root/kernel/info.c

/* */

DEFINITIONS

1. sys_sysinfo

   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 <asm/segment.h>
  10 
  11 #include <linux/sched.h>
  12 #include <linux/string.h>
  13 #include <linux/unistd.h>
  14 #include <linux/types.h>
  15 #include <linux/mm.h>
  16 
  17 int sys_sysinfo(struct sysinfo *info)
     /*  */
  18 {
  19         int error;
  20         struct sysinfo val;
  21         struct task_struct **p;
  22 
  23         error = verify_area(VERIFY_WRITE, info, sizeof(struct sysinfo));
  24         if (error)
  25                 return error;
  26         memset((char *)&val, 0, sizeof(struct sysinfo));
  27 
  28         val.uptime = (jiffies + jiffies_offset) / HZ;
  29 
  30         val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
  31         val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
  32         val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
  33 
  34         for (p = &LAST_TASK; p > &FIRST_TASK; p--)
  35                 if (*p) val.procs++;
  36 
  37         si_meminfo(&val);
  38         si_swapinfo(&val);
  39 
  40         memcpy_tofs(info, &val, sizeof(struct sysinfo));
  41         return 0;
  42 }

/* */