path_link test: we no longer support symlink following

just assert that setting the symlink following lookupflag gives an
ERRNO_INVAL.

crates/test-programs/TEST_FAILURES

@@ -4,11 +4,8 @@ TODOs:
   fcntl on unix, reopenfile / require reopening on windows.
 
 
-
 # Linux
 
-* path_link
-    - need DirExt::hard_link that follows symlinks.
 * path_rename_trailing_slashes
     - trailing slash behavior of files is wrong: trailing slashes are ignored,
       should cause an error.
@@ -40,8 +37,7 @@ TODOs:
     - permission denied on windows to rename a dir to an existing empty dir
 
 * path_link
-    - fails on the first dangling symlink, which is before the hard_link
-      following symlinks issue linux hits.
+    - fails on the first dangling symlink
 
 ## "Trailing slashes are a bonified boondoggle" - Dan
 

crates/test-programs/wasi-tests/src/bin/path_link.rs

@@ -184,25 +184,10 @@ unsafe fn test_path_link(dir_fd: wasi::Fd) {
     );
     wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
 
-    // Create a link to a file following symlinks
-    wasi::path_symlink("file", dir_fd, "symlink").expect("creating a valid symlink");
-    wasi::path_link(
-        dir_fd,
-        wasi::LOOKUPFLAGS_SYMLINK_FOLLOW,
-        "symlink",
-        dir_fd,
-        "link",
-    )
-    .expect("creating a link to a file following symlinks");
-    let link_fd = open_link(dir_fd, "link");
-    check_rights(file_fd, link_fd);
-    wasi::path_unlink_file(dir_fd, "link").expect("removing a link");
-    wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
-
     // Create a link where target is a dangling symlink following symlinks
     wasi::path_symlink("target", dir_fd, "symlink").expect("creating a dangling symlink");
 
-    // If we do follow symlinks, this should fail
+    // Symlink following with path_link is rejected
     assert_eq!(
         wasi::path_link(
             dir_fd,
@@ -211,30 +196,11 @@ unsafe fn test_path_link(dir_fd: wasi::Fd) {
             dir_fd,
             "link",
         )
-        .expect_err("creating a link to a dangling symlink following symlinks should fail")
+        .expect_err("calling path_link with LOOKUPFLAGS_SYMLINK_FOLLOW should fail")
         .raw_error(),
-        wasi::ERRNO_NOENT,
-        "errno should be ERRNO_NOENT"
+        wasi::ERRNO_INVAL,
+        "errno should be ERRNO_INVAL"
     );
-    wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
-
-    // Create a link to a symlink loop following symlinks
-    wasi::path_symlink("symlink", dir_fd, "symlink").expect("creating a symlink loop");
-
-    assert_eq!(
-        wasi::path_link(
-            dir_fd,
-            wasi::LOOKUPFLAGS_SYMLINK_FOLLOW,
-            "symlink",
-            dir_fd,
-            "link",
-        )
-        .expect_err("creating a link to a symlink loop following symlinks")
-        .raw_error(),
-        wasi::ERRNO_LOOP,
-        "errno should be ERRNO_LOOP"
-    );
-    wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
 
     // Clean up.
     wasi::path_unlink_file(dir_fd, "file").expect("removing a file");