setsid             22 nt/inc/unistd.h extern pid_t setsid (void);
setsid           1916 src/emacs.c              setsid ();
setsid           2098 src/process.c    if (setsid () < 0)
setsid           4016 src/term.c       if (tcgetpgrp (fd) >= 0 && setsid () < 0)