root/kernel/syscalls/sysinfo.c

/* */

DEFINITIONS

1. sys_sysinfo

   1 /*
   2  * fiwix/kernel/syscalls/sysinfo.c
   3  *
   4  * Copyright 2018-2021, Jordi Sanfeliu. All rights reserved.
   5  * Distributed under the terms of the Fiwix License.
   6  */
   7 
   8 #include <fiwix/kernel.h>
   9 #include <fiwix/fs.h>
  10 #include <fiwix/system.h>
  11 #include <fiwix/sched.h>
  12 #include <fiwix/mm.h>
  13 #include <fiwix/string.h>
  14 
  15 #ifdef __DEBUG__
  16 #include <fiwix/stdio.h>
  17 #include <fiwix/process.h>
  18 #endif /*__DEBUG__ */
  19 
  20 int sys_sysinfo(struct sysinfo *info)
  21 {
  22         struct sysinfo tmp_info;
  23         struct proc *p;
  24         int errno;
  25 
  26 #ifdef __DEBUG__
  27         printk("(pid %d) sys_sysinfo(0x%08x)\n ", current->pid, (unsigned int)info);
  28 #endif /*__DEBUG__ */
  29 
  30         if((errno = check_user_area(VERIFY_WRITE, info, sizeof(struct sysinfo)))) {
  31                 return errno;
  32         }
  33         memset_b(&tmp_info, NULL, sizeof(struct sysinfo));
  34         tmp_info.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
  35         tmp_info.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
  36         tmp_info.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
  37         tmp_info.uptime = kstat.uptime;
  38         tmp_info.totalram = kstat.total_mem_pages << PAGE_SHIFT;
  39         tmp_info.freeram = kstat.free_pages << PAGE_SHIFT;
  40         tmp_info.sharedram = 0;
  41         tmp_info.bufferram = kstat.buffers * 1024;
  42         tmp_info.totalswap = 0;
  43         tmp_info.freeswap = 0;
  44         FOR_EACH_PROCESS(p) {
  45                 tmp_info.procs++;
  46                 p = p->next;
  47         }
  48 
  49         memcpy_b(info, &tmp_info, sizeof(struct sysinfo));
  50         return 0;
  51 }

/* */