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J-rg
67 lines
3.1 KiB
Swift
67 lines
3.1 KiB
Swift
// Copyright (c) 2020, OpenEmu Team
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the OpenEmu Team nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY OpenEmu Team ''AS IS'' AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL OpenEmu Team BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import Foundation
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public extension FileManager {
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/// Returns a boolean value that indicates whether the path has an extended attribute of the given name.
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///
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/// - Parameters:
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/// - name: The name of the extended attribute.
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/// - path: The path of a file or directory.
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/// - follow: Specify `true` to follow symbolic links.
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///
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/// - Returns: A value indicating whether the item has an extended attribute of the given name.
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/// - Throws: `POSIXError` if `getxattr` fails.
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func hasExtendedAttribute(_ name: String, at url: URL, traverseLink follow: Bool) throws -> Bool {
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let flags = follow ? 0 : XATTR_NOFOLLOW
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guard getxattr((url as NSURL).fileSystemRepresentation, name, nil, 0, 0, flags) != -1 else {
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switch errno {
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case ENOATTR:
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return false
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default:
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throw POSIXError(POSIXErrorCode(rawValue: errno)!)
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}
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}
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return true
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}
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/// Removes the extended attribute for the given file or directory.
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///
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/// - Parameters:
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/// - name: The name of the extended attribute.
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/// - path: The path of a file or directory.
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/// - follow: Specify `true` to follow symbolic links.
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///
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/// - Throws: `PosixError` if `removexattr` fails.
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func removeExtendedAttribute(_ name: String, at url: URL, traverseLink follow: Bool) throws {
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let flags = follow ? 0 : XATTR_NOFOLLOW
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if removexattr((url as NSURL).fileSystemRepresentation, name, flags) == 0 {
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return
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}
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throw POSIXError(POSIXErrorCode(rawValue: errno)!)
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}
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}
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