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authorUlrich Drepper <drepper@redhat.com>2001-07-18 20:31:08 +0000
committerUlrich Drepper <drepper@redhat.com>2001-07-18 20:31:08 +0000
commitf2ebcef262efd8b706c13b4729edb19c0c503420 (patch)
treeb1c96507062b6713b6e6580f5275b45d024a27d1
parentadb2a70d2300529c9d7fb91f1678f971c1a59f05 (diff)
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Define DEV_TTY_P.
-rw-r--r--sysdeps/generic/device-nrs.h5
-rw-r--r--sysdeps/unix/sysv/linux/device-nrs.h17
2 files changed, 20 insertions, 2 deletions
diff --git a/sysdeps/generic/device-nrs.h b/sysdeps/generic/device-nrs.h
index 3ff5c39..b0ce668 100644
--- a/sysdeps/generic/device-nrs.h
+++ b/sysdeps/generic/device-nrs.h
@@ -1,5 +1,5 @@
/* Device numbers of devices used in the implementation. Generic version.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -22,4 +22,7 @@
/* By default we know no device numbers. */
+/* We cannot check whether a given device is a tty. */
+#define DEV_TTY_P(dev) (0)
+
#endif /* device-nrs.h */
diff --git a/sysdeps/unix/sysv/linux/device-nrs.h b/sysdeps/unix/sysv/linux/device-nrs.h
index cef929b..d08d81c 100644
--- a/sysdeps/unix/sysv/linux/device-nrs.h
+++ b/sysdeps/unix/sysv/linux/device-nrs.h
@@ -1,5 +1,5 @@
/* Device numbers of devices used in the implementation. Linux version.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -20,8 +20,23 @@
#ifndef _DEVICE_NRS_H
#define _DEVICE_NRS_H 1
+#include <sys/sysmacros.h>
+
/* /dev/null is (1,3). */
#define DEV_NULL_MAJOR 1
#define DEV_NULL_MINOR 3
+/* Pseudo tty slaves. For Linux we use the Unix98 ttys. We could
+ also include the old BSD-style tty buts they should not be used and
+ the extra test would only slow down correctly set up systems. If a
+ system still uses those device the slower tests performed (using
+ isatty) will catch it. */
+#define DEV_TTY_LOW_MAJOR 136
+#define DEV_TTY_HIGH_MAJOR 143
+
+/* Test whether given device is a tty. */
+#define DEV_TTY_P(dev) \
+ ({ int __dev_major = major (dev); \
+ __dev_major >= DEV_TTY_LOW_MAJOR && __dev_major <= DEV_TTY_HIGH_MAJOR; })
+
#endif /* device-nrs.h */