/* Copyright (C) 1997,1998,1999,2000,2002,2003 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 <errno.h> #include <signal.h> #include <string.h> #include <sys/syscall.h> /* The difference here is that the sigaction structure used in the kernel is not the same as we use in the libc. Therefore we must translate it here. */ #include <bits/kernel_sigaction.h> #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) { int result; struct kernel_sigaction kact, koact; if (act) { kact.k_sa_handler = act->sa_handler; __memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); kact.sa_flags = act->sa_flags; # ifdef HAVE_SA_RESTORER kact.sa_restorer = act->sa_restorer; # endif } /* XXX The size argument hopefully will have to be changed to the real size of the user-level sigset_t. */ result = __syscall_rt_sigaction(sig, act ? __ptrvalue (&kact) : NULL, oact ? __ptrvalue (&koact) : NULL, _NSIG / 8); if (oact && result >= 0) { oact->sa_handler = koact.k_sa_handler; __memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); oact->sa_flags = koact.sa_flags; # ifdef HAVE_SA_RESTORER oact->sa_restorer = koact.sa_restorer; # endif } return result; } #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 ? __ptrvalue (&kact) : NULL, oact ? __ptrvalue (&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 hidden_weak_alias(__libc_sigaction,__sigaction) weak_alias(__libc_sigaction,sigaction) #endif