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#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 = socket(PF_UNIX, SOCK_STREAM
#ifdef SOCK_CLOEXEC
| SOCK_CLOEXEC
#endif
, 0);
if (!conn->fd)
throw SysError("cannot create Unix domain socket");
closeOnExec(conn->fd.get());
string socketPath = path ? *path : settings.nixDaemonSocketFile;
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
if (socketPath.size() + 1 >= sizeof(addr.sun_path))
throw Error("socket path '%1%' is too long", socketPath);
strcpy(addr.sun_path, socketPath.c_str());
if (::connect(conn->fd.get(), (struct sockaddr *) &addr, sizeof(addr)) == -1)
throw SysError("cannot connect to daemon at '%1%'", socketPath);
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;
}
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