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sockets(examples): remove unused register keyword, replace bzero with memset #410

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sockets(examples): remove unused register keyword, replace bzero with memset #410

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24 changes: 10 additions & 14 deletions documentation/content/en/books/developers-handbook/sockets/_index.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -562,8 +562,7 @@ We now know enough to write a very simple client, one that will get current time
#include <unistd.h>

int main() {
register int s;
register int bytes;
int s, bytes;
struct sockaddr_in sa;
char buffer[BUFSIZ+1];

Expand All @@ -572,7 +571,7 @@ int main() {
return 1;
}

bzero(&sa, sizeof sa);
memset(&sa, '\0', sizeof(sa));

sa.sin_family = AF_INET;
sa.sin_port = htons(13);
Expand Down Expand Up @@ -718,8 +717,8 @@ The child calls `listen`, then starts an endless loop, which accepts a connectio
#define BACKLOG 4

int main() {
register int s, c;
int b;
int s, c;
socklen_t b;
struct sockaddr_in sa;
time_t t;
struct tm *tm;
Expand All @@ -730,7 +729,7 @@ int main() {
return 1;
}

bzero(&sa, sizeof sa);
memset(&sa, '\0', sizeof(sa));

sa.sin_family = AF_INET;
sa.sin_port = htons(13);
Expand All @@ -747,11 +746,9 @@ int main() {
case -1:
perror("fork");
return 3;
break;
default:
close(s);
return 0;
break;
case 0:
break;
}
Expand All @@ -773,7 +770,6 @@ int main() {

if ((t = time(NULL)) < 0) {
perror("daytimed time");

return 6;
}

Expand Down Expand Up @@ -976,14 +972,14 @@ This allows us to create a much more flexible-and much more useful-version of ou
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

int main(int argc, char *argv[]) {
register int s;
register int bytes;
int s, bytes;
struct sockaddr_in sa;
struct hostent *he;
char buf[BUFSIZ+1];
Expand All @@ -994,19 +990,19 @@ int main(int argc, char *argv[]) {
return 1;
}

bzero(&sa, sizeof sa);
memset(&sa, '\0', sizeof(sa));

sa.sin_family = AF_INET;
sa.sin_port = htons(13);

host = (argc > 1) ? (char *)argv[1] : "time.nist.gov";
host = (argc > 1) ? argv[1] : "time.nist.gov";

if ((he = gethostbyname(host)) == NULL) {
herror(host);
return 2;
}

bcopy(he->h_addr_list[0],&sa.sin_addr, he->h_length);
memcpy(&sa.sin_addr, he->h_addr_list[0], he->h_length);

if (connect(s, (struct sockaddr *)&sa, sizeof sa) < 0) {
perror("connect");
Expand Down
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