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2010-07-18fix other 2 cases of conflicting destdir filesJoey Hess
Cleanly fixed case where destdir file failed to be written because there was a directory with the same name. This can be detected with no extra system calls, and dealt with by finding all pages that wrote files inside the directory, and removing them and the directory. The other, inverse case would be expensive to detect in will_render, since it would need to check each parent directory of the file to see if the directory is really a conflicting file. But prep_writefile already does a similar scan for symlinks in the path, so I added code there to remove the conflicting file. This fix assumes that the file is written using writefile, and not some other means (but using other means would be a security hole too, so hopefully nothing does).
2010-07-18class of bugs I am working onJoey Hess