[pca] PCA return codes

[Martin Paul]

Fred Chagnon wrote:
> In my wrapper script for pca, I would like to be able to determine if pca
> finished patching completely, or if it finished prematurely, perhaps due to
> a patch that required an immediate reconfigure reboot. Does pca have
> different return codes for these situations? Where can I see a list of
> possible exit situations?

I've taken the simple approach now, and at last implemented that in the 
current development release. From "pca --man":

   EXIT STATUS
     The following exit values are returned:

        0  No error
        1  Unknown error
        2  Usage error
        3  Reboot required to continue patch installation
        4  Reboot required
        5  Reboot recommended

That should be enough for most wrapper scripts. The future will tell 
whether more exit values will be needed/added.

Martin.