git.m6w6.name Git - awesomized/libmemcached/blob - libtest/cmdline.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Data Differential YATL (i.e. libtest)  library
   4  *
   5  *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions are
   9  *  met:
  10  *
  11  *      * Redistributions of source code must retain the above copyright
  12  *  notice, this list of conditions and the following disclaimer.
  13  *
  14  *      * Redistributions in binary form must reproduce the above
  15  *  copyright notice, this list of conditions and the following disclaimer
  16  *  in the documentation and/or other materials provided with the
  17  *  distribution.
  18  *
  19  *      * The names of its contributors may not be used to endorse or
  20  *  promote products derived from this software without specific prior
  21  *  written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  29  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include "mem_config.h"
  38 #include "libtest/common.h"
  39
  40 using namespace libtest;
  41
  42 #include <cstdlib>
  43 #include <cstring>
  44 #include <cerrno>
  45 #include <fcntl.h>
  46 #include <fstream>
  47 #include <memory>
  48 #ifdef HAVE_POLL_H
  49 # include <poll.h>
  50 #endif
  51 #ifdef HAVE_SPAWN_H
  52 # include <spawn.h>
  53 #endif
  54 #include <sstream>
  55 #include <string>
  56 #include <sys/stat.h>
  57 #include <sys/types.h>
  58 #include <unistd.h>
  59
  60 #include <algorithm>
  61
  62 #ifndef __USE_GNU
  63 static char **environ= NULL;
  64 #endif
  65
  66 #ifndef FD_CLOEXEC
  67 # define FD_CLOEXEC 0
  68 #endif
  69
  70 namespace {
  71
  72   std::string print_argv(libtest::vchar_ptr_t& built_argv)
  73   {
  74     std::stringstream arg_buffer;
  75
  76     for (vchar_ptr_t::iterator iter= built_argv.begin();
  77          iter == built_argv.end();
  78          iter++)
  79     {
  80       arg_buffer << *iter << " ";
  81     }
  82
  83     return arg_buffer.str();
  84   }
  85
  86 #if 0
  87   std::string print_argv(char** argv)
  88   {
  89     std::stringstream arg_buffer;
  90
  91     for (char** ptr= argv; *ptr; ++ptr)
  92     {
  93       arg_buffer << *ptr << " ";
  94     }
  95
  96     return arg_buffer.str();
  97   }
  98 #endif
  99
 100   static Application::error_t int_to_error_t(int arg)
 101   {
 102     switch (arg)
 103     {
 104     case 127:
 105       return Application::INVALID_POSIX_SPAWN;
 106
 107     case 0:
 108       return Application::SUCCESS;
 109
 110     case 1:
 111       return Application::FAILURE;
 112
 113     default:
 114       return Application::UNKNOWN;
 115     }
 116   }
 117 }
 118
 119 namespace libtest {
 120
 121 Application::Application(const std::string& arg, const bool _use_libtool_arg) :
 122   _use_libtool(_use_libtool_arg),
 123   _use_valgrind(false),
 124   _use_gdb(false),
 125   _use_ptrcheck(false),
 126   _will_fail(false),
 127   _argc(0),
 128   _exectuble(arg),
 129   stdin_fd(STDIN_FILENO),
 130   stdout_fd(STDOUT_FILENO),
 131   stderr_fd(STDERR_FILENO),
 132   _pid(-1),
 133   _status(0),
 134   _app_exit_state(UNINITIALIZED)
 135   {
 136     if (_use_libtool)
 137     {
 138       if (libtool() == NULL)
 139       {
 140         fatal_message("libtool requested, but know libtool was found");
 141       }
 142     }
 143
 144     // Find just the name of the application with no path
 145     {
 146       size_t found= arg.find_last_of("/\\");
 147       if (found)
 148       {
 149         _exectuble_name= arg.substr(found +1);
 150       }
 151       else
 152       {
 153         _exectuble_name= arg;
 154       }
 155     }
 156
 157     if (_use_libtool and getenv("PWD"))
 158     {
 159       _exectuble_with_path+= getenv("PWD");
 160       _exectuble_with_path+= "/";
 161     }
 162     _exectuble_with_path+= _exectuble;
 163   }
 164
 165 Application::~Application()
 166 {
 167   murder();
 168   delete_argv();
 169 }
 170
 171 Application::error_t Application::run(const char *args[])
 172 {
 173   stdin_fd.reset();
 174   stdout_fd.reset();
 175   stderr_fd.reset();
 176   _stdout_buffer.clear();
 177   _stderr_buffer.clear();
 178
 179   posix_spawn_file_actions_t file_actions;
 180   posix_spawn_file_actions_init(&file_actions);
 181
 182   stdin_fd.dup_for_spawn(file_actions);
 183   stdout_fd.dup_for_spawn(file_actions);
 184   stderr_fd.dup_for_spawn(file_actions);
 185
 186   posix_spawnattr_t spawnattr;
 187   posix_spawnattr_init(&spawnattr);
 188
 189   short flags= 0;
 190
 191   // Child should not block signals
 192   flags |= POSIX_SPAWN_SETSIGMASK;
 193
 194   sigset_t mask;
 195   sigemptyset(&mask);
 196
 197   fatal_assert(posix_spawnattr_setsigmask(&spawnattr, &mask) == 0);
 198
 199 #if defined(POSIX_SPAWN_USEVFORK) || defined(__linux__)
 200   // Use USEVFORK on linux
 201   flags |= POSIX_SPAWN_USEVFORK;
 202 #endif
 203
 204   flags |= POSIX_SPAWN_SETPGROUP;
 205   fatal_assert(posix_spawnattr_setpgroup(&spawnattr, 0) == 0);
 206
 207   fatal_assert(posix_spawnattr_setflags(&spawnattr, flags) == 0);
 208
 209   create_argv(args);
 210
 211   int spawn_ret;
 212   if (_use_gdb)
 213   {
 214     std::string gdb_run_file= create_tmpfile(_exectuble_name);
 215     std::fstream file_stream;
 216     file_stream.open(gdb_run_file.c_str(), std::fstream::out | std::fstream::trunc);
 217
 218     _gdb_filename= create_tmpfile(_exectuble_name);
 219     file_stream
 220       << "set logging redirect on" << std::endl
 221       << "set logging file " << _gdb_filename << std::endl
 222       << "set logging overwrite on" << std::endl
 223       << "set logging on" << std::endl
 224       << "set environment LIBTEST_IN_GDB=1" << std::endl
 225       << "run " << arguments() << std::endl
 226       << "thread apply all bt" << std::endl
 227       << "quit" << std::endl;
 228
 229     fatal_assert(file_stream.good());
 230     file_stream.close();
 231
 232     if (_use_libtool)
 233     {
 234       // libtool --mode=execute gdb -f -x binary
 235       char *argv[]= {
 236         const_cast<char *>(libtool()),
 237         const_cast<char *>("--mode=execute"),
 238         const_cast<char *>("gdb"),
 239         const_cast<char *>("-batch"),
 240         const_cast<char *>("-f"),
 241         const_cast<char *>("-x"),
 242         const_cast<char *>(gdb_run_file.c_str()),
 243         const_cast<char *>(_exectuble_with_path.c_str()),
 244         0};
 245
 246       spawn_ret= posix_spawnp(&_pid, libtool(), &file_actions, &spawnattr, argv, environ);
 247     }
 248     else
 249     {
 250       // gdb binary
 251       char *argv[]= {
 252         const_cast<char *>("gdb"),
 253         const_cast<char *>("-batch"),
 254         const_cast<char *>("-f"),
 255         const_cast<char *>("-x"),
 256         const_cast<char *>(gdb_run_file.c_str()),
 257         const_cast<char *>(_exectuble_with_path.c_str()),
 258         0};
 259       spawn_ret= posix_spawnp(&_pid, "gdb", &file_actions, &spawnattr, argv, environ);
 260     }
 261   }
 262   else
 263   {
 264     spawn_ret= posix_spawn(&_pid, built_argv[0], &file_actions, &spawnattr, &built_argv[0], NULL);
 265   }
 266
 267   posix_spawn_file_actions_destroy(&file_actions);
 268   posix_spawnattr_destroy(&spawnattr);
 269
 270   stdin_fd.close(Application::Pipe::READ);
 271   stdout_fd.close(Application::Pipe::WRITE);
 272   stderr_fd.close(Application::Pipe::WRITE);
 273
 274   if (spawn_ret != 0)
 275   {
 276     if (_will_fail == false)
 277     {
 278       Error << strerror(spawn_ret) << "(" << spawn_ret << ")";
 279     }
 280     _pid= -1;
 281     return Application::INVALID_POSIX_SPAWN;
 282   }
 283
 284   assert(_pid != -1);
 285   if (_pid == -1)
 286   {
 287     return Application::INVALID_POSIX_SPAWN;
 288   }
 289
 290 #if 0
 291   app_thread_st* _app_thread= new app_thread_st(_pid, _status, built_argv[0], _app_exit_state);
 292   int error;
 293   if ((error= pthread_create(&_thread, NULL, &app_thread, _app_thread)) != 0)
 294   {
 295     Error << "pthread_create() died during pthread_create(" << strerror(error) << ")";
 296     return Application::FAILURE;
 297   }
 298 #endif
 299
 300   return Application::SUCCESS;
 301 }
 302
 303 bool Application::check() const
 304 {
 305   if (_pid > 1 and kill(_pid, 0) == 0)
 306   {
 307     return true;
 308   }
 309
 310   return false;
 311 }
 312
 313 void Application::murder()
 314 {
 315   if (check())
 316   {
 317     int count= 5;
 318     while ((count--) > 0 and check())
 319     {
 320       if (kill(_pid, SIGTERM) == 0)
 321       {
 322         join();
 323       }
 324       else
 325       {
 326         Error << "kill(pid, SIGTERM) failed after kill with error of " << strerror(errno);
 327         continue;
 328       }
 329
 330       break;
 331     }
 332
 333     // If for whatever reason it lives, kill it hard
 334     if (check())
 335     {
 336       Error << "using SIGKILL, things will likely go poorly from this point";
 337       (void)kill(_pid, SIGKILL);
 338     }
 339   }
 340   slurp();
 341 }
 342
 343 // false means that no data was returned
 344 bool Application::slurp()
 345 {
 346   struct pollfd fds[2];
 347   fds[0].fd= stdout_fd.fd();
 348   fds[0].events= POLLRDNORM;
 349   fds[0].revents= 0;
 350   fds[1].fd= stderr_fd.fd();
 351   fds[1].events= POLLRDNORM;
 352   fds[1].revents= 0;
 353
 354   int active_fd;
 355   if ((active_fd= poll(fds, 2, 0)) == -1)
 356   {
 357     int error;
 358     switch ((error= errno))
 359     {
 360 #ifdef TARGET_OS_LINUX
 361     case ERESTART:
 362 #endif
 363     case EINTR:
 364       break;
 365
 366     case EFAULT:
 367     case ENOMEM:
 368       fatal_message(strerror(error));
 369       break;
 370
 371     case EINVAL:
 372       fatal_message("RLIMIT_NOFILE exceeded, or if OSX the timeout value was invalid");
 373       break;
 374
 375     default:
 376       fatal_message(strerror(error));
 377       break;
 378     }
 379
 380     return false;
 381   }
 382
 383   if (active_fd == 0)
 384   {
 385     return false;
 386   }
 387
 388   bool data_was_read= false;
 389   if (fds[0].revents & POLLRDNORM)
 390   {
 391     if (stdout_fd.read(_stdout_buffer) == true)
 392     {
 393       data_was_read= true;
 394     }
 395   }
 396
 397   if (fds[1].revents & POLLRDNORM)
 398   {
 399     if (stderr_fd.read(_stderr_buffer) == true)
 400     {
 401       data_was_read= true;
 402     }
 403   }
 404
 405   return data_was_read;
 406 }
 407
 408 Application::error_t Application::join()
 409 {
 410   pid_t waited_pid= waitpid(_pid, &_status, 0);
 411
 412   if (waited_pid == _pid and WIFEXITED(_status) == false)
 413   {
 414     /*
 415       What we are looking for here is how the exit status happened.
 416       - 127 means that posix_spawn() itself had an error.
 417       - If WEXITSTATUS is positive we need to see if it is a signal that we sent to kill the process. If not something bad happened in the process itself.
 418       - Finally something has happened that we don't currently understand.
 419     */
 420     if (WEXITSTATUS(_status) == 127)
 421     {
 422       _app_exit_state= Application::INVALID_POSIX_SPAWN;
 423       std::string error_string("posix_spawn() failed pid:");
 424       error_string+= _pid;
 425       error_string+= " name:";
 426       error_string+= built_argv[0];
 427       throw std::logic_error(error_string);
 428     }
 429     else if WIFSIGNALED(_status)
 430     {
 431       if (WTERMSIG(_status) != SIGTERM and WTERMSIG(_status) != SIGHUP)
 432       {
 433         _app_exit_state= Application::INVALID_POSIX_SPAWN;
 434         std::string error_string(built_argv[0]);
 435         error_string+= " was killed by signal ";
 436         error_string+= strsignal(WTERMSIG(_status));
 437         throw std::runtime_error(error_string);
 438       }
 439
 440 #if 0
 441       // If we terminted it on purpose then it counts as a success.
 442       Out << "waitpid() application terminated at request"
 443         << " pid:" << _pid
 444         << " name:" << built_argv[0];
 445 #endif
 446     }
 447     else
 448     {
 449       _app_exit_state= Application::UNKNOWN;
 450       Error << "Unknown logic state at exit:" << WEXITSTATUS(_status)
 451         << " pid:" << _pid
 452         << " name:" << built_argv[0];
 453     }
 454   }
 455   else if (waited_pid == _pid and WIFEXITED(_status))
 456   {
 457     _app_exit_state= int_to_error_t(WEXITSTATUS(_status));
 458   }
 459   else if (waited_pid == -1)
 460   {
 461     _app_exit_state= Application::UNKNOWN;
 462     Error << "waitpid() returned errno:" << strerror(errno);
 463   }
 464   else
 465   {
 466     _app_exit_state= Application::UNKNOWN;
 467     throw std::logic_error("waitpid() returned an unknown value");
 468   }
 469
 470   return _app_exit_state;
 471 }
 472
 473 void Application::add_long_option(const std::string& name, const std::string& option_value)
 474 {
 475   std::string arg(name);
 476   arg+= option_value;
 477   _options.push_back(std::make_pair(arg, std::string()));
 478 }
 479
 480 void Application::add_option(const std::string& arg)
 481 {
 482   _options.push_back(std::make_pair(arg, std::string()));
 483 }
 484
 485 void Application::add_option(const std::string& name, const std::string& value)
 486 {
 487   _options.push_back(std::make_pair(name, value));
 488 }
 489
 490 Application::Pipe::Pipe(int arg) :
 491   _std_fd(arg)
 492 {
 493   _pipe_fd[READ]= -1;
 494   _pipe_fd[WRITE]= -1;
 495   _open[READ]= false;
 496   _open[WRITE]= false;
 497 }
 498
 499 int Application::Pipe::Pipe::fd()
 500 {
 501   if (_std_fd == STDOUT_FILENO)
 502   {
 503     return _pipe_fd[READ];
 504   }
 505   else if (_std_fd == STDERR_FILENO)
 506   {
 507     return _pipe_fd[READ];
 508   }
 509
 510   return _pipe_fd[WRITE]; // STDIN_FILENO
 511 }
 512
 513
 514 bool Application::Pipe::read(libtest::vchar_t& arg)
 515 {
 516   fatal_assert(_std_fd == STDOUT_FILENO or _std_fd == STDERR_FILENO);
 517
 518   bool data_was_read= false;
 519
 520   ssize_t read_length;
 521   char buffer[1024]= { 0 };
 522   while ((read_length= ::read(_pipe_fd[READ], buffer, sizeof(buffer))))
 523   {
 524     if (read_length == -1)
 525     {
 526       switch(errno)
 527       {
 528       case EAGAIN:
 529         break;
 530
 531       default:
 532         Error << strerror(errno);
 533         break;
 534       }
 535
 536       break;
 537     }
 538
 539     data_was_read= true;
 540     arg.reserve(read_length +1);
 541     for (size_t x= 0; x < size_t(read_length); ++x)
 542     {
 543       arg.push_back(buffer[x]);
 544     }
 545     // @todo Suck up all errput code here
 546   }
 547
 548   return data_was_read;
 549 }
 550
 551 void Application::Pipe::nonblock()
 552 {
 553   int flags;
 554   {
 555     flags= fcntl(_pipe_fd[READ], F_GETFL, 0);
 556   } while (flags == -1 and (errno == EINTR or errno == EAGAIN));
 557
 558   if (flags == -1)
 559   {
 560     Error << "fcntl(F_GETFL) " << strerror(errno);
 561     throw strerror(errno);
 562   }
 563
 564   int rval;
 565   do
 566   {
 567     rval= fcntl(_pipe_fd[READ], F_SETFL, flags | O_NONBLOCK);
 568   } while (rval == -1 and (errno == EINTR or errno == EAGAIN));
 569
 570   if (rval == -1)
 571   {
 572     Error << "fcntl(F_SETFL) " << strerror(errno);
 573     throw strerror(errno);
 574   }
 575 }
 576
 577 void Application::Pipe::reset()
 578 {
 579   close(READ);
 580   close(WRITE);
 581
 582 #if defined(HAVE_PIPE2) && HAVE_PIPE2
 583   if (pipe2(_pipe_fd, O_NONBLOCK|O_CLOEXEC) == -1)
 584 #else
 585   if (pipe(_pipe_fd) == -1)
 586 #endif
 587   {
 588     fatal_message(strerror(errno));
 589   }
 590   _open[0]= true;
 591   _open[1]= true;
 592
 593 #if defined(HAVE_PIPE2) && HAVE_PIPE2
 594   {
 595     nonblock();
 596     cloexec();
 597   }
 598 #endif
 599 }
 600
 601 void Application::Pipe::cloexec()
 602 {
 603   //if (SOCK_CLOEXEC == 0)
 604   {
 605     if (FD_CLOEXEC)
 606     {
 607       int flags;
 608       do
 609       {
 610         flags= fcntl(_pipe_fd[WRITE], F_GETFD, 0);
 611       } while (flags == -1 and (errno == EINTR or errno == EAGAIN));
 612
 613       if (flags == -1)
 614       {
 615         Error << "fcntl(F_GETFD) " << strerror(errno);
 616         throw strerror(errno);
 617       }
 618
 619       int rval;
 620       do
 621       {
 622         rval= fcntl(_pipe_fd[WRITE], F_SETFD, flags | FD_CLOEXEC);
 623       } while (rval == -1 && (errno == EINTR or errno == EAGAIN));
 624
 625       if (rval == -1)
 626       {
 627         Error << "fcntl(F_SETFD) " << strerror(errno);
 628         throw strerror(errno);
 629       }
 630     }
 631   }
 632 }
 633
 634 Application::Pipe::~Pipe()
 635 {
 636   if (_pipe_fd[0] != -1)
 637   {
 638     ::close(_pipe_fd[0]);
 639   }
 640
 641   if (_pipe_fd[1] != -1)
 642   {
 643     ::close(_pipe_fd[1]);
 644   }
 645 }
 646
 647 void Application::Pipe::dup_for_spawn(posix_spawn_file_actions_t& file_actions)
 648 {
 649   int type= STDIN_FILENO == _std_fd ? 0 : 1;
 650
 651   int ret;
 652   if ((ret= posix_spawn_file_actions_adddup2(&file_actions, _pipe_fd[type], _std_fd )) < 0)
 653   {
 654     Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")";
 655     fatal_message(strerror(ret));
 656   }
 657
 658   if ((ret= posix_spawn_file_actions_addclose(&file_actions, _pipe_fd[type])) < 0)
 659   {
 660     Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")";
 661     fatal_message(strerror(ret));
 662   }
 663 }
 664
 665 void Application::Pipe::close(const close_t& arg)
 666 {
 667   int type= int(arg);
 668
 669   if (_open[type])
 670   {
 671     if (::close(_pipe_fd[type]) == -1)
 672     {
 673       Error << "close(" << strerror(errno) << ")";
 674     }
 675     _open[type]= false;
 676     _pipe_fd[type]= -1;
 677   }
 678 }
 679
 680 void Application::create_argv(const char *args[])
 681 {
 682   delete_argv();
 683   if (_use_libtool)
 684   {
 685     assert(libtool());
 686     built_argv.push_back(strdup(libtool()));
 687     built_argv.push_back(strdup("--mode=execute"));
 688   }
 689
 690   if (_use_valgrind)
 691   {
 692     /*
 693       valgrind --error-exitcode=1 --leak-check=yes --track-fds=yes --malloc-fill=A5 --free-fill=DE
 694     */
 695     built_argv.push_back(strdup("valgrind"));
 696     built_argv.push_back(strdup("--error-exitcode=1"));
 697     built_argv.push_back(strdup("--leak-check=yes"));
 698 #if 0
 699     built_argv.push_back(strdup("--show-reachable=yes"));
 700 #endif
 701     built_argv.push_back(strdup("--track-fds=yes"));
 702 #if 0
 703     built_argv[x++]= strdup("--track-origin=yes");
 704 #endif
 705     built_argv.push_back(strdup("--malloc-fill=A5"));
 706     built_argv.push_back(strdup("--free-fill=DE"));
 707
 708     std::string log_file= create_tmpfile("valgrind");
 709     char buffer[1024];
 710     int length= snprintf(buffer, sizeof(buffer), "--log-file=%s", log_file.c_str());
 711     fatal_assert(length > 0 and size_t(length) < sizeof(buffer));
 712     built_argv.push_back(strdup(buffer));
 713   }
 714   else if (_use_ptrcheck)
 715   {
 716     /*
 717       valgrind --error-exitcode=1 --tool=exp-ptrcheck --log-file=
 718     */
 719     built_argv.push_back(strdup("valgrind"));
 720     built_argv.push_back(strdup("--error-exitcode=1"));
 721     built_argv.push_back(strdup("--tool=exp-ptrcheck"));
 722     std::string log_file= create_tmpfile("ptrcheck");
 723     char buffer[1024];
 724     int length= snprintf(buffer, sizeof(buffer), "--log-file=%s", log_file.c_str());
 725     fatal_assert(length > 0 and size_t(length) < sizeof(buffer));
 726     built_argv.push_back(strdup(buffer));
 727   }
 728   else if (_use_gdb)
 729   {
 730     built_argv.push_back(strdup("gdb"));
 731   }
 732
 733   built_argv.push_back(strdup(_exectuble_with_path.c_str()));
 734
 735   for (Options::const_iterator iter= _options.begin(); iter != _options.end(); ++iter)
 736   {
 737     built_argv.push_back(strdup((*iter).first.c_str()));
 738     if ((*iter).second.empty() == false)
 739     {
 740       built_argv.push_back(strdup((*iter).second.c_str()));
 741     }
 742   }
 743
 744   if (args)
 745   {
 746     for (const char **ptr= args; *ptr; ++ptr)
 747     {
 748       built_argv.push_back(strdup(*ptr));
 749     }
 750   }
 751   built_argv.push_back(NULL);
 752 }
 753
 754 std::string Application::print()
 755 {
 756   return print_argv(built_argv);
 757 }
 758
 759 std::string Application::arguments()
 760 {
 761   std::stringstream arg_buffer;
 762
 763   for (size_t x= (1 +_use_libtool) ? 2 : 0;
 764        x < _argc and built_argv[x];
 765        ++x)
 766   {
 767     arg_buffer << built_argv[x] << " ";
 768   }
 769
 770   return arg_buffer.str();
 771 }
 772
 773 struct DeleteFromVector
 774 {
 775   template <class T>
 776     void operator() ( T* ptr) const
 777     {
 778       free(ptr);
 779     }
 780 };
 781
 782 void Application::delete_argv()
 783 {
 784   std::for_each(built_argv.begin(), built_argv.end(), DeleteFromVector());
 785
 786   built_argv.clear();
 787   _argc= 0;
 788 }
 789
 790
 791 int exec_cmdline(const std::string& command, const char *args[], bool use_libtool)
 792 {
 793   Application app(command, use_libtool);
 794
 795   Application::error_t ret= app.run(args);
 796
 797   if (ret != Application::SUCCESS)
 798   {
 799     return int(ret);
 800   }
 801
 802   return int(app.join());
 803 }
 804
 805 const char *gearmand_binary()
 806 {
 807   return GEARMAND_BINARY;
 808 }
 809
 810 const char *drizzled_binary()
 811 {
 812   return DRIZZLED_BINARY;
 813 }
 814
 815 } // namespace exec_cmdline