feat: sync APIs for more platforms (#2379)

Author: SteveLauC

changelog/2379.added.md

@@ -0,0 +1 @@
+Add `sync(2)` for `apple_targets/solarish/haiku/aix/hurd`, `syncfs(2)` for `hurd` and `fdatasync(2)` for `aix/hurd`

src/unistd.rs

@@ -1377,7 +1377,7 @@ pub fn chroot<P: ?Sized + NixPath>(path: &P) -> Result<()> {
 /// Commit filesystem caches to disk
 ///
 /// See also [sync(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/sync.html)
-#[cfg(any(freebsdlike, linux_android, netbsdlike))]
+#[cfg(any(bsd, linux_android, solarish, target_os = "haiku", target_os = "aix", target_os = "hurd"))]
 pub fn sync() {
     unsafe { libc::sync() };
 }
@@ -1386,7 +1386,7 @@ pub fn sync() {
 /// descriptor `fd` to disk
 ///
 /// See also [syncfs(2)](https://man7.org/linux/man-pages/man2/sync.2.html)
-#[cfg(linux_android)]
+#[cfg(any(linux_android, target_os = "hurd"))]
 pub fn syncfs(fd: RawFd) -> Result<()> {
     let res = unsafe { libc::syncfs(fd) };
 
@@ -1414,6 +1414,8 @@ pub fn fsync(fd: RawFd) -> Result<()> {
     target_os = "freebsd",
     target_os = "emscripten",
     target_os = "fuchsia",
+    target_os = "aix",
+    target_os = "hurd",
 ))]
 #[inline]
 pub fn fdatasync(fd: RawFd) -> Result<()> {