Question

我可以使用python从SCDynamicStoreCopyConsoleUser获取用户名，UID和GID：

 #!/usr/bin/python
 from SystemConfiguration import SCDynamicStoreCopyConsoleUser
 cfuser = SCDynamicStoreCopyConsoleUser( None, None, None )
 print cfuser[0] # Returns console user, e.g.: myUsername
 print cfuser[1] # Returns console user’s UID, e.g.: 501
 print cfuser[2] # Returns console user’s GID, e.g.: 20

如何使用Swift获得相同的回报？

SCDynamicStoreCopyConsoleUser的快速声明

 func SCDynamicStoreCopyConsoleUser(_ store: SCDynamicStore!,
                                    _ uid: CMutablePointer<uid_t>,
                                    _ gid: CMutablePointer<gid_t>) -> Unmanaged<CFString>!

我的快速通话

 var uid: CMutablePointer<uid_t>!
 var gid: CMutablePointer<gid_t>!

 var cfuser: NSArray = [SCDynamicStoreCopyConsoleUser(nil,uid,gid)]

 // the return has only one element containing the username

Answer 1

Swift函数SCDynamicStoreCopyConsoleUser采用CMutablePointer<uid_t>参数，这意味着您必须传递uid_t变量的地址。您还应检查呼叫是否成功（否则返回nil），你呢必须转换返回的非托管对象，如中所述 Working with Cocoa Data Types：

import SystemConfiguration

var uid: uid_t = 0
var gid: gid_t = 0

if let theResult = SCDynamicStoreCopyConsoleUser(nil, &uid, &gid) {
    let name = theResult.takeUnretainedValue()
    println("name = \(name), uid = \(uid), gid = \(gid)")
} else {
    println("failed")
}

Swift：如何通过SCDynamicStoreCopyConsoleUser获取控制台用户，UID和GID？

1 个答案: