acct man page on HP-UX

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acct(4)								       acct(4)

       acct - per-process accounting file format

       Files produced as a result of calling (see acct(2)) have records in the
       form defined by whose contents are:

	      typedef ushort comp_t; /* "floating point":
					     13-bit fraction, 3-bit exponent */
	      struct  acct {
		  char	  ac_flag;	  /* Accounting flag */
		  char	  ac_stat;	  /* Exit status */
		  uid_t	  ac_uid;	  /* Accounting user ID */
		  gid_t	  ac_gid;	  /* Accounting group ID */
		  dev_t	  ac_tty;	  /* control typewriter */
		  time_t  ac_btime;	  /* Beginning time */
		  comp_t  ac_utime;	  /* acctng user time in clock ticks */
		  comp_t  ac_stime;	  /* acctng system time in clock ticks */
		  comp_t  ac_etime;	  /* acctng elapsed time in clock ticks */
		  comp_t  ac_mem;	  /* memory usage in clicks */
		  comp_t  ac_io;	  /* chars trnsfrd by read/write */
		  comp_t  ac_rw;	  /* number of block reads/writes */
		  char	  ac_comm[8];	  /* command name */
	      #define AFORK   01	  /* has executed fork, but no exec */
	      #define ASU     02	  /* used super-user privileges */
	      #define ACCTF   0300	  /* record type: 00 = acct */

       In the flag is turned on by each and turned off by an (see fork(2)  and
       exec(2)).   The field is inherited from the parent process and is reset
       by any Each time the system charges the process with a clock  tick,  it
       also adds to the current process size, computed as follows:

	      (data size) + (text size) + (number of in-core processes sharing text) +
	      sum of ((shared memory segment size) / (number of in-core processes attached to segment))

       For  systems  with  virtual  memory,  the text, data, and shared memory
       sizes refer to the resident portion of the memory segments.  The	 value
       of can be viewed as an approximation to the mean process size, as modi‐
       fied by text-sharing.

       The structure, which resides with the source files  of  the  accounting
       commands,  represents  the  total accounting format used by the various
       accounting commands:

       The value for a short-lived command gives little information about  the
       actual size of the command because can be incremented while a different
       command (such as the shell) is being executed by the process.

       Kernel internal structures may change from release to  release  without
       warning.	  Applications	directly  relying  on these structures are not

       Accounting files are currently written in 32-bit format.	 Thus,	64-bit
       applications  which read the files need to make special provisions.  In
       particular, the header declares the field as rather than	 a  in	64-bit
       compilations.   The  field  should be cast to in the application before
       using it (e.g., in calls to date conversion functions).	The accounting
       file format will be changed to a 64-bit layout at a future release.

       acct(2), acct(1M), acctcom(1M), exec(2), fork(2).


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