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Disable use of linkat on Android as well.

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According to [the bionic status page], `linkat` has only been available
since API level 21. Since Android is based on Linux and Linux's `link`
doesn't follow symlinks, just use `link` on Android.

[the bionic status page]: https://android.googlesource.com/platform/bionic/+/master/docs/status.md
This commit is contained in:
Dan Gohman 2020-10-23 15:39:02 -07:00
parent d0178b4f99
commit 6249cda78f
1 changed files with 5 additions and 5 deletions
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10
library/std/src/sys/unix/fs.rs
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@ -1068,11 +1068,11 @@ pub fn link(src: &Path, dst: &Path) -> io::Result<()> {
let src = cstr(src)?;
let dst = cstr(dst)?;
cfg_if::cfg_if! {
if #[cfg(any(target_os = "vxworks", target_os = "redox"))] {
// VxWorks and Redox lack `linkat`, so use `link` instead. POSIX
// leaves it implementation-defined whether `link` follows symlinks,
// so rely on the `symlink_hard_link` test in
// library/std/src/fs/tests.rs to check the behavior.
if #[cfg(any(target_os = "vxworks", target_os = "redox", target_os = "android"))] {
// VxWorks, Redox, and old versions of Android lack `linkat`, so use
// `link` instead. POSIX leaves it implementation-defined whether
// `link` follows symlinks, so rely on the `symlink_hard_link` test
// in library/std/src/fs/tests.rs to check the behavior.
cvt(unsafe { libc::link(src.as_ptr(), dst.as_ptr()) })?;
} else {
// Use `linkat` with `AT_FDCWD` instead of `link` as `linkat` gives