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Full Discussion: Bind system call
Top Forums Programming Bind system call Post 302899433 by VSSajjan on Tuesday 29th of April 2014 04:53:18 AM
Old 04-29-2014
Bind system call

We are calling the bind system call as below
Code:
bind(sfd, (struct sockaddr *) &addr, sizeof(struct sockaddr_un));

Why there is difference in third parameter getting the sizeof as "struct sockaddr_un", wherein the 2nd parametere we are passing it as "(struct sockaddr *)"?

Regards,
Sajjan

Last edited by VSSajjan; 04-29-2014 at 08:46 AM.. Reason: code tags
 

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un.h(3HEAD)                                                           Headers                                                          un.h(3HEAD)

NAME
un.h, un - definitions for UNIX-domain sockets SYNOPSIS
#include <sys/un.h> DESCRIPTION
The <sys/un.h> header defines the sockaddr_un structure that includes the following members: sa_family_t sun_family /* address family */ char sun_path[] /* socket pathname */ The sockaddr_un structure is used to store addresses for UNIX domain sockets. Values of this type must be cast to struct sockaddr for use with the socket interfaces. The <sys/un.h> header defines the type sa_family_t as described in socket.h(3HEAD). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
bind(3SOCKET), bind(3XNET), socket.h(3HEAD), socket(3SOCKET), socket(3XNET), socketpair(3SOCKET), socketpair(3XNET), attributes(5), stan- dards(5) SunOS 5.10 30 Aug 2002 un.h(3HEAD)
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