src/lxc/error.c

   1 /*
   2  * lxc: linux Container library
   3  *
   4  * (C) Copyright IBM Corp. 2007, 2008
   5  *
   6  * Authors:
   7  * Daniel Lezcano <dlezcano at fr.ibm.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <sys/wait.h>
  27 #include "error.h"
  28 #include "log.h"
  29
  30 lxc_log_define(lxc_error, lxc);
  31
  32 /*---------------------------------------------------------------------------*/
  33 /* lxc_error_set_and_log
  34  * function is here to convert
  35  * the reported status to an exit code as detailed here:
  36  *
  37  *   0-126       exit code of the application
  38  *   128+n       signal n received by the application
  39  *   255         lxc error
  40  */
  41 extern int  lxc_error_set_and_log(int pid, int status)
  42 {
  43         int ret = 0;
  44
  45         if (WIFEXITED(status)) {
  46                 ret = WEXITSTATUS(status);
  47                 if (ret)
  48                         INFO("child <%d> ended on error (%d)", pid, ret);
  49         }
  50
  51         if (WIFSIGNALED(status)) {
  52                 int signal = WTERMSIG(status);
  53                 ret = ret + 128 + signal;
  54
  55                 INFO("child <%d> ended on signal (%d)", pid, signal);
  56         }
  57
  58         return ret;
  59 }