Environment_UNIX.cpp

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// Environment_UNIX.cpp
//
// $Id: //poco/1.3/Foundation/src/Environment_UNIX.cpp#6 $
//
// Library: Foundation
// Package: Core
// Module:  Environment
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/Environment_UNIX.h"
#include "Poco/Exception.h"
#include <cstring>
#include <unistd.h>
#include <stdlib.h>
#include <sys/utsname.h>
#include <sys/param.h>
#include <cstring>


namespace Poco {


EnvironmentImpl::StringMap EnvironmentImpl::_map;
FastMutex EnvironmentImpl::_mutex;


std::string EnvironmentImpl::getImpl(const std::string& name)
{
        FastMutex::ScopedLock lock(_mutex);
        
        const char* val = getenv(name.c_str());
        if (val)
                return std::string(val);
        else
                throw NotFoundException(name);
}


bool EnvironmentImpl::hasImpl(const std::string& name)
{
        FastMutex::ScopedLock lock(_mutex);

        return getenv(name.c_str()) != 0;
}


void EnvironmentImpl::setImpl(const std::string& name, const std::string& value)
{
        FastMutex::ScopedLock lock(_mutex);
        
        std::string var = name;
        var.append("=");
        var.append(value);
        _map[name] = var;
        if (putenv((char*) _map[name].c_str()))
        {
                std::string msg = "cannot set environment variable: ";
                msg.append(name);
                throw SystemException(msg);
        }
}


std::string EnvironmentImpl::osNameImpl()
{
        struct utsname uts;
        uname(&uts);
        return uts.sysname;
}


std::string EnvironmentImpl::osVersionImpl()
{
        struct utsname uts;
        uname(&uts);
        return uts.release;
}


std::string EnvironmentImpl::osArchitectureImpl()
{
        struct utsname uts;
        uname(&uts);
        return uts.machine;
}


std::string EnvironmentImpl::nodeNameImpl()
{
        struct utsname uts;
        uname(&uts);
        return uts.nodename;
}


} // namespace Poco


//
// nodeIdImpl
//
#if defined(POCO_OS_FAMILY_BSD) || POCO_OS == POCO_OS_QNX
//
// BSD variants
//
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if_dl.h>


namespace Poco {


void EnvironmentImpl::nodeIdImpl(NodeId& id)
{
        struct ifaddrs* ifaphead;
        int rc = getifaddrs(&ifaphead);
        if (rc) throw SystemException("cannot get network adapter list");

        bool foundAdapter = false;
        for (struct ifaddrs* ifap = ifaphead; ifap; ifap = ifap->ifa_next) 
        {
                if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_LINK) 
                {
                        struct sockaddr_dl* sdl = reinterpret_cast<struct sockaddr_dl*>(ifap->ifa_addr);
                        caddr_t ap = (caddr_t) (sdl->sdl_data + sdl->sdl_nlen);
                        int alen = sdl->sdl_alen;
                        if (ap && alen > 0) 
                        {
                                std::memcpy(&id, ap, sizeof(id));
                                foundAdapter = true;
                                break;
                        }
                }
        }
        freeifaddrs(ifaphead);
        if (!foundAdapter) throw SystemException("cannot determine MAC address (no suitable network adapter found)");
}


} // namespace Poco


#elif defined(__CYGWIN__) || POCO_OS == POCO_OS_LINUX
//
// Linux, Cygwin
//
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <unistd.h>


namespace Poco {


void EnvironmentImpl::nodeIdImpl(NodeId& id)
{
        struct ifreq ifr;

        int s = socket(PF_INET, SOCK_DGRAM, 0);
        if (s == -1) throw SystemException("cannot open socket");

        std::strcpy(ifr.ifr_name, "eth0");
        int rc = ioctl(s, SIOCGIFHWADDR, &ifr);
        close(s);
        if (rc < 0) throw SystemException("cannot get MAC address");
        struct sockaddr* sa = reinterpret_cast<struct sockaddr*>(&ifr.ifr_addr);
        std::memcpy(&id, sa->sa_data, sizeof(id));
}


} // namespace Poco


#elif defined(POCO_OS_FAMILY_UNIX)
//
// General Unix
//
#include <sys/ioctl.h>
#if defined(sun) || defined(__sun)
#include <sys/sockio.h>
#endif
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <unistd.h>


namespace Poco {


void EnvironmentImpl::nodeIdImpl(NodeId& id)
{
        char name[MAXHOSTNAMELEN];
        if (gethostname(name, sizeof(name)))
                throw SystemException("cannot get host name");

        struct hostent* pHost = gethostbyname(name);
        if (!pHost) throw SystemException("cannot get host IP address");

        int s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
        if (s == -1) throw SystemException("cannot open socket");

        struct arpreq ar;
        std::memset(&ar, 0, sizeof(ar));
        struct sockaddr_in* pAddr = reinterpret_cast<struct sockaddr_in*>(&ar.arp_pa);
        pAddr->sin_family = AF_INET;
        std::memcpy(&pAddr->sin_addr, *pHost->h_addr_list, sizeof(struct in_addr));
        int rc = ioctl(s, SIOCGARP, &ar);
        close(s);
        if (rc < 0) throw SystemException("cannot get MAC address");
        std::memcpy(&id, ar.arp_ha.sa_data, sizeof(id));
}


} // namespace Poco


#endif