aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--daemon.am7
-rw-r--r--nix/libstore/build.cc313
-rw-r--r--nix/libstore/gc.cc69
-rw-r--r--nix/libstore/globals.cc92
-rw-r--r--nix/libstore/globals.hh26
-rw-r--r--nix/libstore/local-store.cc81
-rw-r--r--nix/libstore/local-store.hh19
-rw-r--r--nix/libstore/optimise-store.cc16
-rw-r--r--nix/libstore/remote-store.cc31
-rw-r--r--nix/libstore/remote-store.hh5
-rw-r--r--nix/libstore/store-api.hh4
-rw-r--r--nix/libstore/worker-protocol.hh2
-rw-r--r--nix/libutil/archive.cc171
-rw-r--r--nix/libutil/archive.hh12
-rw-r--r--nix/libutil/serialise.cc27
-rw-r--r--nix/libutil/serialise.hh11
-rw-r--r--nix/libutil/types.hh17
-rw-r--r--nix/libutil/util.cc176
-rw-r--r--nix/libutil/util.hh30
-rw-r--r--nix/nix-daemon/guix-daemon.cc25
-rw-r--r--nix/nix-daemon/nix-daemon.cc134
-rw-r--r--tests/guix-archive.sh3
22 files changed, 750 insertions, 521 deletions
diff --git a/daemon.am b/daemon.am
index 9d6516ae6c..50b488923a 100644
--- a/daemon.am
+++ b/daemon.am
@@ -25,8 +25,8 @@ CLEANFILES += $(BUILT_SOURCES)
noinst_LIBRARIES = libformat.a libutil.a libstore.a
-# Use '-std=c++0x' for 'std::shared_ptr'.
-AM_CXXFLAGS = -Wall -std=c++0x
+# Use '-std=c++11' for 'std::shared_ptr', 'auto', lambdas, and more.
+AM_CXXFLAGS = -Wall -std=c++11
libformat_a_SOURCES = \
nix/boost/format/free_funcs.cc \
@@ -112,7 +112,8 @@ libstore_a_CPPFLAGS = \
-DNIX_CONF_DIR=\"$(sysconfdir)/guix\" \
-DNIX_LIBEXEC_DIR=\"$(libexecdir)\" \
-DNIX_BIN_DIR=\"$(bindir)\" \
- -DOPENSSL_PATH="\"guix-authenticate\""
+ -DOPENSSL_PATH="\"guix-authenticate\"" \
+ -DDEFAULT_CHROOT_DIRS="\"\""
libstore_a_CXXFLAGS = $(AM_CXXFLAGS) \
$(SQLITE3_CFLAGS) $(LIBGCRYPT_CFLAGS)
diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc
index f38cd29940..009fcb2c0c 100644
--- a/nix/libstore/build.cc
+++ b/nix/libstore/build.cc
@@ -57,9 +57,8 @@
#include <netinet/ip.h>
#endif
-#if HAVE_SYS_PERSONALITY_H
+#if __linux__
#include <sys/personality.h>
-#define CAN_DO_LINUX32_BUILDS
#endif
#if HAVE_STATVFS
@@ -85,8 +84,12 @@ class Goal;
typedef std::shared_ptr<Goal> GoalPtr;
typedef std::weak_ptr<Goal> WeakGoalPtr;
+struct CompareGoalPtrs {
+ bool operator() (const GoalPtr & a, const GoalPtr & b);
+};
+
/* Set of goals. */
-typedef set<GoalPtr> Goals;
+typedef set<GoalPtr, CompareGoalPtrs> Goals;
typedef list<WeakGoalPtr> WeakGoals;
/* A map of paths to goals (and the other way around). */
@@ -173,11 +176,20 @@ public:
(important!), etc. */
virtual void cancel(bool timeout) = 0;
+ virtual string key() = 0;
+
protected:
void amDone(ExitCode result);
};
+bool CompareGoalPtrs::operator() (const GoalPtr & a, const GoalPtr & b) {
+ string s1 = a->key();
+ string s2 = b->key();
+ return s1 < s2;
+}
+
+
/* A mapping used to remember for each child process to what goal it
belongs, and file descriptors for receiving log data and output
path creation commands. */
@@ -238,6 +250,9 @@ public:
failure). */
bool permanentFailure;
+ /* Set if at least one derivation had a timeout. */
+ bool timedOut;
+
LocalStore & store;
std::shared_ptr<HookInstance> hook;
@@ -301,6 +316,7 @@ public:
void addToWeakGoals(WeakGoals & goals, GoalPtr p)
{
// FIXME: necessary?
+ // FIXME: O(n)
foreach (WeakGoals::iterator, i, goals)
if (i->lock() == p) return;
goals.push_back(p);
@@ -374,8 +390,6 @@ void Goal::trace(const format & f)
/* Common initialisation performed in child processes. */
static void commonChildInit(Pipe & logPipe)
{
- restoreAffinity();
-
/* Put the child in a separate session (and thus a separate
process group) so that it has no controlling terminal (meaning
that e.g. ssh cannot open /dev/tty) and it doesn't receive
@@ -590,7 +604,9 @@ HookInstance::HookInstance()
{
debug("starting build hook");
- Path buildHook = absPath(getEnv("NIX_BUILD_HOOK"));
+ Path buildHook = getEnv("NIX_BUILD_HOOK");
+ if (string(buildHook, 0, 1) != "/") buildHook = settings.nixLibexecDir + "/nix/" + buildHook;
+ buildHook = canonPath(buildHook);
/* Create a pipe to get the output of the child. */
fromHook.create();
@@ -602,44 +618,30 @@ HookInstance::HookInstance()
builderOut.create();
/* Fork the hook. */
- pid = maybeVfork();
- switch (pid) {
-
- case -1:
- throw SysError("unable to fork");
+ pid = startProcess([&]() {
- case 0:
- try { /* child */
+ commonChildInit(fromHook);
- commonChildInit(fromHook);
+ if (chdir("/") == -1) throw SysError("changing into `/");
- if (chdir("/") == -1) throw SysError("changing into `/");
+ /* Dup the communication pipes. */
+ if (dup2(toHook.readSide, STDIN_FILENO) == -1)
+ throw SysError("dupping to-hook read side");
- /* Dup the communication pipes. */
- if (dup2(toHook.readSide, STDIN_FILENO) == -1)
- throw SysError("dupping to-hook read side");
+ /* Use fd 4 for the builder's stdout/stderr. */
+ if (dup2(builderOut.writeSide, 4) == -1)
+ throw SysError("dupping builder's stdout/stderr");
- /* Use fd 4 for the builder's stdout/stderr. */
- if (dup2(builderOut.writeSide, 4) == -1)
- throw SysError("dupping builder's stdout/stderr");
+ execl(buildHook.c_str(), buildHook.c_str(), settings.thisSystem.c_str(),
+ (format("%1%") % settings.maxSilentTime).str().c_str(),
+ (format("%1%") % settings.printBuildTrace).str().c_str(),
+ (format("%1%") % settings.buildTimeout).str().c_str(),
+ NULL);
- execl(buildHook.c_str(), buildHook.c_str(), settings.thisSystem.c_str(),
- (format("%1%") % settings.maxSilentTime).str().c_str(),
- (format("%1%") % settings.printBuildTrace).str().c_str(),
- (format("%1%") % settings.buildTimeout).str().c_str(),
- NULL);
+ throw SysError(format("executing `%1%'") % buildHook);
+ });
- throw SysError(format("executing `%1%'") % buildHook);
-
- } catch (std::exception & e) {
- writeToStderr("build hook error: " + string(e.what()) + "\n");
- }
- _exit(1);
- }
-
- /* parent */
pid.setSeparatePG(true);
- pid.setKillSignal(SIGTERM);
fromHook.writeSide.close();
toHook.readSide.close();
}
@@ -648,7 +650,8 @@ HookInstance::HookInstance()
HookInstance::~HookInstance()
{
try {
- pid.kill();
+ toHook.writeSide.close();
+ pid.kill(true);
} catch (...) {
ignoreException();
}
@@ -784,17 +787,21 @@ private:
outputs to allow hard links between outputs. */
InodesSeen inodesSeen;
- /* Magic exit code denoting that setting up the child environment
- failed. (It's possible that the child actually returns the
- exit code, but ah well.) */
- const static int childSetupFailed = 189;
-
public:
DerivationGoal(const Path & drvPath, const StringSet & wantedOutputs, Worker & worker, BuildMode buildMode = bmNormal);
~DerivationGoal();
void cancel(bool timeout);
+ string key()
+ {
+ /* Ensure that derivations get built in order of their name,
+ i.e. a derivation named "aardvark" always comes before
+ "baboon". And substitution goals always happen before
+ derivation goals (due to "b$"). */
+ return "b$" + storePathToName(drvPath) + "$" + drvPath;
+ }
+
void work();
Path getDrvPath()
@@ -879,13 +886,9 @@ DerivationGoal::~DerivationGoal()
{
/* Careful: we should never ever throw an exception from a
destructor. */
- try {
- killChild();
- deleteTmpDir(false);
- closeLogFile();
- } catch (...) {
- ignoreException();
- }
+ try { killChild(); } catch (...) { ignoreException(); }
+ try { deleteTmpDir(false); } catch (...) { ignoreException(); }
+ try { closeLogFile(); } catch (...) { ignoreException(); }
}
@@ -956,6 +959,11 @@ void DerivationGoal::init()
/* The first thing to do is to make sure that the derivation
exists. If it doesn't, it may be created through a
substitute. */
+ if (buildMode == bmNormal && worker.store.isValidPath(drvPath)) {
+ haveDerivation();
+ return;
+ }
+
addWaitee(worker.makeSubstitutionGoal(drvPath));
state = &DerivationGoal::haveDerivation;
@@ -1209,7 +1217,7 @@ static string get(const StringPairs & map, const string & key)
static bool canBuildLocally(const string & platform)
{
return platform == settings.thisSystem
-#ifdef CAN_DO_LINUX32_BUILDS
+#if __linux__
|| (platform == "i686-linux" && settings.thisSystem == "x86_64-linux")
#endif
;
@@ -1433,9 +1441,6 @@ void DerivationGoal::buildDone()
if (pathExists(chrootRootDir + *i))
rename((chrootRootDir + *i).c_str(), i->c_str());
- if (WIFEXITED(status) && WEXITSTATUS(status) == childSetupFailed)
- throw Error(format("failed to set up the build environment for `%1%'") % drvPath);
-
if (diskFull)
printMsg(lvlError, "note: build failure may have been caused by lack of free disk space");
@@ -1469,37 +1474,41 @@ void DerivationGoal::buildDone()
outputLocks.unlock();
} catch (BuildError & e) {
- printMsg(lvlError, e.msg());
+ if (!hook)
+ printMsg(lvlError, e.msg());
outputLocks.unlock();
buildUser.release();
- /* When using a build hook, the hook will return a remote
- build failure using exit code 100. Anything else is a hook
- problem. */
- bool hookError = hook &&
- (!WIFEXITED(status) || WEXITSTATUS(status) != 100);
+ if (hook && WIFEXITED(status) && WEXITSTATUS(status) == 101) {
+ if (settings.printBuildTrace)
+ printMsg(lvlError, format("@ build-failed %1% - timeout") % drvPath);
+ worker.timedOut = true;
+ }
- if (settings.printBuildTrace) {
- if (hook && hookError)
+ else if (hook && (!WIFEXITED(status) || WEXITSTATUS(status) != 100)) {
+ if (settings.printBuildTrace)
printMsg(lvlError, format("@ hook-failed %1% - %2% %3%")
% drvPath % status % e.msg());
- else
+ }
+
+ else {
+ if (settings.printBuildTrace)
printMsg(lvlError, format("@ build-failed %1% - %2% %3%")
% drvPath % 1 % e.msg());
+ worker.permanentFailure = !fixedOutput && !diskFull;
+
+ /* Register the outputs of this build as "failed" so we
+ won't try to build them again (negative caching).
+ However, don't do this for fixed-output derivations,
+ since they're likely to fail for transient reasons
+ (e.g., fetchurl not being able to access the network).
+ Hook errors (like communication problems with the
+ remote machine) shouldn't be cached either. */
+ if (settings.cacheFailure && !fixedOutput && !diskFull)
+ foreach (DerivationOutputs::iterator, i, drv.outputs)
+ worker.store.registerFailedPath(i->second.path);
}
- /* Register the outputs of this build as "failed" so we won't
- try to build them again (negative caching). However, don't
- do this for fixed-output derivations, since they're likely
- to fail for transient reasons (e.g., fetchurl not being
- able to access the network). Hook errors (like
- communication problems with the remote machine) shouldn't
- be cached either. */
- if (settings.cacheFailure && !hookError && !fixedOutput)
- foreach (DerivationOutputs::iterator, i, drv.outputs)
- worker.store.registerFailedPath(i->second.path);
-
- worker.permanentFailure = !hookError && !fixedOutput && !diskFull;
amDone(ecFailed);
return;
}
@@ -1825,12 +1834,15 @@ void DerivationGoal::startBuilder()
/* Bind-mount a user-configurable set of directories from the
host file system. */
- foreach (StringSet::iterator, i, settings.dirsInChroot) {
- size_t p = i->find('=');
+ PathSet dirs = tokenizeString<StringSet>(settings.get("build-chroot-dirs", string(DEFAULT_CHROOT_DIRS)));
+ PathSet dirs2 = tokenizeString<StringSet>(settings.get("build-extra-chroot-dirs", string("")));
+ dirs.insert(dirs2.begin(), dirs2.end());
+ for (auto & i : dirs) {
+ size_t p = i.find('=');
if (p == string::npos)
- dirsInChroot[*i] = *i;
+ dirsInChroot[i] = i;
else
- dirsInChroot[string(*i, 0, p)] = string(*i, p + 1);
+ dirsInChroot[string(i, 0, p)] = string(i, p + 1);
}
dirsInChroot[tmpDir] = tmpDir;
@@ -1969,10 +1981,15 @@ void DerivationGoal::startBuilder()
worker.childStarted(shared_from_this(), pid,
singleton<set<int> >(builderOut.readSide), true, true);
+ /* Check if setting up the build environment failed. */
+ string msg = readLine(builderOut.readSide);
+ if (!msg.empty()) throw Error(msg);
+
if (settings.printBuildTrace) {
printMsg(lvlError, format("@ build-started %1% - %2% %3%")
% drvPath % drv.platform % logFile);
}
+
}
@@ -1981,10 +1998,14 @@ void DerivationGoal::initChild()
/* Warning: in the child we should absolutely not make any SQLite
calls! */
- bool inSetup = true;
-
try { /* child */
+ _writeToStderr = 0;
+
+ restoreAffinity();
+
+ commonChildInit(builderOut);
+
#if CHROOT_ENABLED
if (useChroot) {
/* Initialise the loopback interface. */
@@ -2088,9 +2109,9 @@ void DerivationGoal::initChild()
throw SysError("mounting /dev/pts");
createSymlink("/dev/pts/ptmx", chrootRootDir + "/dev/ptmx");
- /* Make sure /dev/pts/ptmx is world-writable. With some
- Linux versions, it is created with permissions 0. */
- chmod_(chrootRootDir + "/dev/pts/ptmx", 0666);
+ /* Make sure /dev/pts/ptmx is world-writable. With some
+ Linux versions, it is created with permissions 0. */
+ chmod_(chrootRootDir + "/dev/pts/ptmx", 0666);
}
/* Do the chroot(). Below we do a chdir() to the
@@ -2103,15 +2124,13 @@ void DerivationGoal::initChild()
}
#endif
- commonChildInit(builderOut);
-
if (chdir(tmpDir.c_str()) == -1)
throw SysError(format("changing into `%1%'") % tmpDir);
/* Close all other file descriptors. */
closeMostFDs(set<int>());
-#ifdef CAN_DO_LINUX32_BUILDS
+#if __linux__
/* Change the personality to 32-bit if we're doing an
i686-linux build on an x86_64-linux machine. */
struct utsname utsbuf;
@@ -2119,7 +2138,7 @@ void DerivationGoal::initChild()
if (drv.platform == "i686-linux" &&
(settings.thisSystem == "x86_64-linux" ||
(!strcmp(utsbuf.sysname, "Linux") && !strcmp(utsbuf.machine, "x86_64")))) {
- if (personality(0x0008 | 0x8000000 /* == PER_LINUX32_3GB */) == -1)
+ if (personality(PER_LINUX32) == -1)
throw SysError("cannot set i686-linux personality");
}
@@ -2129,6 +2148,11 @@ void DerivationGoal::initChild()
int cur = personality(0xffffffff);
if (cur != -1) personality(cur | 0x0020000 /* == UNAME26 */);
}
+
+ /* Disable address space randomization for improved
+ determinism. */
+ int cur = personality(0xffffffff);
+ if (cur != -1) personality(cur | ADDR_NO_RANDOMIZE);
#endif
/* Fill in the environment. */
@@ -2167,21 +2191,28 @@ void DerivationGoal::initChild()
/* Fill in the arguments. */
string builderBasename = baseNameOf(drv.builder);
args.push_back(builderBasename.c_str());
- foreach (Strings::iterator, i, drv.args)
- args.push_back(rewriteHashes(*i, rewritesToTmp).c_str());
+ foreach (Strings::iterator, i, drv.args) {
+ auto re = rewriteHashes(*i, rewritesToTmp);
+ auto cstr = new char[re.length()+1];
+ std::strcpy(cstr, re.c_str());
+
+ args.push_back(cstr);
+ }
args.push_back(0);
restoreSIGPIPE();
+ /* Indicate that we managed to set up the build environment. */
+ writeToStderr("\n");
+
/* Execute the program. This should not return. */
- inSetup = false;
execve(program.c_str(), (char * *) &args[0], (char * *) envArr);
throw SysError(format("executing `%1%'") % drv.builder);
} catch (std::exception & e) {
- writeToStderr("build error: " + string(e.what()) + "\n");
- _exit(inSetup ? childSetupFailed : 1);
+ writeToStderr("while setting up the build environment: " + string(e.what()) + "\n");
+ _exit(1);
}
abort(); /* never reached */
@@ -2333,7 +2364,7 @@ void DerivationGoal::registerOutputs()
if (buildMode == bmCheck) {
ValidPathInfo info = worker.store.queryPathInfo(path);
if (hash.first != info.hash)
- throw Error(format("derivation `%2%' may not be deterministic: hash mismatch in output `%1%'") % drvPath % path);
+ throw Error(format("derivation `%1%' may not be deterministic: hash mismatch in output `%2%'") % drvPath % path);
continue;
}
@@ -2347,16 +2378,36 @@ void DerivationGoal::registerOutputs()
debug(format("referenced input: `%1%'") % *i);
}
- /* If the derivation specifies an `allowedReferences'
- attribute (containing a list of paths that the output may
- refer to), check that all references are in that list. !!!
- allowedReferences should really be per-output. */
- if (drv.env.find("allowedReferences") != drv.env.end()) {
- PathSet allowed = parseReferenceSpecifiers(drv, get(drv.env, "allowedReferences"));
- foreach (PathSet::iterator, i, references)
- if (allowed.find(*i) == allowed.end())
- throw BuildError(format("output is not allowed to refer to path `%1%'") % *i);
- }
+ /* Enforce `allowedReferences' and friends. */
+ auto checkRefs = [&](const string & attrName, bool allowed, bool recursive) {
+ if (drv.env.find(attrName) == drv.env.end()) return;
+
+ PathSet spec = parseReferenceSpecifiers(drv, get(drv.env, attrName));
+
+ PathSet used;
+ if (recursive) {
+ /* Our requisites are the union of the closures of our references. */
+ for (auto & i : references)
+ /* Don't call computeFSClosure on ourselves. */
+ if (actualPath != i)
+ computeFSClosure(worker.store, i, used);
+ } else
+ used = references;
+
+ for (auto & i : used)
+ if (allowed) {
+ if (spec.find(i) == spec.end())
+ throw BuildError(format("output (`%1%') is not allowed to refer to path `%2%'") % actualPath % i);
+ } else {
+ if (spec.find(i) != spec.end())
+ throw BuildError(format("output (`%1%') is not allowed to refer to path `%2%'") % actualPath % i);
+ }
+ };
+
+ checkRefs("allowedReferences", true, false);
+ checkRefs("allowedRequisites", true, true);
+ checkRefs("disallowedReferences", false, false);
+ checkRefs("disallowedRequisites", false, true);
worker.store.optimisePath(path); // FIXME: combine with scanForReferences()
@@ -2586,6 +2637,13 @@ public:
void cancel(bool timeout);
+ string key()
+ {
+ /* "a$" ensures substitution goals happen before derivation
+ goals. */
+ return "a$" + storePathToName(storePath) + "$" + storePath;
+ }
+
void work();
/* The states. */
@@ -2781,32 +2839,18 @@ void SubstitutionGoal::tryToRun()
const char * * argArr = strings2CharPtrs(args);
/* Fork the substitute program. */
- pid = maybeVfork();
-
- switch (pid) {
+ pid = startProcess([&]() {
- case -1:
- throw SysError("unable to fork");
+ commonChildInit(logPipe);
- case 0:
- try { /* child */
+ if (dup2(outPipe.writeSide, STDOUT_FILENO) == -1)
+ throw SysError("cannot dup output pipe into stdout");
- commonChildInit(logPipe);
+ execv(sub.c_str(), (char * *) argArr);
- if (dup2(outPipe.writeSide, STDOUT_FILENO) == -1)
- throw SysError("cannot dup output pipe into stdout");
+ throw SysError(format("executing `%1%'") % sub);
+ });
- execv(sub.c_str(), (char * *) argArr);
-
- throw SysError(format("executing `%1%'") % sub);
-
- } catch (std::exception & e) {
- writeToStderr("substitute error: " + string(e.what()) + "\n");
- }
- _exit(1);
- }
-
- /* parent */
pid.setSeparatePG(true);
pid.setKillSignal(SIGTERM);
outPipe.writeSide.close();
@@ -2944,6 +2988,7 @@ Worker::Worker(LocalStore & store)
nrLocalBuilds = 0;
lastWokenUp = 0;
permanentFailure = false;
+ timedOut = false;
}
@@ -3109,15 +3154,19 @@ void Worker::run(const Goals & _topGoals)
checkInterrupt();
- /* Call every wake goal. */
+ /* Call every wake goal (in the ordering established by
+ CompareGoalPtrs). */
while (!awake.empty() && !topGoals.empty()) {
- WeakGoals awake2(awake);
+ Goals awake2;
+ for (auto & i : awake) {
+ GoalPtr goal = i.lock();
+ if (goal) awake2.insert(goal);
+ }
awake.clear();
- foreach (WeakGoals::iterator, i, awake2) {
+ for (auto & goal : awake2) {
checkInterrupt();
- GoalPtr goal = i->lock();
- if (goal) goal->work();
- if (topGoals.empty()) break;
+ goal->work();
+ if (topGoals.empty()) break; // stuff may have been cancelled
}
}
@@ -3255,6 +3304,7 @@ void Worker::waitForInput()
format("%1% timed out after %2% seconds of silence")
% goal->getName() % settings.maxSilentTime);
goal->cancel(true);
+ timedOut = true;
}
else if (goal->getExitCode() == Goal::ecBusy &&
@@ -3266,6 +3316,7 @@ void Worker::waitForInput()
format("%1% timed out after %2% seconds")
% goal->getName() % settings.buildTimeout);
goal->cancel(true);
+ timedOut = true;
}
}
@@ -3282,7 +3333,7 @@ void Worker::waitForInput()
unsigned int Worker::exitStatus()
{
- return permanentFailure ? 100 : 1;
+ return timedOut ? 101 : (permanentFailure ? 100 : 1);
}
diff --git a/nix/libstore/gc.cc b/nix/libstore/gc.cc
index f90edac1cd..f98e02c1e2 100644
--- a/nix/libstore/gc.cc
+++ b/nix/libstore/gc.cc
@@ -115,7 +115,10 @@ Path addPermRoot(StoreAPI & store, const Path & _storePath,
% gcRoot % rootsDir);
}
- makeSymlink(gcRoot, storePath);
+ if (baseNameOf(gcRoot) == baseNameOf(storePath))
+ writeFile(gcRoot, "");
+ else
+ makeSymlink(gcRoot, storePath);
}
/* Check that the root can be found by the garbage collector.
@@ -142,11 +145,6 @@ Path addPermRoot(StoreAPI & store, const Path & _storePath,
}
-/* The file to which we write our temporary roots. */
-static Path fnTempRoots;
-static AutoCloseFD fdTempRoots;
-
-
void LocalStore::addTempRoot(const Path & path)
{
/* Create the temporary roots file for this process. */
@@ -201,27 +199,6 @@ void LocalStore::addTempRoot(const Path & path)
}
-void removeTempRoots()
-{
- if (fdTempRoots != -1) {
- fdTempRoots.close();
- unlink(fnTempRoots.c_str());
- }
-}
-
-
-/* Automatically clean up the temporary roots file when we exit. */
-struct RemoveTempRoots
-{
- ~RemoveTempRoots()
- {
- removeTempRoots();
- }
-};
-
-static RemoveTempRoots autoRemoveTempRoots __attribute__((unused));
-
-
typedef std::shared_ptr<AutoCloseFD> FDPtr;
typedef list<FDPtr> FDs;
@@ -230,11 +207,11 @@ static void readTempRoots(PathSet & tempRoots, FDs & fds)
{
/* Read the `temproots' directory for per-process temporary root
files. */
- Strings tempRootFiles = readDirectory(
+ DirEntries tempRootFiles = readDirectory(
(format("%1%/%2%") % settings.nixStateDir % tempRootsDir).str());
- foreach (Strings::iterator, i, tempRootFiles) {
- Path path = (format("%1%/%2%/%3%") % settings.nixStateDir % tempRootsDir % *i).str();
+ for (auto & i : tempRootFiles) {
+ Path path = (format("%1%/%2%/%3%") % settings.nixStateDir % tempRootsDir % i.name).str();
debug(format("reading temporary root file `%1%'") % path);
FDPtr fd(new AutoCloseFD(open(path.c_str(), O_RDWR, 0666)));
@@ -294,19 +271,19 @@ static void foundRoot(StoreAPI & store,
}
-static void findRoots(StoreAPI & store, const Path & path, Roots & roots)
+static void findRoots(StoreAPI & store, const Path & path, unsigned char type, Roots & roots)
{
try {
- struct stat st = lstat(path);
+ if (type == DT_UNKNOWN)
+ type = getFileType(path);
- if (S_ISDIR(st.st_mode)) {
- Strings names = readDirectory(path);
- foreach (Strings::iterator, i, names)
- findRoots(store, path + "/" + *i, roots);
+ if (type == DT_DIR) {
+ for (auto & i : readDirectory(path))
+ findRoots(store, path + "/" + i.name, i.type, roots);
}
- else if (S_ISLNK(st.st_mode)) {
+ else if (type == DT_LNK) {
Path target = readLink(path);
if (isInStore(target))
foundRoot(store, path, target, roots);
@@ -328,6 +305,12 @@ static void findRoots(StoreAPI & store, const Path & path, Roots & roots)
}
}
+ else if (type == DT_REG) {
+ Path storePath = settings.nixStore + "/" + baseNameOf(path);
+ if (store.isValidPath(storePath))
+ roots[path] = storePath;
+ }
+
}
catch (SysError & e) {
@@ -345,9 +328,10 @@ Roots LocalStore::findRoots()
Roots roots;
/* Process direct roots in {gcroots,manifests,profiles}. */
- nix::findRoots(*this, settings.nixStateDir + "/" + gcRootsDir, roots);
- nix::findRoots(*this, settings.nixStateDir + "/manifests", roots);
- nix::findRoots(*this, settings.nixStateDir + "/profiles", roots);
+ nix::findRoots(*this, settings.nixStateDir + "/" + gcRootsDir, DT_UNKNOWN, roots);
+ if (pathExists(settings.nixStateDir + "/manifests"))
+ nix::findRoots(*this, settings.nixStateDir + "/manifests", DT_UNKNOWN, roots);
+ nix::findRoots(*this, settings.nixStateDir + "/profiles", DT_UNKNOWN, roots);
return roots;
}
@@ -449,7 +433,6 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
// if the path was not valid, need to determine the actual
// size.
state.bytesInvalidated += size;
- // Mac OS X cannot rename directories if they are read-only.
if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
throw SysError(format("making `%1%' writable") % path);
Path tmp = state.trashDir + "/" + baseNameOf(path);
@@ -649,7 +632,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
/* After this point the set of roots or temporary roots cannot
increase, since we hold locks on everything. So everything
- that is not reachable from `roots'. */
+ that is not reachable from `roots' is garbage. */
if (state.shouldDelete) {
if (pathExists(state.trashDir)) deleteGarbage(state, state.trashDir);
@@ -741,7 +724,7 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
}
/* While we're at it, vacuum the database. */
- if (options.action == GCOptions::gcDeleteDead) vacuumDB();
+ //if (options.action == GCOptions::gcDeleteDead) vacuumDB();
}
diff --git a/nix/libstore/globals.cc b/nix/libstore/globals.cc
index 86fa56739c..bb08a7d0b0 100644
--- a/nix/libstore/globals.cc
+++ b/nix/libstore/globals.cc
@@ -2,6 +2,7 @@
#include "globals.hh"
#include "util.hh"
+#include "archive.hh"
#include <map>
#include <algorithm>
@@ -55,6 +56,7 @@ Settings::Settings()
envKeepDerivations = false;
lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
showTrace = false;
+ enableImportNative = false;
}
@@ -112,35 +114,61 @@ void Settings::set(const string & name, const string & value)
}
+string Settings::get(const string & name, const string & def)
+{
+ auto i = settings.find(name);
+ if (i == settings.end()) return def;
+ return i->second;
+}
+
+
+Strings Settings::get(const string & name, const Strings & def)
+{
+ auto i = settings.find(name);
+ if (i == settings.end()) return def;
+ return tokenizeString<Strings>(i->second);
+}
+
+
+bool Settings::get(const string & name, bool def)
+{
+ bool res = def;
+ _get(res, name);
+ return res;
+}
+
+
void Settings::update()
{
- get(tryFallback, "build-fallback");
- get(maxBuildJobs, "build-max-jobs");
- get(buildCores, "build-cores");
- get(thisSystem, "system");
- get(maxSilentTime, "build-max-silent-time");
- get(buildTimeout, "build-timeout");
- get(reservedSize, "gc-reserved-space");
- get(fsyncMetadata, "fsync-metadata");
- get(useSQLiteWAL, "use-sqlite-wal");
- get(syncBeforeRegistering, "sync-before-registering");
- get(useSubstitutes, "build-use-substitutes");
- get(buildUsersGroup, "build-users-group");
- get(useChroot, "build-use-chroot");
- get(dirsInChroot, "build-chroot-dirs");
- get(impersonateLinux26, "build-impersonate-linux-26");
- get(keepLog, "build-keep-log");
- get(compressLog, "build-compress-log");
- get(maxLogSize, "build-max-log-size");
- get(cacheFailure, "build-cache-failure");
- get(pollInterval, "build-poll-interval");
- get(checkRootReachability, "gc-check-reachability");
- get(gcKeepOutputs, "gc-keep-outputs");
- get(gcKeepDerivations, "gc-keep-derivations");
- get(autoOptimiseStore, "auto-optimise-store");
- get(envKeepDerivations, "env-keep-derivations");
- get(sshSubstituterHosts, "ssh-substituter-hosts");
- get(useSshSubstituter, "use-ssh-substituter");
+ _get(tryFallback, "build-fallback");
+ _get(maxBuildJobs, "build-max-jobs");
+ _get(buildCores, "build-cores");
+ _get(thisSystem, "system");
+ _get(maxSilentTime, "build-max-silent-time");
+ _get(buildTimeout, "build-timeout");
+ _get(reservedSize, "gc-reserved-space");
+ _get(fsyncMetadata, "fsync-metadata");
+ _get(useSQLiteWAL, "use-sqlite-wal");
+ _get(syncBeforeRegistering, "sync-before-registering");
+ _get(useSubstitutes, "build-use-substitutes");
+ _get(buildUsersGroup, "build-users-group");
+ _get(useChroot, "build-use-chroot");
+ _get(impersonateLinux26, "build-impersonate-linux-26");
+ _get(keepLog, "build-keep-log");
+ _get(compressLog, "build-compress-log");
+ _get(maxLogSize, "build-max-log-size");
+ _get(cacheFailure, "build-cache-failure");
+ _get(pollInterval, "build-poll-interval");
+ _get(checkRootReachability, "gc-check-reachability");
+ _get(gcKeepOutputs, "gc-keep-outputs");
+ _get(gcKeepDerivations, "gc-keep-derivations");
+ _get(autoOptimiseStore, "auto-optimise-store");
+ _get(envKeepDerivations, "env-keep-derivations");
+ _get(sshSubstituterHosts, "ssh-substituter-hosts");
+ _get(useSshSubstituter, "use-ssh-substituter");
+ _get(logServers, "log-servers");
+ _get(enableImportNative, "allow-unsafe-native-code-during-evaluation");
+ _get(useCaseHack, "use-case-hack");
string subs = getEnv("NIX_SUBSTITUTERS", "default");
if (subs == "default") {
@@ -158,7 +186,7 @@ void Settings::update()
}
-void Settings::get(string & res, const string & name)
+void Settings::_get(string & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
@@ -166,7 +194,7 @@ void Settings::get(string & res, const string & name)
}
-void Settings::get(bool & res, const string & name)
+void Settings::_get(bool & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
@@ -177,7 +205,7 @@ void Settings::get(bool & res, const string & name)
}
-void Settings::get(StringSet & res, const string & name)
+void Settings::_get(StringSet & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
@@ -186,7 +214,7 @@ void Settings::get(StringSet & res, const string & name)
res.insert(ss.begin(), ss.end());
}
-void Settings::get(Strings & res, const string & name)
+void Settings::_get(Strings & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
@@ -194,7 +222,7 @@ void Settings::get(Strings & res, const string & name)
}
-template<class N> void Settings::get(N & res, const string & name)
+template<class N> void Settings::_get(N & res, const string & name)
{
SettingsMap::iterator i = settings.find(name);
if (i == settings.end()) return;
diff --git a/nix/libstore/globals.hh b/nix/libstore/globals.hh
index 711c365294..c17e10d7c3 100644
--- a/nix/libstore/globals.hh
+++ b/nix/libstore/globals.hh
@@ -21,6 +21,12 @@ struct Settings {
void set(const string & name, const string & value);
+ string get(const string & name, const string & def);
+
+ Strings get(const string & name, const Strings & def);
+
+ bool get(const string & name, bool def);
+
void update();
string pack();
@@ -142,10 +148,6 @@ struct Settings {
/* Whether to build in chroot. */
bool useChroot;
- /* The directories from the host filesystem to be included in the
- chroot. */
- StringSet dirsInChroot;
-
/* Set of ssh connection strings for the ssh substituter */
Strings sshSubstituterHosts;
@@ -197,14 +199,20 @@ struct Settings {
/* Whether to show a stack trace if Nix evaluation fails. */
bool showTrace;
+ /* A list of URL prefixes that can return Nix build logs. */
+ Strings logServers;
+
+ /* Whether the importNative primop should be enabled */
+ bool enableImportNative;
+
private:
SettingsMap settings, overrides;
- void get(string & res, const string & name);
- void get(bool & res, const string & name);
- void get(StringSet & res, const string & name);
- void get(Strings & res, const string & name);
- template<class N> void get(N & res, const string & name);
+ void _get(string & res, const string & name);
+ void _get(bool & res, const string & name);
+ void _get(StringSet & res, const string & name);
+ void _get(Strings & res, const string & name);
+ template<class N> void _get(N & res, const string & name);
};
diff --git a/nix/libstore/local-store.cc b/nix/libstore/local-store.cc
index 2c3d65215c..a890ab56b3 100644
--- a/nix/libstore/local-store.cc
+++ b/nix/libstore/local-store.cc
@@ -358,7 +358,17 @@ LocalStore::~LocalStore()
i->second.to.close();
i->second.from.close();
i->second.error.close();
- i->second.pid.wait(true);
+ if (i->second.pid != -1)
+ i->second.pid.wait(true);
+ }
+ } catch (...) {
+ ignoreException();
+ }
+
+ try {
+ if (fdTempRoots != -1) {
+ fdTempRoots.close();
+ unlink(fnTempRoots.c_str());
}
} catch (...) {
ignoreException();
@@ -551,9 +561,9 @@ static void canonicalisePathMetaData_(const Path & path, uid_t fromUid, InodesSe
if (lstat(path.c_str(), &st))
throw SysError(format("getting attributes of path `%1%'") % path);
- /* Really make sure that the path is of a supported type. This
- has already been checked in dumpPath(). */
- assert(S_ISREG(st.st_mode) || S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode));
+ /* Really make sure that the path is of a supported type. */
+ if (!(S_ISREG(st.st_mode) || S_ISDIR(st.st_mode) || S_ISLNK(st.st_mode)))
+ throw Error(format("file ‘%1%’ has an unsupported type") % path);
/* Fail if the file is not owned by the build user. This prevents
us from messing up the ownership/permissions of files
@@ -593,9 +603,9 @@ static void canonicalisePathMetaData_(const Path & path, uid_t fromUid, InodesSe
}
if (S_ISDIR(st.st_mode)) {
- Strings names = readDirectory(path);
- foreach (Strings::iterator, i, names)
- canonicalisePathMetaData_(path + "/" + *i, fromUid, inodesSeen);
+ DirEntries entries = readDirectory(path);
+ for (auto & i : entries)
+ canonicalisePathMetaData_(path + "/" + i.name, fromUid, inodesSeen);
}
}
@@ -1083,31 +1093,16 @@ void LocalStore::startSubstituter(const Path & substituter, RunningSubstituter &
setSubstituterEnv();
- run.pid = maybeVfork();
-
- switch (run.pid) {
-
- case -1:
- throw SysError("unable to fork");
-
- case 0: /* child */
- try {
- restoreAffinity();
- if (dup2(toPipe.readSide, STDIN_FILENO) == -1)
- throw SysError("dupping stdin");
- if (dup2(fromPipe.writeSide, STDOUT_FILENO) == -1)
- throw SysError("dupping stdout");
- if (dup2(errorPipe.writeSide, STDERR_FILENO) == -1)
- throw SysError("dupping stderr");
- execl(substituter.c_str(), substituter.c_str(), "--query", NULL);
- throw SysError(format("executing `%1%'") % substituter);
- } catch (std::exception & e) {
- std::cerr << "error: " << e.what() << std::endl;
- }
- _exit(1);
- }
-
- /* Parent. */
+ run.pid = startProcess([&]() {
+ if (dup2(toPipe.readSide, STDIN_FILENO) == -1)
+ throw SysError("dupping stdin");
+ if (dup2(fromPipe.writeSide, STDOUT_FILENO) == -1)
+ throw SysError("dupping stdout");
+ if (dup2(errorPipe.writeSide, STDERR_FILENO) == -1)
+ throw SysError("dupping stderr");
+ execl(substituter.c_str(), substituter.c_str(), "--query", NULL);
+ throw SysError(format("executing `%1%'") % substituter);
+ });
run.program = baseNameOf(substituter);
run.to = toPipe.writeSide.borrow();
@@ -1170,8 +1165,7 @@ string LocalStore::getLineFromSubstituter(RunningSubstituter & run)
string::size_type p;
while (((p = err.find('\n')) != string::npos)
|| ((p = err.find('\r')) != string::npos)) {
- string thing(err, 0, p + 1);
- writeToStderr(run.program + ": " + thing);
+ printMsg(lvlError, run.program + ": " + string(err, 0, p));
err = string(err, p + 1);
}
}
@@ -1503,7 +1497,8 @@ void LocalStore::exportPath(const Path & path, bool sign,
{
assertStorePath(path);
- addTempRoot(path);
+ printMsg(lvlInfo, format("exporting path `%1%'") % path);
+
if (!isValidPath(path))
throw Error(format("path `%1%' is not valid") % path);
@@ -1613,8 +1608,6 @@ Path LocalStore::importPath(bool requireSignature, Source & source)
Path dstPath = readStorePath(hashAndReadSource);
- printMsg(lvlInfo, format("importing path `%1%'") % dstPath);
-
PathSet references = readStorePaths<PathSet>(hashAndReadSource);
Path deriver = readString(hashAndReadSource);
@@ -1747,8 +1740,8 @@ bool LocalStore::verifyStore(bool checkContents, bool repair)
/* Acquire the global GC lock to prevent a garbage collection. */
AutoCloseFD fdGCLock = openGCLock(ltWrite);
- Paths entries = readDirectory(settings.nixStore);
- PathSet store(entries.begin(), entries.end());
+ PathSet store;
+ for (auto & i : readDirectory(settings.nixStore)) store.insert(i.name);
/* Check whether all valid paths actually exist. */
printMsg(lvlInfo, "checking path existence...");
@@ -1898,9 +1891,8 @@ void LocalStore::markContentsGood(const Path & path)
PathSet LocalStore::queryValidPathsOld()
{
PathSet paths;
- Strings entries = readDirectory(settings.nixDBPath + "/info");
- foreach (Strings::iterator, i, entries)
- if (i->at(0) != '.') paths.insert(settings.nixStore + "/" + *i);
+ for (auto & i : readDirectory(settings.nixDBPath + "/info"))
+ if (i.name.at(0) != '.') paths.insert(settings.nixStore + "/" + i.name);
return paths;
}
@@ -1987,9 +1979,8 @@ static void makeMutable(const Path & path)
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode)) return;
if (S_ISDIR(st.st_mode)) {
- Strings names = readDirectory(path);
- foreach (Strings::iterator, i, names)
- makeMutable(path + "/" + *i);
+ for (auto & i : readDirectory(path))
+ makeMutable(path + "/" + i.name);
}
/* The O_NOFOLLOW is important to prevent us from changing the
diff --git a/nix/libstore/local-store.hh b/nix/libstore/local-store.hh
index 54331e448a..e0aabdba42 100644
--- a/nix/libstore/local-store.hh
+++ b/nix/libstore/local-store.hh
@@ -1,16 +1,12 @@
#pragma once
#include <string>
+#include <unordered_set>
#include "store-api.hh"
#include "util.hh"
#include "pathlocks.hh"
-#if HAVE_TR1_UNORDERED_SET
-#include <tr1/unordered_set>
-#endif
-
-
class sqlite3;
class sqlite3_stmt;
@@ -171,6 +167,9 @@ public:
files with the same contents. */
void optimiseStore(OptimiseStats & stats);
+ /* Generic variant of the above method. */
+ void optimiseStore();
+
/* Optimise a single store path. */
void optimisePath(const Path & path);
@@ -245,6 +244,10 @@ private:
bool didSetSubstituterEnv;
+ /* The file to which we write our temporary roots. */
+ Path fnTempRoots;
+ AutoCloseFD fdTempRoots;
+
int getSchema();
void openDB(bool create);
@@ -306,11 +309,7 @@ private:
void checkDerivationOutputs(const Path & drvPath, const Derivation & drv);
-#if HAVE_TR1_UNORDERED_SET
- typedef std::tr1::unordered_set<ino_t> InodeHash;
-#else
- typedef std::set<ino_t> InodeHash;
-#endif
+ typedef std::unordered_set<ino_t> InodeHash;
InodeHash loadInodeHash();
Strings readDirectoryIgnoringInodes(const Path & path, const InodeHash & inodeHash);
diff --git a/nix/libstore/optimise-store.cc b/nix/libstore/optimise-store.cc
index 67ee94a4bd..8ba9d1a263 100644
--- a/nix/libstore/optimise-store.cc
+++ b/nix/libstore/optimise-store.cc
@@ -225,6 +225,22 @@ void LocalStore::optimiseStore(OptimiseStats & stats)
}
}
+static string showBytes(unsigned long long bytes)
+{
+ return (format("%.2f MiB") % (bytes / (1024.0 * 1024.0))).str();
+}
+
+void LocalStore::optimiseStore()
+{
+ OptimiseStats stats;
+
+ optimiseStore(stats);
+
+ printMsg(lvlError,
+ format("%1% freed by hard-linking %2% files")
+ % showBytes(stats.bytesFreed)
+ % stats.filesLinked);
+}
void LocalStore::optimisePath(const Path & path)
{
diff --git a/nix/libstore/remote-store.cc b/nix/libstore/remote-store.cc
index 4619206932..448d9b6bc1 100644
--- a/nix/libstore/remote-store.cc
+++ b/nix/libstore/remote-store.cc
@@ -87,8 +87,7 @@ void RemoteStore::openConnection(bool reserveSpace)
processStderr();
}
catch (Error & e) {
- throw Error(format("cannot start worker (%1%)")
- % e.msg());
+ throw Error(format("cannot start daemon worker: %1%") % e.msg());
}
setOptions();
@@ -133,8 +132,6 @@ RemoteStore::~RemoteStore()
try {
to.flush();
fdSocket.close();
- if (child != -1)
- child.wait(true);
} catch (...) {
ignoreException();
}
@@ -402,8 +399,23 @@ Path RemoteStore::addToStore(const Path & _srcPath,
writeInt((hashAlgo == htSHA256 && recursive) ? 0 : 1, to);
writeInt(recursive ? 1 : 0, to);
writeString(printHashType(hashAlgo), to);
- dumpPath(srcPath, to, filter);
- processStderr();
+
+ try {
+ to.written = 0;
+ to.warn = true;
+ dumpPath(srcPath, to, filter);
+ to.warn = false;
+ processStderr();
+ } catch (SysError & e) {
+ /* Daemon closed while we were sending the path. Probably OOM
+ or I/O error. */
+ if (e.errNo == EPIPE)
+ try {
+ processStderr();
+ } catch (EndOfFile & e) { }
+ throw;
+ }
+
return readStorePath(from);
}
@@ -564,6 +576,13 @@ void RemoteStore::clearFailedPaths(const PathSet & paths)
readInt(from);
}
+void RemoteStore::optimiseStore()
+{
+ openConnection();
+ writeInt(wopOptimiseStore, to);
+ processStderr();
+ readInt(from);
+}
void RemoteStore::processStderr(Sink * sink, Source * source)
{
diff --git a/nix/libstore/remote-store.hh b/nix/libstore/remote-store.hh
index 04b60fce4b..98774c10b3 100644
--- a/nix/libstore/remote-store.hh
+++ b/nix/libstore/remote-store.hh
@@ -82,12 +82,13 @@ public:
PathSet queryFailedPaths();
void clearFailedPaths(const PathSet & paths);
-
+
+ void optimiseStore();
+
private:
AutoCloseFD fdSocket;
FdSink to;
FdSource from;
- Pid child;
unsigned int daemonVersion;
bool initialised;
diff --git a/nix/libstore/store-api.hh b/nix/libstore/store-api.hh
index b635fee2cf..3109f100ef 100644
--- a/nix/libstore/store-api.hh
+++ b/nix/libstore/store-api.hh
@@ -250,6 +250,10 @@ public:
`nix-store --register-validity'. */
string makeValidityRegistration(const PathSet & paths,
bool showDerivers, bool showHash);
+
+ /* Optimise the disk space usage of the Nix store by hard-linking files
+ with the same contents. */
+ virtual void optimiseStore() = 0;
};
diff --git a/nix/libstore/worker-protocol.hh b/nix/libstore/worker-protocol.hh
index 9317f89c37..4b040b77ce 100644
--- a/nix/libstore/worker-protocol.hh
+++ b/nix/libstore/worker-protocol.hh
@@ -12,7 +12,6 @@ namespace nix {
typedef enum {
- wopQuit = 0,
wopIsValidPath = 1,
wopHasSubstitutes = 3,
wopQueryPathHash = 4,
@@ -43,6 +42,7 @@ typedef enum {
wopQueryValidPaths = 31,
wopQuerySubstitutablePaths = 32,
wopQueryValidDerivers = 33,
+ wopOptimiseStore = 34
} WorkerOp;
diff --git a/nix/libutil/archive.cc b/nix/libutil/archive.cc
index 70a1c580dd..6856ea0f28 100644
--- a/nix/libutil/archive.cc
+++ b/nix/libutil/archive.cc
@@ -1,10 +1,14 @@
+#define _XOPEN_SOURCE 600
+
#include "config.h"
#include <cerrno>
#include <algorithm>
#include <vector>
+#include <map>
+
+#include <strings.h> // for strcasecmp
-#define _XOPEN_SOURCE 600
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
@@ -18,39 +22,21 @@
namespace nix {
+bool useCaseHack =
+#if __APPLE__
+ true;
+#else
+ false;
+#endif
+
static string archiveVersion1 = "nix-archive-1";
+static string caseHackSuffix = "~nix~case~hack~";
PathFilter defaultPathFilter;
-static void dump(const string & path, Sink & sink, PathFilter & filter);
-
-
-static void dumpEntries(const Path & path, Sink & sink, PathFilter & filter)
-{
- Strings names = readDirectory(path);
- vector<string> names2(names.begin(), names.end());
- sort(names2.begin(), names2.end());
-
- for (vector<string>::iterator i = names2.begin();
- i != names2.end(); ++i)
- {
- Path entry = path + "/" + *i;
- if (filter(entry)) {
- writeString("entry", sink);
- writeString("(", sink);
- writeString("name", sink);
- writeString(*i, sink);
- writeString("node", sink);
- dump(entry, sink, filter);
- writeString(")", sink);
- }
- }
-}
-
-
-static void dumpContents(const Path & path, size_t size,
+static void dumpContents(const Path & path, size_t size,
Sink & sink)
{
writeString("contents", sink);
@@ -58,7 +44,7 @@ static void dumpContents(const Path & path, size_t size,
AutoCloseFD fd = open(path.c_str(), O_RDONLY);
if (fd == -1) throw SysError(format("opening file `%1%'") % path);
-
+
unsigned char buf[65536];
size_t left = size;
@@ -89,12 +75,40 @@ static void dump(const Path & path, Sink & sink, PathFilter & filter)
writeString("", sink);
}
dumpContents(path, (size_t) st.st_size, sink);
- }
+ }
else if (S_ISDIR(st.st_mode)) {
writeString("type", sink);
writeString("directory", sink);
- dumpEntries(path, sink, filter);
+
+ /* If we're on a case-insensitive system like Mac OS X, undo
+ the case hack applied by restorePath(). */
+ std::map<string, string> unhacked;
+ for (auto & i : readDirectory(path))
+ if (useCaseHack) {
+ string name(i.name);
+ size_t pos = i.name.find(caseHackSuffix);
+ if (pos != string::npos) {
+ printMsg(lvlDebug, format("removing case hack suffix from `%1%'") % (path + "/" + i.name));
+ name.erase(pos);
+ }
+ if (unhacked.find(name) != unhacked.end())
+ throw Error(format("file name collision in between `%1%' and `%2%'")
+ % (path + "/" + unhacked[name]) % (path + "/" + i.name));
+ unhacked[name] = i.name;
+ } else
+ unhacked[i.name] = i.name;
+
+ for (auto & i : unhacked)
+ if (filter(path + "/" + i.first)) {
+ writeString("entry", sink);
+ writeString("(", sink);
+ writeString("name", sink);
+ writeString(i.first, sink);
+ writeString("node", sink);
+ dump(path + "/" + i.second, sink, filter);
+ writeString(")", sink);
+ }
}
else if (S_ISLNK(st.st_mode)) {
@@ -123,6 +137,7 @@ static SerialisationError badArchive(string s)
}
+#if 0
static void skipGeneric(Source & source)
{
if (readString(source) == "(") {
@@ -130,43 +145,13 @@ static void skipGeneric(Source & source)
skipGeneric(source);
}
}
-
-
-static void parse(ParseSink & sink, Source & source, const Path & path);
-
-
-
-static void parseEntry(ParseSink & sink, Source & source, const Path & path)
-{
- string s, name;
-
- s = readString(source);
- if (s != "(") throw badArchive("expected open tag");
-
- while (1) {
- checkInterrupt();
-
- s = readString(source);
-
- if (s == ")") {
- break;
- } else if (s == "name") {
- name = readString(source);
- } else if (s == "node") {
- if (s == "") throw badArchive("entry name missing");
- parse(sink, source, path + "/" + name);
- } else {
- throw badArchive("unknown field " + s);
- skipGeneric(source);
- }
- }
-}
+#endif
static void parseContents(ParseSink & sink, Source & source, const Path & path)
{
unsigned long long size = readLongLong(source);
-
+
sink.preallocateContents(size);
unsigned long long left = size;
@@ -185,6 +170,15 @@ static void parseContents(ParseSink & sink, Source & source, const Path & path)
}
+struct CaseInsensitiveCompare
+{
+ bool operator() (const string & a, const string & b) const
+ {
+ return strcasecmp(a.c_str(), b.c_str()) < 0;
+ }
+};
+
+
static void parse(ParseSink & sink, Source & source, const Path & path)
{
string s;
@@ -194,6 +188,8 @@ static void parse(ParseSink & sink, Source & source, const Path & path)
enum { tpUnknown, tpRegular, tpDirectory, tpSymlink } type = tpUnknown;
+ std::map<Path, int, CaseInsensitiveCompare> names;
+
while (1) {
checkInterrupt();
@@ -221,9 +217,9 @@ static void parse(ParseSink & sink, Source & source, const Path & path)
else if (t == "symlink") {
type = tpSymlink;
}
-
+
else throw badArchive("unknown file type " + t);
-
+
}
else if (s == "contents" && type == tpRegular) {
@@ -236,7 +232,40 @@ static void parse(ParseSink & sink, Source & source, const Path & path)
}
else if (s == "entry" && type == tpDirectory) {
- parseEntry(sink, source, path);
+ string name, prevName;
+
+ s = readString(source);
+ if (s != "(") throw badArchive("expected open tag");
+
+ while (1) {
+ checkInterrupt();
+
+ s = readString(source);
+
+ if (s == ")") {
+ break;
+ } else if (s == "name") {
+ name = readString(source);
+ if (name.empty() || name == "." || name == ".." || name.find('/') != string::npos || name.find((char) 0) != string::npos)
+ throw Error(format("NAR contains invalid file name `%1%'") % name);
+ if (name <= prevName)
+ throw Error("NAR directory is not sorted");
+ prevName = name;
+ if (useCaseHack) {
+ auto i = names.find(name);
+ if (i != names.end()) {
+ printMsg(lvlDebug, format("case collision between `%1%' and `%2%'") % i->first % name);
+ name += caseHackSuffix;
+ name += int2String(++i->second);
+ } else
+ names[name] = 0;
+ }
+ } else if (s == "node") {
+ if (s.empty()) throw badArchive("entry name missing");
+ parse(sink, source, path + "/" + name);
+ } else
+ throw badArchive("unknown field " + s);
+ }
}
else if (s == "target" && type == tpSymlink) {
@@ -244,17 +273,15 @@ static void parse(ParseSink & sink, Source & source, const Path & path)
sink.createSymlink(path, target);
}
- else {
+ else
throw badArchive("unknown field " + s);
- skipGeneric(source);
- }
}
}
void parseDump(ParseSink & sink, Source & source)
{
- string version;
+ string version;
try {
version = readString(source);
} catch (SerialisationError & e) {
@@ -323,7 +350,7 @@ struct RestoreSink : ParseSink
}
};
-
+
void restorePath(const Path & path, Source & source)
{
RestoreSink sink;
@@ -331,5 +358,5 @@ void restorePath(const Path & path, Source & source)
parseDump(sink, source);
}
-
+
}
diff --git a/nix/libutil/archive.hh b/nix/libutil/archive.hh
index ccac92074d..c216e9768f 100644
--- a/nix/libutil/archive.hh
+++ b/nix/libutil/archive.hh
@@ -28,7 +28,7 @@ namespace nix {
where:
- attrs(as) = concat(map(attr, as)) + encN(0)
+ attrs(as) = concat(map(attr, as)) + encN(0)
attrs((a, b)) = encS(a) + encS(b)
encS(s) = encN(len(s)) + s + (padding until next 64-bit boundary)
@@ -58,7 +58,7 @@ void dumpPath(const Path & path, Sink & sink,
struct ParseSink
{
virtual void createDirectory(const Path & path) { };
-
+
virtual void createRegularFile(const Path & path) { };
virtual void isExecutable() { };
virtual void preallocateContents(unsigned long long size) { };
@@ -66,10 +66,14 @@ struct ParseSink
virtual void createSymlink(const Path & path, const string & target) { };
};
-
+
void parseDump(ParseSink & sink, Source & source);
void restorePath(const Path & path, Source & source);
-
+
+// FIXME: global variables are bad m'kay.
+extern bool useCaseHack;
+
+
}
diff --git a/nix/libutil/serialise.cc b/nix/libutil/serialise.cc
index 6b71f52c15..9241750750 100644
--- a/nix/libutil/serialise.cc
+++ b/nix/libutil/serialise.cc
@@ -54,8 +54,24 @@ FdSink::~FdSink()
}
+size_t threshold = 256 * 1024 * 1024;
+
+static void warnLargeDump()
+{
+ printMsg(lvlError, "warning: dumping very large path (> 256 MiB); this may run out of memory");
+}
+
+
void FdSink::write(const unsigned char * data, size_t len)
{
+ static bool warned = false;
+ if (warn && !warned) {
+ written += len;
+ if (written > threshold) {
+ warnLargeDump();
+ warned = true;
+ }
+ }
writeFull(fd, data, len);
}
@@ -256,4 +272,15 @@ template Paths readStrings(Source & source);
template PathSet readStrings(Source & source);
+void StringSink::operator () (const unsigned char * data, size_t len)
+{
+ static bool warned = false;
+ if (!warned && s.size() > threshold) {
+ warnLargeDump();
+ warned = true;
+ }
+ s.append((const char *) data, len);
+}
+
+
}
diff --git a/nix/libutil/serialise.hh b/nix/libutil/serialise.hh
index e5a9df1d05..6a6f028aa6 100644
--- a/nix/libutil/serialise.hh
+++ b/nix/libutil/serialise.hh
@@ -72,9 +72,11 @@ struct BufferedSource : Source
struct FdSink : BufferedSink
{
int fd;
+ bool warn;
+ size_t written;
- FdSink() : fd(-1) { }
- FdSink(int fd) : fd(fd) { }
+ FdSink() : fd(-1), warn(false), written(0) { }
+ FdSink(int fd) : fd(fd), warn(false), written(0) { }
~FdSink();
void write(const unsigned char * data, size_t len);
@@ -95,10 +97,7 @@ struct FdSource : BufferedSource
struct StringSink : Sink
{
string s;
- void operator () (const unsigned char * data, size_t len)
- {
- s.append((const char *) data, len);
- }
+ void operator () (const unsigned char * data, size_t len);
};
diff --git a/nix/libutil/types.hh b/nix/libutil/types.hh
index 4b5ce9a78c..160884ee1a 100644
--- a/nix/libutil/types.hh
+++ b/nix/libutil/types.hh
@@ -8,6 +8,15 @@
#include <boost/format.hpp>
+/* Before 4.7, gcc's std::exception uses empty throw() specifiers for
+ * its (virtual) destructor and what() in c++11 mode, in violation of spec
+ */
+#ifdef __GNUC__
+#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
+#define EXCEPTION_NEEDS_THROW_SPEC
+#endif
+#endif
+
namespace nix {
@@ -39,10 +48,14 @@ protected:
public:
unsigned int status; // exit status
BaseError(const FormatOrString & fs, unsigned int status = 1);
+#ifdef EXCEPTION_NEEDS_THROW_SPEC
~BaseError() throw () { };
const char * what() const throw () { return err.c_str(); }
- const string & msg() const throw () { return err; }
- const string & prefix() const throw () { return prefix_; }
+#else
+ const char * what() const noexcept { return err.c_str(); }
+#endif
+ const string & msg() const { return err; }
+ const string & prefix() const { return prefix_; }
BaseError & addPrefix(const FormatOrString & fs);
};
diff --git a/nix/libutil/util.cc b/nix/libutil/util.cc
index 846674a29d..a4a1ddb12a 100644
--- a/nix/libutil/util.cc
+++ b/nix/libutil/util.cc
@@ -1,5 +1,8 @@
#include "config.h"
+#include "util.hh"
+#include "affinity.hh"
+
#include <iostream>
#include <cerrno>
#include <cstdio>
@@ -16,8 +19,6 @@
#include <sys/syscall.h>
#endif
-#include "util.hh"
-
extern char * * environ;
@@ -125,7 +126,6 @@ Path canonPath(const Path & path, bool resolveSymlinks)
i = temp.begin(); /* restart */
end = temp.end();
s = "";
- /* !!! potential for infinite loop */
}
}
}
@@ -202,9 +202,10 @@ bool isLink(const Path & path)
}
-Strings readDirectory(const Path & path)
+DirEntries readDirectory(const Path & path)
{
- Strings names;
+ DirEntries entries;
+ entries.reserve(64);
AutoCloseDir dir = opendir(path.c_str());
if (!dir) throw SysError(format("opening directory `%1%'") % path);
@@ -214,11 +215,21 @@ Strings readDirectory(const Path & path)
checkInterrupt();
string name = dirent->d_name;
if (name == "." || name == "..") continue;
- names.push_back(name);
+ entries.emplace_back(name, dirent->d_ino, dirent->d_type);
}
if (errno) throw SysError(format("reading directory `%1%'") % path);
- return names;
+ return entries;
+}
+
+
+unsigned char getFileType(const Path & path)
+{
+ struct stat st = lstat(path);
+ if (S_ISDIR(st.st_mode)) return DT_DIR;
+ if (S_ISLNK(st.st_mode)) return DT_LNK;
+ if (S_ISREG(st.st_mode)) return DT_REG;
+ return DT_UNKNOWN;
}
@@ -293,16 +304,14 @@ static void _deletePath(const Path & path, unsigned long long & bytesFreed)
bytesFreed += st.st_blocks * 512;
if (S_ISDIR(st.st_mode)) {
- Strings names = readDirectory(path);
-
/* Make the directory writable. */
if (!(st.st_mode & S_IWUSR)) {
if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
throw SysError(format("making `%1%' writable") % path);
}
- for (Strings::iterator i = names.begin(); i != names.end(); ++i)
- _deletePath(path + "/" + *i, bytesFreed);
+ for (auto & i : readDirectory(path))
+ _deletePath(path + "/" + i.name, bytesFreed);
}
if (remove(path.c_str()) == -1)
@@ -380,6 +389,9 @@ Paths createDirs(const Path & path)
created.push_back(path);
}
+ if (S_ISLNK(st.st_mode) && stat(path.c_str(), &st) == -1)
+ throw SysError(format("statting symlink `%1%'") % path);
+
if (!S_ISDIR(st.st_mode)) throw Error(format("`%1%' is not a directory") % path);
return created;
@@ -466,10 +478,18 @@ void warnOnce(bool & haveWarned, const FormatOrString & fs)
}
+static void defaultWriteToStderr(const unsigned char * buf, size_t count)
+{
+ writeFull(STDERR_FILENO, buf, count);
+}
+
+
void writeToStderr(const string & s)
{
try {
- _writeToStderr((const unsigned char *) s.data(), s.size());
+ auto p = _writeToStderr;
+ if (!p) p = defaultWriteToStderr;
+ p((const unsigned char *) s.data(), s.size());
} catch (SysError & e) {
/* Ignore failing writes to stderr if we're in an exception
handler, otherwise throw an exception. We need to ignore
@@ -481,12 +501,6 @@ void writeToStderr(const string & s)
}
-static void defaultWriteToStderr(const unsigned char * buf, size_t count)
-{
- writeFull(STDERR_FILENO, buf, count);
-}
-
-
void (*_writeToStderr) (const unsigned char * buf, size_t count) = defaultWriteToStderr;
@@ -707,10 +721,14 @@ void AutoCloseDir::close()
Pid::Pid()
+ : pid(-1), separatePG(false), killSignal(SIGKILL)
+{
+}
+
+
+Pid::Pid(pid_t pid)
+ : pid(pid), separatePG(false), killSignal(SIGKILL)
{
- pid = -1;
- separatePG = false;
- killSignal = SIGKILL;
}
@@ -734,11 +752,12 @@ Pid::operator pid_t()
}
-void Pid::kill()
+void Pid::kill(bool quiet)
{
if (pid == -1 || pid == 0) return;
- printMsg(lvlError, format("killing process %1%") % pid);
+ if (!quiet)
+ printMsg(lvlError, format("killing process %1%") % pid);
/* Send the requested signal to the child. If it has its own
process group, send the signal to every process in the child
@@ -801,43 +820,30 @@ void killUser(uid_t uid)
users to which the current process can send signals. So we
fork a process, switch to uid, and send a mass kill. */
- Pid pid;
- pid = fork();
- switch (pid) {
+ Pid pid = startProcess([&]() {
- case -1:
- throw SysError("unable to fork");
+ if (setuid(uid) == -1)
+ throw SysError("setting uid");
- case 0:
- try { /* child */
-
- if (setuid(uid) == -1)
- throw SysError("setting uid");
-
- while (true) {
+ while (true) {
#ifdef __APPLE__
- /* OSX's kill syscall takes a third parameter that, among other
- things, determines if kill(-1, signo) affects the calling
- process. In the OSX libc, it's set to true, which means
- "follow POSIX", which we don't want here
+ /* OSX's kill syscall takes a third parameter that, among
+ other things, determines if kill(-1, signo) affects the
+ calling process. In the OSX libc, it's set to true,
+ which means "follow POSIX", which we don't want here
*/
- if (syscall(SYS_kill, -1, SIGKILL, false) == 0) break;
+ if (syscall(SYS_kill, -1, SIGKILL, false) == 0) break;
#else
- if (kill(-1, SIGKILL) == 0) break;
+ if (kill(-1, SIGKILL) == 0) break;
#endif
- if (errno == ESRCH) break; /* no more processes */
- if (errno != EINTR)
- throw SysError(format("cannot kill processes for uid `%1%'") % uid);
- }
-
- } catch (std::exception & e) {
- writeToStderr((format("killing processes belonging to uid `%1%': %2%\n") % uid % e.what()).str());
- _exit(1);
+ if (errno == ESRCH) break; /* no more processes */
+ if (errno != EINTR)
+ throw SysError(format("cannot kill processes for uid `%1%'") % uid);
}
+
_exit(0);
- }
+ });
- /* parent */
int status = pid.wait(true);
if (status != 0)
throw Error(format("cannot kill processes for uid `%1%': %2%") % uid % statusToString(status));
@@ -852,6 +858,32 @@ void killUser(uid_t uid)
//////////////////////////////////////////////////////////////////////
+pid_t startProcess(std::function<void()> fun,
+ bool dieWithParent, const string & errorPrefix, bool runExitHandlers)
+{
+ pid_t pid = fork();
+ if (pid == -1) throw SysError("unable to fork");
+
+ if (pid == 0) {
+ _writeToStderr = 0;
+ try {
+ restoreAffinity();
+ fun();
+ } catch (std::exception & e) {
+ try {
+ std::cerr << errorPrefix << e.what() << "\n";
+ } catch (...) { }
+ } catch (...) { }
+ if (runExitHandlers)
+ exit(1);
+ else
+ _exit(1);
+ }
+
+ return pid;
+}
+
+
string runProgram(Path program, bool searchPath, const Strings & args)
{
checkInterrupt();
@@ -867,32 +899,17 @@ string runProgram(Path program, bool searchPath, const Strings & args)
pipe.create();
/* Fork. */
- Pid pid;
- pid = maybeVfork();
-
- switch (pid) {
-
- case -1:
- throw SysError("unable to fork");
+ Pid pid = startProcess([&]() {
+ if (dup2(pipe.writeSide, STDOUT_FILENO) == -1)
+ throw SysError("dupping stdout");
- case 0: /* child */
- try {
- if (dup2(pipe.writeSide, STDOUT_FILENO) == -1)
- throw SysError("dupping stdout");
-
- if (searchPath)
- execvp(program.c_str(), (char * *) &cargs[0]);
- else
- execv(program.c_str(), (char * *) &cargs[0]);
- throw SysError(format("executing `%1%'") % program);
-
- } catch (std::exception & e) {
- writeToStderr("error: " + string(e.what()) + "\n");
- }
- _exit(1);
- }
+ if (searchPath)
+ execvp(program.c_str(), (char * *) &cargs[0]);
+ else
+ execv(program.c_str(), (char * *) &cargs[0]);
- /* Parent. */
+ throw SysError(format("executing `%1%'") % program);
+ });
pipe.writeSide.close();
@@ -901,7 +918,7 @@ string runProgram(Path program, bool searchPath, const Strings & args)
/* Wait for the child to finish. */
int status = pid.wait(true);
if (!statusOk(status))
- throw Error(format("program `%1%' %2%")
+ throw ExecError(format("program `%1%' %2%")
% program % statusToString(status));
return result;
@@ -928,13 +945,6 @@ void closeOnExec(int fd)
}
-#if HAVE_VFORK
-pid_t (*maybeVfork)() = vfork;
-#else
-pid_t (*maybeVfork)() = fork;
-#endif
-
-
//////////////////////////////////////////////////////////////////////
diff --git a/nix/libutil/util.hh b/nix/libutil/util.hh
index ce2d77c19a..0ad0026711 100644
--- a/nix/libutil/util.hh
+++ b/nix/libutil/util.hh
@@ -7,6 +7,7 @@
#include <dirent.h>
#include <unistd.h>
#include <signal.h>
+#include <functional>
#include <cstdio>
@@ -63,7 +64,20 @@ bool isLink(const Path & path);
/* Read the contents of a directory. The entries `.' and `..' are
removed. */
-Strings readDirectory(const Path & path);
+struct DirEntry
+{
+ string name;
+ ino_t ino;
+ unsigned char type; // one of DT_*
+ DirEntry(const string & name, ino_t ino, unsigned char type)
+ : name(name), ino(ino), type(type) { }
+};
+
+typedef vector<DirEntry> DirEntries;
+
+DirEntries readDirectory(const Path & path);
+
+unsigned char getFileType(const Path & path);
/* Read the contents of a file into a string. */
string readFile(int fd);
@@ -237,10 +251,11 @@ class Pid
int killSignal;
public:
Pid();
+ Pid(pid_t pid);
~Pid();
void operator =(pid_t pid);
operator pid_t();
- void kill();
+ void kill(bool quiet = false);
int wait(bool block);
void setSeparatePG(bool separatePG);
void setKillSignal(int signal);
@@ -252,11 +267,19 @@ public:
void killUser(uid_t uid);
+/* Fork a process that runs the given function, and return the child
+ pid to the caller. */
+pid_t startProcess(std::function<void()> fun, bool dieWithParent = true,
+ const string & errorPrefix = "error: ", bool runExitHandlers = false);
+
+
/* Run a program and return its stdout in a string (i.e., like the
shell backtick operator). */
string runProgram(Path program, bool searchPath = false,
const Strings & args = Strings());
+MakeError(ExecError, Error)
+
/* Close all file descriptors except stdin, stdout, stderr, and those
listed in the given set. Good practice in child processes. */
void closeMostFDs(const set<int> & exceptions);
@@ -264,9 +287,6 @@ void closeMostFDs(const set<int> & exceptions);
/* Set the close-on-exec flag for the given file descriptor. */
void closeOnExec(int fd);
-/* Call vfork() if available, otherwise fork(). */
-extern pid_t (*maybeVfork)();
-
/* User interruption. */
diff --git a/nix/nix-daemon/guix-daemon.cc b/nix/nix-daemon/guix-daemon.cc
index f096ed5a97..315744394f 100644
--- a/nix/nix-daemon/guix-daemon.cc
+++ b/nix/nix-daemon/guix-daemon.cc
@@ -154,8 +154,18 @@ parse_opt (int key, char *arg, struct argp_state *state)
settings.useChroot = false;
break;
case GUIX_OPT_CHROOT_DIR:
- settings.dirsInChroot.insert (arg);
- break;
+ {
+ std::string chroot_dirs;
+
+ chroot_dirs = settings.get ("build-extra-chroot-dirs",
+ (std::string) "");
+ if (chroot_dirs == "")
+ chroot_dirs = arg;
+ else
+ chroot_dirs = chroot_dirs + " " + arg;
+ settings.set("build-extra-chroot-dirs", chroot_dirs);
+ break;
+ }
case GUIX_OPT_DISABLE_LOG_COMPRESSION:
settings.compressLog = false;
break;
@@ -328,11 +338,12 @@ main (int argc, char *argv[])
if (settings.useChroot)
{
- foreach (PathSet::iterator, i, settings.dirsInChroot)
- {
- printMsg (lvlDebug,
- format ("directory `%1%' added to the chroot") % *i);
- }
+ std::string chroot_dirs;
+
+ chroot_dirs = settings.get ("build-extra-chroot-dirs",
+ (std::string) "");
+ printMsg (lvlDebug,
+ format ("extra chroot directories: '%1%'") % chroot_dirs);
}
printMsg (lvlDebug,
diff --git a/nix/nix-daemon/nix-daemon.cc b/nix/nix-daemon/nix-daemon.cc
index 8814fe3155..e42d602a3a 100644
--- a/nix/nix-daemon/nix-daemon.cc
+++ b/nix/nix-daemon/nix-daemon.cc
@@ -7,6 +7,8 @@
#include "affinity.hh"
#include "globals.hh"
+#include <algorithm>
+
#include <cstring>
#include <unistd.h>
#include <signal.h>
@@ -17,6 +19,8 @@
#include <sys/un.h>
#include <fcntl.h>
#include <errno.h>
+#include <pwd.h>
+#include <grp.h>
using namespace nix;
@@ -44,7 +48,6 @@ static FdSource from(STDIN_FILENO);
static FdSink to(STDOUT_FILENO);
bool canSendStderr;
-pid_t myPid;
@@ -54,11 +57,7 @@ pid_t myPid;
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()) {
+ if (canSendStderr) {
try {
writeInt(STDERR_NEXT, to);
writeString(buf, count, to);
@@ -284,15 +283,6 @@ static void performOp(bool trusted, unsigned int clientVersion,
{
switch (op) {
-#if 0
- case wopQuit: {
- /* Close the database. */
- store.reset((StoreAPI *) 0);
- writeInt(1, to);
- break;
- }
-#endif
-
case wopIsValidPath: {
/* 'readStorePath' could raise an error leading to the connection
being closed. To be able to recover from an invalid path error,
@@ -450,7 +440,7 @@ static void performOp(bool trusted, unsigned int clientVersion,
case wopImportPaths: {
startWork();
TunnelSource source(from);
- Paths paths = store->importPaths(true, source);
+ Paths paths = store->importPaths(!trusted, source);
stopWork();
writeStrings(paths, to);
break;
@@ -650,6 +640,13 @@ static void performOp(bool trusted, unsigned int clientVersion,
break;
}
+ case wopOptimiseStore:
+ startWork();
+ store->optimiseStore();
+ stopWork();
+ writeInt(1, to);
+ break;
+
default:
throw Error(format("invalid operation %1%") % op);
}
@@ -659,7 +656,6 @@ static void performOp(bool trusted, unsigned int clientVersion,
static void processConnection(bool trusted)
{
canSendStderr = false;
- myPid = getpid();
_writeToStderr = tunnelStderr;
#ifdef HAVE_HUP_NOTIFICATION
@@ -708,7 +704,7 @@ static void processConnection(bool trusted)
to.flush();
} catch (Error & e) {
- stopWork(false, e.msg());
+ stopWork(false, e.msg(), GET_PROTOCOL_MINOR(clientVersion) >= 8 ? 1 : 0);
to.flush();
return;
}
@@ -735,12 +731,10 @@ static void processConnection(bool trusted)
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;
+ if (!errorAllowed) throw;
} catch (std::bad_alloc & e) {
- if (canSendStderr)
- stopWork(false, "Nix daemon out of memory", GET_PROTOCOL_MINOR(clientVersion) >= 8 ? 1 : 0);
+ stopWork(false, "Nix daemon out of memory", GET_PROTOCOL_MINOR(clientVersion) >= 8 ? 1 : 0);
throw;
}
@@ -749,7 +743,7 @@ static void processConnection(bool trusted)
assert(!canSendStderr);
};
- printMsg(lvlError, format("%1% operations") % opCount);
+ printMsg(lvlDebug, format("%1% operations") % opCount);
}
@@ -771,6 +765,27 @@ static void setSigChldAction(bool autoReap)
}
+bool matchUser(const string & user, const string & group, const Strings & users)
+{
+ if (find(users.begin(), users.end(), "*") != users.end())
+ return true;
+
+ if (find(users.begin(), users.end(), user) != users.end())
+ return true;
+
+ for (auto & i : users)
+ if (string(i, 0, 1) == "@") {
+ if (group == string(i, 1)) return true;
+ struct group * gr = getgrnam(i.c_str() + 1);
+ if (!gr) continue;
+ for (char * * mem = gr->gr_mem; *mem; mem++)
+ if (user == string(*mem)) return true;
+ }
+
+ return false;
+}
+
+
#define SD_LISTEN_FDS_START 3
@@ -856,58 +871,61 @@ static void daemonLoop()
closeOnExec(remote);
- /* Get the identity of the caller, if possible. */
- uid_t clientUid = -1;
- pid_t clientPid = -1;
bool trusted = false;
+ pid_t clientPid = -1;
#if defined(SO_PEERCRED)
+ /* Get the identity of the caller, if possible. */
ucred cred;
socklen_t credLen = sizeof(cred);
- if (getsockopt(remote, SOL_SOCKET, SO_PEERCRED, &cred, &credLen) != -1) {
- clientPid = cred.pid;
- clientUid = cred.uid;
- if (clientUid == 0) trusted = true;
- }
-#endif
+ if (getsockopt(remote, SOL_SOCKET, SO_PEERCRED, &cred, &credLen) == -1)
+ throw SysError("getting peer credentials");
- printMsg(lvlInfo, format("accepted connection from pid %1%, uid %2%") % clientPid % clientUid);
+ clientPid = cred.pid;
- /* Fork a child to handle the connection. */
- pid_t child;
- child = fork();
+ struct passwd * pw = getpwuid(cred.uid);
+ string user = pw ? pw->pw_name : int2String(cred.uid);
- switch (child) {
+ struct group * gr = getgrgid(cred.gid);
+ string group = gr ? gr->gr_name : int2String(cred.gid);
- case -1:
- throw SysError("unable to fork");
+ Strings trustedUsers = settings.get("trusted-users", Strings({"root"}));
+ Strings allowedUsers = settings.get("allowed-users", Strings({"*"}));
- case 0:
- try { /* child */
+ if (matchUser(user, group, trustedUsers))
+ trusted = true;
- /* Background the daemon. */
- if (setsid() == -1)
- throw SysError(format("creating a new session"));
+ if (!trusted && !matchUser(user, group, allowedUsers))
+ throw Error(format("user `%1%' is not allowed to connect to the Nix daemon") % user);
- /* Restore normal handling of SIGCHLD. */
- setSigChldAction(false);
+ printMsg(lvlInfo, format((string) "accepted connection from pid %1%, user %2%"
+ + (trusted ? " (trusted)" : "")) % clientPid % user);
+#endif
+
+ /* Fork a child to handle the connection. */
+ startProcess([&]() {
+ fdSocket.close();
- /* 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]));
- }
+ /* Background the daemon. */
+ if (setsid() == -1)
+ throw SysError(format("creating a new session"));
- /* Handle the connection. */
- from.fd = remote;
- to.fd = remote;
- processConnection(trusted);
+ /* Restore normal handling of SIGCHLD. */
+ setSigChldAction(false);
- } catch (std::exception & e) {
- writeToStderr("unexpected Nix daemon error: " + string(e.what()) + "\n");
+ /* 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(trusted);
+
exit(0);
- }
+ }, false, "unexpected Nix daemon error: ", true);
} catch (Interrupted & e) {
throw;
diff --git a/tests/guix-archive.sh b/tests/guix-archive.sh
index d4259b8677..8eacf89338 100644
--- a/tests/guix-archive.sh
+++ b/tests/guix-archive.sh
@@ -1,5 +1,5 @@
# GNU Guix --- Functional package management for GNU
-# Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
+# Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
#
# This file is part of GNU Guix.
#
@@ -41,7 +41,6 @@ cmp "$archive" "$archive_alt"
# Check the exit value and stderr upon import.
guix archive --import < "$archive"
-guix archive --import < "$archive" 2>&1 | grep "import.*guile-bootstrap"
if guix archive something-that-does-not-exist
then false; else true; fi
generated by cgit v1.2.3 (git 2.25.4) at 2024-11-05 09:24:25 +0000