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Make fd_seek host independent

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This commit is contained in:
Jakub Konka
2019-07-21 09:57:48 +02:00
committed by Dan Gohman
parent 0d571a4e6d
commit 5bbf59e1c5
3 changed files with 13 additions and 31 deletions
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19
src/sys/unix/hostcalls_impl/fs.rs
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@@ -27,25 +27,6 @@ pub(crate) fn fd_pwrite(file: &File, buf: &[u8], offset: host::__wasi_filesize_t
.map_err(|e| e.raw_os_error().map_or(host::__WASI_EIO, errno_from_host))
}
pub(crate) fn fd_seek(
file: &File,
offset: host::__wasi_filedelta_t,
whence: host::__wasi_whence_t,
) -> Result<u64> {
use nix::unistd::{lseek, Whence};
let nwhence = match whence {
host::__WASI_WHENCE_CUR => Whence::SeekCur,
host::__WASI_WHENCE_END => Whence::SeekEnd,
host::__WASI_WHENCE_SET => Whence::SeekSet,
_ => return Err(host::__WASI_EINVAL),
};
match lseek(file.as_raw_fd(), offset, nwhence) {
Ok(offset) => Ok(offset as u64),
Err(e) => Err(host_impl::errno_from_nix(e.as_errno().unwrap())),
}
}
pub(crate) fn fd_tell(file: &File) -> Result<u64> {
use nix::unistd::{lseek, Whence};
match lseek(file.as_raw_fd(), 0, Whence::SeekCur) {