Mercurial > hg > toybox
view toys/other/chvt.c @ 1239:9a13e6637d7b draft
Decided not to go with the sflate implementation of deflate/inflate. The decompression side's already reimplemented in compress, and I'm working on compression side.
author | Rob Landley <rob@landley.net> |
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date | Wed, 02 Apr 2014 06:37:14 -0500 |
parents | 8b62561ce52a |
children | 57f2a26fa92c |
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/* chvt.c - switch virtual terminals * * Copyright (C) 2008 David Anders <danders@amltd.com> USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_SBIN)) config CHVT bool "chvt" default y help 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" void chvt_main(void) { int vtnum, fd = fd; char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc; vtnum=atoi(*toys.optargs); for (cc = consoles; *cc; cc++) if (-1 != (fd = open(*cc, O_RDWR))) break; // These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h if (!*cc || fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum)) perror_exit(0); }