Man Linux: Main Page and Category List

NAME

       major_minor - PERL start engine

SYNOPSIS

       eval ‘major_minor‘;

       $major_number = &dev_major($devnum);

       $minor_number = &dev_minor($devnum);

DESCRIPTION

       major_minor  emits  two PERL routines, dev_major() and dev_minor() that
       take a device number as returned by stat() and that break the number up
       into the device major and minor number, respectively.

       For example, the FreeBSD 2.2 output is:

       sub dev_major { local($dev) = @_; ($dev >> 8) & 0xff; };

       sub dev_minor { local($dev) = @_; ($dev & 0xffff00ff); };

       1;

       In  principle,  this  information  could  be obtained by parsing system
       include files, but a little C program is more robust.

HISTORY

       A similar trick was used first with the SATAN program.

LICENSE

       This software is distributed under the IBM Public License.

AUTHOR(S)

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA