1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)acct.2 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libc/sys/acct.2,v 1.6.2.5 2004/04/17 10:04:10 brueffer Exp $ 34.\" $DragonFly: src/lib/libc/sys/acct.2,v 1.4 2006/05/26 19:39:37 swildner Exp $ 35.\" 36.Dd April 17, 2004 37.Dt ACCT 2 38.Os 39.Sh NAME 40.Nm acct 41.Nd enable or disable process accounting 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In unistd.h 46.Ft int 47.Fn acct "const char *file" 48.Sh DESCRIPTION 49The 50.Fn acct 51call enables or disables the collection of system accounting 52records. 53If the argument 54.Fa file 55is a nil pointer, accounting is disabled. 56If 57.Fa file 58is an 59.Em existing 60pathname (null-terminated), record collection is enabled and for 61every process initiated which terminates under normal 62conditions an accounting record is appended to 63.Fa file . 64Abnormal conditions of termination are reboots 65or other fatal system problems. 66Records for processes which never terminate can not be 67produced by 68.Fn acct . 69.Pp 70For more information on the record structure used by 71.Fn acct , 72see 73.In sys/acct.h 74and 75.Xr acct 5 . 76.Pp 77This call is permitted only to the super-user. 78.Sh NOTES 79Accounting is automatically disabled when the file system the 80accounting file resides on runs out of space; it is enabled when 81space once again becomes available. 82The values controlling this behaviour can be modified using the following 83.Xr sysctl 8 84variables: 85.Bl -tag -width ".Va kern.acct_chkfreq" 86.It Va kern.acct_chkfreq 87Specifies the frequency (in seconds) with which free disk 88space should be checked. 89.It Va kern.acct_resume 90The percentage of free disk space above which process 91accounting will resume. 92.It Va kern.acct_suspend 93The percentage of free disk space below which process 94accounting will suspend. 95.El 96.Sh RETURN VALUES 97On error -1 is returned. 98The file must exist and the call may be exercised only by the super-user. 99.Sh ERRORS 100.Fn Acct 101will fail if one of the following is true: 102.Bl -tag -width Er 103.It Bq Er EPERM 104The caller is not the super-user. 105.It Bq Er ENOTDIR 106A component of the path prefix is not a directory. 107.It Bq Er ENAMETOOLONG 108A component of a pathname exceeded 255 characters, 109or an entire path name exceeded 1023 characters. 110.It Bq Er ENOENT 111The named file does not exist. 112.It Bq Er EACCES 113Search permission is denied for a component of the path prefix, 114or the path name is not a regular file. 115.It Bq Er ELOOP 116Too many symbolic links were encountered in translating the pathname. 117.It Bq Er EROFS 118The named file resides on a read-only file system. 119.It Bq Er EFAULT 120.Fa File 121points outside the process's allocated address space. 122.It Bq Er EIO 123An I/O error occurred while reading from or writing to the file system. 124.El 125.Sh SEE ALSO 126.Xr acct 5 , 127.Xr accton 8 , 128.Xr sa 8 129.Sh HISTORY 130An 131.Fn acct 132function call appeared in 133.At v7 . 134