2.9BSD/usr/man/cat5/types.5

TYPES(5)            UNIX Programmer's Manual             TYPES(5)

NAME
     types - primitive system data types

SYNOPSIS
     #include <sys/types.h>

DESCRIPTION
     The data types defined in the include file are used in UNIX
     system code; some data of these types are accessible to user
     code:

     typedef char           bool_t;     /* Boolean */
     typedef char *         caddr_t;    /* virtual core address */
     typedef unsigned short comp_t;     /* "floating pt": 3 bits base 8 exp, 13 bits fraction */
     typedef long           daddr_t;    /* disk address */
     typedef short          dev_t;      /* device code */
     typedef unsigned short ino_t;      /* i-node number */
     #ifdef  MENLO_KOV
     typedef short          label_t[7]; /* regs 2-7 and __ovno */
     #else
     typedef short          label_t[6]; /* program status */
     #endif
     typedef unsigned       memaddr;    /* core or swap address */
     typedef long           off_t;      /* offset in file */
     typedef struct {short r[1];}*      physadr;
     typedef unsigned       size_t;     /* size of process segments */
     typedef long           time_t;     /* a time */
     typedef long           ubadr_t;    /* UNIBUS address */
     typedef unsigned short u_short;
     typedef short          void;

             /* selectors and constructor for device code */
     #define major(x)       (short)(((unsigned)(x)>>8))
     #define minor(x)       (short)((x)&0377)
     #define makedev(x,y)   (dev_t)((x)<<8|(y))

     The form _d_a_d_d_r__t is used for disk addresses except in an i-
     node on disk, see _f_i_l_s_y_s(5).  Times are encoded in seconds
     since 00:00:00 GMT, January 1, 1970.  The major and minor
     parts of a device code specify kind and unit number of a
     device and are installation-dependent.  Offsets (_o_f_f__t) are
     measured in bytes from the beginning of a file.  The _l_a_b_e_l__t
     variables are used to save the processor state while another
     process is running.

SEE ALSO
     adb(1), lseek(2), time(2), filsys(5)

Printed 5/17/83                                                 1