From: Simone Piccardi <piccardi@gnulinux.it>
Date: Thu, 21 Apr 2011 23:58:50 +0000 (+0000)
Subject: piccola correzione.
X-Git-Url: https://gapil.gnulinux.it/gitweb/?a=commitdiff_plain;h=a59f46f457248921d34ba7175697a129469d6d90;p=gapil.git

piccola correzione.
---

diff --git a/fileadv.tex b/fileadv.tex
index 312c36f..c38a396 100644
--- a/fileadv.tex
+++ b/fileadv.tex
@@ -2199,8 +2199,8 @@ periodicità di ripetizione, per farlo su usa la funzione omologa di
 \func{timerfd\_settime}; il suo prototipo è:
 \begin{prototype}{sys/timerfd.h} 
   {int timerfd\_settime(int fd, int flags,
-                           const struct itimerspec *new_value,
-                           struct itimerspec *old_value)}
+                           const struct itimerspec *new\_value,
+                           struct itimerspec *old\_value)}
 
   Crea un timer associato ad un file descriptor per la notifica. 
 
diff --git a/sources/test_signalfd.c b/sources/test_signalfd.c
new file mode 100644
index 0000000..628bd4d
--- /dev/null
+++ b/sources/test_signalfd.c
@@ -0,0 +1,151 @@
+/* test_signalfd.c
+ * 
+ * Copyright (C) 2011 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 test_signalfd.c: 
+ * Program to test signalfd behaviour on fd close
+ *
+ * Author: Simone Piccardi
+ * Jan. 2011
+ *
+ * Usage: test_signalfd -h give all info's
+ *
+ ****************************************************************/
+/* 
+ * Include needed headers
+ */
+#define _GNU_SOURCE
+#include <errno.h>       /* error definitions and routines */ 
+#include <stdlib.h>      /* C standard library */
+#include <unistd.h>      /* unix standard library */
+#include <stdio.h>	 /* standard I/O library */
+#include <string.h>      /* C strings library */
+#include <signal.h>	 /* signal constants, types and functions */
+#include <sys/signalfd.h>/* Linux signalfd interface */
+#include <time.h>
+
+#include "macros.h"
+#include "Gapil.h"
+
+/* Subroutines declaration */
+void usage(void);
+void die(char *);
+void HandSIGINT(int signo);
+
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int i, nomask, testwrite, sigfd;
+    time_t t;
+    struct signalfd_siginfo siginf;
+    sigset_t sigmask;
+    char buffer[] = "test write";
+   /*
+     * Input section: decode command line parameters 
+     * Use getopt function
+     */
+    opterr = 0;	 /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "hnw")) != -1) {
+	switch (i) {
+	/* 
+	 * Handling options 
+	 */ 
+	case 'h':   /* help option */
+	    printf("Wrong -h option use\n");
+	    usage();
+	    return -1;
+	    break;
+	case 'n':   /* no mask option */
+	    nomask = 1;
+	    break;
+	case 'w':   /* no mask option */
+	    testwrite = 1;
+	    break;
+	case '?':   /* unrecognized options */
+	    printf("Unrecognized options -%c\n",optopt);
+	    usage();
+	default:    /* should not reached */
+	    usage();
+	}
+    }
+    /* ***********************************************************
+     * 
+     *		 Options processing completed
+     *
+     *		      Main code beginning
+     * 
+     * ***********************************************************/
+    Signal(SIGINT, HandSIGINT);
+    if (nomask != 1) {
+	sigemptyset(&sigmask);
+	sigaddset(&sigmask, SIGINT);
+	if (sigprocmask(SIG_BLOCK, &sigmask, NULL) == -1)   // block signals
+	    die("Failing in singal masking");
+    }
+    if ((sigfd=signalfd(-1, &sigmask, SFD_NONBLOCK)) == -1) // take a signalfd
+	die("Failing in signalfd");
+    printf("Signalfd armed\n");
+    if (testwrite) {
+	if (write(sigfd, buffer, sizeof(buffer)))
+	    perror("write on signal fd error");
+	else printf("write successfully\n");	    
+    }
+    /* raise signal */
+    if (raise(SIGINT) != 0)
+	die("Failing in sending SIGINT");
+    t = time(NULL);
+    printf("Lanciato SIGINT, %s\n", ctime(&t));
+    sleep(2);
+    close(sigfd);
+    if (sigprocmask(SIG_UNBLOCK, &sigmask, NULL) == -1)   // block signals
+	die("Failing in signal unmasking");
+    sleep(10);
+    printf("ERROR:SHOULD BE END IN THE SIGNAL HANDLER\n");
+    return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+    printf("Program testsignalfd : test signalfd on close \n");
+    printf("Usage:\n");
+    printf("  testfopen [-h] file mode \n");
+    printf("  -h	   print this help\n");
+    
+    exit(1);
+}
+/*
+ * Print error message and exit routine
+ */
+void die(char * mess) {
+    perror(mess);
+    exit(-1);
+}
+/*
+ * Signal Handler to manage termination
+ */
+void HandSIGINT(int signo) {
+    time_t t;
+    debug("Terminated by %s\n", strsignal(signo));
+    t = time(NULL);
+    printf("Handler executed %s\n", ctime(&t));
+    exit(0);
+}