/*
* 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;
}
