static void alt_open_fd(alt_fd* fd, const char* name, int flags, int mode)
{
int old;
old = open (name, flags, mode);
if (old >= 0)
{
fd->dev = alt_fd_list[old].dev;
fd->priv = alt_fd_list[old].priv;
fd->fd_flags = alt_fd_list[old].fd_flags;
alt_release_fd (old);
}
}
int ALT_CLOSE (int fildes)
{
alt_fd* fd;
int rval;
/*
* A common error case is that when the file descriptor was created, the call
* to open() failed resulting in a negative file descriptor. This is trapped
* below so that we don't try and process an invalid file descriptor.
*/
fd = (fildes < 0) ? NULL : &alt_fd_list[fildes];
if (fd)
{
/*
* If the associated file system/device has a close function, call it so
* that any necessary cleanup code can run.
*/
rval = (fd->dev->close) ? fd->dev->close(fd) : 0;
/* Free the file descriptor structure and return. */
alt_release_fd (fildes);
if (rval < 0)
{
ALT_ERRNO = -rval;
return -1;
}
return 0;
}
else
{
ALT_ERRNO = EBADFD;
return -1;
}
}
