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author | Ton Voon <tonvoon@users.sourceforge.net> | 2007-01-24 22:47:25 +0000 |
---|---|---|
committer | Ton Voon <tonvoon@users.sourceforge.net> | 2007-01-24 22:47:25 +0000 |
commit | fe856aa957978504137c1d425815d4ed8a22be40 (patch) | |
tree | a5bb46ce0e64b2056f75700eadbf27aba7c39418 /lib/getloadavg.c | |
parent | 210f39bc84cfbb21cd72dc054e43f13815ee0616 (diff) | |
download | monitoring-plugins-fe856aa957978504137c1d425815d4ed8a22be40.tar.gz |
Sync with gnulib - lots of extraneous code removed in preference to GNU code
git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1580 f882894a-f735-0410-b71e-b25c423dba1c
Diffstat (limited to 'lib/getloadavg.c')
-rw-r--r-- | lib/getloadavg.c | 1017 |
1 files changed, 0 insertions, 1017 deletions
diff --git a/lib/getloadavg.c b/lib/getloadavg.c deleted file mode 100644 index 2a501314..00000000 --- a/lib/getloadavg.c +++ /dev/null | |||
@@ -1,1017 +0,0 @@ | |||
1 | /* Get the system load averages. | ||
2 | |||
3 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, | ||
4 | 1995, 1997, 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc. | ||
5 | |||
6 | NOTE: The canonical source of this file is maintained with gnulib. | ||
7 | Bugs can be reported to bug-gnulib@gnu.org. | ||
8 | |||
9 | This program is free software; you can redistribute it and/or modify | ||
10 | it under the terms of the GNU General Public License as published by | ||
11 | the Free Software Foundation; either version 2, or (at your option) | ||
12 | any later version. | ||
13 | |||
14 | This program is distributed in the hope that it will be useful, | ||
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | GNU General Public License for more details. | ||
18 | |||
19 | You should have received a copy of the GNU General Public License | ||
20 | along with this program; if not, write to the Free Software | ||
21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | ||
22 | USA. */ | ||
23 | |||
24 | /* Compile-time symbols that this file uses: | ||
25 | |||
26 | HAVE_PSTAT_GETDYNAMIC Define this if your system has the | ||
27 | pstat_getdynamic function. I think it | ||
28 | is unique to HPUX9. The best way to get the | ||
29 | definition is through the AC_FUNC_GETLOADAVG | ||
30 | macro that comes with autoconf 2.13 or newer. | ||
31 | If that isn't an option, then just put | ||
32 | AC_CHECK_FUNCS(pstat_getdynamic) in your | ||
33 | configure.in file. | ||
34 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. | ||
35 | KERNEL_FILE Name of the kernel file to nlist. | ||
36 | LDAV_CVT() Scale the load average from the kernel. | ||
37 | Returns a double. | ||
38 | LDAV_SYMBOL Name of kernel symbol giving load average. | ||
39 | LOAD_AVE_TYPE Type of the load average array in the kernel. | ||
40 | Must be defined unless one of | ||
41 | apollo, DGUX, NeXT, or UMAX is defined; | ||
42 | or we have libkstat; | ||
43 | otherwise, no load average is available. | ||
44 | HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults | ||
45 | to this. | ||
46 | NLIST_STRUCT Include nlist.h, not a.out.h, and | ||
47 | the nlist n_name element is a pointer, | ||
48 | not an array. | ||
49 | HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'. | ||
50 | LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing | ||
51 | load averages. | ||
52 | |||
53 | Specific system predefines this file uses, aside from setting | ||
54 | default values if not emacs: | ||
55 | |||
56 | apollo | ||
57 | BSD Real BSD, not just BSD-like. | ||
58 | convex | ||
59 | DGUX | ||
60 | eunice UNIX emulator under VMS. | ||
61 | hpux | ||
62 | __MSDOS__ No-op for MSDOS. | ||
63 | NeXT | ||
64 | sgi | ||
65 | sequent Sequent Dynix 3.x.x (BSD) | ||
66 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | ||
67 | sony_news NEWS-OS (works at least for 4.1C) | ||
68 | UMAX | ||
69 | UMAX4_3 | ||
70 | VMS | ||
71 | WINDOWS32 No-op for Windows95/NT. | ||
72 | __linux__ Linux: assumes /proc file system mounted. | ||
73 | Support from Michael K. Johnson. | ||
74 | __CYGWIN__ Cygwin emulates linux /proc/loadavg. | ||
75 | __NetBSD__ NetBSD: assumes /kern file system mounted. | ||
76 | |||
77 | In addition, to avoid nesting many #ifdefs, we internally set | ||
78 | LDAV_DONE to indicate that the load average has been computed. | ||
79 | |||
80 | We also #define LDAV_PRIVILEGED if a program will require | ||
81 | special installation to be able to call getloadavg. */ | ||
82 | |||
83 | /* This should always be first. */ | ||
84 | #ifdef HAVE_CONFIG_H | ||
85 | # include <config.h> | ||
86 | #endif | ||
87 | |||
88 | #include <errno.h> | ||
89 | #include <stdbool.h> | ||
90 | #include <stdio.h> | ||
91 | #include <stdlib.h> | ||
92 | |||
93 | /* Exclude all the code except the test program at the end | ||
94 | if the system has its own `getloadavg' function. */ | ||
95 | |||
96 | #ifndef HAVE_GETLOADAVG | ||
97 | |||
98 | # include <sys/types.h> | ||
99 | |||
100 | /* Both the Emacs and non-Emacs sections want this. Some | ||
101 | configuration files' definitions for the LOAD_AVE_CVT macro (like | ||
102 | sparc.h's) use macros like FSCALE, defined here. */ | ||
103 | # if defined (unix) || defined (__unix) | ||
104 | # include <sys/param.h> | ||
105 | # endif | ||
106 | |||
107 | # include "c-strtod.h" | ||
108 | # include "cloexec.h" | ||
109 | # include "intprops.h" | ||
110 | # include "xalloc.h" | ||
111 | |||
112 | /* The existing Emacs configuration files define a macro called | ||
113 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | ||
114 | returns the load average multiplied by 100. What we actually want | ||
115 | is a macro called LDAV_CVT, which returns the load average as an | ||
116 | unmultiplied double. | ||
117 | |||
118 | For backwards compatibility, we'll define LDAV_CVT in terms of | ||
119 | LOAD_AVE_CVT, but future machine config files should just define | ||
120 | LDAV_CVT directly. */ | ||
121 | |||
122 | # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT) | ||
123 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | ||
124 | # endif | ||
125 | |||
126 | # if !defined (BSD) && defined (ultrix) | ||
127 | /* Ultrix behaves like BSD on Vaxen. */ | ||
128 | # define BSD | ||
129 | # endif | ||
130 | |||
131 | # ifdef NeXT | ||
132 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | ||
133 | conflicts with the definition understood in this file, that this | ||
134 | really is BSD. */ | ||
135 | # undef BSD | ||
136 | |||
137 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | ||
138 | defined to mean that the nlist method should be used, which is not true. */ | ||
139 | # undef FSCALE | ||
140 | # endif | ||
141 | |||
142 | /* Same issues as for NeXT apply to the HURD-based GNU system. */ | ||
143 | # ifdef __GNU__ | ||
144 | # undef BSD | ||
145 | # undef FSCALE | ||
146 | # endif /* __GNU__ */ | ||
147 | |||
148 | /* Set values that are different from the defaults, which are | ||
149 | set a little farther down with #ifndef. */ | ||
150 | |||
151 | |||
152 | /* Some shorthands. */ | ||
153 | |||
154 | # if defined (HPUX) && !defined (hpux) | ||
155 | # define hpux | ||
156 | # endif | ||
157 | |||
158 | # if defined (__hpux) && !defined (hpux) | ||
159 | # define hpux | ||
160 | # endif | ||
161 | |||
162 | # if defined (__sun) && !defined (sun) | ||
163 | # define sun | ||
164 | # endif | ||
165 | |||
166 | # if defined (hp300) && !defined (hpux) | ||
167 | # define MORE_BSD | ||
168 | # endif | ||
169 | |||
170 | # if defined (ultrix) && defined (mips) | ||
171 | # define decstation | ||
172 | # endif | ||
173 | |||
174 | # if defined (__SVR4) && !defined (SVR4) | ||
175 | # define SVR4 | ||
176 | # endif | ||
177 | |||
178 | # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2) | ||
179 | # define SUNOS_5 | ||
180 | # endif | ||
181 | |||
182 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) | ||
183 | # define OSF_ALPHA | ||
184 | # include <sys/mbuf.h> | ||
185 | # include <sys/socket.h> | ||
186 | # include <net/route.h> | ||
187 | # include <sys/table.h> | ||
188 | # endif | ||
189 | |||
190 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | ||
191 | # define OSF_MIPS | ||
192 | # include <sys/table.h> | ||
193 | # endif | ||
194 | |||
195 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | ||
196 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | ||
197 | that with a couple of other things and we'll have a unique match. */ | ||
198 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | ||
199 | # define tek4300 /* Define by emacs, but not by other users. */ | ||
200 | # endif | ||
201 | |||
202 | |||
203 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ | ||
204 | # ifndef LOAD_AVE_TYPE | ||
205 | |||
206 | # ifdef MORE_BSD | ||
207 | # define LOAD_AVE_TYPE long | ||
208 | # endif | ||
209 | |||
210 | # ifdef sun | ||
211 | # define LOAD_AVE_TYPE long | ||
212 | # endif | ||
213 | |||
214 | # ifdef decstation | ||
215 | # define LOAD_AVE_TYPE long | ||
216 | # endif | ||
217 | |||
218 | # ifdef _SEQUENT_ | ||
219 | # define LOAD_AVE_TYPE long | ||
220 | # endif | ||
221 | |||
222 | # ifdef sgi | ||
223 | # define LOAD_AVE_TYPE long | ||
224 | # endif | ||
225 | |||
226 | # ifdef SVR4 | ||
227 | # define LOAD_AVE_TYPE long | ||
228 | # endif | ||
229 | |||
230 | # ifdef sony_news | ||
231 | # define LOAD_AVE_TYPE long | ||
232 | # endif | ||
233 | |||
234 | # ifdef sequent | ||
235 | # define LOAD_AVE_TYPE long | ||
236 | # endif | ||
237 | |||
238 | # ifdef OSF_ALPHA | ||
239 | # define LOAD_AVE_TYPE long | ||
240 | # endif | ||
241 | |||
242 | # if defined (ardent) && defined (titan) | ||
243 | # define LOAD_AVE_TYPE long | ||
244 | # endif | ||
245 | |||
246 | # ifdef tek4300 | ||
247 | # define LOAD_AVE_TYPE long | ||
248 | # endif | ||
249 | |||
250 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ | ||
251 | # define LOAD_AVE_TYPE long | ||
252 | # endif | ||
253 | |||
254 | # ifdef _AIX | ||
255 | # define LOAD_AVE_TYPE long | ||
256 | # endif | ||
257 | |||
258 | # ifdef convex | ||
259 | # define LOAD_AVE_TYPE double | ||
260 | # ifndef LDAV_CVT | ||
261 | # define LDAV_CVT(n) (n) | ||
262 | # endif | ||
263 | # endif | ||
264 | |||
265 | # endif /* No LOAD_AVE_TYPE. */ | ||
266 | |||
267 | # ifdef OSF_ALPHA | ||
268 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, | ||
269 | according to ghazi@noc.rutgers.edu. */ | ||
270 | # undef FSCALE | ||
271 | # define FSCALE 1024.0 | ||
272 | # endif | ||
273 | |||
274 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ | ||
275 | /* <sys/param.h> defines an incorrect value for FSCALE on an | ||
276 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | ||
277 | # undef FSCALE | ||
278 | # define FSCALE 100.0 | ||
279 | # endif | ||
280 | |||
281 | |||
282 | # ifndef FSCALE | ||
283 | |||
284 | /* SunOS and some others define FSCALE in sys/param.h. */ | ||
285 | |||
286 | # ifdef MORE_BSD | ||
287 | # define FSCALE 2048.0 | ||
288 | # endif | ||
289 | |||
290 | # if defined (MIPS) || defined (SVR4) || defined (decstation) | ||
291 | # define FSCALE 256 | ||
292 | # endif | ||
293 | |||
294 | # if defined (sgi) || defined (sequent) | ||
295 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined | ||
296 | above under #ifdef MIPS. But we want the sgi value. */ | ||
297 | # undef FSCALE | ||
298 | # define FSCALE 1000.0 | ||
299 | # endif | ||
300 | |||
301 | # if defined (ardent) && defined (titan) | ||
302 | # define FSCALE 65536.0 | ||
303 | # endif | ||
304 | |||
305 | # ifdef tek4300 | ||
306 | # define FSCALE 100.0 | ||
307 | # endif | ||
308 | |||
309 | # ifdef _AIX | ||
310 | # define FSCALE 65536.0 | ||
311 | # endif | ||
312 | |||
313 | # endif /* Not FSCALE. */ | ||
314 | |||
315 | # if !defined (LDAV_CVT) && defined (FSCALE) | ||
316 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) | ||
317 | # endif | ||
318 | |||
319 | # ifndef NLIST_STRUCT | ||
320 | # if HAVE_NLIST_H | ||
321 | # define NLIST_STRUCT | ||
322 | # endif | ||
323 | # endif | ||
324 | |||
325 | # if defined (sgi) || (defined (mips) && !defined (BSD)) | ||
326 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | ||
327 | # endif | ||
328 | |||
329 | |||
330 | # if !defined (KERNEL_FILE) && defined (sequent) | ||
331 | # define KERNEL_FILE "/dynix" | ||
332 | # endif | ||
333 | |||
334 | # if !defined (KERNEL_FILE) && defined (hpux) | ||
335 | # define KERNEL_FILE "/hp-ux" | ||
336 | # endif | ||
337 | |||
338 | # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) | ||
339 | # define KERNEL_FILE "/unix" | ||
340 | # endif | ||
341 | |||
342 | |||
343 | # if !defined (LDAV_SYMBOL) && defined (alliant) | ||
344 | # define LDAV_SYMBOL "_Loadavg" | ||
345 | # endif | ||
346 | |||
347 | # if !defined (LDAV_SYMBOL) && ((defined (hpux) && !defined (hp9000s300)) || defined (_SEQUENT_) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) | ||
348 | # define LDAV_SYMBOL "avenrun" | ||
349 | # endif | ||
350 | |||
351 | # include <unistd.h> | ||
352 | |||
353 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | ||
354 | nlist method. */ | ||
355 | # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) | ||
356 | # define LOAD_AVE_TYPE double | ||
357 | # endif | ||
358 | |||
359 | # ifdef LOAD_AVE_TYPE | ||
360 | |||
361 | # ifndef VMS | ||
362 | # ifndef __linux__ | ||
363 | # ifndef NLIST_STRUCT | ||
364 | # include <a.out.h> | ||
365 | # else /* NLIST_STRUCT */ | ||
366 | # include <nlist.h> | ||
367 | # endif /* NLIST_STRUCT */ | ||
368 | |||
369 | # ifdef SUNOS_5 | ||
370 | # include <fcntl.h> | ||
371 | # include <kvm.h> | ||
372 | # include <kstat.h> | ||
373 | # endif | ||
374 | |||
375 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | ||
376 | # include <sys/pstat.h> | ||
377 | # endif | ||
378 | |||
379 | # ifndef KERNEL_FILE | ||
380 | # define KERNEL_FILE "/vmunix" | ||
381 | # endif /* KERNEL_FILE */ | ||
382 | |||
383 | # ifndef LDAV_SYMBOL | ||
384 | # define LDAV_SYMBOL "_avenrun" | ||
385 | # endif /* LDAV_SYMBOL */ | ||
386 | # endif /* __linux__ */ | ||
387 | |||
388 | # else /* VMS */ | ||
389 | |||
390 | # ifndef eunice | ||
391 | # include <iodef.h> | ||
392 | # include <descrip.h> | ||
393 | # else /* eunice */ | ||
394 | # include <vms/iodef.h> | ||
395 | # endif /* eunice */ | ||
396 | # endif /* VMS */ | ||
397 | |||
398 | # ifndef LDAV_CVT | ||
399 | # define LDAV_CVT(n) ((double) (n)) | ||
400 | # endif /* !LDAV_CVT */ | ||
401 | |||
402 | # endif /* LOAD_AVE_TYPE */ | ||
403 | |||
404 | # if defined (__GNU__) && !defined (NeXT) | ||
405 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ | ||
406 | /* GNU system acts much like NeXT, for load average purposes, | ||
407 | but not exactly. */ | ||
408 | # define NeXT | ||
409 | # define host_self mach_host_self | ||
410 | # endif | ||
411 | |||
412 | # ifdef NeXT | ||
413 | # ifdef HAVE_MACH_MACH_H | ||
414 | # include <mach/mach.h> | ||
415 | # else | ||
416 | # include <mach.h> | ||
417 | # endif | ||
418 | # endif /* NeXT */ | ||
419 | |||
420 | # ifdef sgi | ||
421 | # include <sys/sysmp.h> | ||
422 | # endif /* sgi */ | ||
423 | |||
424 | # ifdef UMAX | ||
425 | # include <signal.h> | ||
426 | # include <sys/time.h> | ||
427 | # include <sys/wait.h> | ||
428 | # include <sys/syscall.h> | ||
429 | |||
430 | # ifdef UMAX_43 | ||
431 | # include <machine/cpu.h> | ||
432 | # include <inq_stats/statistics.h> | ||
433 | # include <inq_stats/sysstats.h> | ||
434 | # include <inq_stats/cpustats.h> | ||
435 | # include <inq_stats/procstats.h> | ||
436 | # else /* Not UMAX_43. */ | ||
437 | # include <sys/sysdefs.h> | ||
438 | # include <sys/statistics.h> | ||
439 | # include <sys/sysstats.h> | ||
440 | # include <sys/cpudefs.h> | ||
441 | # include <sys/cpustats.h> | ||
442 | # include <sys/procstats.h> | ||
443 | # endif /* Not UMAX_43. */ | ||
444 | # endif /* UMAX */ | ||
445 | |||
446 | # ifdef DGUX | ||
447 | # include <sys/dg_sys_info.h> | ||
448 | # endif | ||
449 | |||
450 | # include "fcntl--.h" | ||
451 | |||
452 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | ||
453 | |||
454 | # ifdef NeXT | ||
455 | static processor_set_t default_set; | ||
456 | static bool getloadavg_initialized; | ||
457 | # endif /* NeXT */ | ||
458 | |||
459 | # ifdef UMAX | ||
460 | static unsigned int cpus = 0; | ||
461 | static unsigned int samples; | ||
462 | # endif /* UMAX */ | ||
463 | |||
464 | # ifdef DGUX | ||
465 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | ||
466 | # endif /* DGUX */ | ||
467 | |||
468 | # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE) | ||
469 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | ||
470 | static int channel; | ||
471 | /* True iff channel is valid. */ | ||
472 | static bool getloadavg_initialized; | ||
473 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | ||
474 | static long offset; | ||
475 | |||
476 | # if !defined (VMS) && !defined (sgi) && !defined (__linux__) | ||
477 | static struct nlist nl[2]; | ||
478 | # endif /* Not VMS or sgi */ | ||
479 | |||
480 | # ifdef SUNOS_5 | ||
481 | static kvm_t *kd; | ||
482 | # endif /* SUNOS_5 */ | ||
483 | |||
484 | # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ | ||
485 | |||
486 | /* Put the 1 minute, 5 minute and 15 minute load averages | ||
487 | into the first NELEM elements of LOADAVG. | ||
488 | Return the number written (never more than 3, but may be less than NELEM), | ||
489 | or -1 if an error occurred. */ | ||
490 | |||
491 | int | ||
492 | getloadavg (double loadavg[], int nelem) | ||
493 | { | ||
494 | int elem = 0; /* Return value. */ | ||
495 | |||
496 | # ifdef NO_GET_LOAD_AVG | ||
497 | # define LDAV_DONE | ||
498 | /* Set errno to zero to indicate that there was no particular error; | ||
499 | this function just can't work at all on this system. */ | ||
500 | errno = 0; | ||
501 | elem = -1; | ||
502 | # endif | ||
503 | |||
504 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) | ||
505 | /* Use libkstat because we don't have to be root. */ | ||
506 | # define LDAV_DONE | ||
507 | kstat_ctl_t *kc; | ||
508 | kstat_t *ksp; | ||
509 | kstat_named_t *kn; | ||
510 | |||
511 | kc = kstat_open (); | ||
512 | if (kc == 0) | ||
513 | return -1; | ||
514 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); | ||
515 | if (ksp == 0) | ||
516 | return -1; | ||
517 | if (kstat_read (kc, ksp, 0) == -1) | ||
518 | return -1; | ||
519 | |||
520 | |||
521 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | ||
522 | if (kn == 0) | ||
523 | { | ||
524 | /* Return -1 if no load average information is available. */ | ||
525 | nelem = 0; | ||
526 | elem = -1; | ||
527 | } | ||
528 | |||
529 | if (nelem >= 1) | ||
530 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | ||
531 | |||
532 | if (nelem >= 2) | ||
533 | { | ||
534 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | ||
535 | if (kn != 0) | ||
536 | { | ||
537 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | ||
538 | |||
539 | if (nelem >= 3) | ||
540 | { | ||
541 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | ||
542 | if (kn != 0) | ||
543 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | ||
544 | } | ||
545 | } | ||
546 | } | ||
547 | |||
548 | kstat_close (kc); | ||
549 | # endif /* HAVE_LIBKSTAT */ | ||
550 | |||
551 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | ||
552 | /* Use pstat_getdynamic() because we don't have to be root. */ | ||
553 | # define LDAV_DONE | ||
554 | # undef LOAD_AVE_TYPE | ||
555 | |||
556 | struct pst_dynamic dyn_info; | ||
557 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | ||
558 | return -1; | ||
559 | if (nelem > 0) | ||
560 | loadavg[elem++] = dyn_info.psd_avg_1_min; | ||
561 | if (nelem > 1) | ||
562 | loadavg[elem++] = dyn_info.psd_avg_5_min; | ||
563 | if (nelem > 2) | ||
564 | loadavg[elem++] = dyn_info.psd_avg_15_min; | ||
565 | |||
566 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | ||
567 | |||
568 | # if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__)) | ||
569 | # define LDAV_DONE | ||
570 | # undef LOAD_AVE_TYPE | ||
571 | |||
572 | # ifndef LINUX_LDAV_FILE | ||
573 | # define LINUX_LDAV_FILE "/proc/loadavg" | ||
574 | # endif | ||
575 | |||
576 | char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")]; | ||
577 | char const *ptr = ldavgbuf; | ||
578 | int fd, count; | ||
579 | |||
580 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | ||
581 | if (fd == -1) | ||
582 | return -1; | ||
583 | count = read (fd, ldavgbuf, sizeof ldavgbuf - 1); | ||
584 | (void) close (fd); | ||
585 | if (count <= 0) | ||
586 | return -1; | ||
587 | ldavgbuf[count] = '\0'; | ||
588 | |||
589 | for (elem = 0; elem < nelem; elem++) | ||
590 | { | ||
591 | char *endptr; | ||
592 | double d = c_strtod (ptr, &endptr); | ||
593 | if (ptr == endptr) | ||
594 | { | ||
595 | if (elem == 0) | ||
596 | return -1; | ||
597 | break; | ||
598 | } | ||
599 | loadavg[elem] = d; | ||
600 | ptr = endptr; | ||
601 | } | ||
602 | |||
603 | return elem; | ||
604 | |||
605 | # endif /* __linux__ || __CYGWIN__ */ | ||
606 | |||
607 | # if !defined (LDAV_DONE) && defined (__NetBSD__) | ||
608 | # define LDAV_DONE | ||
609 | # undef LOAD_AVE_TYPE | ||
610 | |||
611 | # ifndef NETBSD_LDAV_FILE | ||
612 | # define NETBSD_LDAV_FILE "/kern/loadavg" | ||
613 | # endif | ||
614 | |||
615 | unsigned long int load_ave[3], scale; | ||
616 | int count; | ||
617 | FILE *fp; | ||
618 | |||
619 | fp = fopen (NETBSD_LDAV_FILE, "r"); | ||
620 | if (fp == NULL) | ||
621 | return -1; | ||
622 | count = fscanf (fp, "%lu %lu %lu %lu\n", | ||
623 | &load_ave[0], &load_ave[1], &load_ave[2], | ||
624 | &scale); | ||
625 | (void) fclose (fp); | ||
626 | if (count != 4) | ||
627 | return -1; | ||
628 | |||
629 | for (elem = 0; elem < nelem; elem++) | ||
630 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | ||
631 | |||
632 | return elem; | ||
633 | |||
634 | # endif /* __NetBSD__ */ | ||
635 | |||
636 | # if !defined (LDAV_DONE) && defined (NeXT) | ||
637 | # define LDAV_DONE | ||
638 | /* The NeXT code was adapted from iscreen 3.2. */ | ||
639 | |||
640 | host_t host; | ||
641 | struct processor_set_basic_info info; | ||
642 | unsigned int info_count; | ||
643 | |||
644 | /* We only know how to get the 1-minute average for this system, | ||
645 | so even if the caller asks for more than 1, we only return 1. */ | ||
646 | |||
647 | if (!getloadavg_initialized) | ||
648 | { | ||
649 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | ||
650 | getloadavg_initialized = true; | ||
651 | } | ||
652 | |||
653 | if (getloadavg_initialized) | ||
654 | { | ||
655 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | ||
656 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | ||
657 | (processor_set_info_t) &info, &info_count) | ||
658 | != KERN_SUCCESS) | ||
659 | getloadavg_initialized = false; | ||
660 | else | ||
661 | { | ||
662 | if (nelem > 0) | ||
663 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | ||
664 | } | ||
665 | } | ||
666 | |||
667 | if (!getloadavg_initialized) | ||
668 | return -1; | ||
669 | # endif /* NeXT */ | ||
670 | |||
671 | # if !defined (LDAV_DONE) && defined (UMAX) | ||
672 | # define LDAV_DONE | ||
673 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | ||
674 | have a /dev/kmem. Information about the workings of the running kernel | ||
675 | can be gathered with inq_stats system calls. | ||
676 | We only know how to get the 1-minute average for this system. */ | ||
677 | |||
678 | struct proc_summary proc_sum_data; | ||
679 | struct stat_descr proc_info; | ||
680 | double load; | ||
681 | register unsigned int i, j; | ||
682 | |||
683 | if (cpus == 0) | ||
684 | { | ||
685 | register unsigned int c, i; | ||
686 | struct cpu_config conf; | ||
687 | struct stat_descr desc; | ||
688 | |||
689 | desc.sd_next = 0; | ||
690 | desc.sd_subsys = SUBSYS_CPU; | ||
691 | desc.sd_type = CPUTYPE_CONFIG; | ||
692 | desc.sd_addr = (char *) &conf; | ||
693 | desc.sd_size = sizeof conf; | ||
694 | |||
695 | if (inq_stats (1, &desc)) | ||
696 | return -1; | ||
697 | |||
698 | c = 0; | ||
699 | for (i = 0; i < conf.config_maxclass; ++i) | ||
700 | { | ||
701 | struct class_stats stats; | ||
702 | bzero ((char *) &stats, sizeof stats); | ||
703 | |||
704 | desc.sd_type = CPUTYPE_CLASS; | ||
705 | desc.sd_objid = i; | ||
706 | desc.sd_addr = (char *) &stats; | ||
707 | desc.sd_size = sizeof stats; | ||
708 | |||
709 | if (inq_stats (1, &desc)) | ||
710 | return -1; | ||
711 | |||
712 | c += stats.class_numcpus; | ||
713 | } | ||
714 | cpus = c; | ||
715 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | ||
716 | } | ||
717 | |||
718 | proc_info.sd_next = 0; | ||
719 | proc_info.sd_subsys = SUBSYS_PROC; | ||
720 | proc_info.sd_type = PROCTYPE_SUMMARY; | ||
721 | proc_info.sd_addr = (char *) &proc_sum_data; | ||
722 | proc_info.sd_size = sizeof (struct proc_summary); | ||
723 | proc_info.sd_sizeused = 0; | ||
724 | |||
725 | if (inq_stats (1, &proc_info) != 0) | ||
726 | return -1; | ||
727 | |||
728 | load = proc_sum_data.ps_nrunnable; | ||
729 | j = 0; | ||
730 | for (i = samples - 1; i > 0; --i) | ||
731 | { | ||
732 | load += proc_sum_data.ps_nrun[j]; | ||
733 | if (j++ == PS_NRUNSIZE) | ||
734 | j = 0; | ||
735 | } | ||
736 | |||
737 | if (nelem > 0) | ||
738 | loadavg[elem++] = load / samples / cpus; | ||
739 | # endif /* UMAX */ | ||
740 | |||
741 | # if !defined (LDAV_DONE) && defined (DGUX) | ||
742 | # define LDAV_DONE | ||
743 | /* This call can return -1 for an error, but with good args | ||
744 | it's not supposed to fail. The first argument is for no | ||
745 | apparent reason of type `long int *'. */ | ||
746 | dg_sys_info ((long int *) &load_info, | ||
747 | DG_SYS_INFO_LOAD_INFO_TYPE, | ||
748 | DG_SYS_INFO_LOAD_VERSION_0); | ||
749 | |||
750 | if (nelem > 0) | ||
751 | loadavg[elem++] = load_info.one_minute; | ||
752 | if (nelem > 1) | ||
753 | loadavg[elem++] = load_info.five_minute; | ||
754 | if (nelem > 2) | ||
755 | loadavg[elem++] = load_info.fifteen_minute; | ||
756 | # endif /* DGUX */ | ||
757 | |||
758 | # if !defined (LDAV_DONE) && defined (apollo) | ||
759 | # define LDAV_DONE | ||
760 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | ||
761 | |||
762 | This system call is not documented. The load average is obtained as | ||
763 | three long integers, for the load average over the past minute, | ||
764 | five minutes, and fifteen minutes. Each value is a scaled integer, | ||
765 | with 16 bits of integer part and 16 bits of fraction part. | ||
766 | |||
767 | I'm not sure which operating system first supported this system call, | ||
768 | but I know that SR10.2 supports it. */ | ||
769 | |||
770 | extern void proc1_$get_loadav (); | ||
771 | unsigned long load_ave[3]; | ||
772 | |||
773 | proc1_$get_loadav (load_ave); | ||
774 | |||
775 | if (nelem > 0) | ||
776 | loadavg[elem++] = load_ave[0] / 65536.0; | ||
777 | if (nelem > 1) | ||
778 | loadavg[elem++] = load_ave[1] / 65536.0; | ||
779 | if (nelem > 2) | ||
780 | loadavg[elem++] = load_ave[2] / 65536.0; | ||
781 | # endif /* apollo */ | ||
782 | |||
783 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) | ||
784 | # define LDAV_DONE | ||
785 | |||
786 | struct tbl_loadavg load_ave; | ||
787 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | ||
788 | loadavg[elem++] | ||
789 | = (load_ave.tl_lscale == 0 | ||
790 | ? load_ave.tl_avenrun.d[0] | ||
791 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | ||
792 | # endif /* OSF_MIPS */ | ||
793 | |||
794 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) | ||
795 | # define LDAV_DONE | ||
796 | |||
797 | /* A faithful emulation is going to have to be saved for a rainy day. */ | ||
798 | for ( ; elem < nelem; elem++) | ||
799 | { | ||
800 | loadavg[elem] = 0.0; | ||
801 | } | ||
802 | # endif /* __MSDOS__ || WINDOWS32 */ | ||
803 | |||
804 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) | ||
805 | # define LDAV_DONE | ||
806 | |||
807 | struct tbl_loadavg load_ave; | ||
808 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | ||
809 | for (elem = 0; elem < nelem; elem++) | ||
810 | loadavg[elem] | ||
811 | = (load_ave.tl_lscale == 0 | ||
812 | ? load_ave.tl_avenrun.d[elem] | ||
813 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | ||
814 | # endif /* OSF_ALPHA */ | ||
815 | |||
816 | # if !defined (LDAV_DONE) && defined (VMS) | ||
817 | /* VMS specific code -- read from the Load Ave driver. */ | ||
818 | |||
819 | LOAD_AVE_TYPE load_ave[3]; | ||
820 | static bool getloadavg_initialized; | ||
821 | # ifdef eunice | ||
822 | struct | ||
823 | { | ||
824 | int dsc$w_length; | ||
825 | char *dsc$a_pointer; | ||
826 | } descriptor; | ||
827 | # endif | ||
828 | |||
829 | /* Ensure that there is a channel open to the load ave device. */ | ||
830 | if (!getloadavg_initialized) | ||
831 | { | ||
832 | /* Attempt to open the channel. */ | ||
833 | # ifdef eunice | ||
834 | descriptor.dsc$w_length = 18; | ||
835 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | ||
836 | # else | ||
837 | $DESCRIPTOR (descriptor, "LAV0:"); | ||
838 | # endif | ||
839 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | ||
840 | getloadavg_initialized = true; | ||
841 | } | ||
842 | |||
843 | /* Read the load average vector. */ | ||
844 | if (getloadavg_initialized | ||
845 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | ||
846 | load_ave, 12, 0, 0, 0, 0) & 1)) | ||
847 | { | ||
848 | sys$dassgn (channel); | ||
849 | getloadavg_initialized = false; | ||
850 | } | ||
851 | |||
852 | if (!getloadavg_initialized) | ||
853 | return -1; | ||
854 | # endif /* VMS */ | ||
855 | |||
856 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) && !defined (VMS) | ||
857 | |||
858 | /* UNIX-specific code -- read the average from /dev/kmem. */ | ||
859 | |||
860 | # define LDAV_PRIVILEGED /* This code requires special installation. */ | ||
861 | |||
862 | LOAD_AVE_TYPE load_ave[3]; | ||
863 | |||
864 | /* Get the address of LDAV_SYMBOL. */ | ||
865 | if (offset == 0) | ||
866 | { | ||
867 | # ifndef sgi | ||
868 | # ifndef NLIST_STRUCT | ||
869 | strcpy (nl[0].n_name, LDAV_SYMBOL); | ||
870 | strcpy (nl[1].n_name, ""); | ||
871 | # else /* NLIST_STRUCT */ | ||
872 | # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME | ||
873 | nl[0].n_un.n_name = LDAV_SYMBOL; | ||
874 | nl[1].n_un.n_name = 0; | ||
875 | # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ | ||
876 | nl[0].n_name = LDAV_SYMBOL; | ||
877 | nl[1].n_name = 0; | ||
878 | # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ | ||
879 | # endif /* NLIST_STRUCT */ | ||
880 | |||
881 | # ifndef SUNOS_5 | ||
882 | if ( | ||
883 | # if !(defined (_AIX) && !defined (ps2)) | ||
884 | nlist (KERNEL_FILE, nl) | ||
885 | # else /* _AIX */ | ||
886 | knlist (nl, 1, sizeof (nl[0])) | ||
887 | # endif | ||
888 | >= 0) | ||
889 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | ||
890 | { | ||
891 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR | ||
892 | FIXUP_KERNEL_SYMBOL_ADDR (nl); | ||
893 | # endif | ||
894 | offset = nl[0].n_value; | ||
895 | } | ||
896 | # endif /* !SUNOS_5 */ | ||
897 | # else /* sgi */ | ||
898 | int ldav_off; | ||
899 | |||
900 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | ||
901 | if (ldav_off != -1) | ||
902 | offset = (long int) ldav_off & 0x7fffffff; | ||
903 | # endif /* sgi */ | ||
904 | } | ||
905 | |||
906 | /* Make sure we have /dev/kmem open. */ | ||
907 | if (!getloadavg_initialized) | ||
908 | { | ||
909 | # ifndef SUNOS_5 | ||
910 | channel = open ("/dev/kmem", O_RDONLY); | ||
911 | if (channel >= 0) | ||
912 | { | ||
913 | /* Set the channel to close on exec, so it does not | ||
914 | litter any child's descriptor table. */ | ||
915 | set_cloexec_flag (channel, true); | ||
916 | getloadavg_initialized = true; | ||
917 | } | ||
918 | # else /* SUNOS_5 */ | ||
919 | /* We pass 0 for the kernel, corefile, and swapfile names | ||
920 | to use the currently running kernel. */ | ||
921 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); | ||
922 | if (kd != 0) | ||
923 | { | ||
924 | /* nlist the currently running kernel. */ | ||
925 | kvm_nlist (kd, nl); | ||
926 | offset = nl[0].n_value; | ||
927 | getloadavg_initialized = true; | ||
928 | } | ||
929 | # endif /* SUNOS_5 */ | ||
930 | } | ||
931 | |||
932 | /* If we can, get the load average values. */ | ||
933 | if (offset && getloadavg_initialized) | ||
934 | { | ||
935 | /* Try to read the load. */ | ||
936 | # ifndef SUNOS_5 | ||
937 | if (lseek (channel, offset, 0) == -1L | ||
938 | || read (channel, (char *) load_ave, sizeof (load_ave)) | ||
939 | != sizeof (load_ave)) | ||
940 | { | ||
941 | close (channel); | ||
942 | getloadavg_initialized = false; | ||
943 | } | ||
944 | # else /* SUNOS_5 */ | ||
945 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | ||
946 | != sizeof (load_ave)) | ||
947 | { | ||
948 | kvm_close (kd); | ||
949 | getloadavg_initialized = false; | ||
950 | } | ||
951 | # endif /* SUNOS_5 */ | ||
952 | } | ||
953 | |||
954 | if (offset == 0 || !getloadavg_initialized) | ||
955 | return -1; | ||
956 | # endif /* LOAD_AVE_TYPE and not VMS */ | ||
957 | |||
958 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | ||
959 | if (nelem > 0) | ||
960 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | ||
961 | if (nelem > 1) | ||
962 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | ||
963 | if (nelem > 2) | ||
964 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | ||
965 | |||
966 | # define LDAV_DONE | ||
967 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | ||
968 | |||
969 | # if !defined LDAV_DONE | ||
970 | /* Set errno to zero to indicate that there was no particular error; | ||
971 | this function just can't work at all on this system. */ | ||
972 | errno = 0; | ||
973 | elem = -1; | ||
974 | # endif | ||
975 | return elem; | ||
976 | } | ||
977 | |||
978 | #endif /* ! HAVE_GETLOADAVG */ | ||
979 | |||
980 | #ifdef TEST | ||
981 | int | ||
982 | main (int argc, char **argv) | ||
983 | { | ||
984 | int naptime = 0; | ||
985 | |||
986 | if (argc > 1) | ||
987 | naptime = atoi (argv[1]); | ||
988 | |||
989 | while (1) | ||
990 | { | ||
991 | double avg[3]; | ||
992 | int loads; | ||
993 | |||
994 | errno = 0; /* Don't be misled if it doesn't set errno. */ | ||
995 | loads = getloadavg (avg, 3); | ||
996 | if (loads == -1) | ||
997 | { | ||
998 | perror ("Error getting load average"); | ||
999 | return EXIT_FAILURE; | ||
1000 | } | ||
1001 | if (loads > 0) | ||
1002 | printf ("1-minute: %f ", avg[0]); | ||
1003 | if (loads > 1) | ||
1004 | printf ("5-minute: %f ", avg[1]); | ||
1005 | if (loads > 2) | ||
1006 | printf ("15-minute: %f ", avg[2]); | ||
1007 | if (loads > 0) | ||
1008 | putchar ('\n'); | ||
1009 | |||
1010 | if (naptime == 0) | ||
1011 | break; | ||
1012 | sleep (naptime); | ||
1013 | } | ||
1014 | |||
1015 | return EXIT_SUCCESS; | ||
1016 | } | ||
1017 | #endif /* TEST */ | ||