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* misc/Makefile (routines): Add getloadavg.

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* sysdeps/generic/getloadavg.c: New file.
	* sysdeps/mach/getloadavg.c: New file.
	* sysdeps/unix/sysv/linux/getloadavg.c: New file.
This commit is contained in:
Roland McGrath 1999-10-04 05:28:33 +00:00
parent b73549de65
commit 54e9386dfd
5 changed files with 163 additions and 2 deletions
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5
ChangeLog
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@ -1,5 +1,10 @@
1999-10-04 Roland McGrath <roland@baalperazim.frob.com>
* misc/Makefile (routines): Add getloadavg.
* sysdeps/generic/getloadavg.c: New file.
* sysdeps/mach/getloadavg.c: New file.
* sysdeps/unix/sysv/linux/getloadavg.c: New file.
* sysdeps/generic/memrchr.c: New file, adapted from memchr.c.
* sysdeps/i386/bits/string.h (__memrchr): New function.
* string/string.h: Declare memrchr, __memrchr.

5
misc/Makefile
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@ -1,4 +1,4 @@
# Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
# Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -56,7 +56,8 @@ routines := brk sbrk sstk ioctl \
efgcvt efgcvt_r qefgcvt qefgcvt_r \
hsearch hsearch_r tsearch lsearch \
err error ustat \
getsysstats dirname regexp
getsysstats dirname regexp \
getloadavg
include ../Makeconfig

37
sysdeps/generic/getloadavg.c Normal file
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@ -0,0 +1,37 @@
/* Get system load averages. Stub version.
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
/* 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. */
int
getloadavg (double loadavg[], int nelem)
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (getloadavg)
#include <stub-tag.h>

54
sysdeps/mach/getloadavg.c Normal file
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@ -0,0 +1,54 @@
/* Get system load averages. Mach version.
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <mach.h>
#include <mach/host_info.h>
#include <hurd.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
/* 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. */
int
getloadavg (double loadavg[], int nelem)
{
host_load_info_data_t info;
mach_msg_type_number_t size = HOST_LOAD_INFO_COUNT;
error_t err;
int i;
err = __host_info (__mach_host_self (), HOST_LOAD_INFO,
(host_info_t) &info, &size);
if (err)
return __hurd_fail (err);
if (size < HOST_LOAD_INFO_COUNT)
return __hurd_fail (EGRATUITOUS);
if (nelem > 3)
nelem = 3;
for (i = 0; i < nelem; ++i)
loadavg[i] = (double) info.avenrun[i] * (double) LOAD_SCALE;
return i;
}

64
sysdeps/unix/sysv/linux/getloadavg.c Normal file
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@ -0,0 +1,64 @@
/* Get system load averages. Linux (/proc/loadavg) version.
Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
/* 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. */
int
getloadavg (double loadavg[], int nelem)
{
int fd;
fd = __open ("/proc/loadavg", O_RDONLY);
if (fd < 0)
return -1;
else
{
char buf[65], *p;
ssize_t nread;
int i;
nread = __read (fd, buf, sizeof buf - 1);
close (fd);
if (nread < 0)
return -1;
buf[nread - 1] = '\0';
if (nelem > 3)
nelem = 3;
p = buf;
for (i = 0; i < nelem; ++i)
{
char *endp;
loadavg[i] = strtod (p, &endp);
if (!endp || endp == p)
break;
p = endp;
}
return i;
}
}