1 /* Copyright (C) 1997-2000,2002,2003,2005,2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <sys/syscall.h>
25 #include <bits/kernel_sigaction.h>
27 #ifndef LIBC_SIGACTION
28 extern __typeof(sigaction) __libc_sigaction;
32 #if defined __NR_rt_sigaction
34 /* If ACT is not NULL, change the action for SIG to *ACT.
35 If OACT is not NULL, put the old action for SIG in *OACT. */
37 __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
39 /* NB: kernel (as of 2.6.25) will return EINVAL
40 * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t).
41 * Try to catch this problem at uclibc build time: */
42 struct BUG_sigset_size {
44 [sizeof(act->sa_mask) == _NSIG / 8 ? 1 : -1];
46 return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask));
51 /* If ACT is not NULL, change the action for SIG to *ACT.
52 If OACT is not NULL, put the old action for SIG in *OACT. */
54 __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
57 struct old_kernel_sigaction kact, koact;
60 kact.k_sa_handler = act->sa_handler;
61 kact.sa_mask = act->sa_mask.__val[0];
62 kact.sa_flags = act->sa_flags;
63 # ifdef HAVE_SA_RESTORER
64 kact.sa_restorer = act->sa_restorer;
67 result = __syscall_sigaction(sig,
69 oact ? &koact : NULL);
70 if (oact && result >= 0) {
71 oact->sa_handler = koact.k_sa_handler;
72 oact->sa_mask.__val[0] = koact.sa_mask;
73 oact->sa_flags = koact.sa_flags;
74 # ifdef HAVE_SA_RESTORER
75 oact->sa_restorer = koact.sa_restorer;
84 #ifndef LIBC_SIGACTION
85 weak_alias(__libc_sigaction,sigaction)
86 libc_hidden_weak(sigaction)