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.
-
- The declaration of `errno' is needed by the test program
- as well as the function itself, so it comes first. */
+ if the system has its own `getloadavg' function. */
-#include <errno.h>
+#ifndef HAVE_GETLOADAVG
-#ifndef errno
-extern int errno;
-#endif
+# include <sys/types.h>
-#ifdef HAVE_LOCALE_H
-# include <locale.h>
-#endif
-#ifndef HAVE_SETLOCALE
-# define setlocale(Category, Locale) ((char *) NULL)
-#endif
-
-#include "cloexec.h"
-#include "xalloc.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
-#ifndef HAVE_GETLOADAVG
+# include "c-strtod.h"
+# include "cloexec.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>
+# include <limits.h>
/* LOAD_AVE_TYPE should only get defined if we're going to use the
nlist method. */
# endif /* sgi */
# ifdef UMAX
-# include <stdio.h>
# include <signal.h>
# include <sys/time.h>
# include <sys/wait.h>
# ifdef NeXT
static processor_set_t default_set;
-static int getloadavg_initialized;
+static bool getloadavg_initialized;
# endif /* NeXT */
# ifdef UMAX
# 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;
# define LINUX_LDAV_FILE "/proc/loadavg"
# endif
- char ldavgbuf[40];
- double load_ave[3];
+/* Upper bound on the string length of an integer converted to string.
+ 302 / 1000 is ceil (log10 (2.0)). Subtract 1 for the sign bit;
+ add 1 for integer division truncation; add 1 more for a minus sign. */
+# define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 2)
+
+ char ldavgbuf[3 * (INT_STRLEN_BOUND (long int) + sizeof ".00")];
+ char const *ptr = ldavgbuf;
int fd, count;
- char *old_locale;
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. */
- old_locale = setlocale (LC_NUMERIC, NULL);
- if (old_locale)
- old_locale = xstrdup (old_locale);
- setlocale (LC_NUMERIC, "C");
- count = sscanf (ldavgbuf, "%lf %lf %lf",
- &load_ave[0], &load_ave[1], &load_ave[2]);
- setlocale (LC_NUMERIC, old_locale);
- free (old_locale);
- 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 */
}
/* Set the channel to close on exec, so it does not
litter any child's descriptor table. */
set_cloexec_flag (channel, true);
- getloadavg_initialized = 1;
+ 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