X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetloadavg.c;h=6ac0a8c5d2b16f017120279bf4e8ca13ce216b5e;hb=ecc43f7ce6220952bac7d8e751ca102c60f9f812;hp=b6824e41385587ba55e0d64f553b1d151924506d;hpb=76486c93c0fdc731b7e3604d3630c3552eed4e80;p=gnulib.git diff --git a/lib/getloadavg.c b/lib/getloadavg.c index b6824e413..6ac0a8c5d 100644 --- a/lib/getloadavg.c +++ b/lib/getloadavg.c @@ -1,6 +1,10 @@ /* Get the system load averages. - Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995 - Free Software Foundation, Inc. + + Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, + 1995, 1997, 1999, 2000, 2003 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 @@ -35,12 +39,17 @@ 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. + HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'. LINUX_LDAV_FILE [__linux__]: File containing load averages. + HAVE_LOCALE_H locale.h is available. + HAVE_SETLOCALE The `setlocale' function is available. Specific system predefines this file uses, aside from setting default values if not emacs: @@ -51,7 +60,7 @@ DGUX eunice UNIX emulator under VMS. hpux - MSDOS No-op for MSDOS. + __MSDOS__ No-op for MSDOS. NeXT sgi sequent Sequent Dynix 3.x.x (BSD) @@ -60,9 +69,9 @@ UMAX UMAX4_3 VMS - WIN32 No-op for Windows95/NT. + WINDOWS32 No-op for Windows95/NT. __linux__ Linux: assumes /proc filesystem mounted. - Support from Michael K. Johnson. + Support from Michael K. Johnson. __NetBSD__ NetBSD: assumes /kern filesystem mounted. In addition, to avoid nesting many #ifdefs, we internally set @@ -81,7 +90,7 @@ /* 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 +#if defined (unix) || defined (__unix) # include #endif @@ -98,8 +107,14 @@ extern int errno; #endif -#ifndef HAVE_GETLOADAVG +#ifdef HAVE_LOCALE_H +# include +#endif +#ifndef HAVE_SETLOCALE +# define setlocale(Category, Locale) /* empty */ +#endif +#ifndef HAVE_GETLOADAVG /* The existing Emacs configuration files define a macro called LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and @@ -111,7 +126,7 @@ 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) +# if !defined (LDAV_CVT) && defined (LOAD_AVE_CVT) # define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) # endif @@ -131,6 +146,12 @@ extern int errno; # 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. */ @@ -149,11 +170,11 @@ extern int errno; # define sun # endif -# if defined(hp300) && !defined(hpux) +# if defined (hp300) && !defined (hpux) # define MORE_BSD # endif -# if defined(ultrix) && defined(mips) +# if defined (ultrix) && defined (mips) # define decstation # endif @@ -161,12 +182,15 @@ extern int errno; # define SVR4 # endif -# if (defined(sun) && defined(SVR4)) || defined (SOLARIS2) +# 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 # endif @@ -230,7 +254,7 @@ extern int errno; # define LOAD_AVE_TYPE long # endif -# if defined(alliant) && defined(i860) /* Alliant FX/2800 */ +# if defined (alliant) && defined (i860) /* Alliant FX/2800 */ # define LOAD_AVE_TYPE long # endif @@ -254,7 +278,7 @@ extern int errno; # 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 @@ -270,7 +294,7 @@ extern int errno; # define FSCALE 2048.0 # endif -# if defined(MIPS) || defined(SVR4) || defined(decstation) +# if defined (MIPS) || defined (SVR4) || defined (decstation) # define FSCALE 256 # endif @@ -278,7 +302,7 @@ extern int errno; /* 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 +# define FSCALE 1000.0 # endif # if defined (ardent) && defined (titan) @@ -296,72 +320,16 @@ extern int errno; # endif /* Not FSCALE. */ # if !defined (LDAV_CVT) && defined (FSCALE) -# define LDAV_CVT(n) (((double) (n)) / 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 - -# ifdef 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 - -# if defined (ardent) && defined (titan) -# define NLIST_STRUCT -# endif - -# ifdef tek4300 -# define NLIST_STRUCT -# endif - -# ifdef butterfly +# if HAVE_NLIST_H # define NLIST_STRUCT # endif +# endif -# if defined(alliant) && defined(i860) /* Alliant FX/2800 */ -# define NLIST_STRUCT -# endif - -# ifdef _AIX -# define NLIST_STRUCT -# endif - -# endif /* defined (NLIST_STRUCT) */ - - -# if defined(sgi) || (defined(mips) && !defined(BSD)) +# if defined (sgi) || (defined (mips) && !defined (BSD)) # define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31)) # endif @@ -374,7 +342,7 @@ extern int errno; # define KERNEL_FILE "/hp-ux" # endif -# if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || (defined (ardent) && defined (titan))) +# if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan))) # define KERNEL_FILE "/unix" # endif @@ -383,7 +351,7 @@ extern int errno; # 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)) +# 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 @@ -395,7 +363,7 @@ extern int errno; /* 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)) +# if !defined (LOAD_AVE_TYPE) && (defined (BSD) || defined (LDAV_CVT) || defined (KERNEL_FILE) || defined (LDAV_SYMBOL)) # define LOAD_AVE_TYPE double # endif @@ -444,6 +412,14 @@ extern int errno; # endif /* LOAD_AVE_TYPE */ +# 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 @@ -483,7 +459,7 @@ extern int errno; # include # endif -# if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION) +# if defined (HAVE_FCNTL_H) || defined (_POSIX_VERSION) # include # else # include @@ -505,7 +481,7 @@ static unsigned int samples; static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */ # 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. */ @@ -513,7 +489,7 @@ static int getloadavg_initialized; /* Offset in kmem to seek to read load average, or 0 means invalid. */ static long offset; -# if !defined(VMS) && !defined(sgi) && !defined(__linux__) +# if !defined (VMS) && !defined (sgi) && !defined (__linux__) static struct nlist nl[2]; # endif /* Not VMS or sgi */ @@ -521,7 +497,7 @@ static struct nlist nl[2]; static kvm_t *kd; # 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. @@ -529,9 +505,7 @@ 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. */ @@ -543,7 +517,7 @@ getloadavg (loadavg, nelem) elem = -1; # endif -# if !defined (LDAV_DONE) && defined (SUNOS_5) +# if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) /* Use libkstat because we don't have to be root. */ # define LDAV_DONE kstat_ctl_t *kc; @@ -554,7 +528,7 @@ getloadavg (loadavg, nelem) if (kc == 0) return -1; ksp = kstat_lookup (kc, "unix", 0, "system_misc"); - if (ksp == 0 ) + if (ksp == 0) return -1; if (kstat_read (kc, ksp, 0) == -1) return -1; @@ -569,26 +543,26 @@ getloadavg (loadavg, nelem) } if (nelem >= 1) - loadavg[elem++] = (double) kn->value.ul/FSCALE; + 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; + 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; + loadavg[elem++] = (double) kn->value.ul / FSCALE; } } } kstat_close (kc); -# endif /* SUNOS_5 */ +# endif /* HAVE_LIBKSTAT */ # if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC) /* Use pstat_getdynamic() because we don't have to be root. */ @@ -627,8 +601,11 @@ getloadavg (loadavg, nelem) if (count <= 0) return -1; + /* The following sscanf must use the C locale. */ + setlocale (LC_NUMERIC, "C"); count = sscanf (ldavgbuf, "%lf %lf %lf", &load_ave[0], &load_ave[1], &load_ave[2]); + setlocale (LC_NUMERIC, ""); if (count < 1) return -1; @@ -826,7 +803,7 @@ getloadavg (loadavg, nelem) : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale)); # endif /* OSF_MIPS */ -# if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32)) +# 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. */ @@ -834,7 +811,7 @@ getloadavg (loadavg, nelem) { loadavg[elem] = 0.0; } -# endif /* MSDOS */ +# endif /* __MSDOS__ || WINDOWS32 */ # if !defined (LDAV_DONE) && defined (OSF_ALPHA) # define LDAV_DONE @@ -844,8 +821,8 @@ getloadavg (loadavg, nelem) 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)); + ? 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) @@ -888,7 +865,7 @@ getloadavg (loadavg, nelem) return -1; # endif /* 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. */ @@ -904,13 +881,13 @@ getloadavg (loadavg, nelem) strcpy (nl[0].n_name, LDAV_SYMBOL); strcpy (nl[1].n_name, ""); # else /* NLIST_STRUCT */ -# ifdef NLIST_NAME_UNION +# 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 /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */ # endif /* NLIST_STRUCT */ # ifndef SUNOS_5 @@ -947,7 +924,7 @@ getloadavg (loadavg, nelem) { /* Set the channel to close on exec, so it does not litter any child's descriptor table. */ -# ifdef FD_SETFD +# ifdef F_SETFD # ifndef FD_CLOEXEC # define FD_CLOEXEC 1 # endif @@ -984,9 +961,9 @@ getloadavg (loadavg, nelem) # 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 = 0; } # endif /* SUNOS_5 */ } @@ -1020,9 +997,7 @@ getloadavg (loadavg, nelem) #ifdef TEST void -main (argc, argv) - int argc; - char **argv; +main (int argc, char **argv) { int naptime = 0;