HP-UX Reference (11i v3 07/02) - 5 Miscellaneous Topics (vol 9)

mknod(5) mknod(5)

NAME

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

SYNOPSIS

#include <sys/mknod.h>

DESCRIPTION

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 argu-

ment 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.