[swift-users] simple i/o on linux with open source swift

Andrey Fidrya af at zabiyaka.com
Sun Jul 17 17:01:06 CDT 2016

High level ones:

let s = try String(contentsOfFile: filename, encoding: .utf8)
try s.write(toFile: filename, atomically: true, encoding: .utf8)

Low level ones:

import Foundation

let fileManager = FileManager.default()

guard let enumerator = fileManager.enumerator(atPath: path) else { fatalError() }
if !fileManager.fileExists(atPath: filename) {
    fileManager.createFile(atPath: filename, contents: nil, attributes: nil)
guard let outFile = FileHandle(forWritingAtPath: filename) else { fatalError() }
defer {

outFile.truncateFile(atOffset: 0)
guard let data = str.data(using: .utf8) else { fatalError() }

This used to work on Linux.


> On 17 Jul 2016, at 02:33, K Richard Pixley via swift-users <swift-users at swift.org> wrote:
> I'm a new swift person, long time unix/linux developer, mac user but only mac developer inasmuch as mac is unix.  I've installed swift on my ubuntu box, written hello world, etc.
> Now... to write much of anything else, I need a way to open/read/write/close a file.  I don't see anything like that in the swift standard library, (aside from print()).  And I don't see anything in the way of documentation for the Core Library.
> How do I do i/o in swift?
> I'm not thinking in terms of "an app", just a simple, read from stdin, write to stdout filter.  How?
> Pointers welcome.
> --rich
> _______________________________________________
> swift-users mailing list
> swift-users at swift.org
> https://lists.swift.org/mailman/listinfo/swift-users

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