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//+build windows
package acl
import (
"os"
"golang.org/x/sys/windows"
)
// Change the permissions of the specified file. Only the nine
// least-significant bytes are used, allowing access by the file's owner, the
// file's group, and everyone else to be explicitly controlled.
func Chmod(name string, fileMode os.FileMode) error {
// https://support.microsoft.com/en-us/help/243330/well-known-security-identifiers-in-windows-operating-systems
creatorOwnerSID, err := windows.StringToSid("S-1-3-0")
if err != nil {
return err
}
creatorGroupSID, err := windows.StringToSid("S-1-3-1")
if err != nil {
return err
}
everyoneSID, err := windows.StringToSid("S-1-1-0")
if err != nil {
return err
}
mode := uint32(fileMode)
return Apply(
name,
true,
false,
GrantSid(((mode&0700)<<23)|((mode&0200)<<9), creatorOwnerSID),
GrantSid(((mode&0070)<<26)|((mode&0020)<<12), creatorGroupSID),
GrantSid(((mode&0007)<<29)|((mode&0002)<<15), everyoneSID),
)
}
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