view toys/other/chvt.c @ 684:4d9fa8b8a300

Use stridx.
author Rob Landley <>
date Fri, 02 Nov 2012 09:50:09 -0500
parents 6df4ccc0acbe
children 786841fdb1e0
line wrap: on
line source

/* vi: set sw=4 ts=4:
 * chvt.c - switch virtual terminals
 * Copyright (C) 2008 David Anders <>


config CHVT
	bool "chvt"
	default y
	  usage: chvt N

	  Change to virtual terminal number N.  (This only works in text mode.)

	  Virtual terminals are the Linux VGA text mode displays, ordinarily
	  switched between via alt-F1, alt-F2, etc.  Use ctrl-alt-F1 to switch
	  from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back.

#include "toys.h"

/* Note: get_console_fb() will need to be moved into a seperate lib section */
int get_console_fd()
	int fd;
	char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc;

	cc = consoles;
	while (*cc) {
		fd = open(*cc++, O_RDWR);
		if (fd >= 0) return fd;

	return -1;

void chvt_main(void)
	int vtnum, fd;


	// These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h
	if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum))