/* * 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 signum, const struct sigaction *act, struct sigaction *oldact) { struct kernel_sigaction kact, koact; int result; if (act) { kact.k_sa_handler = act->sa_handler; memcpy(&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask)); kact.sa_flags = act->sa_flags; if (kact.sa_flags & SA_RESTORER) kact.sa_restorer = act->sa_restorer; else kact.sa_restorer = __default_rt_sa_restorer; kact.sa_flags |= SA_RESTORER; } result = __syscall_rt_sigaction(signum, act ? __ptrvalue(&kact) : NULL, oldact ? __ptrvalue(&koact) : NULL, _NSIG / 8); if (oldact && result >= 0) { oldact->sa_handler = koact.k_sa_handler; memcpy(&oldact->sa_mask, &koact.sa_mask, sizeof(oldact->sa_mask)); oldact->sa_flags = koact.sa_flags; oldact->sa_restorer = koact.sa_restorer; } return result; }
/* 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; #ifdef SIGCANCEL if (sig == SIGCANCEL) { __set_errno (EINVAL); return -1; } #endif if (act) { kact.k_sa_handler = act->sa_handler; memcpy (&kact.sa_mask, &act->sa_mask, sizeof (kact.sa_mask)); 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 (oact->sa_mask)); oact->sa_flags = koact.sa_flags; # ifdef HAVE_SA_RESTORER oact->sa_restorer = koact.sa_restorer; # endif } return result; }
/* 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)); }
/* * 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; if (act && !(act->sa_flags & SA_RESTORER)) { memcpy(&kact, act, sizeof(kact)); kact.sa_restorer = __default_rt_sa_restorer; kact.sa_flags |= SA_RESTORER; act = &kact; } /* NB: kernel (as of 2.6.25) will return EINVAL * if sizeof(act->sa_mask) does not match kernel's sizeof(sigset_t) */ return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask)); }
/* 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 (kact.sa_mask)); kact.sa_flags = act->sa_flags; # ifdef HAVE_SA_RESTORER if (kact.sa_flags & (SA_RESTORER | SA_ONSTACK)) { kact.sa_restorer = act->sa_restorer; } else { if (kact.sa_flags & SA_SIGINFO) { kact.sa_restorer = __default_rt_sa_restorer; } else { kact.sa_restorer = __default_sa_restorer; kact.sa_flags |= 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 (oact->sa_mask)); oact->sa_flags = koact.sa_flags; # ifdef HAVE_SA_RESTORER oact->sa_restorer = koact.sa_restorer; # endif } return result; }