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ACCT(2)			  FreeBSD System Calls Manual		       ACCT(2)

NAME
     acct -- enable or disable process accounting

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     acct(const	char *file);

DESCRIPTION
     The acct()	system call enables or disables	the collection of system
     accounting	records.  If the argument file is a null pointer, accounting
     is	disabled.  If file is an existing pathname (null-terminated), record
     collection	is enabled and for every process initiated which terminates
     under normal conditions an	accounting record is appended to file.	Abnor-
     mal conditions of termination are reboots or other	fatal system problems.
     Records for processes which never terminate cannot	be produced by acct().

     For more information on the record	structure used by acct(), see
     <sys/acct.h> and acct(5).

     This call is permitted only to the	super-user.

NOTES
     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.	 The values controlling	this behaviour can be modified
     using the following sysctl(8) variables:

     kern.acct_chkfreq	Specifies the frequency	(in seconds) with which	free
			disk space should be checked.

     kern.acct_resume	The percentage of free disk space above	which process
			accounting will	resume.

     kern.acct_suspend	The percentage of free disk space below	which process
			accounting will	suspend.

RETURN VALUES
     On	error -1 is returned.  The file	must exist and the call	may be exer-
     cised only	by the super-user.

ERRORS
     The acct()	system call will fail if one of	the following is true:

     [EPERM]		The caller is not the super-user.

     [ENOTDIR]		A component of the path	prefix is not a	directory.

     [ENAMETOOLONG]	A component of a pathname exceeded 255 characters, or
			an entire path name exceeded 1023 characters.

     [ENOENT]		The named file does not	exist.

     [EACCES]		Search permission is denied for	a component of the
			path prefix, or	the path name is not a regular file.

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing the	pathname.

     [EROFS]		The named file resides on a read-only file system.

     [EFAULT]		The file argument points outside the process's allo-
			cated address space.

     [EIO]		An I/O error occurred while reading from or writing to
			the file system.

SEE ALSO
     acct(5), accton(8), sa(8)

HISTORY
     The acct()	function appeared in Version 7 AT&T UNIX.

FreeBSD	9.2			April 17, 2004			   FreeBSD 9.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | NOTES | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

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