1 files changed, 51 insertions, 0 deletions
diff --git a/toys/other/chvt.c b/toys/other/chvt.c
new file mode 100644
index 00000000..9afb059b
--- /dev/null
+++ b/toys/other/chvt.c
@@ -0,0 +1,51 @@
+/* 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"
+
+/* Note: get_console_fb() will need to be moved into a seperate lib section */
+int get_console_fd()
+{
+	int fd;
+	char *consoles[]={"/dev/console", "/dev/vc/0", "/dev/tty", NULL}, **cc;
+
+	cc = consoles;
+	while (*cc) {
+		fd = open(*cc++, O_RDWR);
+		if (fd >= 0) return fd;
+	}
+
+	return -1;
+}
+
+void chvt_main(void)
+{
+	int vtnum, fd;
+
+	vtnum=atoi(*toys.optargs);
+
+	fd=get_console_fd();
+	// These numbers are VT_ACTIVATE and VT_WAITACTIVE from linux/vt.h
+	if (fd < 0 || ioctl(fd, 0x5606, vtnum) || ioctl(fd, 0x5607, vtnum))
+		perror_exit(NULL);
+}