ref: 0aae832ac3f3ae5d136563e980e9c32ceb0d1444
dir: /sys/src/ape/lib/v/plan9/tty.c/
/* * turn raw (no echo, etc.) on and off. * ptyfs is gone, so don't even try tcsetattr, etc. */ #define _POSIX_SOURCE #define _RESEARCH_SOURCE #include <sys/types.h> #include <unistd.h> #include <fcntl.h> #include <libv.h> static int ctlfd = -1; /* fd is ignored */ tty_echooff(int fd) { if(ctlfd >= 0) return 0; ctlfd = open("/dev/consctl", O_WRONLY); if(ctlfd < 0) return -1; write(ctlfd, "rawon", 5); return 0; } tty_echoon(int fd) { if(ctlfd >= 0){ write(ctlfd, "rawoff", 6); close(ctlfd); ctlfd = -1; return 0; } return -1; }