view toys/chvt.c @ 233:d4176f3f3835

Zap toys/ and instead create generated/ from contents of toys/*.c. Move relevant info into comment at the top of each toys/*.c. Also convert more of Makefile into a thin wrapper around shell scripts that actually do the work. (Makefile is only still there for the user interface.)
author Rob Landley <>
date Sat, 19 Jan 2008 17:08:39 -0600
parents 87390c3700c1
children 163498bf547b
line wrap: on
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/* vi: set sw=4 ts=4:
 * chvt.c switch virtual terminals
 * Copyright (C) 2008 David Anders <>
 * Not in SUSv3.

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"

#define VT_ACTIVATE	0x5606
#define VT_WAITACTIVE	0x5607

/* note get_console_fb() will need to be moved into a seperate lib section */
int get_console_fd()
    int fd;

    fd = open("/dev/console", O_RDWR);
    if (fd >= 0)
	return fd;

    fd = open("/dev/vc/0", O_RDWR);
    if (fd >= 0)
	return fd;

    fd = open("/dev/tty", O_RDWR);
    if (fd >= 0)
	return fd;

    return -1;

void chvt_main(void)
    int vtnum,fd;



    if (fd < 0)
    if (ioctl(fd,VT_ACTIVATE,vtnum))

    if (ioctl(fd,VT_WAITACTIVE,vtnum))