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Fix mkdir with relative paths.

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This commit is contained in:
Andreas Kling 2018-11-18 23:28:43 +01:00
parent de4604ac95
commit f5a0b6961c
Notes: sideshowbarker 2024-07-19 16:09:48 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/f5a0b6961c9
5 changed files with 49 additions and 185 deletions
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27
AK/FileSystemPath.cpp
View file

@ -30,32 +30,17 @@ bool FileSystemPath::canonicalize(bool resolveSymbolicLinks)
canonicalParts.append(part);
}
if (canonicalParts.isEmpty()) {
m_string = m_basename = m_dirname = "/";
m_string = m_basename = "/";
return true;
}
m_basename = canonicalParts.last();
if (canonicalParts.size() == 1) {
m_dirname = "/";
} else {
StringBuilder builder;
for (size_t i = 0; i < canonicalParts.size() - 1; ++i) {
auto& cpart = canonicalParts[i];
builder.append('/');
builder.append(cpart);
}
m_dirname = builder.build();
}
{
StringBuilder builder;
for (auto& cpart : canonicalParts) {
builder.append('/');
builder.append(move(cpart));
}
m_string = builder.build();
StringBuilder builder;
for (auto& cpart : canonicalParts) {
builder.append('/');
builder.append(move(cpart));
}
m_string = builder.build();
return true;
}

2
AK/FileSystemPath.h
View file

@ -13,13 +13,11 @@ public:
String string() const { return m_string; }
String basename() const { return m_basename; }
String dirname() const { return m_dirname; }
private:
bool canonicalize(bool resolveSymbolicLinks = false);
String m_string;
String m_dirname;
String m_basename;
bool m_isValid { false };
};

2
VirtualFileSystem/Ext2FileSystem.cpp
View file

@ -1011,7 +1011,7 @@ InodeIdentifier Ext2FS::create_inode(InodeIdentifier parentInode, const String&
ASSERT(parentInode.fsid() == id());
ASSERT(isDirectoryInode(parentInode.index()));
dbgprintf("Ext2FS: Adding inode '%s' (mode %o) to parent directory %u:\n", name.characters(), mode, parentInode.index());
dbgprintf("Ext2FS: Adding inode '%s' (mode %u) to parent directory %u:\n", name.characters(), mode, parentInode.index());
// NOTE: This doesn't commit the inode allocation just yet!
auto inode = allocateInode(0, 0);

193
VirtualFileSystem/VirtualFileSystem.cpp
View file

@ -13,10 +13,6 @@
static VFS* s_the;
#ifndef SERENITY
typedef int InterruptDisabler;
#endif
VFS& VFS::the()
{
ASSERT(s_the);
@ -130,11 +126,16 @@ auto VFS::get_or_create_node(CharacterDevice& device) -> RetainPtr<Vnode>
return makeNode(device);
}
InodeIdentifier VFS::root_inode_id() const
{
return m_root_vnode->inode;
}
bool VFS::mount(RetainPtr<FS>&& fileSystem, const String& path)
{
ASSERT(fileSystem);
int error;
auto inode = resolve_path(path, error);
auto inode = resolve_path(path, root_inode_id(), error);
if (!inode.isValid()) {
kprintf("VFS: mount can't resolve mount point '%s'\n", path.characters());
return false;
@ -209,18 +210,6 @@ void VFS::freeNode(Vnode* node)
m_vnode_freelist.append(move(node));
}
#ifndef SERENITY
bool VFS::isDirectory(const String& path, InodeIdentifier base)
{
int error;
auto inode = resolve_path(path, error, base);
if (!inode.isValid())
return false;
return inode.metadata().isDirectory();
}
#endif
auto VFS::find_mount_for_host(InodeIdentifier inode) -> Mount*
{
for (auto& mount : m_mounts) {
@ -263,137 +252,10 @@ void VFS::traverse_directory_inode(CoreInode& dir_inode, Function<bool(const FS:
});
}
#ifndef SERENITY
void VFS::listDirectory(const String& path, InodeIdentifier base)
{
int error;
auto directoryInode = resolve_path(path, error, base);
if (!directoryInode.isValid())
return;
kprintf("VFS: ls %s -> %s %02u:%08u\n", path.characters(), directoryInode.fileSystem()->class_name(), directoryInode.fsid(), directoryInode.index());
enumerateDirectoryInode(directoryInode, [&] (const FileSystem::DirectoryEntry& entry) {
const char* nameColorBegin = "";
const char* nameColorEnd = "";
auto metadata = entry.inode.metadata();
ASSERT(metadata.isValid());
if (metadata.isDirectory()) {
nameColorBegin = "\033[34;1m";
nameColorEnd = "\033[0m";
} else if (metadata.isSymbolicLink()) {
nameColorBegin = "\033[36;1m";
nameColorEnd = "\033[0m";
}
if (metadata.isSticky()) {
nameColorBegin = "\033[42;30m";
nameColorEnd = "\033[0m";
}
if (metadata.isCharacterDevice() || metadata.isBlockDevice()) {
nameColorBegin = "\033[33;1m";
nameColorEnd = "\033[0m";
}
kprintf("%02u:%08u ",
metadata.inode.fsid(),
metadata.inode.index());
if (metadata.isDirectory())
kprintf("d");
else if (metadata.isSymbolicLink())
kprintf("l");
else if (metadata.isBlockDevice())
kprintf("b");
else if (metadata.isCharacterDevice())
kprintf("c");
else if (metadata.isSocket())
kprintf("s");
else if (metadata.isFIFO())
kprintf("f");
else if (metadata.isRegularFile())
kprintf("-");
else
kprintf("?");
kprintf("%c%c%c%c%c%c%c%c",
metadata.mode & 00400 ? 'r' : '-',
metadata.mode & 00200 ? 'w' : '-',
metadata.mode & 00100 ? 'x' : '-',
metadata.mode & 00040 ? 'r' : '-',
metadata.mode & 00020 ? 'w' : '-',
metadata.mode & 00010 ? 'x' : '-',
metadata.mode & 00004 ? 'r' : '-',
metadata.mode & 00002 ? 'w' : '-'
);
if (metadata.isSticky())
kprintf("t");
else
kprintf("%c", metadata.mode & 00001 ? 'x' : '-');
if (metadata.isCharacterDevice() || metadata.isBlockDevice()) {
char buf[16];
ksprintf(buf, "%u, %u", metadata.majorDevice, metadata.minorDevice);
kprintf("%12s ", buf);
} else {
kprintf("%12lld ", metadata.size);
}
kprintf("\033[30;1m");
time_t mtime = metadata.mtime;
auto tm = *klocaltime(&mtime);
kprintf("%04u-%02u-%02u %02u:%02u:%02u ",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
kprintf("\033[0m");
kprintf("%s%s%s",
nameColorBegin,
entry.name,
nameColorEnd);
if (metadata.isDirectory()) {
kprintf("/");
} else if (metadata.isSymbolicLink()) {
auto symlinkContents = directoryInode.fileSystem()->readEntireInode(metadata.inode);
kprintf(" -> %s", String((const char*)symlinkContents.pointer(), symlinkContents.size()).characters());
}
kprintf("\n");
return true;
});
}
void VFS::listDirectoryRecursively(const String& path, InodeIdentifier base)
{
int error;
auto directory = resolve_path(path, error, base);
if (!directory.isValid())
return;
kprintf("%s\n", path.characters());
enumerateDirectoryInode(directory, [&] (const FileSystem::DirectoryEntry& entry) {
auto metadata = entry.inode.metadata();
if (metadata.isDirectory()) {
if (entry.name != "." && entry.name != "..") {
char buf[4096];
ksprintf(buf, "%s/%s", path.characters(), entry.name);
listDirectoryRecursively(buf, base);
}
} else {
kprintf("%s/%s\n", path.characters(), entry.name);
}
return true;
});
}
#endif
bool VFS::touch(const String& path)
{
int error;
auto inode = resolve_path(path, error);
auto inode = resolve_path(path, root_inode_id(), error);
if (!inode.isValid())
return false;
return inode.fileSystem()->set_mtime(inode, ktime(nullptr));
@ -411,7 +273,7 @@ RetainPtr<FileDescriptor> VFS::open(CharacterDevice& device, int options)
RetainPtr<FileDescriptor> VFS::open(const String& path, int& error, int options, InodeIdentifier base)
{
auto inode = resolve_path(path, error, base, options);
auto inode = resolve_path(path, base, error, options);
if (!inode.isValid())
return nullptr;
auto vnode = get_or_create_node(inode);
@ -438,10 +300,24 @@ bool VFS::mkdir(const String& path, mode_t mode, InodeIdentifier base, int& erro
error = -EINVAL;
return false;
}
dbgprintf("VFS::mkdir: '%s' in '%s'\n", p.basename().characters(), p.dirname().characters());
auto parent_dir = resolve_path(p.dirname(), error, m_root_vnode->inode);
if (!parent_dir.isValid())
InodeIdentifier parent_dir;
auto existing_dir = resolve_path(path, base, error, 0, &parent_dir);
if (existing_dir.isValid()) {
kprintf("fug\n");
error = -EEXIST;
return false;
}
if (!parent_dir.isValid()) {
kprintf("fug2\n");
error = -ENOENT;
return false;
}
if (error != -ENOENT) {
kprintf("fug3\n");
return false;
}
dbgprintf("VFS::mkdir: '%s' in %u:%u\n", p.basename().characters(), parent_dir.fsid(), parent_dir.index());
auto new_dir = base.fileSystem()->create_directory(parent_dir, p.basename(), mode, error);
if (new_dir.isValid()) {
error = 0;
@ -459,7 +335,7 @@ InodeIdentifier VFS::resolveSymbolicLink(InodeIdentifier base, InodeIdentifier s
#ifdef VFS_DEBUG
kprintf("linkee (%s)(%u) from %u:%u\n", linkee.characters(), linkee.length(), base.fsid(), base.index());
#endif
return resolve_path(linkee, error, base);
return resolve_path(linkee, base, error);
}
RetainPtr<CoreInode> VFS::get_inode(InodeIdentifier inode_id)
@ -482,7 +358,7 @@ String VFS::absolute_path(CoreInode& core_inode)
InodeIdentifier parent_id;
if (inode->is_directory()) {
parent_id = resolve_path("..", error, inode->identifier());
parent_id = resolve_path("..", inode->identifier(), error);
} else {
parent_id = inode->fs().find_parent_of_inode(inode->identifier());
}
@ -505,10 +381,12 @@ String VFS::absolute_path(CoreInode& core_inode)
return builder.build();
}
InodeIdentifier VFS::resolve_path(const String& path, int& error, InodeIdentifier base, int options)
InodeIdentifier VFS::resolve_path(const String& path, InodeIdentifier base, int& error, int options, InodeIdentifier* deepest_dir)
{
if (path.isEmpty())
if (path.isEmpty()) {
error = -EINVAL;
return { };
}
auto parts = path.split('/');
InodeIdentifier crumb_id;
@ -518,6 +396,9 @@ InodeIdentifier VFS::resolve_path(const String& path, int& error, InodeIdentifie
else
crumb_id = base.isValid() ? base : m_root_vnode->inode;
if (deepest_dir)
*deepest_dir = crumb_id;
for (unsigned i = 0; i < parts.size(); ++i) {
bool inode_was_root_at_head_of_loop = crumb_id.isRootInode();
auto& part = parts[i];
@ -535,7 +416,7 @@ InodeIdentifier VFS::resolve_path(const String& path, int& error, InodeIdentifie
#ifdef VFS_DEBUG
kprintf("parent of <%s> not directory, it's inode %u:%u / %u:%u, mode: %u, size: %u\n", part.characters(), inode.fsid(), inode.index(), metadata.inode.fsid(), metadata.inode.index(), metadata.mode, metadata.size);
#endif
error = -EIO;
error = -ENOTDIR;
return { };
}
auto parent = crumb_id;
@ -566,6 +447,10 @@ InodeIdentifier VFS::resolve_path(const String& path, int& error, InodeIdentifie
crumb_id = dir_inode->lookup("..");
}
metadata = crumb_id.metadata();
if (metadata.isDirectory()) {
if (deepest_dir)
*deepest_dir = crumb_id;
}
if (metadata.isSymbolicLink()) {
if (i == parts.size() - 1) {
if (options & O_NOFOLLOW) {

10
VirtualFileSystem/VirtualFileSystem.h
View file

@ -98,12 +98,6 @@ public:
VFS();
~VFS();
#ifndef SERENITY
bool isDirectory(const String& path, InodeIdentifier base = InodeIdentifier());
void listDirectory(const String& path, InodeIdentifier base);
void listDirectoryRecursively(const String& path, InodeIdentifier base);
#endif
unsigned max_vnode_count() const { return m_max_vnode_count; }
unsigned allocated_vnode_count() const { return m_max_vnode_count - m_vnode_freelist.size(); }
@ -127,6 +121,8 @@ public:
String absolute_path(CoreInode&);
InodeIdentifier root_inode_id() const;
private:
friend class FileDescriptor;
friend class Vnode;
@ -136,7 +132,7 @@ private:
bool is_vfs_root(InodeIdentifier) const;
void traverse_directory_inode(CoreInode&, Function<bool(const FS::DirectoryEntry&)>);
InodeIdentifier resolve_path(const String& path, int& error, InodeIdentifier base = InodeIdentifier(), int options = 0);
InodeIdentifier resolve_path(const String& path, InodeIdentifier base, int& error, int options = 0, InodeIdentifier* deepest_dir = nullptr);
InodeIdentifier resolveSymbolicLink(InodeIdentifier base, InodeIdentifier symlinkInode, int& error);
RetainPtr<Vnode> allocateNode();