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229
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1 /* vi: set sw=4 ts=4: */
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2 /*
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3 * chvt.c switch virtual terminals
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4 *
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5 * Copyright (C) 2008 David Anders <danders@amltd.com>
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6 *
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7 */
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8
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9 #include "toys.h"
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10
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11 #define VT_ACTIVATE 0x5606
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12 #define VT_WAITACTIVE 0x5607
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13
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14 /* note get_console_fb() will need to be moved into a seperate lib section */
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15 int get_console_fd()
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16 {
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17 int fd;
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18
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19 fd = open("/dev/console", O_RDWR);
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20 if (fd >= 0)
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21 return fd;
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22
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23 fd = open("/dev/vc/0", O_RDWR);
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24 if (fd >= 0)
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25 return fd;
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26
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27 fd = open("/dev/tty", O_RDWR);
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28 if (fd >= 0)
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29 return fd;
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30
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31 return -1;
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32 }
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33
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34 void chvt_main(void)
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35 {
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36 int vtnum,fd;
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37
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38
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39 if(!*toys.optargs)
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40 return;
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41
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42 vtnum=atoi(*toys.optargs);
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43
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44 fd=get_console_fd();
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45 if (fd < 0)
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46 return;
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47
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48 if (ioctl(fd,VT_ACTIVATE,vtnum))
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49 return;
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50
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51 if (ioctl(fd,VT_WAITACTIVE,vtnum))
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52 return;
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53
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54 }
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