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acct - enable or disable process accounting



      acct - enable or disable process accounting


      Standard C Library (libc, -lc)


      #include <unistd.h>
      acct(const char *file);


      The acct() system call enables or disables the collection of system
      accounting records.  If the argument file is a null 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.  Abnor‐
      mal conditions of termination are reboots or other fatal system problems.
      Records for processes which never terminate cannot be produced by acct().
      For more information on the record structure used by acct(), see #include
      and acct(5).
      This call is permitted only to the super-user.


      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.  The values controlling this behaviour can be modified
      using the following sysctl(8) variables:
      kern.acct_chkfreq  Specifies the frequency (in seconds) with which free
                         disk space should be checked.
      kern.acct_resume   The percentage of free disk space above which process
                         accounting will resume.
      kern.acct_suspend  The percentage of free disk space below which process
                         accounting will suspend.
      On error -1 is returned.  The file must exist and the call may be exer‐
      cised only by the super-user.


      The acct() system call will fail if one of the following is true:
      [EPERM]            The caller is not the super-user.
      [ENOTDIR]          A component of the path prefix is not a directory.
      [ENAMETOOLONG]     A component of a pathname exceeded 255 characters, or
                         an entire path name exceeded 1023 characters.
      [ENOENT]           The named file does not exist.
      [EACCES]           Search permission is denied for a component of the
                         path prefix, or the path name is not a regular file.
      [ELOOP]            Too many symbolic links were encountered in translat‐
                         ing the pathname.
      [EROFS]            The named file resides on a read-only file system.
      [EFAULT]           The file argument points outside the process’s allo‐
                         cated address space.
      [EIO]              An I/O error occurred while reading from or writing to
                         the file system.
      acct(5), accton(8), sa(8)


      The acct() function appeared in Version 7 AT&T UNIX.


Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.