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/posix/child_handle.hpp>
  10 #include <system_error>
  11 #include <unistd.h>
  12
  13 namespace boost { namespace process { namespace detail { namespace posix {
  14
  15
  16
  17 struct group_handle
  18 {
  19     pid_t grp = -1;
  20
  21     typedef pid_t handle_t;
  22     handle_t handle() const { return grp; }
  23
  24     explicit group_handle(handle_t h) :
  25         grp(h)
  26     {
  27     }
  28
  29
  30      group_handle() = default;
  31
  32     ~group_handle() = default;
  33     group_handle(const group_handle & c) = delete;
  34     group_handle(group_handle && c) : grp(c.grp)
  35     {
  36         c.grp = -1;
  37     }
  38     group_handle &operator=(const group_handle & c) = delete;
  39     group_handle &operator=(group_handle && c)
  40     {
  41
  42         grp = c.grp;
  43         c.grp = -1;
  44         return *this;
  45     }
  46
  47     void add(handle_t proc)
  48     {
  49         if (::setpgid(proc, grp))
  50             throw_last_error();
  51     }
  52     void add(handle_t proc, std::error_code & ec) noexcept
  53     {
  54         if (::setpgid(proc, grp))
  55             ec = get_last_error();
  56     }
  57
  58     bool has(handle_t proc)
  59     {
  60         return ::getpgid(proc) == grp;
  61     }
  62     bool has(handle_t proc, std::error_code & ec) noexcept
  63     {
  64         return ::getpgid(proc) == grp;
  65
  66     }
  67
  68     bool valid() const
  69     {
  70         return grp != -1;
  71     }
  72
  73 };
  74
  75 inline void terminate(group_handle &p)
  76 {
  77     if (::killpg(p.grp, SIGKILL) == -1)
  78         boost::process::detail::throw_last_error("killpg(2) failed");
  79     p.grp = -1;
  80 }
  81
  82 inline  void terminate(group_handle &p, std::error_code &ec) noexcept
  83 {
  84     if (::killpg(p.grp, SIGKILL) == -1)
  85         ec = boost::process::detail::get_last_error();
  86     else
  87         ec.clear();
  88
  89     p.grp = -1;
  90 }
  91
  92
  93 inline bool in_group()
  94 {
  95     return true;
  96 }
  97
  98
  99
 100 }}}}
 101
 102
 103 #endif /* BOOST_PROCESS_DETAIL_WINDOWS_GROUP_HPP_ */