fork1              52 user/sh.c      int fork1(void); // Fork but panics on failure.
fork1              95 user/sh.c          if (fork1() == 0)
fork1             105 user/sh.c          if (fork1() == 0) {
fork1             112 user/sh.c          if (fork1() == 0) {
fork1             127 user/sh.c          if (fork1() == 0)
fork1             172 user/sh.c            if (fork1() == 0)