X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetloadavg.c;h=5a4005cee0b9e5d6af9ef8165582a1f440598956;hb=26bcf332910819619fc48ee9f248822dd0babfd6;hp=bd024cf20d0e43f15ca6f9d9293ff825f55420f4;hpb=31395e89ca1926008b7603ee1c22594d6bba7d92;p=gnulib.git diff --git a/lib/getloadavg.c b/lib/getloadavg.c index bd024cf20..5a4005cee 100644 --- a/lib/getloadavg.c +++ b/lib/getloadavg.c @@ -1,11 +1,16 @@ /* Get the system load averages. - Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995 - Free Software Foundation, Inc. - This program is free software; you can redistribute it and/or modify + Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, + 1995, 1997, 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free + Software Foundation, Inc. + + NOTE: The canonical source of this file is maintained with gnulib. + Bugs can be reported to bug-gnulib@gnu.org. + + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -13,26 +18,38 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - USA. */ + along with this program. If not, see . */ /* Compile-time symbols that this file uses: + HAVE_PSTAT_GETDYNAMIC Define this if your system has the + pstat_getdynamic function. I think it + is unique to HPUX9. The best way to get the + definition is through the AC_FUNC_GETLOADAVG + macro that comes with autoconf 2.13 or newer. + If that isn't an option, then just put + AC_CHECK_FUNCS(pstat_getdynamic) in your + configure.in file. + HAVE_LIBPERFSTAT Define this if your system has the + perfstat_cpu_total function in libperfstat (AIX). FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist. - KERNEL_FILE Pathname of the kernel to nlist. + KERNEL_FILE Name of the kernel file to nlist. LDAV_CVT() Scale the load average from the kernel. Returns a double. LDAV_SYMBOL Name of kernel symbol giving load average. LOAD_AVE_TYPE Type of the load average array in the kernel. Must be defined unless one of apollo, DGUX, NeXT, or UMAX is defined; + or we have libkstat; otherwise, no load average is available. + HAVE_NLIST_H nlist.h is available. NLIST_STRUCT defaults + to this. NLIST_STRUCT Include nlist.h, not a.out.h, and the nlist n_name element is a pointer, not an array. - NLIST_NAME_UNION struct nlist has an n_un member, not n_name. - LINUX_LDAV_FILE [__linux__]: File containing load averages. + HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'. + LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing + load averages. Specific system predefines this file uses, aside from setting default values if not emacs: @@ -43,6 +60,7 @@ DGUX eunice UNIX emulator under VMS. hpux + __MSDOS__ No-op for MSDOS. NeXT sgi sequent Sequent Dynix 3.x.x (BSD) @@ -51,9 +69,11 @@ UMAX UMAX4_3 VMS - __linux__ Linux: assumes /proc filesystem mounted. - Support from Michael K. Johnson. - __NetBSD__ NetBSD: assumes /kern filesystem mounted. + WINDOWS32 No-op for Windows95/NT. + __linux__ Linux: assumes /proc file system mounted. + Support from Michael K. Johnson. + __CYGWIN__ Cygwin emulates linux /proc/loadavg. + __NetBSD__ NetBSD: assumes /kern file system mounted. In addition, to avoid nesting many #ifdefs, we internally set LDAV_DONE to indicate that the load average has been computed. @@ -61,35 +81,38 @@ We also #define LDAV_PRIVILEGED if a program will require special installation to be able to call getloadavg. */ -/* This should always be first. */ -#ifdef HAVE_CONFIG_H -#include -#endif - -#include +/* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems + with partially-configured source directories. */ -/* Both the Emacs and non-Emacs sections want this. Some - configuration files' definitions for the LOAD_AVE_CVT macro (like - sparc.h's) use macros like FSCALE, defined here. */ -#ifdef unix -#include +#ifndef CONFIGURING_GETLOADAVG +# include +# include #endif - -/* Exclude all the code except the test program at the end - if the system has its own `getloadavg' function. - - The declaration of `errno' is needed by the test program - as well as the function itself, so it comes first. */ +/* Specification. */ +#include #include +#include -#ifndef errno -extern int errno; -#endif +/* Exclude all the code except the test program at the end + if the system has its own `getloadavg' function. */ #ifndef HAVE_GETLOADAVG +# include + +/* Both the Emacs and non-Emacs sections want this. Some + configuration files' definitions for the LOAD_AVE_CVT macro (like + sparc.h's) use macros like FSCALE, defined here. */ +# if defined (unix) || defined (__unix) +# include +# endif + +# include "c-strtod.h" +# include "cloexec.h" +# include "intprops.h" +# include "xalloc.h" /* The existing Emacs configuration files define a macro called LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and @@ -101,25 +124,31 @@ extern int errno; LOAD_AVE_CVT, but future machine config files should just define LDAV_CVT directly. */ -#if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) -#define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) -#endif +# if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT) +# define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) +# endif -#if !defined (BSD) && defined (ultrix) +# if !defined (BSD) && defined (ultrix) /* Ultrix behaves like BSD on Vaxen. */ -#define BSD -#endif +# define BSD +# endif -#ifdef NeXT +# ifdef NeXT /* NeXT in the 2.{0,1,2} releases defines BSD in , which conflicts with the definition understood in this file, that this really is BSD. */ -#undef BSD +# undef BSD /* NeXT defines FSCALE in . However, we take FSCALE being defined to mean that the nlist method should be used, which is not true. */ -#undef FSCALE -#endif +# undef FSCALE +# endif + +/* Same issues as for NeXT apply to the HURD-based GNU system. */ +# ifdef __GNU__ +# undef BSD +# undef FSCALE +# endif /* __GNU__ */ /* Set values that are different from the defaults, which are set a little farther down with #ifndef. */ @@ -127,372 +156,348 @@ extern int errno; /* Some shorthands. */ -#if defined (HPUX) && !defined (hpux) -#define hpux -#endif - -#if defined(hp300) && !defined(hpux) -#define MORE_BSD -#endif - -#if defined(ultrix) && defined(mips) -#define decstation -#endif - -#if (defined(sun) || defined(__sun)) && defined(SVR4) -#define SUNOS_5 -#endif - -#if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) -#define OSF_ALPHA -#include -#endif - -#if defined (__osf__) && (defined (mips) || defined (__mips__)) -#define OSF_MIPS -#include -#endif +# if defined (HPUX) && !defined (hpux) +# define hpux +# endif + +# if defined (__hpux) && !defined (hpux) +# define hpux +# endif + +# if defined (__sun) && !defined (sun) +# define sun +# endif + +# if defined (hp300) && !defined (hpux) +# define MORE_BSD +# endif + +# if defined (ultrix) && defined (mips) +# define decstation +# endif + +# if defined (__SVR4) && !defined (SVR4) +# define SVR4 +# endif + +# if (defined (sun) && defined (SVR4)) || defined (SOLARIS2) +# define SUNOS_5 +# endif + +# if defined (__osf__) && (defined (__alpha) || defined (__alpha__)) +# define OSF_ALPHA +# include +# include +# include +# include +/* Tru64 4.0D's table.h redefines sys */ +# undef sys +# endif + +# if defined (__osf__) && (defined (mips) || defined (__mips__)) +# define OSF_MIPS +# include +# endif /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by default, but _MACH_IND_SYS_TYPES is defined in . Combine that with a couple of other things and we'll have a unique match. */ -#if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) -#define tek4300 /* Define by emacs, but not by other users. */ -#endif +# if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES) +# define tek4300 /* Define by emacs, but not by other users. */ +# endif /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */ -#ifndef LOAD_AVE_TYPE +# ifndef LOAD_AVE_TYPE -#ifdef MORE_BSD -#define LOAD_AVE_TYPE long -#endif +# ifdef MORE_BSD +# define LOAD_AVE_TYPE long +# endif -#if defined(sun) || defined(__sun) -#define LOAD_AVE_TYPE long -#endif +# ifdef sun +# define LOAD_AVE_TYPE long +# endif -#ifdef decstation -#define LOAD_AVE_TYPE long -#endif +# ifdef decstation +# define LOAD_AVE_TYPE long +# endif -#ifdef _SEQUENT_ -#define LOAD_AVE_TYPE long -#endif +# ifdef _SEQUENT_ +# define LOAD_AVE_TYPE long +# endif -#ifdef sgi -#define LOAD_AVE_TYPE long -#endif +# ifdef sgi +# define LOAD_AVE_TYPE long +# endif -#ifdef SVR4 -#define LOAD_AVE_TYPE long -#endif +# ifdef SVR4 +# define LOAD_AVE_TYPE long +# endif -#ifdef sony_news -#define LOAD_AVE_TYPE long -#endif +# ifdef sony_news +# define LOAD_AVE_TYPE long +# endif -#ifdef sequent -#define LOAD_AVE_TYPE long -#endif +# ifdef sequent +# define LOAD_AVE_TYPE long +# endif -#ifdef OSF_ALPHA -#define LOAD_AVE_TYPE long -#endif +# ifdef OSF_ALPHA +# define LOAD_AVE_TYPE long +# endif -#if defined (ardent) && defined (titan) -#define LOAD_AVE_TYPE long -#endif +# if defined (ardent) && defined (titan) +# define LOAD_AVE_TYPE long +# endif -#ifdef tek4300 -#define LOAD_AVE_TYPE long -#endif +# ifdef tek4300 +# define LOAD_AVE_TYPE long +# endif -#if defined(alliant) && defined(i860) /* Alliant FX/2800 */ -#define LOAD_AVE_TYPE long -#endif +# if defined (alliant) && defined (i860) /* Alliant FX/2800 */ +# define LOAD_AVE_TYPE long +# endif -#ifdef _AIX -#define LOAD_AVE_TYPE long -#endif +# if defined _AIX && ! defined HAVE_LIBPERFSTAT +# define LOAD_AVE_TYPE long +# endif -#ifdef convex -#define LOAD_AVE_TYPE double -#ifndef LDAV_CVT -#define LDAV_CVT(n) (n) -#endif -#endif +# ifdef convex +# define LOAD_AVE_TYPE double +# ifndef LDAV_CVT +# define LDAV_CVT(n) (n) +# endif +# endif -#endif /* No LOAD_AVE_TYPE. */ +# endif /* No LOAD_AVE_TYPE. */ -#ifdef OSF_ALPHA +# ifdef OSF_ALPHA /* defines an incorrect value for FSCALE on Alpha OSF/1, according to ghazi@noc.rutgers.edu. */ -#undef FSCALE -#define FSCALE 1024.0 -#endif +# undef FSCALE +# define FSCALE 1024.0 +# endif -#if defined(alliant) && defined(i860) /* Alliant FX/2800 */ +# if defined (alliant) && defined (i860) /* Alliant FX/2800 */ /* defines an incorrect value for FSCALE on an Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */ -#undef FSCALE -#define FSCALE 100.0 -#endif +# undef FSCALE +# define FSCALE 100.0 +# endif -#ifndef FSCALE +# ifndef FSCALE /* SunOS and some others define FSCALE in sys/param.h. */ -#ifdef MORE_BSD -#define FSCALE 2048.0 -#endif +# ifdef MORE_BSD +# define FSCALE 2048.0 +# endif -#if defined(MIPS) || defined(SVR4) || defined(decstation) -#define FSCALE 256 -#endif +# if defined (MIPS) || defined (SVR4) || defined (decstation) +# define FSCALE 256 +# endif -#if defined (sgi) || defined (sequent) +# if defined (sgi) || defined (sequent) /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined above under #ifdef MIPS. But we want the sgi value. */ -#undef FSCALE -#define FSCALE 1000.0 -#endif - -#if defined (ardent) && defined (titan) -#define FSCALE 65536.0 -#endif - -#ifdef tek4300 -#define FSCALE 100.0 -#endif - -#ifdef _AIX -#define FSCALE 65536.0 -#endif - -#endif /* Not FSCALE. */ - -#if !defined (LDAV_CVT) && defined (FSCALE) -#define LDAV_CVT(n) (((double) (n)) / FSCALE) -#endif - -/* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */ -#ifndef NLIST_STRUCT - -#ifdef MORE_BSD -#define NLIST_STRUCT -#endif - -#if defined(sun) || defined(__sun) -#define NLIST_STRUCT -#endif - -#ifdef decstation -#define NLIST_STRUCT -#endif - -#ifdef hpux -#define NLIST_STRUCT -#endif - -#if defined (_SEQUENT_) || defined (sequent) -#define NLIST_STRUCT -#endif - -#ifdef sgi -#define NLIST_STRUCT -#endif - -#ifdef SVR4 -#define NLIST_STRUCT -#endif - -#ifdef sony_news -#define NLIST_STRUCT -#endif - -#ifdef OSF_ALPHA -#define NLIST_STRUCT -#endif +# undef FSCALE +# define FSCALE 1000.0 +# endif -#if defined (ardent) && defined (titan) -#define NLIST_STRUCT -#endif +# if defined (ardent) && defined (titan) +# define FSCALE 65536.0 +# endif -#ifdef tek4300 -#define NLIST_STRUCT -#endif +# ifdef tek4300 +# define FSCALE 100.0 +# endif -#ifdef butterfly -#define NLIST_STRUCT -#endif +# if defined _AIX && !defined HAVE_LIBPERFSTAT +# define FSCALE 65536.0 +# endif -#if defined(alliant) && defined(i860) /* Alliant FX/2800 */ -#define NLIST_STRUCT -#endif +# endif /* Not FSCALE. */ -#ifdef _AIX -#define NLIST_STRUCT -#endif +# if !defined (LDAV_CVT) && defined (FSCALE) +# define LDAV_CVT(n) (((double) (n)) / FSCALE) +# endif -#endif /* defined (NLIST_STRUCT) */ +# ifndef NLIST_STRUCT +# if HAVE_NLIST_H +# define NLIST_STRUCT +# endif +# endif +# if defined (sgi) || (defined (mips) && !defined (BSD)) +# define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) +# endif -#if defined(sgi) || (defined(mips) && !defined(BSD)) -#define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) -#endif +# if !defined (KERNEL_FILE) && defined (sequent) +# define KERNEL_FILE "/dynix" +# endif -#if !defined (KERNEL_FILE) && defined (sequent) -#define KERNEL_FILE "/dynix" -#endif +# if !defined (KERNEL_FILE) && defined (hpux) +# define KERNEL_FILE "/hp-ux" +# endif -#if !defined (KERNEL_FILE) && defined (hpux) -#define KERNEL_FILE "/hp-ux" -#endif +# if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) +# define KERNEL_FILE "/unix" +# endif -#if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan))) -#define KERNEL_FILE "/unix" -#endif +# if !defined (LDAV_SYMBOL) && defined (alliant) +# define LDAV_SYMBOL "_Loadavg" +# endif -#if !defined (LDAV_SYMBOL) && defined (alliant) -#define LDAV_SYMBOL "_Loadavg" -#endif +# 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))) +# define LDAV_SYMBOL "avenrun" +# endif -#if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX)) -#define LDAV_SYMBOL "avenrun" -#endif - -#ifdef HAVE_UNISTD_H -#include -#endif - -#include +# include /* LOAD_AVE_TYPE should only get defined if we're going to use the nlist method. */ -#if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL)) -#define LOAD_AVE_TYPE double -#endif - -#ifdef LOAD_AVE_TYPE - -#ifndef VMS -#ifndef NLIST_STRUCT -#include -#else /* NLIST_STRUCT */ -#include -#endif /* NLIST_STRUCT */ - -#ifdef SUNOS_5 -#include -#include -#endif - -#ifndef KERNEL_FILE -#define KERNEL_FILE "/vmunix" -#endif /* KERNEL_FILE */ - -#ifndef LDAV_SYMBOL -#define LDAV_SYMBOL "_avenrun" -#endif /* LDAV_SYMBOL */ - -#else /* VMS */ - -#ifndef eunice -#include -#include -#else /* eunice */ -#include -#endif /* eunice */ -#endif /* VMS */ - -#ifndef LDAV_CVT -#define LDAV_CVT(n) ((double) (n)) -#endif /* !LDAV_CVT */ - -#endif /* LOAD_AVE_TYPE */ - -#ifdef NeXT -#ifdef HAVE_MACH_MACH_H -#include -#else -#include -#endif -#endif /* NeXT */ - -#ifdef sgi -#include -#endif /* sgi */ - -#ifdef UMAX -#include -#include -#include -#include -#include - -#ifdef UMAX_43 -#include -#include -#include -#include -#include -#else /* Not UMAX_43. */ -#include -#include -#include -#include -#include -#include -#endif /* Not UMAX_43. */ -#endif /* UMAX */ - -#ifdef DGUX -#include -#endif - -#if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) -#include -#else -#include -#endif +# if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) +# define LOAD_AVE_TYPE double +# endif + +# ifdef LOAD_AVE_TYPE + +# ifndef __VMS +# ifndef __linux__ +# ifndef NLIST_STRUCT +# include +# else /* NLIST_STRUCT */ +# include +# endif /* NLIST_STRUCT */ + +# ifdef SUNOS_5 +# include +# include +# include +# endif + +# if defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) +# include +# endif + +# ifndef KERNEL_FILE +# define KERNEL_FILE "/vmunix" +# endif /* KERNEL_FILE */ + +# ifndef LDAV_SYMBOL +# define LDAV_SYMBOL "_avenrun" +# endif /* LDAV_SYMBOL */ +# endif /* __linux__ */ + +# else /* __VMS */ + +# ifndef eunice +# include +# include +# else /* eunice */ +# include +# endif /* eunice */ +# endif /* __VMS */ + +# ifndef LDAV_CVT +# define LDAV_CVT(n) ((double) (n)) +# endif /* !LDAV_CVT */ + +# endif /* LOAD_AVE_TYPE */ + +# if defined HAVE_LIBPERFSTAT +# include +# include +# include +# ifndef SBITS +# define SBITS 16 +# endif +# endif + +# if defined (__GNU__) && !defined (NeXT) +/* Note that NeXT Openstep defines __GNU__ even though it should not. */ +/* GNU system acts much like NeXT, for load average purposes, + but not exactly. */ +# define NeXT +# define host_self mach_host_self +# endif + +# ifdef NeXT +# ifdef HAVE_MACH_MACH_H +# include +# else +# include +# endif +# endif /* NeXT */ + +# ifdef sgi +# include +# endif /* sgi */ + +# ifdef UMAX +# include +# include +# include +# include + +# ifdef UMAX_43 +# include +# include +# include +# include +# include +# else /* Not UMAX_43. */ +# include +# include +# include +# include +# include +# include +# endif /* Not UMAX_43. */ +# endif /* UMAX */ + +# ifdef DGUX +# include +# endif + +# include "fcntl--.h" /* Avoid static vars inside a function since in HPUX they dump as pure. */ -#ifdef NeXT +# ifdef NeXT static processor_set_t default_set; -static int getloadavg_initialized; -#endif /* NeXT */ +static bool getloadavg_initialized; +# endif /* NeXT */ -#ifdef UMAX +# ifdef UMAX static unsigned int cpus = 0; static unsigned int samples; -#endif /* UMAX */ +# endif /* UMAX */ -#ifdef DGUX +# ifdef DGUX static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ -#endif /* DGUX */ +# endif /* DGUX */ -#ifdef LOAD_AVE_TYPE +# if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE) /* File descriptor open to /dev/kmem or VMS load ave driver. */ static int channel; -/* Nonzero iff channel is valid. */ -static int getloadavg_initialized; +/* True iff channel is valid. */ +static bool getloadavg_initialized; /* Offset in kmem to seek to read load average, or 0 means invalid. */ static long offset; -#if !defined(VMS) && !defined(sgi) +# if ! defined __VMS && ! defined sgi && ! defined __linux__ static struct nlist nl[2]; -#endif /* Not VMS or sgi */ +# endif -#ifdef SUNOS_5 +# ifdef SUNOS_5 static kvm_t *kd; -#endif /* SUNOS_5 */ +# endif /* SUNOS_5 */ -#endif /* LOAD_AVE_TYPE */ +# endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */ /* Put the 1 minute, 5 minute and 15 minute load averages into the first NELEM elements of LOADAVG. @@ -500,59 +505,147 @@ static kvm_t *kd; or -1 if an error occurred. */ int -getloadavg (loadavg, nelem) - double loadavg[]; - int nelem; +getloadavg (double loadavg[], int nelem) { int elem = 0; /* Return value. */ -#ifdef NO_GET_LOAD_AVG -#define LDAV_DONE +# ifdef NO_GET_LOAD_AVG +# define LDAV_DONE /* Set errno to zero to indicate that there was no particular error; this function just can't work at all on this system. */ errno = 0; elem = -1; -#endif +# endif -#if !defined (LDAV_DONE) && defined (__linux__) -#define LDAV_DONE -#undef LOAD_AVE_TYPE +# if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) +/* Use libkstat because we don't have to be root. */ +# define LDAV_DONE + kstat_ctl_t *kc; + kstat_t *ksp; + kstat_named_t *kn; + + kc = kstat_open (); + if (kc == 0) + return -1; + ksp = kstat_lookup (kc, "unix", 0, "system_misc"); + if (ksp == 0) + return -1; + if (kstat_read (kc, ksp, 0) == -1) + return -1; -#ifndef LINUX_LDAV_FILE -#define LINUX_LDAV_FILE "/proc/loadavg" -#endif - char ldavgbuf[40]; - double load_ave[3]; + kn = kstat_data_lookup (ksp, "avenrun_1min"); + if (kn == 0) + { + /* Return -1 if no load average information is available. */ + nelem = 0; + elem = -1; + } + + if (nelem >= 1) + loadavg[elem++] = (double) kn->value.ul / FSCALE; + + if (nelem >= 2) + { + kn = kstat_data_lookup (ksp, "avenrun_5min"); + if (kn != 0) + { + loadavg[elem++] = (double) kn->value.ul / FSCALE; + + if (nelem >= 3) + { + kn = kstat_data_lookup (ksp, "avenrun_15min"); + if (kn != 0) + loadavg[elem++] = (double) kn->value.ul / FSCALE; + } + } + } + + kstat_close (kc); +# endif /* HAVE_LIBKSTAT */ + +# if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) +/* Use pstat_getdynamic() because we don't have to be root. */ +# define LDAV_DONE +# undef LOAD_AVE_TYPE + + struct pst_dynamic dyn_info; + if (pstat_getdynamic (&dyn_info, sizeof (dyn_info), 0, 0) < 0) + return -1; + if (nelem > 0) + loadavg[elem++] = dyn_info.psd_avg_1_min; + if (nelem > 1) + loadavg[elem++] = dyn_info.psd_avg_5_min; + if (nelem > 2) + loadavg[elem++] = dyn_info.psd_avg_15_min; + +# endif /* hpux && HAVE_PSTAT_GETDYNAMIC */ + +# if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT +# define LDAV_DONE +# undef LOAD_AVE_TYPE +/* Use perfstat_cpu_total because we don't have to be root. */ + { + perfstat_cpu_total_t cpu_stats; + int result = perfstat_cpu_total (NULL, &cpu_stats, sizeof cpu_stats, 1); + if (result == -1) + return result; + loadavg[0] = cpu_stats.loadavg[0] / (double)(1 << SBITS); + loadavg[1] = cpu_stats.loadavg[1] / (double)(1 << SBITS); + loadavg[2] = cpu_stats.loadavg[2] / (double)(1 << SBITS); + elem = 3; + } +# endif + +# if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__)) +# define LDAV_DONE +# undef LOAD_AVE_TYPE + +# ifndef LINUX_LDAV_FILE +# define LINUX_LDAV_FILE "/proc/loadavg" +# endif + + char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")]; + char const *ptr = ldavgbuf; int fd, count; fd = open (LINUX_LDAV_FILE, O_RDONLY); if (fd == -1) return -1; - count = read (fd, ldavgbuf, 40); + count = read (fd, ldavgbuf, sizeof ldavgbuf - 1); (void) close (fd); if (count <= 0) return -1; + ldavgbuf[count] = '\0'; - count = sscanf (ldavgbuf, "%lf %lf %lf", - &load_ave[0], &load_ave[1], &load_ave[2]); - if (count < 1) - return -1; + for (elem = 0; elem < nelem; elem++) + { + char *endptr; + double d; - for (elem = 0; elem < nelem && elem < count; elem++) - loadavg[elem] = load_ave[elem]; + errno = 0; + d = c_strtod (ptr, &endptr); + if (ptr == endptr || (d == 0 && errno != 0)) + { + if (elem == 0) + return -1; + break; + } + loadavg[elem] = d; + ptr = endptr; + } return elem; -#endif /* __linux__ */ +# endif /* __linux__ || __CYGWIN__ */ -#if !defined (LDAV_DONE) && defined (__NetBSD__) -#define LDAV_DONE -#undef LOAD_AVE_TYPE +# if !defined (LDAV_DONE) && defined (__NetBSD__) +# define LDAV_DONE +# undef LOAD_AVE_TYPE -#ifndef NETBSD_LDAV_FILE -#define NETBSD_LDAV_FILE "/kern/loadavg" -#endif +# ifndef NETBSD_LDAV_FILE +# define NETBSD_LDAV_FILE "/kern/loadavg" +# endif unsigned long int load_ave[3], scale; int count; @@ -573,15 +666,15 @@ getloadavg (loadavg, nelem) return elem; -#endif /* __NetBSD__ */ +# endif /* __NetBSD__ */ -#if !defined (LDAV_DONE) && defined (NeXT) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (NeXT) +# define LDAV_DONE /* The NeXT code was adapted from iscreen 3.2. */ host_t host; struct processor_set_basic_info info; - unsigned info_count; + unsigned int info_count; /* We only know how to get the 1-minute average for this system, so even if the caller asks for more than 1, we only return 1. */ @@ -589,16 +682,16 @@ getloadavg (loadavg, nelem) if (!getloadavg_initialized) { if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS) - getloadavg_initialized = 1; + getloadavg_initialized = true; } if (getloadavg_initialized) { info_count = PROCESSOR_SET_BASIC_INFO_COUNT; if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, - (processor_set_info_t) &info, &info_count) + (processor_set_info_t) &info, &info_count) != KERN_SUCCESS) - getloadavg_initialized = 0; + getloadavg_initialized = false; else { if (nelem > 0) @@ -608,10 +701,10 @@ getloadavg (loadavg, nelem) if (!getloadavg_initialized) return -1; -#endif /* NeXT */ +# endif /* NeXT */ -#if !defined (LDAV_DONE) && defined (UMAX) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (UMAX) +# define LDAV_DONE /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not have a /dev/kmem. Information about the workings of the running kernel can be gathered with inq_stats system calls. @@ -678,10 +771,10 @@ getloadavg (loadavg, nelem) if (nelem > 0) loadavg[elem++] = load / samples / cpus; -#endif /* UMAX */ +# endif /* UMAX */ -#if !defined (LDAV_DONE) && defined (DGUX) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (DGUX) +# define LDAV_DONE /* This call can return -1 for an error, but with good args it's not supposed to fail. The first argument is for no apparent reason of type `long int *'. */ @@ -695,10 +788,10 @@ getloadavg (loadavg, nelem) loadavg[elem++] = load_info.five_minute; if (nelem > 2) loadavg[elem++] = load_info.fifteen_minute; -#endif /* DGUX */ +# endif /* DGUX */ -#if !defined (LDAV_DONE) && defined (apollo) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (apollo) +# define LDAV_DONE /* Apollo code from lisch@mentorg.com (Ray Lischner). This system call is not documented. The load average is obtained as @@ -720,10 +813,10 @@ getloadavg (loadavg, nelem) loadavg[elem++] = load_ave[1] / 65536.0; if (nelem > 2) loadavg[elem++] = load_ave[2] / 65536.0; -#endif /* apollo */ +# endif /* apollo */ -#if !defined (LDAV_DONE) && defined (OSF_MIPS) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (OSF_MIPS) +# define LDAV_DONE struct tbl_loadavg load_ave; table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); @@ -731,55 +824,55 @@ getloadavg (loadavg, nelem) = (load_ave.tl_lscale == 0 ? load_ave.tl_avenrun.d[0] : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); -#endif /* OSF_MIPS */ +# endif /* OSF_MIPS */ -#if !defined (LDAV_DONE) && defined(MSDOS) -#define LDAV_DONE +# if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32)) +# define LDAV_DONE /* A faithful emulation is going to have to be saved for a rainy day. */ - for ( ; elem < nelem; elem++) + for ( ; elem < nelem; elem++) { loadavg[elem] = 0.0; } -#endif /* MSDOS */ +# endif /* __MSDOS__ || WINDOWS32 */ -#if !defined (LDAV_DONE) && defined (OSF_ALPHA) -#define LDAV_DONE +# if !defined (LDAV_DONE) && defined (OSF_ALPHA) +# define LDAV_DONE struct tbl_loadavg load_ave; table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave)); for (elem = 0; elem < nelem; elem++) loadavg[elem] = (load_ave.tl_lscale == 0 - ? load_ave.tl_avenrun.d[elem] - : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); -#endif /* OSF_ALPHA */ + ? load_ave.tl_avenrun.d[elem] + : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale)); +# endif /* OSF_ALPHA */ -#if !defined (LDAV_DONE) && defined (VMS) +# if ! defined LDAV_DONE && defined __VMS /* VMS specific code -- read from the Load Ave driver. */ LOAD_AVE_TYPE load_ave[3]; - static int getloadavg_initialized = 0; -#ifdef eunice + static bool getloadavg_initialized; +# ifdef eunice struct { int dsc$w_length; char *dsc$a_pointer; } descriptor; -#endif +# endif /* Ensure that there is a channel open to the load ave device. */ if (!getloadavg_initialized) { /* Attempt to open the channel. */ -#ifdef eunice +# ifdef eunice descriptor.dsc$w_length = 18; descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE"; -#else +# else $DESCRIPTOR (descriptor, "LAV0:"); -#endif +# endif if (sys$assign (&descriptor, &channel, 0, 0) & 1) - getloadavg_initialized = 1; + getloadavg_initialized = true; } /* Read the load average vector. */ @@ -788,121 +881,116 @@ getloadavg (loadavg, nelem) load_ave, 12, 0, 0, 0, 0) & 1)) { sys$dassgn (channel); - getloadavg_initialized = 0; + getloadavg_initialized = false; } if (!getloadavg_initialized) return -1; -#endif /* VMS */ +# endif /* ! defined LDAV_DONE && defined __VMS */ -#if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS) +# if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS /* UNIX-specific code -- read the average from /dev/kmem. */ -#define LDAV_PRIVILEGED /* This code requires special installation. */ +# define LDAV_PRIVILEGED /* This code requires special installation. */ LOAD_AVE_TYPE load_ave[3]; /* Get the address of LDAV_SYMBOL. */ if (offset == 0) { -#ifndef sgi -#ifndef NLIST_STRUCT +# ifndef sgi +# ifndef NLIST_STRUCT strcpy (nl[0].n_name, LDAV_SYMBOL); strcpy (nl[1].n_name, ""); -#else /* NLIST_STRUCT */ -#ifdef NLIST_NAME_UNION +# else /* NLIST_STRUCT */ +# ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME nl[0].n_un.n_name = LDAV_SYMBOL; nl[1].n_un.n_name = 0; -#else /* not NLIST_NAME_UNION */ +# else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ nl[0].n_name = LDAV_SYMBOL; nl[1].n_name = 0; -#endif /* not NLIST_NAME_UNION */ -#endif /* NLIST_STRUCT */ +# endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ +# endif /* NLIST_STRUCT */ -#ifndef SUNOS_5 +# ifndef SUNOS_5 if ( -#if !(defined (_AIX) && !defined (ps2)) +# if !(defined (_AIX) && !defined (ps2)) nlist (KERNEL_FILE, nl) -#else /* _AIX */ +# else /* _AIX */ knlist (nl, 1, sizeof (nl[0])) -#endif +# endif >= 0) /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */ { -#ifdef FIXUP_KERNEL_SYMBOL_ADDR +# ifdef FIXUP_KERNEL_SYMBOL_ADDR FIXUP_KERNEL_SYMBOL_ADDR (nl); -#endif +# endif offset = nl[0].n_value; } -#endif /* !SUNOS_5 */ -#else /* sgi */ - int ldav_off; - - ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); - if (ldav_off != -1) - offset = (long) ldav_off & 0x7fffffff; -#endif /* sgi */ - } +# endif /* !SUNOS_5 */ +# else /* sgi */ + int ldav_off; + + ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN); + if (ldav_off != -1) + offset = (long int) ldav_off & 0x7fffffff; +# endif /* sgi */ + } /* Make sure we have /dev/kmem open. */ if (!getloadavg_initialized) { -#ifndef SUNOS_5 - channel = open ("/dev/kmem", 0); +# ifndef SUNOS_5 + channel = open ("/dev/kmem", O_RDONLY); if (channel >= 0) { /* Set the channel to close on exec, so it does not litter any child's descriptor table. */ -#ifdef FD_SETFD -#ifndef FD_CLOEXEC -#define FD_CLOEXEC 1 -#endif - (void) fcntl (channel, F_SETFD, FD_CLOEXEC); -#endif - getloadavg_initialized = 1; + set_cloexec_flag (channel, true); + getloadavg_initialized = true; } -#else /* SUNOS_5 */ +# else /* SUNOS_5 */ /* We pass 0 for the kernel, corefile, and swapfile names to use the currently running kernel. */ kd = kvm_open (0, 0, 0, O_RDONLY, 0); - if (kd != 0) + if (kd != 0) { /* nlist the currently running kernel. */ kvm_nlist (kd, nl); offset = nl[0].n_value; - getloadavg_initialized = 1; + getloadavg_initialized = true; } -#endif /* SUNOS_5 */ +# endif /* SUNOS_5 */ } /* If we can, get the load average values. */ if (offset && getloadavg_initialized) { /* Try to read the load. */ -#ifndef SUNOS_5 +# ifndef SUNOS_5 if (lseek (channel, offset, 0) == -1L || read (channel, (char *) load_ave, sizeof (load_ave)) != sizeof (load_ave)) { close (channel); - getloadavg_initialized = 0; + getloadavg_initialized = false; } -#else /* SUNOS_5 */ +# else /* SUNOS_5 */ if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave)) != sizeof (load_ave)) - { - kvm_close (kd); - getloadavg_initialized = 0; + { + kvm_close (kd); + getloadavg_initialized = false; } -#endif /* SUNOS_5 */ +# endif /* SUNOS_5 */ } if (offset == 0 || !getloadavg_initialized) return -1; -#endif /* LOAD_AVE_TYPE and not VMS */ +# endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */ -#if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ +# if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */ if (nelem > 0) loadavg[elem++] = LDAV_CVT (load_ave[0]); if (nelem > 1) @@ -910,26 +998,23 @@ getloadavg (loadavg, nelem) if (nelem > 2) loadavg[elem++] = LDAV_CVT (load_ave[2]); -#define LDAV_DONE -#endif /* !LDAV_DONE && LOAD_AVE_TYPE */ +# define LDAV_DONE +# endif /* !LDAV_DONE && LOAD_AVE_TYPE */ -#ifdef LDAV_DONE - return elem; -#else +# if !defined LDAV_DONE /* Set errno to zero to indicate that there was no particular error; this function just can't work at all on this system. */ errno = 0; - return -1; -#endif + elem = -1; +# endif + return elem; } #endif /* ! HAVE_GETLOADAVG */ #ifdef TEST -void -main (argc, argv) - int argc; - char **argv; +int +main (int argc, char **argv) { int naptime = 0; @@ -946,7 +1031,7 @@ main (argc, argv) if (loads == -1) { perror ("Error getting load average"); - exit (1); + return EXIT_FAILURE; } if (loads > 0) printf ("1-minute: %f ", avg[0]); @@ -962,6 +1047,6 @@ main (argc, argv) sleep (naptime); } - exit (0); + return EXIT_SUCCESS; } #endif /* TEST */