src/common/tuklib_exit.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       tuklib_exit.c
   4 /// \brief      Close stdout and stderr, and exit
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #include "tuklib_common.h"
  14
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18
  19 #include "tuklib_gettext.h"
  20 #include "tuklib_progname.h"
  21 #include "tuklib_exit.h"
  22
  23
  24 extern void
  25 tuklib_exit(int status, int err_status, int show_error)
  26 {
  27         if (status != err_status) {
  28                 // Close stdout. If something goes wrong,
  29                 // print an error message to stderr.
  30                 const int ferror_err = ferror(stdout);
  31                 const int fclose_err = fclose(stdout);
  32                 if (ferror_err || fclose_err) {
  33                         status = err_status;
  34
  35                         // If it was fclose() that failed, we have the reason
  36                         // in errno. If only ferror() indicated an error,
  37                         // we have no idea what the reason was.
  38                         if (show_error)
  39                                 fprintf(stderr, "%s: %s: %s\n", progname,
  40                                                 _("Writing to standard "
  41                                                         "output failed"),
  42                                                 fclose_err ? strerror(errno)
  43                                                         : _("Unknown error"));
  44                 }
  45         }
  46
  47         if (status != err_status) {
  48                 // Close stderr. If something goes wrong, there's
  49                 // nothing where we could print an error message.
  50                 // Just set the exit status.
  51                 const int ferror_err = ferror(stderr);
  52                 const int fclose_err = fclose(stderr);
  53                 if (fclose_err || ferror_err)
  54                         status = err_status;
  55         }
  56
  57         exit(status);
  58 }