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 "libtest/yatlcon.h"
  38
  39 #include "libtest/common.h"
  40
  41 using namespace libtest;
  42
  43 #include <cstdlib>
  44 #include <cstring>
  45 #include <cerrno>
  46 #include <fcntl.h>
  47 #include <fstream>
  48 #include <memory>
  49 #ifdef HAVE_POLL_H
  50 # include <poll.h>
  51 #endif
  52 #ifdef HAVE_SPAWN_H
  53 # include <spawn.h>
  54 #endif
  55 #include <sstream>
  56 #include <string>
  57 #include <sys/stat.h>
  58 #include <sys/types.h>
  59 #include <unistd.h>
  60
  61 #include <algorithm>
  62
  63 #ifndef __USE_GNU
  64 static char **environ= NULL;
  65 #endif
  66
  67 #ifndef FD_CLOEXEC
  68 # define FD_CLOEXEC 0
  69 #endif
  70
  71 namespace {
  72
  73   std::string print_argv(libtest::vchar_ptr_t& built_argv)
  74   {
  75     std::stringstream arg_buffer;
  76
  77     for (vchar_ptr_t::iterator iter= built_argv.begin();
  78          iter != built_argv.end();
  79          ++iter)
  80     {
  81       arg_buffer << *iter << " ";
  82     }
  83
  84     return arg_buffer.str();
  85   }
  86
  87 #if 0
  88   std::string print_argv(char** argv)
  89   {
  90     std::stringstream arg_buffer;
  91
  92     for (char** ptr= argv; *ptr; ++ptr)
  93     {
  94       arg_buffer << *ptr << " ";
  95     }
  96
  97     return arg_buffer.str();
  98   }
  99 #endif
 100
 101   static Application::error_t int_to_error_t(int arg)
 102   {
 103     switch (arg)
 104     {
 105     case 127:
 106       return Application::INVALID_POSIX_SPAWN;
 107
 108     case 0:
 109       return Application::SUCCESS;
 110
 111     case 1:
 112       return Application::FAILURE;
 113
 114     default:
 115       return Application::UNKNOWN;
 116     }
 117   }
 118 }
 119
 120 namespace libtest {
 121
 122 Application::Application(const std::string& arg, const bool _use_libtool_arg) :
 123   _use_libtool(_use_libtool_arg),
 124   _use_valgrind(false),
 125   _use_gdb(false),
 126   _use_ptrcheck(false),
 127   _will_fail(false),
 128   _argc(0),
 129   _exectuble(arg),
 130   stdin_fd(STDIN_FILENO),
 131   stdout_fd(STDOUT_FILENO),
 132   stderr_fd(STDERR_FILENO),
 133   _pid(-1),
 134   _status(0),
 135   _app_exit_state(UNINITIALIZED)
 136   {
 137     if (_use_libtool)
 138     {
 139       if (libtool() == NULL)
 140       {
 141         fatal_message("libtool requested, but know libtool was found");
 142       }
 143     }
 144
 145     // Find just the name of the application with no path
 146     {
 147       size_t found= arg.find_last_of("/\\");
 148       if (found)
 149       {
 150         _exectuble_name= arg.substr(found +1);
 151       }
 152       else
 153       {
 154         _exectuble_name= arg;
 155       }
 156     }
 157
 158     if (_use_libtool and getenv("PWD"))
 159     {
 160       _exectuble_with_path+= getenv("PWD");
 161       _exectuble_with_path+= "/";
 162     }
 163     _exectuble_with_path+= _exectuble;
 164   }
 165
 166 Application::~Application()
 167 {
 168   murder();
 169   delete_argv();
 170 }
 171
 172 Application::error_t Application::run(const char *args[])
 173 {
 174   stdin_fd.reset();
 175   stdout_fd.reset();
 176   stderr_fd.reset();
 177   _stdout_buffer.clear();
 178   _stderr_buffer.clear();
 179
 180   posix_spawn_file_actions_t file_actions;
 181   posix_spawn_file_actions_init(&file_actions);
 182
 183   stdin_fd.dup_for_spawn(file_actions);
 184   stdout_fd.dup_for_spawn(file_actions);
 185   stderr_fd.dup_for_spawn(file_actions);
 186
 187   posix_spawnattr_t spawnattr;
 188   posix_spawnattr_init(&spawnattr);
 189
 190   short flags= 0;
 191
 192   // Child should not block signals
 193   flags |= POSIX_SPAWN_SETSIGMASK;
 194
 195   sigset_t mask;
 196   sigemptyset(&mask);
 197
 198   fatal_assert(posix_spawnattr_setsigmask(&spawnattr, &mask) == 0);
 199
 200 #if defined(POSIX_SPAWN_USEVFORK) || defined(__linux__)
 201   // Use USEVFORK on linux
 202   flags |= POSIX_SPAWN_USEVFORK;
 203 #endif
 204
 205   flags |= POSIX_SPAWN_SETPGROUP;
 206   fatal_assert(posix_spawnattr_setpgroup(&spawnattr, 0) == 0);
 207
 208   fatal_assert(posix_spawnattr_setflags(&spawnattr, flags) == 0);
 209
 210   create_argv(args);
 211
 212   int spawn_ret;
 213   if (_use_gdb)
 214   {
 215     std::string gdb_run_file= create_tmpfile(_exectuble_name);
 216     std::fstream file_stream;
 217     file_stream.open(gdb_run_file.c_str(), std::fstream::out | std::fstream::trunc);
 218
 219     _gdb_filename= create_tmpfile(_exectuble_name);
 220     file_stream
 221       << "set logging redirect on" << std::endl
 222       << "set logging file " << _gdb_filename << std::endl
 223       << "set logging overwrite on" << std::endl
 224       << "set logging on" << std::endl
 225       << "set environment LIBTEST_IN_GDB=1" << std::endl
 226       << "run " << arguments() << std::endl
 227       << "thread apply all bt" << std::endl
 228       << "quit" << std::endl;
 229
 230     fatal_assert(file_stream.good());
 231     file_stream.close();
 232
 233     if (_use_libtool)
 234     {
 235       // libtool --mode=execute gdb -f -x binary
 236       char *argv[]= {
 237         const_cast<char *>(libtool()),
 238         const_cast<char *>("--mode=execute"),
 239         const_cast<char *>("gdb"),
 240         const_cast<char *>("-batch"),
 241         const_cast<char *>("-f"),
 242         const_cast<char *>("-x"),
 243         const_cast<char *>(gdb_run_file.c_str()),
 244         const_cast<char *>(_exectuble_with_path.c_str()),
 245         0};
 246
 247       spawn_ret= posix_spawnp(&_pid, libtool(), &file_actions, &spawnattr, argv, environ);
 248     }
 249     else
 250     {
 251       // gdb binary
 252       char *argv[]= {
 253         const_cast<char *>("gdb"),
 254         const_cast<char *>("-batch"),
 255         const_cast<char *>("-f"),
 256         const_cast<char *>("-x"),
 257         const_cast<char *>(gdb_run_file.c_str()),
 258         const_cast<char *>(_exectuble_with_path.c_str()),
 259         0};
 260       spawn_ret= posix_spawnp(&_pid, "gdb", &file_actions, &spawnattr, argv, environ);
 261     }
 262   }
 263   else
 264   {
 265     spawn_ret= posix_spawn(&_pid, built_argv[0], &file_actions, &spawnattr, &built_argv[0], NULL);
 266   }
 267
 268   posix_spawn_file_actions_destroy(&file_actions);
 269   posix_spawnattr_destroy(&spawnattr);
 270
 271   stdin_fd.close(Application::Pipe::READ);
 272   stdout_fd.close(Application::Pipe::WRITE);
 273   stderr_fd.close(Application::Pipe::WRITE);
 274
 275   if (spawn_ret != 0)
 276   {
 277     if (_will_fail == false)
 278     {
 279       Error << strerror(spawn_ret) << "(" << spawn_ret << ")";
 280     }
 281     _pid= -1;
 282     return Application::INVALID_POSIX_SPAWN;
 283   }
 284
 285   assert(_pid != -1);
 286   if (_pid == -1)
 287   {
 288     return Application::INVALID_POSIX_SPAWN;
 289   }
 290
 291 #if 0
 292   app_thread_st* _app_thread= new app_thread_st(_pid, _status, built_argv[0], _app_exit_state);
 293   int error;
 294   if ((error= pthread_create(&_thread, NULL, &app_thread, _app_thread)) != 0)
 295   {
 296     Error << "pthread_create() died during pthread_create(" << strerror(error) << ")";
 297     return Application::FAILURE;
 298   }
 299 #endif
 300
 301   return Application::SUCCESS;
 302 }
 303
 304 bool Application::check() const
 305 {
 306   if (_pid > 1 and kill(_pid, 0) == 0)
 307   {
 308     return true;
 309   }
 310
 311   return false;
 312 }
 313
 314 void Application::murder()
 315 {
 316   if (check())
 317   {
 318     int count= 5;
 319     while ((count--) > 0 and check())
 320     {
 321       if (kill(_pid, SIGTERM) == 0)
 322       {
 323         join();
 324       }
 325       else
 326       {
 327         Error << "kill(pid, SIGTERM) failed after kill with error of " << strerror(errno);
 328         continue;
 329       }
 330
 331       break;
 332     }
 333
 334     // If for whatever reason it lives, kill it hard
 335     if (check())
 336     {
 337       Error << "using SIGKILL, things will likely go poorly from this point";
 338       (void)kill(_pid, SIGKILL);
 339     }
 340   }
 341   slurp();
 342 }
 343
 344 // false means that no data was returned
 345 bool Application::slurp()
 346 {
 347   struct pollfd fds[2];
 348   fds[0].fd= stdout_fd.fd();
 349   fds[0].events= POLLRDNORM;
 350   fds[0].revents= 0;
 351   fds[1].fd= stderr_fd.fd();
 352   fds[1].events= POLLRDNORM;
 353   fds[1].revents= 0;
 354
 355   int active_fd;
 356   if ((active_fd= poll(fds, 2, 0)) == -1)
 357   {
 358     int error;
 359     switch ((error= errno))
 360     {
 361 #ifdef TARGET_OS_LINUX
 362     case ERESTART:
 363 #endif
 364     case EINTR:
 365       break;
 366
 367     case EFAULT:
 368     case ENOMEM:
 369       fatal_message(strerror(error));
 370       break;
 371
 372     case EINVAL:
 373       fatal_message("RLIMIT_NOFILE exceeded, or if OSX the timeout value was invalid");
 374       break;
 375
 376     default:
 377       fatal_message(strerror(error));
 378       break;
 379     }
 380
 381     return false;
 382   }
 383
 384   if (active_fd == 0)
 385   {
 386     return false;
 387   }
 388
 389   bool data_was_read= false;
 390   if (fds[0].revents & POLLRDNORM)
 391   {
 392     if (stdout_fd.read(_stdout_buffer) == true)
 393     {
 394       data_was_read= true;
 395     }
 396   }
 397
 398   if (fds[1].revents & POLLRDNORM)
 399   {
 400     if (stderr_fd.read(_stderr_buffer) == true)
 401     {
 402       data_was_read= true;
 403     }
 404   }
 405
 406   return data_was_read;
 407 }
 408
 409 Application::error_t Application::join()
 410 {
 411   pid_t waited_pid= waitpid(_pid, &_status, 0);
 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 we terminted it on purpose then it counts as a success.
 441 #if defined(DEBUG)
 442       if (DEBUG)
 443       {
 444         Out << "waitpid() application terminated at request"
 445           << " pid:" << _pid
 446           << " name:" << built_argv[0];
 447       }
 448 #endif
 449     }
 450     else
 451     {
 452       _app_exit_state= Application::UNKNOWN;
 453       Error << "Unknown logic state at exit:" << WEXITSTATUS(_status)
 454         << " pid:" << _pid
 455         << " name:" << built_argv[0];
 456     }
 457   }
 458   else if (waited_pid == _pid and WIFEXITED(_status))
 459   {
 460     _app_exit_state= int_to_error_t(WEXITSTATUS(_status));
 461   }
 462   else if (waited_pid == -1)
 463   {
 464     _app_exit_state= Application::UNKNOWN;
 465     Error << "waitpid() returned errno:" << strerror(errno);
 466   }
 467   else
 468   {
 469     _app_exit_state= Application::UNKNOWN;
 470     throw std::logic_error("waitpid() returned an unknown value");
 471   }
 472
 473   return _app_exit_state;
 474 }
 475
 476 void Application::add_long_option(const std::string& name, const std::string& option_value)
 477 {
 478   std::string arg(name);
 479   arg+= option_value;
 480   _options.push_back(std::make_pair(arg, std::string()));
 481 }
 482
 483 void Application::add_option(const std::string& arg)
 484 {
 485   _options.push_back(std::make_pair(arg, std::string()));
 486 }
 487
 488 void Application::add_option(const std::string& name, const std::string& value)
 489 {
 490   _options.push_back(std::make_pair(name, value));
 491 }
 492
 493 Application::Pipe::Pipe(int arg) :
 494   _std_fd(arg)
 495 {
 496   _pipe_fd[READ]= -1;
 497   _pipe_fd[WRITE]= -1;
 498   _open[READ]= false;
 499   _open[WRITE]= false;
 500 }
 501
 502 int Application::Pipe::Pipe::fd()
 503 {
 504   if (_std_fd == STDOUT_FILENO)
 505   {
 506     return _pipe_fd[READ];
 507   }
 508   else if (_std_fd == STDERR_FILENO)
 509   {
 510     return _pipe_fd[READ];
 511   }
 512
 513   return _pipe_fd[WRITE]; // STDIN_FILENO
 514 }
 515
 516
 517 bool Application::Pipe::read(libtest::vchar_t& arg)
 518 {
 519   fatal_assert(_std_fd == STDOUT_FILENO or _std_fd == STDERR_FILENO);
 520
 521   bool data_was_read= false;
 522
 523   libtest::vchar_t buffer;
 524   buffer.resize(1024);
 525   ssize_t read_length;
 526   while ((read_length= ::read(_pipe_fd[READ], &buffer[0], buffer.size())))
 527   {
 528     if (read_length == -1)
 529     {
 530       switch(errno)
 531       {
 532       case EAGAIN:
 533         break;
 534
 535       default:
 536         Error << strerror(errno);
 537         break;
 538       }
 539
 540       break;
 541     }
 542
 543     data_was_read= true;
 544     arg.reserve(read_length +1);
 545     for (size_t x= 0; x < size_t(read_length); ++x)
 546     {
 547       arg.push_back(buffer[x]);
 548     }
 549     // @todo Suck up all errput code here
 550   }
 551
 552   return data_was_read;
 553 }
 554
 555 void Application::Pipe::nonblock()
 556 {
 557   int flags;
 558   {
 559     flags= fcntl(_pipe_fd[READ], F_GETFL, 0);
 560   } while (flags == -1 and (errno == EINTR or errno == EAGAIN));
 561
 562   if (flags == -1)
 563   {
 564     Error << "fcntl(F_GETFL) " << strerror(errno);
 565     throw strerror(errno);
 566   }
 567
 568   int rval;
 569   do
 570   {
 571     rval= fcntl(_pipe_fd[READ], F_SETFL, flags | O_NONBLOCK);
 572   } while (rval == -1 and (errno == EINTR or errno == EAGAIN));
 573
 574   if (rval == -1)
 575   {
 576     Error << "fcntl(F_SETFL) " << strerror(errno);
 577     throw strerror(errno);
 578   }
 579 }
 580
 581 void Application::Pipe::reset()
 582 {
 583   close(READ);
 584   close(WRITE);
 585
 586 #if defined(HAVE_PIPE2) && HAVE_PIPE2
 587   if (pipe2(_pipe_fd, O_NONBLOCK|O_CLOEXEC) == -1)
 588 #else
 589   if (pipe(_pipe_fd) == -1)
 590 #endif
 591   {
 592     fatal_message(strerror(errno));
 593   }
 594   _open[0]= true;
 595   _open[1]= true;
 596
 597 #if defined(HAVE_PIPE2) && HAVE_PIPE2
 598   return;
 599 #endif
 600   {
 601     nonblock();
 602     cloexec();
 603   }
 604 }
 605
 606 void Application::Pipe::cloexec()
 607 {
 608   //if (SOCK_CLOEXEC == 0)
 609   {
 610     if (FD_CLOEXEC)
 611     {
 612       int flags;
 613       do
 614       {
 615         flags= fcntl(_pipe_fd[WRITE], F_GETFD, 0);
 616       } while (flags == -1 and (errno == EINTR or errno == EAGAIN));
 617
 618       if (flags == -1)
 619       {
 620         Error << "fcntl(F_GETFD) " << strerror(errno);
 621         throw strerror(errno);
 622       }
 623
 624       int rval;
 625       do
 626       {
 627         rval= fcntl(_pipe_fd[WRITE], F_SETFD, flags | FD_CLOEXEC);
 628       } while (rval == -1 && (errno == EINTR or errno == EAGAIN));
 629
 630       if (rval == -1)
 631       {
 632         Error << "fcntl(F_SETFD) " << strerror(errno);
 633         throw strerror(errno);
 634       }
 635     }
 636   }
 637 }
 638
 639 Application::Pipe::~Pipe()
 640 {
 641   if (_pipe_fd[0] != -1)
 642   {
 643     ::close(_pipe_fd[0]);
 644   }
 645
 646   if (_pipe_fd[1] != -1)
 647   {
 648     ::close(_pipe_fd[1]);
 649   }
 650 }
 651
 652 void Application::Pipe::dup_for_spawn(posix_spawn_file_actions_t& file_actions)
 653 {
 654   int type= STDIN_FILENO == _std_fd ? 0 : 1;
 655
 656   int ret;
 657   if ((ret= posix_spawn_file_actions_adddup2(&file_actions, _pipe_fd[type], _std_fd )) < 0)
 658   {
 659     Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")";
 660     fatal_message(strerror(ret));
 661   }
 662
 663   if ((ret= posix_spawn_file_actions_addclose(&file_actions, _pipe_fd[type])) < 0)
 664   {
 665     Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")";
 666     fatal_message(strerror(ret));
 667   }
 668 }
 669
 670 void Application::Pipe::close(const close_t& arg)
 671 {
 672   int type= int(arg);
 673
 674   if (_open[type])
 675   {
 676     if (::close(_pipe_fd[type]) == -1)
 677     {
 678       Error << "close(" << strerror(errno) << ")";
 679     }
 680     _open[type]= false;
 681     _pipe_fd[type]= -1;
 682   }
 683 }
 684
 685 void Application::create_argv(const char *args[])
 686 {
 687   delete_argv();
 688   if (_use_libtool)
 689   {
 690     assert(libtool());
 691     vchar::append(built_argv, libtool());
 692     vchar::append(built_argv, "--mode=execute");
 693   }
 694
 695   if (_use_valgrind)
 696   {
 697     /*
 698       valgrind --error-exitcode=1 --leak-check=yes --track-fds=yes --malloc-fill=A5 --free-fill=DE
 699     */
 700     vchar::append(built_argv, "valgrind");
 701     vchar::append(built_argv, "--error-exitcode=1");
 702     vchar::append(built_argv, "--leak-check=yes");
 703 #if 0
 704     vchar::append(built_argv, "--show-reachable=yes"));
 705 #endif
 706     vchar::append(built_argv, "--track-fds=yes");
 707 #if 0
 708     built_argv[x++]= strdup("--track-origin=yes");
 709 #endif
 710     vchar::append(built_argv, "--malloc-fill=A5");
 711     vchar::append(built_argv, "--free-fill=DE");
 712
 713     std::string log_file= create_tmpfile("valgrind");
 714     libtest::vchar_t buffer;
 715     buffer.resize(1024);
 716     int length= snprintf(&buffer[0], buffer.size(), "--log-file=%s", log_file.c_str());
 717     fatal_assert(length > 0 and size_t(length) < buffer.size());
 718     vchar::append(built_argv, &buffer[0]);
 719   }
 720   else if (_use_ptrcheck)
 721   {
 722     /*
 723       valgrind --error-exitcode=1 --tool=exp-ptrcheck --log-file=
 724     */
 725     vchar::append(built_argv, "valgrind");
 726     vchar::append(built_argv, "--error-exitcode=1");
 727     vchar::append(built_argv, "--tool=exp-ptrcheck");
 728     std::string log_file= create_tmpfile("ptrcheck");
 729     libtest::vchar_t buffer;
 730     buffer.resize(1024);
 731     int length= snprintf(&buffer[0], buffer.size(), "--log-file=%s", log_file.c_str());
 732     fatal_assert(length > 0 and size_t(length) < buffer.size());
 733     vchar::append(built_argv, &buffer[0]);
 734   }
 735   else if (_use_gdb)
 736   {
 737     vchar::append(built_argv, "gdb");
 738   }
 739
 740   vchar::append(built_argv, _exectuble_with_path.c_str());
 741
 742   for (Options::const_iterator iter= _options.begin(); iter != _options.end(); ++iter)
 743   {
 744     vchar::append(built_argv, (*iter).first.c_str());
 745     if ((*iter).second.empty() == false)
 746     {
 747       vchar::append(built_argv, (*iter).second.c_str());
 748     }
 749   }
 750
 751   if (args)
 752   {
 753     for (const char **ptr= args; *ptr; ++ptr)
 754     {
 755       vchar::append(built_argv, *ptr);
 756     }
 757   }
 758   built_argv.push_back(NULL);
 759 }
 760
 761 std::string Application::print()
 762 {
 763   return print_argv(built_argv);
 764 }
 765
 766 std::string Application::arguments()
 767 {
 768   std::stringstream arg_buffer;
 769
 770   // Skip printing out the libtool reference
 771   for (size_t x= _use_libtool ? 2 : 0; x < _argc; ++x)
 772   {
 773     if (built_argv[x])
 774     {
 775       arg_buffer << built_argv[x] << " ";
 776     }
 777   }
 778
 779   return arg_buffer.str();
 780 }
 781
 782 void Application::delete_argv()
 783 {
 784   std::for_each(built_argv.begin(), built_argv.end(), FreeFromVector());
 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