bind函数

#include <sys/socket.h>
#include <sys/un.h>
#include <stdlib.h>
#include <stdlio.h>

#define MY_SOCK_PATH "/somepath"

int
main(int argc, char *argv[])
{
int sfd;
struct sockaddr_un addr;
　//创建通信的套接字
sfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (sfd == -1) {
perror("socket");
exit(EXIT_FAILURE);
}
　//初始化addr变量
memset(&addr, 0, sizeof(struct sockaddr_un));
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, MY_SOCK_PATH,
sizeof(addr.sun_path) - 1);
　//将端口信息与套接字绑定
if (bind(sfd, (struct sockaddr *) &addr, sizeof
(struct sockaddr_un)) == -1) {
perror("bind");
exit(EXIT_FAILURE);
}
…
}