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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man2/sysinfo.2
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-.\" Copyright (C) 2016, Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Based on an earlier version of the page where a few pieces were
-.\" copyright (C) 1993 by Dan Miner (dminer@nyx.cs.du.edu) and subsequently
-.\" others (see old changelog below).
-.\" The structure definitions are taken more or less straight from the kernel
-.\" source files.
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\"
-.\" Modified Sat Jul 24 12:35:12 1993 by Rik Faith <faith@cs.unc.edu>
-.\" Modified Tue Oct 22 22:29:51 1996 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified Mon Aug 25 16:06:11 1997 by Nicolás Lichtmaier <nick@debian.org>
-.\"
-.TH sysinfo 2 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-sysinfo \- return system information
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <sys/sysinfo.h>
-.P
-.BI "int sysinfo(struct sysinfo *" info );
-.fi
-.SH DESCRIPTION
-.BR sysinfo ()
-returns certain statistics on memory and swap usage,
-as well as the load average.
-.P
-Until Linux 2.3.16,
-.BR sysinfo ()
-returned information in the following structure:
-.P
-.in +4n
-.EX
-struct sysinfo {
- long uptime; /* Seconds since boot */
- unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
- unsigned long totalram; /* Total usable main memory size */
- unsigned long freeram; /* Available memory size */
- unsigned long sharedram; /* Amount of shared memory */
- unsigned long bufferram; /* Memory used by buffers */
- unsigned long totalswap; /* Total swap space size */
- unsigned long freeswap; /* Swap space still available */
- unsigned short procs; /* Number of current processes */
- char _f[22]; /* Pads structure to 64 bytes */
-};
-.EE
-.in
-.P
-In the above structure, the sizes of the memory and swap fields
-are given in bytes.
-.P
-Since Linux 2.3.23 (i386) and Linux 2.3.48
-(all architectures) the structure is:
-.P
-.in +4n
-.EX
-struct sysinfo {
- long uptime; /* Seconds since boot */
- unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
- unsigned long totalram; /* Total usable main memory size */
- unsigned long freeram; /* Available memory size */
- unsigned long sharedram; /* Amount of shared memory */
- unsigned long bufferram; /* Memory used by buffers */
- unsigned long totalswap; /* Total swap space size */
- unsigned long freeswap; /* Swap space still available */
- unsigned short procs; /* Number of current processes */
- unsigned long totalhigh; /* Total high memory size */
- unsigned long freehigh; /* Available high memory size */
- unsigned int mem_unit; /* Memory unit size in bytes */
- char _f[20\-2*sizeof(long)\-sizeof(int)];
- /* Padding to 64 bytes */
-};
-.EE
-.in
-.P
-In the above structure,
-sizes of the memory and swap fields are given as multiples of
-.I mem_unit
-bytes.
-.SH RETURN VALUE
-On success,
-.BR sysinfo ()
-returns zero.
-On error, \-1 is returned, and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EFAULT
-.I info
-is not a valid address.
-.SH STANDARDS
-Linux.
-.SH HISTORY
-Linux 0.98.pl6.
-.SH NOTES
-All of the information provided by this system call is also available via
-.I /proc/meminfo
-and
-.IR /proc/loadavg .
-.SH SEE ALSO
-.BR proc (5)