Socket Problem............

[Clement]

Please help me.......
I am getting blocked in bind() system call.......

i don't know why

can you please any one tell me why........
#include<stdio.h>
#include<sys/un.h>
#include<sys/types.h>
#include<sys/socket.h>
#define SOCK_PATH "mysock1"
void error(char *);
main()
{
printf("OK");
int sockfd,newsockfd,serverlen,clilen,n;
struct sockaddr_un cli_addr,serv_addr;
char buf[80];
printf("Ok");
if((sockfd=socket(AF_UNIX,SOCK_STREAM,0))<0)
perror("creating socket");
serv_addr.sun_family=AF_UNIX;
printf("OK");
unlink(SOCK_PATH);
strcpy(serv_addr.sun_path,SOCK_PATH);
if(bind(sockfd,(struct sockaddr
*)&serv_addr,sizeof(serv_addr))<0)
perror("binding socket");
listen(sockfd,1);
clilen=sizeof(cli_addr);
newsockfd=accept(sockfd,(struct sockaddr
*)&cli_addr,&clilen);
printf("Ok\n");
if(newsockfd<0)
error("accepting");
for(;;)
{
printf("Waiting for Client......\n");
read(newsockfd,buf,sizeof(buf));
printf("**CLIENT** :%s",buf);
if(strcmp("end\n",buf)==0)
{
printf("Disconnecting\n");
exit(0);
}
printf("**SERVER** :");
fgets(buf,sizeof(buf),stdin);
write(newsockfd,buf,sizeof(buf));
}
}
void error(char *msg)
{
perror(msg);
exit(0);
}

[santosh]

Clement wrote:

Please help me.......
I am getting blocked in bind() system call.......

i don't know why

can you please any one tell me why........

<snip>

Since bind() is not defined by ISO C, you should try a group specific to
your system, most likely <comp.unix.programmer>

[husterk]

On Oct 19, 2:12 pm, Clement <[e-mail]:

Please help me.......
I am getting blocked in bind() system call.......

i don't know why

can you please any one tell me why........

#include<stdio.h>
#include<sys/un.h>
#include<sys/types.h>
#include<sys/socket.h>
#define SOCK_PATH "mysock1"
void error(char *);
main()
{
printf("OK");
int sockfd,newsockfd,serverlen,clilen,n;
struct sockaddr_un cli_addr,serv_addr;
char buf[80];
printf("Ok");
if((sockfd=socket(AF_UNIX,SOCK_STREAM,0))<0)
perror("creating socket");
serv_addr.sun_family=AF_UNIX;
printf("OK");
unlink(SOCK_PATH);
strcpy(serv_addr.sun_path,SOCK_PATH);
if(bind(sockfd,(struct sockaddr
*)&serv_addr,sizeof(serv_addr))<0)
perror("binding socket");
listen(sockfd,1);
clilen=sizeof(cli_addr);
newsockfd=accept(sockfd,(struct sockaddr
*)&cli_addr,&clilen);
printf("Ok\n");
if(newsockfd<0)
error("accepting");
for(;;)
{
printf("Waiting for Client......\n");
read(newsockfd,buf,sizeof(buf));
printf("**CLIENT** :%s",buf);
if(strcmp("end\n",buf)==0)
{
printf("Disconnecting\n");
exit(0);
}
printf("**SERVER** :");
fgets(buf,sizeof(buf),stdin);
write(newsockfd,buf,sizeof(buf));
}}

void error(char *msg)
{
perror(msg);
exit(0);

}- Hide quoted text -

- Show quoted text -

Try configuring your socket for non-blocking (i.e. asynchronous)
operation prior to calling the bind function. This will allow you to
place a timeout on the bind() call which will return some type of
error code instead of just hanging your system. You can then review
this error code to determine what the problem is. Don't forget to
change the socket back to blocking.

Keith
http://www.doubleblackdesign.com

[CBFalconer]

Clement wrote:

>
I am getting blocked in bind() system call.......
i don't know why
can you please any one tell me why........

#include<stdio.h>
#include<sys/un.h>
#include<sys/types.h>
#include<sys/socket.h>

So far the only thing mentioned that exists in standard C is
<stdio.h>. Try a newsgroup that deals with your particular
system.

--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net>

--
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