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List:       kde-devel
Subject:    Environment variable setters/getters?
From:       Angus Leeming <leeming () lyx ! org>
Date:       2005-12-19 13:14:22
Message-ID: do6bhb$g0g$1 () sea ! gmane ! org
[Download RAW message or body]

Are there any K (or Q) wrappers for getenv, setenv/putenv?
([GS]etEnvironmentVariable on Windows). I can't see any but I'm likely
looking in the wrong place ;-)

For info, I attach the implementation I've been using in QDVI
(http://sourceforge.net/projects/qdvi/).

Thoughts? Perhaps it should be turned into a class?

Regards,
Angus

["environment.cpp" (text/x-c++src)]

// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; c-brace-offset: 0; -*-
/**
 * \file environment.cpp
 * Distributed under the GNU GPL version 2 or (at your option)
 * any later version. See accompanying file COPYING or copy at
 * http://www.gnu.org/copyleft/gpl.html
 *
 * \author Angus Leeming
 * \author João Luis M. Assirati
 * \author Lars Gullik Bjønnes
 */

#include <config.h>

#include "environment.h"
#include "os.h"

#include <QMap>
#include <QString>
#include <QStringList>

#include <cstdlib>


namespace kvs {

QString const getEnv(const QString& envname)
{
  const char* const ch = ::getenv(envname.toLocal8Bit());
  return !ch ? QString() : ch;
}


bool setEnv(const QString& name, QString const& value)
{
#if defined (HAVE_SETENV)
  const int retval = ::setenv(name.toLocal8Bit(), value.local8Bit(), true);

#elif defined (HAVE_PUTENV)
  static QMap<QString, QByteArray> varmap;

  const QByteArray envstr = QString(name + '=' + value).toLocal8Bit();
  const char* const envcstr = envstr;
  const int retval = ::putenv(const_cast<char *>(envcstr));
  varmap[name] = envstr;

#else
#error No environment-setting function has been defined.
#endif
  return retval == 0;
}


QStringList const getEnvPath(const QString& name)
{
#if defined _WIN32
  const char path_separator = ';';
#else
  const char path_separator = ':';
#endif

  return getEnv(name).split(path_separator);
}

} // namespace kvs


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