major_minor1

Usage

Overview

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.

Author(s)

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