public override void Lock(bool nonBlock = false)
{
if (LockedCount == 0)
{
IO.MakeDirIfNotExists(Env.UnixMutantDir);
UnixPermissions perm = UnixPermissions.S_IRUSR | UnixPermissions.S_IWUSR | UnixPermissions.S_IRGRP | UnixPermissions.S_IWGRP | UnixPermissions.S_IROTH | UnixPermissions.S_IWOTH;
IntPtr fd = UnixApi.Open(Filename, UnixApi.OpenFlags.O_CREAT | UnixApi.OpenFlags.O_CLOEXEC, (int)perm);
if (fd.ToInt64() < 0)
{
throw new IOException("Open failed.");
}
try
{
if (UnixApi.FLock(fd, UnixApi.LockOperations.LOCK_EX | (nonBlock ? UnixApi.LockOperations.LOCK_NB : 0)) == -1)
{
throw new IOException("FLock failed.");
}
}
catch
{
UnixApi.Close(fd);
throw;
}
this.FileHandle = fd;
LockedCount++;
}
}
/// <summary>
/// Change the permissions of a file or directory
/// </summary>
/// <param name="file">File to modify</param>
/// <param name="user">User permissions</param>
/// <param name="group">Group permissions</param>
/// <param name="any">Other permissions</param>
/// <exception cref="IOException">Operation failed</exception>
public static void Chmod(string file, UnixPermissions user, UnixPermissions group, UnixPermissions any)
{
int mode = 0;
mode |= ((int)user) << 6;
mode |= ((int)group) << 3;
mode |= (int)any;
if (Interop.chmod(file, (ushort)mode) < 0)
{
throw new IOException($"Failed to change permissions of {file} (error {Marshal.GetLastWin32Error()})");
}
}
private static extern int chmod(string pathname, UnixPermissions mode);
public static void DeleteUnusedMutantFiles()
{
if (Env.IsUnix == false)
{
return;
}
try
{
string[] fileFullPathList = Directory.GetFiles(Env.UnixMutantDir);
foreach (string fileFullPath in fileFullPathList)
{
try
{
if (fileFullPath.EndsWith(Extension, StringComparison.OrdinalIgnoreCase))
{
UnixPermissions perm = UnixPermissions.S_IRUSR | UnixPermissions.S_IWUSR | UnixPermissions.S_IRGRP | UnixPermissions.S_IWGRP | UnixPermissions.S_IROTH | UnixPermissions.S_IWOTH;
bool okToDelete = false;
IntPtr fd = UnixApi.Open(fileFullPath, UnixApi.OpenFlags.O_CREAT | UnixApi.OpenFlags.O_CLOEXEC, (int)perm);
if (fd.ToInt64() >= 0)
{
try
{
if (UnixApi.FLock(fd, UnixApi.LockOperations.LOCK_EX | UnixApi.LockOperations.LOCK_NB) != -1)
{
okToDelete = true;
}
}
finally
{
try
{
UnixApi.FLock(fd, UnixApi.LockOperations.LOCK_UN);
}
catch { }
try
{
UnixApi.Close(fd);
}
catch { }
}
}
if (okToDelete)
{
try
{
File.Delete(fileFullPath);
}
catch { }
}
}
}
catch { }
}
}
catch { }
}
