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Overlay mount file systems and expose all attributes (resource forks, extended attributes, access lists, owner and group names) as standard files for simply and straight forward file system maintenance.
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whardier/ExposeFS
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ExposeFS ======== Introduction ------------ Say you have a bunch of files on a special filesystem that some giant corporation loves to use for completely insane reasons as well as maintain backwards compatibility with software that should have bit the dust ages ago. Requirements ------------ ExposeFS exposes itself as a POSIX compliant filesystem. That said it expects only one extension to what most would consider a standard POSIX file system which is hard links. The overlay filesystem will appear to have hard links for many nodes including the owner information nodes and acl information nodes. Sparse Files ~~~~~~~~~~~~ Work in progress Caching ------- Memory is used to create inode maps allowing multiple filesystems to be backed up at once while retaining the ability to use hard links for cached information as well as hard links per filesystem. The mapping is simple and inode count starts at 1. In memory the hard links are stored as an integer that relates to a set of two integers, one for the file system ID (0 is reserved for internal uses), and one for the actual inode. Supported Underlaying Filesystems --------------------------------- Common ~~~~~~ This section covers all common information that all supported filesystems should have. - */data (GET/SET) The actual file data - */uid (GET/SET) POSIX UID Number - */gid (GET/SET) POSIX GID ... - */uidname (GET/SET) Resolved user name - */gidname (GET/SET) Resolved group name - */ctime (GET/SET) Creation Timestamp - */atime (GET/SET) Access Timestamp - */mtime (GET/SET) Modify Timestamp - */mode (GET/SET) File mode Supported Underlaying Filesystems (pending): -------------------------------------------- HFS+ ~~~~~~~~ The following are exposed for Mac OS X (tested) HFS+ filesystems. - */acl (GET/SET) ACL - */aclname (GET) Resolved ACL - */rsrc (GET/SET) Resource Fork Contact ------- hardwire on freenode
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Overlay mount file systems and expose all attributes (resource forks, extended attributes, access lists, owner and group names) as standard files for simply and straight forward file system maintenance.
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