old_mask          481 src/subshell/common.c     sigset_t sigchld_mask, old_mask;
old_mask          485 src/subshell/common.c     sigprocmask (SIG_BLOCK, &sigchld_mask, &old_mask);
old_mask          491 src/subshell/common.c     sigdelset (&old_mask, SIGCHLD);
old_mask          495 src/subshell/common.c         sigsuspend (&old_mask);
old_mask          506 src/subshell/common.c     sigprocmask (SIG_SETMASK, &old_mask, NULL);