add and virtualitemreceiver sources and modified for autoconf build system

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-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program 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 General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.

@@ -3,11 +3,14 @@ LIBS = $(INTLLIBS)
 
 PROGS = gameserver
 
-INCLUDES = -I../include 
+# INCLUDES = -I./include 
 
 bin_PROGRAMS = $(PROGS)
 
-gameserver_SOURCES = gameserver.c
+gameserver_SOURCES = gameserver.c clientClose.c clientRead.c \
+	daemonize.c handleCmdLine.c logRotate.c monitor.c \
+	serverInit.c serverRun.c serverShutdown.c signalHandling.c \
+	socket.c writeBuffer.c
 
 # install: install-am
 # 	strip -x $(DESTDIR)$(libdir)/libscot.so.0.0.2

+#include <stdlib.h>     /* for free() */
+#include <unistd.h>     /* for close() */
+#include <sys/socket.h> /* for shutdown() */
+#include <string.h>     /* for memset and stuff */
+
+#include "include/appConfig.h"
+#include "include/client.h"
+#include "include/monitor.h"
+
+void clientClose(tClient * client)
+{
+    if (0 != verbose) {
+        syslog(LOG_INFO, "closing socket for %s", client->remoteAddr);
+    }
+
+    /* close socket an remove from fd_set */
+    shutdown(client->socket, SHUT_RDWR);
+    close(client->socket);
+
+    /* free buffer */
+    free(client->buffer);
+    client->buffer  = NULL;
+    client->socket  = 0;
+    client->readPos = 0;
+    client->bufMult = 0;
+    memset(client->remoteAddr, 0, 16);
+}

+#include <unistd.h>     /* for getopt */
+#include <stdlib.h>     /* for exit */
+#include <string.h>     /* for memset and stuff */
+#include <errno.h>      /* for errno */
+
+#include "include/client.h"
+#include "include/monitor.h"
+
+#define GET_MULTIPLIER(size)    (((size) - 1) / READBUFSIZE + 1)
+int
+_clientReallocBuffer(tClient * client, unsigned int newSize)
+{
+    unsigned int newMult = GET_MULTIPLIER(newSize);
+
+    if (CLIENTMULTMAX < newMult) {
+        /* line exceeds maximum line length */
+
+        return 0;
+    }
+
+    if (client->bufMult < newMult) {
+
+        char * newBuffer = calloc(newMult * READBUFSIZE, sizeof(char));
+
+        if (NULL == newBuffer) {
+
+            syslogMonitor(LOG_ERR, MON_CRITICAL, "calloc",
+                    "calloc for readbuffer[%s] failed",
+                    client->remoteAddr);
+
+            syslogMonitor(LOG_ERR, MON_FAILURE, "calloc",
+                    "calloc for readbuffer[%s] failed - service terminated",
+                    client->remoteAddr);
+
+            exit(EXIT_FAILURE);
+        }
+
+        if (NULL != client->buffer) {
+            memcpy(newBuffer, client->buffer, client->readPos);
+            free(client->buffer);
+        }
+
+        client->buffer  = newBuffer;
+        client->bufMult = newMult;
+    }
+
+    return newMult;
+}
+
+int clientRead(tClient * client)
+{
+    int  readSize;
+    char readBuf[READBUFSIZE];
+
+    /*
+     * initialize values // read data from socket
+     */
+    memset(readBuf, 0, READBUFSIZE);
+    readSize = read(client->socket, readBuf, READBUFSIZE);
+
+    switch (readSize) {
+        case -1:
+            syslogMonitor(LOG_WARNING, MON_WARNING, "socket.read",
+                    "read returns -1 for client[%s]: %s - connection closed",
+                    client->remoteAddr, strerror(errno));
+            break;
+
+        case 0:
+            break;
+
+        default:
+            if (!_clientReallocBuffer(client, client->readPos + readSize)) {
+
+                syslogMonitor(LOG_WARNING, MON_WARNING, "data.longline",
+                        "got to long line from client[%s] - connection closed",
+                        client->remoteAddr);
+
+                return READ_ERR_LONGLINE;
+            }
+
+            memcpy(client->buffer+client->readPos, readBuf, readSize);
+            client->readPos += readSize;
+            break;
+    }
+
+    return readSize;
+}

+#include <stdio.h>      /* for printf() and fprintf() */
+#include <unistd.h>     /* for getopt */
+#include <stdlib.h>
+
+
+void daemonize(void) {
+    pid_t pid;
+
+    if (0 > ((pid = fork()))) {
+        perror("deamoinze[fork]");
+        exit(EXIT_FAILURE);
+    } else if (0 != pid) {
+        exit(EXIT_SUCCESS);
+    }
+
+    /* make new child session leader */
+    setsid();
+
+    /* connect all standard streams to /dev/null */
+    freopen("/dev/null", "w", stderr);
+    freopen("/dev/null", "r", stdin);
+    freopen("/dev/null", "w", stdout);
+}

-/***************************************************************************
- *
- * gameserver.c: This is a gameserver....more to come
- *
- * Copyright (C) 2009 Georg Steffers <georg@steffers.org>
- * This file is part of gameserver
- *
- * gameserver is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * Author:   Georg Steffers (gst), georg@steffers.org
- *
- * Version:  0.0
- * Created:  16.08.2009 18:52:57
- * Revision: none
- *
- ***************************************************************************/
-
-
-/* ####   HEADER FILE INCLUDES   ######################################### */
-#include	<stdio.h>
-#include	<stdlib.h>
-
-/* ####   MACROS  -  LOCAL TO THIS SOURCE FILE   ######################### */
-
-/* ####   TYPE DEFINITIONS  -  LOCAL TO THIS SOURCE FILE   ############### */
-
-/* ####   DATA TYPES  -  LOCAL TO THIS SOURCE FILE   ##################### */
-
-/* ####   VARIABLES  -  LOCAL TO THIS SOURCE FILE   ###################### */
-
-/* ####   PROTOTYPES  -  LOCAL TO THIS SOURCE FILE   ##################### */
-
-/* ####   FUNCTION DEFINITIONS  -  EXPORTED FUNCTIONS   ################## */
-
-/* ####   FUNCTION DEFINITIONS  -  LOCAL TO THIS SOURCE FILE   ########### */
+#include <string.h>     /* for memset and stuff */
+#include <syslog.h>     /* for logging */
+
+#include "include/server.h"
+#include "include/monitor.h"
+#include "include/signalHandling.h"
+#include "include/appConfig.h"
+#include "include/daemonize.h"
+
+/* some global configurations */
+/* TODO: make this whole stuff work without these globals */
+unsigned char verbose;
+unsigned char doGzip;
+
 
 int
-main ( int argc, char *argv[] )
+main(int argc, char *argv[])
 {
-	printf ( "Hello World\n" );
-
-	return EXIT_SUCCESS;
-}  /* ----------  end of function main  ---------- */
+    tVirtualItemServer server;
+
+    tAppConfig appConfig = {
+        0,             // no verbose
+        0,             // no daemon
+        0,             // no gzip
+        MAXPENDING,
+        DEFAULTPORT,
+        DEFAULTPATH,
+        LOGNAMEPATTERN
+    };
+
+    memset(&server, 0, sizeof(server));
+
+    handleCmdLine(&appConfig, argc, argv);
+    verbose = appConfig.verbose;
+    doGzip  = appConfig.doGzip;
+
+    /* decouple procss from controlling shell and make it session leader */
+    if (appConfig.doDaemon) {
+        daemonize();
+    }
+    init_signals();
+    openlog(argv[0], LOG_PID, LOG_USER);
+
+    syslogMonitor(LOG_INFO, MON_INFO, "startup", "service started");
+
+    serverInit(
+            &server,
+            appConfig.port,
+            appConfig.maxPending,
+            appConfig.logPath,
+            appConfig.namePat);
+    serverRun(&server);
+    serverShutdown(&server);
+
+    return 0;
+}

+#include <unistd.h>     /* for getopt */
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "include/appConfig.h"
+
+int
+handleCmdLine(tAppConfig * config, int argc, char *argv[])
+{
+    int opt;
+
+    while ((opt = getopt(argc, argv, "Dvgp:l:n:b:")) != -1) {
+        switch (opt) {
+            case 'p':
+                /* port */
+                config->port = atoi(optarg);
+                break;
+
+            case 'l':
+                /* logPath */
+                strncpy(config->logPath, optarg, sizeof(config->logPath)-1);
+                break;
+
+            case 'n':
+                /* logNamePattern */
+                strncpy(config->namePat, optarg, sizeof(config->namePat)-1);
+                break;
+
+            case 'b':
+                /* maxPending (connection backlog) */
+                config->maxPending = atoi(optarg);
+                break;
+
+            case 'v':
+                /* verbose */
+                config->verbose = 1;
+                break;
+
+            case 'g':
+                /* do gzip of data */
+                config->doGzip = 1;
+                break;
+
+            case 'D':
+                /* verbose */
+                config->doDaemon = 1;
+                break;
+
+            default:
+                /* '?' */
+                fprintf(
+                        stderr,
+                        "Usage: %s [-p port] [-l logPath] [-n logNamePattern] [-c maxClient] [-b backlog] [-v] [-D]\n"
+                        "Defaults:\n"
+                        "\t%-20s: port this service will use [%d]\n"
+                        "\t%-20s: path where the logfiles will be stored [%s/]\n"
+                        "\t%-20s: patten used by strftime to create the log filename [%s]\n"
+                        "\t%-20s: maximum connection backlog [%d]\n"
+                        "\t%-20s: be more verbose in syslog [off]\n"
+                        "\t%-20s: deamonize me\n",
+                        argv[0],
+                        "-p port", DEFAULTPORT,
+                        "-l logPath", DEFAULTPATH,
+                        "-n logNamePattern", LOGNAMEPATTERN,
+                        "-b backlog", MAXPENDING,
+                        "-v",
+                        "-D");
+                exit(EXIT_FAILURE);
+        }
+    }
+
+    return 0;
+}

+#ifndef __APP_CONFIG_H__
+#define __APP_CONFIG_H__
+
+#define MAXPENDING     10    /* Maximum outstanding connection requests */
+#define MAXCLIENTS     1000  /* Maximum connection handled in paralell */
+#define READBUFSIZE    2048  /* Size of receive buffer */
+#define DEFAULTPORT    8801  /* default port for service */
+#define DEFAULTPATH    "logfiles"
+#define LOGNAMEPATTERN "log-%Y-%m-%d_%Hh"
+
+typedef struct {
+    unsigned char verbose;
+    unsigned char doDaemon;
+    unsigned char doGzip;
+    unsigned int  maxPending;
+    unsigned int  port;
+    char          logPath[513];
+    char          namePat[513];
+} tAppConfig;
+
+extern unsigned char verbose;
+extern unsigned char doGzip;
+
+int
+handleCmdLine(tAppConfig * config, int argc, char *argv[]);
+
+#endif // __APP_CONFIG_H__

+#ifndef __CLIENT_H__
+#define __CLIENT_H__
+
+#include <stdio.h> /* for FILE */
+
+#define READBUFSIZE    2048   /* Size of receive buffer */
+#define CLIENTMULTMAX  512U   /* 1MB maximum size the readbuffer may grow */
+
+#define WRITE_ERR_IO        -1
+#define WRITE_ERR_NOPRINT   -2
+
+#define READ_ERR_LONGLINE   -2
+
+typedef struct {
+    int          socket;
+    char *       buffer;
+    unsigned int readPos;
+    unsigned int bufMult;
+    char         remoteAddr[16];
+} tClient;
+
+
+void clientClose(tClient *);
+int  clientRead(tClient *);
+int  writeRemaining(tClient *, FILE *);
+int  writeBuffer(tClient *, FILE *);
+
+#endif // __CLIENT_H__

+#ifndef __DAEMONIZE_H__
+#define __DAEMONIZE_H__
+
+void daemonize(void);
+
+#endif // __DAEMONIZE_H__

+#ifndef __MONITOR_H__
+#define __MONITOR_H__
+
+#include <syslog.h>     /* for logging */
+
+#define MON_INFO     0
+#define MON_WARNING  1
+#define MON_CRITICAL 2
+#define MON_FAILURE  3
+
+int monitor(unsigned int sev, const char * pattern, const char * message);
+int syslogMonitor (unsigned int logLvl, unsigned int sev, const char *pattern, const char * message, ...) __attribute__ ((format (printf, 4, 5)));
+
+#endif /* __MONITOR_H__ */

+#ifndef __SERVER_H__
+#define __SERVER_H__
+
+#include <stdio.h>      /* for printf() and fprintf() */
+#include <sys/select.h> /* for select system call and related */
+
+#include "client.h"
+
+typedef struct {
+    int            servSock;
+    tClient        clients[FD_SETSIZE];
+    unsigned int   maxFd;
+    fd_set         socks;
+    char           logPath[512];
+    char           namePat[512];
+    FILE         * wHandle;
+} tVirtualItemServer;
+
+
+void serverClose(tVirtualItemServer *);
+void serverShutdown(tVirtualItemServer *);
+void serverInit(
+        tVirtualItemServer *,
+        unsigned int,
+        unsigned int,
+        const char *,
+        const char *);
+void serverRun(tVirtualItemServer *);
+void logRotate(tVirtualItemServer *);
+
+#endif // __SERVER_H__

+#ifndef __SIGNAL_HANDLING_H__
+#define __SIGNAL_HANDLING_H__
+
+extern volatile int doShutdown;
+
+void terminate(int signum);
+void init_signals(void);
+
+#endif // __SIGNAL_HANDLING_H__
+

+#ifndef __SOCKET_H__
+#define __SOCKET_H__
+
+#include <arpa/inet.h>  /* for in_port_t */
+
+int initServerSocket(in_port_t port, int backlog);
+int acceptConnection(int servSock, char remoteAddr[16]);
+
+#endif /* __SOCKET_H__ */

+#include <sys/select.h> /* for select system call and related */
+#include <time.h>
+#include <unistd.h>     /* for fork and exec */
+#include <sys/types.h>
+#include <sys/wait.h>   /* for wait */
+#include <stdio.h>      /* fopen and stuff */
+#include <stdlib.h>     /* exit */
+#include <string.h>     /* strncpy, memcpy, etc. */
+#include <syslog.h>
+#include <errno.h>
+
+#include "include/appConfig.h"
+#include "include/monitor.h"
+#include "include/server.h"
+
+
+void
+_gzip(tVirtualItemServer * server, const char * logName)
+{
+    pid_t gzipPid = fork();
+
+    switch(gzipPid) {
+        pid_t tmpPid;
+
+        case 0:
+            /* first close everything in child */
+            serverClose(server);
+
+            // We don't care about finishing of child, so decouple it
+            // by using a second child that stop immediatly
+            tmpPid = fork();
+            if (0 == tmpPid) {
+                syslog(LOG_INFO, "gzip: %s", logName);
+                // if (-1 == execl("/bin/gzip", "/bin/gzip", "-9", logName, (char *) 0)) {
+                if (-1 == execl("/bin/gzip", "/bin/gzip", logName, (char *) 0)) {
+                    syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.gzip",
+                            "execl failed for gzip %s: %s", logName, strerror(errno));
+                }
+            }
+            exit(EXIT_SUCCESS);
+
+        case -1:
+            syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.fork",
+                    "fork failed for gzip %s: %s", logName, strerror(errno));
+            break;
+
+        default:
+            wait(NULL);
+            break;
+    }
+}
+
+
+void
+logRotate(tVirtualItemServer * server)
+{
+    static char logName[1024]     = "";
+
+    char        strftimeName[128] = "";
+    char        newLogName[1024]  = "";
+
+    time_t      t;
+    struct tm   *tmp;
+
+    t   = time(NULL);
+    tmp = localtime(&t);
+    if (tmp == NULL) {
+        syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.localtime",
+                "can't get localtime for new logname. continue with old one");
+        return;
+    }
+
+    if (strftime(
+                strftimeName,
+                sizeof(strftimeName)-1,
+                server->namePat,
+                tmp) == 0)
+    {
+        syslogMonitor(LOG_ERR, MON_WARNING, "logrotate.strftime", 
+                "strftime returned 0 for new logname. continue with old one");
+        return;
+    }
+
+    snprintf(
+            newLogName,
+            sizeof(newLogName)-1,
+            "%s/%s",
+            server->logPath,
+            strftimeName);
+
+    if (0 != strncmp(logName, newLogName, sizeof(logName)-1)) {
+        if (0 != verbose) {
+            syslog(LOG_INFO, "actual logfile name: %s", logName);
+            syslog(LOG_INFO, "new logfile name: %s", newLogName);
+        }
+
+        if (NULL != server->wHandle) {
+            fclose(server->wHandle);
+            server->wHandle = NULL;
+
+            if (doGzip) {
+                _gzip(server, logName);
+            }
+        }
+
+        strncpy(logName, newLogName, sizeof(logName)-1);
+        server->wHandle = fopen(logName, "w");
+    }
+}

+#include <stdlib.h>    /* for system() */
+#include <sys/wait.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdarg.h>    /* for ellipse handling */
+
+#include "include/signalHandling.h"
+#include "include/monitor.h"
+
+
+#define MONITORCMD    "/usr/bin/monitor"
+#define MONITORTYPE   "app"
+#define MONITORNAME   "virtualitem.logreceiver"
+
+const char severity[][10] = {
+    "info",
+    "warning",
+    "critical",
+    "failure"
+};
+
+
+int
+monitor(
+        unsigned int   sev,
+        const char   * pattern,
+        const char   * message
+) {
+    char monCall[1024];
+    int  ret;
+
+    snprintf(monCall, 1023,
+            "%s %s %s.%s.%s \"%s\"", 
+            MONITORCMD,
+            severity[sev],
+            MONITORTYPE,
+            MONITORNAME,
+            pattern,
+            message);
+
+    ret = system(monCall);
+
+    if (WIFSIGNALED(ret)) {
+        switch (WTERMSIG(ret)) {
+            case SIGINT:
+            case SIGQUIT:
+                syslog(LOG_INFO, "interrupted in monitor call");
+                doShutdown=1;
+        }
+    }
+
+    if (-1 == ret || 0 != WEXITSTATUS(ret)) {
+        syslog(LOG_ERR, "call monitoring failed: %s", strerror(errno));
+    }
+
+    return ret;
+}
+
+/* this handles simple %d and %s replacements,
+ * complexer stuff must be prepared via snprintf
+ * the complete message should not extend 1024
+ * Bytes, else it will be truncated silently */
+int
+syslogMonitor(
+        unsigned int   logLvl,
+        unsigned int   sev,
+        const char   * pattern,
+        const char   * message,
+        ...
+) {
+    va_list args;
+    char    buffer[1025];
+    int     maxBuf    = sizeof(buffer)/sizeof(buffer[0]);
+
+    memset(buffer, 0, maxBuf);
+
+    va_start(args, message);
+    vsnprintf(buffer, 1024, message, args);
+    va_end(args);
+
+    syslog(logLvl, "%s", buffer);
+    monitor(sev, pattern, buffer);
+
+    return 0;
+}

+# Sed script that remove the POT-Creation-Date line in the header entry
+# from a POT file.
+#
+# The distinction between the first and the following occurrences of the
+# pattern is achieved by looking at the hold space.
+/^"POT-Creation-Date: .*"$/{
+x
+# Test if the hold space is empty.
+s/P/P/
+ta
+# Yes it was empty. First occurrence. Remove the line.
+g
+d
+bb
+:a
+# The hold space was nonempty. Following occurrences. Do nothing.
+x
+:b
+}

+#include <sys/select.h> /* for select system call and related */
+#include <string.h>     /* for memset and stuff */
+#include <stdlib.h>     /* for getopt */
+
+#include "include/server.h"
+#include "include/socket.h"
+#include "include/monitor.h"
+
+void
+serverInit(
+        tVirtualItemServer * server,
+        unsigned int         port,
+        unsigned int         pending,
+        const char         * logPath,
+        const char         * namePat)
+{
+    FD_ZERO(&(server->socks));
+
+    server->servSock = initServerSocket(port, pending);
+    server->maxFd    = server->servSock;
+    FD_SET(server->servSock, &(server->socks));
+
+    strncpy(server->logPath, logPath, sizeof(server->logPath)-1);
+    strncpy(server->namePat, namePat, sizeof(server->namePat)-1);
+
+    memset(server->clients, 0, sizeof(server->clients));
+
+    /*
+     * try to open file (firstrun)
+     */
+    if (NULL == server->wHandle) {
+        logRotate(server);
+        if (NULL == server->wHandle) {
+            syslogMonitor(LOG_ERR, MON_CRITICAL, "logfile.rotate",
+                    "no valid handle for logfile");
+
+            syslogMonitor(LOG_ERR, MON_FAILURE, "logfile.rotate",
+                    "no valid handle for logfile - service terminated");
+
+            exit(EXIT_FAILURE);
+        }
+    }
+}

+#include <sys/select.h> /* for select system call and related */
+#include <string.h>     /* for memset and stuff */
+#include <stdlib.h>     /* for exit */
+#include <errno.h>      /* for errno */
+
+#include "include/server.h"
+#include "include/socket.h"
+#include "include/monitor.h"
+#include "include/signalHandling.h"
+
+#undef  MAX
+#define MAX(x,y) ((x) > (y) ? (x) : (y))
+
+void
+serverRun(tVirtualItemServer * server)
+{
+    syslogMonitor(LOG_INFO, MON_INFO, "startup", "service started");
+
+    while (!doShutdown) /* until error or signal  */
+    {
+        fd_set rfds;
+        int    i;
+
+        memcpy(&rfds, &(server->socks), sizeof(fd_set));
+
+        /*
+         * wait for handles to become ready
+         */
+        if (-1 == select((server->maxFd)+1, &rfds, NULL, NULL, NULL))
+        {
+            switch (errno) {
+                default:
+                case EBADF:
+                case EINVAL:
+                case ENOMEM:
+                     doShutdown = 1;
+                     /* Fallthrough */
+
+                case EINTR:
+                     syslogMonitor(LOG_ERR, MON_CRITICAL, "select",
+                                   "select systemcall failed: [%s]",
+                                   strerror(errno));
+                     syslogMonitor(LOG_ERR, MON_FAILURE, "select",
+                                   "select systemcall failed: [%s] - service terminated",
+                                   strerror(errno));
+                     continue; /* in while loop above */
+            }
+        }
+
+        /*
+         * update file to actual time
+         */
+        logRotate(server);
+        if (NULL == server->wHandle) {
+            syslogMonitor(LOG_ERR, MON_CRITICAL, "logfile.rotate",
+                          "no valid handle for logfile - service terminated");
+            exit(EXIT_FAILURE);
+        }
+
+        /*
+         * handle accept
+         */
+        if (FD_ISSET(server->servSock, &rfds)) {
+            int  fd;
+            char remoteAddr[16] = "";
+
+            if (-1 != (fd = acceptConnection(server->servSock, remoteAddr))) {
+                (server->clients)[fd].socket = fd;  // save the socket handle
+                                                    // within the client struct
+                                                    //
+                strncpy(
+                        (server->clients)[fd].remoteAddr,
+                        remoteAddr,
+                        sizeof((server->clients)[fd].remoteAddr)-1);
+                FD_SET(fd, &(server->socks));
+                server->maxFd = MAX(fd, server->maxFd);
+            }
+
+            FD_CLR(server->servSock, &rfds);
+        }
+
+        /* handle reads */
+        for (i=3; i<=server->maxFd; i++) {
+            if (FD_ISSET(i, &rfds)) {
+                switch (clientRead(&((server->clients)[i]))) {
+                    case 0:
+                        /*
+                         * normal close: write remaining data
+                         */
+                        writeRemaining(
+                                    &((server->clients)[i]),
+                                    server->wHandle);
+                        /* FALLTHROUGH */
+
+                    case -1: 
+                        /*
+                         * read failure / close connection
+                         * FALLTHROUGH
+                         */
+
+                    case READ_ERR_LONGLINE:
+                        /*
+                         * detected very long line read from client
+                         * message is already given now terminate connection
+                         * FALLTHROUG
+                         */
+                        clientClose(&((server->clients)[i]));
+                        FD_CLR(i, &(server->socks));
+                        break;
+
+                    default:
+                        if (0 > writeBuffer(
+                                    &((server->clients)[i]),
+                                    server->wHandle))
+                        {
+                            /*
+                             * got IO Error or binary data
+                             * the message is already monitored in client code
+                             */
+                            clientClose(&((server->clients)[i]));
+                            FD_CLR(i, &(server->socks));
+                        }
+                        break;
+                }
+            }
+        }
+    }
+}

+#include <stdio.h>      /* for printf() and fprintf() */
+#include <sys/select.h> /* for select system call and related */
+#include <sys/socket.h> /* for select system call and related */
+#include <stdlib.h>     /* for exit */
+#include <string.h>     /* for memset and stuff */
+#include <unistd.h>     /* for getopt */
+#include <errno.h>      /* for errno */
+
+#include "include/appConfig.h"
+#include "include/server.h"
+#include "include/monitor.h"
+
+
+void
+serverClose(tVirtualItemServer * server)
+{
+    int i;
+
+    for (i=3; i<=server->maxFd; i++) {
+        if (FD_ISSET(i, &(server->socks))) {
+            if (i == server->servSock) {
+                close(server->servSock);
+            } else {
+                close(((server->clients)[i]).socket);
+                free(((server->clients)[i]).buffer);
+                FD_CLR(i, &(server->socks));
+            }
+        }
+    }
+
+    if (NULL != server->wHandle) {
+        fclose(server->wHandle);
+    }
+}
+
+void
+serverShutdown(tVirtualItemServer * server)
+{
+    int i;
+
+    for (i=3; i<=server->maxFd; i++) {
+        if (FD_ISSET(i, &(server->socks))) {
+            if (i == server->servSock) {
+                shutdown(server->servSock, SHUT_RDWR);
+                close(server->servSock);
+            } else {
+                writeBuffer(&(server->clients[i]), server->wHandle);
+                clientClose(&((server->clients)[i]));
+                FD_CLR(i, &(server->socks));
+            }
+        }
+    }
+
+    if (NULL != server->wHandle) {
+        fclose(server->wHandle);
+    }
+}

+#include <signal.h>     /* for signal() and signal names */
+
+#include "include/monitor.h"
+
+volatile int doShutdown;
+
+void terminate(int signum)
+{
+    signal(signum, SIG_IGN);
+    syslogMonitor(LOG_INFO, MON_CRITICAL, "signals",
+                  "caugth deadly signal %d", signum);
+    syslogMonitor(LOG_INFO, MON_FAILURE, "signals",
+                  "caugth deadly signal %d - service terminated", signum);
+    doShutdown = 1;
+}
+
+void init_signals(void)
+{
+    signal(SIGTERM, terminate);
+    signal(SIGHUP, SIG_IGN);
+    signal(SIGINT, terminate);
+    signal(SIGQUIT, terminate);
+    signal(SIGABRT, terminate);
+    signal(SIGALRM, SIG_IGN);
+    signal(SIGURG, SIG_IGN);
+
+    signal(SIGPIPE, SIG_IGN);
+}

+#include <stdio.h>      /* for printf() and fprintf() */
+#include <sys/types.h>  /* SO_REUSEADDR */
+#include <sys/socket.h> /* for socket(), bind(), and connect() */
+#include <arpa/inet.h>  /* for sockaddr_in and inet_ntoa() */
+#include <stdlib.h>     /* for atoi() and exit() */
+#include <string.h>     /* for memset() */
+#include <unistd.h>     /* for close() */
+#include <errno.h>      /* for errno */
+#include <syslog.h>
+
+#include "include/appConfig.h"
+#include "include/monitor.h"
+
+
+int
+initServerSocket(in_port_t port, int backlog)
+{
+    int                sock;     /* socket descriptor for server */
+    struct sockaddr_in addr;     /* Local address */
+
+    int                reUse = 1;  /* TODO: make this configurable */
+
+    /* Create socket for incoming connections */
+    if (-1 == (sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))) {
+        syslogMonitor(LOG_ERR, MON_CRITICAL, "server.socket",
+                "error opening socket: %s",
+                strerror(errno));
+        syslogMonitor(LOG_ERR, MON_FAILURE, "server.socket",
+                "error opening socket: %s - service terminated",
+                strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+
+    /* Make the socket REUSE a TIME_WAT socket */
+    setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reUse, sizeof (reUse));
+
+    /* Construct local address structure */
+    memset(&addr, 0, sizeof(addr));       /* Zero out structure */
+
+    addr.sin_family      = AF_INET;           /* Internet address family */
+    addr.sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
+    addr.sin_port        = htons(port);       /* Local port */
+
+    /* Bind to the local address */
+    if (-1 == bind(sock, (struct sockaddr *) &addr, sizeof(addr))) {
+        syslogMonitor(LOG_ERR, MON_CRITICAL, "server.bind",
+                "error binding socket: %s",
+                strerror(errno));
+        syslogMonitor(LOG_ERR, MON_FAILURE, "server.bind",
+                "error binding socket: %s - service terminated",
+                strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+
+    /* Mark the socket so it will listen for incoming connections */
+    if (-1 == listen(sock, backlog)) {
+        syslogMonitor(LOG_ERR, MON_CRITICAL, "server.listen",
+                "error binding socket: %s - service terminated",
+                strerror(errno));
+        syslogMonitor(LOG_ERR, MON_FAILURE, "server.listen",
+                "error binding socket: %s - service terminated",
+                strerror(errno));
+        exit(EXIT_FAILURE);
+    }
+
+    return sock;
+}
+
+int
+acceptConnection(int servSock, char remoteAddr[16])
+{
+    int                sock;   /* Socket descriptor for client */
+    struct sockaddr_in addr;   /* Client address */
+    unsigned int       len;    /* Length of client address data structure */
+
+    /* Set the size of the in-out parameter */
+    len = sizeof(addr);
+
+    /* Wait for a client to connect */
+    if (-1 == (sock = accept(servSock, (struct sockaddr *) &addr, &len))) {
+        syslogMonitor(LOG_ERR, MON_WARNING, "server.accept", 
+                "error acception connection: %s", strerror(errno));
+    } else {
+        strncpy (remoteAddr, inet_ntoa(addr.sin_addr), sizeof(remoteAddr)-1);
+    }
+
+    /* clntSock is connected to a client! */
+    if (0 != verbose) {
+        syslog(LOG_INFO, "handling client %s\n", inet_ntoa(addr.sin_addr));
+    }
+
+    return sock;
+}

+#include <stdio.h>      /* for ferror() */
+#include <string.h>     /* for memset and stuff */
+#include <errno.h>      /* for errno */
+#include <ctype.h>      /* for isprint */
+
+#include "include/client.h"
+#include "include/monitor.h"
+
+int
+_handleIoError(FILE * wHandle)
+{
+    if (ferror(wHandle)) {
+        switch (errno) {
+            case EIO:
+                /* FALLTHROUGHT */
+
+            case ENOSPC:
+                syslogMonitor(LOG_ERR, MON_CRITICAL, "io.fatal",
+                        "fatal IO error [%s]",
+                        strerror(errno));
+
+                syslogMonitor(LOG_ERR, MON_FAILURE, "io.fatal",
+                        "fatal IO error [%s] - service terminated",
+                        strerror(errno));
+
+                break;
+        }
+
+        return 1;
+    }
+
+    return 0;
+}
+
+int
+_isPrintableBuffer(const char * buffer, size_t size, char * found)
+{
+    while (isprint(*(buffer++)) && 1 < size--);
+
+    if (0 == size) {
+        return 1;
+    } else {
+        *found = *(buffer-1);
+        return 0;
+    }
+}
+
+int
+_doWrite(tClient * client, size_t size, FILE * wHandle)
+{
+    char found = '\0';
+
+    if (NULL != client->buffer) {
+
+        if (!_isPrintableBuffer(client->buffer, size, &found)) {
+            syslogMonitor(LOG_ERR, MON_WARNING, "data.binary",
+                    "got non printable character[0x%02x] from client[%s] - connection closed",
+                    found,
+                    client->remoteAddr);
+
+            return WRITE_ERR_NOPRINT;
+        }
+
+        /* write remaining stuff to file */
+        fwrite(client->buffer, size, 1, wHandle);
+        if (_handleIoError(wHandle)) {
+            return WRITE_ERR_IO;
+        }
+
+        fputc('\n', wHandle);
+        if (_handleIoError(wHandle)) {
+            return WRITE_ERR_IO;
+        }
+
+        fflush(wHandle);
+        if (_handleIoError(wHandle)) {
+            return WRITE_ERR_IO;
+        }
+
+        return size + 1;
+
+    } else {
+
+        return 0;
+
+    }
+}
+
+/*
+ * write all data that remains in buffer, even if its not terminated by
+ * a newline. Anyway ignore trailing newlines.
+ */
+int
+writeRemaining(tClient * client, FILE * wHandle)
+{
+    int written = writeBuffer(client, wHandle);
+
+    if (0 < client->readPos) {
+        unsigned int wLen = client->readPos;
+
+        /* ignore trailing newlines */
+        while (0 < client->readPos && '\n' == client->buffer[wLen]) {
+            wLen--;
+        }
+
+        written += _doWrite(client, wLen, wHandle);
+    }
+
+    memset(client->buffer, 0, client->readPos);
+    client->readPos = 0;
+
+    return written;
+}
+
+/*
+ * write buffer till last newline is reached.
+ * If no newline is in buffer, nothing is written.
+ */
+int
+writeBuffer(tClient * client, FILE * wHandle)
+{
+    char * nlpos   = memchr(client->buffer, '\n', client->readPos);
+    int    written = 0;
+
+    while (NULL != nlpos) {
+        unsigned int moveSize, clearSize;
+        char *       actAddr;
+
+        if (nlpos > client->buffer) {
+            unsigned int wLen  = nlpos - client->buffer;
+            int          wTemp = _doWrite(client, wLen, wHandle);
+
+            if (0 > wTemp) {
+                return wTemp;
+            }
+
+            written += wTemp;
+        }
+
+        actAddr    = client->buffer + client->readPos;
+        moveSize   = actAddr - nlpos - 1;
+        clearSize  = actAddr - client->buffer - moveSize;
+
+        memmove(client->buffer, nlpos+1, moveSize);
+        memset(client->buffer + moveSize, 0, clearSize);
+
+        client->readPos = moveSize;
+
+        nlpos = memchr(client->buffer, '\n', client->readPos);
+    }
+
+    return written;
+}