我正在编写一个 IRC 客户端,我想实现一个“/server”命令来将我的客户端的连接切换到另一个服务器。在初始化新连接之前,我想关闭 sockect 的 fd,但 close() 调用失败。谁能告诉我为什么?这是我的代码:
/* Main execution loop */
FD_ZERO(&irc->rdfs);
FD_SET(STDIN_FILENO, &irc->rdfs);
FD_SET(irc->socket_fd, &irc->rdfs);
if ((select(irc->socket_fd + 1, &irc->rdfs, NULL, NULL, NULL)) == -1)
{
if ((close(irc->socket_fd)) == -1)
exit(usage(CLOSE_ERROR));
exit(usage(SELECT_ERROR));
}
if (FD_ISSET(STDIN_FILENO, &irc->rdfs))
{
fgets(irc->buffer, SIZE - 1, stdin);
{
p = strstr(irc->buffer, RET);
if (p != NULL)
*p = 0;
else
irc->buffer[SIZE - 1] = 0;
}
write_on_server(irc, irc->buffer); /* The function where I call switch_server() in */
}
else if (FD_ISSET(irc->socket_fd, &irc->rdfs))
{
if ((read_on_server(irc)) == 0)
exit(usage(SERVER_DISCONNECT));
puts(irc->buffer);
}
这是我试图关闭套接字的 fd 的地方:
void switch_server(t_irc *irc)
{
if ((close(irc->socket_fd)) == -1) /* This is the close which fail */
exit(EXIT_FAILURE);
}
void write_on_server(t_irc *irc, const char * buffer)
{
if (!(strncmp("/server", buffer, strlen("/server"))))
switch_server(irc);
else
if ((send(irc->socket_fd, buffer, strlen(buffer), 0)) < 0)
{
if ((close(irc->socket_fd)) == -1)
exit(usage(CLOSE_ERROR));
exit(usage(CLIENT_SEND_ERROR));
}
}
非常感谢。