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https://github.com/privatevoid-net/nix-super.git
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765bdfe542
mode. Presumably nix-worker would be setuid to the Nix store user. The worker performs all operations on the Nix store and database, so the caller can be completely unprivileged. This is already much more secure than the old setuid scheme, since the worker doesn't need to do Nix expression evaluation and so on. Most importantly, this means that it doesn't need to access any user files, with all resulting security risks; it only performs pure store operations. Once this works, it is easy to move to a daemon model that forks off a worker for connections established through a Unix domain socket. That would be even more secure.
53 lines
986 B
C++
53 lines
986 B
C++
#include "shared.hh"
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#include "local-store.hh"
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#include "util.hh"
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#include "serialise.hh"
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using namespace nix;
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void processConnection(Source & from, Sink & to)
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{
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store = boost::shared_ptr<StoreAPI>(new LocalStore(true));
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unsigned int magic = readInt(from);
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if (magic != 0x6e697864) throw Error("protocol mismatch");
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writeInt(0x6478696e, to);
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debug("greeting exchanged");
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}
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void run(Strings args)
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{
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bool slave = false;
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bool daemon = false;
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for (Strings::iterator i = args.begin(); i != args.end(); ) {
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string arg = *i++;
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if (arg == "--slave") slave = true;
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}
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if (slave) {
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FdSource source(STDIN_FILENO);
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FdSink sink(STDOUT_FILENO);
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processConnection(source, sink);
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}
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else if (daemon)
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throw Error("daemon mode not implemented");
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else
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throw Error("must be run in either --slave or --daemon mode");
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}
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void printHelp()
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{
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}
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string programId = "nix-store";
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