Modifiche varie e ripulitura esempi. Trattata accept4.

[gapil.git] / listati / TCP_echod_first_init.c

diff --git a/listati/TCP_echod_first_init.c b/listati/TCP_echod_first_init.c
new file mode 100644 (file)
index 0000000..02e99ad
--- /dev/null
+++ b/listati/TCP_echod_first_init.c
@@ -0,0 +1,36 @@
+int main(int argc, char *argv[])
+{
+    int list_fd, conn_fd; 
+    pid_t pid;
+    struct sockaddr_in serv_add;
+    ...
+    /* create and init socket */
+    if ( (list_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+       perror("Socket creation error");
+       exit(1);
+    }
+    memset((void *)&serv_add, 0, sizeof(serv_add)); /* clear server address */
+    serv_add.sin_family = AF_INET;                  /* address type is INET */
+    serv_add.sin_port = htons(7);                   /* echo port is 7 */
+    serv_add.sin_addr.s_addr = htonl(INADDR_ANY);   /* connect from anywhere */
+    if (bind(list_fd, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) {
+       perror("bind error");
+       exit(1);
+    }
+    /* give away privileges and go daemon */
+    if (setgid(65534) !=0) { /* first give away group privileges */
+       perror("cannot give away group privileges");
+       exit(1);
+    }
+    if (setuid(65534) !=0) { /* and only after user ... */
+       perror("cannot give away user privileges");
+       exit(1);
+    }
+    if (demonize) {          /* go daemon */
+        openlog(argv[0], 0, LOG_DAEMON); /* open logging */
+       if (daemon(0, 0) != 0) {
+           perror("cannot start as daemon");
+           exit(1);
+       }
+    }
+    ...