kernel/info.c

   1 /*
   2  * linux/kernel/info.c
   3  *
   4  * Copyright (C) 1992 Darren Senn
   5  */
   6
   7 /* This implements the sysinfo() system call */
   8
   9 #include <linux/mm.h>
  10 #include <linux/unistd.h>
  11 #include <linux/swap.h>
  12 #include <linux/smp_lock.h>
  13
  14 #include <asm/uaccess.h>
  15
  16 asmlinkage long sys_sysinfo(struct sysinfo *info)
  17 {
  18         struct sysinfo val;
  19
  20         memset((char *)&val, 0, sizeof(struct sysinfo));
  21
  22         cli();
  23         val.uptime = jiffies / HZ;
  24
  25         val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
  26         val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
  27         val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
  28
  29         val.procs = nr_threads-1;
  30         sti();
  31
  32         si_meminfo(&val);
  33         si_swapinfo(&val);
  34
  35         if (copy_to_user(info, &val, sizeof(struct sysinfo)))
  36                 return -EFAULT;
  37         return 0;
  38 }