external/bsd/atf/dist/atf-c++/detail/process.hpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2008 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 #if !defined(_ATF_CXX_PROCESS_HPP_)
  31 #define _ATF_CXX_PROCESS_HPP_
  32
  33 extern "C" {
  34 #include <sys/types.h>
  35
  36 #include "../../atf-c/error.h"
  37
  38 #include "../../atf-c/detail/process.h"
  39 }
  40
  41 #include <string>
  42 #include <vector>
  43
  44 #include "auto_array.hpp"
  45 #include "exceptions.hpp"
  46 #include "fs.hpp"
  47
  48 namespace atf {
  49 namespace process {
  50
  51 class child;
  52 class status;
  53
  54 // ------------------------------------------------------------------------
  55 // The "argv_array" type.
  56 // ------------------------------------------------------------------------
  57
  58 class argv_array {
  59     typedef std::vector< std::string > args_vector;
  60     args_vector m_args;
  61
  62     // TODO: This is immutable, so we should be able to use
  63     // std::tr1::shared_array instead when it becomes widely available.
  64     // The reason would be to remove all copy constructors and assignment
  65     // operators from this class.
  66     auto_array< const char* > m_exec_argv;
  67     void ctor_init_exec_argv(void);
  68
  69 public:
  70     typedef args_vector::const_iterator const_iterator;
  71     typedef args_vector::size_type size_type;
  72
  73     argv_array(void);
  74     argv_array(const char*, ...);
  75     explicit argv_array(const char* const*);
  76     template< class C > explicit argv_array(const C&);
  77     argv_array(const argv_array&);
  78
  79     const char* const* exec_argv(void) const;
  80     size_type size(void) const;
  81     const char* operator[](int) const;
  82
  83     const_iterator begin(void) const;
  84     const_iterator end(void) const;
  85
  86     argv_array& operator=(const argv_array&);
  87 };
  88
  89 template< class C >
  90 argv_array::argv_array(const C& c)
  91 {
  92     for (typename C::const_iterator iter = c.begin(); iter != c.end();
  93          iter++)
  94         m_args.push_back(*iter);
  95     ctor_init_exec_argv();
  96 }
  97
  98 // ------------------------------------------------------------------------
  99 // The "stream" types.
 100 // ------------------------------------------------------------------------
 101
 102 class basic_stream {
 103 protected:
 104     atf_process_stream_t m_sb;
 105     bool m_inited;
 106
 107     const atf_process_stream_t* get_sb(void) const;
 108
 109 public:
 110     basic_stream(void);
 111     ~basic_stream(void);
 112 };
 113
 114 class stream_capture : basic_stream {
 115     // Allow access to the getters.
 116     template< class OutStream, class ErrStream > friend
 117     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 118     template< class OutStream, class ErrStream > friend
 119     status exec(const atf::fs::path&, const argv_array&,
 120                 const OutStream&, const ErrStream&, void (*)(void));
 121
 122 public:
 123     stream_capture(void);
 124 };
 125
 126 class stream_connect : basic_stream {
 127     // Allow access to the getters.
 128     template< class OutStream, class ErrStream > friend
 129     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 130     template< class OutStream, class ErrStream > friend
 131     status exec(const atf::fs::path&, const argv_array&,
 132                 const OutStream&, const ErrStream&, void (*)(void));
 133
 134 public:
 135     stream_connect(const int, const int);
 136 };
 137
 138 class stream_inherit : basic_stream {
 139     // Allow access to the getters.
 140     template< class OutStream, class ErrStream > friend
 141     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 142     template< class OutStream, class ErrStream > friend
 143     status exec(const atf::fs::path&, const argv_array&,
 144                 const OutStream&, const ErrStream&, void (*)(void));
 145
 146 public:
 147     stream_inherit(void);
 148 };
 149
 150 class stream_redirect_fd : basic_stream {
 151     // Allow access to the getters.
 152     template< class OutStream, class ErrStream > friend
 153     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 154     template< class OutStream, class ErrStream > friend
 155     status exec(const atf::fs::path&, const argv_array&,
 156                 const OutStream&, const ErrStream&, void (*)(void));
 157
 158 public:
 159     stream_redirect_fd(const int);
 160 };
 161
 162 class stream_redirect_path : basic_stream {
 163     // Allow access to the getters.
 164     template< class OutStream, class ErrStream > friend
 165     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 166     template< class OutStream, class ErrStream > friend
 167     status exec(const atf::fs::path&, const argv_array&,
 168                 const OutStream&, const ErrStream&, void (*)(void));
 169
 170 public:
 171     stream_redirect_path(const fs::path&);
 172 };
 173
 174 // ------------------------------------------------------------------------
 175 // The "status" type.
 176 // ------------------------------------------------------------------------
 177
 178 class status {
 179     atf_process_status_t m_status;
 180
 181     friend class child;
 182     template< class OutStream, class ErrStream > friend
 183     status exec(const atf::fs::path&, const argv_array&,
 184                 const OutStream&, const ErrStream&, void (*)(void));
 185
 186     status(atf_process_status_t&);
 187
 188 public:
 189     ~status(void);
 190
 191     bool exited(void) const;
 192     int exitstatus(void) const;
 193
 194     bool signaled(void) const;
 195     int termsig(void) const;
 196     bool coredump(void) const;
 197 };
 198
 199 // ------------------------------------------------------------------------
 200 // The "child" type.
 201 // ------------------------------------------------------------------------
 202
 203 class child {
 204     atf_process_child_t m_child;
 205     bool m_waited;
 206
 207     template< class OutStream, class ErrStream > friend
 208     child fork(void (*)(void*), const OutStream&, const ErrStream&, void*);
 209
 210     child(atf_process_child_t& c);
 211
 212 public:
 213     ~child(void);
 214
 215     status wait(void);
 216
 217     pid_t pid(void) const;
 218     int stdout_fd(void);
 219     int stderr_fd(void);
 220 };
 221
 222 // ------------------------------------------------------------------------
 223 // Free functions.
 224 // ------------------------------------------------------------------------
 225
 226 namespace detail {
 227 void flush_streams(void);
 228 } // namespace detail
 229
 230 // TODO: The void* cookie can probably be templatized, thus also allowing
 231 // const data structures.
 232 template< class OutStream, class ErrStream >
 233 child
 234 fork(void (*start)(void*), const OutStream& outsb,
 235      const ErrStream& errsb, void* v)
 236 {
 237     atf_process_child_t c;
 238
 239     detail::flush_streams();
 240     atf_error_t err = atf_process_fork(&c, start, outsb.get_sb(),
 241                                        errsb.get_sb(), v);
 242     if (atf_is_error(err))
 243         throw_atf_error(err);
 244
 245     return child(c);
 246 }
 247
 248 template< class OutStream, class ErrStream >
 249 status
 250 exec(const atf::fs::path& prog, const argv_array& argv,
 251      const OutStream& outsb, const ErrStream& errsb,
 252      void (*prehook)(void))
 253 {
 254     atf_process_status_t s;
 255
 256     detail::flush_streams();
 257     atf_error_t err = atf_process_exec_array(&s, prog.c_path(),
 258                                              argv.exec_argv(),
 259                                              outsb.get_sb(),
 260                                              errsb.get_sb(),
 261                                              prehook);
 262     if (atf_is_error(err))
 263         throw_atf_error(err);
 264
 265     return status(s);
 266 }
 267
 268 template< class OutStream, class ErrStream >
 269 status
 270 exec(const atf::fs::path& prog, const argv_array& argv,
 271      const OutStream& outsb, const ErrStream& errsb)
 272 {
 273     return exec(prog, argv, outsb, errsb, NULL);
 274 }
 275
 276 } // namespace process
 277 } // namespace atf
 278
 279 #endif // !defined(_ATF_CXX_PROCESS_HPP_)