give it a sequence of commands: The commands are run in document order. There's no need to do an explicit ``save`` at the end. -Each of these commands will only be run if the path does not already -have the given setting. That is, the ip address for the first host -record will only be set to ``192.168.0.1`` if it's not set to that -value already. Its canonical name will only be set to -``pigiron.example.com`` if it's not that already; and so on. +These commands will be run if any of the paths do not already +have the given setting. In other words, if any command has not +already been run, they will all be run. + +So, if the first host already has all of the specified settings, then +that Path will verify successfully and nothing will be changed. But +suppose the first host looks like this:: + + 192.168.0.1 pigiron.example.com pigiron + +All that is missing is the second alias, ``piggy``. The entire Augeas +script will be run in this case. It's important, then, to ensure that +all commands you use are idempotent. (For instance, the ``Move`` and +``Insert`` commands are unlikely to be useful.) The Augeas paths are all relative to ``/files/etc/hosts``. @@ -39,6 +48,20 @@ tags are: ``Remove``, ``Move``, ``Set``, ``Clear``, ``SetMulti``, and ``Insert``. Refer to the official Augeas docs or the `Schema`_ below for details on the commands. +The Augeas tool also supports one additional directive, ``Initial``, +for setting initial file content when a file does not exist. For +instance, the ``Xml`` lens fails to parse a file that does not exist, +and, as a result, you cannot add content to it. You can use +``Initial`` to circumvent this issue: + +.. code-block:: xml + + <Path type="augeas" name="/etc/test.xml" lens="Xml" + owner="root" group="root" mode="0640"> + <Initial><Test/></Initial> + <Set path="Test/#text" value="text content"/> + </Path> + Editing files outside the default load path =========================================== |