kernel/info.c

24127 /*
24128  * linux/kernel/info.c
24129  *
24130  * Copyright (C) 1992 Darren Senn
24131  */
24132 
24133 /* This implements the sysinfo() system call */
24134 
24135 #include <linux/mm.h>
24136 #include <linux/unistd.h>
24137 #include <linux/swap.h>
24138 #include <linux/smp_lock.h>
24139 
24140 #include <asm/uaccess.h>
24141 
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24142 asmlinkage int sys_sysinfo(struct sysinfo *info)
24143 {
24144   struct sysinfo val;
24145 
24146   memset((char *)&val, 0, sizeof(struct sysinfo));
24147 
24148   cli();
24149   val.uptime = jiffies / HZ;
24150 
24151   val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
24152   val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
24153   val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
24154 
24155   val.procs = nr_tasks-1;
24156   sti();
24157 
24158   si_meminfo(&val);
24159   si_swapinfo(&val);
24160 
24161   if (copy_to_user(info, &val, sizeof(struct sysinfo)))
24162     return -EFAULT;
24163   return 0;
24164 }