Rename nix-worker to nix-daemon

1 files changed, 0 insertions, 914 deletions

diff --git a/src/nix-worker/nix-worker.cc b/src/nix-worker/nix-worker.cc
deleted file mode 100644
index 833fc3518415..000000000000
--- a/src/nix-worker/nix-worker.cc
+++ /dev/null
@@ -1,914 +0,0 @@
-#include "shared.hh"
-#include "local-store.hh"
-#include "util.hh"
-#include "serialise.hh"
-#include "worker-protocol.hh"
-#include "archive.hh"
-#include "globals.hh"
-
-#include <iostream>
-#include <cstring>
-#include <unistd.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <fcntl.h>
-#include <errno.h>
-
-using namespace nix;
-
-
-/* On platforms that have O_ASYNC, we can detect when a client
-   disconnects and immediately kill any ongoing builds.  On platforms
-   that lack it, we only notice the disconnection the next time we try
-   to write to the client.  So if you have a builder that never
-   generates output on stdout/stderr, the worker will never notice
-   that the client has disconnected until the builder terminates. */
-#ifdef O_ASYNC
-#define HAVE_HUP_NOTIFICATION
-#ifndef SIGPOLL
-#define SIGPOLL SIGIO
-#endif
-#endif
-
-
-static FdSource from(STDIN_FILENO);
-static FdSink to(STDOUT_FILENO);
-
-bool canSendStderr;
-pid_t myPid;
-
-
-
-/* This function is called anytime we want to write something to
-   stderr.  If we're in a state where the protocol allows it (i.e.,
-   when canSendStderr), send the message to the client over the
-   socket. */
-static void tunnelStderr(const unsigned char * buf, size_t count)
-{
-    /* Don't send the message to the client if we're a child of the
-       process handling the connection.  Otherwise we could screw up
-       the protocol.  It's up to the parent to redirect stderr and
-       send it to the client somehow (e.g., as in build.cc). */
-    if (canSendStderr && myPid == getpid()) {
-        try {
-            writeInt(STDERR_NEXT, to);
-            writeString(buf, count, to);
-            to.flush();
-        } catch (...) {
-            /* Write failed; that means that the other side is
-               gone. */
-            canSendStderr = false;
-            throw;
-        }
-    } else
-        writeFull(STDERR_FILENO, buf, count);
-}
-
-
-/* Return true if the remote side has closed its end of the
-   connection, false otherwise.  Should not be called on any socket on
-   which we expect input! */
-static bool isFarSideClosed(int socket)
-{
-    struct timeval timeout;
-    timeout.tv_sec = timeout.tv_usec = 0;
-
-    fd_set fds;
-    FD_ZERO(&fds);
-    FD_SET(socket, &fds);
-
-    while (select(socket + 1, &fds, 0, 0, &timeout) == -1)
-        if (errno != EINTR) throw SysError("select()");
-
-    if (!FD_ISSET(socket, &fds)) return false;
-
-    /* Destructive read to determine whether the select() marked the
-       socket as readable because there is actual input or because
-       we've reached EOF (i.e., a read of size 0 is available). */
-    char c;
-    int rd;
-    if ((rd = read(socket, &c, 1)) > 0)
-        throw Error("EOF expected (protocol error?)");
-    else if (rd == -1 && errno != ECONNRESET)
-        throw SysError("expected connection reset or EOF");
-
-    return true;
-}
-
-
-/* A SIGPOLL signal is received when data is available on the client
-   communication socket, or when the client has closed its side of the
-   socket.  This handler is enabled at precisely those moments in the
-   protocol when we're doing work and the client is supposed to be
-   quiet.  Thus, if we get a SIGPOLL signal, it means that the client
-   has quit.  So we should quit as well.
-
-   Too bad most operating systems don't support the POLL_HUP value for
-   si_code in siginfo_t.  That would make most of the SIGPOLL
-   complexity unnecessary, i.e., we could just enable SIGPOLL all the
-   time and wouldn't have to worry about races. */
-static void sigPollHandler(int sigNo)
-{
-    using namespace std;
-    try {
-        /* Check that the far side actually closed.  We're still
-           getting spurious signals every once in a while.  I.e.,
-           there is no input available, but we get a signal with
-           POLL_IN set.  Maybe it's delayed or something. */
-        if (isFarSideClosed(from.fd)) {
-            if (!blockInt) {
-                _isInterrupted = 1;
-                blockInt = 1;
-                canSendStderr = false;
-                const char * s = "SIGPOLL\n";
-                write(STDERR_FILENO, s, strlen(s));
-            }
-        } else {
-            const char * s = "spurious SIGPOLL\n";
-            write(STDERR_FILENO, s, strlen(s));
-        }
-    }
-    catch (Error & e) {
-        /* Shouldn't happen. */
-        string s = "impossible: " + e.msg() + '\n';
-        write(STDERR_FILENO, s.data(), s.size());
-        throw;
-    }
-}
-
-
-static void setSigPollAction(bool enable)
-{
-#ifdef HAVE_HUP_NOTIFICATION
-    struct sigaction act, oact;
-    act.sa_handler = enable ? sigPollHandler : SIG_IGN;
-    sigfillset(&act.sa_mask);
-    act.sa_flags = 0;
-    if (sigaction(SIGPOLL, &act, &oact))
-        throw SysError("setting handler for SIGPOLL");
-#endif
-}
-
-
-/* startWork() means that we're starting an operation for which we
-   want to send out stderr to the client. */
-static void startWork()
-{
-    canSendStderr = true;
-
-    /* Handle client death asynchronously. */
-    setSigPollAction(true);
-
-    /* Of course, there is a race condition here: the socket could
-       have closed between when we last read from / wrote to it, and
-       between the time we set the handler for SIGPOLL.  In that case
-       we won't get the signal.  So do a non-blocking select() to find
-       out if any input is available on the socket.  If there is, it
-       has to be the 0-byte read that indicates that the socket has
-       closed. */
-    if (isFarSideClosed(from.fd)) {
-        _isInterrupted = 1;
-        checkInterrupt();
-    }
-}
-
-
-/* stopWork() means that we're done; stop sending stderr to the
-   client. */
-static void stopWork(bool success = true, const string & msg = "", unsigned int status = 0)
-{
-    /* Stop handling async client death; we're going to a state where
-       we're either sending or receiving from the client, so we'll be
-       notified of client death anyway. */
-    setSigPollAction(false);
-
-    canSendStderr = false;
-
-    if (success)
-        writeInt(STDERR_LAST, to);
-    else {
-        writeInt(STDERR_ERROR, to);
-        writeString(msg, to);
-        if (status != 0) writeInt(status, to);
-    }
-}
-
-
-struct TunnelSink : Sink
-{
-    Sink & to;
-    TunnelSink(Sink & to) : to(to) { }
-    virtual void operator () (const unsigned char * data, size_t len)
-    {
-        writeInt(STDERR_WRITE, to);
-        writeString(data, len, to);
-    }
-};
-
-
-struct TunnelSource : BufferedSource
-{
-    Source & from;
-    TunnelSource(Source & from) : from(from) { }
-    size_t readUnbuffered(unsigned char * data, size_t len)
-    {
-        /* Careful: we're going to receive data from the client now,
-           so we have to disable the SIGPOLL handler. */
-        setSigPollAction(false);
-        canSendStderr = false;
-
-        writeInt(STDERR_READ, to);
-        writeInt(len, to);
-        to.flush();
-        size_t n = readString(data, len, from);
-
-        startWork();
-        if (n == 0) throw EndOfFile("unexpected end-of-file");
-        return n;
-    }
-};
-
-
-/* If the NAR archive contains a single file at top-level, then save
-   the contents of the file to `s'.  Otherwise barf. */
-struct RetrieveRegularNARSink : ParseSink
-{
-    bool regular;
-    string s;
-
-    RetrieveRegularNARSink() : regular(true) { }
-
-    void createDirectory(const Path & path)
-    {
-        regular = false;
-    }
-
-    void receiveContents(unsigned char * data, unsigned int len)
-    {
-        s.append((const char *) data, len);
-    }
-
-    void createSymlink(const Path & path, const string & target)
-    {
-        regular = false;
-    }
-};
-
-
-/* Adapter class of a Source that saves all data read to `s'. */
-struct SavingSourceAdapter : Source
-{
-    Source & orig;
-    string s;
-    SavingSourceAdapter(Source & orig) : orig(orig) { }
-    size_t read(unsigned char * data, size_t len)
-    {
-        size_t n = orig.read(data, len);
-        s.append((const char *) data, n);
-        return n;
-    }
-};
-
-
-static void performOp(unsigned int clientVersion,
-    Source & from, Sink & to, unsigned int op)
-{
-    switch (op) {
-
-#if 0
-    case wopQuit: {
-        /* Close the database. */
-        store.reset((StoreAPI *) 0);
-        writeInt(1, to);
-        break;
-    }
-#endif
-
-    case wopIsValidPath: {
-        Path path = readStorePath(from);
-        startWork();
-        bool result = store->isValidPath(path);
-        stopWork();
-        writeInt(result, to);
-        break;
-    }
-
-    case wopQueryValidPaths: {
-        PathSet paths = readStorePaths<PathSet>(from);
-        startWork();
-        PathSet res = store->queryValidPaths(paths);
-        stopWork();
-        writeStrings(res, to);
-        break;
-    }
-
-    case wopHasSubstitutes: {
-        Path path = readStorePath(from);
-        startWork();
-        PathSet res = store->querySubstitutablePaths(singleton<PathSet>(path));
-        stopWork();
-        writeInt(res.find(path) != res.end(), to);
-        break;
-    }
-
-    case wopQuerySubstitutablePaths: {
-        PathSet paths = readStorePaths<PathSet>(from);
-        startWork();
-        PathSet res = store->querySubstitutablePaths(paths);
-        stopWork();
-        writeStrings(res, to);
-        break;
-    }
-
-    case wopQueryPathHash: {
-        Path path = readStorePath(from);
-        startWork();
-        Hash hash = store->queryPathHash(path);
-        stopWork();
-        writeString(printHash(hash), to);
-        break;
-    }
-
-    case wopQueryReferences:
-    case wopQueryReferrers:
-    case wopQueryDerivationOutputs: {
-        Path path = readStorePath(from);
-        startWork();
-        PathSet paths;
-        if (op == wopQueryReferences)
-            store->queryReferences(path, paths);
-        else if (op == wopQueryReferrers)
-            store->queryReferrers(path, paths);
-        else paths = store->queryDerivationOutputs(path);
-        stopWork();
-        writeStrings(paths, to);
-        break;
-    }
-
-    case wopQueryDerivationOutputNames: {
-        Path path = readStorePath(from);
-        startWork();
-        StringSet names;
-        names = store->queryDerivationOutputNames(path);
-        stopWork();
-        writeStrings(names, to);
-        break;
-    }
-
-    case wopQueryDeriver: {
-        Path path = readStorePath(from);
-        startWork();
-        Path deriver = store->queryDeriver(path);
-        stopWork();
-        writeString(deriver, to);
-        break;
-    }
-
-    case wopQueryPathFromHashPart: {
-        string hashPart = readString(from);
-        startWork();
-        Path path = store->queryPathFromHashPart(hashPart);
-        stopWork();
-        writeString(path, to);
-        break;
-    }
-
-    case wopAddToStore: {
-        string baseName = readString(from);
-        bool fixed = readInt(from) == 1; /* obsolete */
-        bool recursive = readInt(from) == 1;
-        string s = readString(from);
-        /* Compatibility hack. */
-        if (!fixed) {
-            s = "sha256";
-            recursive = true;
-        }
-        HashType hashAlgo = parseHashType(s);
-
-        SavingSourceAdapter savedNAR(from);
-        RetrieveRegularNARSink savedRegular;
-
-        if (recursive) {
-            /* Get the entire NAR dump from the client and save it to
-               a string so that we can pass it to
-               addToStoreFromDump(). */
-            ParseSink sink; /* null sink; just parse the NAR */
-            parseDump(sink, savedNAR);
-        } else
-            parseDump(savedRegular, from);
-
-        startWork();
-        if (!savedRegular.regular) throw Error("regular file expected");
-        Path path = dynamic_cast<LocalStore *>(store.get())
-            ->addToStoreFromDump(recursive ? savedNAR.s : savedRegular.s, baseName, recursive, hashAlgo);
-        stopWork();
-
-        writeString(path, to);
-        break;
-    }
-
-    case wopAddTextToStore: {
-        string suffix = readString(from);
-        string s = readString(from);
-        PathSet refs = readStorePaths<PathSet>(from);
-        startWork();
-        Path path = store->addTextToStore(suffix, s, refs);
-        stopWork();
-        writeString(path, to);
-        break;
-    }
-
-    case wopExportPath: {
-        Path path = readStorePath(from);
-        bool sign = readInt(from) == 1;
-        startWork();
-        TunnelSink sink(to);
-        store->exportPath(path, sign, sink);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopImportPaths: {
-        startWork();
-        TunnelSource source(from);
-        Paths paths = store->importPaths(true, source);
-        stopWork();
-        writeStrings(paths, to);
-        break;
-    }
-
-    case wopBuildPaths: {
-        PathSet drvs = readStorePaths<PathSet>(from);
-        startWork();
-        store->buildPaths(drvs);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopEnsurePath: {
-        Path path = readStorePath(from);
-        startWork();
-        store->ensurePath(path);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopAddTempRoot: {
-        Path path = readStorePath(from);
-        startWork();
-        store->addTempRoot(path);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopAddIndirectRoot: {
-        Path path = absPath(readString(from));
-        startWork();
-        store->addIndirectRoot(path);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopSyncWithGC: {
-        startWork();
-        store->syncWithGC();
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopFindRoots: {
-        startWork();
-        Roots roots = store->findRoots();
-        stopWork();
-        writeInt(roots.size(), to);
-        for (Roots::iterator i = roots.begin(); i != roots.end(); ++i) {
-            writeString(i->first, to);
-            writeString(i->second, to);
-        }
-        break;
-    }
-
-    case wopCollectGarbage: {
-        GCOptions options;
-        options.action = (GCOptions::GCAction) readInt(from);
-        options.pathsToDelete = readStorePaths<PathSet>(from);
-        options.ignoreLiveness = readInt(from);
-        options.maxFreed = readLongLong(from);
-        readInt(from); // obsolete field
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 5) {
-            /* removed options */
-            readInt(from);
-            readInt(from);
-        }
-
-        GCResults results;
-
-        startWork();
-        if (options.ignoreLiveness)
-            throw Error("you are not allowed to ignore liveness");
-        store->collectGarbage(options, results);
-        stopWork();
-
-        writeStrings(results.paths, to);
-        writeLongLong(results.bytesFreed, to);
-        writeLongLong(0, to); // obsolete
-
-        break;
-    }
-
-    case wopSetOptions: {
-        settings.keepFailed = readInt(from) != 0;
-        settings.keepGoing = readInt(from) != 0;
-        settings.tryFallback = readInt(from) != 0;
-        verbosity = (Verbosity) readInt(from);
-        settings.maxBuildJobs = readInt(from);
-        settings.maxSilentTime = readInt(from);
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 2)
-            settings.useBuildHook = readInt(from) != 0;
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 4) {
-            settings.buildVerbosity = (Verbosity) readInt(from);
-            logType = (LogType) readInt(from);
-            settings.printBuildTrace = readInt(from) != 0;
-        }
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 6)
-            settings.buildCores = readInt(from);
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 10)
-            settings.useSubstitutes = readInt(from) != 0;
-        if (GET_PROTOCOL_MINOR(clientVersion) >= 12) {
-            unsigned int n = readInt(from);
-            for (unsigned int i = 0; i < n; i++) {
-                string name = readString(from);
-                string value = readString(from);
-                settings.set("untrusted-" + name, value);
-            }
-        }
-        startWork();
-        stopWork();
-        break;
-    }
-
-    case wopQuerySubstitutablePathInfo: {
-        Path path = absPath(readString(from));
-        startWork();
-        SubstitutablePathInfos infos;
-        store->querySubstitutablePathInfos(singleton<PathSet>(path), infos);
-        stopWork();
-        SubstitutablePathInfos::iterator i = infos.find(path);
-        if (i == infos.end())
-            writeInt(0, to);
-        else {
-            writeInt(1, to);
-            writeString(i->second.deriver, to);
-            writeStrings(i->second.references, to);
-            writeLongLong(i->second.downloadSize, to);
-            if (GET_PROTOCOL_MINOR(clientVersion) >= 7)
-                writeLongLong(i->second.narSize, to);
-        }
-        break;
-    }
-
-    case wopQuerySubstitutablePathInfos: {
-        PathSet paths = readStorePaths<PathSet>(from);
-        startWork();
-        SubstitutablePathInfos infos;
-        store->querySubstitutablePathInfos(paths, infos);
-        stopWork();
-        writeInt(infos.size(), to);
-        foreach (SubstitutablePathInfos::iterator, i, infos) {
-            writeString(i->first, to);
-            writeString(i->second.deriver, to);
-            writeStrings(i->second.references, to);
-            writeLongLong(i->second.downloadSize, to);
-            writeLongLong(i->second.narSize, to);
-        }
-        break;
-    }
-
-    case wopQueryAllValidPaths: {
-        startWork();
-        PathSet paths = store->queryAllValidPaths();
-        stopWork();
-        writeStrings(paths, to);
-        break;
-    }
-
-    case wopQueryFailedPaths: {
-        startWork();
-        PathSet paths = store->queryFailedPaths();
-        stopWork();
-        writeStrings(paths, to);
-        break;
-    }
-
-    case wopClearFailedPaths: {
-        PathSet paths = readStrings<PathSet>(from);
-        startWork();
-        store->clearFailedPaths(paths);
-        stopWork();
-        writeInt(1, to);
-        break;
-    }
-
-    case wopQueryPathInfo: {
-        Path path = readStorePath(from);
-        startWork();
-        ValidPathInfo info = store->queryPathInfo(path);
-        stopWork();
-        writeString(info.deriver, to);
-        writeString(printHash(info.hash), to);
-        writeStrings(info.references, to);
-        writeInt(info.registrationTime, to);
-        writeLongLong(info.narSize, to);
-        break;
-    }
-
-    default:
-        throw Error(format("invalid operation %1%") % op);
-    }
-}
-
-
-static void processConnection()
-{
-    canSendStderr = false;
-    myPid = getpid();
-    writeToStderr = tunnelStderr;
-
-#ifdef HAVE_HUP_NOTIFICATION
-    /* Allow us to receive SIGPOLL for events on the client socket. */
-    setSigPollAction(false);
-    if (fcntl(from.fd, F_SETOWN, getpid()) == -1)
-        throw SysError("F_SETOWN");
-    if (fcntl(from.fd, F_SETFL, fcntl(from.fd, F_GETFL, 0) | O_ASYNC) == -1)
-        throw SysError("F_SETFL");
-#endif
-
-    /* Exchange the greeting. */
-    unsigned int magic = readInt(from);
-    if (magic != WORKER_MAGIC_1) throw Error("protocol mismatch");
-    writeInt(WORKER_MAGIC_2, to);
-    writeInt(PROTOCOL_VERSION, to);
-    to.flush();
-    unsigned int clientVersion = readInt(from);
-
-    bool reserveSpace = true;
-    if (GET_PROTOCOL_MINOR(clientVersion) >= 11)
-        reserveSpace = readInt(from) != 0;
-
-    /* Send startup error messages to the client. */
-    startWork();
-
-    try {
-
-        /* If we can't accept clientVersion, then throw an error
-           *here* (not above). */
-
-#if 0
-        /* Prevent users from doing something very dangerous. */
-        if (geteuid() == 0 &&
-            querySetting("build-users-group", "") == "")
-            throw Error("if you run `nix-worker' as root, then you MUST set `build-users-group'!");
-#endif
-
-        /* Open the store. */
-        store = boost::shared_ptr<StoreAPI>(new LocalStore(reserveSpace));
-
-        stopWork();
-        to.flush();
-
-    } catch (Error & e) {
-        stopWork(false, e.msg());
-        to.flush();
-        return;
-    }
-
-    /* Process client requests. */
-    unsigned int opCount = 0;
-
-    while (true) {
-        WorkerOp op;
-        try {
-            op = (WorkerOp) readInt(from);
-        } catch (EndOfFile & e) {
-            break;
-        }
-
-        opCount++;
-
-        try {
-            performOp(clientVersion, from, to, op);
-        } catch (Error & e) {
-            /* If we're not in a state were we can send replies, then
-               something went wrong processing the input of the
-               client.  This can happen especially if I/O errors occur
-               during addTextToStore() / importPath().  If that
-               happens, just send the error message and exit. */
-            bool errorAllowed = canSendStderr;
-            if (!errorAllowed) printMsg(lvlError, format("error processing client input: %1%") % e.msg());
-            stopWork(false, e.msg(), GET_PROTOCOL_MINOR(clientVersion) >= 8 ? e.status : 0);
-            if (!errorAllowed) break;
-        }
-
-        to.flush();
-
-        assert(!canSendStderr);
-    };
-
-    printMsg(lvlError, format("%1% worker operations") % opCount);
-}
-
-
-static void sigChldHandler(int sigNo)
-{
-    /* Reap all dead children. */
-    while (waitpid(-1, 0, WNOHANG) > 0) ;
-}
-
-
-static void setSigChldAction(bool autoReap)
-{
-    struct sigaction act, oact;
-    act.sa_handler = autoReap ? sigChldHandler : SIG_DFL;
-    sigfillset(&act.sa_mask);
-    act.sa_flags = 0;
-    if (sigaction(SIGCHLD, &act, &oact))
-        throw SysError("setting SIGCHLD handler");
-}
-
-
-#define SD_LISTEN_FDS_START 3
-
-
-static void daemonLoop()
-{
-    /* Get rid of children automatically; don't let them become
-       zombies. */
-    setSigChldAction(true);
-
-    AutoCloseFD fdSocket;
-
-    /* Handle socket-based activation by systemd. */
-    if (getEnv("LISTEN_FDS") != "") {
-        if (getEnv("LISTEN_PID") != int2String(getpid()) || getEnv("LISTEN_FDS") != "1")
-            throw Error("unexpected systemd environment variables");
-        fdSocket = SD_LISTEN_FDS_START;
-    }
-
-    /* Otherwise, create and bind to a Unix domain socket. */
-    else {
-
-        /* Create and bind to a Unix domain socket. */
-        fdSocket = socket(PF_UNIX, SOCK_STREAM, 0);
-        if (fdSocket == -1)
-            throw SysError("cannot create Unix domain socket");
-
-        string socketPath = settings.nixStateDir + DEFAULT_SOCKET_PATH;
-
-        createDirs(dirOf(socketPath));
-
-        /* Urgh, sockaddr_un allows path names of only 108 characters.
-           So chdir to the socket directory so that we can pass a
-           relative path name. */
-        chdir(dirOf(socketPath).c_str());
-        Path socketPathRel = "./" + baseNameOf(socketPath);
-
-        struct sockaddr_un addr;
-        addr.sun_family = AF_UNIX;
-        if (socketPathRel.size() >= sizeof(addr.sun_path))
-            throw Error(format("socket path `%1%' is too long") % socketPathRel);
-        strcpy(addr.sun_path, socketPathRel.c_str());
-
-        unlink(socketPath.c_str());
-
-        /* Make sure that the socket is created with 0666 permission
-           (everybody can connect --- provided they have access to the
-           directory containing the socket). */
-        mode_t oldMode = umask(0111);
-        int res = bind(fdSocket, (struct sockaddr *) &addr, sizeof(addr));
-        umask(oldMode);
-        if (res == -1)
-            throw SysError(format("cannot bind to socket `%1%'") % socketPath);
-
-        chdir("/"); /* back to the root */
-
-        if (listen(fdSocket, 5) == -1)
-            throw SysError(format("cannot listen on socket `%1%'") % socketPath);
-    }
-
-    closeOnExec(fdSocket);
-
-    /* Loop accepting connections. */
-    while (1) {
-
-        try {
-            /* Important: the server process *cannot* open the SQLite
-               database, because it doesn't like forks very much. */
-            assert(!store);
-
-            /* Accept a connection. */
-            struct sockaddr_un remoteAddr;
-            socklen_t remoteAddrLen = sizeof(remoteAddr);
-
-            AutoCloseFD remote = accept(fdSocket,
-                (struct sockaddr *) &remoteAddr, &remoteAddrLen);
-            checkInterrupt();
-            if (remote == -1) {
-                if (errno == EINTR)
-                    continue;
-                else
-                    throw SysError("accepting connection");
-            }
-
-            closeOnExec(remote);
-
-            /* Get the identity of the caller, if possible. */
-            uid_t clientUid = -1;
-            pid_t clientPid = -1;
-
-#if defined(SO_PEERCRED)
-            ucred cred;
-            socklen_t credLen = sizeof(cred);
-            if (getsockopt(remote, SOL_SOCKET, SO_PEERCRED, &cred, &credLen) != -1) {
-                clientPid = cred.pid;
-                clientUid = cred.uid;
-            }
-#endif
-
-            printMsg(lvlInfo, format("accepted connection from pid %1%, uid %2%") % clientPid % clientUid);
-
-            /* Fork a child to handle the connection. */
-            pid_t child;
-            child = fork();
-
-            switch (child) {
-
-            case -1:
-                throw SysError("unable to fork");
-
-            case 0:
-                try { /* child */
-
-                    /* Background the worker. */
-                    if (setsid() == -1)
-                        throw SysError(format("creating a new session"));
-
-                    /* Restore normal handling of SIGCHLD. */
-                    setSigChldAction(false);
-
-                    /* For debugging, stuff the pid into argv[1]. */
-                    if (clientPid != -1 && argvSaved[1]) {
-                        string processName = int2String(clientPid);
-                        strncpy(argvSaved[1], processName.c_str(), strlen(argvSaved[1]));
-                    }
-
-                    /* Handle the connection. */
-                    from.fd = remote;
-                    to.fd = remote;
-                    processConnection();
-
-                } catch (std::exception & e) {
-                    std::cerr << format("child error: %1%\n") % e.what();
-                }
-                exit(0);
-            }
-
-        } catch (Interrupted & e) {
-            throw;
-        } catch (Error & e) {
-            printMsg(lvlError, format("error processing connection: %1%") % e.msg());
-        }
-    }
-}
-
-
-void run(Strings args)
-{
-    bool daemon = false;
-
-    for (Strings::iterator i = args.begin(); i != args.end(); ) {
-        string arg = *i++;
-        if (arg == "--daemon") /* ignored for backwards compatibility */;
-    }
-
-    chdir("/");
-    daemonLoop();
-}
-
-
-void printHelp()
-{
-    showManPage("nix-worker");
-}
-
-
-string programId = "nix-worker";