sysdeps/mach/hurd/getrusage.c

   1 /* getrusage -- Get resource usage information about processes.  Hurd version.
   2    Copyright (C) 1999-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <string.h>
  21 #include <sys/resource.h>
  22 #include <mach.h>
  23 #include <mach/task_info.h>
  24 #include <hurd.h>
  25
  26 /* Return resource usage information on process indicated by WHO
  27    and put it in *USAGE.  Returns 0 for success, -1 for failure.  */
  28 int
  29 __getrusage (who, usage)
  30      enum __rusage_who who;
  31      struct rusage *usage;
  32 {
  33   struct task_basic_info bi;
  34   struct task_events_info ei;
  35   struct task_thread_times_info tti;
  36   mach_msg_type_number_t count;
  37   error_t err;
  38
  39   switch (who)
  40     {
  41     case RUSAGE_SELF:
  42       count = TASK_BASIC_INFO_COUNT;
  43       err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
  44                          (task_info_t) &bi, &count);
  45       if (err)
  46         return __hurd_fail (err);
  47
  48       count = TASK_EVENTS_INFO_COUNT;
  49       err = __task_info (__mach_task_self (), TASK_EVENTS_INFO,
  50                          (task_info_t) &ei, &count);
  51       if (err == KERN_INVALID_ARGUMENT) /* microkernel doesn't implement it */
  52         memset (&ei, 0, sizeof ei);
  53       else if (err)
  54         return __hurd_fail (err);
  55
  56       count = TASK_THREAD_TIMES_INFO_COUNT;
  57       err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
  58                          (task_info_t) &tti, &count);
  59       if (err)
  60         return __hurd_fail (err);
  61
  62       time_value_add (&bi.user_time, &tti.user_time);
  63       time_value_add (&bi.system_time, &tti.system_time);
  64
  65       memset (usage, 0, sizeof (struct rusage));
  66
  67       usage->ru_utime.tv_sec = bi.user_time.seconds;
  68       usage->ru_utime.tv_usec = bi.user_time.microseconds;
  69       usage->ru_stime.tv_sec = bi.system_time.seconds;
  70       usage->ru_stime.tv_usec = bi.system_time.microseconds;
  71
  72       /* These statistics map only approximately.  */
  73       usage->ru_majflt = ei.pageins;
  74       usage->ru_minflt = ei.faults - ei.pageins;
  75       usage->ru_msgsnd = ei.messages_sent; /* Mach IPC, not SysV IPC */
  76       usage->ru_msgrcv = ei.messages_received; /* Mach IPC, not SysV IPC */
  77       break;
  78
  79     case RUSAGE_CHILDREN:
  80       /* XXX Not implemented yet.  However, zero out USAGE to be
  81          consistent with the wait3 and wait4 functions.  */
  82       memset (usage, 0, sizeof (struct rusage));
  83
  84       break;
  85
  86     default:
  87       return EINVAL;
  88     }
  89
  90   return 0;
  91 }
  92
  93 weak_alias (__getrusage, getrusage)