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Fix "Bad address" executing build hook

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This was observed in the deb_debian7x86_64 build:
http://hydra.nixos.org/build/29973215

Calling c_str() on a temporary should be fine because the temporary
shouldn't be destroyed until after the execl() call, but who knows...
This commit is contained in:
Eelco Dolstra 2016-01-07 15:10:14 +01:00
parent 9aac1861f7
commit 458711e4ee
2 changed files with 10 additions and 6 deletions
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14
src/libstore/build.cc
View file

@ -621,11 +621,15 @@ HookInstance::HookInstance()
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);
Strings args = {
baseNameOf(buildHook),
settings.thisSystem,
(format("%1%") % settings.maxSilentTime).str(),
(format("%1%") % settings.printBuildTrace).str(),
(format("%1%") % settings.buildTimeout).str()
};
execv(buildHook.c_str(), stringsToCharPtrs(args).data());
throw SysError(format("executing ‘%1%’") % buildHook);
});