1 #include <signal.h> 2 #include <errno.h> 3 #include "syscall.h" 4 pthread_sigmask(int how,const sigset_t * restrict set,sigset_t * restrict old)5int pthread_sigmask(int how, const sigset_t *restrict set, sigset_t *restrict old) 6 { 7 int ret; 8 if (set && (unsigned)how - SIG_BLOCK > 2U) return EINVAL; 9 ret = -__syscall(SYS_rt_sigprocmask, how, set, old, _NSIG/8); 10 if (!ret && old) { 11 if (sizeof old->__bits[0] == 8) { 12 old->__bits[0] &= ~0x380000000ULL; 13 } else { 14 old->__bits[0] &= ~0x80000000UL; 15 old->__bits[1] &= ~0x3UL; 16 } 17 } 18 return ret; 19 } 20