Mercurial > gnulib
annotate lib/getloadavg.c @ 14313:dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
See the thread rooted at
<http://lists.gnu.org/archive/html/bug-gnulib/2011-02/msg00090.html>.
* lib/getloadavg.c: Do not include c-strtod.h, cloexec.h, or fcntl--.h.
Include <fcntl.h> only if (defined __linux__ || defined __CYGWIN__
|| defined SUNOS_5 || (defined LOAD_AVE_TYPE && ! defined
__VMS)); previously it was always included (via fcntl--.h).
(getloadavg): Do not use c_strtod. Instead, approximate it by
hand; this is good enough for load averages. Also, do not use
set_cloexec_flag; instead, use the O_CLOEXEC and F_DUPFD_CLOEXEC
flags directly if available and don't bother otherwise. (Packages
that need the extra reliability should use the modules that define
these flags on older platforms that lack them.)
* modules/getloadavg (Depends-on): Remove c-strtod, cloexec,
fcntl-safer.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Tue, 08 Feb 2011 12:23:29 -0800 |
| parents | df2f4af88efc |
| children | 861ed5edf8e0 |
| rev | line source |
|---|---|
| 584 | 1 /* Get the system load averages. |
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2 |
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3 Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2011 Free Software |
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4 Foundation, Inc. |
| 584 | 5 |
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6 NOTE: The canonical source of this file is maintained with gnulib. |
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7 Bugs can be reported to bug-gnulib@gnu.org. |
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8 |
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9 This program is free software: you can redistribute it and/or modify |
| 584 | 10 it under the terms of the GNU General Public License as published by |
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11 the Free Software Foundation; either version 3 of the License, or |
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12 (at your option) any later version. |
| 584 | 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 | |
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20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 584 | 21 |
| 22 /* Compile-time symbols that this file uses: | |
| 23 | |
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24 HAVE_PSTAT_GETDYNAMIC Define this if your system has the |
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25 pstat_getdynamic function. I think it |
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26 is unique to HPUX9. The best way to get the |
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27 definition is through the AC_FUNC_GETLOADAVG |
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28 macro that comes with autoconf 2.13 or newer. |
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29 If that isn't an option, then just put |
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30 AC_CHECK_FUNCS(pstat_getdynamic) in your |
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31 configure.in file. |
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32 HAVE_LIBPERFSTAT Define this if your system has the |
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33 perfstat_cpu_total function in libperfstat (AIX). |
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34 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. |
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35 KERNEL_FILE Name of the kernel file to nlist. |
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36 LDAV_CVT() Scale the load average from the kernel. |
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37 Returns a double. |
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38 LDAV_SYMBOL Name of kernel symbol giving load average. |
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39 LOAD_AVE_TYPE Type of the load average array in the kernel. |
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40 Must be defined unless one of |
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41 apollo, DGUX, NeXT, or UMAX is defined; |
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42 or we have libkstat; |
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43 otherwise, no load average is available. |
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44 HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults |
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45 to this. |
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46 NLIST_STRUCT Include nlist.h, not a.out.h. |
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47 N_NAME_POINTER The nlist n_name element is a pointer, |
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48 not an array. |
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49 HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'. |
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50 LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing |
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51 load averages. |
| 584 | 52 |
| 53 Specific system predefines this file uses, aside from setting | |
| 54 default values if not emacs: | |
| 55 | |
| 56 apollo | |
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57 BSD Real BSD, not just BSD-like. |
| 584 | 58 convex |
| 59 DGUX | |
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60 eunice UNIX emulator under VMS. |
| 584 | 61 hpux |
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62 __MSDOS__ No-op for MSDOS. |
| 584 | 63 NeXT |
| 64 sgi | |
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65 sequent Sequent Dynix 3.x.x (BSD) |
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66 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV) |
| 584 | 67 sony_news NEWS-OS (works at least for 4.1C) |
| 68 UMAX | |
| 69 UMAX4_3 | |
| 70 VMS | |
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71 WINDOWS32 No-op for Windows95/NT. |
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72 __linux__ Linux: assumes /proc file system mounted. |
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73 Support from Michael K. Johnson. |
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74 __CYGWIN__ Cygwin emulates linux /proc/loadavg. |
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75 __NetBSD__ NetBSD: assumes /kern file system mounted. |
| 584 | 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 | |
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83 /* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems |
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84 with partially-configured source directories. */ |
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85 |
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86 #ifndef CONFIGURING_GETLOADAVG |
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87 # include <config.h> |
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88 # include <stdbool.h> |
| 584 | 89 #endif |
| 90 | |
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91 /* Specification. */ |
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92 #include <stdlib.h> |
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93 |
| 5159 | 94 #include <errno.h> |
| 95 #include <stdio.h> | |
| 96 | |
| 97 /* Exclude all the code except the test program at the end | |
| 98 if the system has its own `getloadavg' function. */ | |
| 99 | |
| 100 #ifndef HAVE_GETLOADAVG | |
| 101 | |
| 102 # include <sys/types.h> | |
| 584 | 103 |
| 104 /* Both the Emacs and non-Emacs sections want this. Some | |
| 105 configuration files' definitions for the LOAD_AVE_CVT macro (like | |
| 106 sparc.h's) use macros like FSCALE, defined here. */ | |
| 5159 | 107 # if defined (unix) || defined (__unix) |
| 108 # include <sys/param.h> | |
| 109 # endif | |
| 584 | 110 |
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111 # include "intprops.h" |
| 584 | 112 |
| 113 /* The existing Emacs configuration files define a macro called | |
| 114 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and | |
| 115 returns the load average multiplied by 100. What we actually want | |
| 116 is a macro called LDAV_CVT, which returns the load average as an | |
| 117 unmultiplied double. | |
| 118 | |
| 119 For backwards compatibility, we'll define LDAV_CVT in terms of | |
| 120 LOAD_AVE_CVT, but future machine config files should just define | |
| 121 LDAV_CVT directly. */ | |
| 122 | |
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123 # if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT) |
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124 # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) |
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125 # endif |
| 584 | 126 |
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127 # if !defined (BSD) && defined (ultrix) |
| 584 | 128 /* Ultrix behaves like BSD on Vaxen. */ |
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129 # define BSD |
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130 # endif |
| 584 | 131 |
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132 # ifdef NeXT |
| 584 | 133 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which |
| 134 conflicts with the definition understood in this file, that this | |
| 135 really is BSD. */ | |
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136 # undef BSD |
| 584 | 137 |
| 138 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being | |
| 139 defined to mean that the nlist method should be used, which is not true. */ | |
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140 # undef FSCALE |
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141 # endif |
| 584 | 142 |
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143 /* Same issues as for NeXT apply to the HURD-based GNU system. */ |
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144 # ifdef __GNU__ |
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145 # undef BSD |
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146 # undef FSCALE |
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147 # endif /* __GNU__ */ |
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148 |
| 584 | 149 /* Set values that are different from the defaults, which are |
| 150 set a little farther down with #ifndef. */ | |
| 151 | |
| 152 | |
| 153 /* Some shorthands. */ | |
| 154 | |
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155 # if defined (HPUX) && !defined (hpux) |
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156 # define hpux |
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157 # endif |
| 584 | 158 |
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159 # if defined (__hpux) && !defined (hpux) |
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160 # define hpux |
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161 # endif |
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162 |
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163 # if defined (__sun) && !defined (sun) |
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164 # define sun |
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165 # endif |
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166 |
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167 # if defined (hp300) && !defined (hpux) |
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168 # define MORE_BSD |
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169 # endif |
| 584 | 170 |
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171 # if defined (ultrix) && defined (mips) |
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172 # define decstation |
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173 # endif |
| 584 | 174 |
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175 # if defined (__SVR4) && !defined (SVR4) |
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176 # define SVR4 |
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177 # endif |
| 798 | 178 |
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179 # if (defined (sun) && defined (SVR4)) || defined (SOLARIS2) |
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180 # define SUNOS_5 |
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181 # endif |
| 584 | 182 |
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183 # if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) |
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184 # define OSF_ALPHA |
| 986 | 185 # include <sys/mbuf.h> |
| 186 # include <sys/socket.h> | |
| 187 # include <net/route.h> | |
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188 # include <sys/table.h> |
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189 /* Tru64 4.0D's table.h redefines sys */ |
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190 # undef sys |
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191 # endif |
| 584 | 192 |
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193 # if defined (__osf__) && (defined (mips) || defined (__mips__)) |
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194 # define OSF_MIPS |
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195 # include <sys/table.h> |
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196 # endif |
| 584 | 197 |
| 198 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by | |
| 199 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine | |
| 200 that with a couple of other things and we'll have a unique match. */ | |
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201 # if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) |
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202 # define tek4300 /* Define by emacs, but not by other users. */ |
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203 # endif |
| 584 | 204 |
| 205 | |
| 206 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ | |
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207 # ifndef LOAD_AVE_TYPE |
| 584 | 208 |
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209 # ifdef MORE_BSD |
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210 # define LOAD_AVE_TYPE long |
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211 # endif |
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213 # ifdef sun |
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214 # define LOAD_AVE_TYPE long |
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215 # endif |
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217 # ifdef decstation |
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218 # define LOAD_AVE_TYPE long |
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219 # endif |
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221 # ifdef _SEQUENT_ |
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222 # define LOAD_AVE_TYPE long |
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223 # endif |
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225 # ifdef sgi |
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226 # define LOAD_AVE_TYPE long |
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227 # endif |
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229 # ifdef SVR4 |
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230 # define LOAD_AVE_TYPE long |
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231 # endif |
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233 # ifdef sony_news |
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234 # define LOAD_AVE_TYPE long |
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235 # endif |
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237 # ifdef sequent |
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238 # define LOAD_AVE_TYPE long |
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239 # endif |
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241 # ifdef OSF_ALPHA |
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242 # define LOAD_AVE_TYPE long |
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243 # endif |
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245 # if defined (ardent) && defined (titan) |
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246 # define LOAD_AVE_TYPE long |
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247 # endif |
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249 # ifdef tek4300 |
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250 # define LOAD_AVE_TYPE long |
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251 # endif |
| 584 | 252 |
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253 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
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254 # define LOAD_AVE_TYPE long |
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255 # endif |
| 584 | 256 |
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257 # if defined _AIX && ! defined HAVE_LIBPERFSTAT |
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258 # define LOAD_AVE_TYPE long |
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259 # endif |
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261 # ifdef convex |
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262 # define LOAD_AVE_TYPE double |
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263 # ifndef LDAV_CVT |
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264 # define LDAV_CVT(n) (n) |
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265 # endif |
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266 # endif |
| 584 | 267 |
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268 # endif /* No LOAD_AVE_TYPE. */ |
| 584 | 269 |
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270 # ifdef OSF_ALPHA |
| 584 | 271 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1, |
| 272 according to ghazi@noc.rutgers.edu. */ | |
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273 # undef FSCALE |
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274 # define FSCALE 1024.0 |
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275 # endif |
| 584 | 276 |
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277 # if defined (alliant) && defined (i860) /* Alliant FX/2800 */ |
| 584 | 278 /* <sys/param.h> defines an incorrect value for FSCALE on an |
| 279 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ | |
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280 # undef FSCALE |
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281 # define FSCALE 100.0 |
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282 # endif |
| 584 | 283 |
| 284 | |
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285 # ifndef FSCALE |
| 584 | 286 |
| 287 /* SunOS and some others define FSCALE in sys/param.h. */ | |
| 288 | |
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289 # ifdef MORE_BSD |
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290 # define FSCALE 2048.0 |
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291 # endif |
| 584 | 292 |
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293 # if defined (MIPS) || defined (SVR4) || defined (decstation) |
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294 # define FSCALE 256 |
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295 # endif |
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297 # if defined (sgi) || defined (sequent) |
| 584 | 298 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined |
| 299 above under #ifdef MIPS. But we want the sgi value. */ | |
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300 # undef FSCALE |
| 987 | 301 # define FSCALE 1000.0 |
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302 # endif |
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304 # if defined (ardent) && defined (titan) |
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305 # define FSCALE 65536.0 |
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306 # endif |
| 584 | 307 |
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308 # ifdef tek4300 |
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309 # define FSCALE 100.0 |
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310 # endif |
| 584 | 311 |
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312 # if defined _AIX && !defined HAVE_LIBPERFSTAT |
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313 # define FSCALE 65536.0 |
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314 # endif |
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316 # endif /* Not FSCALE. */ |
| 584 | 317 |
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318 # if !defined (LDAV_CVT) && defined (FSCALE) |
| 987 | 319 # define LDAV_CVT(n) (((double) (n)) / FSCALE) |
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320 # endif |
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322 # ifndef NLIST_STRUCT |
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323 # if HAVE_NLIST_H |
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324 # define NLIST_STRUCT |
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325 # endif |
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326 # endif |
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327 |
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328 # if defined (sgi) || (defined (mips) && !defined (BSD)) |
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329 # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) |
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330 # endif |
| 584 | 331 |
| 332 | |
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333 # if !defined (KERNEL_FILE) && defined (sequent) |
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334 # define KERNEL_FILE "/dynix" |
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335 # endif |
| 584 | 336 |
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337 # if !defined (KERNEL_FILE) && defined (hpux) |
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338 # define KERNEL_FILE "/hp-ux" |
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339 # endif |
| 584 | 340 |
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341 # if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) |
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342 # define KERNEL_FILE "/unix" |
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343 # endif |
| 584 | 344 |
| 345 | |
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346 # if !defined (LDAV_SYMBOL) && defined (alliant) |
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347 # define LDAV_SYMBOL "_Loadavg" |
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348 # endif |
| 584 | 349 |
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350 # 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))) |
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351 # define LDAV_SYMBOL "avenrun" |
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352 # endif |
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354 # include <unistd.h> |
| 584 | 355 |
| 356 /* LOAD_AVE_TYPE should only get defined if we're going to use the | |
| 357 nlist method. */ | |
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358 # if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) |
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359 # define LOAD_AVE_TYPE double |
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360 # endif |
| 584 | 361 |
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362 # ifdef LOAD_AVE_TYPE |
| 584 | 363 |
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364 # ifndef __VMS |
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365 # ifndef __linux__ |
| 2609 | 366 # ifndef NLIST_STRUCT |
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367 # include <a.out.h> |
| 2609 | 368 # else /* NLIST_STRUCT */ |
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369 # include <nlist.h> |
| 2609 | 370 # endif /* NLIST_STRUCT */ |
| 584 | 371 |
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372 # ifdef SUNOS_5 |
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373 # include <kvm.h> |
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374 # include <kstat.h> |
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375 # endif |
| 584 | 376 |
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377 # if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
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378 # include <sys/pstat.h> |
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379 # endif |
| 584 | 380 |
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381 # ifndef KERNEL_FILE |
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382 # define KERNEL_FILE "/vmunix" |
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383 # endif /* KERNEL_FILE */ |
| 584 | 384 |
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385 # ifndef LDAV_SYMBOL |
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386 # define LDAV_SYMBOL "_avenrun" |
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387 # endif /* LDAV_SYMBOL */ |
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388 # endif /* __linux__ */ |
| 584 | 389 |
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390 # else /* __VMS */ |
| 584 | 391 |
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392 # ifndef eunice |
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393 # include <iodef.h> |
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394 # include <descrip.h> |
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395 # else /* eunice */ |
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396 # include <vms/iodef.h> |
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397 # endif /* eunice */ |
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398 # endif /* __VMS */ |
| 584 | 399 |
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400 # ifndef LDAV_CVT |
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401 # define LDAV_CVT(n) ((double) (n)) |
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402 # endif /* !LDAV_CVT */ |
| 584 | 403 |
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404 # endif /* LOAD_AVE_TYPE */ |
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405 |
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406 # if defined HAVE_LIBPERFSTAT |
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407 # include <sys/protosw.h> |
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408 # include <libperfstat.h> |
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409 # include <sys/proc.h> |
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410 # ifndef SBITS |
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411 # define SBITS 16 |
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412 # endif |
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413 # endif |
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414 |
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415 # if defined (__GNU__) && !defined (NeXT) |
| 986 | 416 /* Note that NeXT Openstep defines __GNU__ even though it should not. */ |
| 417 /* GNU system acts much like NeXT, for load average purposes, | |
| 418 but not exactly. */ | |
| 419 # define NeXT | |
| 420 # define host_self mach_host_self | |
| 421 # endif | |
| 422 | |
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423 # ifdef NeXT |
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424 # ifdef HAVE_MACH_MACH_H |
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425 # include <mach/mach.h> |
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426 # else |
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427 # include <mach.h> |
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428 # endif |
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429 # endif /* NeXT */ |
| 584 | 430 |
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431 # ifdef sgi |
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432 # include <sys/sysmp.h> |
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433 # endif /* sgi */ |
| 584 | 434 |
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435 # ifdef UMAX |
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436 # include <signal.h> |
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437 # include <sys/time.h> |
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438 # include <sys/wait.h> |
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439 # include <sys/syscall.h> |
| 584 | 440 |
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441 # ifdef UMAX_43 |
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442 # include <machine/cpu.h> |
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443 # include <inq_stats/statistics.h> |
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444 # include <inq_stats/sysstats.h> |
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445 # include <inq_stats/cpustats.h> |
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446 # include <inq_stats/procstats.h> |
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447 # else /* Not UMAX_43. */ |
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448 # include <sys/sysdefs.h> |
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449 # include <sys/statistics.h> |
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450 # include <sys/sysstats.h> |
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451 # include <sys/cpudefs.h> |
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452 # include <sys/cpustats.h> |
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453 # include <sys/procstats.h> |
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454 # endif /* Not UMAX_43. */ |
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455 # endif /* UMAX */ |
| 584 | 456 |
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457 # ifdef DGUX |
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458 # include <sys/dg_sys_info.h> |
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459 # endif |
| 584 | 460 |
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461 # if (defined __linux__ || defined __CYGWIN__ || defined SUNOS_5 \ |
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462 || (defined LOAD_AVE_TYPE && ! defined __VMS)) |
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463 # include <fcntl.h> |
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464 # endif |
| 584 | 465 |
| 466 /* Avoid static vars inside a function since in HPUX they dump as pure. */ | |
| 467 | |
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468 # ifdef NeXT |
| 584 | 469 static processor_set_t default_set; |
| 5159 | 470 static bool getloadavg_initialized; |
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471 # endif /* NeXT */ |
| 584 | 472 |
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473 # ifdef UMAX |
| 584 | 474 static unsigned int cpus = 0; |
| 475 static unsigned int samples; | |
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476 # endif /* UMAX */ |
| 584 | 477 |
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478 # ifdef DGUX |
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479 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ |
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480 # endif /* DGUX */ |
| 584 | 481 |
| 4704 | 482 # if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE) |
| 584 | 483 /* File descriptor open to /dev/kmem or VMS load ave driver. */ |
| 484 static int channel; | |
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485 /* True if channel is valid. */ |
| 5159 | 486 static bool getloadavg_initialized; |
| 584 | 487 /* Offset in kmem to seek to read load average, or 0 means invalid. */ |
| 488 static long offset; | |
| 489 | |
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490 # if ! defined __VMS && ! defined sgi && ! defined __linux__ |
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491 static struct nlist name_list[2]; |
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492 # endif |
| 584 | 493 |
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494 # ifdef SUNOS_5 |
| 584 | 495 static kvm_t *kd; |
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496 # endif /* SUNOS_5 */ |
| 584 | 497 |
| 4704 | 498 # endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ |
| 584 | 499 |
| 500 /* Put the 1 minute, 5 minute and 15 minute load averages | |
| 501 into the first NELEM elements of LOADAVG. | |
| 502 Return the number written (never more than 3, but may be less than NELEM), | |
| 503 or -1 if an error occurred. */ | |
| 504 | |
| 505 int | |
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506 getloadavg (double loadavg[], int nelem) |
| 584 | 507 { |
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508 int elem = 0; /* Return value. */ |
| 584 | 509 |
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510 # ifdef NO_GET_LOAD_AVG |
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511 # define LDAV_DONE |
| 584 | 512 /* Set errno to zero to indicate that there was no particular error; |
| 513 this function just can't work at all on this system. */ | |
| 514 errno = 0; | |
| 515 elem = -1; | |
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516 # endif |
| 584 | 517 |
| 986 | 518 # if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) |
| 694 | 519 /* Use libkstat because we don't have to be root. */ |
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520 # define LDAV_DONE |
| 694 | 521 kstat_ctl_t *kc; |
| 522 kstat_t *ksp; | |
| 523 kstat_named_t *kn; | |
| 524 | |
| 525 kc = kstat_open (); | |
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526 if (kc == 0) |
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527 return -1; |
| 694 | 528 ksp = kstat_lookup (kc, "unix", 0, "system_misc"); |
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529 if (ksp == 0) |
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530 return -1; |
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531 if (kstat_read (kc, ksp, 0) == -1) |
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532 return -1; |
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533 |
| 694 | 534 |
| 535 kn = kstat_data_lookup (ksp, "avenrun_1min"); | |
| 536 if (kn == 0) | |
| 537 { | |
| 538 /* Return -1 if no load average information is available. */ | |
| 539 nelem = 0; | |
| 540 elem = -1; | |
| 541 } | |
| 542 | |
| 543 if (nelem >= 1) | |
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544 loadavg[elem++] = (double) kn->value.ul / FSCALE; |
| 694 | 545 |
| 546 if (nelem >= 2) | |
| 547 { | |
| 548 kn = kstat_data_lookup (ksp, "avenrun_5min"); | |
| 549 if (kn != 0) | |
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550 { |
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551 loadavg[elem++] = (double) kn->value.ul / FSCALE; |
| 694 | 552 |
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553 if (nelem >= 3) |
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554 { |
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555 kn = kstat_data_lookup (ksp, "avenrun_15min"); |
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556 if (kn != 0) |
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557 loadavg[elem++] = (double) kn->value.ul / FSCALE; |
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558 } |
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559 } |
| 694 | 560 } |
| 561 | |
| 562 kstat_close (kc); | |
| 986 | 563 # endif /* HAVE_LIBKSTAT */ |
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564 |
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565 # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) |
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566 /* Use pstat_getdynamic() because we don't have to be root. */ |
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567 # define LDAV_DONE |
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568 # undef LOAD_AVE_TYPE |
| 694 | 569 |
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570 struct pst_dynamic dyn_info; |
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571 if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) |
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572 return -1; |
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573 if (nelem > 0) |
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574 loadavg[elem++] = dyn_info.psd_avg_1_min; |
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575 if (nelem > 1) |
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576 loadavg[elem++] = dyn_info.psd_avg_5_min; |
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577 if (nelem > 2) |
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578 loadavg[elem++] = dyn_info.psd_avg_15_min; |
| 584 | 579 |
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580 # endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ |
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581 |
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582 # if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT |
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583 # define LDAV_DONE |
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584 # undef LOAD_AVE_TYPE |
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585 /* Use perfstat_cpu_total because we don't have to be root. */ |
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586 { |
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587 perfstat_cpu_total_t cpu_stats; |
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588 int result = perfstat_cpu_total (NULL, &cpu_stats, sizeof cpu_stats, 1); |
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589 if (result == -1) |
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590 return result; |
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591 loadavg[0] = cpu_stats.loadavg[0] / (double)(1 << SBITS); |
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592 loadavg[1] = cpu_stats.loadavg[1] / (double)(1 << SBITS); |
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593 loadavg[2] = cpu_stats.loadavg[2] / (double)(1 << SBITS); |
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594 elem = 3; |
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595 } |
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596 # endif |
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597 |
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598 # if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__)) |
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599 # define LDAV_DONE |
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600 # undef LOAD_AVE_TYPE |
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601 |
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602 # ifndef LINUX_LDAV_FILE |
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603 # define LINUX_LDAV_FILE "/proc/loadavg" |
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604 # endif |
| 584 | 605 |
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606 char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")]; |
| 5159 | 607 char const *ptr = ldavgbuf; |
| 584 | 608 int fd, count; |
| 609 | |
| 610 fd = open (LINUX_LDAV_FILE, O_RDONLY); | |
| 611 if (fd == -1) | |
| 612 return -1; | |
| 5159 | 613 count = read (fd, ldavgbuf, sizeof ldavgbuf - 1); |
| 584 | 614 (void) close (fd); |
| 615 if (count <= 0) | |
| 616 return -1; | |
| 5159 | 617 ldavgbuf[count] = '\0'; |
| 584 | 618 |
| 5159 | 619 for (elem = 0; elem < nelem; elem++) |
| 620 { | |
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621 double numerator = 0; |
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622 double denominator = 1; |
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623 bool have_digit = false; |
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624 |
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625 while (*ptr == ' ') |
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626 ptr++; |
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627 |
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628 /* Finish if this number is missing, and report an error if all |
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629 were missing. */ |
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630 if (! ('0' <= *ptr && *ptr <= '9')) |
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631 { |
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632 if (elem == 0) |
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633 return -1; |
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634 break; |
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635 } |
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636 |
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637 while ('0' <= *ptr && *ptr <= '9') |
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638 numerator = 10 * numerator + (*ptr++ - '0'); |
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639 |
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640 if (*ptr == '.') |
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641 for (ptr++; '0' <= *ptr && *ptr <= '9'; ptr++) |
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642 numerator = 10 * numerator + (*ptr - '0'), denominator *= 10; |
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643 |
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644 loadavg[elem++] = numerator / denominator; |
| 5159 | 645 } |
| 584 | 646 |
| 647 return elem; | |
| 648 | |
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649 # endif /* __linux__ || __CYGWIN__ */ |
| 584 | 650 |
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651 # if !defined (LDAV_DONE) && defined (__NetBSD__) |
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652 # define LDAV_DONE |
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653 # undef LOAD_AVE_TYPE |
| 584 | 654 |
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655 # ifndef NETBSD_LDAV_FILE |
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656 # define NETBSD_LDAV_FILE "/kern/loadavg" |
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657 # endif |
| 584 | 658 |
| 659 unsigned long int load_ave[3], scale; | |
| 660 int count; | |
| 661 FILE *fp; | |
| 662 | |
| 663 fp = fopen (NETBSD_LDAV_FILE, "r"); | |
| 664 if (fp == NULL) | |
| 665 return -1; | |
| 666 count = fscanf (fp, "%lu %lu %lu %lu\n", | |
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667 &load_ave[0], &load_ave[1], &load_ave[2], |
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668 &scale); |
| 584 | 669 (void) fclose (fp); |
| 670 if (count != 4) | |
| 671 return -1; | |
| 672 | |
| 673 for (elem = 0; elem < nelem; elem++) | |
| 674 loadavg[elem] = (double) load_ave[elem] / (double) scale; | |
| 675 | |
| 676 return elem; | |
| 677 | |
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678 # endif /* __NetBSD__ */ |
| 584 | 679 |
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680 # if !defined (LDAV_DONE) && defined (NeXT) |
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681 # define LDAV_DONE |
| 584 | 682 /* The NeXT code was adapted from iscreen 3.2. */ |
| 683 | |
| 684 host_t host; | |
| 685 struct processor_set_basic_info info; | |
| 5159 | 686 unsigned int info_count; |
| 584 | 687 |
| 688 /* We only know how to get the 1-minute average for this system, | |
| 689 so even if the caller asks for more than 1, we only return 1. */ | |
| 690 | |
| 691 if (!getloadavg_initialized) | |
| 692 { | |
| 693 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) | |
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694 getloadavg_initialized = true; |
| 584 | 695 } |
| 696 | |
| 697 if (getloadavg_initialized) | |
| 698 { | |
| 699 info_count = PROCESSOR_SET_BASIC_INFO_COUNT; | |
| 700 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, | |
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701 (processor_set_info_t) &info, &info_count) |
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702 != KERN_SUCCESS) |
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703 getloadavg_initialized = false; |
| 584 | 704 else |
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705 { |
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706 if (nelem > 0) |
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707 loadavg[elem++] = (double) info.load_average / LOAD_SCALE; |
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708 } |
| 584 | 709 } |
| 710 | |
| 711 if (!getloadavg_initialized) | |
| 712 return -1; | |
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713 # endif /* NeXT */ |
| 584 | 714 |
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715 # if !defined (LDAV_DONE) && defined (UMAX) |
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716 # define LDAV_DONE |
| 584 | 717 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not |
| 718 have a /dev/kmem. Information about the workings of the running kernel | |
| 719 can be gathered with inq_stats system calls. | |
| 720 We only know how to get the 1-minute average for this system. */ | |
| 721 | |
| 722 struct proc_summary proc_sum_data; | |
| 723 struct stat_descr proc_info; | |
| 724 double load; | |
| 725 register unsigned int i, j; | |
| 726 | |
| 727 if (cpus == 0) | |
| 728 { | |
| 729 register unsigned int c, i; | |
| 730 struct cpu_config conf; | |
| 731 struct stat_descr desc; | |
| 732 | |
| 733 desc.sd_next = 0; | |
| 734 desc.sd_subsys = SUBSYS_CPU; | |
| 735 desc.sd_type = CPUTYPE_CONFIG; | |
| 736 desc.sd_addr = (char *) &conf; | |
| 737 desc.sd_size = sizeof conf; | |
| 738 | |
| 739 if (inq_stats (1, &desc)) | |
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740 return -1; |
| 584 | 741 |
| 742 c = 0; | |
| 743 for (i = 0; i < conf.config_maxclass; ++i) | |
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744 { |
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745 struct class_stats stats; |
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746 memset (&stats, 0, sizeof stats); |
| 584 | 747 |
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748 desc.sd_type = CPUTYPE_CLASS; |
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749 desc.sd_objid = i; |
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750 desc.sd_addr = (char *) &stats; |
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751 desc.sd_size = sizeof stats; |
| 584 | 752 |
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753 if (inq_stats (1, &desc)) |
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754 return -1; |
| 584 | 755 |
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756 c += stats.class_numcpus; |
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757 } |
| 584 | 758 cpus = c; |
| 759 samples = cpus < 2 ? 3 : (2 * cpus / 3); | |
| 760 } | |
| 761 | |
| 762 proc_info.sd_next = 0; | |
| 763 proc_info.sd_subsys = SUBSYS_PROC; | |
| 764 proc_info.sd_type = PROCTYPE_SUMMARY; | |
| 765 proc_info.sd_addr = (char *) &proc_sum_data; | |
| 766 proc_info.sd_size = sizeof (struct proc_summary); | |
| 767 proc_info.sd_sizeused = 0; | |
| 768 | |
| 769 if (inq_stats (1, &proc_info) != 0) | |
| 770 return -1; | |
| 771 | |
| 772 load = proc_sum_data.ps_nrunnable; | |
| 773 j = 0; | |
| 774 for (i = samples - 1; i > 0; --i) | |
| 775 { | |
| 776 load += proc_sum_data.ps_nrun[j]; | |
| 777 if (j++ == PS_NRUNSIZE) | |
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778 j = 0; |
| 584 | 779 } |
| 780 | |
| 781 if (nelem > 0) | |
| 782 loadavg[elem++] = load / samples / cpus; | |
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783 # endif /* UMAX */ |
| 584 | 784 |
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785 # if !defined (LDAV_DONE) && defined (DGUX) |
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786 # define LDAV_DONE |
| 584 | 787 /* This call can return -1 for an error, but with good args |
| 788 it's not supposed to fail. The first argument is for no | |
| 789 apparent reason of type `long int *'. */ | |
| 790 dg_sys_info ((long int *) &load_info, | |
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791 DG_SYS_INFO_LOAD_INFO_TYPE, |
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792 DG_SYS_INFO_LOAD_VERSION_0); |
| 584 | 793 |
| 794 if (nelem > 0) | |
| 795 loadavg[elem++] = load_info.one_minute; | |
| 796 if (nelem > 1) | |
| 797 loadavg[elem++] = load_info.five_minute; | |
| 798 if (nelem > 2) | |
| 799 loadavg[elem++] = load_info.fifteen_minute; | |
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800 # endif /* DGUX */ |
| 584 | 801 |
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802 # if !defined (LDAV_DONE) && defined (apollo) |
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803 # define LDAV_DONE |
| 584 | 804 /* Apollo code from lisch@mentorg.com (Ray Lischner). |
| 805 | |
| 806 This system call is not documented. The load average is obtained as | |
| 807 three long integers, for the load average over the past minute, | |
| 808 five minutes, and fifteen minutes. Each value is a scaled integer, | |
| 809 with 16 bits of integer part and 16 bits of fraction part. | |
| 810 | |
| 811 I'm not sure which operating system first supported this system call, | |
| 812 but I know that SR10.2 supports it. */ | |
| 813 | |
| 814 extern void proc1_$get_loadav (); | |
| 815 unsigned long load_ave[3]; | |
| 816 | |
| 817 proc1_$get_loadav (load_ave); | |
| 818 | |
| 819 if (nelem > 0) | |
| 820 loadavg[elem++] = load_ave[0] / 65536.0; | |
| 821 if (nelem > 1) | |
| 822 loadavg[elem++] = load_ave[1] / 65536.0; | |
| 823 if (nelem > 2) | |
| 824 loadavg[elem++] = load_ave[2] / 65536.0; | |
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825 # endif /* apollo */ |
| 584 | 826 |
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827 # if !defined (LDAV_DONE) && defined (OSF_MIPS) |
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828 # define LDAV_DONE |
| 584 | 829 |
| 830 struct tbl_loadavg load_ave; | |
| 831 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
| 832 loadavg[elem++] | |
| 833 = (load_ave.tl_lscale == 0 | |
| 834 ? load_ave.tl_avenrun.d[0] | |
| 835 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); | |
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836 # endif /* OSF_MIPS */ |
| 584 | 837 |
| 986 | 838 # if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) |
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839 # define LDAV_DONE |
| 584 | 840 |
| 841 /* A faithful emulation is going to have to be saved for a rainy day. */ | |
| 694 | 842 for ( ; elem < nelem; elem++) |
| 584 | 843 { |
| 844 loadavg[elem] = 0.0; | |
| 845 } | |
| 986 | 846 # endif /* __MSDOS__ || WINDOWS32 */ |
| 584 | 847 |
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848 # if !defined (LDAV_DONE) && defined (OSF_ALPHA) |
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849 # define LDAV_DONE |
| 584 | 850 |
| 851 struct tbl_loadavg load_ave; | |
| 852 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); | |
| 853 for (elem = 0; elem < nelem; elem++) | |
| 854 loadavg[elem] | |
| 855 = (load_ave.tl_lscale == 0 | |
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856 ? load_ave.tl_avenrun.d[elem] |
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857 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); |
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858 # endif /* OSF_ALPHA */ |
| 584 | 859 |
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860 # if ! defined LDAV_DONE && defined __VMS |
| 584 | 861 /* VMS specific code -- read from the Load Ave driver. */ |
| 862 | |
| 863 LOAD_AVE_TYPE load_ave[3]; | |
| 5159 | 864 static bool getloadavg_initialized; |
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865 # ifdef eunice |
| 584 | 866 struct |
| 867 { | |
| 868 int dsc$w_length; | |
| 869 char *dsc$a_pointer; | |
| 870 } descriptor; | |
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871 # endif |
| 584 | 872 |
| 873 /* Ensure that there is a channel open to the load ave device. */ | |
| 874 if (!getloadavg_initialized) | |
| 875 { | |
| 876 /* Attempt to open the channel. */ | |
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877 # ifdef eunice |
| 584 | 878 descriptor.dsc$w_length = 18; |
| 879 descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; | |
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880 # else |
| 584 | 881 $DESCRIPTOR (descriptor, "LAV0:"); |
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882 # endif |
| 584 | 883 if (sys$assign (&descriptor, &channel, 0, 0) & 1) |
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884 getloadavg_initialized = true; |
| 584 | 885 } |
| 886 | |
| 887 /* Read the load average vector. */ | |
| 888 if (getloadavg_initialized | |
| 889 && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0, | |
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890 load_ave, 12, 0, 0, 0, 0) & 1)) |
| 584 | 891 { |
| 892 sys$dassgn (channel); | |
| 5159 | 893 getloadavg_initialized = false; |
| 584 | 894 } |
| 895 | |
| 896 if (!getloadavg_initialized) | |
| 897 return -1; | |
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898 # endif /* ! defined LDAV_DONE && defined __VMS */ |
| 584 | 899 |
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900 # if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS |
| 584 | 901 |
| 902 /* UNIX-specific code -- read the average from /dev/kmem. */ | |
| 903 | |
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904 # define LDAV_PRIVILEGED /* This code requires special installation. */ |
| 584 | 905 |
| 906 LOAD_AVE_TYPE load_ave[3]; | |
| 907 | |
| 908 /* Get the address of LDAV_SYMBOL. */ | |
| 909 if (offset == 0) | |
| 910 { | |
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911 # ifndef sgi |
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getloadavg: check whether n_name is a pointer, for QNX 6.4.1
Matt Kraai <mkraai@beckman.com>
parents:
11071
diff
changeset
|
912 # if ! defined NLIST_STRUCT || ! defined N_NAME_POINTER |
|
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df2f4af88efc
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
913 strcpy (name_list[0].n_name, LDAV_SYMBOL); |
|
df2f4af88efc
getloadavg: merge minor changes from Emacs
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parents:
14079
diff
changeset
|
914 strcpy (name_list[1].n_name, ""); |
| 2609 | 915 # else /* NLIST_STRUCT */ |
|
4497
2d3dfc53822a
Sync with Emacs. From Dave Love.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
916 # ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME |
|
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
917 name_list[0].n_un.n_name = LDAV_SYMBOL; |
|
df2f4af88efc
getloadavg: merge minor changes from Emacs
Paul Eggert <eggert@cs.ucla.edu>
parents:
14079
diff
changeset
|
918 name_list[1].n_un.n_name = 0; |
|
4497
2d3dfc53822a
Sync with Emacs. From Dave Love.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
919 # else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
|
14275
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
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|
920 name_list[0].n_name = LDAV_SYMBOL; |
|
df2f4af88efc
getloadavg: merge minor changes from Emacs
Paul Eggert <eggert@cs.ucla.edu>
parents:
14079
diff
changeset
|
921 name_list[1].n_name = 0; |
|
4497
2d3dfc53822a
Sync with Emacs. From Dave Love.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
922 # endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ |
| 2609 | 923 # endif /* NLIST_STRUCT */ |
| 584 | 924 |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
925 # ifndef SUNOS_5 |
| 584 | 926 if ( |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
927 # if !(defined (_AIX) && !defined (ps2)) |
|
14275
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
928 nlist (KERNEL_FILE, name_list) |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
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|
929 # else /* _AIX */ |
|
14275
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getloadavg: merge minor changes from Emacs
Paul Eggert <eggert@cs.ucla.edu>
parents:
14079
diff
changeset
|
930 knlist (name_list, 1, sizeof (name_list[0])) |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
931 # endif |
|
12421
e8d2c6fc33ad
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Bruno Haible <bruno@clisp.org>
parents:
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diff
changeset
|
932 >= 0) |
|
14275
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getloadavg: merge minor changes from Emacs
Paul Eggert <eggert@cs.ucla.edu>
parents:
14079
diff
changeset
|
933 /* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */ |
|
12421
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Bruno Haible <bruno@clisp.org>
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diff
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|
934 { |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
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|
935 # ifdef FIXUP_KERNEL_SYMBOL_ADDR |
|
14275
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Paul Eggert <eggert@cs.ucla.edu>
parents:
14079
diff
changeset
|
936 FIXUP_KERNEL_SYMBOL_ADDR (name_list); |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
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diff
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|
937 # endif |
|
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|
938 offset = name_list[0].n_value; |
|
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|
939 } |
|
847
5edad29fd9ac
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Jim Meyering <jim@meyering.net>
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diff
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|
940 # endif /* !SUNOS_5 */ |
|
5edad29fd9ac
Indent cpp-directives to reflect nesting.
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diff
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|
941 # else /* sgi */ |
|
848
a663b54fd42b
Fix up indentation a little.
Jim Meyering <jim@meyering.net>
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diff
changeset
|
942 int ldav_off; |
| 584 | 943 |
|
848
a663b54fd42b
Fix up indentation a little.
Jim Meyering <jim@meyering.net>
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diff
changeset
|
944 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); |
|
a663b54fd42b
Fix up indentation a little.
Jim Meyering <jim@meyering.net>
parents:
847
diff
changeset
|
945 if (ldav_off != -1) |
|
12421
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Bruno Haible <bruno@clisp.org>
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diff
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|
946 offset = (long int) ldav_off & 0x7fffffff; |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
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diff
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|
947 # endif /* sgi */ |
|
848
a663b54fd42b
Fix up indentation a little.
Jim Meyering <jim@meyering.net>
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diff
changeset
|
948 } |
| 584 | 949 |
| 950 /* Make sure we have /dev/kmem open. */ | |
| 951 if (!getloadavg_initialized) | |
| 952 { | |
|
847
5edad29fd9ac
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Jim Meyering <jim@meyering.net>
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diff
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|
953 # ifndef SUNOS_5 |
|
14313
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
954 /* Set the channel to close on exec, so it does not |
|
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
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parents:
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diff
changeset
|
955 litter any child's descriptor table. */ |
|
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
956 # ifndef O_CLOEXEC |
|
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
Paul Eggert <eggert@cs.ucla.edu>
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diff
changeset
|
957 # define O_CLOEXEC 0 |
|
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
Paul Eggert <eggert@cs.ucla.edu>
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diff
changeset
|
958 # endif |
|
dd51e283d6cd
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diff
changeset
|
959 int fd = open ("/dev/kmem", O_RDONLY | O_CLOEXEC); |
|
dd51e283d6cd
getloadavg: don't depend on c-strtod, cloexec, fcntl-safer
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|
960 if (0 <= fd) |
|
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|
961 { |
|
14313
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|
962 # if F_DUPFD_CLOEXEC |
|
dd51e283d6cd
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changeset
|
963 if (fd <= STDERR_FILENO) |
|
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|
964 { |
|
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
|
965 int fd1 = fcntl (fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1); |
|
dd51e283d6cd
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parents:
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diff
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|
966 close (fd); |
|
dd51e283d6cd
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diff
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|
967 fd = fd1; |
|
dd51e283d6cd
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|
968 } |
|
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|
969 # endif |
|
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|
970 if (0 <= fd) |
|
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parents:
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|
971 { |
|
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Paul Eggert <eggert@cs.ucla.edu>
parents:
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changeset
|
972 channel = fd; |
|
dd51e283d6cd
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|
973 getloadavg_initialized = true; |
|
dd51e283d6cd
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|
974 } |
|
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|
975 } |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
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|
976 # else /* SUNOS_5 */ |
| 584 | 977 /* We pass 0 for the kernel, corefile, and swapfile names |
|
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|
978 to use the currently running kernel. */ |
| 584 | 979 kd = kvm_open (0, 0, 0, O_RDONLY, 0); |
| 694 | 980 if (kd != 0) |
|
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|
981 { |
|
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|
982 /* nlist the currently running kernel. */ |
|
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|
983 kvm_nlist (kd, name_list); |
|
df2f4af88efc
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changeset
|
984 offset = name_list[0].n_value; |
|
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changeset
|
985 getloadavg_initialized = true; |
|
e8d2c6fc33ad
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|
986 } |
|
847
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Indent cpp-directives to reflect nesting.
Jim Meyering <jim@meyering.net>
parents:
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diff
changeset
|
987 # endif /* SUNOS_5 */ |
| 584 | 988 } |
| 989 | |
| 990 /* If we can, get the load average values. */ | |
| 991 if (offset && getloadavg_initialized) | |
| 992 { | |
| 993 /* Try to read the load. */ | |
|
847
5edad29fd9ac
Indent cpp-directives to reflect nesting.
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parents:
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diff
changeset
|
994 # ifndef SUNOS_5 |
| 584 | 995 if (lseek (channel, offset, 0) == -1L |
|
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|
996 || read (channel, (char *) load_ave, sizeof (load_ave)) |
|
e8d2c6fc33ad
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changeset
|
997 != sizeof (load_ave)) |
|
e8d2c6fc33ad
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|
998 { |
|
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|
999 close (channel); |
|
e8d2c6fc33ad
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|
1000 getloadavg_initialized = false; |
|
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|
1001 } |
|
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Indent cpp-directives to reflect nesting.
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diff
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|
1002 # else /* SUNOS_5 */ |
| 584 | 1003 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) |
|
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|
1004 != sizeof (load_ave)) |
|
e8d2c6fc33ad
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|
1005 { |
|
e8d2c6fc33ad
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|
1006 kvm_close (kd); |
|
e8d2c6fc33ad
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|
1007 getloadavg_initialized = false; |
|
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|
1008 } |
|
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parents:
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diff
changeset
|
1009 # endif /* SUNOS_5 */ |
| 584 | 1010 } |
| 1011 | |
| 1012 if (offset == 0 || !getloadavg_initialized) | |
| 1013 return -1; | |
|
6934
d68ff786c180
* lib/getloadavg.c: Use __VMS, not VMS.
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parents:
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diff
changeset
|
1014 # endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */ |
| 584 | 1015 |
|
847
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Indent cpp-directives to reflect nesting.
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diff
changeset
|
1016 # if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ |
| 584 | 1017 if (nelem > 0) |
| 1018 loadavg[elem++] = LDAV_CVT (load_ave[0]); | |
| 1019 if (nelem > 1) | |
| 1020 loadavg[elem++] = LDAV_CVT (load_ave[1]); | |
| 1021 if (nelem > 2) | |
| 1022 loadavg[elem++] = LDAV_CVT (load_ave[2]); | |
| 1023 | |
|
847
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|
1024 # define LDAV_DONE |
|
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diff
changeset
|
1025 # endif /* !LDAV_DONE && LOAD_AVE_TYPE */ |
| 584 | 1026 |
|
6270
dadc9a17b3bb
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diff
changeset
|
1027 # if !defined LDAV_DONE |
| 584 | 1028 /* Set errno to zero to indicate that there was no particular error; |
| 1029 this function just can't work at all on this system. */ | |
| 1030 errno = 0; | |
|
6270
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* getloadavg.c: Include fcntl--.h rather than fcntl.h.
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changeset
|
1031 elem = -1; |
|
847
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|
1032 # endif |
|
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|
1033 return elem; |
| 584 | 1034 } |
| 1035 | |
| 1036 #endif /* ! HAVE_GETLOADAVG */ | |
| 1037 | |
| 1038 #ifdef TEST | |
| 5159 | 1039 int |
|
4649
c2721dfc9217
(getloadavg, main): Define via prototypes.
Paul Eggert <eggert@cs.ucla.edu>
parents:
4498
diff
changeset
|
1040 main (int argc, char **argv) |
| 584 | 1041 { |
| 1042 int naptime = 0; | |
| 1043 | |
| 1044 if (argc > 1) | |
| 1045 naptime = atoi (argv[1]); | |
| 1046 | |
| 1047 while (1) | |
| 1048 { | |
| 1049 double avg[3]; | |
| 1050 int loads; | |
| 1051 | |
|
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|
1052 errno = 0; /* Don't be misled if it doesn't set errno. */ |
| 584 | 1053 loads = getloadavg (avg, 3); |
| 1054 if (loads == -1) | |
|
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1055 { |
|
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|
1056 perror ("Error getting load average"); |
|
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1057 return EXIT_FAILURE; |
|
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|
1058 } |
| 584 | 1059 if (loads > 0) |
|
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|
1060 printf ("1-minute: %f ", avg[0]); |
| 584 | 1061 if (loads > 1) |
|
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|
1062 printf ("5-minute: %f ", avg[1]); |
| 584 | 1063 if (loads > 2) |
|
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changeset
|
1064 printf ("15-minute: %f ", avg[2]); |
| 584 | 1065 if (loads > 0) |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
11748
diff
changeset
|
1066 putchar ('\n'); |
| 584 | 1067 |
| 1068 if (naptime == 0) | |
|
12421
e8d2c6fc33ad
Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
11748
diff
changeset
|
1069 break; |
| 584 | 1070 sleep (naptime); |
| 1071 } | |
| 1072 | |
| 5159 | 1073 return EXIT_SUCCESS; |
| 584 | 1074 } |
| 1075 #endif /* TEST */ |