acct(2)

NAME
   acct -- enable or disable process accounting

SYNOPSIS
   #include <unistd.h>

   int
   acct(const char *file);

DESCRIPTION
   The acct() call enables or disables the collection of system accounting
   records.  If the argument file is a nil pointer, accounting is disabled.
   If file is an existing pathname (null-terminated), record collection is
   enabled and for every process initiated which terminates under normal
   conditions an accounting record is appended to file.  Abnormal conditions
   of termination are reboots or other fatal system problems.  Records for
   processes which never terminate can not be produced by acct().

   For more information on the record structure used by acct(), see
   /usr/include/sys/acct.h and acct(5).

   This call is permitted only to the super-user.

NOTES
   Accounting is automatically disabled when the file system the accounting
   file resides on runs out of space; it is enabled when space once again
   becomes available.