X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2FFortuneServer.c;h=4cb65cac20e3fea98cff688b0b0e5e9ab0f3ce86;hp=c00b3fedf5a80ca33d6de56dbb3652bd97b8132c;hb=fa15a3f1ecd64efd8440e46d398fd9976abc3d25;hpb=198add70c8604fe7ffb05689aa693d782102917e

diff --git a/sources/FortuneServer.c b/sources/FortuneServer.c
index c00b3fe..4cb65ca 100644
--- a/sources/FortuneServer.c
+++ b/sources/FortuneServer.c
@@ -26,34 +26,35 @@
  *
  * Usage: fortuned -h give all info
  *
- * $Id: FortuneServer.c,v 1.1 2002/08/18 10:34:10 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 <fcntl.h>	 /*  */
+#include <sys/types.h>   /* primitive system data types */
+#include <sys/stat.h>    /* file characteristics constants and functions */
+#include <unistd.h>      /* unix standard library */
+#include <stdio.h>       /* standard I/O library */
+#include <stdlib.h>	 /* C standard library */
+#include <string.h>	 /* C strings library */
+#include <errno.h>	 /* error definitions and routines */
+#include <signal.h>	 /* signal constants, types and functions */
+#include <fcntl.h>	 /* file control functions */
 
 #include "macros.h"
+#include "Gapil.h"
 
 /* Subroutines declaration */
 void usage(void);
+void HandSIGTERM(int signo);
 int FortuneParse(char *file, char **fortune, int n);
 
+/* name of well known fifo */
+char *fifoname = "/tmp/fortune.fifo";
 int main(int argc, char *argv[])
 {
 /* Variables definition */
-    int n = 0;
-    FILE *fortunefile;
-    char *fortunefilename = "/usr/share/misc/fortune/fortune.it";
-    char *fifoname = "/tmp/fortune.fifo";
+    int i, n = 0;
+    char *fortunefilename = "/usr/share/games/fortunes/linux";
     char **fortune;
     char line[80];
     int fifo_server, fifo_client;
@@ -62,8 +63,7 @@ int main(int argc, char *argv[])
      * Input section: decode parameters passed in the calling 
      * Use getopt function
      */
-    int i;
-    opterr = 0;	 /* don't want writing to stderr */
+    opterr = 0;	                             /* don't want writing to stderr */
     while ( (i = getopt(argc, argv, "hn:f:")) != -1) {
 	switch (i) {
 	/* 
@@ -81,10 +81,10 @@ int main(int argc, char *argv[])
 	    n = strtol(optarg, NULL, 10);
 	    fortune = (char **) calloc(sizeof(*fortune), n);
 	    break;
-	case '?':   /* unrecognized options */
+	case '?':                                    /* unrecognized options */
 	    printf("Unrecognized options -%c\n",optopt);
 	    usage();
-	default:    /* should not reached */
+	default:                                       /* should not reached */
 	    usage();
 	}
     }
@@ -95,36 +95,54 @@ int main(int argc, char *argv[])
      *		      Main code beginning
      * 
      * ***********************************************************/
-    if (n==0) {                                   /* if no pool depth exit */
-	usage();                                       /* print usage info */
-    }
-    i = FortuneParse(fortunefilename, fortune, n);
-    for (n=0; n<i; n++) debug("%s", fortune[n]);
+    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 
      */
-    if (mkfifo(fifoname, 0622)) {
+    if (mkfifo(fifoname, 0622)) {  /* create well known fifo if does't exist */
 	if (errno!=EEXIST) {
 	    perror("Cannot create well known fifo");
-	    exit(-1);
+	    exit(1);
 	}
     }
+    daemon(0, 0);
+    /* open fifo two times to avoid EOF */
+    fifo_server = open(fifoname, O_RDONLY);
+    if (fifo_server < 0) {
+	perror("Cannot open read only well known fifo");
+	exit(1);
+    }
+    if (open(fifoname, O_WRONLY) < 0) {
+	perror("Cannot open write only well known fifo");
+	exit(1);
+    }
+    /* Main body: loop over requests */
     while (1) {
-	fifo_server = open(fifoname, O_RDONLY);
-	if (fifo_server < 0) {
-	    perror("Cannot open well known fifo");
-	    exit(-1);
+	nread = read(fifo_server, line, 79);                 /* read request */
+	if (nread < 0) {
+	    perror("Read Error");
+	    exit(1);
 	}
-	nread = read(fifo_server, line, 79);
-	line[nread] = 0;
+	line[nread] = 0;                       /* terminate fifo name string */
 	debug("%s %d\n", line,nread);
-	n = random() % i;
+	n = random() % i;                             /* select random value */
 	debug("fortune[%d]=%s\n", n, fortune[n]);
-	fifo_client = open(line, O_WRONLY);
-	nread = write(fifo_client, fortune[n], strlen(fortune[n])+1);
-	close(fifo_client);
-	close(fifo_server);
+	fifo_client = open(line, O_WRONLY);              /* open client fifo */
+	if (fifo_client < 0) {
+	    debug("Client fifo is %s\n", line);
+	    perror("Cannot open");
+	    exit(1);
+	}
+	nread = write(fifo_client,                           /* write phrase */
+		      fortune[n], strlen(fortune[n])+1);
+	close(fifo_client);                             /* close client fifo */
     }
+    debug("Exiting for unknown reasons\n");
 }
 /*
  * routine to print usage info and exit
@@ -138,3 +156,11 @@ void usage(void) {
     printf("  -n XXX        set pool depth\n");
     exit(1);
 }
+/*
+ * Signal Handler to manage termination
+ */
+void HandSIGTERM(int signo) {
+    debug("Terminated by %s\n", strsignal(signo));
+    unlink(fifoname);
+    exit(0);
+}