gearman/libtest/memcached.cc

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 *  libtest
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#include <libtest/common.h>

#include <libmemcached/memcached.h>
#include <libmemcached/util.h>

using namespace libtest;

#include <cassert>
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <libtest/server.h>
#include <libtest/wait.h>

#include <libtest/memcached.h>

#ifndef __INTEL_COMPILER
#pragma GCC diagnostic ignored "-Wold-style-cast"
#endif

using namespace libtest;

class Memcached : public Server
{
public:
  Memcached(const std::string& host_arg, const in_port_t port_arg, const bool is_socket_arg) :
    Server(host_arg, port_arg, is_socket_arg)
  { }

  pid_t get_pid(bool error_is_ok)
  {
    // Memcached is slow to start, so we need to do this
    if (not pid_file().empty())
    {
      Wait wait(pid_file(), 0);

      if (error_is_ok and not wait.successful())
      {
        Error << "Pidfile was not found:" << pid_file();
        return -1;
      }
    }

    pid_t local_pid;
    memcached_return_t rc;
    if (has_socket())
    {
      local_pid= libmemcached_util_getpid(socket().c_str(), port(), &rc);
    }
    else
    {
      local_pid= libmemcached_util_getpid(hostname().c_str(), port(), &rc);
    }

    if (error_is_ok and ((memcached_failed(rc) or local_pid < 1)))
    {
      Error << "libmemcached_util_getpid(" << memcached_strerror(NULL, rc) << ") pid: " << local_pid << " for:" << *this;
    }

    return local_pid;
  }

  bool ping()
  {
    // Memcached is slow to start, so we need to do this
    if (not pid_file().empty())
    {
      Wait wait(pid_file(), 0);

      if (not wait.successful())
      {
        Error << "Pidfile was not found:" << pid_file();
        return -1;
      }
    }

    memcached_return_t rc;
    bool ret;
    if (has_socket())
    {
      ret= libmemcached_util_ping(socket().c_str(), 0, &rc);
    }
    else
    {
      ret= libmemcached_util_ping(hostname().c_str(), port(), &rc);
    }

    if (memcached_failed(rc) or not ret)
    {
      Error << "libmemcached_util_ping(" << memcached_strerror(NULL, rc) << ")";
    }
    return ret;
  }

  const char *name()
  {
    return "memcached";
  };

  const char *executable()
  {
    return MEMCACHED_BINARY;
  }

  const char *pid_file_option()
  {
    return "-P ";
  }

  const char *socket_file_option() const
  {
    return "-s ";
  }

  const char *daemon_file_option()
  {
    return "-d";
  }

  const char *log_file_option()
  {
    return NULL;
  }

  const char *port_option()
  {
    return "-p ";
  }

  bool is_libtool()
  {
    return false;
  }

  // Memcached's pidfile is broken
  bool broken_pid_file()
  {
    return true;
  }

  bool build(int argc, const char *argv[]);
};


#include <sstream>

bool Memcached::build(int argc, const char *argv[])
{
  std::stringstream arg_buffer;

  if (getuid() == 0 or geteuid() == 0)
  {
    arg_buffer << " -u root ";
  }

  for (int x= 1 ; x < argc ; x++)
  {
    arg_buffer << " " << argv[x] << " ";
  }

  set_extra_args(arg_buffer.str());

  return true;
}

namespace libtest {

Server *build_memcached(const std::string& hostname, const in_port_t try_port)
{
  return new Memcached(hostname, try_port, false);
}

Server *build_memcached_socket(const std::string& hostname, const in_port_t try_port)
{
  return new Memcached(hostname, try_port, true);
}

}