HI,
Hi,
i made server program in c on linux, accepting portno as argument, and i made client program on same architecture accepting hostname & portno as arguments, but when i run client on same machime in which i ran server, it is giving error " Segmentation fault".
why????????????
We need code to help you.
Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.
- Mike McShaffry
Since my crystal ball is also segfaulting at the moment, I guess you'll have to post some code if you want anything like a specific answer rather than some general waffle about "have you tried x, y, z, blah blah blah"
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Well, before posting your code, compiling it with -g option and run in gdb may be a good practice
Now i m writing key lines that clears program purpose, & i think u can make out some points from below lines: Client.c
struct sockaddr_in serv_addr ;
struct hostent *server ;
char buffer[256] = " " ;
portno = atoi( argv[2] ) ;
sockfd = socket( AF_INET, SOCK_STREAM, 0 ) ;
server = gethostbyname( argv[1] ) ;
serv_addr.sin_family = AF_INET ;
bcopy( (char*)server->h_addr, (char*)serv_addr.sin_addr.s_addr, server->h_length ) ;
serv_addr.sin_port = htons( portno ) ;
if( connect( sockfd, ( struct sockaddr*)&serv_addr, sizeof( serv_addr )) < 0 )
error( "ERROR connecting" ) ;
fgets( buffer, 255, stdin ) ;
n = write( sockfd, buffer, strlen( buffer )) ;
n = read( sockfd, buffer, 255 ) ;
I m using gcc compiler on RHEL 2.6 kernel.
Similarly i written server.c
run:
on one terminal, ./server <portno>
on other terminal, ./client <hostname> <portno>
on client side, i m getting "Segmentation Fault"
Why?????????????????/
code tags ftw.
Read the previous messages and then post a new one! You can use GDB to locate the line where you get the error...
Allocate memory before using bcopy(). Something like below will work...
And, use "code" tagsCode:serv_addr.sin_addr.s_addr=malloc(sizeof(unsigned long));
