/* Get the system load averages.
Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994,
- 1995, 1997, 1999, 2000, 2003 Free Software Foundation, Inc.
+ 1995, 1997, 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
NOTE: The canonical source of this file is maintained with gnulib.
Bugs can be reported to bug-gnulib@gnu.org.
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,
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA. */
/* Compile-time symbols that this file uses:
AC_CHECK_FUNCS(pstat_getdynamic) in your
configure.in file.
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.
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.
- 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:
UMAX4_3
VMS
WINDOWS32 No-op for Windows95/NT.
- __linux__ Linux: assumes /proc filesystem mounted.
+ __linux__ Linux: assumes /proc file system mounted.
Support from Michael K. Johnson.
- __NetBSD__ NetBSD: assumes /kern filesystem mounted.
+ __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.
# include <config.h>
#endif
-#include <sys/types.h>
-
-/* 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 <sys/param.h>
-#endif
-
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
/* Exclude all the code except the test program at the end
- if the system has its own `getloadavg' function.
+ 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. */
+#ifndef HAVE_GETLOADAVG
-#include <errno.h>
+# include <sys/types.h>
-#ifndef errno
-extern int errno;
-#endif
+/* 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 <sys/param.h>
+# endif
-#ifdef HAVE_LOCALE_H
-# include <locale.h>
-#endif
-#ifndef HAVE_SETLOCALE
-# define setlocale(Category, Locale) /* empty */
-#endif
-
-#ifndef HAVE_GETLOADAVG
+# 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
# include <unistd.h>
# endif
-# include <stdio.h>
-
/* 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))
# endif /* sgi */
# ifdef UMAX
-# include <stdio.h>
# include <signal.h>
# include <sys/time.h>
# include <sys/wait.h>
# include <sys/dg_sys_info.h>
# endif
-# if defined (HAVE_FCNTL_H) || defined (_POSIX_VERSION)
-# include <fcntl.h>
-# else
-# include <sys/file.h>
-# endif
+# include <fcntl.h>
+
+# include "unistd-safer.h"
\f
/* Avoid static vars inside a function since in HPUX they dump as pure. */
# ifdef NeXT
static processor_set_t default_set;
-static int getloadavg_initialized;
+static bool getloadavg_initialized;
# endif /* NeXT */
# ifdef UMAX
static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
# endif /* DGUX */
-#if !defined (HAVE_LIBKSTAT) && defined (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;
static kvm_t *kd;
# endif /* SUNOS_5 */
-#endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */
+# endif /* LOAD_AVE_TYPE && !HAVE_LIBKSTAT */
\f
/* Put the 1 minute, 5 minute and 15 minute load averages
into the first NELEM elements of LOADAVG.
# define LINUX_LDAV_FILE "/proc/loadavg"
# endif
- char ldavgbuf[40];
- double load_ave[3];
+ char ldavgbuf[3 * (INT_STRLEN_BOUND (long 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';
- /* 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;
-
- for (elem = 0; elem < nelem && elem < count; elem++)
- loadavg[elem] = load_ave[elem];
+ for (elem = 0; elem < nelem; elem++)
+ {
+ char *endptr;
+ double d = c_strtod (ptr, &endptr);
+ if (ptr == endptr)
+ {
+ if (elem == 0)
+ return -1;
+ break;
+ }
+ loadavg[elem] = d;
+ ptr = endptr;
+ }
return elem;
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. */
if (!getloadavg_initialized)
{
if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
- getloadavg_initialized = 1;
+ getloadavg_initialized = true;
}
if (getloadavg_initialized)
if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
(processor_set_info_t) &info, &info_count)
!= KERN_SUCCESS)
- getloadavg_initialized = 0;
+ getloadavg_initialized = false;
else
{
if (nelem > 0)
/* VMS specific code -- read from the Load Ave driver. */
LOAD_AVE_TYPE load_ave[3];
- static int getloadavg_initialized = 0;
+ static bool getloadavg_initialized;
# ifdef eunice
struct
{
$DESCRIPTOR (descriptor, "LAV0:");
# endif
if (sys$assign (&descriptor, &channel, 0, 0) & 1)
- getloadavg_initialized = 1;
+ getloadavg_initialized = true;
}
/* Read the load average vector. */
load_ave, 12, 0, 0, 0, 0) & 1))
{
sys$dassgn (channel);
- getloadavg_initialized = 0;
+ getloadavg_initialized = false;
}
if (!getloadavg_initialized)
ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
if (ldav_off != -1)
- offset = (long) ldav_off & 0x7fffffff;
+ offset = (long int) ldav_off & 0x7fffffff;
# endif /* sgi */
}
if (!getloadavg_initialized)
{
# ifndef SUNOS_5
- channel = open ("/dev/kmem", 0);
+ channel = fd_safer (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 F_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 */
/* We pass 0 for the kernel, corefile, and swapfile names
/* nlist the currently running kernel. */
kvm_nlist (kd, nl);
offset = nl[0].n_value;
- getloadavg_initialized = 1;
+ getloadavg_initialized = true;
}
# endif /* SUNOS_5 */
}
!= sizeof (load_ave))
{
close (channel);
- getloadavg_initialized = 0;
+ getloadavg_initialized = false;
}
# else /* SUNOS_5 */
if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
!= sizeof (load_ave))
{
kvm_close (kd);
- getloadavg_initialized = 0;
+ getloadavg_initialized = false;
}
# endif /* SUNOS_5 */
}
#endif /* ! HAVE_GETLOADAVG */
\f
#ifdef TEST
-void
+int
main (int argc, char **argv)
{
int naptime = 0;
if (loads == -1)
{
perror ("Error getting load average");
- exit (1);
+ return EXIT_FAILURE;
}
if (loads > 0)
printf ("1-minute: %f ", avg[0]);
sleep (naptime);
}
- exit (0);
+ return EXIT_SUCCESS;
}
#endif /* TEST */
projects / gnulib.git / blobdiff