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Kernel: add O_TRUNC 

this is not supported by anything yet
This commit is contained in:
Bananymous 2023-07-10 15:48:18 +03:00
parent 2276fc95b8
commit 65fa05f998
2 changed files with 6 additions and 1 deletions
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2
kernel/include/kernel/FS/Inode.h
View File

@ -87,6 +87,8 @@ namespace Kernel
virtual BAN::ErrorOr<size_t> read(size_t, void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<size_t> write(size_t, const void*, size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); ASSERT_NOT_REACHED(); }
virtual BAN::ErrorOr<void> truncate(size_t) { if (mode().ifdir()) return BAN::Error::from_errno(EISDIR); return BAN::Error::from_errno(ENOTSUP); }
virtual BAN::ErrorOr<void> create_file(BAN::StringView, mode_t, uid_t, gid_t) { if (!mode().ifdir()) return BAN::Error::from_errno(ENOTDIR); ASSERT_NOT_REACHED(); }
};

5
kernel/kernel/OpenFileDescriptorSet.cpp
View File

@ -49,11 +49,14 @@ namespace Kernel
BAN::ErrorOr<int> OpenFileDescriptorSet::open(BAN::StringView absolute_path, int flags)
{
if (flags & ~(O_RDONLY | O_WRONLY | O_NOFOLLOW | O_SEARCH | O_APPEND | O_CLOEXEC))
if (flags & ~(O_RDONLY | O_WRONLY | O_NOFOLLOW | O_SEARCH | O_APPEND | O_TRUNC | O_CLOEXEC))
return BAN::Error::from_errno(ENOTSUP);
auto file = TRY(VirtualFileSystem::get().file_from_absolute_path(m_credentials, absolute_path, flags));
if (flags & O_TRUNC)
TRY(file.inode->truncate(0));
int fd = TRY(get_free_fd());
m_open_files[fd] = TRY(BAN::RefPtr<OpenFileDescription>::create(file.inode, BAN::move(file.canonical_path), 0, flags));