diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/device-nrs.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/device-nrs.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/device-nrs.h b/sysdeps/unix/sysv/linux/device-nrs.h index cef929b798..d08d81cf25 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 */ |