* Copyright (c) 1989 The Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)getloadavg.c 6.2 (Berkeley) 6/29/90";
#endif /* LIBC_SCCS and not lint */
static struct nlist nl
[] = {
* getloadavg() -- Get system load averages.
* Put `nelem' samples into `loadavg' array.
* Return number of samples retrieved, or -1 on error.
getloadavg(loadavg
, nelem
)
static int need_nlist
= 1;
if ((alreadyopen
= kvm_openfiles(NULL
, NULL
, NULL
)) == -1)
if (kvm_read((off_t
)nl
[X_AVERUNNABLE
].n_value
, (char *)averunnable
,
sizeof(averunnable
)) != sizeof(averunnable
))
if (kvm_read( (off_t
)nl
[X_FSCALE
].n_value
, (char *)&fscale
,
sizeof(fscale
)) != sizeof(fscale
))
nelem
= MIN(nelem
, sizeof(averunnable
) / sizeof(averunnable
[0]));
for (i
= 0; i
< nelem
; i
++)
loadavg
[i
] = (double) averunnable
[i
] / fscale
;