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