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.