/* Get the system load averages.
Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994,
- 1995, 1997, 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 1995, 1997, 1999, 2000, 2003, 2004, 2005, 2006 Free Software
+ Foundation, Inc.
NOTE: The canonical source of this file is maintained with gnulib.
Bugs can be reported to bug-gnulib@gnu.org.
the nlist n_name element is a pointer,
not an array.
HAVE_STRUCT_NLIST_N_UN_N_NAME `n_un.n_name' is member of `struct nlist'.
- LINUX_LDAV_FILE [__linux__]: File containing load averages.
+ LINUX_LDAV_FILE [__linux__, __CYGWIN__]: File containing
+ load averages.
Specific system predefines this file uses, aside from setting
default values if not emacs:
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
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
+/* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems
+ with partially-configured source directories. */
+
+#ifndef CONFIGURING_GETLOADAVG
# include <config.h>
+# include <stdbool.h>
#endif
#include <errno.h>
-#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
# endif
-# ifndef FSCALE
+# ifndef FSCALE
/* SunOS and some others define FSCALE in sys/param.h. */
# define LDAV_SYMBOL "avenrun"
# endif
-# ifdef HAVE_UNISTD_H
-# include <unistd.h>
-# endif
+# include <unistd.h>
/* LOAD_AVE_TYPE should only get defined if we're going to use the
nlist method. */
# ifdef LOAD_AVE_TYPE
-# ifndef VMS
+# ifndef __VMS
# ifndef __linux__
# ifndef NLIST_STRUCT
# include <a.out.h>
# endif /* LDAV_SYMBOL */
# endif /* __linux__ */
-# else /* VMS */
+# else /* __VMS */
# ifndef eunice
# include <iodef.h>
# else /* eunice */
# include <vms/iodef.h>
# endif /* eunice */
-# endif /* VMS */
+# endif /* __VMS */
# ifndef LDAV_CVT
# define LDAV_CVT(n) ((double) (n))
# include <sys/dg_sys_info.h>
# endif
-# include <fcntl.h>
-
-# include "unistd-safer.h"
+# include "fcntl--.h"
\f
/* Avoid static vars inside a function since in HPUX they dump as pure. */
/* 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 */
+# endif
# ifdef SUNOS_5
static kvm_t *kd;
# endif /* hpux && HAVE_PSTAT_GETDYNAMIC */
-# if !defined (LDAV_DONE) && defined (__linux__)
+# if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__))
# define LDAV_DONE
# undef LOAD_AVE_TYPE
# define LINUX_LDAV_FILE "/proc/loadavg"
# endif
- char ldavgbuf[3 * (INT_STRLEN_BOUND (long int) + sizeof ".00")];
+ char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")];
char const *ptr = ldavgbuf;
int fd, count;
return elem;
-# endif /* __linux__ */
+# endif /* __linux__ || __CYGWIN__ */
# if !defined (LDAV_DONE) && defined (__NetBSD__)
# define LDAV_DONE
: (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];
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. */
if (!getloadavg_initialized)
{
# ifndef SUNOS_5
- channel = fd_safer (open ("/dev/kmem", O_RDONLY));
+ channel = open ("/dev/kmem", O_RDONLY);
if (channel >= 0)
{
/* Set the channel to close on exec, so it does not
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 (nelem > 0)
# 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;
+ elem = -1;
# endif
+ return elem;
}
#endif /* ! HAVE_GETLOADAVG */