mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-13 09:46:16 +02:00
8614cf1334
The garbage collector no longer blocks other processes from adding/building store paths or adding GC roots. To prevent the collector from deleting store paths just added by another process, processes need to connect to the garbage collector via a Unix domain socket to register new temporary roots.
74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
#include "uds-remote-store.hh"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include <cstring>
|
|
|
|
|
|
namespace nix {
|
|
|
|
UDSRemoteStore::UDSRemoteStore(const Params & params)
|
|
: StoreConfig(params)
|
|
, LocalFSStoreConfig(params)
|
|
, RemoteStoreConfig(params)
|
|
, UDSRemoteStoreConfig(params)
|
|
, Store(params)
|
|
, LocalFSStore(params)
|
|
, RemoteStore(params)
|
|
{
|
|
}
|
|
|
|
|
|
UDSRemoteStore::UDSRemoteStore(
|
|
const std::string scheme,
|
|
std::string socket_path,
|
|
const Params & params)
|
|
: UDSRemoteStore(params)
|
|
{
|
|
path.emplace(socket_path);
|
|
}
|
|
|
|
|
|
std::string UDSRemoteStore::getUri()
|
|
{
|
|
if (path) {
|
|
return std::string("unix://") + *path;
|
|
} else {
|
|
return "daemon";
|
|
}
|
|
}
|
|
|
|
|
|
void UDSRemoteStore::Connection::closeWrite()
|
|
{
|
|
shutdown(fd.get(), SHUT_WR);
|
|
}
|
|
|
|
|
|
ref<RemoteStore::Connection> UDSRemoteStore::openConnection()
|
|
{
|
|
auto conn = make_ref<Connection>();
|
|
|
|
/* Connect to a daemon that does the privileged work for us. */
|
|
conn->fd = createUnixDomainSocket();
|
|
|
|
nix::connect(conn->fd.get(), path ? *path : settings.nixDaemonSocketFile);
|
|
|
|
conn->from.fd = conn->fd.get();
|
|
conn->to.fd = conn->fd.get();
|
|
|
|
conn->startTime = std::chrono::steady_clock::now();
|
|
|
|
return conn;
|
|
}
|
|
|
|
|
|
static RegisterStoreImplementation<UDSRemoteStore, UDSRemoteStoreConfig> regUDSRemoteStore;
|
|
|
|
}
|