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#include "serialise.hh"
#include "util.hh"
#include "remote-store.hh"
#include "worker-protocol.hh"
#include "archive.hh"
#include "globals.hh"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <iostream>
#include <unistd.h>
namespace nix {
RemoteStore::RemoteStore()
{
int sockets[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets) == -1)
throw SysError("cannot create sockets");
fdSelf = sockets[0];
AutoCloseFD fdChild = sockets[1];
/* Start the worker. */
Path worker = getEnv("NIX_WORKER");
if (worker == "")
worker = nixBinDir + "/nix-worker";
string verbosityArg = "-";
for (int i = 1; i < verbosity; ++i)
verbosityArg += "v";
child = fork();
switch (child) {
case -1:
throw SysError("unable to fork");
case 0:
try { /* child */
if (dup2(fdChild, STDOUT_FILENO) == -1)
throw SysError("dupping write side");
if (dup2(fdChild, STDIN_FILENO) == -1)
throw SysError("dupping read side");
close(fdSelf);
close(fdChild);
int fdDebug = open("/tmp/worker-log", O_WRONLY | O_CREAT | O_TRUNC, 0644);
assert(fdDebug != -1);
if (dup2(fdDebug, STDERR_FILENO) == -1)
throw SysError("dupping stderr");
close(fdDebug);
execlp(worker.c_str(), worker.c_str(), "--slave",
/* hacky - must be at the end */
verbosityArg == "-" ? NULL : verbosityArg.c_str(),
NULL);
throw SysError(format("executing `%1%'") % worker);
} catch (std::exception & e) {
std::cerr << format("child error: %1%\n") % e.what();
}
quickExit(1);
}
fdChild.close();
from.fd = fdSelf;
to.fd = fdSelf;
/* Send the magic greeting, check for the reply. */
try {
processStderr();
writeInt(WORKER_MAGIC_1, to);
unsigned int magic = readInt(from);
if (magic != WORKER_MAGIC_2) throw Error("protocol mismatch");
} catch (Error & e) {
throw Error(format("cannot start worker process `%1%' (%2%)")
% worker % e.msg());
}
}
RemoteStore::~RemoteStore()
{
try {
fdSelf.close();
child.wait(true);
} catch (Error & e) {
printMsg(lvlError, format("error (ignored): %1%") % e.msg());
}
}
bool RemoteStore::isValidPath(const Path & path)
{
writeInt(wopIsValidPath, to);
writeString(path, to);
unsigned int reply = readInt(from);
return reply != 0;
}
Substitutes RemoteStore::querySubstitutes(const Path & path)
{
throw Error("not implemented 2");
}
bool RemoteStore::hasSubstitutes(const Path & path)
{
writeInt(wopHasSubstitutes, to);
writeString(path, to);
unsigned int reply = readInt(from);
return reply != 0;
}
Hash RemoteStore::queryPathHash(const Path & path)
{
writeInt(wopQueryPathHash, to);
writeString(path, to);
string hash = readString(from);
return parseHash(htSHA256, hash);
}
void RemoteStore::queryReferences(const Path & path,
PathSet & references)
{
writeInt(wopQueryReferences, to);
writeString(path, to);
PathSet references2 = readStringSet(from);
references.insert(references2.begin(), references2.end());
}
void RemoteStore::queryReferrers(const Path & path,
PathSet & referrers)
{
writeInt(wopQueryReferrers, to);
writeString(path, to);
PathSet referrers2 = readStringSet(from);
referrers.insert(referrers2.begin(), referrers2.end());
}
Path RemoteStore::addToStore(const Path & _srcPath, bool fixed,
bool recursive, string hashAlgo)
{
Path srcPath(absPath(_srcPath));
writeInt(wopAddToStore, to);
writeString(baseNameOf(srcPath), to);
writeInt(fixed ? 1 : 0, to);
writeInt(recursive ? 1 : 0, to);
writeString(hashAlgo, to);
dumpPath(srcPath, to);
Path path = readString(from);
return path;
}
Path RemoteStore::addTextToStore(const string & suffix, const string & s,
const PathSet & references)
{
writeInt(wopAddTextToStore, to);
writeString(suffix, to);
writeString(s, to);
writeStringSet(references, to);
Path path = readString(from);
return path;
}
void RemoteStore::buildDerivations(const PathSet & drvPaths)
{
writeInt(wopBuildDerivations, to);
writeStringSet(drvPaths, to);
processStderr();
readInt(from);
}
void RemoteStore::ensurePath(const Path & path)
{
writeInt(wopEnsurePath, to);
writeString(path, to);
readInt(from);
}
void RemoteStore::addTempRoot(const Path & path)
{
writeInt(wopAddTempRoot, to);
writeString(path, to);
readInt(from);
}
void RemoteStore::syncWithGC()
{
writeInt(wopSyncWithGC, to);
readInt(from);
}
void RemoteStore::processStderr()
{
unsigned int msg;
while ((msg = readInt(from)) == STDERR_NEXT) {
string s = readString(from);
writeToStderr((unsigned char *) s.c_str(), s.size());
}
if (msg == STDERR_ERROR)
throw Error(readString(from));
else if (msg != STDERR_LAST)
throw Error("protocol error processing standard error");
}
}
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