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sys_fs: Implemented sys_fs_mount(prot=1) read-only mounting & fixed up some operation and permission checks

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brian218 2023-05-25 14:31:17 +08:00 • committed by kd-11
parent 5e6aa45658
commit 6a570ae57e
6 changed files with 183 additions and 212 deletions
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54
Utilities/File.cpp
View file

@ -3,6 +3,7 @@
#include "StrFmt.h"
#include "Crypto/sha1.h"
#include <filesystem>
#include <unordered_map>
#include <algorithm>
#include <cstring>
@ -384,55 +385,26 @@ shared_ptr<fs::device_base> fs::set_virtual_device(const std::string& name, shar
return get_device_manager().set_device(name, std::move(device));
}
std::string fs::get_parent_dir(std::string_view path, u32 levels)
std::string fs::get_parent_dir(std::string_view path, u32 parent_level)
{
std::string_view result = path;
std::string normalized_path = std::filesystem::path(path).lexically_normal().string();
// Number of path components to remove
usz to_remove = levels;
#ifdef _WIN32
std::replace(normalized_path.begin(), normalized_path.end(), '\\', '/');
#endif
while (to_remove--)
if (normalized_path.back() == '/')
normalized_path.pop_back();
while (parent_level--)
{
// Trim contiguous delimiters at the end
if (usz sz = result.find_last_not_of(delim) + 1)
{
result = result.substr(0, sz);
}
if (const auto pos = normalized_path.find_last_of('/'); pos != umax)
normalized_path = normalized_path.substr(0, pos);
else
{
return "/";
}
const auto elem = result.substr(result.find_last_of(delim) + 1);
if (elem.empty() || elem.size() == result.size())
{
break;
}
if (elem == ".")
{
to_remove += 1;
}
if (elem == "..")
{
to_remove += 2;
}
result.remove_suffix(elem.size());
}
if (usz sz = result.find_last_not_of(delim) + 1)
{
result = result.substr(0, sz);
}
else
{
return "/";
}
return std::string{result};
return normalized_path.empty() ? "/" : normalized_path;
}
bool fs::stat(const std::string& path, stat_t& info)

4
Utilities/File.h
View file

@ -165,8 +165,8 @@ namespace fs
// Set virtual device with specified name (nullptr for deletion)
shared_ptr<device_base> set_virtual_device(const std::string& name, shared_ptr<device_base> device);
// Try to get parent directory (returns empty string on failure)
std::string get_parent_dir(std::string_view path, u32 levels = 1);
// Try to get normalized parent directory
std::string get_parent_dir(std::string_view path, u32 parent_level = 1);
// Get file information
bool stat(const std::string& path, stat_t& info);