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Add basic symlink support.

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- sys$readlink + readlink()
- Add a /proc/PID/exe symlink to the process's executable.
- Print symlink contents in ls output.
- Some work on plumbing options into VFS::open().
This commit is contained in:
Andreas Kling 2018-10-28 14:11:51 +01:00
parent 1d4af51250
commit 97726862dd
20 changed files with 140 additions and 46 deletions
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11
VirtualFileSystem/SyntheticFileSystem.cpp
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@ -60,12 +60,12 @@ auto SyntheticFileSystem::createTextFile(String&& name, String&& text) -> OwnPtr
file->metadata.size = file->data.size();
file->metadata.uid = 100;
file->metadata.gid = 200;
file->metadata.mode = 04;
file->metadata.mode = 0040644;
file->metadata.mtime = mepoch;
return file;
}
auto SyntheticFileSystem::createGeneratedFile(String&& name, Function<ByteBuffer()>&& generator) -> OwnPtr<File>
auto SyntheticFileSystem::createGeneratedFile(String&& name, Function<ByteBuffer()>&& generator, Unix::mode_t mode) -> OwnPtr<File>
{
auto file = make<File>();
file->generator = move(generator);
@ -73,7 +73,7 @@ auto SyntheticFileSystem::createGeneratedFile(String&& name, Function<ByteBuffer
file->metadata.size = 0;
file->metadata.uid = 0;
file->metadata.gid = 0;
file->metadata.mode = 0100644;
file->metadata.mode = mode;
file->metadata.mtime = mepoch;
return file;
}
@ -146,9 +146,8 @@ bool SyntheticFileSystem::enumerateDirectoryInode(InodeIdentifier inode, Functio
callback({ ".", synInode.metadata.inode });
callback({ "..", synInode.parent });
for (auto& child : synInode.children) {
for (auto& child : synInode.children)
callback({ child->name, child->metadata.inode });
}
return true;
}
@ -214,8 +213,8 @@ Unix::ssize_t SyntheticFileSystem::readInodeBytes(InodeIdentifier inode, Unix::o
generatedData = handle->generatorCache();
}
}
auto* data = generatedData ? &generatedData : &file.data;
auto* data = generatedData ? &generatedData : &file.data;
Unix::ssize_t nread = min(static_cast<Unix::off_t>(data->size() - offset), static_cast<Unix::off_t>(count));
memcpy(buffer, data->pointer() + offset, nread);
if (nread == 0 && handle && handle->generatorCache())