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-rw-r--r--include/hilbert/kernel/vfile.hpp67
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diff --git a/include/hilbert/kernel/vfile.hpp b/include/hilbert/kernel/vfile.hpp
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--- a/include/hilbert/kernel/vfile.hpp
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-#ifndef HILBERT_KERNEL_VFILE_HPP
-#define HILBERT_KERNEL_VFILE_HPP
-
-#include <hilbert/kernel/storage.hpp>
-#include <hilbert/kernel/utility.hpp>
-
-//TODO: mounts points.
-//maybe a two-way map between mount points and targets? one mount point per
-//target and vice versa. only directories may be mount points, and only file
-//system roots (which must be directories) may be targets.
-
-namespace hilbert::kernel::vfile {
-
- //a canon path contains no . or empty directory names, and
- //contains no .. except for at the start of a relative path.
- struct canon_path {
-
- bool absolute;
- unsigned parent_count;
- utility::vector<utility::string> segments;
-
- canon_path() : absolute(false), parent_count(0), segments(8) {}
-
- void parent();
- void rel(const canon_path &r);
-
- utility::string to_string(bool trailing_slash) const;
-
- };
-
- void canonize_path(const utility::string &name, canon_path &out);
-
- struct vfile {
-
- //on followed symlinks, path is the source of the symlink and the
- //rest of these are the target. in any case, path should be absolute.
- canon_path path;
- storage::block_device *bd;
- storage::dir_entry dir_entry;
-
- //TODO: instead of passing root, use saved mount points.
- storage::fs_result follow_symlinks(
- const vfile &root, std::optional<vfile> &out) const;
-
- //dir_entry.type is assumed to be directory.
- storage::fs_result get_child(
- std::optional<vfile> &out, const utility::string &name) const;
- //dir_entry.type is assumed to be directory. out must be empty on entry.
- storage::fs_result get_children(utility::vector<vfile> &out) const;
-
- //assumes file is a regular file and [start, start + length)
- //is in bounds of file. start and length are in bytes.
- storage::fs_result read_file(
- uint64_t start, uint64_t length, void *into) const;
-
- };
-
- //path must be absolute. follows symlinks on all but the last node.
- //relative_to should be a directory to do the lookup inside; e.g.,
- //if relative_to is /a/b and path is c, then out becomes /a/b/c.
- //TODO: instead of passing root, use saved mount points.
- storage::fs_result lookup_path(
- const vfile &root, const canon_path &path, std::optional<vfile> &out);
-
-}
-
-#endif