getenv.cc

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// ======================================================================
//
// getenv: Obtain value of environment variable; throw if none such
//
// ======================================================================

#include "cetlib/getenv.h"

#include "cetlib_except/exception.h"
#include <cstdlib>

// ======================================================================

std::string
cet::getenv(std::string const& name)
{
  char const* p = std::getenv(name.c_str());
  if (p == nullptr) {
    throw cet::exception{"getenv"}
      << "Can't find an environment variable named \"" << name << '\"';
  }
  return p;
}

std::string
cet::getenv(std::string const& name, std::nothrow_t)
{
  char const* p = std::getenv(name.c_str());
  if (p == nullptr) {
    p = "";
  }
  return p;
}