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Fix std::fs::copy on WASI target #69106

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Merged
merged 1 commit into from
Feb 15, 2020
Merged

Fix std::fs::copy on WASI target #69106

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10 changes: 9 additions & 1 deletion src/libstd/sys/wasi/fs.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@ use crate::sys::time::SystemTime;
use crate::sys::unsupported;
use crate::sys_common::FromInner;

pub use crate::sys_common::fs::copy;
pub use crate::sys_common::fs::remove_dir_all;

pub struct File {
Expand Down Expand Up @@ -647,3 +646,12 @@ fn open_parent(p: &Path) -> io::Result<(ManuallyDrop<WasiFd>, PathBuf)> {
pub fn osstr2str(f: &OsStr) -> io::Result<&str> {
f.to_str().ok_or_else(|| io::Error::new(io::ErrorKind::Other, "input must be utf-8"))
}

pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
use crate::fs::File;

let mut reader = File::open(from)?;
let mut writer = File::create(to)?;

io::copy(&mut reader, &mut writer)
}