diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/makedev.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/makedev.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/makedev.c b/sysdeps/unix/sysv/linux/makedev.c new file mode 100644 index 0000000000..4708e6d419 --- /dev/null +++ b/sysdeps/unix/sysv/linux/makedev.c @@ -0,0 +1,41 @@ +/* Definitions of functions to access `dev_t' values. + Copyright (C) 2003 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <endian.h> +#include <sys/sysmacros.h> + +unsigned int +major (unsigned long long int dev) +{ + return ((dev >> 8) & 0xfff) | ((unsigned int) (dev >> 32) & ~0xfff); +} + +unsigned int +minor (unsigned long long int dev) +{ + return (dev & 0xff) | ((unsigned int) (dev >> 12) & ~0xff); +} + +unsigned long long int +makedev (unsigned int major, unsigned int minor) +{ + return ((minor & 0xff) | ((major & 0xfff) << 8) + | (((unsigned long long int) (minor & ~0xff)) << 12) + | (((unsigned long long int) (major & ~0xfff)) << 32)); +} |