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authorBenji Dial <benji@benjidial.net>2024-01-15 15:44:20 -0500
committerBenji Dial <benji@benjidial.net>2024-01-15 15:44:20 -0500
commitc9a1266d219a83882735a3a8304f3824e0219cdb (patch)
treefea71a0b5b0de8f3a8962dc6ed417273f231e2a9 /include/mercury/kernel/vfile.hpp
parent7c6a18d77a81f232ad2e1d3a311bb21ea8f1f5b4 (diff)
downloadhilbert-os-c9a1266d219a83882735a3a8304f3824e0219cdb.tar.gz
redo application paging and system calls, rename mercury to hilbert
Diffstat (limited to 'include/mercury/kernel/vfile.hpp')
-rw-r--r--include/mercury/kernel/vfile.hpp67
1 files changed, 0 insertions, 67 deletions
diff --git a/include/mercury/kernel/vfile.hpp b/include/mercury/kernel/vfile.hpp
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--- a/include/mercury/kernel/vfile.hpp
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-#ifndef MERCURY_KERNEL_VFILE_HPP
-#define MERCURY_KERNEL_VFILE_HPP
-
-#include <mercury/kernel/storage.hpp>
-#include <mercury/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 mercury::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