3 * Copyright (C) 2002 Simone Piccardi
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /****************************************************************
22 * Fortune server - Using Messag queues
24 * Author: Simone Piccardi
27 * Usage: fortuned -h give all info
29 * $Id: MQFortuneServer.c,v 1.1 2002/08/26 21:11:49 piccardi Exp $
31 ****************************************************************/
33 * Include needed headers
35 #include <sys/types.h> /* predefined types */
36 #include <sys/stat.h> /* */
37 #include <unistd.h> /* include unix standard library */
38 #include <stdio.h> /* include standard I/O library */
39 #include <stdlib.h> /* standard library */
40 #include <string.h> /* ANSI C standard string */
41 #include <errno.h> /* errorstring */
42 #include <signal.h> /* signals */
43 #include <fcntl.h> /* */
48 /* Subroutines declaration */
50 void HandSIGTERM(int signo);
51 int FortuneParse(char *file, char **fortune, int n);
53 /* name of well known fifo */
54 int main(int argc, char *argv[])
56 /* Variables definition */
60 long mtype; /* message type, must be > 0 */
61 int pid; /* message data */
64 long mtype; /* message type, must be > 0 */
65 char mtext[MSGMAX]; /* message data */
71 * Input section: decode parameters passed in the calling
74 opterr = 0; /* don't want writing to stderr */
75 while ( (i = getopt(argc, argv, "hn:f:")) != -1) {
81 printf("Wrong -h option use\n");
86 fortunefilename = optarg;
89 n = strtol(optarg, NULL, 10);
90 fortune = (char **) calloc(sizeof(*fortune), n);
92 case '?': /* unrecognized options */
93 printf("Unrecognized options -%c\n",optopt);
95 default: /* should not reached */
99 /* ***********************************************************
101 * Options processing completed
103 * Main code beginning
105 * ***********************************************************/
106 if (n==0) usage(); /* if no pool depth exit printing usage info */
107 Signal(SIGTERM, HandSIGTERM); /* set handlers for termination */
108 Signal(SIGINT, HandSIGTERM);
109 Signal(SIGQUIT, HandSIGTERM);
110 i = FortuneParse(fortunefilename, fortune, n); /* parse phrases */
111 for (n=0; n<i; n++) debug("%s%%\n", fortune[n]);
113 * Comunication section
115 key = ftok("./MQFortuneServer.c", 1);
116 msgid = msgget(key, IPC_CREAT|666);
118 /* Main body: loop over requests */
120 msgrcv(msgid, &msg_read, 1, sizeof(int), MSG_NOERROR);
121 n = random() % i; /* select random value */
122 strncpy(msgbuf_write.mtext, fortune[n], MSGMAX);
123 size = min(strlen(fortune[n])+1, MSGMAX);
124 msgsnd(msgid, &msg_write, size, 0);
126 debug("Exiting for unknown reasons\n");
129 * routine to print usage info and exit
132 printf("Elementary fortune server\n");
134 printf(" fortuned [-h] [-f] -n XXX \n");
135 printf(" -h print this help\n");
136 printf(" -f filename set file for fortunes\n");
137 printf(" -n XXX set pool depth\n");
141 * Signal Handler to manage termination
143 void HandSIGTERM(int signo) {
144 debug("Terminated by %s\n", strsignal(signo));