_ksem_open
if (_ksem_open(name, oflag, mode, value, &semid) == -1)
__weak_alias(_ksem_open,rump___sysimpl__ksem_open);
int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *);
ATF_REQUIRE_EQ(_ksem_open("/ksem_b", O_CREAT | O_EXCL, 0644, 0, &ksem),
ATF_REQUIRE_EQ(_ksem_open("/ksem_b", O_CREAT | O_EXCL, 0644, 1, &ksem1),
ATF_REQUIRE_EQ(_ksem_open("/ksem_x", O_CREAT | O_EXCL, 0644, 0, &ksem),
int _ksem_open(const char *, int, mode_t, unsigned int, intptr_t *);