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NetBSD 6.1.5 - man page for acct (netbsd section 2)

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ACCT(2) 			     BSD 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() call enables or disables the collection of system accounting records.  If file is
     NULL, accounting is disabled.  If file is an existing, NUL-terminated, pathname, record col-
     lection is enabled, and for every process initiated which terminates under normal conditions
     an accounting record is appended to file.	Abnormal conditions of termination are reboots or
     other fatal system problems.  Records for processes which never terminate can not be pro-
     duced by acct().

     For more information on the record structure used by acct(), see /usr/include/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.	For this purpose,
     acct() creates a kernel thread called ``acctwatch''.

RETURN VALUES
     On success, zero is returned.  Otherwise, -1 is returned and errno is set to indicate the
     error.

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

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

     [EFAULT]		file points outside the process's allocated address space.

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

     [ELOOP]		Too many symbolic links were encountered in translating the pathname.

     [ENAMETOOLONG]	A component of a pathname exceeded {NAME_MAX} characters, or an entire
			path name exceeded {PATH_MAX} characters.

     [ENOENT]		The named file does not exist.

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

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

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

     Also, acct() fails if failed to create kernel thread described above.  See fork(2) for errno
     value.

SEE ALSO
     fork(2), acct(5), sa(8)

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

BSD					   June 4, 1993 				      BSD
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