SystemInfo.swift

internal struct SystemInfo {
    let sysname: String
    let nodename: String
    let release: String
    let version: String
    let machine: String

    init() {
        var info: utsname = utsname()
        let status = withUnsafeMutablePointer(to: &info) {
            return uname($0)
        }
        guard status == 0 else {
            self.sysname = "unknown"
            self.nodename = "unknown"
            self.release = "unknown"
            self.version = "unknown"
            self.machine = "unknown"
            return
        }
        do {
            var tmp = info.sysname
            let bytes = [Int8](UnsafeBufferPointer(start: &tmp.0, count: MemoryLayout.size(ofValue: tmp)))
            self.sysname = String(cString: bytes)
        }
        do {
            var tmp = info.nodename
            let bytes = [Int8](UnsafeBufferPointer(start: &tmp.0, count: MemoryLayout.size(ofValue: tmp)))
            self.nodename = String(cString: bytes)
        }
        do {
            var tmp = info.release
            let bytes = [Int8](UnsafeBufferPointer(start: &tmp.0, count: MemoryLayout.size(ofValue: tmp)))
            self.release = String(cString: bytes)
        }
        do {
            var tmp = info.version
            let bytes = [Int8](UnsafeBufferPointer(start: &tmp.0, count: MemoryLayout.size(ofValue: tmp)))
            self.version = String(cString: bytes)
        }
        do {
            var tmp = info.machine
            let bytes = [Int8](UnsafeBufferPointer(start: &tmp.0, count: MemoryLayout.size(ofValue: tmp)))
            self.machine = String(cString: bytes)
        }
    }
}