ref: ea413b4a62be9993e4b63bf237f0b1d482f4aafa
dir: /sys/src/cmd/vt/consctl.c/
#include <u.h> #include <libc.h> #include <draw.h> #include "cons.h" /* * bind a pipe onto consctl and keep reading it to * get changes to console state. */ Consstate* consctl(void) { int i, n, fd, tries; char buf[128]; Consstate *x; char *field[10]; x = segattach(0, "shared", 0, sizeof *x); if(x == (void*)-1) sysfatal("segattach: %r"); /* a pipe to simulate consctl */ if(bind("#|", "/mnt/consctl", MBEFORE) < 0 || bind("/mnt/consctl/data1", "/dev/consctl", MREPL) < 0) sysfatal("bind consctl: %r"); /* a pipe to simulate the /dev/cons */ if(bind("#|", "/mnt/cons", MREPL) < 0 || bind("/mnt/cons/data1", "/dev/cons", MREPL) < 0) sysfatal("bind cons: %r"); switch(fork()){ case -1: sysfatal("fork: %r"); case 0: break; default: return x; } notify(0); for(tries = 0; tries < 100; tries++){ x->raw = 0; x->hold = 0; fd = open("/mnt/consctl/data", OREAD); if(fd < 0) break; tries = 0; for(;;){ n = read(fd, buf, sizeof(buf)-1); if(n <= 0) break; buf[n] = 0; n = getfields(buf, field, 10, 1, " "); for(i = 0; i < n; i++){ if(strcmp(field[i], "rawon") == 0) x->raw = 1; else if(strcmp(field[i], "rawoff") == 0) x->raw = 0; else if(strcmp(field[i], "holdon") == 0) x->hold = 1; else if(strcmp(field[i], "holdoff") == 0) x->hold = 0; } } close(fd); } exits(0); return 0; /* dummy to keep compiler quiet*/ }