nvlist_get_descriptor
socket = dup(nvlist_get_descriptor(nvlin, "s"));
s = dup2(s, nvlist_get_descriptor(nvl, "s"));
CHECK(fd_is_valid(nvlist_get_descriptor(nvl, "nvlist/descriptor/STDERR_FILENO")));
CHECK(fd_is_valid(nvlist_get_descriptor(nvl, "nvlist/descriptor/STDERR_FILENO")));
nvlist_get_descriptor(nvl, "nvlist/descriptor/STDERR_FILENO"));
ATF_REQUIRE(fd_is_valid(nvlist_get_descriptor(nvl, name)));
fd = nvlist_get_descriptor(nvl, name);
ATF_REQUIRE(fd_is_valid(nvlist_get_descriptor(cnvl, cname)));
ATF_REQUIRE(fd_is_valid(nvlist_get_descriptor(cnvl, cname)));
int nvlist_get_descriptor(const nvlist_t *nvl, const char *name);
nvlist_get_descriptor(nvl, "fddir"),
filed->f_file = dup(nvlist_get_descriptor(nvl_filed, "f_file"));
filed->f_procdesc = dup(nvlist_get_descriptor(nvl_filed,