tcgetpgrp        1163 lib-src/emacsclient.c   pid_t tcpgrp = tcgetpgrp (STDOUT_FILENO);
tcgetpgrp          23 nt/inc/unistd.h extern pid_t tcgetpgrp (int);
tcgetpgrp        3073 src/emacs.c      pid_t tpgrp = tcgetpgrp (STDIN_FILENO);
tcgetpgrp        4016 src/term.c       if (tcgetpgrp (fd) >= 0 && setsid () < 0)