types.5 (2010 09)

ManualsBrandsHP ManualsSoftwareHP-UX Manpages

types(5) types(5)

NAME

types - primitive system data types

SYNOPSIS

#include <sys/types.h>

DESCRIPTION

Remarks

The example given on this page is a typical version. The type names are in general expected to be

present, although exceptions (if any) may be described in DEPENDENCIES. In most cases the funda-

mental type which implements each typedef is implementation dependent as long as source code which

uses those typedefs need not be changed. In some cases the typedef is actually a shorthand for a com-

monly used type, and will not vary.

The data types deﬁned in the include ﬁle are used in HP-UX system code; some data of these types are

accessible to user code:

typedef struct { int r[1]; } *physadr;

typedef char *caddr_t;

typedef unsigned int uint;

typedef unsigned short ushort;

typedef unsigned long ino_t;

typedef short cnt_t;

typedef long time_t;

typedef long dev_t;

typedef long off_t;

typedef long paddr_t;

typedef long key_t;

typedef int32_t pid_t;

typedef long uid_t;

typedef long gid_t;

typedef long blkcnt_t;

Note that the deﬁned names above are standardized, but the actual type to which they are deﬁned may

vary between HP-UX implementations.

The meanings of the types are:

physadr used as a pointer to memory; the pointer is aligned to follow hardware-dependent

instruction addressing conventions.

caddr_t used as an untyped pointer or a pointer to untyped memory.

uint shorthand for unsigned integer.

ushort shorthand for unsigned short.

ino_t used to specify I-numbers. All native ﬁle systems (including HFS and VxFS 3.5)

through HP-UX 11i, use values that will ﬁt within 32-bits. Some remote NFS servers

may use larger values, which will be truncated without error for 32-bit applications

and may not result in unique values.

cnt_t used in some implementations to hold reference counts for some kernel data structures.

time_t time encoded in seconds since 00:00:00 GMT, January 1, 1970.

dev_t speciﬁes kind and unit number of a device, encoded in two parts known as major and

minor.

off_t offset measured in bytes from the beginning of a ﬁle. If a 32-bit application is compiled

with

-D_FILE_OFFSET_BITS=64 or -D_LARGEFILE64_SOURCE, off_t will

become an int64_t .

paddr_t used as an integer type which is properly sized to hold a pointer.

key_t the type of a key used to obtain a message queue, semaphore, or shared memory

identiﬁer, see stdipc (3C).

pid_t used to specify process and process group identiﬁers.

HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

Summary of content (2 pages)

PAGE 1
types(5) types(5) NAME types - primitive system data types SYNOPSIS #include DESCRIPTION Remarks The example given on this page is a typical version. The type names are in general expected to be present, although exceptions (if any) may be described in DEPENDENCIES. In most cases the fundamental type which implements each typedef is implementation dependent as long as source code which uses those typedefs need not be changed.
PAGE 2
types(5) types(5) uid_t used to specify user identifiers. gid_t user to specify group identifiers. blkcnt_t disk quota or transfer size measured in blocks. If a 32-bit application is compiled with -D_FILE_OFFSET_BITS=64 or -D_LARGEFILE64_SOURCE, blkcnt_t will become an int64_t . STANDARDS CONFORMANCE : AES, SVID3, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.