Commit | Line | Data |
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1e5ba5b5 | 1 | /* Get the system load averages. |
1f5d53eb | 2 | |
caf8a9b2 | 3 | Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2012 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 | |
31 | configure.in file. | |
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 | ||
1f5d53eb PE |
83 | /* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems |
84 | with partially-configured source directories. */ | |
df3dd7d6 | 85 | |
1f5d53eb PE |
86 | #ifndef CONFIGURING_GETLOADAVG |
87 | # include <config.h> | |
88 | # include <stdbool.h> | |
1e5ba5b5 RM |
89 | #endif |
90 | ||
1f5d53eb PE |
91 | /* Specification. */ |
92 | #include <stdlib.h> | |
39c5a83f RM |
93 | |
94 | #include <errno.h> | |
1f5d53eb | 95 | #include <stdio.h> |
39c5a83f | 96 | |
1f5d53eb | 97 | # include <sys/types.h> |
04402ae3 | 98 | |
1f5d53eb PE |
99 | /* Both the Emacs and non-Emacs sections want this. Some |
100 | configuration files' definitions for the LOAD_AVE_CVT macro (like | |
101 | sparc.h's) use macros like FSCALE, defined here. */ | |
102 | # if defined (unix) || defined (__unix) | |
103 | # include <sys/param.h> | |
104 | # endif | |
04402ae3 | 105 | |
1f5d53eb | 106 | # include "intprops.h" |
04402ae3 | 107 | |
1e5ba5b5 RM |
108 | /* The existing Emacs configuration files define a macro called |
109 | LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
110 | returns the load average multiplied by 100. What we actually want | |
111 | is a macro called LDAV_CVT, which returns the load average as an | |
112 | unmultiplied double. | |
113 | ||
114 | For backwards compatibility, we'll define LDAV_CVT in terms of | |
115 | LOAD_AVE_CVT, but future machine config files should just define | |
116 | LDAV_CVT directly. */ | |
117 | ||
1f5d53eb | 118 | # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT) |
3da4f367 JM |
119 | # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) |
120 | # endif | |
1e5ba5b5 | 121 | |
3da4f367 | 122 | # if !defined (BSD) && defined (ultrix) |
1e5ba5b5 | 123 | /* Ultrix behaves like BSD on Vaxen. */ |
3da4f367 JM |
124 | # define BSD |
125 | # endif | |
1e5ba5b5 | 126 | |
3da4f367 | 127 | # ifdef NeXT |
1e5ba5b5 RM |
128 | /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
129 | conflicts with the definition understood in this file, that this | |
130 | really is BSD. */ | |
3da4f367 | 131 | # undef BSD |
1e5ba5b5 RM |
132 | |
133 | /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
134 | defined to mean that the nlist method should be used, which is not true. */ | |
3da4f367 JM |
135 | # undef FSCALE |
136 | # endif | |
1e5ba5b5 | 137 | |
432eec29 RS |
138 | /* Same issues as for NeXT apply to the HURD-based GNU system. */ |
139 | # ifdef __GNU__ | |
140 | # undef BSD | |
141 | # undef FSCALE | |
142 | # endif /* __GNU__ */ | |
143 | ||
1e5ba5b5 RM |
144 | /* Set values that are different from the defaults, which are |
145 | set a little farther down with #ifndef. */ | |
146 | ||
147 | ||
148 | /* Some shorthands. */ | |
149 | ||
3da4f367 JM |
150 | # if defined (HPUX) && !defined (hpux) |
151 | # define hpux | |
152 | # endif | |
1e5ba5b5 | 153 | |
3da4f367 JM |
154 | # if defined (__hpux) && !defined (hpux) |
155 | # define hpux | |
156 | # endif | |
73a46a9c | 157 | |
3da4f367 JM |
158 | # if defined (__sun) && !defined (sun) |
159 | # define sun | |
160 | # endif | |
73a46a9c | 161 | |
1f5d53eb | 162 | # if defined (hp300) && !defined (hpux) |
3da4f367 JM |
163 | # define MORE_BSD |
164 | # endif | |
1e5ba5b5 | 165 | |
1f5d53eb | 166 | # if defined (ultrix) && defined (mips) |
3da4f367 JM |
167 | # define decstation |
168 | # endif | |
1e5ba5b5 | 169 | |
3da4f367 JM |
170 | # if defined (__SVR4) && !defined (SVR4) |
171 | # define SVR4 | |
172 | # endif | |
1e5ba5b5 | 173 | |
1f5d53eb | 174 | # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2) |
3da4f367 JM |
175 | # define SUNOS_5 |
176 | # endif | |
1e5ba5b5 | 177 | |
3da4f367 JM |
178 | # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
179 | # define OSF_ALPHA | |
e3cbb35e RS |
180 | # include <sys/mbuf.h> |
181 | # include <sys/socket.h> | |
182 | # include <net/route.h> | |
3da4f367 | 183 | # include <sys/table.h> |
1f5d53eb PE |
184 | /* Tru64 4.0D's table.h redefines sys */ |
185 | # undef sys | |
3da4f367 JM |
186 | # endif |
187 | ||
188 | # if defined (__osf__) && (defined (mips) || defined (__mips__)) | |
189 | # define OSF_MIPS | |
190 | # include <sys/table.h> | |
191 | # endif | |
1e5ba5b5 RM |
192 | |
193 | /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
194 | default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
195 | that with a couple of other things and we'll have a unique match. */ | |
3da4f367 | 196 | # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
1f5d53eb | 197 | # define tek4300 /* Define by emacs, but not by other users. */ |
3da4f367 | 198 | # endif |
1e5ba5b5 RM |
199 | |
200 | ||
8eda6c51 | 201 | /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ |
3da4f367 | 202 | # ifndef LOAD_AVE_TYPE |
5ac622b2 | 203 | |
3da4f367 JM |
204 | # ifdef MORE_BSD |
205 | # define LOAD_AVE_TYPE long | |
206 | # endif | |
8eda6c51 | 207 | |
3da4f367 JM |
208 | # ifdef sun |
209 | # define LOAD_AVE_TYPE long | |
210 | # endif | |
8eda6c51 | 211 | |
3da4f367 JM |
212 | # ifdef decstation |
213 | # define LOAD_AVE_TYPE long | |
214 | # endif | |
8eda6c51 | 215 | |
3da4f367 JM |
216 | # ifdef _SEQUENT_ |
217 | # define LOAD_AVE_TYPE long | |
218 | # endif | |
8eda6c51 | 219 | |
3da4f367 JM |
220 | # ifdef sgi |
221 | # define LOAD_AVE_TYPE long | |
222 | # endif | |
8eda6c51 | 223 | |
3da4f367 JM |
224 | # ifdef SVR4 |
225 | # define LOAD_AVE_TYPE long | |
226 | # endif | |
8eda6c51 | 227 | |
3da4f367 JM |
228 | # ifdef sony_news |
229 | # define LOAD_AVE_TYPE long | |
230 | # endif | |
8eda6c51 | 231 | |
3da4f367 JM |
232 | # ifdef sequent |
233 | # define LOAD_AVE_TYPE long | |
234 | # endif | |
8eda6c51 | 235 | |
3da4f367 JM |
236 | # ifdef OSF_ALPHA |
237 | # define LOAD_AVE_TYPE long | |
238 | # endif | |
8eda6c51 | 239 | |
3da4f367 JM |
240 | # if defined (ardent) && defined (titan) |
241 | # define LOAD_AVE_TYPE long | |
242 | # endif | |
8eda6c51 | 243 | |
3da4f367 JM |
244 | # ifdef tek4300 |
245 | # define LOAD_AVE_TYPE long | |
246 | # endif | |
1e5ba5b5 | 247 | |
1f5d53eb | 248 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
3da4f367 JM |
249 | # define LOAD_AVE_TYPE long |
250 | # endif | |
59c0e567 | 251 | |
1f5d53eb | 252 | # if defined _AIX && ! defined HAVE_LIBPERFSTAT |
3da4f367 JM |
253 | # define LOAD_AVE_TYPE long |
254 | # endif | |
bc77c95c | 255 | |
3da4f367 JM |
256 | # ifdef convex |
257 | # define LOAD_AVE_TYPE double | |
258 | # ifndef LDAV_CVT | |
259 | # define LDAV_CVT(n) (n) | |
260 | # endif | |
261 | # endif | |
91bf5fad | 262 | |
3da4f367 | 263 | # endif /* No LOAD_AVE_TYPE. */ |
1e5ba5b5 | 264 | |
3da4f367 | 265 | # ifdef OSF_ALPHA |
f870f3fe RM |
266 | /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
267 | according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
268 | # undef FSCALE |
269 | # define FSCALE 1024.0 | |
270 | # endif | |
f870f3fe | 271 | |
1f5d53eb | 272 | # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
bf074c06 RM |
273 | /* <sys/param.h> defines an incorrect value for FSCALE on an |
274 | Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
3da4f367 JM |
275 | # undef FSCALE |
276 | # define FSCALE 100.0 | |
277 | # endif | |
bf074c06 | 278 | |
f870f3fe | 279 | |
1f5d53eb | 280 | # ifndef FSCALE |
1e5ba5b5 RM |
281 | |
282 | /* SunOS and some others define FSCALE in sys/param.h. */ | |
283 | ||
3da4f367 JM |
284 | # ifdef MORE_BSD |
285 | # define FSCALE 2048.0 | |
286 | # endif | |
1e5ba5b5 | 287 | |
1f5d53eb | 288 | # if defined (MIPS) || defined (SVR4) || defined (decstation) |
3da4f367 JM |
289 | # define FSCALE 256 |
290 | # endif | |
1e5ba5b5 | 291 | |
3da4f367 | 292 | # if defined (sgi) || defined (sequent) |
934d56b7 RM |
293 | /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
294 | above under #ifdef MIPS. But we want the sgi value. */ | |
3da4f367 | 295 | # undef FSCALE |
87c35974 | 296 | # define FSCALE 1000.0 |
3da4f367 | 297 | # endif |
1e5ba5b5 | 298 | |
3da4f367 JM |
299 | # if defined (ardent) && defined (titan) |
300 | # define FSCALE 65536.0 | |
301 | # endif | |
1e5ba5b5 | 302 | |
3da4f367 JM |
303 | # ifdef tek4300 |
304 | # define FSCALE 100.0 | |
305 | # endif | |
59c0e567 | 306 | |
1f5d53eb | 307 | # if defined _AIX && !defined HAVE_LIBPERFSTAT |
3da4f367 JM |
308 | # define FSCALE 65536.0 |
309 | # endif | |
bc77c95c | 310 | |
1f5d53eb | 311 | # endif /* Not FSCALE. */ |
1e5ba5b5 | 312 | |
3da4f367 | 313 | # if !defined (LDAV_CVT) && defined (FSCALE) |
87c35974 | 314 | # define LDAV_CVT(n) (((double) (n)) / FSCALE) |
3da4f367 | 315 | # endif |
1e5ba5b5 | 316 | |
87c35974 DL |
317 | # ifndef NLIST_STRUCT |
318 | # if HAVE_NLIST_H | |
319 | # define NLIST_STRUCT | |
320 | # endif | |
321 | # endif | |
1e5ba5b5 | 322 | |
1f5d53eb | 323 | # if defined (sgi) || (defined (mips) && !defined (BSD)) |
3da4f367 JM |
324 | # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) |
325 | # endif | |
1e5ba5b5 RM |
326 | |
327 | ||
3da4f367 JM |
328 | # if !defined (KERNEL_FILE) && defined (sequent) |
329 | # define KERNEL_FILE "/dynix" | |
330 | # endif | |
1e5ba5b5 | 331 | |
3da4f367 JM |
332 | # if !defined (KERNEL_FILE) && defined (hpux) |
333 | # define KERNEL_FILE "/hp-ux" | |
334 | # endif | |
1e5ba5b5 | 335 | |
1f5d53eb | 336 | # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
3da4f367 JM |
337 | # define KERNEL_FILE "/unix" |
338 | # endif | |
1e5ba5b5 RM |
339 | |
340 | ||
3da4f367 JM |
341 | # if !defined (LDAV_SYMBOL) && defined (alliant) |
342 | # define LDAV_SYMBOL "_Loadavg" | |
343 | # endif | |
1e5ba5b5 | 344 | |
1f5d53eb | 345 | # 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 |
346 | # define LDAV_SYMBOL "avenrun" |
347 | # endif | |
1e5ba5b5 | 348 | |
4004364e | 349 | # include <unistd.h> |
1e5ba5b5 RM |
350 | |
351 | /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
352 | nlist method. */ | |
1f5d53eb | 353 | # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) |
3da4f367 JM |
354 | # define LOAD_AVE_TYPE double |
355 | # endif | |
356 | ||
357 | # ifdef LOAD_AVE_TYPE | |
358 | ||
1f5d53eb | 359 | # ifndef __VMS |
3da4f367 JM |
360 | # ifndef __linux__ |
361 | # ifndef NLIST_STRUCT | |
362 | # include <a.out.h> | |
363 | # else /* NLIST_STRUCT */ | |
364 | # include <nlist.h> | |
365 | # endif /* NLIST_STRUCT */ | |
366 | ||
367 | # ifdef SUNOS_5 | |
3da4f367 JM |
368 | # include <kvm.h> |
369 | # include <kstat.h> | |
370 | # endif | |
371 | ||
372 | # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) | |
373 | # include <sys/pstat.h> | |
374 | # endif | |
375 | ||
376 | # ifndef KERNEL_FILE | |
377 | # define KERNEL_FILE "/vmunix" | |
378 | # endif /* KERNEL_FILE */ | |
379 | ||
380 | # ifndef LDAV_SYMBOL | |
381 | # define LDAV_SYMBOL "_avenrun" | |
382 | # endif /* LDAV_SYMBOL */ | |
383 | # endif /* __linux__ */ | |
384 | ||
1f5d53eb | 385 | # else /* __VMS */ |
3da4f367 JM |
386 | |
387 | # ifndef eunice | |
388 | # include <iodef.h> | |
389 | # include <descrip.h> | |
390 | # else /* eunice */ | |
391 | # include <vms/iodef.h> | |
392 | # endif /* eunice */ | |
1f5d53eb | 393 | # endif /* __VMS */ |
3da4f367 JM |
394 | |
395 | # ifndef LDAV_CVT | |
396 | # define LDAV_CVT(n) ((double) (n)) | |
397 | # endif /* !LDAV_CVT */ | |
398 | ||
399 | # endif /* LOAD_AVE_TYPE */ | |
400 | ||
1f5d53eb PE |
401 | # if defined HAVE_LIBPERFSTAT |
402 | # include <sys/protosw.h> | |
403 | # include <libperfstat.h> | |
404 | # include <sys/proc.h> | |
405 | # ifndef SBITS | |
406 | # define SBITS 16 | |
407 | # endif | |
408 | # endif | |
409 | ||
410 | # if defined (__GNU__) && !defined (NeXT) | |
d282be16 RS |
411 | /* Note that NeXT Openstep defines __GNU__ even though it should not. */ |
412 | /* GNU system acts much like NeXT, for load average purposes, | |
413 | but not exactly. */ | |
2c30b2fc MB |
414 | # define NeXT |
415 | # define host_self mach_host_self | |
416 | # endif | |
417 | ||
db94bf9c | 418 | # ifdef NeXT |
3da4f367 JM |
419 | # ifdef HAVE_MACH_MACH_H |
420 | # include <mach/mach.h> | |
421 | # else | |
422 | # include <mach.h> | |
423 | # endif | |
424 | # endif /* NeXT */ | |
425 | ||
426 | # ifdef sgi | |
427 | # include <sys/sysmp.h> | |
428 | # endif /* sgi */ | |
429 | ||
430 | # ifdef UMAX | |
3da4f367 JM |
431 | # include <signal.h> |
432 | # include <sys/time.h> | |
433 | # include <sys/wait.h> | |
434 | # include <sys/syscall.h> | |
435 | ||
436 | # ifdef UMAX_43 | |
437 | # include <machine/cpu.h> | |
438 | # include <inq_stats/statistics.h> | |
439 | # include <inq_stats/sysstats.h> | |
440 | # include <inq_stats/cpustats.h> | |
441 | # include <inq_stats/procstats.h> | |
442 | # else /* Not UMAX_43. */ | |
443 | # include <sys/sysdefs.h> | |
444 | # include <sys/statistics.h> | |
445 | # include <sys/sysstats.h> | |
446 | # include <sys/cpudefs.h> | |
447 | # include <sys/cpustats.h> | |
448 | # include <sys/procstats.h> | |
449 | # endif /* Not UMAX_43. */ | |
450 | # endif /* UMAX */ | |
451 | ||
452 | # ifdef DGUX | |
453 | # include <sys/dg_sys_info.h> | |
454 | # endif | |
455 | ||
1f5d53eb PE |
456 | # if (defined __linux__ || defined __CYGWIN__ || defined SUNOS_5 \ |
457 | || (defined LOAD_AVE_TYPE && ! defined __VMS)) | |
3da4f367 | 458 | # include <fcntl.h> |
3da4f367 | 459 | # endif |
1e5ba5b5 RM |
460 | \f |
461 | /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
462 | ||
db94bf9c | 463 | # ifdef NeXT |
1e5ba5b5 | 464 | static processor_set_t default_set; |
1f5d53eb | 465 | static bool getloadavg_initialized; |
3da4f367 | 466 | # endif /* NeXT */ |
1e5ba5b5 | 467 | |
3da4f367 | 468 | # ifdef UMAX |
1e5ba5b5 RM |
469 | static unsigned int cpus = 0; |
470 | static unsigned int samples; | |
3da4f367 | 471 | # endif /* UMAX */ |
1e5ba5b5 | 472 | |
3da4f367 | 473 | # ifdef DGUX |
1f5d53eb | 474 | static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
3da4f367 | 475 | # endif /* DGUX */ |
1e5ba5b5 | 476 | |
1f5d53eb | 477 | # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE) |
1e5ba5b5 RM |
478 | /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
479 | static int channel; | |
1f5d53eb PE |
480 | /* True if channel is valid. */ |
481 | static bool getloadavg_initialized; | |
1e5ba5b5 RM |
482 | /* Offset in kmem to seek to read load average, or 0 means invalid. */ |
483 | static long offset; | |
484 | ||
1f5d53eb | 485 | # if ! defined __VMS && ! defined sgi && ! defined __linux__ |
f100213e | 486 | static struct nlist name_list[2]; |
1f5d53eb | 487 | # endif |
1e5ba5b5 | 488 | |
87c35974 | 489 | # ifdef SUNOS_5 |
1e5ba5b5 | 490 | static kvm_t *kd; |
87c35974 | 491 | # endif /* SUNOS_5 */ |
1e5ba5b5 | 492 | |
1f5d53eb | 493 | # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ |
1e5ba5b5 RM |
494 | \f |
495 | /* Put the 1 minute, 5 minute and 15 minute load averages | |
496 | into the first NELEM elements of LOADAVG. | |
039e9c8b | 497 | Return the number written (never more than 3, but may be less than NELEM), |
1f5d53eb | 498 | or -1 (setting errno) if an error occurred. */ |
1e5ba5b5 RM |
499 | |
500 | int | |
1f5d53eb | 501 | getloadavg (double loadavg[], int nelem) |
1e5ba5b5 | 502 | { |
1f5d53eb | 503 | int elem = 0; /* Return value. */ |
1e5ba5b5 | 504 | |
3da4f367 JM |
505 | # ifdef NO_GET_LOAD_AVG |
506 | # define LDAV_DONE | |
1f5d53eb | 507 | errno = ENOSYS; |
7ee260fe | 508 | elem = -1; |
3da4f367 | 509 | # endif |
7ee260fe | 510 | |
7d315eb6 | 511 | # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) /* Solaris <= 2.6 */ |
4e98d4fa | 512 | /* Use libkstat because we don't have to be root. */ |
3da4f367 | 513 | # define LDAV_DONE |
4e98d4fa RS |
514 | kstat_ctl_t *kc; |
515 | kstat_t *ksp; | |
516 | kstat_named_t *kn; | |
1f5d53eb | 517 | int saved_errno; |
4e98d4fa RS |
518 | |
519 | kc = kstat_open (); | |
3da4f367 JM |
520 | if (kc == 0) |
521 | return -1; | |
4e98d4fa | 522 | ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
1f5d53eb | 523 | if (ksp == 0) |
3da4f367 JM |
524 | return -1; |
525 | if (kstat_read (kc, ksp, 0) == -1) | |
526 | return -1; | |
73a46a9c | 527 | |
4e98d4fa RS |
528 | |
529 | kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
530 | if (kn == 0) | |
531 | { | |
532 | /* Return -1 if no load average information is available. */ | |
533 | nelem = 0; | |
534 | elem = -1; | |
535 | } | |
536 | ||
537 | if (nelem >= 1) | |
1f5d53eb | 538 | loadavg[elem++] = (double) kn->value.ul / FSCALE; |
4e98d4fa RS |
539 | |
540 | if (nelem >= 2) | |
541 | { | |
542 | kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
543 | if (kn != 0) | |
1f5d53eb PE |
544 | { |
545 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | |
546 | ||
547 | if (nelem >= 3) | |
548 | { | |
549 | kn = kstat_data_lookup (ksp, "avenrun_15min"); | |
550 | if (kn != 0) | |
551 | loadavg[elem++] = (double) kn->value.ul / FSCALE; | |
552 | } | |
553 | } | |
4e98d4fa RS |
554 | } |
555 | ||
1f5d53eb | 556 | saved_errno = errno; |
4e98d4fa | 557 | kstat_close (kc); |
1f5d53eb | 558 | errno = saved_errno; |
6b2e9efd | 559 | # endif /* HAVE_LIBKSTAT */ |
4e98d4fa | 560 | |
3da4f367 | 561 | # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
7d315eb6 | 562 | /* HP-UX */ |
3da4f367 JM |
563 | /* Use pstat_getdynamic() because we don't have to be root. */ |
564 | # define LDAV_DONE | |
565 | # undef LOAD_AVE_TYPE | |
1e5ba5b5 | 566 | |
3da4f367 JM |
567 | struct pst_dynamic dyn_info; |
568 | if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) | |
569 | return -1; | |
570 | if (nelem > 0) | |
571 | loadavg[elem++] = dyn_info.psd_avg_1_min; | |
572 | if (nelem > 1) | |
573 | loadavg[elem++] = dyn_info.psd_avg_5_min; | |
574 | if (nelem > 2) | |
575 | loadavg[elem++] = dyn_info.psd_avg_15_min; | |
576 | ||
577 | # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ | |
578 | ||
7d315eb6 | 579 | # if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT /* AIX */ |
1f5d53eb PE |
580 | # define LDAV_DONE |
581 | # undef LOAD_AVE_TYPE | |
582 | /* Use perfstat_cpu_total because we don't have to be root. */ | |
583 | { | |
584 | perfstat_cpu_total_t cpu_stats; | |
585 | int result = perfstat_cpu_total (NULL, &cpu_stats, sizeof cpu_stats, 1); | |
586 | if (result == -1) | |
587 | return result; | |
588 | loadavg[0] = cpu_stats.loadavg[0] / (double)(1 << SBITS); | |
589 | loadavg[1] = cpu_stats.loadavg[1] / (double)(1 << SBITS); | |
590 | loadavg[2] = cpu_stats.loadavg[2] / (double)(1 << SBITS); | |
591 | elem = 3; | |
592 | } | |
593 | # endif | |
594 | ||
595 | # if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__)) | |
7d315eb6 | 596 | /* Linux without glibc, Cygwin */ |
3da4f367 JM |
597 | # define LDAV_DONE |
598 | # undef LOAD_AVE_TYPE | |
599 | ||
600 | # ifndef LINUX_LDAV_FILE | |
601 | # define LINUX_LDAV_FILE "/proc/loadavg" | |
602 | # endif | |
1e5ba5b5 | 603 | |
1f5d53eb PE |
604 | char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")]; |
605 | char const *ptr = ldavgbuf; | |
606 | int fd, count, saved_errno; | |
1e5ba5b5 RM |
607 | |
608 | fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
609 | if (fd == -1) | |
610 | return -1; | |
1f5d53eb PE |
611 | count = read (fd, ldavgbuf, sizeof ldavgbuf - 1); |
612 | saved_errno = errno; | |
1e5ba5b5 | 613 | (void) close (fd); |
1f5d53eb | 614 | errno = saved_errno; |
1e5ba5b5 RM |
615 | if (count <= 0) |
616 | return -1; | |
1f5d53eb | 617 | ldavgbuf[count] = '\0'; |
1e5ba5b5 | 618 | |
1f5d53eb PE |
619 | for (elem = 0; elem < nelem; elem++) |
620 | { | |
621 | double numerator = 0; | |
622 | double denominator = 1; | |
623 | ||
624 | while (*ptr == ' ') | |
625 | ptr++; | |
1e5ba5b5 | 626 | |
1f5d53eb PE |
627 | /* Finish if this number is missing, and report an error if all |
628 | were missing. */ | |
629 | if (! ('0' <= *ptr && *ptr <= '9')) | |
630 | { | |
631 | if (elem == 0) | |
632 | { | |
633 | errno = ENOTSUP; | |
634 | return -1; | |
635 | } | |
636 | break; | |
637 | } | |
638 | ||
639 | while ('0' <= *ptr && *ptr <= '9') | |
640 | numerator = 10 * numerator + (*ptr++ - '0'); | |
641 | ||
642 | if (*ptr == '.') | |
643 | for (ptr++; '0' <= *ptr && *ptr <= '9'; ptr++) | |
644 | numerator = 10 * numerator + (*ptr - '0'), denominator *= 10; | |
645 | ||
646 | loadavg[elem++] = numerator / denominator; | |
647 | } | |
1e5ba5b5 RM |
648 | |
649 | return elem; | |
650 | ||
1f5d53eb | 651 | # endif /* __linux__ || __CYGWIN__ */ |
1e5ba5b5 | 652 | |
7d315eb6 | 653 | # if !defined (LDAV_DONE) && defined (__NetBSD__) /* NetBSD < 0.9 */ |
3da4f367 JM |
654 | # define LDAV_DONE |
655 | # undef LOAD_AVE_TYPE | |
9eb8034b | 656 | |
3da4f367 JM |
657 | # ifndef NETBSD_LDAV_FILE |
658 | # define NETBSD_LDAV_FILE "/kern/loadavg" | |
659 | # endif | |
9eb8034b RM |
660 | |
661 | unsigned long int load_ave[3], scale; | |
662 | int count; | |
663 | FILE *fp; | |
664 | ||
8f090e85 | 665 | fp = fopen (NETBSD_LDAV_FILE, "r"); |
9eb8034b RM |
666 | if (fp == NULL) |
667 | return -1; | |
668 | count = fscanf (fp, "%lu %lu %lu %lu\n", | |
1f5d53eb PE |
669 | &load_ave[0], &load_ave[1], &load_ave[2], |
670 | &scale); | |
9eb8034b RM |
671 | (void) fclose (fp); |
672 | if (count != 4) | |
1f5d53eb PE |
673 | { |
674 | errno = ENOTSUP; | |
675 | return -1; | |
676 | } | |
9eb8034b RM |
677 | |
678 | for (elem = 0; elem < nelem; elem++) | |
679 | loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
680 | ||
681 | return elem; | |
682 | ||
3da4f367 | 683 | # endif /* __NetBSD__ */ |
9eb8034b | 684 | |
7d315eb6 | 685 | # if !defined (LDAV_DONE) && defined (NeXT) /* NeXTStep */ |
3da4f367 | 686 | # define LDAV_DONE |
1e5ba5b5 RM |
687 | /* The NeXT code was adapted from iscreen 3.2. */ |
688 | ||
689 | host_t host; | |
690 | struct processor_set_basic_info info; | |
1f5d53eb | 691 | unsigned int info_count; |
1e5ba5b5 | 692 | |
039e9c8b DM |
693 | /* We only know how to get the 1-minute average for this system, |
694 | so even if the caller asks for more than 1, we only return 1. */ | |
1e5ba5b5 RM |
695 | |
696 | if (!getloadavg_initialized) | |
697 | { | |
698 | if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
1f5d53eb | 699 | getloadavg_initialized = true; |
1e5ba5b5 RM |
700 | } |
701 | ||
702 | if (getloadavg_initialized) | |
703 | { | |
704 | info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
705 | if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
1f5d53eb PE |
706 | (processor_set_info_t) &info, &info_count) |
707 | != KERN_SUCCESS) | |
708 | getloadavg_initialized = false; | |
1e5ba5b5 | 709 | else |
1f5d53eb PE |
710 | { |
711 | if (nelem > 0) | |
712 | loadavg[elem++] = (double) info.load_average / LOAD_SCALE; | |
713 | } | |
1e5ba5b5 RM |
714 | } |
715 | ||
716 | if (!getloadavg_initialized) | |
1f5d53eb PE |
717 | { |
718 | errno = ENOTSUP; | |
719 | return -1; | |
720 | } | |
3da4f367 | 721 | # endif /* NeXT */ |
1e5ba5b5 | 722 | |
3da4f367 JM |
723 | # if !defined (LDAV_DONE) && defined (UMAX) |
724 | # define LDAV_DONE | |
1e5ba5b5 RM |
725 | /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
726 | have a /dev/kmem. Information about the workings of the running kernel | |
727 | can be gathered with inq_stats system calls. | |
728 | We only know how to get the 1-minute average for this system. */ | |
729 | ||
730 | struct proc_summary proc_sum_data; | |
731 | struct stat_descr proc_info; | |
732 | double load; | |
733 | register unsigned int i, j; | |
734 | ||
735 | if (cpus == 0) | |
736 | { | |
737 | register unsigned int c, i; | |
738 | struct cpu_config conf; | |
739 | struct stat_descr desc; | |
740 | ||
741 | desc.sd_next = 0; | |
742 | desc.sd_subsys = SUBSYS_CPU; | |
743 | desc.sd_type = CPUTYPE_CONFIG; | |
744 | desc.sd_addr = (char *) &conf; | |
745 | desc.sd_size = sizeof conf; | |
746 | ||
747 | if (inq_stats (1, &desc)) | |
1f5d53eb | 748 | return -1; |
1e5ba5b5 RM |
749 | |
750 | c = 0; | |
751 | for (i = 0; i < conf.config_maxclass; ++i) | |
1f5d53eb PE |
752 | { |
753 | struct class_stats stats; | |
754 | memset (&stats, 0, sizeof stats); | |
1e5ba5b5 | 755 | |
1f5d53eb PE |
756 | desc.sd_type = CPUTYPE_CLASS; |
757 | desc.sd_objid = i; | |
758 | desc.sd_addr = (char *) &stats; | |
759 | desc.sd_size = sizeof stats; | |
1e5ba5b5 | 760 | |
1f5d53eb PE |
761 | if (inq_stats (1, &desc)) |
762 | return -1; | |
1e5ba5b5 | 763 | |
1f5d53eb PE |
764 | c += stats.class_numcpus; |
765 | } | |
1e5ba5b5 RM |
766 | cpus = c; |
767 | samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
768 | } | |
769 | ||
770 | proc_info.sd_next = 0; | |
771 | proc_info.sd_subsys = SUBSYS_PROC; | |
772 | proc_info.sd_type = PROCTYPE_SUMMARY; | |
773 | proc_info.sd_addr = (char *) &proc_sum_data; | |
774 | proc_info.sd_size = sizeof (struct proc_summary); | |
775 | proc_info.sd_sizeused = 0; | |
776 | ||
777 | if (inq_stats (1, &proc_info) != 0) | |
778 | return -1; | |
779 | ||
780 | load = proc_sum_data.ps_nrunnable; | |
781 | j = 0; | |
782 | for (i = samples - 1; i > 0; --i) | |
783 | { | |
784 | load += proc_sum_data.ps_nrun[j]; | |
785 | if (j++ == PS_NRUNSIZE) | |
1f5d53eb | 786 | j = 0; |
1e5ba5b5 RM |
787 | } |
788 | ||
789 | if (nelem > 0) | |
790 | loadavg[elem++] = load / samples / cpus; | |
3da4f367 | 791 | # endif /* UMAX */ |
1e5ba5b5 | 792 | |
3da4f367 JM |
793 | # if !defined (LDAV_DONE) && defined (DGUX) |
794 | # define LDAV_DONE | |
1e5ba5b5 RM |
795 | /* This call can return -1 for an error, but with good args |
796 | it's not supposed to fail. The first argument is for no | |
caf8a9b2 | 797 | apparent reason of type 'long int *'. */ |
1e5ba5b5 | 798 | dg_sys_info ((long int *) &load_info, |
1f5d53eb PE |
799 | DG_SYS_INFO_LOAD_INFO_TYPE, |
800 | DG_SYS_INFO_LOAD_VERSION_0); | |
1e5ba5b5 RM |
801 | |
802 | if (nelem > 0) | |
803 | loadavg[elem++] = load_info.one_minute; | |
804 | if (nelem > 1) | |
805 | loadavg[elem++] = load_info.five_minute; | |
806 | if (nelem > 2) | |
807 | loadavg[elem++] = load_info.fifteen_minute; | |
3da4f367 | 808 | # endif /* DGUX */ |
1e5ba5b5 | 809 | |
3da4f367 JM |
810 | # if !defined (LDAV_DONE) && defined (apollo) |
811 | # define LDAV_DONE | |
1e5ba5b5 RM |
812 | /* Apollo code from lisch@mentorg.com (Ray Lischner). |
813 | ||
814 | This system call is not documented. The load average is obtained as | |
815 | three long integers, for the load average over the past minute, | |
816 | five minutes, and fifteen minutes. Each value is a scaled integer, | |
817 | with 16 bits of integer part and 16 bits of fraction part. | |
818 | ||
819 | I'm not sure which operating system first supported this system call, | |
820 | but I know that SR10.2 supports it. */ | |
821 | ||
822 | extern void proc1_$get_loadav (); | |
823 | unsigned long load_ave[3]; | |
824 | ||
825 | proc1_$get_loadav (load_ave); | |
826 | ||
827 | if (nelem > 0) | |
828 | loadavg[elem++] = load_ave[0] / 65536.0; | |
829 | if (nelem > 1) | |
830 | loadavg[elem++] = load_ave[1] / 65536.0; | |
831 | if (nelem > 2) | |
832 | loadavg[elem++] = load_ave[2] / 65536.0; | |
3da4f367 | 833 | # endif /* apollo */ |
1e5ba5b5 | 834 | |
3da4f367 JM |
835 | # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
836 | # define LDAV_DONE | |
1e5ba5b5 RM |
837 | |
838 | struct tbl_loadavg load_ave; | |
839 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
7ee260fe RM |
840 | loadavg[elem++] |
841 | = (load_ave.tl_lscale == 0 | |
842 | ? load_ave.tl_avenrun.d[0] | |
843 | : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
1f5d53eb | 844 | # endif /* OSF_MIPS */ |
1e5ba5b5 | 845 | |
383ebe49 | 846 | # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
7d315eb6 | 847 | /* DJGPP */ |
3da4f367 | 848 | # define LDAV_DONE |
a7ee71e8 RS |
849 | |
850 | /* A faithful emulation is going to have to be saved for a rainy day. */ | |
26ff97e7 | 851 | for ( ; elem < nelem; elem++) |
a7ee71e8 RS |
852 | { |
853 | loadavg[elem] = 0.0; | |
854 | } | |
383ebe49 | 855 | # endif /* __MSDOS__ || WINDOWS32 */ |
a7ee71e8 | 856 | |
7d315eb6 | 857 | # if !defined (LDAV_DONE) && defined (OSF_ALPHA) /* OSF/1 */ |
3da4f367 | 858 | # define LDAV_DONE |
bbd619d7 RS |
859 | |
860 | struct tbl_loadavg load_ave; | |
861 | table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
862 | for (elem = 0; elem < nelem; elem++) | |
863 | loadavg[elem] | |
864 | = (load_ave.tl_lscale == 0 | |
1f5d53eb PE |
865 | ? load_ave.tl_avenrun.d[elem] |
866 | : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); | |
3da4f367 | 867 | # endif /* OSF_ALPHA */ |
bbd619d7 | 868 | |
7d315eb6 | 869 | # if ! defined LDAV_DONE && defined __VMS /* VMS */ |
1e5ba5b5 RM |
870 | /* VMS specific code -- read from the Load Ave driver. */ |
871 | ||
872 | LOAD_AVE_TYPE load_ave[3]; | |
1f5d53eb | 873 | static bool getloadavg_initialized; |
3da4f367 | 874 | # ifdef eunice |
1e5ba5b5 RM |
875 | struct |
876 | { | |
877 | int dsc$w_length; | |
878 | char *dsc$a_pointer; | |
879 | } descriptor; | |
3da4f367 | 880 | # endif |
1e5ba5b5 RM |
881 | |
882 | /* Ensure that there is a channel open to the load ave device. */ | |
883 | if (!getloadavg_initialized) | |
884 | { | |
885 | /* Attempt to open the channel. */ | |
3da4f367 | 886 | # ifdef eunice |
1e5ba5b5 RM |
887 | descriptor.dsc$w_length = 18; |
888 | descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
3da4f367 | 889 | # else |
1e5ba5b5 | 890 | $DESCRIPTOR (descriptor, "LAV0:"); |
3da4f367 | 891 | # endif |
1e5ba5b5 | 892 | if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
1f5d53eb | 893 | getloadavg_initialized = true; |
1e5ba5b5 RM |
894 | } |
895 | ||
896 | /* Read the load average vector. */ | |
897 | if (getloadavg_initialized | |
898 | && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
1f5d53eb | 899 | load_ave, 12, 0, 0, 0, 0) & 1)) |
1e5ba5b5 RM |
900 | { |
901 | sys$dassgn (channel); | |
1f5d53eb | 902 | getloadavg_initialized = false; |
1e5ba5b5 RM |
903 | } |
904 | ||
905 | if (!getloadavg_initialized) | |
1f5d53eb PE |
906 | { |
907 | errno = ENOTSUP; | |
908 | return -1; | |
909 | } | |
910 | # endif /* ! defined LDAV_DONE && defined __VMS */ | |
1e5ba5b5 | 911 | |
1f5d53eb | 912 | # if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS |
7d315eb6 | 913 | /* IRIX, other old systems */ |
1e5ba5b5 RM |
914 | |
915 | /* UNIX-specific code -- read the average from /dev/kmem. */ | |
916 | ||
1f5d53eb | 917 | # define LDAV_PRIVILEGED /* This code requires special installation. */ |
1e5ba5b5 RM |
918 | |
919 | LOAD_AVE_TYPE load_ave[3]; | |
920 | ||
921 | /* Get the address of LDAV_SYMBOL. */ | |
922 | if (offset == 0) | |
923 | { | |
3da4f367 | 924 | # ifndef sgi |
1f5d53eb | 925 | # if ! defined NLIST_STRUCT || ! defined N_NAME_POINTER |
f100213e CY |
926 | strcpy (name_list[0].n_name, LDAV_SYMBOL); |
927 | strcpy (name_list[1].n_name, ""); | |
3da4f367 | 928 | # else /* NLIST_STRUCT */ |
87c35974 | 929 | # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME |
f100213e CY |
930 | name_list[0].n_un.n_name = LDAV_SYMBOL; |
931 | name_list[1].n_un.n_name = 0; | |
87c35974 | 932 | # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
f100213e CY |
933 | name_list[0].n_name = LDAV_SYMBOL; |
934 | name_list[1].n_name = 0; | |
87c35974 | 935 | # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
3da4f367 | 936 | # endif /* NLIST_STRUCT */ |
1e5ba5b5 | 937 | |
3da4f367 | 938 | # ifndef SUNOS_5 |
bc77c95c | 939 | if ( |
3da4f367 | 940 | # if !(defined (_AIX) && !defined (ps2)) |
1f5d53eb | 941 | nlist (KERNEL_FILE, name_list) |
3da4f367 | 942 | # else /* _AIX */ |
1f5d53eb | 943 | knlist (name_list, 1, sizeof (name_list[0])) |
3da4f367 | 944 | # endif |
1f5d53eb PE |
945 | >= 0) |
946 | /* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */ | |
947 | { | |
3da4f367 | 948 | # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
1f5d53eb | 949 | FIXUP_KERNEL_SYMBOL_ADDR (name_list); |
3da4f367 | 950 | # endif |
1f5d53eb PE |
951 | offset = name_list[0].n_value; |
952 | } | |
3da4f367 JM |
953 | # endif /* !SUNOS_5 */ |
954 | # else /* sgi */ | |
7d315eb6 | 955 | ptrdiff_t ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); |
3da4f367 | 956 | if (ldav_off != -1) |
1f5d53eb | 957 | offset = (long int) ldav_off & 0x7fffffff; |
3da4f367 JM |
958 | # endif /* sgi */ |
959 | } | |
1e5ba5b5 RM |
960 | |
961 | /* Make sure we have /dev/kmem open. */ | |
962 | if (!getloadavg_initialized) | |
963 | { | |
3da4f367 | 964 | # ifndef SUNOS_5 |
1f5d53eb PE |
965 | /* Set the channel to close on exec, so it does not |
966 | litter any child's descriptor table. */ | |
967 | # ifndef O_CLOEXEC | |
968 | # define O_CLOEXEC 0 | |
3da4f367 | 969 | # endif |
1f5d53eb PE |
970 | int fd = open ("/dev/kmem", O_RDONLY | O_CLOEXEC); |
971 | if (0 <= fd) | |
972 | { | |
973 | # if F_DUPFD_CLOEXEC | |
974 | if (fd <= STDERR_FILENO) | |
975 | { | |
976 | int fd1 = fcntl (fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1); | |
977 | close (fd); | |
978 | fd = fd1; | |
979 | } | |
980 | # endif | |
981 | if (0 <= fd) | |
982 | { | |
983 | channel = fd; | |
984 | getloadavg_initialized = true; | |
985 | } | |
986 | } | |
3da4f367 | 987 | # else /* SUNOS_5 */ |
fb3ebe6c | 988 | /* We pass 0 for the kernel, corefile, and swapfile names |
1f5d53eb | 989 | to use the currently running kernel. */ |
1e5ba5b5 | 990 | kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
26ff97e7 | 991 | if (kd != 0) |
1f5d53eb PE |
992 | { |
993 | /* nlist the currently running kernel. */ | |
994 | kvm_nlist (kd, name_list); | |
995 | offset = name_list[0].n_value; | |
996 | getloadavg_initialized = true; | |
997 | } | |
3da4f367 | 998 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
999 | } |
1000 | ||
1001 | /* If we can, get the load average values. */ | |
1002 | if (offset && getloadavg_initialized) | |
1003 | { | |
1004 | /* Try to read the load. */ | |
3da4f367 | 1005 | # ifndef SUNOS_5 |
1e5ba5b5 | 1006 | if (lseek (channel, offset, 0) == -1L |
1f5d53eb PE |
1007 | || read (channel, (char *) load_ave, sizeof (load_ave)) |
1008 | != sizeof (load_ave)) | |
1009 | { | |
1010 | close (channel); | |
1011 | getloadavg_initialized = false; | |
1012 | } | |
3da4f367 | 1013 | # else /* SUNOS_5 */ |
1e5ba5b5 | 1014 | if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
1f5d53eb | 1015 | != sizeof (load_ave)) |
1e5ba5b5 RM |
1016 | { |
1017 | kvm_close (kd); | |
1f5d53eb PE |
1018 | getloadavg_initialized = false; |
1019 | } | |
3da4f367 | 1020 | # endif /* SUNOS_5 */ |
1e5ba5b5 RM |
1021 | } |
1022 | ||
1023 | if (offset == 0 || !getloadavg_initialized) | |
1f5d53eb PE |
1024 | { |
1025 | errno = ENOTSUP; | |
1026 | return -1; | |
1027 | } | |
1028 | # endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */ | |
1e5ba5b5 | 1029 | |
3da4f367 | 1030 | # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
1e5ba5b5 RM |
1031 | if (nelem > 0) |
1032 | loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
1033 | if (nelem > 1) | |
1034 | loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
1035 | if (nelem > 2) | |
1036 | loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
1037 | ||
3da4f367 JM |
1038 | # define LDAV_DONE |
1039 | # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ | |
1e5ba5b5 | 1040 | |
1f5d53eb PE |
1041 | # if !defined LDAV_DONE |
1042 | errno = ENOSYS; | |
1043 | elem = -1; | |
3da4f367 | 1044 | # endif |
1f5d53eb | 1045 | return elem; |
1e5ba5b5 | 1046 | } |