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Fix 'Read-only file system' when building a derivation

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This commit is contained in:
Eelco Dolstra 2018-11-15 12:59:54 +01:00
parent 32a0a223d5
commit a32ff2573b
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GPG key ID: 8170B4726D7198DE
3 changed files with 5 additions and 1 deletions
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2
src/libstore/build.cc
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@ -2193,6 +2193,7 @@ void DerivationGoal::startBuilder()
userNamespaceSync.create(); userNamespaceSync.create();
options.allowVfork = false; options.allowVfork = false;
options.restoreMountNamespace = false;
Pid helper = startProcess([&]() { Pid helper = startProcess([&]() {
@ -2259,6 +2260,7 @@ void DerivationGoal::startBuilder()
#endif #endif
{ {
options.allowVfork = !buildUser && !drv->isBuiltin(); options.allowVfork = !buildUser && !drv->isBuiltin();
options.restoreMountNamespace = false;
pid = startProcess([&]() { pid = startProcess([&]() {
runChild(); runChild();
}, options); }, options);

1
src/libutil/util.cc
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@ -936,6 +936,7 @@ pid_t startProcess(std::function<void()> fun, const ProcessOptions & options)
throw SysError("setting death signal"); throw SysError("setting death signal");
#endif #endif
restoreAffinity(); restoreAffinity();
if (options.restoreMountNamespace)
restoreMountNamespace(); restoreMountNamespace();
fun(); fun();
} catch (std::exception & e) { } catch (std::exception & e) {

1
src/libutil/util.hh
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@ -250,6 +250,7 @@ struct ProcessOptions
bool dieWithParent = true; bool dieWithParent = true;
bool runExitHandlers = false; bool runExitHandlers = false;
bool allowVfork = true; bool allowVfork = true;
bool restoreMountNamespace = true;
}; };
pid_t startProcess(std::function<void()> fun, const ProcessOptions & options = ProcessOptions()); pid_t startProcess(std::function<void()> fun, const ProcessOptions & options = ProcessOptions());