I need to apologize, my sample code made things more confusing.
In unix the code I posted would have raised an error because
newsockfs=accept()...would not block and just pass through. The idea
is you can loop through accept() and multiplex multiple inputs.
but in plan9/ape it works just as how you shown regardless of the
fcntl non-block command. so I will not be able to loop through several
sockets because it would block.
On Tue, Jan 11, 2011 at 2:11 PM, Federico G. Benavento
<benave...@gmail.com> wrote:
> isn't this the intended behavior?
>
> lotte% 8.out 777
> NON BLOCK Succeeded
> Here is the message: hola
>
> from a different window:
>
> lotte% telnet tcp!localhost!777
> connected to tcp!localhost!777 on /net/tcp/20
> hola
> I got your messagelotte%
>
> On Mon, Jan 10, 2011 at 10:31 PM, Fernan Bolando
> <fernanbola...@mailc.net> wrote:
>> 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;
>> }
>>
>>
>
>
>
> --
> Federico G. Benavento
>
