Use flink to implement link on redox

Cargo.lock

@@ -90,9 +90,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.40"
+version = "0.4.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a7964611d71df112cb1730f2ee67324fcf4d0fc6606acbbe9bfe06df124637c"
+checksum = "c469d952047f47f91b68d1cba3f10d63c11d73e4636f24f08daf0278abf01c4d"
 dependencies = [
  "num-traits",
 ]
@@ -233,9 +233,9 @@ checksum = "d750af042f7ef4f724306de029d18836c26c1765a54a6a3f094cbd23a7267ffa"
 
 [[package]]
 name = "libm"
-version = "0.2.11"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8355be11b20d696c8f18f6cc018c4e372165b1fa8126cef092399c9951984ffa"
+checksum = "c9627da5196e5d8ed0b0495e61e518847578da83483c37288316d9b2e03a7f72"
 
 [[package]]
 name = "libredox"
@@ -457,8 +457,8 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.11"
-source = "git+https://gitlab.redox-os.org/redox-os/syscall.git?branch=master#8f646a63ac9c3aa532a37ddfdc136ec19878f0d6"
+version = "0.5.12"
+source = "git+https://gitlab.redox-os.org/redox-os/syscall.git?branch=master#fe32c6b89dae51e609d5c53880dec1834ec9bde0"
 dependencies = [
  "bitflags",
 ]
@@ -593,9 +593,9 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.10.8"
+version = "0.10.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -631,9 +631,9 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
 [[package]]
 name = "syn"
-version = "2.0.100"
+version = "2.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+checksum = "8ce2b7fc941b3a24138a0a7cf8e858bfc6a992e7978a068a5c760deb0ed43caf"
 dependencies = [
  "proc-macro2",
  "quote",

Cargo.toml

@@ -61,7 +61,7 @@ features = ["c_api"]
 sc = "0.2.3"
 
 [target.'cfg(target_os = "redox")'.dependencies]
-redox_syscall = "0.5.11"
+redox_syscall = "0.5.12"
 redox-rt = { path = "redox-rt" }
 redox-path = "0.2"
 redox_event = { git = "https://gitlab.redox-os.org/redox-os/event.git", default-features = false, features = [

src/platform/redox/mod.rs

@@ -578,8 +578,11 @@ impl Pal for Sys {
         Self::fchown(*file, owner, group)
     }
 
-    fn link(path1: CStr, path2: CStr) -> Result<()> {
-        unsafe { syscall::link(path1.as_ptr() as *const u8, path2.as_ptr() as *const u8)? };
+    fn link(oldpath: CStr, newpath: CStr) -> Result<()> {
+        let newpath = newpath.to_str().map_err(|_| Errno(EINVAL))?;
+
+        let file = File::open(oldpath, fcntl::O_PATH | fcntl::O_CLOEXEC)?;
+        syscall::flink(*file as usize, newpath)?;
         Ok(())
     }