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Diffstat (limited to 'plugins/t')
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diff --git a/plugins/getloadavg.c b/plugins/getloadavg.c new file mode 100644 index 0000000..e9c4c08 --- /dev/null +++ b/plugins/getloadavg.c | |||
@@ -0,0 +1,1086 @@ | |||
1 | /* Get the system load averages. | ||
2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995, 1997 | ||
3 | Free Software Foundation, Inc. | ||
4 | |||
5 | This program is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published by | ||
7 | the Free Software Foundation; either version 2, or (at your option) | ||
8 | any later version. | ||
9 | |||
10 | This program is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | GNU General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with this program; if not, write to the Free Software | ||
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | ||
18 | USA. */ | ||
19 | |||
20 | /* Compile-time symbols that this file uses: | ||
21 | |||
22 | HAVE_PSTAT_GETDYNAMIC Define this if your system has the | ||
23 | pstat_getdynamic function. I think it | ||
24 | is unique to HPUX9. The best way to get the | ||
25 | definition is through the AC_FUNC_GETLOADAVG | ||
26 | macro that comes with autoconf 2.13 or newer. | ||
27 | If that isn't an option, then just put | ||
28 | AC_CHECK_FUNCS(pstat_getdynamic) in your | ||
29 | configure.in file. | ||
30 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. | ||
31 | KERNEL_FILE Pathname of the kernel to nlist. | ||
32 | LDAV_CVT() Scale the load average from the kernel. | ||
33 | Returns a double. | ||
34 | LDAV_SYMBOL Name of kernel symbol giving load average. | ||
35 | LOAD_AVE_TYPE Type of the load average array in the kernel. | ||
36 | Must be defined unless one of | ||
37 | apollo, DGUX, NeXT, or UMAX is defined; | ||
38 | otherwise, no load average is available. | ||
39 | NLIST_STRUCT Include nlist.h, not a.out.h, and | ||
40 | the nlist n_name element is a pointer, | ||
41 | not an array. | ||
42 | NLIST_NAME_UNION struct nlist has an n_un member, not n_name. | ||
43 | LINUX_LDAV_FILE [__linux__]: File containing load averages. | ||
44 | |||
45 | Specific system predefines this file uses, aside from setting | ||
46 | default values if not emacs: | ||
47 | |||
48 | apollo | ||
49 | BSD Real BSD, not just BSD-like. | ||
50 | convex | ||
51 | DGUX | ||
52 | eunice UNIX emulator under VMS. | ||
53 | hpux | ||
54 | __MSDOS__ No-op for MSDOS. | ||
55 | NeXT | ||
56 | sgi | ||
57 | sequent Sequent Dynix 3.x.x (BSD) | ||
58 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | ||
59 | sony_news NEWS-OS (works at least for 4.1C) | ||
60 | UMAX | ||
61 | UMAX4_3 | ||
62 | VMS | ||
63 | WINDOWS32 No-op for Windows95/NT. | ||
64 | __linux__ Linux: assumes /proc filesystem mounted. | ||
65 | Support from Michael K. Johnson. | ||
66 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. | ||
67 | |||
68 | In addition, to avoid nesting many #ifdefs, we internally set | ||
69 | LDAV_DONE to indicate that the load average has been computed. | ||
70 | |||
71 | We also #define LDAV_PRIVILEGED if a program will require | ||
72 | special installation to be able to call getloadavg. */ | ||
73 | |||
74 | /* This should always be first. */ | ||
75 | #ifdef HAVE_CONFIG_H | ||
76 | # include <config.h> | ||
77 | #endif | ||
78 | |||
79 | #include <sys/types.h> | ||
80 | |||
81 | /* Both the Emacs and non-Emacs sections want this. Some | ||
82 | configuration files' definitions for the LOAD_AVE_CVT macro (like | ||
83 | sparc.h's) use macros like FSCALE, defined here. */ | ||
84 | #ifdef unix | ||
85 | # include <sys/param.h> | ||
86 | #endif | ||
87 | |||
88 | |||
89 | /* Exclude all the code except the test program at the end | ||
90 | if the system has its own `getloadavg' function. | ||
91 | |||
92 | The declaration of `errno' is needed by the test program | ||
93 | as well as the function itself, so it comes first. */ | ||
94 | |||
95 | #include <errno.h> | ||
96 | |||
97 | #ifndef errno | ||
98 | extern int errno; | ||
99 | #endif | ||
100 | |||
101 | #if HAVE_LOCALE_H | ||
102 | # include <locale.h> | ||
103 | #endif | ||
104 | #if !HAVE_SETLOCALE | ||
105 | # define setlocale(Category, Locale) /* empty */ | ||
106 | #endif | ||
107 | |||
108 | #ifndef HAVE_GETLOADAVG | ||
109 | |||
110 | /* The existing Emacs configuration files define a macro called | ||
111 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | ||
112 | returns the load average multiplied by 100. What we actually want | ||
113 | is a macro called LDAV_CVT, which returns the load average as an | ||
114 | unmultiplied double. | ||
115 | |||
116 | For backwards compatibility, we'll define LDAV_CVT in terms of | ||
117 | LOAD_AVE_CVT, but future machine config files should just define | ||
118 | LDAV_CVT directly. */ | ||
119 | |||
120 | # if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) | ||
121 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | ||
122 | # endif | ||
123 | |||
124 | # if !defined (BSD) && defined (ultrix) | ||
125 | /* Ultrix behaves like BSD on Vaxen. */ | ||
126 | # define BSD | ||
127 | # endif | ||
128 | |||
129 | # ifdef NeXT | ||
130 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which | ||
131 | conflicts with the definition understood in this file, that this | ||
132 | really is BSD. */ | ||
133 | # undef BSD | ||
134 | |||
135 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | ||
136 | defined to mean that the nlist method should be used, which is not true. */ | ||
137 | # undef FSCALE | ||
138 | # endif | ||
139 | |||
140 | /* Set values that are different from the defaults, which are | ||
141 | set a little farther down with #ifndef. */ | ||
142 | |||
143 | |||
144 | /* Some shorthands. */ | ||
145 | |||
146 | # if defined (HPUX) && !defined (hpux) | ||
147 | # define hpux | ||
148 | # endif | ||
149 | |||
150 | # if defined (__hpux) && !defined (hpux) | ||
151 | # define hpux | ||
152 | # endif | ||
153 | |||
154 | # if defined (__sun) && !defined (sun) | ||
155 | # define sun | ||
156 | # endif | ||
157 | |||
158 | # if defined(hp300) && !defined(hpux) | ||
159 | # define MORE_BSD | ||
160 | # endif | ||
161 | |||
162 | # if defined(ultrix) && defined(mips) | ||
163 | # define decstation | ||
164 | # endif | ||
165 | |||
166 | # if defined (__SVR4) && !defined (SVR4) | ||
167 | # define SVR4 | ||
168 | # endif | ||
169 | |||
170 | # if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) | ||
171 | # define SUNOS_5 | ||
172 | # endif | ||
173 | |||
174 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) | ||
175 | # define OSF_ALPHA | ||
176 | # include <sys/mbuf.h> | ||
177 | # include <sys/socket.h> | ||
178 | # include <net/route.h> | ||
179 | # include <sys/table.h> | ||
180 | # endif | ||
181 | |||
182 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | ||
183 | # define OSF_MIPS | ||
184 | # include <sys/table.h> | ||
185 | # endif | ||
186 | |||
187 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | ||
188 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | ||
189 | that with a couple of other things and we'll have a unique match. */ | ||
190 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) | ||
191 | # define tek4300 /* Define by emacs, but not by other users. */ | ||
192 | # endif | ||
193 | |||
194 | |||
195 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ | ||
196 | # ifndef LOAD_AVE_TYPE | ||
197 | |||
198 | # ifdef MORE_BSD | ||
199 | # define LOAD_AVE_TYPE long | ||
200 | # endif | ||
201 | |||
202 | # ifdef sun | ||
203 | # define LOAD_AVE_TYPE long | ||
204 | # endif | ||
205 | |||
206 | # ifdef decstation | ||
207 | # define LOAD_AVE_TYPE long | ||
208 | # endif | ||
209 | |||
210 | # ifdef _SEQUENT_ | ||
211 | # define LOAD_AVE_TYPE long | ||
212 | # endif | ||
213 | |||
214 | # ifdef sgi | ||
215 | # define LOAD_AVE_TYPE long | ||
216 | # endif | ||
217 | |||
218 | # ifdef SVR4 | ||
219 | # define LOAD_AVE_TYPE long | ||
220 | # endif | ||
221 | |||
222 | # ifdef sony_news | ||
223 | # define LOAD_AVE_TYPE long | ||
224 | # endif | ||
225 | |||
226 | # ifdef sequent | ||
227 | # define LOAD_AVE_TYPE long | ||
228 | # endif | ||
229 | |||
230 | # ifdef OSF_ALPHA | ||
231 | # define LOAD_AVE_TYPE long | ||
232 | # endif | ||
233 | |||
234 | # if defined (ardent) && defined (titan) | ||
235 | # define LOAD_AVE_TYPE long | ||
236 | # endif | ||
237 | |||
238 | # ifdef tek4300 | ||
239 | # define LOAD_AVE_TYPE long | ||
240 | # endif | ||
241 | |||
242 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ | ||
243 | # define LOAD_AVE_TYPE long | ||
244 | # endif | ||
245 | |||
246 | # ifdef _AIX | ||
247 | # define LOAD_AVE_TYPE long | ||
248 | # endif | ||
249 | |||
250 | # ifdef convex | ||
251 | # define LOAD_AVE_TYPE double | ||
252 | # ifndef LDAV_CVT | ||
253 | # define LDAV_CVT(n) (n) | ||
254 | # endif | ||
255 | # endif | ||
256 | |||
257 | # endif /* No LOAD_AVE_TYPE. */ | ||
258 | |||
259 | # ifdef OSF_ALPHA | ||
260 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, | ||
261 | according to ghazi@noc.rutgers.edu. */ | ||
262 | # undef FSCALE | ||
263 | # define FSCALE 1024.0 | ||
264 | # endif | ||
265 | |||
266 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ | ||
267 | /* <sys/param.h> defines an incorrect value for FSCALE on an | ||
268 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | ||
269 | # undef FSCALE | ||
270 | # define FSCALE 100.0 | ||
271 | # endif | ||
272 | |||
273 | |||
274 | # ifndef FSCALE | ||
275 | |||
276 | /* SunOS and some others define FSCALE in sys/param.h. */ | ||
277 | |||
278 | # ifdef MORE_BSD | ||
279 | # define FSCALE 2048.0 | ||
280 | # endif | ||
281 | |||
282 | # if defined(MIPS) || defined(SVR4) || defined(decstation) | ||
283 | # define FSCALE 256 | ||
284 | # endif | ||
285 | |||
286 | # if defined (sgi) || defined (sequent) | ||
287 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined | ||
288 | above under #ifdef MIPS. But we want the sgi value. */ | ||
289 | # undef FSCALE | ||
290 | # define FSCALE 1000.0 | ||
291 | # endif | ||
292 | |||
293 | # if defined (ardent) && defined (titan) | ||
294 | # define FSCALE 65536.0 | ||
295 | # endif | ||
296 | |||
297 | # ifdef tek4300 | ||
298 | # define FSCALE 100.0 | ||
299 | # endif | ||
300 | |||
301 | # ifdef _AIX | ||
302 | # define FSCALE 65536.0 | ||
303 | # endif | ||
304 | |||
305 | # endif /* Not FSCALE. */ | ||
306 | |||
307 | # if !defined (LDAV_CVT) && defined (FSCALE) | ||
308 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) | ||
309 | # endif | ||
310 | |||
311 | # ifndef NLIST_STRUCT | ||
312 | # if HAVE_NLIST_H | ||
313 | # define NLIST_STRUCT | ||
314 | # endif | ||
315 | # endif | ||
316 | |||
317 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ | ||
318 | # ifndef NLIST_STRUCT | ||
319 | |||
320 | # ifdef MORE_BSD | ||
321 | # define NLIST_STRUCT | ||
322 | # endif | ||
323 | |||
324 | # ifdef sun | ||
325 | # define NLIST_STRUCT | ||
326 | # endif | ||
327 | |||
328 | # ifdef decstation | ||
329 | # define NLIST_STRUCT | ||
330 | # endif | ||
331 | |||
332 | # ifdef hpux | ||
333 | # define NLIST_STRUCT | ||
334 | # endif | ||
335 | |||
336 | # if defined (_SEQUENT_) || defined (sequent) | ||
337 | # define NLIST_STRUCT | ||
338 | # endif | ||
339 | |||
340 | # ifdef sgi | ||
341 | # define NLIST_STRUCT | ||
342 | # endif | ||
343 | |||
344 | # ifdef SVR4 | ||
345 | # define NLIST_STRUCT | ||
346 | # endif | ||
347 | |||
348 | # ifdef sony_news | ||
349 | # define NLIST_STRUCT | ||
350 | # endif | ||
351 | |||
352 | # ifdef OSF_ALPHA | ||
353 | # define NLIST_STRUCT | ||
354 | # endif | ||
355 | |||
356 | # if defined (ardent) && defined (titan) | ||
357 | # define NLIST_STRUCT | ||
358 | # endif | ||
359 | |||
360 | # ifdef tek4300 | ||
361 | # define NLIST_STRUCT | ||
362 | # endif | ||
363 | |||
364 | # ifdef butterfly | ||
365 | # define NLIST_STRUCT | ||
366 | # endif | ||
367 | |||
368 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ | ||
369 | # define NLIST_STRUCT | ||
370 | # endif | ||
371 | |||
372 | # ifdef _AIX | ||
373 | # define NLIST_STRUCT | ||
374 | # endif | ||
375 | |||
376 | # endif /* defined (NLIST_STRUCT) */ | ||
377 | |||
378 | |||
379 | # if defined(sgi) || (defined(mips) && !defined(BSD)) | ||
380 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | ||
381 | # endif | ||
382 | |||
383 | |||
384 | # if !defined (KERNEL_FILE) && defined (sequent) | ||
385 | # define KERNEL_FILE "/dynix" | ||
386 | # endif | ||
387 | |||
388 | # if !defined (KERNEL_FILE) && defined (hpux) | ||
389 | # define KERNEL_FILE "/hp-ux" | ||
390 | # endif | ||
391 | |||
392 | # if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan))) | ||
393 | # define KERNEL_FILE "/unix" | ||
394 | # endif | ||
395 | |||
396 | |||
397 | # if !defined (LDAV_SYMBOL) && defined (alliant) | ||
398 | # define LDAV_SYMBOL "_Loadavg" | ||
399 | # endif | ||
400 | |||
401 | # if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) | ||
402 | # define LDAV_SYMBOL "avenrun" | ||
403 | # endif | ||
404 | |||
405 | # ifdef HAVE_UNISTD_H | ||
406 | # include <unistd.h> | ||
407 | # endif | ||
408 | |||
409 | # include <stdio.h> | ||
410 | |||
411 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | ||
412 | nlist method. */ | ||
413 | # if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) | ||
414 | # define LOAD_AVE_TYPE double | ||
415 | # endif | ||
416 | |||
417 | # ifdef LOAD_AVE_TYPE | ||
418 | |||
419 | # ifndef VMS | ||
420 | # ifndef __linux__ | ||
421 | # ifndef NLIST_STRUCT | ||
422 | # include <a.out.h> | ||
423 | # else /* NLIST_STRUCT */ | ||
424 | # include <nlist.h> | ||
425 | # endif /* NLIST_STRUCT */ | ||
426 | |||
427 | # ifdef SUNOS_5 | ||
428 | # include <fcntl.h> | ||
429 | # include <kvm.h> | ||
430 | # include <kstat.h> | ||
431 | # endif | ||
432 | |||
433 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | ||
434 | # include <sys/pstat.h> | ||
435 | # endif | ||
436 | |||
437 | # ifndef KERNEL_FILE | ||
438 | # define KERNEL_FILE "/vmunix" | ||
439 | # endif /* KERNEL_FILE */ | ||
440 | |||
441 | # ifndef LDAV_SYMBOL | ||
442 | # define LDAV_SYMBOL "_avenrun" | ||
443 | # endif /* LDAV_SYMBOL */ | ||
444 | # endif /* __linux__ */ | ||
445 | |||
446 | # else /* VMS */ | ||
447 | |||
448 | # ifndef eunice | ||
449 | # include <iodef.h> | ||
450 | # include <descrip.h> | ||
451 | # else /* eunice */ | ||
452 | # include <vms/iodef.h> | ||
453 | # endif /* eunice */ | ||
454 | # endif /* VMS */ | ||
455 | |||
456 | # ifndef LDAV_CVT | ||
457 | # define LDAV_CVT(n) ((double) (n)) | ||
458 | # endif /* !LDAV_CVT */ | ||
459 | |||
460 | # endif /* LOAD_AVE_TYPE */ | ||
461 | |||
462 | # if defined(__GNU__) && !defined (NeXT) | ||
463 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ | ||
464 | /* GNU system acts much like NeXT, for load average purposes, | ||
465 | but not exactly. */ | ||
466 | # define NeXT | ||
467 | # define host_self mach_host_self | ||
468 | # endif | ||
469 | |||
470 | # ifdef NeXT | ||
471 | # ifdef HAVE_MACH_MACH_H | ||
472 | # include <mach/mach.h> | ||
473 | # else | ||
474 | # include <mach.h> | ||
475 | # endif | ||
476 | # endif /* NeXT */ | ||
477 | |||
478 | # ifdef sgi | ||
479 | # include <sys/sysmp.h> | ||
480 | # endif /* sgi */ | ||
481 | |||
482 | # ifdef UMAX | ||
483 | # include <stdio.h> | ||
484 | # include <signal.h> | ||
485 | # include <sys/time.h> | ||
486 | # include <sys/wait.h> | ||
487 | # include <sys/syscall.h> | ||
488 | |||
489 | # ifdef UMAX_43 | ||
490 | # include <machine/cpu.h> | ||
491 | # include <inq_stats/statistics.h> | ||
492 | # include <inq_stats/sysstats.h> | ||
493 | # include <inq_stats/cpustats.h> | ||
494 | # include <inq_stats/procstats.h> | ||
495 | # else /* Not UMAX_43. */ | ||
496 | # include <sys/sysdefs.h> | ||
497 | # include <sys/statistics.h> | ||
498 | # include <sys/sysstats.h> | ||
499 | # include <sys/cpudefs.h> | ||
500 | # include <sys/cpustats.h> | ||
501 | # include <sys/procstats.h> | ||
502 | # endif /* Not UMAX_43. */ | ||
503 | # endif /* UMAX */ | ||
504 | |||
505 | # ifdef DGUX | ||
506 | # include <sys/dg_sys_info.h> | ||
507 | # endif | ||
508 | |||
509 | # if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | ||
510 | # include <fcntl.h> | ||
511 | # else | ||
512 | # include <sys/file.h> | ||
513 | # endif | ||
514 | |||
515 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | ||
516 | |||
517 | # ifdef NeXT | ||
518 | static processor_set_t default_set; | ||
519 | static int getloadavg_initialized; | ||
520 | # endif /* NeXT */ | ||
521 | |||
522 | # ifdef UMAX | ||
523 | static unsigned int cpus = 0; | ||
524 | static unsigned int samples; | ||
525 | # endif /* UMAX */ | ||
526 | |||
527 | # ifdef DGUX | ||
528 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ | ||
529 | # endif /* DGUX */ | ||
530 | |||
531 | # ifdef LOAD_AVE_TYPE | ||
532 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ | ||
533 | static int channel; | ||
534 | /* Nonzero iff channel is valid. */ | ||
535 | static int getloadavg_initialized; | ||
536 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | ||
537 | static long offset; | ||
538 | |||
539 | # if !defined(VMS) && !defined(sgi) && !defined(__linux__) | ||
540 | static struct nlist nl[2]; | ||
541 | # endif /* Not VMS or sgi */ | ||
542 | |||
543 | # ifdef SUNOS_5 | ||
544 | static kvm_t *kd; | ||
545 | # endif /* SUNOS_5 */ | ||
546 | |||
547 | # endif /* LOAD_AVE_TYPE */ | ||
548 | |||
549 | /* Put the 1 minute, 5 minute and 15 minute load averages | ||
550 | into the first NELEM elements of LOADAVG. | ||
551 | Return the number written (never more than 3, but may be less than NELEM), | ||
552 | or -1 if an error occurred. */ | ||
553 | |||
554 | int | ||
555 | getloadavg (loadavg, nelem) | ||
556 | double loadavg[]; | ||
557 | int nelem; | ||
558 | { | ||
559 | int elem = 0; /* Return value. */ | ||
560 | |||
561 | # ifdef NO_GET_LOAD_AVG | ||
562 | # define LDAV_DONE | ||
563 | /* Set errno to zero to indicate that there was no particular error; | ||
564 | this function just can't work at all on this system. */ | ||
565 | errno = 0; | ||
566 | elem = -1; | ||
567 | # endif | ||
568 | |||
569 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) | ||
570 | /* Use libkstat because we don't have to be root. */ | ||
571 | # define LDAV_DONE | ||
572 | kstat_ctl_t *kc; | ||
573 | kstat_t *ksp; | ||
574 | kstat_named_t *kn; | ||
575 | |||
576 | kc = kstat_open (); | ||
577 | if (kc == 0) | ||
578 | return -1; | ||
579 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); | ||
580 | if (ksp == 0 ) | ||
581 | return -1; | ||
582 | if (kstat_read (kc, ksp, 0) == -1) | ||
583 | return -1; | ||
584 | |||
585 | |||
586 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | ||
587 | if (kn == 0) | ||
588 | { | ||
589 | /* Return -1 if no load average information is available. */ | ||
590 | nelem = 0; | ||
591 | elem = -1; | ||
592 | } | ||
593 | |||
594 | if (nelem >= 1) | ||
595 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | ||
596 | |||
597 | if (nelem >= 2) | ||
598 | { | ||
599 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | ||
600 | if (kn != 0) | ||
601 | { | ||
602 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | ||
603 | |||
604 | if (nelem >= 3) | ||
605 | { | ||
606 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | ||
607 | if (kn != 0) | ||
608 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | ||
609 | } | ||
610 | } | ||
611 | } | ||
612 | |||
613 | kstat_close (kc); | ||
614 | # endif /* HAVE_LIBKSTAT */ | ||
615 | |||
616 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | ||
617 | /* Use pstat_getdynamic() because we don't have to be root. */ | ||
618 | # define LDAV_DONE | ||
619 | # undef LOAD_AVE_TYPE | ||
620 | |||
621 | struct pst_dynamic dyn_info; | ||
622 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | ||
623 | return -1; | ||
624 | if (nelem > 0) | ||
625 | loadavg[elem++] = dyn_info.psd_avg_1_min; | ||
626 | if (nelem > 1) | ||
627 | loadavg[elem++] = dyn_info.psd_avg_5_min; | ||
628 | if (nelem > 2) | ||
629 | loadavg[elem++] = dyn_info.psd_avg_15_min; | ||
630 | |||
631 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | ||
632 | |||
633 | # if !defined (LDAV_DONE) && defined (__linux__) | ||
634 | # define LDAV_DONE | ||
635 | # undef LOAD_AVE_TYPE | ||
636 | |||
637 | # ifndef LINUX_LDAV_FILE | ||
638 | # define LINUX_LDAV_FILE "/proc/loadavg" | ||
639 | # endif | ||
640 | |||
641 | char ldavgbuf[40]; | ||
642 | double load_ave[3]; | ||
643 | int fd, count; | ||
644 | |||
645 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | ||
646 | if (fd == -1) | ||
647 | return -1; | ||
648 | count = read (fd, ldavgbuf, 40); | ||
649 | (void) close (fd); | ||
650 | if (count <= 0) | ||
651 | return -1; | ||
652 | |||
653 | /* The following sscanf must use the C locale. */ | ||
654 | setlocale (LC_NUMERIC, "C"); | ||
655 | count = sscanf (ldavgbuf, "%lf %lf %lf", | ||
656 | &load_ave[0], &load_ave[1], &load_ave[2]); | ||
657 | setlocale (LC_NUMERIC, ""); | ||
658 | if (count < 1) | ||
659 | return -1; | ||
660 | |||
661 | for (elem = 0; elem < nelem && elem < count; elem++) | ||
662 | loadavg[elem] = load_ave[elem]; | ||
663 | |||
664 | return elem; | ||
665 | |||
666 | # endif /* __linux__ */ | ||
667 | |||
668 | # if !defined (LDAV_DONE) && defined (__NetBSD__) | ||
669 | # define LDAV_DONE | ||
670 | # undef LOAD_AVE_TYPE | ||
671 | |||
672 | # ifndef NETBSD_LDAV_FILE | ||
673 | # define NETBSD_LDAV_FILE "/kern/loadavg" | ||
674 | # endif | ||
675 | |||
676 | unsigned long int load_ave[3], scale; | ||
677 | int count; | ||
678 | FILE *fp; | ||
679 | |||
680 | fp = fopen (NETBSD_LDAV_FILE, "r"); | ||
681 | if (fp == NULL) | ||
682 | return -1; | ||
683 | count = fscanf (fp, "%lu %lu %lu %lu\n", | ||
684 | &load_ave[0], &load_ave[1], &load_ave[2], | ||
685 | &scale); | ||
686 | (void) fclose (fp); | ||
687 | if (count != 4) | ||
688 | return -1; | ||
689 | |||
690 | for (elem = 0; elem < nelem; elem++) | ||
691 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | ||
692 | |||
693 | return elem; | ||
694 | |||
695 | # endif /* __NetBSD__ */ | ||
696 | |||
697 | # if !defined (LDAV_DONE) && defined (NeXT) | ||
698 | # define LDAV_DONE | ||
699 | /* The NeXT code was adapted from iscreen 3.2. */ | ||
700 | |||
701 | host_t host; | ||
702 | struct processor_set_basic_info info; | ||
703 | unsigned info_count; | ||
704 | |||
705 | /* We only know how to get the 1-minute average for this system, | ||
706 | so even if the caller asks for more than 1, we only return 1. */ | ||
707 | |||
708 | if (!getloadavg_initialized) | ||
709 | { | ||
710 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | ||
711 | getloadavg_initialized = 1; | ||
712 | } | ||
713 | |||
714 | if (getloadavg_initialized) | ||
715 | { | ||
716 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | ||
717 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | ||
718 | (processor_set_info_t) &info, &info_count) | ||
719 | != KERN_SUCCESS) | ||
720 | getloadavg_initialized = 0; | ||
721 | else | ||
722 | { | ||
723 | if (nelem > 0) | ||
724 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | ||
725 | } | ||
726 | } | ||
727 | |||
728 | if (!getloadavg_initialized) | ||
729 | return -1; | ||
730 | # endif /* NeXT */ | ||
731 | |||
732 | # if !defined (LDAV_DONE) && defined (UMAX) | ||
733 | # define LDAV_DONE | ||
734 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not | ||
735 | have a /dev/kmem. Information about the workings of the running kernel | ||
736 | can be gathered with inq_stats system calls. | ||
737 | We only know how to get the 1-minute average for this system. */ | ||
738 | |||
739 | struct proc_summary proc_sum_data; | ||
740 | struct stat_descr proc_info; | ||
741 | double load; | ||
742 | register unsigned int i, j; | ||
743 | |||
744 | if (cpus == 0) | ||
745 | { | ||
746 | register unsigned int c, i; | ||
747 | struct cpu_config conf; | ||
748 | struct stat_descr desc; | ||
749 | |||
750 | desc.sd_next = 0; | ||
751 | desc.sd_subsys = SUBSYS_CPU; | ||
752 | desc.sd_type = CPUTYPE_CONFIG; | ||
753 | desc.sd_addr = (char *) &conf; | ||
754 | desc.sd_size = sizeof conf; | ||
755 | |||
756 | if (inq_stats (1, &desc)) | ||
757 | return -1; | ||
758 | |||
759 | c = 0; | ||
760 | for (i = 0; i < conf.config_maxclass; ++i) | ||
761 | { | ||
762 | struct class_stats stats; | ||
763 | bzero ((char *) &stats, sizeof stats); | ||
764 | |||
765 | desc.sd_type = CPUTYPE_CLASS; | ||
766 | desc.sd_objid = i; | ||
767 | desc.sd_addr = (char *) &stats; | ||
768 | desc.sd_size = sizeof stats; | ||
769 | |||
770 | if (inq_stats (1, &desc)) | ||
771 | return -1; | ||
772 | |||
773 | c += stats.class_numcpus; | ||
774 | } | ||
775 | cpus = c; | ||
776 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | ||
777 | } | ||
778 | |||
779 | proc_info.sd_next = 0; | ||
780 | proc_info.sd_subsys = SUBSYS_PROC; | ||
781 | proc_info.sd_type = PROCTYPE_SUMMARY; | ||
782 | proc_info.sd_addr = (char *) &proc_sum_data; | ||
783 | proc_info.sd_size = sizeof (struct proc_summary); | ||
784 | proc_info.sd_sizeused = 0; | ||
785 | |||
786 | if (inq_stats (1, &proc_info) != 0) | ||
787 | return -1; | ||
788 | |||
789 | load = proc_sum_data.ps_nrunnable; | ||
790 | j = 0; | ||
791 | for (i = samples - 1; i > 0; --i) | ||
792 | { | ||
793 | load += proc_sum_data.ps_nrun[j]; | ||
794 | if (j++ == PS_NRUNSIZE) | ||
795 | j = 0; | ||
796 | } | ||
797 | |||
798 | if (nelem > 0) | ||
799 | loadavg[elem++] = load / samples / cpus; | ||
800 | # endif /* UMAX */ | ||
801 | |||
802 | # if !defined (LDAV_DONE) && defined (DGUX) | ||
803 | # define LDAV_DONE | ||
804 | /* This call can return -1 for an error, but with good args | ||
805 | it's not supposed to fail. The first argument is for no | ||
806 | apparent reason of type `long int *'. */ | ||
807 | dg_sys_info ((long int *) &load_info, | ||
808 | DG_SYS_INFO_LOAD_INFO_TYPE, | ||
809 | DG_SYS_INFO_LOAD_VERSION_0); | ||
810 | |||
811 | if (nelem > 0) | ||
812 | loadavg[elem++] = load_info.one_minute; | ||
813 | if (nelem > 1) | ||
814 | loadavg[elem++] = load_info.five_minute; | ||
815 | if (nelem > 2) | ||
816 | loadavg[elem++] = load_info.fifteen_minute; | ||
817 | # endif /* DGUX */ | ||
818 | |||
819 | # if !defined (LDAV_DONE) && defined (apollo) | ||
820 | # define LDAV_DONE | ||
821 | /* Apollo code from lisch@mentorg.com (Ray Lischner). | ||
822 | |||
823 | This system call is not documented. The load average is obtained as | ||
824 | three long integers, for the load average over the past minute, | ||
825 | five minutes, and fifteen minutes. Each value is a scaled integer, | ||
826 | with 16 bits of integer part and 16 bits of fraction part. | ||
827 | |||
828 | I'm not sure which operating system first supported this system call, | ||
829 | but I know that SR10.2 supports it. */ | ||
830 | |||
831 | extern void proc1_$get_loadav (); | ||
832 | unsigned long load_ave[3]; | ||
833 | |||
834 | proc1_$get_loadav (load_ave); | ||
835 | |||
836 | if (nelem > 0) | ||
837 | loadavg[elem++] = load_ave[0] / 65536.0; | ||
838 | if (nelem > 1) | ||
839 | loadavg[elem++] = load_ave[1] / 65536.0; | ||
840 | if (nelem > 2) | ||
841 | loadavg[elem++] = load_ave[2] / 65536.0; | ||
842 | # endif /* apollo */ | ||
843 | |||
844 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) | ||
845 | # define LDAV_DONE | ||
846 | |||
847 | struct tbl_loadavg load_ave; | ||
848 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | ||
849 | loadavg[elem++] | ||
850 | = (load_ave.tl_lscale == 0 | ||
851 | ? load_ave.tl_avenrun.d[0] | ||
852 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | ||
853 | # endif /* OSF_MIPS */ | ||
854 | |||
855 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) | ||
856 | # define LDAV_DONE | ||
857 | |||
858 | /* A faithful emulation is going to have to be saved for a rainy day. */ | ||
859 | for ( ; elem < nelem; elem++) | ||
860 | { | ||
861 | loadavg[elem] = 0.0; | ||
862 | } | ||
863 | # endif /* __MSDOS__ || WINDOWS32 */ | ||
864 | |||
865 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) | ||
866 | # define LDAV_DONE | ||
867 | |||
868 | struct tbl_loadavg load_ave; | ||
869 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | ||
870 | for (elem = 0; elem < nelem; elem++) | ||
871 | loadavg[elem] | ||
872 | = (load_ave.tl_lscale == 0 | ||
873 | ? load_ave.tl_avenrun.d[elem] | ||
874 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | ||
875 | # endif /* OSF_ALPHA */ | ||
876 | |||
877 | # if !defined (LDAV_DONE) && defined (VMS) | ||
878 | /* VMS specific code -- read from the Load Ave driver. */ | ||
879 | |||
880 | LOAD_AVE_TYPE load_ave[3]; | ||
881 | static int getloadavg_initialized = 0; | ||
882 | # ifdef eunice | ||
883 | struct | ||
884 | { | ||
885 | int dsc$w_length; | ||
886 | char *dsc$a_pointer; | ||
887 | } descriptor; | ||
888 | # endif | ||
889 | |||
890 | /* Ensure that there is a channel open to the load ave device. */ | ||
891 | if (!getloadavg_initialized) | ||
892 | { | ||
893 | /* Attempt to open the channel. */ | ||
894 | # ifdef eunice | ||
895 | descriptor.dsc$w_length = 18; | ||
896 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | ||
897 | # else | ||
898 | $DESCRIPTOR (descriptor, "LAV0:"); | ||
899 | # endif | ||
900 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) | ||
901 | getloadavg_initialized = 1; | ||
902 | } | ||
903 | |||
904 | /* Read the load average vector. */ | ||
905 | if (getloadavg_initialized | ||
906 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | ||
907 | load_ave, 12, 0, 0, 0, 0) & 1)) | ||
908 | { | ||
909 | sys$dassgn (channel); | ||
910 | getloadavg_initialized = 0; | ||
911 | } | ||
912 | |||
913 | if (!getloadavg_initialized) | ||
914 | return -1; | ||
915 | # endif /* VMS */ | ||
916 | |||
917 | # if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) | ||
918 | |||
919 | /* UNIX-specific code -- read the average from /dev/kmem. */ | ||
920 | |||
921 | # define LDAV_PRIVILEGED /* This code requires special installation. */ | ||
922 | |||
923 | LOAD_AVE_TYPE load_ave[3]; | ||
924 | |||
925 | /* Get the address of LDAV_SYMBOL. */ | ||
926 | if (offset == 0) | ||
927 | { | ||
928 | # ifndef sgi | ||
929 | # ifndef NLIST_STRUCT | ||
930 | strcpy (nl[0].n_name, LDAV_SYMBOL); | ||
931 | strcpy (nl[1].n_name, ""); | ||
932 | # else /* NLIST_STRUCT */ | ||
933 | # ifdef NLIST_NAME_UNION | ||
934 | nl[0].n_un.n_name = LDAV_SYMBOL; | ||
935 | nl[1].n_un.n_name = 0; | ||
936 | # else /* not NLIST_NAME_UNION */ | ||
937 | nl[0].n_name = LDAV_SYMBOL; | ||
938 | nl[1].n_name = 0; | ||
939 | # endif /* not NLIST_NAME_UNION */ | ||
940 | # endif /* NLIST_STRUCT */ | ||
941 | |||
942 | # ifndef SUNOS_5 | ||
943 | if ( | ||
944 | # if !(defined (_AIX) && !defined (ps2)) | ||
945 | nlist (KERNEL_FILE, nl) | ||
946 | # else /* _AIX */ | ||
947 | knlist (nl, 1, sizeof (nl[0])) | ||
948 | # endif | ||
949 | >= 0) | ||
950 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | ||
951 | { | ||
952 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR | ||
953 | FIXUP_KERNEL_SYMBOL_ADDR (nl); | ||
954 | # endif | ||
955 | offset = nl[0].n_value; | ||
956 | } | ||
957 | # endif /* !SUNOS_5 */ | ||
958 | # else /* sgi */ | ||
959 | int ldav_off; | ||
960 | |||
961 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | ||
962 | if (ldav_off != -1) | ||
963 | offset = (long) ldav_off & 0x7fffffff; | ||
964 | # endif /* sgi */ | ||
965 | } | ||
966 | |||
967 | /* Make sure we have /dev/kmem open. */ | ||
968 | if (!getloadavg_initialized) | ||
969 | { | ||
970 | # ifndef SUNOS_5 | ||
971 | channel = open ("/dev/kmem", 0); | ||
972 | if (channel >= 0) | ||
973 | { | ||
974 | /* Set the channel to close on exec, so it does not | ||
975 | litter any child's descriptor table. */ | ||
976 | # ifdef FD_SETFD | ||
977 | # ifndef FD_CLOEXEC | ||
978 | # define FD_CLOEXEC 1 | ||
979 | # endif | ||
980 | (void) fcntl (channel, F_SETFD, FD_CLOEXEC); | ||
981 | # endif | ||
982 | getloadavg_initialized = 1; | ||
983 | } | ||
984 | # else /* SUNOS_5 */ | ||
985 | /* We pass 0 for the kernel, corefile, and swapfile names | ||
986 | to use the currently running kernel. */ | ||
987 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); | ||
988 | if (kd != 0) | ||
989 | { | ||
990 | /* nlist the currently running kernel. */ | ||
991 | kvm_nlist (kd, nl); | ||
992 | offset = nl[0].n_value; | ||
993 | getloadavg_initialized = 1; | ||
994 | } | ||
995 | # endif /* SUNOS_5 */ | ||
996 | } | ||
997 | |||
998 | /* If we can, get the load average values. */ | ||
999 | if (offset && getloadavg_initialized) | ||
1000 | { | ||
1001 | /* Try to read the load. */ | ||
1002 | # ifndef SUNOS_5 | ||
1003 | if (lseek (channel, offset, 0) == -1L | ||
1004 | || read (channel, (char *) load_ave, sizeof (load_ave)) | ||
1005 | != sizeof (load_ave)) | ||
1006 | { | ||
1007 | close (channel); | ||
1008 | getloadavg_initialized = 0; | ||
1009 | } | ||
1010 | # else /* SUNOS_5 */ | ||
1011 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) | ||
1012 | != sizeof (load_ave)) | ||
1013 | { | ||
1014 | kvm_close (kd); | ||
1015 | getloadavg_initialized = 0; | ||
1016 | } | ||
1017 | # endif /* SUNOS_5 */ | ||
1018 | } | ||
1019 | |||
1020 | if (offset == 0 || !getloadavg_initialized) | ||
1021 | return -1; | ||
1022 | # endif /* LOAD_AVE_TYPE and not VMS */ | ||
1023 | |||
1024 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ | ||
1025 | if (nelem > 0) | ||
1026 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | ||
1027 | if (nelem > 1) | ||
1028 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | ||
1029 | if (nelem > 2) | ||
1030 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | ||
1031 | |||
1032 | # define LDAV_DONE | ||
1033 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | ||
1034 | |||
1035 | # ifdef LDAV_DONE | ||
1036 | return elem; | ||
1037 | # else | ||
1038 | /* Set errno to zero to indicate that there was no particular error; | ||
1039 | this function just can't work at all on this system. */ | ||
1040 | errno = 0; | ||
1041 | return -1; | ||
1042 | # endif | ||
1043 | } | ||
1044 | |||
1045 | #endif /* ! HAVE_GETLOADAVG */ | ||
1046 | |||
1047 | #ifdef TEST | ||
1048 | void | ||
1049 | main (argc, argv) | ||
1050 | int argc; | ||
1051 | char **argv; | ||
1052 | { | ||
1053 | int naptime = 0; | ||
1054 | |||
1055 | if (argc > 1) | ||
1056 | naptime = atoi (argv[1]); | ||
1057 | |||
1058 | while (1) | ||
1059 | { | ||
1060 | double avg[3]; | ||
1061 | int loads; | ||
1062 | |||
1063 | errno = 0; /* Don't be misled if it doesn't set errno. */ | ||
1064 | loads = getloadavg (avg, 3); | ||
1065 | if (loads == -1) | ||
1066 | { | ||
1067 | perror ("Error getting load average"); | ||
1068 | exit (1); | ||
1069 | } | ||
1070 | if (loads > 0) | ||
1071 | printf ("1-minute: %f ", avg[0]); | ||
1072 | if (loads > 1) | ||
1073 | printf ("5-minute: %f ", avg[1]); | ||
1074 | if (loads > 2) | ||
1075 | printf ("15-minute: %f ", avg[2]); | ||
1076 | if (loads > 0) | ||
1077 | putchar ('\n'); | ||
1078 | |||
1079 | if (naptime == 0) | ||
1080 | break; | ||
1081 | sleep (naptime); | ||
1082 | } | ||
1083 | |||
1084 | exit (0); | ||
1085 | } | ||
1086 | #endif /* TEST */ | ||