1/* Copyright (C) 1997-2018 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 <http://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <signal.h>
20#include <string.h>
21#include <sysdep-cancel.h>
22
23int
24__sigtimedwait (const sigset_t *set, siginfo_t *info,
25 const struct timespec *timeout)
26{
27 sigset_t tmpset;
28 if (set != NULL
29 && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
30 || __builtin_expect (__sigismember (set, SIGSETXID), 0)))
31 {
32 /* Create a temporary mask without the bit for SIGCANCEL set. */
33 // We are not copying more than we have to.
34 memcpy (&tmpset, set, _NSIG / 8);
35 __sigdelset (&tmpset, SIGCANCEL);
36 __sigdelset (&tmpset, SIGSETXID);
37 set = &tmpset;
38 }
39
40 /* XXX The size argument hopefully will have to be changed to the
41 real size of the user-level sigset_t. */
42 int result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, timeout, _NSIG / 8);
43
44 /* The kernel generates a SI_TKILL code in si_code in case tkill is
45 used. tkill is transparently used in raise(). Since having
46 SI_TKILL as a code is useful in general we fold the results
47 here. */
48 if (result != -1 && info != NULL && info->si_code == SI_TKILL)
49 info->si_code = SI_USER;
50
51 return result;
52}
53libc_hidden_def (__sigtimedwait)
54weak_alias (__sigtimedwait, sigtimedwait)
55