+++ /dev/null
-/* MQFortuneServer.c
- *
- * Copyright (C) 2002 Simone Piccardi
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-/****************************************************************
- *
- * Program fortuned
- * Fortune server - Using Message Queues
- *
- * Author: Simone Piccardi
- * Aug. 2002
- *
- * Usage: fortuned -h give all info
- *
- * $Id: MQFortuneServer.c,v 1.4 2003/01/12 16:10:07 piccardi Exp $
- *
- ****************************************************************/
-/*
- * Include needed headers
- */
-#include <sys/types.h> /* predefined types */
-#include <sys/stat.h> /* */
-#include <unistd.h> /* include unix standard library */
-#include <stdio.h> /* include standard I/O library */
-#include <stdlib.h> /* standard library */
-#include <string.h> /* ANSI C standard string */
-#include <errno.h> /* errorstring */
-#include <signal.h> /* signals */
-#include <sys/ipc.h>
-#include <sys/msg.h>
-
-#include "macros.h"
-#include "Gapil.h"
-
-/* Maximum message size */
-#define MSGMAX 8192
-
-/* Subroutines declaration */
-void usage(void);
-void HandSIGTERM(int signo);
-int FortuneParse(char *file, char **fortune, int n);
-
-int msgid; /* Message queue identifier */
-int main(int argc, char *argv[])
-{
-/* Variables definition */
- int i, n = 0;
- char **fortune; /* array of fortune message string */
- char *fortunefilename = "/usr/share/games/fortunes/linux"; /* file name */
- struct msgbuf_read { /* message struct to read request from clients */
- long mtype; /* message type, must be 1 */
- long pid; /* message data, must be the pid of the client */
- } msg_read;
- struct msgbuf_write { /* message struct to write result to clients */
- long mtype; /* message type, will be the pid of the client*/
- char mtext[MSGMAX]; /* message data, will be the fortune */
- } msg_write;
- key_t key; /* Message queue key */
- int size; /* message size */
- /*
- * Input section: decode parameters passed in the calling
- * Use getopt function
- */
- opterr = 0; /* don't want writing to stderr */
- while ( (i = getopt(argc, argv, "hn:f:")) != -1) {
- switch (i) {
- /*
- * Handling options
- */
- case 'h': /* print usage infos */
- usage();
- return(0);
- break;
- case 'f': /* set fortune file name */
- fortunefilename = optarg;
- break;
- case 'n': /* set number of fortune string to use */
- n = strtol(optarg, NULL, 10);
- fortune = (char **) calloc(sizeof(*fortune), n);
- break;
- case '?': /* unrecognized options */
- printf("Unrecognized options -%c\n", optopt);
- usage();
- default: /* should not reached */
- usage();
- }
- }
- /* ***********************************************************
- *
- * Options processing completed
- *
- * Main code beginning
- *
- * ***********************************************************/
- if (n==0) usage(); /* if no pool depth exit printing usage info */
- Signal(SIGTERM, HandSIGTERM); /* set handlers for termination */
- Signal(SIGINT, HandSIGTERM);
- Signal(SIGQUIT, HandSIGTERM);
- i = FortuneParse(fortunefilename, fortune, n); /* parse phrases */
- for (n=0; n<i; n++) debug("%s%%\n", fortune[n]);
- /*
- * Comunication section
- */
- key = ftok("./MQFortuneServer.c", 1);
- msgid = msgget(key, IPC_CREAT|0666);
- if (msgid < 0) {
- perror("Cannot create message queue");
- exit(1);
- }
-
- /* Main body: loop over requests */
- daemon(0, 0);
- while (1) {
- msgrcv(msgid, &msg_read, sizeof(int), 1, MSG_NOERROR);
- debug("received request from %d\n", msg_read.pid);
- n = random() % i; /* select random value */
- strncpy(msg_write.mtext, fortune[n], MSGMAX);
- size = min(strlen(fortune[n])+1, MSGMAX);
- msg_write.mtype=msg_read.pid; /* use request pid as type */
- msgsnd(msgid, &msg_write, size, 0);
- }
- debug("Exiting for unknown reasons\n");
-}
-/*
- * routine to print usage info and exit
- */
-void usage(void) {
- printf("Elementary fortune server\n");
- printf("Usage:\n");
- printf(" fortuned [-h] [-f] -n XXX \n");
- printf(" -h print this help\n");
- printf(" -f filename set file for fortunes\n");
- printf(" -n NNN set pool depth\n");
- exit(1);
-}
-/*
- * Signal Handler to manage termination
- */
-void HandSIGTERM(int signo) {
- debug("Terminated by %s\n", strsignal(signo));
- msgctl(msgid, IPC_RMID, NULL); /* remove message queue */
- exit(0);
-}
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