Commit | Line | Data |
---|---|---|
1e5ba5b5 | 1 | /* Get the system load averages. |
2c30b2fc | 2 | Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995, 1997 |
1e5ba5b5 RM |
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 | |
0468655b KH |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
18 | USA. */ | |
1e5ba5b5 RM |
19 | |
20 | /* Compile-time symbols that this file uses: | |
21 | ||
22 | FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. | |
23 | KERNEL_FILE Pathname of the kernel to nlist. | |
24 | LDAV_CVT() Scale the load average from the kernel. | |
25 | Returns a double. | |
26 | LDAV_SYMBOL Name of kernel symbol giving load average. | |
27 | LOAD_AVE_TYPE Type of the load average array in the kernel. | |
28 | Must be defined unless one of | |
29 | apollo, DGUX, NeXT, or UMAX is defined; | |
30 | otherwise, no load average is available. | |
31 | NLIST_STRUCT Include nlist.h, not a.out.h, and | |
32 | the nlist n_name element is a pointer, | |
33 | not an array. | |
34 | NLIST_NAME_UNION struct nlist has an n_un member, not n_name. | |
22ddf250 | 35 | LINUX_LDAV_FILE [__linux__]: File containing load averages. |
1e5ba5b5 RM |
36 | |
37 | Specific system predefines this file uses, aside from setting | |
38 | default values if not emacs: | |
39 | ||
40 | apollo | |
41 | BSD Real BSD, not just BSD-like. | |
91bf5fad | 42 | convex |
1e5ba5b5 RM |
43 | DGUX |
44 | eunice UNIX emulator under VMS. | |
45 | hpux | |
383ebe49 | 46 | __MSDOS__ No-op for MSDOS. |
1e5ba5b5 RM |
47 | NeXT |
48 | sgi | |
49 | sequent Sequent Dynix 3.x.x (BSD) | |
50 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
51 | sony_news NEWS-OS (works at least for 4.1C) | |
52 | UMAX | |
53 | UMAX4_3 | |
54 | VMS | |
383ebe49 | 55 | WINDOWS32 No-op for Windows95/NT. |
22ddf250 | 56 | __linux__ Linux: assumes /proc filesystem mounted. |
1e5ba5b5 | 57 | Support from Michael K. Johnson. |
9eb8034b | 58 | __NetBSD__ NetBSD: assumes /kern filesystem mounted. |
1e5ba5b5 RM |
59 | |
60 | In addition, to avoid nesting many #ifdefs, we internally set | |
61 | LDAV_DONE to indicate that the load average has been computed. | |
62 | ||
63 | We also #define LDAV_PRIVILEGED if a program will require | |
64 | special installation to be able to call getloadavg. */ | |
65 | ||
df3dd7d6 RM |
66 | /* This should always be first. */ |
67 | #ifdef HAVE_CONFIG_H | |
3da4f367 | 68 | # include <config.h> |
df3dd7d6 RM |
69 | #endif |
70 | ||
1e5ba5b5 RM |
71 | #include <sys/types.h> |
72 | ||
73 | /* Both the Emacs and non-Emacs sections want this. Some | |
74 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
75 | sparc.h's) use macros like FSCALE, defined here. */ | |
76 | #ifdef unix | |
3da4f367 | 77 | # include <sys/param.h> |
1e5ba5b5 RM |
78 | #endif |
79 | ||
80 | ||
04402ae3 | 81 | /* Exclude all the code except the test program at the end |
39c5a83f RM |
82 | if the system has its own `getloadavg' function. |
83 | ||
84 | The declaration of `errno' is needed by the test program | |
85 | as well as the function itself, so it comes first. */ | |
86 | ||
87 | #include <errno.h> | |
88 | ||
89 | #ifndef errno | |
90 | extern int errno; | |
91 | #endif | |
04402ae3 RM |
92 | |
93 | #ifndef HAVE_GETLOADAVG | |
94 | ||
95 | ||
1e5ba5b5 RM |
96 | /* The existing Emacs configuration files define a macro called |
97 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
98 | returns the load average multiplied by 100. What we actually want | |
99 | is a macro called LDAV_CVT, which returns the load average as an | |
100 | unmultiplied double. | |
101 | ||
102 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
103 | LOAD_AVE_CVT, but future machine config files should just define | |
104 | LDAV_CVT directly. */ | |
105 | ||
3da4f367 JM |
106 | # if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) |
107 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) | |
108 | # endif | |
1e5ba5b5 | 109 | |
3da4f367 | 110 | # if !defined (BSD) && defined (ultrix) |
1e5ba5b5 | 111 | /* Ultrix behaves like BSD on Vaxen. */ |
3da4f367 JM |
112 | # define BSD |
113 | # endif | |
1e5ba5b5 | 114 | |
3da4f367 | 115 | # ifdef NeXT |
1e5ba5b5 RM |
116 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
117 | conflicts with the definition understood in this file, that this | |
118 | really is BSD. */ | |
3da4f367 | 119 | # undef BSD |
1e5ba5b5 RM |
120 | |
121 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
122 | defined to mean that the nlist method should be used, which is not true. */ | |
3da4f367 JM |
123 | # undef FSCALE |
124 | # endif | |
1e5ba5b5 RM |
125 | |
126 | /* Set values that are different from the defaults, which are | |
127 | set a little farther down with #ifndef. */ | |
128 | ||
129 | ||
130 | /* Some shorthands. */ | |
131 | ||
3da4f367 JM |
132 | # if defined (HPUX) && !defined (hpux) |
133 | # define hpux | |
134 | # endif | |
1e5ba5b5 | 135 | |
3da4f367 JM |
136 | # if defined (__hpux) && !defined (hpux) |
137 | # define hpux | |
138 | # endif | |
73a46a9c | 139 | |
3da4f367 JM |
140 | # if defined (__sun) && !defined (sun) |
141 | # define sun | |
142 | # endif | |
73a46a9c | 143 | |
3da4f367 JM |
144 | # if defined(hp300) && !defined(hpux) |
145 | # define MORE_BSD | |
146 | # endif | |
1e5ba5b5 | 147 | |
3da4f367 JM |
148 | # if defined(ultrix) && defined(mips) |
149 | # define decstation | |
150 | # endif | |
1e5ba5b5 | 151 | |
3da4f367 JM |
152 | # if defined (__SVR4) && !defined (SVR4) |
153 | # define SVR4 | |
154 | # endif | |
1e5ba5b5 | 155 | |
3da4f367 JM |
156 | # if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) |
157 | # define SUNOS_5 | |
158 | # endif | |
1e5ba5b5 | 159 | |
3da4f367 JM |
160 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
161 | # define OSF_ALPHA | |
162 | # include <sys/table.h> | |
163 | # endif | |
164 | ||
165 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
166 | # define OSF_MIPS | |
167 | # include <sys/table.h> | |
168 | # endif | |
1e5ba5b5 RM |
169 | |
170 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
171 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
172 | that with a couple of other things and we'll have a unique match. */ | |
3da4f367 JM |
173 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
174 | # define tek4300 /* Define by emacs, but not by other users. */ | |
175 | # endif | |
1e5ba5b5 RM |
176 | |
177 | ||
8eda6c51 | 178 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
3da4f367 | 179 | # ifndef LOAD_AVE_TYPE |
5ac622b2 | 180 | |
3da4f367 JM |
181 | # ifdef MORE_BSD |
182 | # define LOAD_AVE_TYPE long | |
183 | # endif | |
8eda6c51 | 184 | |
3da4f367 JM |
185 | # ifdef sun |
186 | # define LOAD_AVE_TYPE long | |
187 | # endif | |
8eda6c51 | 188 | |
3da4f367 JM |
189 | # ifdef decstation |
190 | # define LOAD_AVE_TYPE long | |
191 | # endif | |
8eda6c51 | 192 | |
3da4f367 JM |
193 | # ifdef _SEQUENT_ |
194 | # define LOAD_AVE_TYPE long | |
195 | # endif | |
8eda6c51 | 196 | |
3da4f367 JM |
197 | # ifdef sgi |
198 | # define LOAD_AVE_TYPE long | |
199 | # endif | |
8eda6c51 | 200 | |
3da4f367 JM |
201 | # ifdef SVR4 |
202 | # define LOAD_AVE_TYPE long | |
203 | # endif | |
8eda6c51 | 204 | |
3da4f367 JM |
205 | # ifdef sony_news |
206 | # define LOAD_AVE_TYPE long | |
207 | # endif | |
8eda6c51 | 208 | |
3da4f367 JM |
209 | # ifdef sequent |
210 | # define LOAD_AVE_TYPE long | |
211 | # endif | |
8eda6c51 | 212 | |
3da4f367 JM |
213 | # ifdef OSF_ALPHA |
214 | # define LOAD_AVE_TYPE long | |
215 | # endif | |
8eda6c51 | 216 | |
3da4f367 JM |
217 | # if defined (ardent) && defined (titan) |
218 | # define LOAD_AVE_TYPE long | |
219 | # endif | |
8eda6c51 | 220 | |
3da4f367 JM |
221 | # ifdef tek4300 |
222 | # define LOAD_AVE_TYPE long | |
223 | # endif | |
1e5ba5b5 | 224 | |
3da4f367 JM |
225 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
226 | # define LOAD_AVE_TYPE long | |
227 | # endif | |
59c0e567 | 228 | |
3da4f367 JM |
229 | # ifdef _AIX |
230 | # define LOAD_AVE_TYPE long | |
231 | # endif | |
bc77c95c | 232 | |
3da4f367 JM |
233 | # ifdef convex |
234 | # define LOAD_AVE_TYPE double | |
235 | # ifndef LDAV_CVT | |
236 | # define LDAV_CVT(n) (n) | |
237 | # endif | |
238 | # endif | |
91bf5fad | 239 | |
3da4f367 | 240 | # endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 241 | |
3da4f367 | 242 | # ifdef OSF_ALPHA |
f870f3fe RM |
243 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
244 | according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
245 | # undef FSCALE |
246 | # define FSCALE 1024.0 | |
247 | # endif | |
f870f3fe | 248 | |
3da4f367 | 249 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
bf074c06 RM |
250 | /* <sys/param.h> defines an incorrect value for FSCALE on an |
251 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
252 | # undef FSCALE |
253 | # define FSCALE 100.0 | |
254 | # endif | |
bf074c06 | 255 | |
f870f3fe | 256 | |
3da4f367 | 257 | # ifndef FSCALE |
1e5ba5b5 RM |
258 | |
259 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
260 | ||
3da4f367 JM |
261 | # ifdef MORE_BSD |
262 | # define FSCALE 2048.0 | |
263 | # endif | |
1e5ba5b5 | 264 | |
3da4f367 JM |
265 | # if defined(MIPS) || defined(SVR4) || defined(decstation) |
266 | # define FSCALE 256 | |
267 | # endif | |
1e5ba5b5 | 268 | |
3da4f367 | 269 | # if defined (sgi) || defined (sequent) |
934d56b7 RM |
270 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
271 | above under #ifdef MIPS. But we want the sgi value. */ | |
3da4f367 JM |
272 | # undef FSCALE |
273 | # define FSCALE 1000.0 | |
274 | # endif | |
1e5ba5b5 | 275 | |
3da4f367 JM |
276 | # if defined (ardent) && defined (titan) |
277 | # define FSCALE 65536.0 | |
278 | # endif | |
1e5ba5b5 | 279 | |
3da4f367 JM |
280 | # ifdef tek4300 |
281 | # define FSCALE 100.0 | |
282 | # endif | |
59c0e567 | 283 | |
3da4f367 JM |
284 | # ifdef _AIX |
285 | # define FSCALE 65536.0 | |
286 | # endif | |
bc77c95c | 287 | |
3da4f367 | 288 | # endif /* Not FSCALE. */ |
1e5ba5b5 | 289 | |
3da4f367 JM |
290 | # if !defined (LDAV_CVT) && defined (FSCALE) |
291 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) | |
292 | # endif | |
1e5ba5b5 | 293 | |
8eda6c51 | 294 | /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ |
3da4f367 | 295 | # ifndef NLIST_STRUCT |
8eda6c51 | 296 | |
3da4f367 JM |
297 | # ifdef MORE_BSD |
298 | # define NLIST_STRUCT | |
299 | # endif | |
8eda6c51 | 300 | |
3da4f367 JM |
301 | # ifdef sun |
302 | # define NLIST_STRUCT | |
303 | # endif | |
8eda6c51 | 304 | |
3da4f367 JM |
305 | # ifdef decstation |
306 | # define NLIST_STRUCT | |
307 | # endif | |
8eda6c51 | 308 | |
3da4f367 JM |
309 | # ifdef hpux |
310 | # define NLIST_STRUCT | |
311 | # endif | |
8eda6c51 | 312 | |
3da4f367 JM |
313 | # if defined (_SEQUENT_) || defined (sequent) |
314 | # define NLIST_STRUCT | |
315 | # endif | |
8eda6c51 | 316 | |
3da4f367 JM |
317 | # ifdef sgi |
318 | # define NLIST_STRUCT | |
319 | # endif | |
8eda6c51 | 320 | |
3da4f367 JM |
321 | # ifdef SVR4 |
322 | # define NLIST_STRUCT | |
323 | # endif | |
1e5ba5b5 | 324 | |
3da4f367 JM |
325 | # ifdef sony_news |
326 | # define NLIST_STRUCT | |
327 | # endif | |
8eda6c51 | 328 | |
3da4f367 JM |
329 | # ifdef OSF_ALPHA |
330 | # define NLIST_STRUCT | |
331 | # endif | |
8eda6c51 | 332 | |
3da4f367 JM |
333 | # if defined (ardent) && defined (titan) |
334 | # define NLIST_STRUCT | |
335 | # endif | |
8eda6c51 | 336 | |
3da4f367 JM |
337 | # ifdef tek4300 |
338 | # define NLIST_STRUCT | |
339 | # endif | |
8eda6c51 | 340 | |
3da4f367 JM |
341 | # ifdef butterfly |
342 | # define NLIST_STRUCT | |
343 | # endif | |
8eda6c51 | 344 | |
3da4f367 JM |
345 | # if defined(alliant) && defined(i860) /* Alliant FX/2800 */ |
346 | # define NLIST_STRUCT | |
347 | # endif | |
59c0e567 | 348 | |
3da4f367 JM |
349 | # ifdef _AIX |
350 | # define NLIST_STRUCT | |
351 | # endif | |
bc77c95c | 352 | |
3da4f367 | 353 | # endif /* defined (NLIST_STRUCT) */ |
8eda6c51 | 354 | |
1e5ba5b5 | 355 | |
3da4f367 JM |
356 | # if defined(sgi) || (defined(mips) && !defined(BSD)) |
357 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) | |
358 | # endif | |
1e5ba5b5 RM |
359 | |
360 | ||
3da4f367 JM |
361 | # if !defined (KERNEL_FILE) && defined (sequent) |
362 | # define KERNEL_FILE "/dynix" | |
363 | # endif | |
1e5ba5b5 | 364 | |
3da4f367 JM |
365 | # if !defined (KERNEL_FILE) && defined (hpux) |
366 | # define KERNEL_FILE "/hp-ux" | |
367 | # endif | |
1e5ba5b5 | 368 | |
3da4f367 JM |
369 | # if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
370 | # define KERNEL_FILE "/unix" | |
371 | # endif | |
1e5ba5b5 RM |
372 | |
373 | ||
3da4f367 JM |
374 | # if !defined (LDAV_SYMBOL) && defined (alliant) |
375 | # define LDAV_SYMBOL "_Loadavg" | |
376 | # endif | |
1e5ba5b5 | 377 | |
3da4f367 JM |
378 | # if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) |
379 | # define LDAV_SYMBOL "avenrun" | |
380 | # endif | |
1e5ba5b5 | 381 | |
3da4f367 JM |
382 | # ifdef HAVE_UNISTD_H |
383 | # include <unistd.h> | |
384 | # endif | |
1e5ba5b5 | 385 | |
3da4f367 | 386 | # include <stdio.h> |
1e5ba5b5 RM |
387 | |
388 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
389 | nlist method. */ | |
3da4f367 JM |
390 | # if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) |
391 | # define LOAD_AVE_TYPE double | |
392 | # endif | |
393 | ||
394 | # ifdef LOAD_AVE_TYPE | |
395 | ||
396 | # ifndef VMS | |
397 | # ifndef __linux__ | |
398 | # ifndef NLIST_STRUCT | |
399 | # include <a.out.h> | |
400 | # else /* NLIST_STRUCT */ | |
401 | # include <nlist.h> | |
402 | # endif /* NLIST_STRUCT */ | |
403 | ||
404 | # ifdef SUNOS_5 | |
405 | # include <fcntl.h> | |
406 | # include <kvm.h> | |
407 | # include <kstat.h> | |
408 | # endif | |
409 | ||
410 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | |
411 | # include <sys/pstat.h> | |
412 | # endif | |
413 | ||
414 | # ifndef KERNEL_FILE | |
415 | # define KERNEL_FILE "/vmunix" | |
416 | # endif /* KERNEL_FILE */ | |
417 | ||
418 | # ifndef LDAV_SYMBOL | |
419 | # define LDAV_SYMBOL "_avenrun" | |
420 | # endif /* LDAV_SYMBOL */ | |
421 | # endif /* __linux__ */ | |
422 | ||
423 | # else /* VMS */ | |
424 | ||
425 | # ifndef eunice | |
426 | # include <iodef.h> | |
427 | # include <descrip.h> | |
428 | # else /* eunice */ | |
429 | # include <vms/iodef.h> | |
430 | # endif /* eunice */ | |
431 | # endif /* VMS */ | |
432 | ||
433 | # ifndef LDAV_CVT | |
434 | # define LDAV_CVT(n) ((double) (n)) | |
435 | # endif /* !LDAV_CVT */ | |
436 | ||
437 | # endif /* LOAD_AVE_TYPE */ | |
438 | ||
2c30b2fc MB |
439 | # ifdef __GNU__ |
440 | /* GNU hurd systems act sort of like NeXT ones, for load average purposes. */ | |
441 | # define NeXT | |
442 | # define host_self mach_host_self | |
443 | # endif | |
444 | ||
3da4f367 JM |
445 | # ifdef NeXT |
446 | # ifdef HAVE_MACH_MACH_H | |
447 | # include <mach/mach.h> | |
448 | # else | |
449 | # include <mach.h> | |
450 | # endif | |
451 | # endif /* NeXT */ | |
452 | ||
453 | # ifdef sgi | |
454 | # include <sys/sysmp.h> | |
455 | # endif /* sgi */ | |
456 | ||
457 | # ifdef UMAX | |
458 | # include <stdio.h> | |
459 | # include <signal.h> | |
460 | # include <sys/time.h> | |
461 | # include <sys/wait.h> | |
462 | # include <sys/syscall.h> | |
463 | ||
464 | # ifdef UMAX_43 | |
465 | # include <machine/cpu.h> | |
466 | # include <inq_stats/statistics.h> | |
467 | # include <inq_stats/sysstats.h> | |
468 | # include <inq_stats/cpustats.h> | |
469 | # include <inq_stats/procstats.h> | |
470 | # else /* Not UMAX_43. */ | |
471 | # include <sys/sysdefs.h> | |
472 | # include <sys/statistics.h> | |
473 | # include <sys/sysstats.h> | |
474 | # include <sys/cpudefs.h> | |
475 | # include <sys/cpustats.h> | |
476 | # include <sys/procstats.h> | |
477 | # endif /* Not UMAX_43. */ | |
478 | # endif /* UMAX */ | |
479 | ||
480 | # ifdef DGUX | |
481 | # include <sys/dg_sys_info.h> | |
482 | # endif | |
483 | ||
484 | # if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) | |
485 | # include <fcntl.h> | |
486 | # else | |
487 | # include <sys/file.h> | |
488 | # endif | |
1e5ba5b5 RM |
489 | \f |
490 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
491 | ||
3da4f367 | 492 | # ifdef NeXT |
1e5ba5b5 RM |
493 | static processor_set_t default_set; |
494 | static int getloadavg_initialized; | |
3da4f367 | 495 | # endif /* NeXT */ |
1e5ba5b5 | 496 | |
3da4f367 | 497 | # ifdef UMAX |
1e5ba5b5 RM |
498 | static unsigned int cpus = 0; |
499 | static unsigned int samples; | |
3da4f367 | 500 | # endif /* UMAX */ |
1e5ba5b5 | 501 | |
3da4f367 | 502 | # ifdef DGUX |
1e5ba5b5 | 503 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
3da4f367 | 504 | # endif /* DGUX */ |
1e5ba5b5 | 505 | |
3da4f367 | 506 | # ifdef LOAD_AVE_TYPE |
1e5ba5b5 RM |
507 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
508 | static int channel; | |
509 | /* Nonzero iff channel is valid. */ | |
510 | static int getloadavg_initialized; | |
511 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ | |
512 | static long offset; | |
513 | ||
3da4f367 | 514 | # if !defined(VMS) && !defined(sgi) && !defined(__linux__) |
1e5ba5b5 | 515 | static struct nlist nl[2]; |
3da4f367 | 516 | # endif /* Not VMS or sgi */ |
1e5ba5b5 | 517 | |
3da4f367 | 518 | # ifdef SUNOS_5 |
1e5ba5b5 | 519 | static kvm_t *kd; |
3da4f367 | 520 | # endif /* SUNOS_5 */ |
1e5ba5b5 | 521 | |
3da4f367 | 522 | # endif /* LOAD_AVE_TYPE */ |
1e5ba5b5 RM |
523 | \f |
524 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
525 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 526 | Return the number written (never more than 3, but may be less than NELEM), |
1e5ba5b5 RM |
527 | or -1 if an error occurred. */ |
528 | ||
529 | int | |
530 | getloadavg (loadavg, nelem) | |
531 | double loadavg[]; | |
532 | int nelem; | |
533 | { | |
534 | int elem = 0; /* Return value. */ | |
535 | ||
3da4f367 JM |
536 | # ifdef NO_GET_LOAD_AVG |
537 | # define LDAV_DONE | |
7ee260fe RM |
538 | /* Set errno to zero to indicate that there was no particular error; |
539 | this function just can't work at all on this system. */ | |
540 | errno = 0; | |
541 | elem = -1; | |
3da4f367 | 542 | # endif |
7ee260fe | 543 | |
3da4f367 | 544 | # if !defined (LDAV_DONE) && defined (SUNOS_5) |
4e98d4fa | 545 | /* Use libkstat because we don't have to be root. */ |
3da4f367 | 546 | # define LDAV_DONE |
4e98d4fa RS |
547 | kstat_ctl_t *kc; |
548 | kstat_t *ksp; | |
549 | kstat_named_t *kn; | |
550 | ||
551 | kc = kstat_open (); | |
3da4f367 JM |
552 | if (kc == 0) |
553 | return -1; | |
4e98d4fa | 554 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
3da4f367 JM |
555 | if (ksp == 0 ) |
556 | return -1; | |
557 | if (kstat_read (kc, ksp, 0) == -1) | |
558 | return -1; | |
73a46a9c | 559 | |
4e98d4fa RS |
560 | |
561 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
562 | if (kn == 0) | |
563 | { | |
564 | /* Return -1 if no load average information is available. */ | |
565 | nelem = 0; | |
566 | elem = -1; | |
567 | } | |
568 | ||
569 | if (nelem >= 1) | |
570 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
571 | ||
572 | if (nelem >= 2) | |
573 | { | |
574 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
575 | if (kn != 0) | |
576 | { | |
577 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
578 | ||
579 | if (nelem >= 3) | |
580 | { | |
581 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
582 | if (kn != 0) | |
583 | loadavg[elem++] = (double) kn->value.ul/FSCALE; | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | kstat_close (kc); | |
3da4f367 | 589 | # endif /* SUNOS_5 */ |
4e98d4fa | 590 | |
3da4f367 JM |
591 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
592 | /* Use pstat_getdynamic() because we don't have to be root. */ | |
593 | # define LDAV_DONE | |
594 | # undef LOAD_AVE_TYPE | |
1e5ba5b5 | 595 | |
3da4f367 JM |
596 | struct pst_dynamic dyn_info; |
597 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | |
598 | return -1; | |
599 | if (nelem > 0) | |
600 | loadavg[elem++] = dyn_info.psd_avg_1_min; | |
601 | if (nelem > 1) | |
602 | loadavg[elem++] = dyn_info.psd_avg_5_min; | |
603 | if (nelem > 2) | |
604 | loadavg[elem++] = dyn_info.psd_avg_15_min; | |
605 | ||
606 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | |
607 | ||
608 | # if !defined (LDAV_DONE) && defined (__linux__) | |
609 | # define LDAV_DONE | |
610 | # undef LOAD_AVE_TYPE | |
611 | ||
612 | # ifndef LINUX_LDAV_FILE | |
613 | # define LINUX_LDAV_FILE "/proc/loadavg" | |
614 | # endif | |
1e5ba5b5 RM |
615 | |
616 | char ldavgbuf[40]; | |
617 | double load_ave[3]; | |
618 | int fd, count; | |
619 | ||
620 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
621 | if (fd == -1) | |
622 | return -1; | |
623 | count = read (fd, ldavgbuf, 40); | |
624 | (void) close (fd); | |
625 | if (count <= 0) | |
626 | return -1; | |
627 | ||
628 | count = sscanf (ldavgbuf, "%lf %lf %lf", | |
629 | &load_ave[0], &load_ave[1], &load_ave[2]); | |
630 | if (count < 1) | |
631 | return -1; | |
632 | ||
633 | for (elem = 0; elem < nelem && elem < count; elem++) | |
634 | loadavg[elem] = load_ave[elem]; | |
635 | ||
636 | return elem; | |
637 | ||
3da4f367 | 638 | # endif /* __linux__ */ |
1e5ba5b5 | 639 | |
3da4f367 JM |
640 | # if !defined (LDAV_DONE) && defined (__NetBSD__) |
641 | # define LDAV_DONE | |
642 | # undef LOAD_AVE_TYPE | |
9eb8034b | 643 | |
3da4f367 JM |
644 | # ifndef NETBSD_LDAV_FILE |
645 | # define NETBSD_LDAV_FILE "/kern/loadavg" | |
646 | # endif | |
9eb8034b RM |
647 | |
648 | unsigned long int load_ave[3], scale; | |
649 | int count; | |
650 | FILE *fp; | |
651 | ||
8f090e85 | 652 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
653 | if (fp == NULL) |
654 | return -1; | |
655 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
656 | &load_ave[0], &load_ave[1], &load_ave[2], | |
657 | &scale); | |
658 | (void) fclose (fp); | |
659 | if (count != 4) | |
660 | return -1; | |
661 | ||
662 | for (elem = 0; elem < nelem; elem++) | |
663 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
664 | ||
665 | return elem; | |
666 | ||
3da4f367 | 667 | # endif /* __NetBSD__ */ |
9eb8034b | 668 | |
3da4f367 JM |
669 | # if !defined (LDAV_DONE) && defined (NeXT) |
670 | # define LDAV_DONE | |
1e5ba5b5 RM |
671 | /* The NeXT code was adapted from iscreen 3.2. */ |
672 | ||
673 | host_t host; | |
674 | struct processor_set_basic_info info; | |
675 | unsigned info_count; | |
676 | ||
039e9c8b DM |
677 | /* We only know how to get the 1-minute average for this system, |
678 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
679 | |
680 | if (!getloadavg_initialized) | |
681 | { | |
682 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
683 | getloadavg_initialized = 1; | |
684 | } | |
685 | ||
686 | if (getloadavg_initialized) | |
687 | { | |
688 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
689 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
3da4f367 | 690 | (processor_set_info_t) &info, &info_count) |
1e5ba5b5 RM |
691 | != KERN_SUCCESS) |
692 | getloadavg_initialized = 0; | |
693 | else | |
694 | { | |
695 | if (nelem > 0) | |
696 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
697 | } | |
698 | } | |
699 | ||
700 | if (!getloadavg_initialized) | |
701 | return -1; | |
3da4f367 | 702 | # endif /* NeXT */ |
1e5ba5b5 | 703 | |
3da4f367 JM |
704 | # if !defined (LDAV_DONE) && defined (UMAX) |
705 | # define LDAV_DONE | |
1e5ba5b5 RM |
706 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
707 | have a /dev/kmem. Information about the workings of the running kernel | |
708 | can be gathered with inq_stats system calls. | |
709 | We only know how to get the 1-minute average for this system. */ | |
710 | ||
711 | struct proc_summary proc_sum_data; | |
712 | struct stat_descr proc_info; | |
713 | double load; | |
714 | register unsigned int i, j; | |
715 | ||
716 | if (cpus == 0) | |
717 | { | |
718 | register unsigned int c, i; | |
719 | struct cpu_config conf; | |
720 | struct stat_descr desc; | |
721 | ||
722 | desc.sd_next = 0; | |
723 | desc.sd_subsys = SUBSYS_CPU; | |
724 | desc.sd_type = CPUTYPE_CONFIG; | |
725 | desc.sd_addr = (char *) &conf; | |
726 | desc.sd_size = sizeof conf; | |
727 | ||
728 | if (inq_stats (1, &desc)) | |
729 | return -1; | |
730 | ||
731 | c = 0; | |
732 | for (i = 0; i < conf.config_maxclass; ++i) | |
733 | { | |
734 | struct class_stats stats; | |
735 | bzero ((char *) &stats, sizeof stats); | |
736 | ||
737 | desc.sd_type = CPUTYPE_CLASS; | |
738 | desc.sd_objid = i; | |
739 | desc.sd_addr = (char *) &stats; | |
740 | desc.sd_size = sizeof stats; | |
741 | ||
742 | if (inq_stats (1, &desc)) | |
743 | return -1; | |
744 | ||
745 | c += stats.class_numcpus; | |
746 | } | |
747 | cpus = c; | |
748 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
749 | } | |
750 | ||
751 | proc_info.sd_next = 0; | |
752 | proc_info.sd_subsys = SUBSYS_PROC; | |
753 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
754 | proc_info.sd_addr = (char *) &proc_sum_data; | |
755 | proc_info.sd_size = sizeof (struct proc_summary); | |
756 | proc_info.sd_sizeused = 0; | |
757 | ||
758 | if (inq_stats (1, &proc_info) != 0) | |
759 | return -1; | |
760 | ||
761 | load = proc_sum_data.ps_nrunnable; | |
762 | j = 0; | |
763 | for (i = samples - 1; i > 0; --i) | |
764 | { | |
765 | load += proc_sum_data.ps_nrun[j]; | |
766 | if (j++ == PS_NRUNSIZE) | |
767 | j = 0; | |
768 | } | |
769 | ||
770 | if (nelem > 0) | |
771 | loadavg[elem++] = load / samples / cpus; | |
3da4f367 | 772 | # endif /* UMAX */ |
1e5ba5b5 | 773 | |
3da4f367 JM |
774 | # if !defined (LDAV_DONE) && defined (DGUX) |
775 | # define LDAV_DONE | |
1e5ba5b5 RM |
776 | /* This call can return -1 for an error, but with good args |
777 | it's not supposed to fail. The first argument is for no | |
778 | apparent reason of type `long int *'. */ | |
779 | dg_sys_info ((long int *) &load_info, | |
780 | DG_SYS_INFO_LOAD_INFO_TYPE, | |
781 | DG_SYS_INFO_LOAD_VERSION_0); | |
782 | ||
783 | if (nelem > 0) | |
784 | loadavg[elem++] = load_info.one_minute; | |
785 | if (nelem > 1) | |
786 | loadavg[elem++] = load_info.five_minute; | |
787 | if (nelem > 2) | |
788 | loadavg[elem++] = load_info.fifteen_minute; | |
3da4f367 | 789 | # endif /* DGUX */ |
1e5ba5b5 | 790 | |
3da4f367 JM |
791 | # if !defined (LDAV_DONE) && defined (apollo) |
792 | # define LDAV_DONE | |
1e5ba5b5 RM |
793 | /* Apollo code from lisch@mentorg.com (Ray Lischner). |
794 | ||
795 | This system call is not documented. The load average is obtained as | |
796 | three long integers, for the load average over the past minute, | |
797 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
798 | with 16 bits of integer part and 16 bits of fraction part. | |
799 | ||
800 | I'm not sure which operating system first supported this system call, | |
801 | but I know that SR10.2 supports it. */ | |
802 | ||
803 | extern void proc1_$get_loadav (); | |
804 | unsigned long load_ave[3]; | |
805 | ||
806 | proc1_$get_loadav (load_ave); | |
807 | ||
808 | if (nelem > 0) | |
809 | loadavg[elem++] = load_ave[0] / 65536.0; | |
810 | if (nelem > 1) | |
811 | loadavg[elem++] = load_ave[1] / 65536.0; | |
812 | if (nelem > 2) | |
813 | loadavg[elem++] = load_ave[2] / 65536.0; | |
3da4f367 | 814 | # endif /* apollo */ |
1e5ba5b5 | 815 | |
3da4f367 JM |
816 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
817 | # define LDAV_DONE | |
1e5ba5b5 RM |
818 | |
819 | struct tbl_loadavg load_ave; | |
820 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
821 | loadavg[elem++] |
822 | = (load_ave.tl_lscale == 0 | |
823 | ? load_ave.tl_avenrun.d[0] | |
824 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
3da4f367 | 825 | # endif /* OSF_MIPS */ |
1e5ba5b5 | 826 | |
383ebe49 | 827 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
3da4f367 | 828 | # define LDAV_DONE |
a7ee71e8 RS |
829 | |
830 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 831 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
832 | { |
833 | loadavg[elem] = 0.0; | |
834 | } | |
383ebe49 | 835 | # endif /* __MSDOS__ || WINDOWS32 */ |
a7ee71e8 | 836 | |
3da4f367 JM |
837 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
838 | # define LDAV_DONE | |
bbd619d7 RS |
839 | |
840 | struct tbl_loadavg load_ave; | |
841 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
842 | for (elem = 0; elem < nelem; elem++) | |
843 | loadavg[elem] | |
844 | = (load_ave.tl_lscale == 0 | |
845 | ? load_ave.tl_avenrun.d[elem] | |
846 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
3da4f367 | 847 | # endif /* OSF_ALPHA */ |
bbd619d7 | 848 | |
3da4f367 | 849 | # if !defined (LDAV_DONE) && defined (VMS) |
1e5ba5b5 RM |
850 | /* VMS specific code -- read from the Load Ave driver. */ |
851 | ||
852 | LOAD_AVE_TYPE load_ave[3]; | |
853 | static int getloadavg_initialized = 0; | |
3da4f367 | 854 | # ifdef eunice |
1e5ba5b5 RM |
855 | struct |
856 | { | |
857 | int dsc$w_length; | |
858 | char *dsc$a_pointer; | |
859 | } descriptor; | |
3da4f367 | 860 | # endif |
1e5ba5b5 RM |
861 | |
862 | /* Ensure that there is a channel open to the load ave device. */ | |
863 | if (!getloadavg_initialized) | |
864 | { | |
865 | /* Attempt to open the channel. */ | |
3da4f367 | 866 | # ifdef eunice |
1e5ba5b5 RM |
867 | descriptor.dsc$w_length = 18; |
868 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
3da4f367 | 869 | # else |
1e5ba5b5 | 870 | $DESCRIPTOR (descriptor, "LAV0:"); |
3da4f367 | 871 | # endif |
1e5ba5b5 RM |
872 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
873 | getloadavg_initialized = 1; | |
874 | } | |
875 | ||
876 | /* Read the load average vector. */ | |
877 | if (getloadavg_initialized | |
878 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
879 | load_ave, 12, 0, 0, 0, 0) & 1)) | |
880 | { | |
881 | sys$dassgn (channel); | |
882 | getloadavg_initialized = 0; | |
883 | } | |
884 | ||
885 | if (!getloadavg_initialized) | |
886 | return -1; | |
3da4f367 | 887 | # endif /* VMS */ |
1e5ba5b5 | 888 | |
3da4f367 | 889 | # if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) |
1e5ba5b5 RM |
890 | |
891 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
892 | ||
3da4f367 | 893 | # define LDAV_PRIVILEGED /* This code requires special installation. */ |
1e5ba5b5 RM |
894 | |
895 | LOAD_AVE_TYPE load_ave[3]; | |
896 | ||
897 | /* Get the address of LDAV_SYMBOL. */ | |
898 | if (offset == 0) | |
899 | { | |
3da4f367 JM |
900 | # ifndef sgi |
901 | # ifndef NLIST_STRUCT | |
1e5ba5b5 RM |
902 | strcpy (nl[0].n_name, LDAV_SYMBOL); |
903 | strcpy (nl[1].n_name, ""); | |
3da4f367 JM |
904 | # else /* NLIST_STRUCT */ |
905 | # ifdef NLIST_NAME_UNION | |
1e5ba5b5 RM |
906 | nl[0].n_un.n_name = LDAV_SYMBOL; |
907 | nl[1].n_un.n_name = 0; | |
3da4f367 | 908 | # else /* not NLIST_NAME_UNION */ |
1e5ba5b5 RM |
909 | nl[0].n_name = LDAV_SYMBOL; |
910 | nl[1].n_name = 0; | |
3da4f367 JM |
911 | # endif /* not NLIST_NAME_UNION */ |
912 | # endif /* NLIST_STRUCT */ | |
1e5ba5b5 | 913 | |
3da4f367 | 914 | # ifndef SUNOS_5 |
bc77c95c | 915 | if ( |
3da4f367 | 916 | # if !(defined (_AIX) && !defined (ps2)) |
bc77c95c | 917 | nlist (KERNEL_FILE, nl) |
3da4f367 | 918 | # else /* _AIX */ |
bc77c95c | 919 | knlist (nl, 1, sizeof (nl[0])) |
3da4f367 | 920 | # endif |
bc77c95c RM |
921 | >= 0) |
922 | /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ | |
923 | { | |
3da4f367 | 924 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
bc77c95c | 925 | FIXUP_KERNEL_SYMBOL_ADDR (nl); |
3da4f367 | 926 | # endif |
bc77c95c RM |
927 | offset = nl[0].n_value; |
928 | } | |
3da4f367 JM |
929 | # endif /* !SUNOS_5 */ |
930 | # else /* sgi */ | |
931 | int ldav_off; | |
932 | ||
933 | ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); | |
934 | if (ldav_off != -1) | |
935 | offset = (long) ldav_off & 0x7fffffff; | |
936 | # endif /* sgi */ | |
937 | } | |
1e5ba5b5 RM |
938 | |
939 | /* Make sure we have /dev/kmem open. */ | |
940 | if (!getloadavg_initialized) | |
941 | { | |
3da4f367 | 942 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
943 | channel = open ("/dev/kmem", 0); |
944 | if (channel >= 0) | |
00f7bd72 RM |
945 | { |
946 | /* Set the channel to close on exec, so it does not | |
947 | litter any child's descriptor table. */ | |
3da4f367 JM |
948 | # ifdef FD_SETFD |
949 | # ifndef FD_CLOEXEC | |
950 | # define FD_CLOEXEC 1 | |
951 | # endif | |
00f7bd72 | 952 | (void) fcntl (channel, F_SETFD, FD_CLOEXEC); |
3da4f367 | 953 | # endif |
00f7bd72 RM |
954 | getloadavg_initialized = 1; |
955 | } | |
3da4f367 | 956 | # else /* SUNOS_5 */ |
fb3ebe6c DM |
957 | /* We pass 0 for the kernel, corefile, and swapfile names |
958 | to use the currently running kernel. */ | |
1e5ba5b5 | 959 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 960 | if (kd != 0) |
1e5ba5b5 | 961 | { |
fb3ebe6c | 962 | /* nlist the currently running kernel. */ |
1e5ba5b5 | 963 | kvm_nlist (kd, nl); |
fb3ebe6c | 964 | offset = nl[0].n_value; |
1e5ba5b5 RM |
965 | getloadavg_initialized = 1; |
966 | } | |
3da4f367 | 967 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
968 | } |
969 | ||
970 | /* If we can, get the load average values. */ | |
971 | if (offset && getloadavg_initialized) | |
972 | { | |
973 | /* Try to read the load. */ | |
3da4f367 | 974 | # ifndef SUNOS_5 |
1e5ba5b5 RM |
975 | if (lseek (channel, offset, 0) == -1L |
976 | || read (channel, (char *) load_ave, sizeof (load_ave)) | |
977 | != sizeof (load_ave)) | |
978 | { | |
979 | close (channel); | |
980 | getloadavg_initialized = 0; | |
981 | } | |
3da4f367 | 982 | # else /* SUNOS_5 */ |
1e5ba5b5 RM |
983 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
984 | != sizeof (load_ave)) | |
985 | { | |
986 | kvm_close (kd); | |
987 | getloadavg_initialized = 0; | |
988 | } | |
3da4f367 | 989 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
990 | } |
991 | ||
992 | if (offset == 0 || !getloadavg_initialized) | |
993 | return -1; | |
3da4f367 | 994 | # endif /* LOAD_AVE_TYPE and not VMS */ |
1e5ba5b5 | 995 | |
3da4f367 | 996 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
1e5ba5b5 RM |
997 | if (nelem > 0) |
998 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
999 | if (nelem > 1) | |
1000 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
1001 | if (nelem > 2) | |
1002 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
1003 | ||
3da4f367 JM |
1004 | # define LDAV_DONE |
1005 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
1e5ba5b5 | 1006 | |
3da4f367 | 1007 | # ifdef LDAV_DONE |
1e5ba5b5 | 1008 | return elem; |
3da4f367 | 1009 | # else |
1e5ba5b5 RM |
1010 | /* Set errno to zero to indicate that there was no particular error; |
1011 | this function just can't work at all on this system. */ | |
1012 | errno = 0; | |
1013 | return -1; | |
3da4f367 | 1014 | # endif |
1e5ba5b5 | 1015 | } |
04402ae3 RM |
1016 | |
1017 | #endif /* ! HAVE_GETLOADAVG */ | |
1e5ba5b5 RM |
1018 | \f |
1019 | #ifdef TEST | |
1020 | void | |
1021 | main (argc, argv) | |
1022 | int argc; | |
1023 | char **argv; | |
1024 | { | |
1025 | int naptime = 0; | |
1026 | ||
1027 | if (argc > 1) | |
1028 | naptime = atoi (argv[1]); | |
1029 | ||
1e5ba5b5 RM |
1030 | while (1) |
1031 | { | |
1032 | double avg[3]; | |
1033 | int loads; | |
1034 | ||
1035 | errno = 0; /* Don't be misled if it doesn't set errno. */ | |
1036 | loads = getloadavg (avg, 3); | |
1037 | if (loads == -1) | |
1038 | { | |
1039 | perror ("Error getting load average"); | |
1040 | exit (1); | |
1041 | } | |
1042 | if (loads > 0) | |
1043 | printf ("1-minute: %f ", avg[0]); | |
1044 | if (loads > 1) | |
1045 | printf ("5-minute: %f ", avg[1]); | |
1046 | if (loads > 2) | |
1047 | printf ("15-minute: %f ", avg[2]); | |
1048 | if (loads > 0) | |
1049 | putchar ('\n'); | |
db6730c7 RM |
1050 | |
1051 | if (naptime == 0) | |
1052 | break; | |
1e5ba5b5 RM |
1053 | sleep (naptime); |
1054 | } | |
db6730c7 RM |
1055 | |
1056 | exit (0); | |
1e5ba5b5 RM |
1057 | } |
1058 | #endif /* TEST */ |