Note that this system call now creates kernel thread.

lib/libc/sys/acct.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: acct.2,v 1.9 1999/12/02 21:42:36 kleink Exp $
+.\"	$NetBSD: acct.2,v 1.10 2000/03/10 01:34:35 enami Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -79,6 +79,10 @@ This call is permitted only to the super-user.
 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.
+For this purpose,
+.Fn acct
+creates a kernel thread called
+.Dq acctwatch .
 .Sh RETURN VALUES
 On error -1 is returned.
 The file must exist and the call may be exercised only by the super-user.
@@ -111,7 +115,16 @@ points outside the process's allocated address space.
 .It Bq Er EIO
 An I/O error occurred while reading from or writing to the file system.
 .El
+Also,
+.Fn acct
+fails if failed to create kernel thread described above.
+See
+.Xr fork 2
+for
+.Va errno
+value.
 .Sh SEE ALSO
+.Xr fork 2 ,
 .Xr acct 5 ,
 .Xr sa 8
 .Sh HISTORY