public void InitializeAsyncLocks()
{
CreateAndCloseLockFile();
uint groupId = (uint)Mono.Unix.Native.Syscall.getgrnam(System.Environment.GetEnvironmentVariable("KUDU_RUN_USER")).gr_gid;
//
// chown the file file
//
Mono.Unix.Native.Syscall.chown(_lockFile, Mono.Unix.Native.Syscall.getuid(), groupId);
//
// setup permissions 770 on the file.
//
Mono.Unix.Native.FilePermissions permissions =
Mono.Unix.Native.FilePermissions.S_IRWXU |
Mono.Unix.Native.FilePermissions.S_IRGRP |
Mono.Unix.Native.FilePermissions.S_IWGRP |
Mono.Unix.Native.FilePermissions.S_IXGRP;
//
// chmod the file.
//
Mono.Unix.Native.Syscall.chmod(_lockFile, permissions);
}
/*
* ~FileRWLock()
* {
* if (_fd != 0)
* {
* Mono.Unix.Native.Syscall.close(_fd);
* _fd = 0;
* }
* }
*/
public void InitializeAsyncLocks()
{
//
// Create the file.
//
int fd = Mono.Unix.Native.Syscall.open(
_lockFile,
Mono.Unix.Native.OpenFlags.O_CREAT | Mono.Unix.Native.OpenFlags.O_WRONLY | Mono.Unix.Native.OpenFlags.O_APPEND | Mono.Unix.Native.OpenFlags.O_NONBLOCK,
FilePermissions.ACCESSPERMS);
if (fd == -1)
{
Errno error = Mono.Unix.Native.Syscall.GetLastError();
throw new Exception("FileRWLock: file open returned: " + error.ToString());
}
_fd = fd;
//
// close the file.
//
Mono.Unix.Native.Syscall.close(fd);
uint groupId = (uint)Mono.Unix.Native.Syscall.getgrnam("kudu_group").gr_gid;
//
// chown the file file
//
Mono.Unix.Native.Syscall.chown(_lockFile, Mono.Unix.Native.Syscall.getuid(), groupId);
//
// setup permissions 770 on the file.
//
Mono.Unix.Native.FilePermissions permissions =
Mono.Unix.Native.FilePermissions.S_IRWXU |
Mono.Unix.Native.FilePermissions.S_IRGRP |
Mono.Unix.Native.FilePermissions.S_IWGRP |
Mono.Unix.Native.FilePermissions.S_IXGRP;
//
// chmod the file.
//
Mono.Unix.Native.Syscall.chmod(_lockFile, permissions);
}
public static void open(string path, OpenFlags flags, Mono.Unix.Native.FilePermissions mode, Action <FileStream, Exception> callback) // fd, error
{
ThreadPool.QueueUserWorkItem(a =>
{
try
{
FileMode fm;
FileAccess fa;
FileShare fs = FileShare.ReadWrite;
if (0 != (flags & OpenFlags.O_CREAT))
{
fm = FileMode.Create;
}
else
{
fm = FileMode.Open;
}
if (0 != (flags & OpenFlags.O_RDWR))
{
fa = FileAccess.ReadWrite;
}
else if (0 != (flags & OpenFlags.O_WRONLY))
{
fa = FileAccess.Write;
}
else
{
fa = FileAccess.Read;
}
var stream = new FileStream(path, fm, fa, fs);
Boundary.Instance.ExecuteOnTargetLoop(() => callback(stream, null));
}
catch (Exception e)
{
Boundary.Instance.ExecuteOnTargetLoop(() => callback(null, e));
}
});
}
static extern IntPtr eio_open(string path, OpenFlags flags, mode_t mode, int pri, eio_cb cb, IntPtr data);
static extern IntPtr eio_open(string path, OpenFlags flags, mode_t mode, int pri, eio_cb cb, IntPtr data);