On Wednesday 08 September 2010 08:50:29 martin f krafft wrote:
> Augtool insists on writing to the filesystem, even if it does not
> need to make any changes. For instance, the following fails because
> /etc is mounted read-only, and hence /etc/ssh/sshd_config.augnew
> cannot be written (strace attached):
For the record, sshd_config.augnew is not a temporary file. This file will be
written with whatever change you make. Augtool man page specifies this
behavior with the '-n' option:
-n Save changes in files with extension '.augnew', do not
modify the original files
> augtool> print /files/etc/ssh/sshd_config/PermitRootLogin
> /files/etc/ssh/sshd_config/PermitRootLogin = "without-password"
> augtool> set /files/etc/ssh/sshd_config/PermitRootLogin without-password
And here, you use a command that actually changes the configuration (well,
usually, not really in this case ...).
> augtool> print /files/etc/ssh/sshd_config/PermitRootLogin
> /files/etc/ssh/sshd_config/PermitRootLogin = "without-password"
> augtool> save
> Saving failed
I guess that Augtool could be improved not to save the file since you did not
actually change its semantic content. But you did ask for a save ...
> Please use a temporary directory for writing temporary files.
[ /me thinks that we'll get similar problems witf config-edit-sshd, but I
digress ... ]
By the way, what happens in your use case if the content of sshd_config is
*actually* changed ? If /etc is read-only, any change will be lost. So what's
the point of using augtool on a read-only file-system ?
All the best
Dominique
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