minix/lib/libsys/sys_getinfo.c

   1
   2 #include <string.h>
   3 #include <sys/param.h>
   4 #include "syslib.h"
   5
   6 /*===========================================================================*
   7  *                                sys_getinfo                                *
   8  *===========================================================================*/
   9 int sys_getinfo(request, ptr, len, ptr2, len2)
  10 int request;                            /* system info requested */
  11 void *ptr;                              /* pointer where to store it */
  12 int len;                                /* max length of value to get */
  13 void *ptr2;                             /* second pointer */
  14 int len2;                               /* length or process nr */
  15 {
  16     message m;
  17
  18     m.m_lsys_krn_sys_getinfo.request = request;
  19     m.m_lsys_krn_sys_getinfo.endpt = SELF;      /* always store values at caller */
  20     m.m_lsys_krn_sys_getinfo.val_ptr = (vir_bytes)ptr;
  21     m.m_lsys_krn_sys_getinfo.val_len = len;
  22     m.m_lsys_krn_sys_getinfo.val_ptr2 = (vir_bytes)ptr2;
  23     m.m_lsys_krn_sys_getinfo.val_len2_e = len2;
  24
  25     return(_kernel_call(SYS_GETINFO, &m));
  26 }
  27
  28 /*===========================================================================*
  29  *                                sys_whoami                                 *
  30  *===========================================================================*/
  31 int sys_whoami(endpoint_t *who_ep, char *who_name, int len,
  32         int *priv_flags, int *init_flags)
  33 {
  34         message m;
  35         int r;
  36         int lenmin;
  37
  38         m.m_lsys_krn_sys_getinfo.request = GET_WHOAMI;
  39
  40         if(len < 2)
  41                 return EINVAL;
  42
  43         if((r = _kernel_call(SYS_GETINFO, &m)) != OK)
  44                 return r;
  45
  46         lenmin = MIN((size_t) len, sizeof(m.m_krn_lsys_sys_getwhoami.name)) - 1;
  47
  48         strncpy(who_name, m.m_krn_lsys_sys_getwhoami.name, lenmin);
  49         who_name[lenmin] = '\0';
  50         *who_ep = m.m_krn_lsys_sys_getwhoami.endpt;
  51         *priv_flags = m.m_krn_lsys_sys_getwhoami.privflags;
  52         *init_flags = m.m_krn_lsys_sys_getwhoami.initflags;
  53
  54         return OK;
  55 }
  56