git.m6w6.name Git - awesomized/libmemcached/blob - libtest/server.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/
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  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  35  */
  36
  37 #include <config.h>
  38 #include <libtest/common.h>
  39
  40 #include <cassert>
  41 #include <cerrno>
  42 #include <climits>
  43 #include <cstdlib>
  44 #include <iostream>
  45
  46 #include <algorithm>
  47 #include <functional>
  48 #include <locale>
  49 #include <unistd.h>
  50
  51 // trim from end
  52 static inline std::string &rtrim(std::string &s)
  53 {
  54   s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
  55   return s;
  56 }
  57
  58 #include <libtest/server.h>
  59 #include <libtest/stream.h>
  60 #include <libtest/killpid.h>
  61
  62 namespace libtest {
  63
  64 std::ostream& operator<<(std::ostream& output, const Server &arg)
  65 {
  66   if (arg.is_socket())
  67   {
  68     output << arg.hostname();
  69   }
  70   else
  71   {
  72     output << arg.hostname() << ":" << arg.port();
  73   }
  74
  75   if (arg.has_pid())
  76   {
  77     output << " Pid:" <<  arg.pid();
  78   }
  79
  80   if (arg.has_socket())
  81   {
  82     output << " Socket:" <<  arg.socket();
  83   }
  84
  85   if (arg.running().empty() == false)
  86   {
  87     output << " Exec:" <<  arg.running();
  88   }
  89
  90   return output;  // for multiple << operators
  91 }
  92
  93 #define MAGIC_MEMORY 123570
  94
  95 Server::Server(const std::string& host_arg, const in_port_t port_arg,
  96                const std::string& executable, const bool _is_libtool,
  97                bool is_socket_arg) :
  98   _magic(MAGIC_MEMORY),
  99   _is_socket(is_socket_arg),
 100   _port(port_arg),
 101   _hostname(host_arg),
 102   _app(executable, _is_libtool)
 103 {
 104 }
 105
 106 Server::~Server()
 107 {
 108 }
 109
 110 bool Server::check()
 111 {
 112   _app.slurp();
 113   _app.check();
 114   return true;
 115 }
 116
 117 bool Server::validate()
 118 {
 119   return _magic == MAGIC_MEMORY;
 120 }
 121
 122 // If the server exists, kill it
 123 bool Server::cycle()
 124 {
 125   uint32_t limit= 3;
 126
 127   // Try to ping, and kill the server #limit number of times
 128   while (--limit and
 129          is_pid_valid(_app.pid()))
 130   {
 131     if (kill())
 132     {
 133       Log << "Killed existing server," << *this;
 134       dream(0, 50000);
 135       continue;
 136     }
 137   }
 138
 139   // For whatever reason we could not kill it, and we reached limit
 140   if (limit == 0)
 141   {
 142     Error << "Reached limit, could not kill server";
 143     return false;
 144   }
 145
 146   return true;
 147 }
 148
 149 bool Server::wait_for_pidfile() const
 150 {
 151   Wait wait(pid_file(), 4);
 152
 153   return wait.successful();
 154 }
 155
 156 bool Server::has_pid() const
 157 {
 158   return (_app.pid() > 1);
 159 }
 160
 161
 162 bool Server::start()
 163 {
 164   // If we find that we already have a pid then kill it.
 165   if (has_pid() == true)
 166   {
 167 #if 0
 168     fatal_message("has_pid() failed, programer error");
 169 #endif
 170   }
 171
 172   // This needs more work.
 173 #if 0
 174   if (gdb_is_caller())
 175   {
 176     _app.use_gdb();
 177   }
 178 #endif
 179
 180   if (getenv("YATL_PTRCHECK_SERVER"))
 181   {
 182     _app.use_ptrcheck();
 183   }
 184   else if (getenv("YATL_VALGRIND_SERVER"))
 185   {
 186     _app.use_valgrind();
 187   }
 188
 189   if (args(_app) == false)
 190   {
 191     Error << "Could not build command()";
 192     return false;
 193   }
 194
 195   Application::error_t ret;
 196   if (Application::SUCCESS !=  (ret= _app.run()))
 197   {
 198     Error << "Application::run() " << ret;
 199     return false;
 200   }
 201   _running= _app.print();
 202
 203   if (valgrind_is_caller())
 204   {
 205     dream(5, 50000);
 206   }
 207
 208   size_t repeat= 5;
 209   _app.slurp();
 210   while (--repeat)
 211   {
 212     if (pid_file().empty() == false)
 213     {
 214       Wait wait(pid_file(), 8);
 215
 216       if (wait.successful() == false)
 217       {
 218         if (_app.check())
 219         {
 220           _app.slurp();
 221           continue;
 222         }
 223
 224         char buf[PATH_MAX];
 225         char *getcwd_buf= getcwd(buf, sizeof(buf));
 226         throw libtest::fatal(LIBYATL_DEFAULT_PARAM,
 227                              "Unable to open pidfile in %s for: %s stderr:%s",
 228                              getcwd_buf ? getcwd_buf : "",
 229                              _running.c_str(),
 230                              _app.stderr_c_str());
 231       }
 232     }
 233   }
 234
 235   uint32_t this_wait= 0;
 236   bool pinged= false;
 237   {
 238     uint32_t timeout= 20; // This number should be high enough for valgrind startup (which is slow)
 239     uint32_t waited;
 240     uint32_t retry;
 241
 242     for (waited= 0, retry= 1; ; retry++, waited+= this_wait)
 243     {
 244       if ((pinged= ping()) == true)
 245       {
 246         break;
 247       }
 248       else if (waited >= timeout)
 249       {
 250         break;
 251       }
 252
 253       this_wait= retry * retry / 3 + 1;
 254       libtest::dream(this_wait, 0);
 255     }
 256   }
 257
 258   if (pinged == false)
 259   {
 260     // If we happen to have a pid file, lets try to kill it
 261     if ((pid_file().empty() == false) and (access(pid_file().c_str(), R_OK) == 0))
 262     {
 263       _app.slurp();
 264       if (kill_file(pid_file()) == false)
 265       {
 266         throw libtest::fatal(LIBYATL_DEFAULT_PARAM,
 267                              "Failed to kill off server, waited: %u after startup occurred, when pinging failed: %.*s stderr:%.*s",
 268                              this_wait,
 269                              int(_running.size()), _running.c_str(),
 270                              int(_app.stderr_result_length()), _app.stderr_c_str());
 271       }
 272
 273       throw libtest::fatal(LIBYATL_DEFAULT_PARAM,
 274                            "Failed native ping(), pid: %d is alive: %s waited: %u server started, having pid_file. exec: %.*s stderr:%.*s",
 275                            int(_app.pid()),
 276                            _app.check() ? "true" : "false",
 277                            this_wait,
 278                            int(_running.size()), _running.c_str(),
 279                            int(_app.stderr_result_length()), _app.stderr_c_str());
 280     }
 281     else
 282     {
 283       throw libtest::fatal(LIBYATL_DEFAULT_PARAM,
 284                            "Failed native ping(), pid: %d is alive: %s waited: %u server started. exec: %.*s stderr:%.*s",
 285                            int(_app.pid()),
 286                            _app.check() ? "true" : "false",
 287                            this_wait,
 288                            int(_running.size()), _running.c_str(),
 289                            int(_app.stderr_result_length()), _app.stderr_c_str());
 290     }
 291     _running.clear();
 292     return false;
 293   }
 294
 295   return has_pid();
 296 }
 297
 298 void Server::reset_pid()
 299 {
 300   _running.clear();
 301   _pid_file.clear();
 302 }
 303
 304 pid_t Server::pid() const
 305 {
 306   return _app.pid();
 307 }
 308
 309 void Server::add_option(const std::string& arg)
 310 {
 311   _options.push_back(std::make_pair(arg, std::string()));
 312 }
 313
 314 void Server::add_option(const std::string& name, const std::string& value)
 315 {
 316   _options.push_back(std::make_pair(name, value));
 317 }
 318
 319 bool Server::set_socket_file()
 320 {
 321   char file_buffer[FILENAME_MAX];
 322   file_buffer[0]= 0;
 323
 324   if (broken_pid_file())
 325   {
 326     snprintf(file_buffer, sizeof(file_buffer), "/tmp/%s.socketXXXXXX", name());
 327   }
 328   else
 329   {
 330     snprintf(file_buffer, sizeof(file_buffer), "var/run/%s.socketXXXXXX", name());
 331   }
 332
 333   int fd;
 334   if ((fd= mkstemp(file_buffer)) == -1)
 335   {
 336     perror(file_buffer);
 337     return false;
 338   }
 339   close(fd);
 340   unlink(file_buffer);
 341
 342   _socket= file_buffer;
 343
 344   return true;
 345 }
 346
 347 bool Server::set_pid_file()
 348 {
 349   char file_buffer[FILENAME_MAX];
 350   file_buffer[0]= 0;
 351
 352   if (broken_pid_file())
 353   {
 354     snprintf(file_buffer, sizeof(file_buffer), "/tmp/%s.pidXXXXXX", name());
 355   }
 356   else
 357   {
 358     snprintf(file_buffer, sizeof(file_buffer), "var/run/%s.pidXXXXXX", name());
 359   }
 360
 361   int fd;
 362   if ((fd= mkstemp(file_buffer)) == -1)
 363   {
 364     throw libtest::fatal(LIBYATL_DEFAULT_PARAM, "mkstemp() failed on %s with %s", file_buffer, strerror(errno));
 365   }
 366   close(fd);
 367   unlink(file_buffer);
 368
 369   _pid_file= file_buffer;
 370
 371   return true;
 372 }
 373
 374 bool Server::set_log_file()
 375 {
 376   char file_buffer[FILENAME_MAX];
 377   file_buffer[0]= 0;
 378
 379   snprintf(file_buffer, sizeof(file_buffer), "var/log/%s.logXXXXXX", name());
 380   int fd;
 381   if ((fd= mkstemp(file_buffer)) == -1)
 382   {
 383     throw libtest::fatal(LIBYATL_DEFAULT_PARAM, "mkstemp() failed on %s with %s", file_buffer, strerror(errno));
 384   }
 385   close(fd);
 386
 387   _log_file= file_buffer;
 388
 389   return true;
 390 }
 391
 392 bool Server::args(Application& app)
 393 {
 394
 395   // Set a log file if it was requested (and we can)
 396   if (has_log_file_option())
 397   {
 398     set_log_file();
 399     log_file_option(app, _log_file);
 400   }
 401
 402   if (getenv("LIBTEST_SYSLOG") and has_syslog())
 403   {
 404     app.add_option("--syslog");
 405   }
 406
 407   // Update pid_file
 408   {
 409     if (_pid_file.empty() and set_pid_file() == false)
 410     {
 411       return false;
 412     }
 413
 414     pid_file_option(app, pid_file());
 415   }
 416
 417   if (has_socket_file_option())
 418   {
 419     if (set_socket_file() == false)
 420     {
 421       return false;
 422     }
 423
 424     socket_file_option(app, _socket);
 425   }
 426
 427   if (has_port_option())
 428   {
 429     port_option(app, _port);
 430   }
 431
 432   for (Options::const_iterator iter= _options.begin(); iter != _options.end(); iter++)
 433   {
 434     if ((*iter).second.empty() == false)
 435     {
 436       app.add_option((*iter).first, (*iter).second);
 437     }
 438     else
 439     {
 440       app.add_option((*iter).first);
 441     }
 442   }
 443
 444   return true;
 445 }
 446
 447 bool Server::kill()
 448 {
 449   if (check_pid(_app.pid())) // If we kill it, reset
 450   {
 451     _app.murder();
 452     if (broken_pid_file() and pid_file().empty() == false)
 453     {
 454       unlink(pid_file().c_str());
 455     }
 456
 457     if (broken_socket_cleanup() and has_socket() and not socket().empty())
 458     {
 459       unlink(socket().c_str());
 460     }
 461
 462     reset_pid();
 463
 464     return true;
 465   }
 466
 467   return false;
 468 }
 469
 470 } // namespace libtest