Objective-C MacOS以管理员权限运行程序

在MacOS下很多操作是需要管理员权限的， 比如我们运行chmod，在命令行下可以使用sudo chmod来申请以管理员权限运行。但是使用XCode写的程序是不能使用sudo的。

需要自己写代码来申请权限。下面是一个例子， 以管理员身份运行chmod 777

bool ChmodFileWithElevatedPrivilegesFromLocation(NSString *location)
{
    // Create authorization reference
    OSStatus status;
    AuthorizationRef authorizationRef;

    status = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &authorizationRef);
    if (status != errAuthorizationSuccess)
    {
        NSLog(@"Error Creating Initial Authorization: %d", status);
        return NO;
    }

    AuthorizationItem right = {kAuthorizationRightExecute, 0, NULL, 0};
    AuthorizationRights rights = {1, &right};
    AuthorizationFlags flags = kAuthorizationFlagDefaults | kAuthorizationFlagInteractionAllowed |
    kAuthorizationFlagPreAuthorize | kAuthorizationFlagExtendRights;

    status = AuthorizationCopyRights(authorizationRef, &rights, NULL, flags, NULL);
    if (status != errAuthorizationSuccess)
    {
        NSLog(@"Copy Rights Unsuccessful: %d", status);
        return NO;
    }

    // use chmod
    char *tool = "/bin/chmod";
    char *args[] = {"777", (char *)[location UTF8String], NULL};
    FILE *pipe = NULL;
    status = AuthorizationExecuteWithPrivileges(authorizationRef, tool, kAuthorizationFlagDefaults, args, &pipe);
    if (status != errAuthorizationSuccess)
    {
        NSLog(@"Error: %d", status);
        return NO;
    }

    status = AuthorizationFree(authorizationRef, kAuthorizationFlagDestroyRights);
    return YES;
}

调用方法

bool bRet = ChmodFileWithElevatedPrivilegesFromLocation("/Library");
if(bRet)
{
    NSLog(@"error");
}
else
{
    NSLog(@"sucess");
}

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