types(5)types(5)NAMEtypes - primitive system data typesSYNOPSISDESCRIPTION
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 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. In some cases the typedef is actu‐
ally a shorthand for a commonly 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 or
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 identi‐
fiers.
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 or blkcnt_t
will become an int64_t.
STANDARDS CONFORMANCEtypes(5)