Jump to content United States-English
HP.com Home Products and Services Support and Drivers Solutions How to Buy
» Contact HP
More options
HP.com home
HP-UX Reference > M


HP-UX 11i Version 3: February 2007

Technical documentation

» Feedback
Content starts here

 » Table of Contents

 » Index


mknod.h — header file of macros for handling device numbers


#include <sys/mknod.h>


The header file <sys/mknod.h> defines macros to create and interpret device identification numbers for use with the mknod() system call (see mknod(2)).

The use of these macros is architecture-dependent. See the System Administration Manual for your system for information on how to select major and minor device numbers.

mknod.h contains the macro

dev_t makedev(int major, int minor)

which packs the major and minor components into a device identification number suitable for the dev argument of mknod(), and the two macros:

int major(dev_t dev) int minor(dev_t dev)

which extract the major and minor number components, respectively, from a device identification number, dev.

The macro MINOR_FORMAT is a printf() specification (see printf(3S)) that prints the minor number in the format best suited to the particular implementation; it is used by the long format of the ls command (see ls(1)) to show the minor numbers for device files.

The base of the number is indicated in the same way as in the C programming language: no leading zero for decimal, leading zero for octal, and leading 0x for hexadecimal.

Printable version
Privacy statement Using this site means you accept its terms Feedback to webmaster
© 1983-2007 Hewlett-Packard Development Company, L.P.