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ff610469fb
Don't assume that if guestfs_case_sensitive_path returns NULL, that it means the file does not exist. The (previously undefined) behaviour of case_sensitive_path was that a NULL return meant "either the file doesn't exist or some other error". However in commit973581780dthis was changed so that if the last element of the path didn't exist, it was assumed to be a new file and the (non-NULL) path of the new file is returned. This change breaks code (including in libguestfs) which tries to use case_sensitive_path as a dual-purpose call to fix-up a path for Windows and test if the file exists. Such code should be rewritten so that it explicitly tests for file existence after calling case_sensitive_path. I examined all the calls to case_sensitive_path in libguestfs and modified them where necessary. Cherry picked from commit9ea6e97014.