#include <sys/fsext.h> int __FSEXT_alloc_fd(__FSEXT_Function *_function);
This function is part of the section File System Extensions. It is used
by extensions that fully emulate the I/O functions, and thus don't
have a corresponding DOS file handle. Upon the first call, this
function opens DOS's `NUL' device, so as to allocate a handle that
DOS won't then reuse. Upon subsequent calls, that handle is duplicated
by calling the DOS dup function; this makes all of the handles
use a single entry in the System File Table, and thus be independent of
what the `FILES=' parameter of `CONFIG.SYS' says.
__FSEXT_alloc_fd also assigns the handler function for the handle
it returns.
The module is responsible for calling _close on the descriptor
after setting the handler function to zero in the extended close
handler.
not ANSI, not POSIX
int socket()
{
int fd = __FSEXT_alloc_fd(socket_handler);
init_socket(fd);
return fd;
}
Go to the first, previous, next, last section, table of contents.