FORK_NOJOB
if (forkshell(jp, NULL, FORK_NOJOB) == 0) {
mode = FORK_NOJOB;
} else if (mode == FORK_NOJOB) {
if (forkshell(jp, n, FORK_NOJOB) == 0) {
if (rootshell && mode != FORK_NOJOB && mflag) {
if (wasroot && mode != FORK_NOJOB && mflag) {
if (forkshell(NULL, NULL, FORK_NOJOB) == 0) {