kernel/sysinfo.c


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#include "types.h"
#include "riscv.h"
#include "param.h"
#include "spinlock.h"
#include "defs.h"
#include "sysinfo.h"
#include "proc.h"

// Get current system info
// addr is a user virtual address, pointing to a struct sysinfo.
int
sys_info(uint64 addr) {
  struct proc *p = myproc();
  struct sysinfo info;

  // Fill nums into the sysinfo struct
  info.freemem = get_freemem();
  info.nproc = get_nproc();

  if(copyout(p->pagetable, addr, (char *)&info, sizeof(info)) < 0)
    return -1;
  return 0;
}