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LibWasm/WASI: Add support for fd_fdstat_get()

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(cherry picked from commit 708abf6bb11c813ab6ed80df509f73e6f612965e)
This commit is contained in:
Ali Mohammad Pur 2024-07-16 17:48:33 +02:00 committed by Ali Mohammad Pur
parent 22f9386ab6
commit a07ce3c8c6
1 changed files with 61 additions and 1 deletions
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62
Userland/Libraries/LibWasm/WASI/Wasi.cpp
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@ -313,6 +313,8 @@ static ErrorOr<size_t> copy_string_excluding_terminating_null(Configuration& con
}
static Errno errno_value_from_errno(int value);
static FileType file_type_of(struct stat const& buf);
static FDFlags fd_flags_of(struct stat const& buf);
Vector<AK::String> const& Implementation::arguments() const
{
@ -778,6 +780,38 @@ ErrorOr<Result<Size>> Implementation::impl$fd_read(Configuration& configuration,
return bytes_read;
}
ErrorOr<Result<FDStat>> Implementation::impl$fd_fdstat_get(Configuration&, FD fd)
{
auto mapped_fd = map_fd(fd);
auto resolved_fd = -1;
mapped_fd.visit(
[&](PreopenedDirectoryDescriptor descriptor) {
auto& entry = preopened_directories()[descriptor.value()];
resolved_fd = entry.opened_fd.value_or_lazy_evaluated([&] {
ByteString path = entry.host_path.string();
return open(path.characters(), O_DIRECTORY, 0);
});
entry.opened_fd = resolved_fd;
},
[&](u32 fd) {
resolved_fd = fd;
},
[](UnmappedDescriptor) {});
if (resolved_fd < 0)
return errno_value_from_errno(errno);
struct stat stat_buf;
if (fstat(resolved_fd, &stat_buf) < 0)
return errno_value_from_errno(errno);
return FDStat {
.fs_filetype = file_type_of(stat_buf),
.fs_flags = fd_flags_of(stat_buf),
.fs_rights_base = Rights { .data = 0 },
.fs_rights_inheriting = Rights { .data = 0 },
};
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
@ -788,7 +822,6 @@ ErrorOr<Result<Timestamp>> Implementation::impl$clock_res_get(Configuration&, Cl
ErrorOr<Result<void>> Implementation::impl$fd_advise(Configuration&, FD, FileSize offset, FileSize len, Advice) { return Errno::NoSys; }
ErrorOr<Result<void>> Implementation::impl$fd_allocate(Configuration&, FD, FileSize offset, FileSize len) { return Errno::NoSys; }
ErrorOr<Result<void>> Implementation::impl$fd_datasync(Configuration&, FD) { return Errno::NoSys; }
ErrorOr<Result<FDStat>> Implementation::impl$fd_fdstat_get(Configuration&, FD) { return Errno::NoSys; }
ErrorOr<Result<void>> Implementation::impl$fd_fdstat_set_flags(Configuration&, FD, FDFlags) { return Errno::NoSys; }
ErrorOr<Result<void>> Implementation::impl$fd_fdstat_set_rights(Configuration&, FD, Rights fs_rights_base, Rights fs_rights_inheriting) { return Errno::NoSys; }
ErrorOr<Result<void>> Implementation::impl$fd_filestat_set_size(Configuration&, FD, FileSize) { return Errno::NoSys; }
@ -1123,6 +1156,33 @@ Errno errno_value_from_errno(int value)
return Errno::Invalid;
}
}
FileType file_type_of(struct stat const& buf)
{
switch (buf.st_mode & S_IFMT) {
case S_IFDIR:
return FileType::Directory;
case S_IFCHR:
return FileType::CharacterDevice;
case S_IFBLK:
return FileType::BlockDevice;
case S_IFREG:
return FileType::RegularFile;
case S_IFIFO:
return FileType::Unknown; // FIXME: FileType::Pipe is currently not present in WASI (but it should be) so we use Unknown for now.
case S_IFLNK:
return FileType::SymbolicLink;
case S_IFSOCK:
return FileType::SocketStream;
default:
return FileType::Unknown;
}
}
FDFlags fd_flags_of(struct stat const&)
{
FDFlags::Bits result {};
return FDFlags { result };
}
}
namespace AK {