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Imported Upstream version 1.4.16+git20130902

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This commit is contained in:
Jan Wagner 2013-11-26 23:59:47 +01:00
parent e76be63abf
commit e70fb8c051
517 changed files with 44015 additions and 43295 deletions
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234
gl/getloadavg.c
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@ -1,6 +1,6 @@
/* Get the system load averages.
Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2010 Free Software
Copyright (C) 1985-1989, 1991-1995, 1997, 1999-2000, 2003-2013 Free Software
Foundation, Inc.
NOTE: The canonical source of this file is maintained with gnulib.
@ -28,7 +28,7 @@
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.
configure.ac 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.
@ -46,7 +46,7 @@
NLIST_STRUCT Include nlist.h, not a.out.h.
N_NAME_POINTER 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'.
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.
@ -80,52 +80,23 @@
We also #define LDAV_PRIVILEGED if a program will require
special installation to be able to call getloadavg. */
/* "configure" defines CONFIGURING_GETLOADAVG to sidestep problems
with partially-configured source directories. */
#ifndef CONFIGURING_GETLOADAVG
# include <config.h>
# include <stdbool.h>
#endif
#include <config.h>
/* Specification. */
#include <stdlib.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
/* Exclude all the code except the test program at the end
if the system has its own `getloadavg' function. */
#ifndef HAVE_GETLOADAVG
# 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)
# if HAVE_SYS_PARAM_H
# include <sys/param.h>
# endif
# include "c-strtod.h"
# include "cloexec.h"
# include "intprops.h"
/* The existing Emacs configuration files define a macro called
LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
returns the load average multiplied by 100. What we actually want
is a macro called LDAV_CVT, which returns the load average as an
unmultiplied double.
For backwards compatibility, we'll define LDAV_CVT in terms of
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 (BSD) && defined (ultrix)
/* Ultrix behaves like BSD on Vaxen. */
# define BSD
@ -372,7 +343,6 @@
# endif /* NLIST_STRUCT */
# ifdef SUNOS_5
# include <fcntl.h>
# include <kvm.h>
# include <kstat.h>
# endif
@ -461,7 +431,10 @@
# include <sys/dg_sys_info.h>
# endif
# include "fcntl--.h"
# if (defined __linux__ || defined __CYGWIN__ || defined SUNOS_5 \
|| (defined LOAD_AVE_TYPE && ! defined __VMS))
# include <fcntl.h>
# endif
/* Avoid static vars inside a function since in HPUX they dump as pure. */
@ -482,13 +455,13 @@ static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
# if !defined (HAVE_LIBKSTAT) && defined (LOAD_AVE_TYPE)
/* File descriptor open to /dev/kmem or VMS load ave driver. */
static int channel;
/* True iff channel is valid. */
/* True if 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 && ! defined __linux__
static struct nlist nl[2];
static struct nlist name_list[2];
# endif
# ifdef SUNOS_5
@ -500,7 +473,7 @@ static kvm_t *kd;
/* Put the 1 minute, 5 minute and 15 minute load averages
into the first NELEM elements of LOADAVG.
Return the number written (never more than 3, but may be less than NELEM),
or -1 if an error occurred. */
or -1 (setting errno) if an error occurred. */
int
getloadavg (double loadavg[], int nelem)
@ -509,18 +482,17 @@ getloadavg (double loadavg[], int nelem)
# 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;
errno = ENOSYS;
elem = -1;
# endif
# if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT)
# if !defined (LDAV_DONE) && defined (HAVE_LIBKSTAT) /* Solaris <= 2.6 */
/* Use libkstat because we don't have to be root. */
# define LDAV_DONE
kstat_ctl_t *kc;
kstat_t *ksp;
kstat_named_t *kn;
int saved_errno;
kc = kstat_open ();
if (kc == 0)
@ -559,10 +531,13 @@ getloadavg (double loadavg[], int nelem)
}
}
saved_errno = errno;
kstat_close (kc);
errno = saved_errno;
# endif /* HAVE_LIBKSTAT */
# if !defined (LDAV_DONE) && defined (hpux) && defined (HAVE_PSTAT_GETDYNAMIC)
/* HP-UX */
/* Use pstat_getdynamic() because we don't have to be root. */
# define LDAV_DONE
# undef LOAD_AVE_TYPE
@ -579,7 +554,7 @@ getloadavg (double loadavg[], int nelem)
# endif /* hpux && HAVE_PSTAT_GETDYNAMIC */
# if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT
# if ! defined LDAV_DONE && defined HAVE_LIBPERFSTAT /* AIX */
# define LDAV_DONE
# undef LOAD_AVE_TYPE
/* Use perfstat_cpu_total because we don't have to be root. */
@ -596,6 +571,7 @@ getloadavg (double loadavg[], int nelem)
# endif
# if !defined (LDAV_DONE) && (defined (__linux__) || defined (__CYGWIN__))
/* Linux without glibc, Cygwin */
# define LDAV_DONE
# undef LOAD_AVE_TYPE
@ -605,39 +581,54 @@ getloadavg (double loadavg[], int nelem)
char ldavgbuf[3 * (INT_STRLEN_BOUND (int) + sizeof ".00 ")];
char const *ptr = ldavgbuf;
int fd, count;
int fd, count, saved_errno;
fd = open (LINUX_LDAV_FILE, O_RDONLY);
if (fd == -1)
return -1;
count = read (fd, ldavgbuf, sizeof ldavgbuf - 1);
saved_errno = errno;
(void) close (fd);
errno = saved_errno;
if (count <= 0)
return -1;
ldavgbuf[count] = '\0';
for (elem = 0; elem < nelem; elem++)
{
char *endptr;
double d;
double numerator = 0;
double denominator = 1;
errno = 0;
d = c_strtod (ptr, &endptr);
if (ptr == endptr || (d == 0 && errno != 0))
while (*ptr == ' ')
ptr++;
/* Finish if this number is missing, and report an error if all
were missing. */
if (! ('0' <= *ptr && *ptr <= '9'))
{
if (elem == 0)
return -1;
{
errno = ENOTSUP;
return -1;
}
break;
}
loadavg[elem] = d;
ptr = endptr;
while ('0' <= *ptr && *ptr <= '9')
numerator = 10 * numerator + (*ptr++ - '0');
if (*ptr == '.')
for (ptr++; '0' <= *ptr && *ptr <= '9'; ptr++)
numerator = 10 * numerator + (*ptr - '0'), denominator *= 10;
loadavg[elem++] = numerator / denominator;
}
return elem;
# endif /* __linux__ || __CYGWIN__ */
# if !defined (LDAV_DONE) && defined (__NetBSD__)
# if !defined (LDAV_DONE) && defined (__NetBSD__) /* NetBSD < 0.9 */
# define LDAV_DONE
# undef LOAD_AVE_TYPE
@ -657,7 +648,10 @@ getloadavg (double loadavg[], int nelem)
&scale);
(void) fclose (fp);
if (count != 4)
return -1;
{
errno = ENOTSUP;
return -1;
}
for (elem = 0; elem < nelem; elem++)
loadavg[elem] = (double) load_ave[elem] / (double) scale;
@ -666,7 +660,7 @@ getloadavg (double loadavg[], int nelem)
# endif /* __NetBSD__ */
# if !defined (LDAV_DONE) && defined (NeXT)
# if !defined (LDAV_DONE) && defined (NeXT) /* NeXTStep */
# define LDAV_DONE
/* The NeXT code was adapted from iscreen 3.2. */
@ -698,7 +692,10 @@ getloadavg (double loadavg[], int nelem)
}
if (!getloadavg_initialized)
return -1;
{
errno = ENOTSUP;
return -1;
}
# endif /* NeXT */
# if !defined (LDAV_DONE) && defined (UMAX)
@ -732,7 +729,7 @@ getloadavg (double loadavg[], int nelem)
for (i = 0; i < conf.config_maxclass; ++i)
{
struct class_stats stats;
bzero ((char *) &stats, sizeof stats);
memset (&stats, 0, sizeof stats);
desc.sd_type = CPUTYPE_CLASS;
desc.sd_objid = i;
@ -775,7 +772,7 @@ getloadavg (double loadavg[], int nelem)
# 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 *'. */
apparent reason of type 'long int *'. */
dg_sys_info ((long int *) &load_info,
DG_SYS_INFO_LOAD_INFO_TYPE,
DG_SYS_INFO_LOAD_VERSION_0);
@ -825,6 +822,7 @@ getloadavg (double loadavg[], int nelem)
# endif /* OSF_MIPS */
# if !defined (LDAV_DONE) && (defined (__MSDOS__) || defined (WINDOWS32))
/* DJGPP */
# define LDAV_DONE
/* A faithful emulation is going to have to be saved for a rainy day. */
@ -834,7 +832,7 @@ getloadavg (double loadavg[], int nelem)
}
# endif /* __MSDOS__ || WINDOWS32 */
# if !defined (LDAV_DONE) && defined (OSF_ALPHA)
# if !defined (LDAV_DONE) && defined (OSF_ALPHA) /* OSF/1 */
# define LDAV_DONE
struct tbl_loadavg load_ave;
@ -846,7 +844,7 @@ getloadavg (double loadavg[], int nelem)
: (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 */
/* VMS specific code -- read from the Load Ave driver. */
LOAD_AVE_TYPE load_ave[3];
@ -883,10 +881,14 @@ getloadavg (double loadavg[], int nelem)
}
if (!getloadavg_initialized)
return -1;
{
errno = ENOTSUP;
return -1;
}
# endif /* ! defined LDAV_DONE && defined __VMS */
# if ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS
/* IRIX, other old systems */
/* UNIX-specific code -- read the average from /dev/kmem. */
@ -899,38 +901,36 @@ getloadavg (double loadavg[], int nelem)
{
# ifndef sgi
# if ! defined NLIST_STRUCT || ! defined N_NAME_POINTER
strcpy (nl[0].n_name, LDAV_SYMBOL);
strcpy (nl[1].n_name, "");
strcpy (name_list[0].n_name, LDAV_SYMBOL);
strcpy (name_list[1].n_name, "");
# 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;
name_list[0].n_un.n_name = LDAV_SYMBOL;
name_list[1].n_un.n_name = 0;
# else /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
nl[0].n_name = LDAV_SYMBOL;
nl[1].n_name = 0;
name_list[0].n_name = LDAV_SYMBOL;
name_list[1].n_name = 0;
# endif /* not HAVE_STRUCT_NLIST_N_UN_N_NAME */
# endif /* NLIST_STRUCT */
# ifndef SUNOS_5
if (
# if !(defined (_AIX) && !defined (ps2))
nlist (KERNEL_FILE, nl)
nlist (KERNEL_FILE, name_list)
# else /* _AIX */
knlist (nl, 1, sizeof (nl[0]))
knlist (name_list, 1, sizeof (name_list[0]))
# endif
>= 0)
/* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
/* Omit "&& name_list[0].n_type != 0 " -- it breaks on Sun386i. */
{
# ifdef FIXUP_KERNEL_SYMBOL_ADDR
FIXUP_KERNEL_SYMBOL_ADDR (nl);
FIXUP_KERNEL_SYMBOL_ADDR (name_list);
# endif
offset = nl[0].n_value;
offset = name_list[0].n_value;
}
# endif /* !SUNOS_5 */
# else /* sgi */
int ldav_off;
ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
ptrdiff_t ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
if (ldav_off != -1)
offset = (long int) ldav_off & 0x7fffffff;
# endif /* sgi */
@ -940,13 +940,27 @@ getloadavg (double loadavg[], int nelem)
if (!getloadavg_initialized)
{
# 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. */
# ifndef O_CLOEXEC
# define O_CLOEXEC 0
# endif
int fd = open ("/dev/kmem", O_RDONLY | O_CLOEXEC);
if (0 <= fd)
{
/* Set the channel to close on exec, so it does not
litter any child's descriptor table. */
set_cloexec_flag (channel, true);
getloadavg_initialized = true;
# if F_DUPFD_CLOEXEC
if (fd <= STDERR_FILENO)
{
int fd1 = fcntl (fd, F_DUPFD_CLOEXEC, STDERR_FILENO + 1);
close (fd);
fd = fd1;
}
# endif
if (0 <= fd)
{
channel = fd;
getloadavg_initialized = true;
}
}
# else /* SUNOS_5 */
/* We pass 0 for the kernel, corefile, and swapfile names
@ -955,8 +969,8 @@ getloadavg (double loadavg[], int nelem)
if (kd != 0)
{
/* nlist the currently running kernel. */
kvm_nlist (kd, nl);
offset = nl[0].n_value;
kvm_nlist (kd, name_list);
offset = name_list[0].n_value;
getloadavg_initialized = true;
}
# endif /* SUNOS_5 */
@ -985,7 +999,10 @@ getloadavg (double loadavg[], int nelem)
}
if (offset == 0 || !getloadavg_initialized)
return -1;
{
errno = ENOTSUP;
return -1;
}
# endif /* ! defined LDAV_DONE && defined LOAD_AVE_TYPE && ! defined __VMS */
# if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
@ -1000,51 +1017,8 @@ getloadavg (double loadavg[], int nelem)
# endif /* !LDAV_DONE && LOAD_AVE_TYPE */
# 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;
errno = ENOSYS;
elem = -1;
# endif
return elem;
}
#endif /* ! HAVE_GETLOADAVG */
#ifdef TEST
int
main (int argc, char **argv)
{
int naptime = 0;
if (argc > 1)
naptime = atoi (argv[1]);
while (1)
{
double avg[3];
int loads;
errno = 0; /* Don't be misled if it doesn't set errno. */
loads = getloadavg (avg, 3);
if (loads == -1)
{
perror ("Error getting load average");
return EXIT_FAILURE;
}
if (loads > 0)
printf ("1-minute: %f ", avg[0]);
if (loads > 1)
printf ("5-minute: %f ", avg[1]);
if (loads > 2)
printf ("15-minute: %f ", avg[2]);
if (loads > 0)
putchar ('\n');
if (naptime == 0)
break;
sleep (naptime);
}
return EXIT_SUCCESS;
}
#endif /* TEST */