ceph/src/boost/boost/process/detail/posix/group_handle.hpp

   1 // Copyright (c) 2016 Klemens D. Morgenstern
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_PROCESS_DETAIL_POSIX_GROUP_HPP_
   7 #define BOOST_PROCESS_DETAIL_POSIX_GROUP_HPP_
   8
   9 #include <boost/process/detail/config.hpp>
  10 #include <boost/process/detail/posix/child_handle.hpp>
  11 #include <system_error>
  12 #include <unistd.h>
  13
  14 namespace boost { namespace process { namespace detail { namespace posix {
  15
  16 struct group_handle
  17 {
  18     pid_t grp = -1;
  19
  20     typedef pid_t handle_t;
  21     handle_t handle() const { return grp; }
  22
  23     explicit group_handle(handle_t h) :
  24         grp(h)
  25     {
  26     }
  27
  28      group_handle() = default;
  29
  30     ~group_handle() = default;
  31     group_handle(const group_handle & c) = delete;
  32     group_handle(group_handle && c) : grp(c.grp)
  33     {
  34         c.grp = -1;
  35     }
  36     group_handle &operator=(const group_handle & c) = delete;
  37     group_handle &operator=(group_handle && c)
  38     {
  39         grp = c.grp;
  40         c.grp = -1;
  41         return *this;
  42     }
  43
  44     void add(handle_t proc)
  45     {
  46         if (::setpgid(proc, grp))
  47             throw_last_error();
  48     }
  49     void add(handle_t proc, std::error_code & ec) noexcept
  50     {
  51         if (::setpgid(proc, grp))
  52             ec = get_last_error();
  53     }
  54
  55     bool has(handle_t proc)
  56     {
  57         return ::getpgid(proc) == grp;
  58     }
  59     bool has(handle_t proc, std::error_code & ec) noexcept
  60     {
  61         return ::getpgid(proc) == grp;
  62     }
  63
  64     bool valid() const
  65     {
  66         return grp != -1;
  67     }
  68 };
  69
  70 inline  void terminate(group_handle &p, std::error_code &ec) noexcept
  71 {
  72     if (::killpg(p.grp, SIGKILL) == -1)
  73         ec = boost::process::detail::get_last_error();
  74     else
  75         ec.clear();
  76
  77     p.grp = -1;
  78 }
  79
  80 inline void terminate(group_handle &p)
  81 {
  82     std::error_code ec;
  83     terminate(p, ec);
  84     boost::process::detail::throw_error(ec, "killpg(2) failed in terminate");
  85 }
  86
  87 inline bool in_group()
  88 {
  89     return true;
  90 }
  91
  92 }}}}
  93
  94 #endif /* BOOST_PROCESS_DETAIL_WINDOWS_GROUP_HPP_ */