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-rw-r--r--include/linux/vt.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/vt.h b/include/linux/vt.h
index 9f95b0bea5b3..8ab334a48222 100644
--- a/include/linux/vt.h
+++ b/include/linux/vt.h
@@ -1,6 +1,16 @@
#ifndef _LINUX_VT_H
#define _LINUX_VT_H
+/*
+ * These constants are also useful for user-level apps (e.g., VC
+ * resizing).
+ */
+#define MIN_NR_CONSOLES 1 /* must be at least 1 */
+#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
+#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
+ /* Note: the ioctl VT_GETSTATE does not work for
+ consoles 16 and higher (since it returns a short) */
+
/* 0x56 is 'V', to avoid collision with termios and kd */
#define VT_OPENQRY 0x5600 /* find available vt */