Mercurial > hg > toybox
view toys/chvt.c @ 308:52600eee8dd6
Add "tee" command.
author | Rob Landley <rob@landley.net> |
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date | Thu, 03 Jul 2008 19:19:00 -0500 |
parents | d9ea4ca7ae8c |
children | 17c0a2013852 |
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/* vi: set sw=4 ts=4: * * chvt.c - switch virtual terminals * * Copyright (C) 2008 David Anders <danders@amltd.com> * * Not in SUSv3. 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" #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(!*toys.optargs) return; vtnum=atoi(*toys.optargs); fd=get_console_fd(); if (fd < 0 || ioctl(fd,VT_ACTIVATE,vtnum) || ioctl(fd,VT_WAITACTIVE,vtnum)) { perror_exit(NULL); } }