tdeprintcheck.cpp

/*
 *  This file is part of the KDE libraries
 *  Copyright (c) 2001 Michael Goffioul <tdeprint@swing.be>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License version 2 as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 **/
 
/*
 * Implementation of simple checking mechanism. Rules are defined in
 * the form of an URI. Available syntax is:
 *  - exec:/<execname>  ->  check for an executable in
 *                  $PATH variable.
 *  - config:/path/to/file  ->      check for the existence of a file
 *                  or directory in KDE or standard
 *                  UNIX config locations
 *  - file:/path/to/file
 *  - dir:/path/to/dir  ->  simply check the existence of the
 *                  a file or directory
 *  - service:/serv     ->  try to connect to a port on the
 *                  specified host (usually localhost)
 *                  "serv" can be a port value or service name
 *
 * TO BE IMPLEMENTED:
 *  - run:/<execname>   ->  check for a running executable
 */
 
#include "tdeprintcheck.h"
 
#include <kstandarddirs.h>
#include <kdebug.h>
#include <kextsock.h>
#include <tqfile.h>
#include <unistd.h>
 
static const char* const config_stddirs[] = {
    "/etc/",
    "/usr/etc/",
    "/usr/local/etc/",
    "/opt/etc/",
    "/opt/local/etc/",
    0
};
 
bool KdeprintChecker::check(TDEConfig *conf, const TQString& group)
{
    if (!group.isEmpty())
        conf->setGroup(group);
    TQStringList    uris = conf->readListEntry("Require");
    return check(uris);
}
 
bool KdeprintChecker::check(const TQStringList& uris)
{
    bool    state(true);
    for (TQStringList::ConstIterator it=uris.begin(); it!=uris.end() && state; ++it)
    {
        state = (state && checkURL(KURL(*it)));
        // kdDebug( 500 ) << "auto-detection uri=" << *it << ", state=" << state << endl;
    }
    return state;
}
 
bool KdeprintChecker::checkURL(const KURL& url)
{
    TQString    prot(url.protocol());
    if (prot == "config")
        return checkConfig(url);
    else if (prot == "exec")
        return checkExec(url);
    else if (prot == "file" || prot == "dir")
        return TDEStandardDirs::exists(url.url());
    else if (prot == "service")
        return checkService(url);
    return false;
}
 
bool KdeprintChecker::checkConfig(const KURL& url)
{
    // get the config filename (may contain a path)
    TQString    f(url.path().mid(1));
    bool    state(false);
 
    // first check for standard KDE config file
    if (!locate("config",f).isEmpty())
        state = true;
    else
    // otherwise check in standard UNIX config directories
    {
        const char* const *p = config_stddirs;
        while (*p)
        {
            // kdDebug( 500 ) << "checkConfig() with " << TQString::fromLatin1( *p ) + f << endl;
            if ( TQFile::exists( TQString::fromLatin1( *p ) + f ) )
            {
                state = true;
                break;
            }
            else
                p++;
        }
    }
    return state;
}
 
bool KdeprintChecker::checkExec(const KURL& url)
{
    TQString    execname(url.path().mid(1));
    return !(TDEStandardDirs::findExe(execname).isEmpty());
}
 
bool KdeprintChecker::checkService(const KURL& url)
{
    TQString    serv(url.path().mid(1));
    KExtendedSocket sock;
 
    bool    ok;
    int port = serv.toInt(&ok);
 
    if (ok) sock.setAddress("localhost", port);
    else sock.setAddress("localhost", serv);
    return (sock.connect() == 0);
}