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#include <kernel/fd.h>
#include <kernel/mem.h>
#include <kernel/panic.h>
#include <kernel/proc.h>
static int fdop_special_tty(enum fdop fdop, struct fd *fd, void *ptr, size_t len);
int fdop_dispatch(enum fdop fdop, struct fd *fd, void *ptr, size_t len) {
switch(fd->type) {
case FD_EMPTY:
return -1;
case FD_SPECIAL_TTY:
return fdop_special_tty(fdop, fd, ptr, len);
default:
panic();
}
}
static int fdop_special_tty(enum fdop fdop, struct fd *fd, void *ptr, size_t len) {
switch(fdop) {
case FDOP_READ:
return -1; // input not implemented yet
case FDOP_WRITE: {
struct virt_iter iter;
virt_iter_new(&iter, (void*)ptr, len,
process_current->pages, true, false);
while (virt_iter_next(&iter))
tty_write(iter.frag, iter.frag_len);
return iter.prior;
}
case FDOP_CLOSE:
fd->type = FD_EMPTY;
return 0;
default: panic();
}
}
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