SYSINFO(2)          Linux Programmer's Manual          SYSINFO(2)

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.

Linux 0.99.10              24 July 1993                         1