/* 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