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// This file is part of linux-support. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT. No part of linux-support, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2020 The developers of linux-support. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT.
/// Read, write or read-write.
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum Access
{
/// Read only.
ReadOnly(ReadAccessTimeUpdating),
/// Write only.
WriteOnly(WriteSynchronization),
/// Append only.
AppendOnly(WriteSynchronization),
/// Write only; truncate length to zero if the file exists.
///
/// Only effective for a regular file.
/// Ignored for FIFOs and terminal character devices.
/// Unspecified for other file types but may cause an error.
WriteOnlyTruncate(WriteSynchronization),
/// Append only; truncate length to zero if the file exists.
///
/// Only effective for a regular file.
/// Ignored for FIFOs and terminal character devices.
/// Unspecified for other file types but may cause an error.
AppendOnlyTruncate(WriteSynchronization),
/// Read and write.
ReadWrite(ReadAccessTimeUpdating, WriteSynchronization),
/// Read and write; truncate length to zero if the file exists.
///
/// Only effective for a regular file.
/// Ignored for FIFOs and terminal character devices.
/// Unspecified for other file types but may cause an error.
ReadWriteTruncate(ReadAccessTimeUpdating, WriteSynchronization),
/// Read and append.
ReadAppend(ReadAccessTimeUpdating, WriteSynchronization),
/// Read and append; truncate length to zero if the file exists.
///
/// Only effective for a regular file.
/// Ignored for FIFOs and terminal character devices.
/// Unspecified for other file types but may cause an error.
ReadAppendTruncate(ReadAccessTimeUpdating, WriteSynchronization),
}
impl Access
{
#[inline(always)]
pub(crate) fn to_oflag(self) -> i32
{
use self::Access::*;
match self
{
ReadOnly(read_access_time_updating) => O_RDONLY | read_access_time_updating as i32,
WriteOnly(write_synchronization) => O_WRONLY | write_synchronization as i32,
AppendOnly(write_synchronization) => O_WRONLY | O_APPEND | write_synchronization as i32,
WriteOnlyTruncate(write_synchronization) => O_WRONLY | O_TRUNC | write_synchronization as i32,
AppendOnlyTruncate(write_synchronization) => O_WRONLY | O_APPEND | O_TRUNC | write_synchronization as i32,
ReadWrite(read_access_time_updating, write_synchronization) => O_RDWR | read_access_time_updating as i32 | write_synchronization as i32,
ReadWriteTruncate(read_access_time_updating, write_synchronization) => O_RDWR | O_TRUNC | read_access_time_updating as i32 | write_synchronization as i32,
ReadAppend(read_access_time_updating, write_synchronization) => O_RDWR | O_APPEND | read_access_time_updating as i32 | write_synchronization as i32,
ReadAppendTruncate(read_access_time_updating, write_synchronization) => O_RDWR | O_APPEND | O_TRUNC | read_access_time_updating as i32 | write_synchronization as i32,
}
}
}