minix/lib/libsys/getsysinfo.c

   1
   2 #include "syslib.h"
   3
   4 #include <string.h>
   5 #include <minix/sysinfo.h>
   6 #include <minix/com.h>
   7
   8 int getsysinfo(
   9   endpoint_t who,               /* from whom to request info */
  10   int what,                     /* what information is requested */
  11   void *where,                  /* where to put it */
  12   size_t size                   /* how big it should be */
  13 )
  14 {
  15   message m;
  16   int call_nr;
  17
  18   switch (who) {
  19   case PM_PROC_NR: call_nr = PM_GETSYSINFO; break;
  20   case VFS_PROC_NR: call_nr = VFS_GETSYSINFO; break;
  21   case RS_PROC_NR: call_nr = RS_GETSYSINFO; break;
  22   case DS_PROC_NR: call_nr = DS_GETSYSINFO; break;
  23   default:
  24         return ENOSYS;
  25   }
  26
  27   memset(&m, 0, sizeof(m));
  28   m.m_lsys_getsysinfo.what = what;
  29   m.m_lsys_getsysinfo.where = (vir_bytes)where;
  30   m.m_lsys_getsysinfo.size = size;
  31   return _taskcall(who, call_nr, &m);
  32 }