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ACCT(2)                  DragonFly System Calls Manual                 ACCT(2)


NAME

     acct -- enable or disable process accounting


LIBRARY

     Standard C Library (libc, -lc)


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 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.  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
     <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.  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.


RETURN VALUES

     On error -1 is returned.  The file must exist and the call may be
     exercised only by the super-user.


ERRORS

     Acct() 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
                        translating the pathname.

     [EROFS]            The named file resides on a read-only file system.

     [EFAULT]           File points outside the process's allocated address
                        space.

     [EIO]              An I/O error occurred while reading from or writing to
                        the file system.


SEE ALSO

     acct(5), accton(8), sa(8)


HISTORY

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

DragonFly 5.1                   April 17, 2004                   DragonFly 5.1

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