V10/man/man2/acct.2

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.TH ACCT 2
.CT 2 sa
.SH NAME
acct \(mi turn accounting on or off
.SH SYNOPSIS
.nf
.B int acct(file)
.B char *file;
.fi
.SH DESCRIPTION
.IR Acct ,
with a null-terminated string naming an existing file
as argument, turns on accounting;
records for each terminating process are appended to
.IR file .
An argument of
.L
(char *)0
causes accounting to be turned off.
.PP
.I Acct
may only be invoked by the super-user.
.PP
The accounting file format is given in
.IR acct (5).
.SH "SEE ALSO"
.IR acct (5), 
.IR sa (8)
.SH DIAGNOSTICS
.B EACCES
(file not a regular file),
.B EBUSY
(accounting already turned on),
.BR EFAULT ,
.BR EIO ,
.BR ELOOP ,
.BR ENOENT ,
.BR ENOTDIR ,
.BR EPERM ,
.BR EROFS ,
.BR ETXTBSY
.SH BUGS
No accounting is produced for programs running
when a crash occurs.
In particular nonterminating programs are never
accounted for.