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Merge pull request #5339 from edolstra/fix-daemon-logging

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Don't reset the logger in a vfork
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Eelco Dolstra 2021-10-06 14:38:46 +02:00 committed by GitHub
parent 987ca62cd5 c6718a9d95
commit bedd12ec14
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 5 additions and 13 deletions
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8
src/libstore/build/local-derivation-goal.cc
View file

@ -755,7 +755,6 @@ void LocalDerivationGoal::startBuilder()
result.startTime = time(0); result.startTime = time(0);
/* Fork a child to build the package. */ /* Fork a child to build the package. */
ProcessOptions options;
#if __linux__ #if __linux__
if (useChroot) { if (useChroot) {
@ -798,8 +797,6 @@ void LocalDerivationGoal::startBuilder()
userNamespaceSync.create(); userNamespaceSync.create();
options.allowVfork = false;
Path maxUserNamespaces = "/proc/sys/user/max_user_namespaces"; Path maxUserNamespaces = "/proc/sys/user/max_user_namespaces";
static bool userNamespacesEnabled = static bool userNamespacesEnabled =
pathExists(maxUserNamespaces) pathExists(maxUserNamespaces)
@ -857,7 +854,7 @@ void LocalDerivationGoal::startBuilder()
writeFull(builderOut.writeSide.get(), writeFull(builderOut.writeSide.get(),
fmt("%d %d\n", usingUserNamespace, child)); fmt("%d %d\n", usingUserNamespace, child));
_exit(0); _exit(0);
}, options); });
int res = helper.wait(); int res = helper.wait();
if (res != 0 && settings.sandboxFallback) { if (res != 0 && settings.sandboxFallback) {
@ -921,10 +918,9 @@ void LocalDerivationGoal::startBuilder()
#endif #endif
{ {
fallback: fallback:
options.allowVfork = !buildUser && !drv->isBuiltin();
pid = startProcess([&]() { pid = startProcess([&]() {
runChild(); runChild();
}, options); });
} }
/* parent */ /* parent */

8
src/libutil/util.cc
View file

@ -939,9 +939,6 @@ void killUser(uid_t uid)
users to which the current process can send signals. So we users to which the current process can send signals. So we
fork a process, switch to uid, and send a mass kill. */ fork a process, switch to uid, and send a mass kill. */
ProcessOptions options;
options.allowVfork = false;
Pid pid = startProcess([&]() { Pid pid = startProcess([&]() {
if (setuid(uid) == -1) if (setuid(uid) == -1)
@ -964,7 +961,7 @@ void killUser(uid_t uid)
} }
_exit(0); _exit(0);
}, options); });
int status = pid.wait(); int status = pid.wait();
if (status != 0) if (status != 0)
@ -1085,8 +1082,7 @@ void runProgram2(const RunOptions & options)
// vfork implies that the environment of the main process and the fork will // vfork implies that the environment of the main process and the fork will
// be shared (technically this is undefined, but in practice that's the // be shared (technically this is undefined, but in practice that's the
// case), so we can't use it if we alter the environment // case), so we can't use it if we alter the environment
if (options.environment) processOptions.allowVfork = !options.environment;
processOptions.allowVfork = false;
/* Fork. */ /* Fork. */
Pid pid = startProcess([&]() { Pid pid = startProcess([&]() {

2
src/libutil/util.hh
View file

@ -262,7 +262,7 @@ struct ProcessOptions
string errorPrefix = ""; string errorPrefix = "";
bool dieWithParent = true; bool dieWithParent = true;
bool runExitHandlers = false; bool runExitHandlers = false;
bool allowVfork = true; bool allowVfork = false;
}; };
pid_t startProcess(std::function<void()> fun, const ProcessOptions & options = ProcessOptions()); pid_t startProcess(std::function<void()> fun, const ProcessOptions & options = ProcessOptions());