Commit | Line | Data |
---|---|---|
1e5ba5b5 | 1 | /* Get the system load averages. |
1f5d53eb | 2 | |
ab422c4d | 3 | Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2013 Free Software |
1f5d53eb | 4 | Foundation, Inc. |
1e5ba5b5 | 5 | |
87c35974 DL |
6 | NOTE: The canonical source of this file is maintained with gnulib. |
7 | Bugs can be reported to bug-gnulib@gnu.org. | |
8 | ||
1f5d53eb | 9 | This program is free software: you can redistribute it and/or modify |
1e5ba5b5 | 10 | it under the terms of the GNU General Public License as published by |
1f5d53eb PE |
11 | the Free Software Foundation; either version 3 of the License, or |
12 | (at your option) any later version. | |
1e5ba5b5 RM |
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 | |
1f5d53eb | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1e5ba5b5 RM |
21 | |
22 | /* Compile-time symbols that this file uses: | |
23 | ||
1f5d53eb | 24 | HAVE_PSTAT_GETDYNAMIC Define this if your system has the |
579c8381 | 25 | pstat_getdynamic function. I think it |
1f5d53eb PE |
26 | is unique to HPUX9. The best way to get the |
27 | definition is through the AC_FUNC_GETLOADAVG | |
28 | macro that comes with autoconf 2.13 or newer. | |
29 | If that isn't an option, then just put | |
30 | AC_CHECK_FUNCS(pstat_getdynamic) in your | |
2f93ecce | 31 | configure.ac file. |
1f5d53eb PE |
32 | HAVE_LIBPERFSTAT Define this if your system has the |
33 | perfstat_cpu_total function in libperfstat (AIX). | |
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; | |
102f4b17 | 42 | or we have libkstat; |
1f5d53eb | 43 | otherwise, no load average is available. |
87c35974 DL |
44 | HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults |
45 | to this. | |
1f5d53eb PE |
46 | NLIST_STRUCT Include nlist.h, not a.out.h. |
47 | N_NAME_POINTER The nlist n_name element is a pointer, | |
48 | not an array. | |
caf8a9b2 | 49 | HAVE_STRUCT_NLIST_N_UN_N_NAME 'n_un.n_name' is member of 'struct nlist'. |
1f5d53eb PE |
50 | LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing |
51 | load averages. | |
1e5ba5b5 RM |
52 | |
53 | Specific system predefines this file uses, aside from setting | |
54 | default values if not emacs: | |
55 | ||
56 | apollo | |
1f5d53eb | 57 | BSD Real BSD, not just BSD-like. |
91bf5fad | 58 | convex |
1e5ba5b5 | 59 | DGUX |
1f5d53eb | 60 | eunice UNIX emulator under VMS. |
1e5ba5b5 | 61 | hpux |
1f5d53eb | 62 | __MSDOS__ No-op for MSDOS. |
1e5ba5b5 RM |
63 | NeXT |
64 | sgi | |
1f5d53eb PE |
65 | sequent Sequent Dynix 3.x.x (BSD) |
66 | _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) | |
1e5ba5b5 RM |
67 | sony_news NEWS-OS (works at least for 4.1C) |
68 | UMAX | |
69 | UMAX4_3 | |
70 | VMS | |
1f5d53eb PE |
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. | |
1e5ba5b5 RM |
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 | ||
22ffb973 | 83 | #include <config.h> |
1e5ba5b5 | 84 | |
1f5d53eb PE |
85 | /* Specification. */ |
86 | #include <stdlib.h> | |
39c5a83f RM |
87 | |
88 | #include <errno.h> | |
22ffb973 | 89 | #include <stdbool.h> |
1f5d53eb | 90 | #include <stdio.h> |
39c5a83f | 91 | |
1f5d53eb | 92 | # include <sys/types.h> |
04402ae3 | 93 | |
22ffb973 | 94 | # if HAVE_SYS_PARAM_H |
1f5d53eb PE |
95 | # include <sys/param.h> |
96 | # endif | |
04402ae3 | 97 | |
1f5d53eb | 98 | # include "intprops.h" |
04402ae3 | 99 | |
3da4f367 | 100 | # if !defined (BSD) && defined (ultrix) |
1e5ba5b5 | 101 | /* Ultrix behaves like BSD on Vaxen. */ |
3da4f367 JM |
102 | # define BSD |
103 | # endif | |
1e5ba5b5 | 104 | |
3da4f367 | 105 | # ifdef NeXT |
1e5ba5b5 RM |
106 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
107 | conflicts with the definition understood in this file, that this | |
108 | really is BSD. */ | |
3da4f367 | 109 | # undef BSD |
1e5ba5b5 RM |
110 | |
111 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
112 | defined to mean that the nlist method should be used, which is not true. */ | |
3da4f367 JM |
113 | # undef FSCALE |
114 | # endif | |
1e5ba5b5 | 115 | |
432eec29 RS |
116 | /* Same issues as for NeXT apply to the HURD-based GNU system. */ |
117 | # ifdef __GNU__ | |
118 | # undef BSD | |
119 | # undef FSCALE | |
120 | # endif /* __GNU__ */ | |
121 | ||
1e5ba5b5 RM |
122 | /* Set values that are different from the defaults, which are |
123 | set a little farther down with #ifndef. */ | |
124 | ||
125 | ||
126 | /* Some shorthands. */ | |
127 | ||
3da4f367 JM |
128 | # if defined (HPUX) && !defined (hpux) |
129 | # define hpux | |
130 | # endif | |
1e5ba5b5 | 131 | |
3da4f367 JM |
132 | # if defined (__hpux) && !defined (hpux) |
133 | # define hpux | |
134 | # endif | |
73a46a9c | 135 | |
3da4f367 JM |
136 | # if defined (__sun) && !defined (sun) |
137 | # define sun | |
138 | # endif | |
73a46a9c | 139 | |
1f5d53eb | 140 | # if defined (hp300) && !defined (hpux) |
3da4f367 JM |
141 | # define MORE_BSD |
142 | # endif | |
1e5ba5b5 | 143 | |
1f5d53eb | 144 | # if defined (ultrix) && defined (mips) |
3da4f367 JM |
145 | # define decstation |
146 | # endif | |
1e5ba5b5 | 147 | |
3da4f367 JM |
148 | # if defined (__SVR4) && !defined (SVR4) |
149 | # define SVR4 | |
150 | # endif | |
1e5ba5b5 | 151 | |
1f5d53eb | 152 | # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2) |
3da4f367 JM |
153 | # define SUNOS_5 |
154 | # endif | |
1e5ba5b5 | 155 | |
3da4f367 JM |
156 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
157 | # define OSF_ALPHA | |
e3cbb35e RS |
158 | # include <sys/mbuf.h> |
159 | # include <sys/socket.h> | |
160 | # include <net/route.h> | |
3da4f367 | 161 | # include <sys/table.h> |
1f5d53eb PE |
162 | /* Tru64 4.0D's table.h redefines sys */ |
163 | # undef sys | |
3da4f367 JM |
164 | # endif |
165 | ||
166 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
167 | # define OSF_MIPS | |
168 | # include <sys/table.h> | |
169 | # endif | |
1e5ba5b5 RM |
170 | |
171 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
172 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
173 | that with a couple of other things and we'll have a unique match. */ | |
3da4f367 | 174 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
1f5d53eb | 175 | # define tek4300 /* Define by emacs, but not by other users. */ |
3da4f367 | 176 | # endif |
1e5ba5b5 RM |
177 | |
178 | ||
8eda6c51 | 179 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
3da4f367 | 180 | # ifndef LOAD_AVE_TYPE |
5ac622b2 | 181 | |
3da4f367 JM |
182 | # ifdef MORE_BSD |
183 | # define LOAD_AVE_TYPE long | |
184 | # endif | |
8eda6c51 | 185 | |
3da4f367 JM |
186 | # ifdef sun |
187 | # define LOAD_AVE_TYPE long | |
188 | # endif | |
8eda6c51 | 189 | |
3da4f367 JM |
190 | # ifdef decstation |
191 | # define LOAD_AVE_TYPE long | |
192 | # endif | |
8eda6c51 | 193 | |
3da4f367 JM |
194 | # ifdef _SEQUENT_ |
195 | # define LOAD_AVE_TYPE long | |
196 | # endif | |
8eda6c51 | 197 | |
3da4f367 JM |
198 | # ifdef sgi |
199 | # define LOAD_AVE_TYPE long | |
200 | # endif | |
8eda6c51 | 201 | |
3da4f367 JM |
202 | # ifdef SVR4 |
203 | # define LOAD_AVE_TYPE long | |
204 | # endif | |
8eda6c51 | 205 | |
3da4f367 JM |
206 | # ifdef sony_news |
207 | # define LOAD_AVE_TYPE long | |
208 | # endif | |
8eda6c51 | 209 | |
3da4f367 JM |
210 | # ifdef sequent |
211 | # define LOAD_AVE_TYPE long | |
212 | # endif | |
8eda6c51 | 213 | |
3da4f367 JM |
214 | # ifdef OSF_ALPHA |
215 | # define LOAD_AVE_TYPE long | |
216 | # endif | |
8eda6c51 | 217 | |
3da4f367 JM |
218 | # if defined (ardent) && defined (titan) |
219 | # define LOAD_AVE_TYPE long | |
220 | # endif | |
8eda6c51 | 221 | |
3da4f367 JM |
222 | # ifdef tek4300 |
223 | # define LOAD_AVE_TYPE long | |
224 | # endif | |
1e5ba5b5 | 225 | |
1f5d53eb | 226 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
3da4f367 JM |
227 | # define LOAD_AVE_TYPE long |
228 | # endif | |
59c0e567 | 229 | |
1f5d53eb | 230 | # if defined _AIX && ! defined HAVE_LIBPERFSTAT |
3da4f367 JM |
231 | # define LOAD_AVE_TYPE long |
232 | # endif | |
bc77c95c | 233 | |
3da4f367 JM |
234 | # ifdef convex |
235 | # define LOAD_AVE_TYPE double | |
236 | # ifndef LDAV_CVT | |
237 | # define LDAV_CVT(n) (n) | |
238 | # endif | |
239 | # endif | |
91bf5fad | 240 | |
3da4f367 | 241 | # endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 242 | |
3da4f367 | 243 | # ifdef OSF_ALPHA |
f870f3fe RM |
244 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
245 | according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
246 | # undef FSCALE |
247 | # define FSCALE 1024.0 | |
248 | # endif | |
f870f3fe | 249 | |
1f5d53eb | 250 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
bf074c06 RM |
251 | /* <sys/param.h> defines an incorrect value for FSCALE on an |
252 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
253 | # undef FSCALE |
254 | # define FSCALE 100.0 | |
255 | # endif | |
bf074c06 | 256 | |
f870f3fe | 257 | |
1f5d53eb | 258 | # ifndef FSCALE |
1e5ba5b5 RM |
259 | |
260 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
261 | ||
3da4f367 JM |
262 | # ifdef MORE_BSD |
263 | # define FSCALE 2048.0 | |
264 | # endif | |
1e5ba5b5 | 265 | |
1f5d53eb | 266 | # if defined (MIPS) || defined (SVR4) || defined (decstation) |
3da4f367 JM |
267 | # define FSCALE 256 |
268 | # endif | |
1e5ba5b5 | 269 | |
3da4f367 | 270 | # if defined (sgi) || defined (sequent) |
934d56b7 RM |
271 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
272 | above under #ifdef MIPS. But we want the sgi value. */ | |
3da4f367 | 273 | # undef FSCALE |
87c35974 | 274 | # define FSCALE 1000.0 |
3da4f367 | 275 | # endif |
1e5ba5b5 | 276 | |
3da4f367 JM |
277 | # if defined (ardent) && defined (titan) |
278 | # define FSCALE 65536.0 | |
279 | # endif | |
1e5ba5b5 | 280 | |
3da4f367 JM |
281 | # ifdef tek4300 |
282 | # define FSCALE 100.0 | |
283 | # endif | |
59c0e567 | 284 | |
1f5d53eb | 285 | # if defined _AIX && !defined HAVE_LIBPERFSTAT |
3da4f367 JM |
286 | # define FSCALE 65536.0 |
287 | # endif | |
bc77c95c | 288 | |
1f5d53eb | 289 | # endif /* Not FSCALE. */ |
1e5ba5b5 | 290 | |
3da4f367 | 291 | # if !defined (LDAV_CVT) && defined (FSCALE) |
87c35974 | 292 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) |
3da4f367 | 293 | # endif |
1e5ba5b5 | 294 | |
87c35974 DL |
295 | # ifndef NLIST_STRUCT |
296 | # if HAVE_NLIST_H | |
297 | # define NLIST_STRUCT | |
298 | # endif | |
299 | # endif | |
1e5ba5b5 | 300 | |
1f5d53eb | 301 | # if defined (sgi) || (defined (mips) && !defined (BSD)) |
3da4f367 JM |
302 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) |
303 | # endif | |
1e5ba5b5 RM |
304 | |
305 | ||
3da4f367 JM |
306 | # if !defined (KERNEL_FILE) && defined (sequent) |
307 | # define KERNEL_FILE "/dynix" | |
308 | # endif | |
1e5ba5b5 | 309 | |
3da4f367 JM |
310 | # if !defined (KERNEL_FILE) && defined (hpux) |
311 | # define KERNEL_FILE "/hp-ux" | |
312 | # endif | |
1e5ba5b5 | 313 | |
1f5d53eb | 314 | # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
3da4f367 JM |
315 | # define KERNEL_FILE "/unix" |
316 | # endif | |
1e5ba5b5 RM |
317 | |
318 | ||
3da4f367 JM |
319 | # if !defined (LDAV_SYMBOL) && defined (alliant) |
320 | # define LDAV_SYMBOL "_Loadavg" | |
321 | # endif | |
1e5ba5b5 | 322 | |
1f5d53eb | 323 | # if !defined (LDAV_SYMBOL) && ((defined (hpux) && !defined (hp9000s300)) || defined (_SEQUENT_) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)) || (defined (_AIX) && !defined(HAVE_LIBPERFSTAT))) |
3da4f367 JM |
324 | # define LDAV_SYMBOL "avenrun" |
325 | # endif | |
1e5ba5b5 | 326 | |
4004364e | 327 | # include <unistd.h> |
1e5ba5b5 RM |
328 | |
329 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
330 | nlist method. */ | |
1f5d53eb | 331 | # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) |
3da4f367 JM |
332 | # define LOAD_AVE_TYPE double |
333 | # endif | |
334 | ||
335 | # ifdef LOAD_AVE_TYPE | |
336 | ||
1f5d53eb | 337 | # ifndef __VMS |
3da4f367 JM |
338 | # ifndef __linux__ |
339 | # ifndef NLIST_STRUCT | |
340 | # include <a.out.h> | |
341 | # else /* NLIST_STRUCT */ | |
342 | # include <nlist.h> | |
343 | # endif /* NLIST_STRUCT */ | |
344 | ||
345 | # ifdef SUNOS_5 | |
3da4f367 JM |
346 | # include <kvm.h> |
347 | # include <kstat.h> | |
348 | # endif | |
349 | ||
350 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | |
351 | # include <sys/pstat.h> | |
352 | # endif | |
353 | ||
354 | # ifndef KERNEL_FILE | |
355 | # define KERNEL_FILE "/vmunix" | |
356 | # endif /* KERNEL_FILE */ | |
357 | ||
358 | # ifndef LDAV_SYMBOL | |
359 | # define LDAV_SYMBOL "_avenrun" | |
360 | # endif /* LDAV_SYMBOL */ | |
361 | # endif /* __linux__ */ | |
362 | ||
1f5d53eb | 363 | # else /* __VMS */ |
3da4f367 JM |
364 | |
365 | # ifndef eunice | |
366 | # include <iodef.h> | |
367 | # include <descrip.h> | |
368 | # else /* eunice */ | |
369 | # include <vms/iodef.h> | |
370 | # endif /* eunice */ | |
1f5d53eb | 371 | # endif /* __VMS */ |
3da4f367 JM |
372 | |
373 | # ifndef LDAV_CVT | |
374 | # define LDAV_CVT(n) ((double) (n)) | |
375 | # endif /* !LDAV_CVT */ | |
376 | ||
377 | # endif /* LOAD_AVE_TYPE */ | |
378 | ||
1f5d53eb PE |
379 | # if defined HAVE_LIBPERFSTAT |
380 | # include <sys/protosw.h> | |
381 | # include <libperfstat.h> | |
382 | # include <sys/proc.h> | |
383 | # ifndef SBITS | |
384 | # define SBITS 16 | |
385 | # endif | |
386 | # endif | |
387 | ||
388 | # if defined (__GNU__) && !defined (NeXT) | |
d282be16 RS |
389 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ |
390 | /* GNU system acts much like NeXT, for load average purposes, | |
391 | but not exactly. */ | |
2c30b2fc MB |
392 | # define NeXT |
393 | # define host_self mach_host_self | |
394 | # endif | |
395 | ||
db94bf9c | 396 | # ifdef NeXT |
3da4f367 JM |
397 | # ifdef HAVE_MACH_MACH_H |
398 | # include <mach/mach.h> | |
399 | # else | |
400 | # include <mach.h> | |
401 | # endif | |
402 | # endif /* NeXT */ | |
403 | ||
404 | # ifdef sgi | |
405 | # include <sys/sysmp.h> | |
406 | # endif /* sgi */ | |
407 | ||
408 | # ifdef UMAX | |
3da4f367 JM |
409 | # include <signal.h> |
410 | # include <sys/time.h> | |
411 | # include <sys/wait.h> | |
412 | # include <sys/syscall.h> | |
413 | ||
414 | # ifdef UMAX_43 | |
415 | # include <machine/cpu.h> | |
416 | # include <inq_stats/statistics.h> | |
417 | # include <inq_stats/sysstats.h> | |
418 | # include <inq_stats/cpustats.h> | |
419 | # include <inq_stats/procstats.h> | |
420 | # else /* Not UMAX_43. */ | |
421 | # include <sys/sysdefs.h> | |
422 | # include <sys/statistics.h> | |
423 | # include <sys/sysstats.h> | |
424 | # include <sys/cpudefs.h> | |
425 | # include <sys/cpustats.h> | |
426 | # include <sys/procstats.h> | |
427 | # endif /* Not UMAX_43. */ | |
428 | # endif /* UMAX */ | |
429 | ||
430 | # ifdef DGUX | |
431 | # include <sys/dg_sys_info.h> | |
432 | # endif | |
433 | ||
1f5d53eb PE |
434 | # if (defined __linux__ || defined __CYGWIN__ || defined SUNOS_5 \ |
435 | || (defined LOAD_AVE_TYPE && ! defined __VMS)) | |
3da4f367 | 436 | # include <fcntl.h> |
3da4f367 | 437 | # endif |
1e5ba5b5 RM |
438 | \f |
439 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
440 | ||
db94bf9c | 441 | # ifdef NeXT |
1e5ba5b5 | 442 | static processor_set_t default_set; |
1f5d53eb | 443 | static bool getloadavg_initialized; |
3da4f367 | 444 | # endif /* NeXT */ |
1e5ba5b5 | 445 | |
3da4f367 | 446 | # ifdef UMAX |
1e5ba5b5 RM |
447 | static unsigned int cpus = 0; |
448 | static unsigned int samples; | |
3da4f367 | 449 | # endif /* UMAX */ |
1e5ba5b5 | 450 | |
3da4f367 | 451 | # ifdef DGUX |
1f5d53eb | 452 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
3da4f367 | 453 | # endif /* DGUX */ |
1e5ba5b5 | 454 | |
1f5d53eb | 455 | # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE) |
1e5ba5b5 RM |
456 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
457 | static int channel; | |
1f5d53eb PE |
458 | /* True if channel is valid. */ |
459 | static bool getloadavg_initialized; | |
1e5ba5b5 RM |
460 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ |
461 | static long offset; | |
462 | ||
1f5d53eb | 463 | # if ! defined __VMS && ! defined sgi && ! defined __linux__ |
f100213e | 464 | static struct nlist name_list[2]; |
1f5d53eb | 465 | # endif |
1e5ba5b5 | 466 | |
87c35974 | 467 | # ifdef SUNOS_5 |
1e5ba5b5 | 468 | static kvm_t *kd; |
87c35974 | 469 | # endif /* SUNOS_5 */ |
1e5ba5b5 | 470 | |
1f5d53eb | 471 | # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ |
1e5ba5b5 RM |
472 | \f |
473 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
474 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 475 | Return the number written (never more than 3, but may be less than NELEM), |
1f5d53eb | 476 | or -1 (setting errno) if an error occurred. */ |
1e5ba5b5 RM |
477 | |
478 | int | |
1f5d53eb | 479 | getloadavg (double loadavg[], int nelem) |
1e5ba5b5 | 480 | { |
1f5d53eb | 481 | int elem = 0; /* Return value. */ |
1e5ba5b5 | 482 | |
3da4f367 JM |
483 | # ifdef NO_GET_LOAD_AVG |
484 | # define LDAV_DONE | |
1f5d53eb | 485 | errno = ENOSYS; |
7ee260fe | 486 | elem = -1; |
3da4f367 | 487 | # endif |
7ee260fe | 488 | |
7d315eb6 | 489 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) /* Solaris <= 2.6 */ |
4e98d4fa | 490 | /* Use libkstat because we don't have to be root. */ |
3da4f367 | 491 | # define LDAV_DONE |
4e98d4fa RS |
492 | kstat_ctl_t *kc; |
493 | kstat_t *ksp; | |
494 | kstat_named_t *kn; | |
1f5d53eb | 495 | int saved_errno; |
4e98d4fa RS |
496 | |
497 | kc = kstat_open (); | |
3da4f367 JM |
498 | if (kc == 0) |
499 | return -1; | |
4e98d4fa | 500 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
1f5d53eb | 501 | if (ksp == 0) |
3da4f367 JM |
502 | return -1; |
503 | if (kstat_read (kc, ksp, 0) == -1) | |
504 | return -1; | |
73a46a9c | 505 | |
4e98d4fa RS |
506 | |
507 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
508 | if (kn == 0) | |
509 | { | |
510 | /* Return -1 if no load average information is available. */ | |
511 | nelem = 0; | |
512 | elem = -1; | |
513 | } | |
514 | ||
515 | if (nelem >= 1) | |
1f5d53eb | 516 | loadavg[elem++] = (double) kn->value.ul / FSCALE; |
4e98d4fa RS |
517 | |
518 | if (nelem >= 2) | |
519 | { | |
520 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
521 | if (kn != 0) | |
1f5d53eb PE |
522 | { |
523 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | |
524 | ||
525 | if (nelem >= 3) | |
526 | { | |
527 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
528 | if (kn != 0) | |
529 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | |
530 | } | |
531 | } | |
4e98d4fa RS |
532 | } |
533 | ||
1f5d53eb | 534 | saved_errno = errno; |
4e98d4fa | 535 | kstat_close (kc); |
1f5d53eb | 536 | errno = saved_errno; |
6b2e9efd | 537 | # endif /* HAVE_LIBKSTAT */ |
4e98d4fa | 538 | |
3da4f367 | 539 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
7d315eb6 | 540 | /* HP-UX */ |
3da4f367 JM |
541 | /* Use pstat_getdynamic() because we don't have to be root. */ |
542 | # define LDAV_DONE | |
543 | # undef LOAD_AVE_TYPE | |
1e5ba5b5 | 544 | |
3da4f367 JM |
545 | struct pst_dynamic dyn_info; |
546 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | |
547 | return -1; | |
548 | if (nelem > 0) | |
549 | loadavg[elem++] = dyn_info.psd_avg_1_min; | |
550 | if (nelem > 1) | |
551 | loadavg[elem++] = dyn_info.psd_avg_5_min; | |
552 | if (nelem > 2) | |
553 | loadavg[elem++] = dyn_info.psd_avg_15_min; | |
554 | ||
555 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | |
556 | ||
7d315eb6 | 557 | # if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT /* AIX */ |
1f5d53eb PE |
558 | # define LDAV_DONE |
559 | # undef LOAD_AVE_TYPE | |
560 | /* Use perfstat_cpu_total because we don't have to be root. */ | |
561 | { | |
562 | perfstat_cpu_total_t cpu_stats; | |
563 | int result = perfstat_cpu_total (NULL, &cpu_stats, sizeof cpu_stats, 1); | |
564 | if (result == -1) | |
565 | return result; | |
566 | loadavg[0] = cpu_stats.loadavg[0] / (double)(1 << SBITS); | |
567 | loadavg[1] = cpu_stats.loadavg[1] / (double)(1 << SBITS); | |
568 | loadavg[2] = cpu_stats.loadavg[2] / (double)(1 << SBITS); | |
569 | elem = 3; | |
570 | } | |
571 | # endif | |
572 | ||
573 | # if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__)) | |
7d315eb6 | 574 | /* Linux without glibc, Cygwin */ |
3da4f367 JM |
575 | # define LDAV_DONE |
576 | # undef LOAD_AVE_TYPE | |
577 | ||
578 | # ifndef LINUX_LDAV_FILE | |
579 | # define LINUX_LDAV_FILE "/proc/loadavg" | |
580 | # endif | |
1e5ba5b5 | 581 | |
1f5d53eb PE |
582 | char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")]; |
583 | char const *ptr = ldavgbuf; | |
584 | int fd, count, saved_errno; | |
1e5ba5b5 RM |
585 | |
586 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
587 | if (fd == -1) | |
588 | return -1; | |
1f5d53eb PE |
589 | count = read (fd, ldavgbuf, sizeof ldavgbuf - 1); |
590 | saved_errno = errno; | |
1e5ba5b5 | 591 | (void) close (fd); |
1f5d53eb | 592 | errno = saved_errno; |
1e5ba5b5 RM |
593 | if (count <= 0) |
594 | return -1; | |
1f5d53eb | 595 | ldavgbuf[count] = '\0'; |
1e5ba5b5 | 596 | |
1f5d53eb PE |
597 | for (elem = 0; elem < nelem; elem++) |
598 | { | |
599 | double numerator = 0; | |
600 | double denominator = 1; | |
601 | ||
602 | while (*ptr == ' ') | |
603 | ptr++; | |
1e5ba5b5 | 604 | |
1f5d53eb PE |
605 | /* Finish if this number is missing, and report an error if all |
606 | were missing. */ | |
607 | if (! ('0' <= *ptr && *ptr <= '9')) | |
608 | { | |
609 | if (elem == 0) | |
610 | { | |
611 | errno = ENOTSUP; | |
612 | return -1; | |
613 | } | |
614 | break; | |
615 | } | |
616 | ||
617 | while ('0' <= *ptr && *ptr <= '9') | |
618 | numerator = 10 * numerator + (*ptr++ - '0'); | |
619 | ||
620 | if (*ptr == '.') | |
621 | for (ptr++; '0' <= *ptr && *ptr <= '9'; ptr++) | |
622 | numerator = 10 * numerator + (*ptr - '0'), denominator *= 10; | |
623 | ||
624 | loadavg[elem++] = numerator / denominator; | |
625 | } | |
1e5ba5b5 RM |
626 | |
627 | return elem; | |
628 | ||
1f5d53eb | 629 | # endif /* __linux__ || __CYGWIN__ */ |
1e5ba5b5 | 630 | |
7d315eb6 | 631 | # if !defined (LDAV_DONE) && defined (__NetBSD__) /* NetBSD < 0.9 */ |
3da4f367 JM |
632 | # define LDAV_DONE |
633 | # undef LOAD_AVE_TYPE | |
9eb8034b | 634 | |
3da4f367 JM |
635 | # ifndef NETBSD_LDAV_FILE |
636 | # define NETBSD_LDAV_FILE "/kern/loadavg" | |
637 | # endif | |
9eb8034b RM |
638 | |
639 | unsigned long int load_ave[3], scale; | |
640 | int count; | |
641 | FILE *fp; | |
642 | ||
8f090e85 | 643 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
644 | if (fp == NULL) |
645 | return -1; | |
646 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
1f5d53eb PE |
647 | &load_ave[0], &load_ave[1], &load_ave[2], |
648 | &scale); | |
9eb8034b RM |
649 | (void) fclose (fp); |
650 | if (count != 4) | |
1f5d53eb PE |
651 | { |
652 | errno = ENOTSUP; | |
653 | return -1; | |
654 | } | |
9eb8034b RM |
655 | |
656 | for (elem = 0; elem < nelem; elem++) | |
657 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
658 | ||
659 | return elem; | |
660 | ||
3da4f367 | 661 | # endif /* __NetBSD__ */ |
9eb8034b | 662 | |
7d315eb6 | 663 | # if !defined (LDAV_DONE) && defined (NeXT) /* NeXTStep */ |
3da4f367 | 664 | # define LDAV_DONE |
1e5ba5b5 RM |
665 | /* The NeXT code was adapted from iscreen 3.2. */ |
666 | ||
667 | host_t host; | |
668 | struct processor_set_basic_info info; | |
1f5d53eb | 669 | unsigned int info_count; |
1e5ba5b5 | 670 | |
039e9c8b DM |
671 | /* We only know how to get the 1-minute average for this system, |
672 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
673 | |
674 | if (!getloadavg_initialized) | |
675 | { | |
676 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
1f5d53eb | 677 | getloadavg_initialized = true; |
1e5ba5b5 RM |
678 | } |
679 | ||
680 | if (getloadavg_initialized) | |
681 | { | |
682 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
683 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
1f5d53eb PE |
684 | (processor_set_info_t) &info, &info_count) |
685 | != KERN_SUCCESS) | |
686 | getloadavg_initialized = false; | |
1e5ba5b5 | 687 | else |
1f5d53eb PE |
688 | { |
689 | if (nelem > 0) | |
690 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
691 | } | |
1e5ba5b5 RM |
692 | } |
693 | ||
694 | if (!getloadavg_initialized) | |
1f5d53eb PE |
695 | { |
696 | errno = ENOTSUP; | |
697 | return -1; | |
698 | } | |
3da4f367 | 699 | # endif /* NeXT */ |
1e5ba5b5 | 700 | |
3da4f367 JM |
701 | # if !defined (LDAV_DONE) && defined (UMAX) |
702 | # define LDAV_DONE | |
1e5ba5b5 RM |
703 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
704 | have a /dev/kmem. Information about the workings of the running kernel | |
705 | can be gathered with inq_stats system calls. | |
706 | We only know how to get the 1-minute average for this system. */ | |
707 | ||
708 | struct proc_summary proc_sum_data; | |
709 | struct stat_descr proc_info; | |
710 | double load; | |
711 | register unsigned int i, j; | |
712 | ||
713 | if (cpus == 0) | |
714 | { | |
715 | register unsigned int c, i; | |
716 | struct cpu_config conf; | |
717 | struct stat_descr desc; | |
718 | ||
719 | desc.sd_next = 0; | |
720 | desc.sd_subsys = SUBSYS_CPU; | |
721 | desc.sd_type = CPUTYPE_CONFIG; | |
722 | desc.sd_addr = (char *) &conf; | |
723 | desc.sd_size = sizeof conf; | |
724 | ||
725 | if (inq_stats (1, &desc)) | |
1f5d53eb | 726 | return -1; |
1e5ba5b5 RM |
727 | |
728 | c = 0; | |
729 | for (i = 0; i < conf.config_maxclass; ++i) | |
1f5d53eb PE |
730 | { |
731 | struct class_stats stats; | |
732 | memset (&stats, 0, sizeof stats); | |
1e5ba5b5 | 733 | |
1f5d53eb PE |
734 | desc.sd_type = CPUTYPE_CLASS; |
735 | desc.sd_objid = i; | |
736 | desc.sd_addr = (char *) &stats; | |
737 | desc.sd_size = sizeof stats; | |
1e5ba5b5 | 738 | |
1f5d53eb PE |
739 | if (inq_stats (1, &desc)) |
740 | return -1; | |
1e5ba5b5 | 741 | |
1f5d53eb PE |
742 | c += stats.class_numcpus; |
743 | } | |
1e5ba5b5 RM |
744 | cpus = c; |
745 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
746 | } | |
747 | ||
748 | proc_info.sd_next = 0; | |
749 | proc_info.sd_subsys = SUBSYS_PROC; | |
750 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
751 | proc_info.sd_addr = (char *) &proc_sum_data; | |
752 | proc_info.sd_size = sizeof (struct proc_summary); | |
753 | proc_info.sd_sizeused = 0; | |
754 | ||
755 | if (inq_stats (1, &proc_info) != 0) | |
756 | return -1; | |
757 | ||
758 | load = proc_sum_data.ps_nrunnable; | |
759 | j = 0; | |
760 | for (i = samples - 1; i > 0; --i) | |
761 | { | |
762 | load += proc_sum_data.ps_nrun[j]; | |
763 | if (j++ == PS_NRUNSIZE) | |
1f5d53eb | 764 | j = 0; |
1e5ba5b5 RM |
765 | } |
766 | ||
767 | if (nelem > 0) | |
768 | loadavg[elem++] = load / samples / cpus; | |
3da4f367 | 769 | # endif /* UMAX */ |
1e5ba5b5 | 770 | |
3da4f367 JM |
771 | # if !defined (LDAV_DONE) && defined (DGUX) |
772 | # define LDAV_DONE | |
1e5ba5b5 RM |
773 | /* This call can return -1 for an error, but with good args |
774 | it's not supposed to fail. The first argument is for no | |
caf8a9b2 | 775 | apparent reason of type 'long int *'. */ |
1e5ba5b5 | 776 | dg_sys_info ((long int *) &load_info, |
1f5d53eb PE |
777 | DG_SYS_INFO_LOAD_INFO_TYPE, |
778 | DG_SYS_INFO_LOAD_VERSION_0); | |
1e5ba5b5 RM |
779 | |
780 | if (nelem > 0) | |
781 | loadavg[elem++] = load_info.one_minute; | |
782 | if (nelem > 1) | |
783 | loadavg[elem++] = load_info.five_minute; | |
784 | if (nelem > 2) | |
785 | loadavg[elem++] = load_info.fifteen_minute; | |
3da4f367 | 786 | # endif /* DGUX */ |
1e5ba5b5 | 787 | |
3da4f367 JM |
788 | # if !defined (LDAV_DONE) && defined (apollo) |
789 | # define LDAV_DONE | |
1e5ba5b5 RM |
790 | /* Apollo code from lisch@mentorg.com (Ray Lischner). |
791 | ||
792 | This system call is not documented. The load average is obtained as | |
793 | three long integers, for the load average over the past minute, | |
794 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
795 | with 16 bits of integer part and 16 bits of fraction part. | |
796 | ||
797 | I'm not sure which operating system first supported this system call, | |
798 | but I know that SR10.2 supports it. */ | |
799 | ||
800 | extern void proc1_$get_loadav (); | |
801 | unsigned long load_ave[3]; | |
802 | ||
803 | proc1_$get_loadav (load_ave); | |
804 | ||
805 | if (nelem > 0) | |
806 | loadavg[elem++] = load_ave[0] / 65536.0; | |
807 | if (nelem > 1) | |
808 | loadavg[elem++] = load_ave[1] / 65536.0; | |
809 | if (nelem > 2) | |
810 | loadavg[elem++] = load_ave[2] / 65536.0; | |
3da4f367 | 811 | # endif /* apollo */ |
1e5ba5b5 | 812 | |
3da4f367 JM |
813 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
814 | # define LDAV_DONE | |
1e5ba5b5 RM |
815 | |
816 | struct tbl_loadavg load_ave; | |
817 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
818 | loadavg[elem++] |
819 | = (load_ave.tl_lscale == 0 | |
820 | ? load_ave.tl_avenrun.d[0] | |
821 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1f5d53eb | 822 | # endif /* OSF_MIPS */ |
1e5ba5b5 | 823 | |
383ebe49 | 824 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
7d315eb6 | 825 | /* DJGPP */ |
3da4f367 | 826 | # define LDAV_DONE |
a7ee71e8 RS |
827 | |
828 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 829 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
830 | { |
831 | loadavg[elem] = 0.0; | |
832 | } | |
383ebe49 | 833 | # endif /* __MSDOS__ || WINDOWS32 */ |
a7ee71e8 | 834 | |
7d315eb6 | 835 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) /* OSF/1 */ |
3da4f367 | 836 | # define LDAV_DONE |
bbd619d7 RS |
837 | |
838 | struct tbl_loadavg load_ave; | |
839 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
840 | for (elem = 0; elem < nelem; elem++) | |
841 | loadavg[elem] | |
842 | = (load_ave.tl_lscale == 0 | |
1f5d53eb PE |
843 | ? load_ave.tl_avenrun.d[elem] |
844 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
3da4f367 | 845 | # endif /* OSF_ALPHA */ |
bbd619d7 | 846 | |
7d315eb6 | 847 | # if ! defined LDAV_DONE && defined __VMS /* VMS */ |
1e5ba5b5 RM |
848 | /* VMS specific code -- read from the Load Ave driver. */ |
849 | ||
850 | LOAD_AVE_TYPE load_ave[3]; | |
1f5d53eb | 851 | static bool getloadavg_initialized; |
3da4f367 | 852 | # ifdef eunice |
1e5ba5b5 RM |
853 | struct |
854 | { | |
855 | int dsc$w_length; | |
856 | char *dsc$a_pointer; | |
857 | } descriptor; | |
3da4f367 | 858 | # endif |
1e5ba5b5 RM |
859 | |
860 | /* Ensure that there is a channel open to the load ave device. */ | |
861 | if (!getloadavg_initialized) | |
862 | { | |
863 | /* Attempt to open the channel. */ | |
3da4f367 | 864 | # ifdef eunice |
1e5ba5b5 RM |
865 | descriptor.dsc$w_length = 18; |
866 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
3da4f367 | 867 | # else |
1e5ba5b5 | 868 | $DESCRIPTOR (descriptor, "LAV0:"); |
3da4f367 | 869 | # endif |
1e5ba5b5 | 870 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
1f5d53eb | 871 | getloadavg_initialized = true; |
1e5ba5b5 RM |
872 | } |
873 | ||
874 | /* Read the load average vector. */ | |
875 | if (getloadavg_initialized | |
876 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
1f5d53eb | 877 | load_ave, 12, 0, 0, 0, 0) & 1)) |
1e5ba5b5 RM |
878 | { |
879 | sys$dassgn (channel); | |
1f5d53eb | 880 | getloadavg_initialized = false; |
1e5ba5b5 RM |
881 | } |
882 | ||
883 | if (!getloadavg_initialized) | |
1f5d53eb PE |
884 | { |
885 | errno = ENOTSUP; | |
886 | return -1; | |
887 | } | |
888 | # endif /* ! defined LDAV_DONE && defined __VMS */ | |
1e5ba5b5 | 889 | |
1f5d53eb | 890 | # if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS |
7d315eb6 | 891 | /* IRIX, other old systems */ |
1e5ba5b5 RM |
892 | |
893 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
894 | ||
1f5d53eb | 895 | # define LDAV_PRIVILEGED /* This code requires special installation. */ |
1e5ba5b5 RM |
896 | |
897 | LOAD_AVE_TYPE load_ave[3]; | |
898 | ||
899 | /* Get the address of LDAV_SYMBOL. */ | |
900 | if (offset == 0) | |
901 | { | |
3da4f367 | 902 | # ifndef sgi |
1f5d53eb | 903 | # if ! defined NLIST_STRUCT || ! defined N_NAME_POINTER |
f100213e CY |
904 | strcpy (name_list[0].n_name, LDAV_SYMBOL); |
905 | strcpy (name_list[1].n_name, ""); | |
3da4f367 | 906 | # else /* NLIST_STRUCT */ |
87c35974 | 907 | # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME |
f100213e CY |
908 | name_list[0].n_un.n_name = LDAV_SYMBOL; |
909 | name_list[1].n_un.n_name = 0; | |
87c35974 | 910 | # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
f100213e CY |
911 | name_list[0].n_name = LDAV_SYMBOL; |
912 | name_list[1].n_name = 0; | |
87c35974 | 913 | # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
3da4f367 | 914 | # endif /* NLIST_STRUCT */ |
1e5ba5b5 | 915 | |
3da4f367 | 916 | # ifndef SUNOS_5 |
bc77c95c | 917 | if ( |
3da4f367 | 918 | # if !(defined (_AIX) && !defined (ps2)) |
1f5d53eb | 919 | nlist (KERNEL_FILE, name_list) |
3da4f367 | 920 | # else /* _AIX */ |
1f5d53eb | 921 | knlist (name_list, 1, sizeof (name_list[0])) |
3da4f367 | 922 | # endif |
1f5d53eb PE |
923 | >= 0) |
924 | /* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */ | |
925 | { | |
3da4f367 | 926 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
1f5d53eb | 927 | FIXUP_KERNEL_SYMBOL_ADDR (name_list); |
3da4f367 | 928 | # endif |
1f5d53eb PE |
929 | offset = name_list[0].n_value; |
930 | } | |
3da4f367 JM |
931 | # endif /* !SUNOS_5 */ |
932 | # else /* sgi */ | |
7d315eb6 | 933 | ptrdiff_t ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); |
3da4f367 | 934 | if (ldav_off != -1) |
1f5d53eb | 935 | offset = (long int) ldav_off & 0x7fffffff; |
3da4f367 JM |
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 |
1f5d53eb PE |
943 | /* Set the channel to close on exec, so it does not |
944 | litter any child's descriptor table. */ | |
945 | # ifndef O_CLOEXEC | |
946 | # define O_CLOEXEC 0 | |
3da4f367 | 947 | # endif |
1f5d53eb PE |
948 | int fd = open ("/dev/kmem", O_RDONLY | O_CLOEXEC); |
949 | if (0 <= fd) | |
950 | { | |
951 | # if F_DUPFD_CLOEXEC | |
952 | if (fd <= STDERR_FILENO) | |
953 | { | |
954 | int fd1 = fcntl (fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1); | |
955 | close (fd); | |
956 | fd = fd1; | |
957 | } | |
958 | # endif | |
959 | if (0 <= fd) | |
960 | { | |
961 | channel = fd; | |
962 | getloadavg_initialized = true; | |
963 | } | |
964 | } | |
3da4f367 | 965 | # else /* SUNOS_5 */ |
fb3ebe6c | 966 | /* We pass 0 for the kernel, corefile, and swapfile names |
1f5d53eb | 967 | to use the currently running kernel. */ |
1e5ba5b5 | 968 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 969 | if (kd != 0) |
1f5d53eb PE |
970 | { |
971 | /* nlist the currently running kernel. */ | |
972 | kvm_nlist (kd, name_list); | |
973 | offset = name_list[0].n_value; | |
974 | getloadavg_initialized = true; | |
975 | } | |
3da4f367 | 976 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
977 | } |
978 | ||
979 | /* If we can, get the load average values. */ | |
980 | if (offset && getloadavg_initialized) | |
981 | { | |
982 | /* Try to read the load. */ | |
3da4f367 | 983 | # ifndef SUNOS_5 |
1e5ba5b5 | 984 | if (lseek (channel, offset, 0) == -1L |
1f5d53eb PE |
985 | || read (channel, (char *) load_ave, sizeof (load_ave)) |
986 | != sizeof (load_ave)) | |
987 | { | |
988 | close (channel); | |
989 | getloadavg_initialized = false; | |
990 | } | |
3da4f367 | 991 | # else /* SUNOS_5 */ |
1e5ba5b5 | 992 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
1f5d53eb | 993 | != sizeof (load_ave)) |
1e5ba5b5 RM |
994 | { |
995 | kvm_close (kd); | |
1f5d53eb PE |
996 | getloadavg_initialized = false; |
997 | } | |
3da4f367 | 998 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
999 | } |
1000 | ||
1001 | if (offset == 0 || !getloadavg_initialized) | |
1f5d53eb PE |
1002 | { |
1003 | errno = ENOTSUP; | |
1004 | return -1; | |
1005 | } | |
1006 | # endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */ | |
1e5ba5b5 | 1007 | |
3da4f367 | 1008 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
1e5ba5b5 RM |
1009 | if (nelem > 0) |
1010 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
1011 | if (nelem > 1) | |
1012 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
1013 | if (nelem > 2) | |
1014 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
1015 | ||
3da4f367 JM |
1016 | # define LDAV_DONE |
1017 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
1e5ba5b5 | 1018 | |
1f5d53eb PE |
1019 | # if !defined LDAV_DONE |
1020 | errno = ENOSYS; | |
1021 | elem = -1; | |
3da4f367 | 1022 | # endif |
1f5d53eb | 1023 | return elem; |
1e5ba5b5 | 1024 | } |