Mercurial > hg > toybox
view toys/other/chvt.c @ 1186:8b62561ce52a draft
Two changes to shut up GCC:
* __GLIBC__ was checked unconditionally;
this made for a very messy build on musl.
* int fd in chvt is always initialized; GCC 3.4 does not recognize this.
author | Isaac Dunham <ibid.ag@gmail.com> |
---|---|
date | Tue, 28 Jan 2014 10:10:25 -0600 |
parents | bfe79fc710da |
children | 57f2a26fa92c |
line wrap: on
line source
/* 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); }