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SYSINFO

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO

NAME

sysinfo ? returns information on overall system statistics

SYNOPSIS

#include <linux/kernel.h>
#include <linux/sys.h>

int sysinfo(struct sysinfo *info);

DESCRIPTION

sysinfo returns information in the following structure:

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 */

};

sysinfo provides a simple way of getting overall system statistics. This is more portable than reading /dev/kmem. For an example of its use, see intro(2).

RETURN VALUE

On success, zero is returned. On error, ?1 is returned, and errno is set appropriately.

ERRORS

EFAULT

pointer to struct sysinfo is invalid

CONFORMING TO

This function is Linux-specific, and should not be used in programs intended to be portable.

The Linux kernel has a sysinfo system call since 0.98.pl6. Linux libc contains a sysinfo() routine since 5.3.5, and glibc has one since 1.90.


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