HP-UX Reference (11i v3 07/02) - 4 File Formats (vol 8)

magic(4) magic(4)

NAME

magic - magic numbers for HP-UX implementations

SYNOPSIS

#include <magic.h>

DESCRIPTION

The magic.h ﬁle localizes all information about HP-UX "magic numbers" in one ﬁle, thus facilitating uni-

form treatment of magic numbers. This ﬁle speciﬁes the location of the magic number in a ﬁle (always the

start of the ﬁle) and the structure of the magic number:

struct magic_number {

unsigned short system_id;

unsigned short file_type;

};

typedef struct magic_number MAGIC;

magic.h

includes deﬁnitions for the system IDs of all HP machines running HP-UX, and ﬁle types that

are common to all implementations. There may be additional implementation-dependent ﬁle types. The

predeﬁned ﬁle types are:

/* for object code files */

#define RELOC_MAGIC 0x106 /* relocatable only */

#define EXEC_MAGIC 0x107 /* normal executable */

#define SHARE_MAGIC 0x108 /* shared executable */

#define DEMAND_MAGIC 0x10B /* demand-load executable */

#define LISP_MAGIC 0x10C /* compiled Lisp */

#define DL_MAGIC 0x10D /* dynamic load library */

#define SHL_MAGIC 0x10E /* shared library */

#define HPE_MAGIC 0x150 /* HPE boot image */

The values for system_id are deﬁned in model(4).

WARNINGS

Files managed by cpio use a different form of magic number that is incompatible with

<magic.h>.