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//go:build !tinygo
package sysfs
import (
"io/fs"
"os"
"path"
experimentalsys "github.com/tetratelabs/wazero/experimental/sys"
)
// Link implements the same method as documented on sys.FS
func (d *dirFS) Link(oldName, newName string) experimentalsys.Errno {
err := os.Link(d.join(oldName), d.join(newName))
return experimentalsys.UnwrapOSError(err)
}
// Unlink implements the same method as documented on sys.FS
func (d *dirFS) Unlink(path string) (err experimentalsys.Errno) {
return unlink(d.join(path))
}
// Rename implements the same method as documented on sys.FS
func (d *dirFS) Rename(from, to string) experimentalsys.Errno {
from, to = d.join(from), d.join(to)
return rename(from, to)
}
// Chmod implements the same method as documented on sys.FS
func (d *dirFS) Chmod(path string, perm fs.FileMode) experimentalsys.Errno {
err := os.Chmod(d.join(path), perm)
return experimentalsys.UnwrapOSError(err)
}
// Symlink implements the same method as documented on sys.FS
func (d *dirFS) Symlink(oldName, link string) experimentalsys.Errno {
// Creating a symlink with an absolute path string fails with a "not permitted" error.
// https://github.com/WebAssembly/wasi-filesystem/blob/v0.2.0/path-resolution.md#symlinks
if path.IsAbs(oldName) {
return experimentalsys.EPERM
}
// Note: do not resolve `oldName` relative to this dirFS. The link result is always resolved
// when dereference the `link` on its usage (e.g. readlink, read, etc).
// https://github.com/bytecodealliance/cap-std/blob/v1.0.4/cap-std/src/fs/dir.rs#L404-L409
err := os.Symlink(oldName, d.join(link))
return experimentalsys.UnwrapOSError(err)
}
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