mirror of
https://github.com/privatevoid-net/nix-super.git
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50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
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#if __linux__
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#include "cgroup.hh"
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#include "util.hh"
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#include <chrono>
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#include <dirent.h>
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namespace nix {
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void destroyCgroup(const Path & cgroup)
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{
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for (auto & entry : readDirectory(cgroup)) {
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if (entry.type != DT_DIR) continue;
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destroyCgroup(cgroup + "/" + entry.name);
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}
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int round = 1;
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while (true) {
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auto pids = tokenizeString<std::vector<std::string>>(readFile(cgroup + "/cgroup.procs"));
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if (pids.empty()) break;
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if (round > 20)
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throw Error("cannot kill cgroup '%s'", cgroup);
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for (auto & pid_s : pids) {
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pid_t pid;
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if (!string2Int(pid_s, pid)) throw Error("invalid pid '%s'", pid);
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// FIXME: pid wraparound
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if (kill(pid, SIGKILL) == -1 && errno != ESRCH)
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throw SysError("killing member %d of cgroup '%s'", pid, cgroup);
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}
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auto sleep = std::chrono::milliseconds((int) std::pow(2.0, std::min(round, 10)));
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printError("waiting for %d ms for cgroup '%s' to become empty", sleep.count(), cgroup);
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std::this_thread::sleep_for(sleep);
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round++;
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}
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if (rmdir(cgroup.c_str()) == -1)
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throw SysError("deleting cgroup '%s'", cgroup);
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}
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}
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#endif
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