Reading binary data

[David M]

Thanks but the C Struct describing the data doesn't match up with the
list on the module-struct page.

this is the acct.h file

#ifndef _SYS_ACCT_H
#define _SYS_ACCT_H	1

#include <features.h>

#define	__need_time_t
#include <time.h>
#include <sys/types.h>

__BEGIN_DECLS

#define ACCT_COMM 16

/*
  comp_t is a 16-bit "floating" point number with a 3-bit base 8
  exponent and a 13-bit fraction. See linux/kernel/acct.c for the
  specific encoding system used.
*/

typedef u_int16_t comp_t;

struct acct
  {
    char ac_flag;			/* Accounting flags.  */
    u_int16_t ac_uid;			/* Accounting user ID.  */
    u_int16_t ac_gid;			/* Accounting group ID.  */
    u_int16_t ac_tty;			/* Controlling tty.  */
    u_int32_t ac_btime;			/* Beginning time.  */
    comp_t ac_utime;			/* Accounting user time.  */
    comp_t ac_stime;			/* Accounting system time.  */
    comp_t ac_etime;			/* Accounting elapsed time.  */
    comp_t ac_mem;			/* Accounting average memory usage.  */
    comp_t ac_io;			/* Accounting chars transferred.  */
    comp_t ac_rw;			/* Accounting blocks read or written.  */
    comp_t ac_minflt;			/* Accounting minor pagefaults.  */
    comp_t ac_majflt;			/* Accounting major pagefaults.  */
    comp_t ac_swaps;			/* Accounting number of swaps.  */
    u_int32_t ac_exitcode;		/* Accounting process exitcode.  */
    char ac_comm[ACCT_COMM+1];		/* Accounting command name.  */
    char ac_pad[10];			/* Accounting padding bytes.  */
  };

enum
  {
    AFORK = 0x01,		/* Has executed fork, but no exec.  */
    ASU = 0x02,			/* Used super-user privileges.  */
    ACORE = 0x08,		/* Dumped core.  */
    AXSIG = 0x10		/* Killed by a signal.  */
  };

#define AHZ     100


/* Switch process accounting on and off.  */
extern int acct (__const char *__filename) __THROW;

__END_DECLS

#endif	/* sys/acct.h */

What are u_ini16_t and comp_t?  And what about the enum section?