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:

typedeflongdaddr_t;
typedefchar *caddr_t;
typedeflongmem_t;
typedefunsigned shortino_t;
typedeflongtime_t;
typedeflonglabel_t[13];/* regs d2-d7, a2-a7, pc */
typedefshortdev_t;
typedeflongoff_t;
 /* selectors and constructor for device code */
 #definemajor(x)  (int)(((unsigned)(x) >> 8))
#defineminor(x) (int)(x) & 0377)
#definemakedev(x,y)(dev_t)((x) << 8|(y))

The form daddr_t is used for disk addresses except in an i-node on disk, see filsys(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 label_t variables are used to save the processor state while another process is running. 

SEE ALSO

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

7th Edition