4BSD/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  struct _physadr { int r[1]; } *physadr;
     typedef  long              daddr_t;
     typedef  char *            caddr_t;
     typedef  unsigned short    ino_t;
     typedef  int               swblk_t;
     typedef  int               size_t;
     typedef  long              time_t;
     typedef  long              label_t[14];
     typedef  short             dev_t;
     typedef  long              off_t;

     typedef  unsigned char     u_char;
     typedef  unsigned short    u_short;
     typedef  unsigned int      u_int;
     typedef  unsigned long     u_long;

     /* major part of a device */
     #define  major(x)  ((int)(((unsigned)(x)>>8)&0377))

     /* minor part of a device */
     #define  minor(x)  ((int)((x)&0377))

     /* make a device number */
     #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 are measured
     in bytes from the beginning of a file.  The _l_a_b_e_l__t vari-
     ables are used to save the processor state while another
     process is running.

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








Printed 11/10/80                                                1