1.\" $NetBSD: acct.2,v 1.19 2010/05/31 12:16:20 njoly Exp $ 2.\" 3.\" Copyright (c) 1980, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)acct.2 8.1 (Berkeley) 6/4/93 31.\" 32.Dd June 4, 1993 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 records. 48If 49.Fa file 50is 51.Dv NULL , 52accounting is disabled. 53If 54.Fa file 55is an existing, NUL-terminated, pathname, record collection is enabled, 56and for every process initiated which terminates under normal 57conditions an accounting record is appended to 58.Fa file . 59Abnormal conditions of termination are reboots or other fatal system problems. 60Records for processes which never terminate can not be 61produced by 62.Fn acct . 63.Pp 64For more information on the record structure used by 65.Fn acct , 66see 67.Pa /usr/include/sys/acct.h 68and 69.Xr acct 5 . 70.Pp 71This call is permitted only to the super-user. 72.Sh NOTES 73Accounting is automatically disabled when the file system the 74accounting file resides on runs out of space; it is enabled when 75space once again becomes available. 76For this purpose, 77.Fn acct 78creates a kernel thread called 79.Dq acctwatch . 80.Sh RETURN VALUES 81On success, zero is returned. 82Otherwise, \-1 is returned and 83.Va errno 84is set to indicate the error. 85.Sh ERRORS 86.Fn acct 87will fail if one of the following is true: 88.Bl -tag -width Er 89.It Bq Er EACCES 90Search permission is denied for a component of the path prefix, 91or the path name is not a regular file. 92.It Bq Er EFAULT 93.Fa file 94points outside the process's allocated address space. 95.It Bq Er EIO 96An I/O error occurred while reading from or writing to the file system. 97.It Bq Er ELOOP 98Too many symbolic links were encountered in translating the pathname. 99.It Bq Er ENAMETOOLONG 100A component of a pathname exceeded 101.Brq Dv NAME_MAX 102characters, or an entire path name exceeded 103.Brq Dv PATH_MAX 104characters. 105.It Bq Er ENOENT 106The named file does not exist. 107.It Bq Er ENOTDIR 108A component of the path prefix is not a directory. 109.It Bq Er EPERM 110The caller is not the super-user. 111.It Bq Er EROFS 112The named file resides on a read-only file system. 113.El 114.Pp 115Also, 116.Fn acct 117fails if failed to create kernel thread described above. 118See 119.Xr fork 2 120for 121.Va errno 122value. 123.Sh SEE ALSO 124.Xr fork 2 , 125.Xr acct 5 , 126.Xr sa 8 127.Sh HISTORY 128An 129.Fn acct 130function call appeared in 131.At v7 . 132