From: Fernan Bolando <fernanbolando@mailc.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: [9fans] ape/socket again non-blocking command succeeds but still blocks
Date: Tue, 11 Jan 2011 09:31:35 +0800 [thread overview]
Message-ID: <AANLkTinb8_RrP=_JYnBXsubq5SnvPt9TXTKNFQzcQsdE@mail.gmail.com> (raw)
Hi all
I am testing the non-block socket of ape/plan9 the code below seems to
succeed in making a non-block sockets on unix, but not in plan9/ape it
still blocks with no error from fcntl.
Is this intended?
/* A simple server in the internet domain using TCP
The port number is passed as an argument */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <fcntl.h>
void error(char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n, sta, fl;
if (argc < 2) {
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
printf("NON BLOCK Succeeded\n");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
error("ERROR on binding");
fl = fcntl (sockfd, F_GETFL,0);
sta = fcntl (sockfd, F_SETFL, fl | O_NONBLOCK); /* set
nonblock */
if (sta == -1)
{
printf(" NON_BLOCK FAILED\n");
return 1;
}
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd,
(struct sockaddr *) &cli_addr,
&clilen);
if (newsockfd < 0)
error("ERROR on accept");
bzero(buffer,256);
n = read(newsockfd,buffer,255);
if (n < 0) error("ERROR reading from socket");
printf("Here is the message: %s\n",buffer);
n = write(newsockfd,"I got your message",18);
if (n < 0) error("ERROR writing to socket");
return 0;
}
next reply other threads:[~2011-01-11 1:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-11 1:31 Fernan Bolando [this message]
2011-01-11 6:11 ` Federico G. Benavento
2011-01-11 6:53 ` Fernan Bolando
2011-01-11 7:45 ` Federico G. Benavento
2011-01-11 8:06 ` Fernan Bolando
2011-01-11 8:18 ` Fernan Bolando
2011-01-11 8:57 ` Federico G. Benavento
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