PIOCPSINFO        290 maint/gnulib/lib/get_ppid_of.c       int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
PIOCPSINFO        385 maint/gnulib/lib/get_progname_of.c       int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);
PIOCPSINFO        240 maint/gnulib/lib/getprogname.c       int ioctl_ok = 0 <= ioctl (fd, PIOCPSINFO, &buf);