Mercurial > hg > toybox
annotate toys/other/chvt.c @ 944:b4faf2ae39e8
This inlines CRC64, and nothing more.
The functions involved were called only once.
author | Isaac Dunham <idunham@lavabit.com> |
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date | Sat, 06 Jul 2013 11:26:15 -0500 |
parents | 786841fdb1e0 |
children | bfe79fc710da |
rev | line source |
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1 /* chvt.c - switch virtual terminals |
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2 * |
229 | 3 * Copyright (C) 2008 David Anders <danders@amltd.com> |
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4 |
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5 USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN)) |
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6 |
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7 config CHVT |
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8 bool "chvt" |
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9 default y |
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10 help |
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11 usage: chvt N |
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12 |
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13 Change to virtual terminal number N. (This only works in text mode.) |
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14 |
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15 Virtual terminals are the Linux VGA text mode displays, ordinarily |
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16 switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch |
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17 from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back. |
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18 */ |
229 | 19 |
20 #include "toys.h" | |
21 | |
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22 /* Note: get_console_fb() will need to be moved into a seperate lib section */ |
229 | 23 int get_console_fd() |
24 { | |
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25 int fd; |
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26 char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc; |
229 | 27 |
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28 cc = consoles; |
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29 while (*cc) { |
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30 fd = open(*cc++, O_RDWR); |
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31 if (fd >= 0) return fd; |
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32 } |
229 | 33 |
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34 return -1; |
229 | 35 } |
36 | |
37 void chvt_main(void) | |
38 { | |
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39 int vtnum, fd; |
229 | 40 |
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41 vtnum=atoi(*toys.optargs); |
229 | 42 |
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43 fd=get_console_fd(); |
786841fdb1e0
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44 // These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h |
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45 if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum)) |
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46 perror_exit(NULL); |
229 | 47 } |