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Old 10-28-2013, 01:58 AM   #1
why_so_serious
LQ Newbie
 
Registered: Oct 2013
Posts: 26

Rep: Reputation: Disabled
C client socket program in Linux (segmentation fault)


Hi everyone, I wrote c client program in Linux. I got segmentation fault when I run that program. my program is
Code:
#include <sys/socket.h>
#include <sys/types/h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <uniistd.h>
#include <errno.h>
#include <arpa/net.h>

int main (void)
{
	int sockfd, n;
	struct sockaddr_in serv_addr;
	struct hostent *server;
	
	char buffer[256];
	char hostname[1024];
	gethostname(hostname, sizeof(hostname));
	serverINFO = gethostbyname(hostname);
	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockfd < 0)
	{
            printf("ERROR opening socket");
            return 1;
        }
	if(serverINFO == NULL)
	{
		printf("Problem interpreting host\n");
                return 1;
	}
        serv_addr.sin_family = serverINFO ->h_addrtype;
        memcpy((char *) &serv_addr.sin_addr, serverINFO ->h_addr_list[0], serverINFO->h_length);
	
	serv_addr.sin_port = htons (SERVERPORT);
	if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof (serv_addr)) < 0) 
	{
             printf("ERROR connecting");
             return 1;
        }
	printf("Please enter the message: ");
	bzero(buffer, 256);
	fgets(buffer,255,stdin);
	n = write(sockfd, buffer, strlen(buffer));
	if (n < 0)
	error ("ERROR writing to socket");
	bzero(buffer, 256);
	n = read (sockfd, buffer, 255);
	if (n < 0)
	error ("ERROR reading from socket");
	printf("here we are %s\n", buffer);
	close(sockfd);
}
 
Old 10-28-2013, 03:08 AM   #2
pan64
Senior Member
 
Registered: Mar 2012
Location: Hungary
Distribution: debian i686 (solaris)
Posts: 4,722

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how is it related to that post? http://www.linuxquestions.org/questi...am-4175482072/
Have you tried debugging?
Have you got warnings during compilation or build?
 
1 members found this post helpful.
Old 10-28-2013, 03:23 AM   #3
why_so_serious
LQ Newbie
 
Registered: Oct 2013
Posts: 26

Original Poster
Rep: Reputation: Disabled
Quote:
Originally Posted by pan64 View Post
how is it related to that post? http://www.linuxquestions.org/questi...am-4175482072/
Have you tried debugging?
Have you got warnings during compilation or build?
Hi, thanks for your ans. I had debugged and solved the problem. Thanks a lot
 
  


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