1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <signal.h> |
20 | #include <hurd.h> |
21 | #include <hurd/signal.h> |
22 | #include <hurd/msg.h> |
23 | |
24 | /* If SET is not NULL, modify the current set of blocked signals |
25 | according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK. |
26 | If OSET is not NULL, store the old set of blocked signals in *OSET. */ |
27 | int |
28 | __sigprocmask (int how, const sigset_t *set, sigset_t *oset) |
29 | { |
30 | struct hurd_sigstate *ss; |
31 | sigset_t old, new; |
32 | sigset_t pending; |
33 | |
34 | if (set != NULL) |
35 | new = *set; |
36 | |
37 | ss = _hurd_self_sigstate (); |
38 | |
39 | _hurd_sigstate_lock (ss); |
40 | |
41 | old = ss->blocked; |
42 | |
43 | if (set != NULL) |
44 | { |
45 | switch (how) |
46 | { |
47 | case SIG_BLOCK: |
48 | __sigorset (dest: &ss->blocked, left: &ss->blocked, right: &new); |
49 | break; |
50 | |
51 | case SIG_UNBLOCK: |
52 | ss->blocked &= ~new; |
53 | break; |
54 | |
55 | case SIG_SETMASK: |
56 | ss->blocked = new; |
57 | break; |
58 | |
59 | default: |
60 | _hurd_sigstate_unlock (ss); |
61 | errno = EINVAL; |
62 | return -1; |
63 | } |
64 | |
65 | ss->blocked &= ~_SIG_CANT_MASK; |
66 | } |
67 | |
68 | pending = _hurd_sigstate_pending (ss) & ~ss->blocked; |
69 | |
70 | _hurd_sigstate_unlock (ss); |
71 | |
72 | if (oset != NULL) |
73 | *oset = old; |
74 | |
75 | if (pending) |
76 | /* Send a message to the signal thread so it |
77 | will wake up and check for pending signals. */ |
78 | __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); |
79 | |
80 | return 0; |
81 | } |
82 | |
83 | libc_hidden_def (__sigprocmask) |
84 | weak_alias (__sigprocmask, sigprocmask) |
85 | |