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 1.3 2002/08/18 23:24:44 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 /* name of well known fifo */
51 char *fifoname = "/tmp/fortune.fifo";
52 int main(int argc, char *argv[])
54 /* Variables definition */
56 char *fortunefilename = "/usr/share/games/fortunes/kids";
59 int fifo_server, fifo_client;
62 * Input section: decode parameters passed in the calling
65 opterr = 0; /* don't want writing to stderr */
66 while ( (i = getopt(argc, argv, "hn:f:")) != -1) {
72 printf("Wrong -h option use\n");
77 fortunefilename = optarg;
80 n = strtol(optarg, NULL, 10);
81 fortune = (char **) calloc(sizeof(*fortune), n);
83 case '?': /* unrecognized options */
84 printf("Unrecognized options -%c\n",optopt);
86 default: /* should not reached */
90 /* ***********************************************************
92 * Options processing completed
96 * ***********************************************************/
97 Signal(SIGTERM, HandSIGTERM);
98 Signal(SIGINT, HandSIGTERM);
99 Signal(SIGQUIT, HandSIGTERM);
100 if (n==0) usage(); /* if no pool depth exit printing usage info */
101 i = FortuneParse(fortunefilename, fortune, n); /* parse phrases */
102 for (n=0; n<i; n++) debug("%s\n\n", fortune[n]);
104 * Comunication section
106 if (mkfifo(fifoname, 0622)) { /* create well known fifo if does't exist */
108 perror("Cannot create well known fifo");
112 /* Main body: loop over requests */
114 fifo_server = open(fifoname, O_RDONLY); /* open well known fifo */
115 if (fifo_server < 0) {
116 perror("Cannot open well known fifo");
119 nread = read(fifo_server, line, 79); /* read request */
121 debug("%s %d\n", line,nread);
122 n = random() % i; /* select random value */
123 debug("fortune[%d]=%s\n", n, fortune[n]);
124 fifo_client = open(line, O_WRONLY); /* open client fifo */
125 nread = write(fifo_client, /* write phrase */
126 fortune[n], strlen(fortune[n])+1);
127 close(fifo_client); /* close well known fifo */
128 close(fifo_server); /* close client fifo */
132 * routine to print usage info and exit
135 printf("Elementary fortune server\n");
137 printf(" fortuned [-h] [-f] -n XXX \n");
138 printf(" -h print this help\n");
139 printf(" -f filename set file for fortunes\n");
140 printf(" -n XXX set pool depth\n");
144 * Signal Handler to manage termination
146 void HandSIGTERM(int signo) {