hpux man page for types

types(5)							File Formats Manual							  types(5)

NAME
       types - primitive system data types

SYNOPSIS
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 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 actually 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 identifiers.

	      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 CONFORMANCE
																	  types(5)