/* * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com) * * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. */ #include <errno.h> #include <signal.h> #include <string.h> #include <sys/syscall.h> #include <bits/kernel_sigaction.h> /* * Default sigretrun stub if user doesn't specify SA_RESTORER */ extern void __default_rt_sa_restorer(void); #define SA_RESTORER 0x04000000 /* 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) { struct sigaction kact; /* * SA_RESTORER is only relevant for act != NULL case * (!act means caller only wants to know @oact) */ if (act && !(act->sa_flags & SA_RESTORER)) { kact.sa_restorer = __default_rt_sa_restorer; kact.sa_flags = act->sa_flags | SA_RESTORER; kact.sa_handler = act->sa_handler; kact.sa_mask = act->sa_mask; act = &kact; } return INLINE_SYSCALL(rt_sigaction, 4, sig, act, oact, sizeof(act->sa_mask)); } #ifndef LIBC_SIGACTION # ifndef __UCLIBC_HAS_THREADS__ strong_alias(__libc_sigaction,sigaction) libc_hidden_def(sigaction) # else weak_alias(__libc_sigaction,sigaction) libc_hidden_weak(sigaction) # endif #endif