SYSINFO (2)

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.