aboutsummaryrefslogtreecommitdiff
path: root/nix
diff options
context:
space:
mode:
Diffstat (limited to 'nix')
-rw-r--r--nix/libstore/build.cc62
-rw-r--r--nix/libstore/derivations.cc9
-rw-r--r--nix/libstore/derivations.hh1
-rw-r--r--nix/libstore/gc.cc31
-rw-r--r--nix/libstore/globals.cc2
-rw-r--r--nix/libstore/local-store.cc18
-rw-r--r--nix/libstore/misc.cc4
-rw-r--r--nix/libstore/misc.hh2
-rw-r--r--nix/libutil/util.cc11
-rw-r--r--nix/libutil/util.hh2
-rw-r--r--nix/nix-daemon/nix-daemon.cc5
11 files changed, 93 insertions, 54 deletions
diff --git a/nix/libstore/build.cc b/nix/libstore/build.cc
index 85a818ba94..a9eedcef16 100644
--- a/nix/libstore/build.cc
+++ b/nix/libstore/build.cc
@@ -447,6 +447,7 @@ private:
string user;
uid_t uid;
gid_t gid;
+ std::vector<gid_t> supplementaryGIDs;
public:
UserLock();
@@ -460,6 +461,7 @@ public:
string getUser() { return user; }
uid_t getUID() { return uid; }
uid_t getGID() { return gid; }
+ std::vector<gid_t> getSupplementaryGIDs() { return supplementaryGIDs; }
bool enabled() { return uid != 0; }
@@ -539,6 +541,17 @@ void UserLock::acquire()
throw Error(format("the Nix user should not be a member of `%1%'")
% settings.buildUsersGroup);
+ /* Get the list of supplementary groups of this build user. This
+ is usually either empty or contains a group such as "kvm". */
+ supplementaryGIDs.resize(10);
+ int ngroups = supplementaryGIDs.size();
+ int err = getgrouplist(pw->pw_name, pw->pw_gid,
+ supplementaryGIDs.data(), &ngroups);
+ if (err == -1)
+ throw Error(format("failed to get list of supplementary groups for ‘%1%’") % pw->pw_name);
+
+ supplementaryGIDs.resize(ngroups);
+
return;
}
}
@@ -1000,7 +1013,7 @@ void DerivationGoal::haveDerivation()
/* We are first going to try to create the invalid output paths
through substitutes. If that doesn't work, we'll build
them. */
- if (settings.useSubstitutes && !willBuildLocally(drv))
+ if (settings.useSubstitutes && substitutesAllowed(drv))
foreach (PathSet::iterator, i, invalidOutputs)
addWaitee(worker.makeSubstitutionGoal(*i, buildMode == bmRepair));
@@ -1188,35 +1201,32 @@ void DerivationGoal::inputsRealised()
}
-PathSet outputPaths(const DerivationOutputs & outputs)
+static bool canBuildLocally(const string & platform)
{
- PathSet paths;
- foreach (DerivationOutputs::const_iterator, i, outputs)
- paths.insert(i->second.path);
- return paths;
+ return platform == settings.thisSystem
+#if __linux__
+ || (platform == "i686-linux" && settings.thisSystem == "x86_64-linux")
+#endif
+ ;
}
-static string get(const StringPairs & map, const string & key)
+static string get(const StringPairs & map, const string & key, const string & def = "")
{
StringPairs::const_iterator i = map.find(key);
- return i == map.end() ? (string) "" : i->second;
+ return i == map.end() ? def : i->second;
}
-static bool canBuildLocally(const string & platform)
+bool willBuildLocally(const Derivation & drv)
{
- return platform == settings.thisSystem
-#if __linux__
- || (platform == "i686-linux" && settings.thisSystem == "x86_64-linux")
-#endif
- ;
+ return get(drv.env, "preferLocalBuild") == "1" && canBuildLocally(drv.platform);
}
-bool willBuildLocally(const Derivation & drv)
+bool substitutesAllowed(const Derivation & drv)
{
- return get(drv.env, "preferLocalBuild") == "1" && canBuildLocally(drv.platform);
+ return get(drv.env, "allowSubstitutes", "1") == "1";
}
@@ -1242,7 +1252,7 @@ void DerivationGoal::tryToBuild()
can't acquire the lock, then continue; hopefully some other
goal can start a build, and if not, the main loop will sleep a
few seconds and then retry this goal. */
- if (!outputLocks.lockPaths(outputPaths(drv.outputs), "", false)) {
+ if (!outputLocks.lockPaths(outputPaths(drv), "", false)) {
worker.waitForAWhile(shared_from_this());
return;
}
@@ -1263,7 +1273,7 @@ void DerivationGoal::tryToBuild()
return;
}
- missingPaths = outputPaths(drv.outputs);
+ missingPaths = outputPaths(drv);
if (buildMode != bmCheck)
foreach (PathSet::iterator, i, validPaths) missingPaths.erase(*i);
@@ -2168,7 +2178,6 @@ void DerivationGoal::runChild()
Strings envStrs;
foreach (Environment::const_iterator, i, env)
envStrs.push_back(rewriteHashes(i->first + "=" + i->second, rewritesToTmp));
- auto envArr = stringsToCharPtrs(envStrs);
/* If we are running in `build-users' mode, then switch to the
user we allocated above. Make sure that we drop all root
@@ -2177,10 +2186,11 @@ void DerivationGoal::runChild()
setuid() when run as root sets the real, effective and
saved UIDs. */
if (buildUser.enabled()) {
- printMsg(lvlChatty, format("switching to user `%1%'") % buildUser.getUser());
-
- if (setgroups(0, 0) == -1)
- throw SysError("cannot clear the set of supplementary groups");
+ /* Preserve supplementary groups of the build user, to allow
+ admins to specify groups such as "kvm". */
+ if (setgroups(buildUser.getSupplementaryGIDs().size(),
+ buildUser.getSupplementaryGIDs().data()) == -1)
+ throw SysError("cannot set supplementary groups of build user");
if (setgid(buildUser.getGID()) == -1 ||
getgid() != buildUser.getGID() ||
@@ -2199,7 +2209,6 @@ void DerivationGoal::runChild()
args.push_back(builderBasename);
foreach (Strings::iterator, i, drv.args)
args.push_back(rewriteHashes(*i, rewritesToTmp));
- auto argArr = stringsToCharPtrs(args);
restoreSIGPIPE();
@@ -2207,7 +2216,7 @@ void DerivationGoal::runChild()
writeFull(STDERR_FILENO, "\n");
/* Execute the program. This should not return. */
- execve(drv.builder.c_str(), (char * *) &argArr[0], (char * *) &envArr[0]);
+ execve(drv.builder.c_str(), stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
throw SysError(format("executing `%1%'") % drv.builder);
@@ -2837,7 +2846,6 @@ void SubstitutionGoal::tryToRun()
args.push_back("--substitute");
args.push_back(storePath);
args.push_back(destPath);
- auto argArr = stringsToCharPtrs(args);
/* Fork the substitute program. */
pid = startProcess([&]() {
@@ -2847,7 +2855,7 @@ void SubstitutionGoal::tryToRun()
if (dup2(outPipe.writeSide, STDOUT_FILENO) == -1)
throw SysError("cannot dup output pipe into stdout");
- execv(sub.c_str(), (char * *) &argArr[0]);
+ execv(sub.c_str(), stringsToCharPtrs(args).data());
throw SysError(format("executing `%1%'") % sub);
});
diff --git a/nix/libstore/derivations.cc b/nix/libstore/derivations.cc
index b452aa2caf..d316f6c7bf 100644
--- a/nix/libstore/derivations.cc
+++ b/nix/libstore/derivations.cc
@@ -285,4 +285,13 @@ bool wantOutput(const string & output, const std::set<string> & wanted)
}
+PathSet outputPaths(const Derivation & drv)
+{
+ PathSet paths;
+ for (auto & i : drv.outputs)
+ paths.insert(i.second.path);
+ return paths;
+}
+
+
}
diff --git a/nix/libstore/derivations.hh b/nix/libstore/derivations.hh
index 04b64dfc88..8d5e4d05d4 100644
--- a/nix/libstore/derivations.hh
+++ b/nix/libstore/derivations.hh
@@ -89,5 +89,6 @@ Path makeDrvPathWithOutputs(const Path & drvPath, const std::set<string> & outpu
bool wantOutput(const string & output, const std::set<string> & wanted);
+PathSet outputPaths(const Derivation & drv);
}
diff --git a/nix/libstore/gc.cc b/nix/libstore/gc.cc
index 34768324c2..72eff52426 100644
--- a/nix/libstore/gc.cc
+++ b/nix/libstore/gc.cc
@@ -376,6 +376,7 @@ struct LocalStore::GCState
bool gcKeepOutputs;
bool gcKeepDerivations;
unsigned long long bytesInvalidated;
+ bool moveToTrash = true;
Path trashDir;
bool shouldDelete;
GCState(GCResults & results_) : results(results_), bytesInvalidated(0) { }
@@ -428,16 +429,23 @@ void LocalStore::deletePathRecursive(GCState & state, const Path & path)
not holding the global GC lock) we can delete the path without
being afraid that the path has become alive again. Otherwise
delete it right away. */
- if (S_ISDIR(st.st_mode)) {
+ if (state.moveToTrash && S_ISDIR(st.st_mode)) {
// Estimate the amount freed using the narSize field. FIXME:
// if the path was not valid, need to determine the actual
// size.
- state.bytesInvalidated += size;
- if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
- throw SysError(format("making `%1%' writable") % path);
- Path tmp = state.trashDir + "/" + baseNameOf(path);
- if (rename(path.c_str(), tmp.c_str()))
- throw SysError(format("unable to rename `%1%' to `%2%'") % path % tmp);
+ try {
+ if (chmod(path.c_str(), st.st_mode | S_IWUSR) == -1)
+ throw SysError(format("making `%1%' writable") % path);
+ Path tmp = state.trashDir + "/" + baseNameOf(path);
+ if (rename(path.c_str(), tmp.c_str()))
+ throw SysError(format("unable to rename `%1%' to `%2%'") % path % tmp);
+ state.bytesInvalidated += size;
+ } catch (SysError & e) {
+ if (e.errNo == ENOSPC) {
+ printMsg(lvlInfo, format("note: can't create move `%1%': %2%") % path % e.msg());
+ deleteGarbage(state, path);
+ }
+ }
} else
deleteGarbage(state, path);
@@ -636,7 +644,14 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
if (state.shouldDelete) {
if (pathExists(state.trashDir)) deleteGarbage(state, state.trashDir);
- createDirs(state.trashDir);
+ try {
+ createDirs(state.trashDir);
+ } catch (SysError & e) {
+ if (e.errNo == ENOSPC) {
+ printMsg(lvlInfo, format("note: can't create trash directory: %1%") % e.msg());
+ state.moveToTrash = false;
+ }
+ }
}
/* Now either delete all garbage paths, or just the specified
diff --git a/nix/libstore/globals.cc b/nix/libstore/globals.cc
index bb08a7d0b0..07f23d469c 100644
--- a/nix/libstore/globals.cc
+++ b/nix/libstore/globals.cc
@@ -36,7 +36,7 @@ Settings::Settings()
buildTimeout = 0;
useBuildHook = true;
printBuildTrace = false;
- reservedSize = 1024 * 1024;
+ reservedSize = 8 * 1024 * 1024;
fsyncMetadata = true;
useSQLiteWAL = true;
syncBeforeRegistering = false;
diff --git a/nix/libstore/local-store.cc b/nix/libstore/local-store.cc
index 630cb80c41..b2c78477b6 100644
--- a/nix/libstore/local-store.cc
+++ b/nix/libstore/local-store.cc
@@ -288,7 +288,17 @@ LocalStore::LocalStore(bool reserveSpace)
struct stat st;
if (stat(reservedPath.c_str(), &st) == -1 ||
st.st_size != settings.reservedSize)
- writeFile(reservedPath, string(settings.reservedSize, 'X'));
+ {
+ AutoCloseFD fd = open(reservedPath.c_str(), O_WRONLY | O_CREAT, 0600);
+ int res = -1;
+#if HAVE_POSIX_FALLOCATE
+ res = posix_fallocate(fd, 0, settings.reservedSize);
+#endif
+ if (res == -1) {
+ writeFull(fd, string(settings.reservedSize, 'X'));
+ ftruncate(fd, settings.reservedSize);
+ }
+ }
}
else
deletePath(reservedPath);
@@ -1166,10 +1176,8 @@ string LocalStore::getLineFromSubstituter(RunningSubstituter & run)
if (n == 0) throw EndOfFile(format("substituter `%1%' died unexpectedly") % run.program);
err.append(buf, n);
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);
+ while ((p = err.find('\n')) != string::npos) {
+ printMsg(lvlError, run.program + ": " + string(err, 0, p));
err = string(err, p + 1);
}
}
diff --git a/nix/libstore/misc.cc b/nix/libstore/misc.cc
index 6ecf8787cf..22363af126 100644
--- a/nix/libstore/misc.cc
+++ b/nix/libstore/misc.cc
@@ -120,7 +120,7 @@ void queryMissing(StoreAPI & store, const PathSet & targets,
if (invalid.empty()) continue;
todoDrv.insert(*i);
- if (settings.useSubstitutes && !willBuildLocally(drv))
+ if (settings.useSubstitutes && substitutesAllowed(drv))
query.insert(invalid.begin(), invalid.end());
}
@@ -144,7 +144,7 @@ void queryMissing(StoreAPI & store, const PathSet & targets,
PathSet outputs;
bool mustBuild = false;
- if (settings.useSubstitutes && !willBuildLocally(drv)) {
+ if (settings.useSubstitutes && substitutesAllowed(drv)) {
foreach (DerivationOutputs::iterator, j, drv.outputs) {
if (!wantOutput(j->first, i2.second)) continue;
if (!store.isValidPath(j->second.path)) {
diff --git a/nix/libstore/misc.hh b/nix/libstore/misc.hh
index 144cb7f457..d3e31d51f7 100644
--- a/nix/libstore/misc.hh
+++ b/nix/libstore/misc.hh
@@ -34,5 +34,7 @@ void queryMissing(StoreAPI & store, const PathSet & targets,
bool willBuildLocally(const Derivation & drv);
+bool substitutesAllowed(const Derivation & drv);
+
}
diff --git a/nix/libutil/util.cc b/nix/libutil/util.cc
index dab4235b04..14026ab829 100644
--- a/nix/libutil/util.cc
+++ b/nix/libutil/util.cc
@@ -897,10 +897,10 @@ pid_t startProcess(std::function<void()> fun,
}
-std::vector<const char *> stringsToCharPtrs(const Strings & ss)
+std::vector<char *> stringsToCharPtrs(const Strings & ss)
{
- std::vector<const char *> res;
- for (auto & s : ss) res.push_back(s.c_str());
+ std::vector<char *> res;
+ for (auto & s : ss) res.push_back((char *) s.c_str());
res.push_back(0);
return res;
}
@@ -921,12 +921,11 @@ string runProgram(Path program, bool searchPath, const Strings & args)
Strings args_(args);
args_.push_front(program);
- auto cargs = stringsToCharPtrs(args_);
if (searchPath)
- execvp(program.c_str(), (char * *) &cargs[0]);
+ execvp(program.c_str(), stringsToCharPtrs(args_).data());
else
- execv(program.c_str(), (char * *) &cargs[0]);
+ execv(program.c_str(), stringsToCharPtrs(args_).data());
throw SysError(format("executing `%1%'") % program);
});
diff --git a/nix/libutil/util.hh b/nix/libutil/util.hh
index 6a84ed8851..24e16ba36a 100644
--- a/nix/libutil/util.hh
+++ b/nix/libutil/util.hh
@@ -284,7 +284,7 @@ MakeError(ExecError, Error)
/* Convert a list of strings to a null-terminated vector of char
*'s. The result must not be accessed beyond the lifetime of the
list of strings. */
-std::vector<const char *> stringsToCharPtrs(const Strings & ss);
+std::vector<char *> stringsToCharPtrs(const Strings & ss);
/* Close all file descriptors except stdin, stdout, stderr, and those
listed in the given set. Good practice in child processes. */
diff --git a/nix/nix-daemon/nix-daemon.cc b/nix/nix-daemon/nix-daemon.cc
index 10159db62e..2b89190dbe 100644
--- a/nix/nix-daemon/nix-daemon.cc
+++ b/nix/nix-daemon/nix-daemon.cc
@@ -440,10 +440,7 @@ static void performOp(bool trusted, unsigned int clientVersion,
case wopImportPaths: {
startWork();
TunnelSource source(from);
-
- /* Unlike Nix, always require a signature, even for "trusted"
- users. */
- Paths paths = store->importPaths(true, source);
+ Paths paths = store->importPaths(!trusted, source);
stopWork();
writeStrings(paths, to);
break;
generated by cgit