NAME

mknod.h − macros for handling device numbers

SYNOPSIS

#include <sys/mknod.h>

DESCRIPTION

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

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. 

It 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(2), 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(3S) specification that prints the minor number in the format best suited to the particular implementation; it is used by the long format of 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. 

SEE ALSO

ls(1), mknod(1M), mknod(2), printf(3S). 

Hewlett-Packard Company  —  HP-UX Release 9.0: August 1992