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package sysfs
import (
"syscall"
"github.com/tetratelabs/wazero/experimental/sys"
)
func utimens(path string, atim, mtim int64) sys.Errno {
return chtimes(path, atim, mtim)
}
func futimens(fd uintptr, atim, mtim int64) error {
// Per docs, zero isn't a valid timestamp as it cannot be differentiated
// from nil. In both cases, it is a marker like sys.UTIME_OMIT.
// See https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-setfiletime
a, w := timespecToFiletime(atim, mtim)
if a == nil && w == nil {
return nil // both omitted, so nothing to change
}
// Attempt to get the stat by handle, which works for normal files
h := syscall.Handle(fd)
// Note: This returns ERROR_ACCESS_DENIED when the input is a directory.
return syscall.SetFileTime(h, nil, a, w)
}
func timespecToFiletime(atim, mtim int64) (a, w *syscall.Filetime) {
a = timespecToFileTime(atim)
w = timespecToFileTime(mtim)
return
}
func timespecToFileTime(tim int64) *syscall.Filetime {
if tim == sys.UTIME_OMIT {
return nil
}
ft := syscall.NsecToFiletime(tim)
return &ft
}
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