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package sys
import "syscall"
// These are errors not defined in the syscall package. They are prefixed with
// underscore to avoid exporting them.
//
// See https://learn.microsoft.com/en-us/windows/win32/debug/system-error-codes--0-499-
const (
// _ERROR_INVALID_HANDLE is a Windows error returned by syscall.Write
// instead of syscall.EBADF
_ERROR_INVALID_HANDLE = syscall.Errno(6)
// _ERROR_INVALID_NAME is a Windows error returned by open when a file
// path has a trailing slash
_ERROR_INVALID_NAME = syscall.Errno(0x7B)
// _ERROR_NEGATIVE_SEEK is a Windows error returned by os.Truncate
// instead of syscall.EINVAL
_ERROR_NEGATIVE_SEEK = syscall.Errno(0x83)
// _ERROR_DIRECTORY is a Windows error returned by syscall.Rmdir
// instead of syscall.ENOTDIR
_ERROR_DIRECTORY = syscall.Errno(0x10B)
// _ERROR_INVALID_SOCKET is a Windows error returned by winsock_select
// when a given handle is not a socket.
_ERROR_INVALID_SOCKET = syscall.Errno(0x2736)
)
func errorToErrno(err error) Errno {
switch err := err.(type) {
case Errno:
return err
case syscall.Errno:
// Note: In windows, _ERROR_PATH_NOT_FOUND(0x3) maps to syscall.ENOTDIR
switch err {
case syscall.ERROR_ALREADY_EXISTS:
return EEXIST
case _ERROR_DIRECTORY:
return ENOTDIR
case syscall.ERROR_DIR_NOT_EMPTY:
return ENOTEMPTY
case syscall.ERROR_FILE_EXISTS:
return EEXIST
case _ERROR_INVALID_HANDLE, _ERROR_INVALID_SOCKET:
return EBADF
case syscall.ERROR_ACCESS_DENIED:
// POSIX read and write functions expect EBADF, not EACCES when not
// open for reading or writing.
return EBADF
case syscall.ERROR_PRIVILEGE_NOT_HELD:
return EPERM
case _ERROR_NEGATIVE_SEEK, _ERROR_INVALID_NAME:
return EINVAL
}
errno, _ := syscallToErrno(err)
return errno
default:
return EIO
}
}
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