diff options
Diffstat (limited to 'src/kernel/proc.c')
| -rw-r--r-- | src/kernel/proc.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/kernel/proc.c b/src/kernel/proc.c index 85992d5..6bc7754 100644 --- a/src/kernel/proc.c +++ b/src/kernel/proc.c @@ -287,6 +287,14 @@ handle_t process_find_free_handle(struct process *proc, handle_t start_at) { } struct handle *process_handle_get(struct process *p, handle_t id) { + if (id == HANDLE_NULLFS) { + static struct handle h = (struct handle){ + .type = HANDLE_FS_FRONT, + .backend = NULL, + .refcount = 2, + }; + return &h; + } if (id < 0 || id >= HANDLE_MAX) return NULL; return p->_handles[id]; } @@ -311,7 +319,7 @@ handle_t process_handle_dup(struct process *p, handle_t from, handle_t to) { if (to == from) return to; toh = &p->_handles[to]; - fromh = (from >= 0 && from < HANDLE_MAX) ? p->_handles[from] : NULL; + fromh = process_handle_get(p, from); if (*toh) handle_close(*toh); *toh = fromh; @@ -321,7 +329,9 @@ handle_t process_handle_dup(struct process *p, handle_t from, handle_t to) { } struct handle *process_handle_take(struct process *p, handle_t hid) { - if (hid < 0 || hid >= HANDLE_MAX) return NULL; + if (hid < 0 || hid >= HANDLE_MAX) { + return process_handle_get(p, hid); + } struct handle *h = p->_handles[hid]; p->_handles[hid] = NULL; return h; |