1 /* chvt.c - switch virtual terminals 2 * 3 * Copyright (C) 2008 David Anders <danders (at) amltd.com> 4 5 USE_CHVT(NEWTOY(chvt, "<1", TOYFLAG_USR|TOYFLAG_BIN)) 6 7 config CHVT 8 bool "chvt" 9 default y 10 help 11 usage: chvt N 12 13 Change to virtual terminal number N. (This only works in text mode.) 14 15 Virtual terminals are the Linux VGA text mode displays, ordinarily 16 switched between via alt-F1, alt-F2, etc. Use ctrl-alt-F1 to switch 17 from X to a virtual terminal, and alt-F6 (or F7, or F8) to get back. 18 */ 19 20 #include "toys.h" 21 22 void chvt_main(void) 23 { 24 int vtnum, fd = fd; 25 char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc; 26 27 vtnum=atoi(*toys.optargs); 28 for (cc = consoles; *cc; cc++) 29 if (-1 != (fd = open(*cc, O_RDWR))) break; 30 31 // These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h 32 if (!*cc || fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum)) 33 perror_exit(0); 34 } 35
