iniziamo esercizio database archiovio.txt

11.client-server-exam-database/daytimecli.c

@@ -0,0 +1,106 @@
+#include    "../basic.h"
+#include    <unistd.h>
+
+void sigpipeaction (int signal){
+    
+	int status, pid;
+    
+    fprintf(stderr, "Sigpipe catturato\n");
+    
+    
+}
+
+
+int main(int argc, char **argv) {
+    
+    
+    
+    struct sigaction sigpipestructure;
+    sigpipestructure.sa_handler = sigpipeaction;
+    sigpipestructure.sa_flags = 0;
+    
+    sigaction (SIGPIPE, &sigpipestructure, NULL);
+    
+    
+    
+    siginterrupt (SIGPIPE,1);
+    
+    
+    
+    
+	int			sockfd;
+	struct sockaddr_in	servaddr;
+
+	if (argc != 3){
+		printf("usage: daytimecli <indirizzoIP> <porta> \n");
+		exit(0);
+}
+        if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
+			printf("socket error\n");
+			exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family = AF_INET;
+        servaddr.sin_port = htons(atoi(argv[2])); /* server port */ 
+
+        if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
+                printf("inet_pton error for %s\n", argv[1]);
+		exit(0);
+}
+	if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
+		printf("connect error\n");
+		exit(0);
+	}
+	
+	struct sockaddr_in	r_server_local_addr;
+	unsigned int r_server_local_addr_len = sizeof(r_server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (r_server_local_addr_len) ;
+	int ridden;
+	int written;
+
+
+	sleep(5);
+    
+    int i;
+    for ( i = 0; i < 5; i ++){
+        
+	ridden = read (sockfd, socket_buffer,r_server_local_addr_len );
+	if (ridden < 0){
+		fprintf(stdout,"Errore durante la lettura\n");
+		exit(-1);
+	} else {
+		fprintf(stdout,"Ho letto  %d bytes\n",ridden);
+	}
+    }
+    
+    for ( i = 0; i < 1; i ++){
+        
+	written = write (sockfd, socket_buffer,r_server_local_addr_len /2  );
+	if (written < 0){
+		fprintf(stdout,"Errore durante la scrittura\n");
+		exit(-1);
+	} else {
+		fprintf(stdout,"Ho scritto  %d bytes\n",written);
+	}
+    }
+    
+
+  
+
+	
+	memcpy (&r_server_local_addr,socket_buffer, r_server_local_addr_len);
+	
+	
+	char buff[INET_ADDRSTRLEN];
+	short port;
+	
+	inet_ntop(AF_INET, &(r_server_local_addr.sin_addr), buff, INET_ADDRSTRLEN);// get ip
+	port = ntohs(r_server_local_addr.sin_port);// get  port
+		
+	fprintf (stdout,"%s%c%hu\n",buff,':',port);
+	
+	
+	
+	exit(0);
+}