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nix-store --serve: Monitor for client disconnects
This is necessary because build-remote.pl now builds via ‘nix-store --serve’. So if a build hangs without writing to stdout/stderr, and the client disconnects, then we need to detect that.
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@ -8,6 +8,7 @@
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#include "util.hh"
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#include "serve-protocol.hh"
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#include "worker-protocol.hh"
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#include "monitor-fd.hh"
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#include <iostream>
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#include <algorithm>
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@ -879,6 +880,8 @@ static void opServe(Strings opFlags, Strings opArgs)
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FdSource in(STDIN_FILENO);
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FdSink out(STDOUT_FILENO);
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MonitorFdHup monitor(in.fd);
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/* Exchange the greeting. */
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unsigned int magic = readInt(in);
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if (magic != SERVE_MAGIC_1) throw Error("protocol mismatch");
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