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- /* Copyright (C) 1997-2000,2002,2003,2005,2006 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #include <features.h>
- #include <errno.h>
- #include <signal.h>
- #include <string.h>
- #include <sys/syscall.h>
- #include <bits/kernel_sigaction.h>
- #ifndef LIBC_SIGACTION
- extern __typeof(sigaction) __libc_sigaction;
- #endif
- #if defined __NR_rt_sigaction
- /* If ACT is not NULL, change the action for SIG to *ACT.
- If OACT is not NULL, put the old action for SIG in *OACT. */
- int
- __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
- {
- /* NB: kernel (as of 2.6.25) will return EINVAL
- * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t).
- * Try to catch this problem at uclibc build time: */
- struct BUG_sigset_size {
- int BUG_sigset_size
- [sizeof(act->sa_mask) == _NSIG / 8 ? 1 : -1];
- };
- return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask));
- }
- #else
- /* If ACT is not NULL, change the action for SIG to *ACT.
- If OACT is not NULL, put the old action for SIG in *OACT. */
- int
- __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
- {
- int result;
- struct old_kernel_sigaction kact, koact;
- if (act) {
- kact.k_sa_handler = act->sa_handler;
- kact.sa_mask = act->sa_mask.__val[0];
- kact.sa_flags = act->sa_flags;
- # ifdef HAVE_SA_RESTORER
- kact.sa_restorer = act->sa_restorer;
- # endif
- }
- result = __syscall_sigaction(sig,
- act ? &kact : NULL,
- oact ? &koact : NULL);
- if (oact && result >= 0) {
- oact->sa_handler = koact.k_sa_handler;
- oact->sa_mask.__val[0] = koact.sa_mask;
- oact->sa_flags = koact.sa_flags;
- # ifdef HAVE_SA_RESTORER
- oact->sa_restorer = koact.sa_restorer;
- # endif
- }
- return result;
- }
- #endif
- #ifndef LIBC_SIGACTION
- weak_alias(__libc_sigaction,sigaction)
- libc_hidden_weak(sigaction)
- #endif
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