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 /****************************************************************
24 * Author: Simone Piccardi
27 * Usage: fortuned -h give all info
29 * $Id: FortuneServer.c,v 1.2 2002/08/18 14:38:04 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 <fcntl.h> /* */
46 /* Subroutines declaration */
48 int FortuneParse(char *file, char **fortune, int n);
50 int main(int argc, char *argv[])
52 /* Variables definition */
54 char *fortunefilename = "/usr/share/games/fortunes/kids";
55 char *fifoname = "/tmp/fortune.fifo";
58 int fifo_server, fifo_client;
61 * Input section: decode parameters passed in the calling
64 opterr = 0; /* don't want writing to stderr */
65 while ( (i = getopt(argc, argv, "hn:f:")) != -1) {
71 printf("Wrong -h option use\n");
76 fortunefilename = optarg;
79 n = strtol(optarg, NULL, 10);
80 fortune = (char **) calloc(sizeof(*fortune), n);
82 case '?': /* unrecognized options */
83 printf("Unrecognized options -%c\n",optopt);
85 default: /* should not reached */
89 /* ***********************************************************
91 * Options processing completed
95 * ***********************************************************/
96 if (n==0) usage(); /* if no pool depth exit printing usage info */
97 i = FortuneParse(fortunefilename, fortune, n); /* parse phrases */
98 for (n=0; n<i; n++) debug("%s\n\n", fortune[n]);
100 * Comunication section
102 if (mkfifo(fifoname, 0622)) { /* create well known fifo if does't exist */
104 perror("Cannot create well known fifo");
108 /* Main body: loop over requests */
110 fifo_server = open(fifoname, O_RDONLY); /* open well known fifo */
111 if (fifo_server < 0) {
112 perror("Cannot open well known fifo");
115 nread = read(fifo_server, line, 79); /* read request */
117 debug("%s %d\n", line,nread);
118 n = random() % i; /* select random value */
119 debug("fortune[%d]=%s\n", n, fortune[n]);
120 fifo_client = open(line, O_WRONLY); /* open client fifo */
121 nread = write(fifo_client, /* write phrase */
122 fortune[n], strlen(fortune[n])+1);
123 close(fifo_client); /* close well known fifo */
124 close(fifo_server); /* close client fifo */
128 * routine to print usage info and exit
131 printf("Elementary fortune server\n");
133 printf(" fortuned [-h] [-f] -n XXX \n");
134 printf(" -h print this help\n");
135 printf(" -f filename set file for fortunes\n");
136 printf(" -n XXX set pool depth\n");