src/common/tuklib_exit.c

   1 // SPDX-License-Identifier: 0BSD
   2
   3 ///////////////////////////////////////////////////////////////////////////////
   4 //
   5 /// \file       tuklib_exit.c
   6 /// \brief      Close stdout and stderr, and exit
   7 //
   8 //  Author:     Lasse Collin
   9 //
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #include "tuklib_common.h"
  13
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17
  18 #include "tuklib_gettext.h"
  19 #include "tuklib_progname.h"
  20 #include "tuklib_exit.h"
  21
  22
  23 extern void
  24 tuklib_exit(int status, int err_status, int show_error)
  25 {
  26         if (status != err_status) {
  27                 // Close stdout. If something goes wrong,
  28                 // print an error message to stderr.
  29                 const int ferror_err = ferror(stdout);
  30                 const int fclose_err = fclose(stdout);
  31                 if (ferror_err || fclose_err) {
  32                         status = err_status;
  33
  34                         // If it was fclose() that failed, we have the reason
  35                         // in errno. If only ferror() indicated an error,
  36                         // we have no idea what the reason was.
  37                         if (show_error)
  38                                 fprintf(stderr, "%s: %s: %s\n", progname,
  39                                                 _("Writing to standard "
  40                                                         "output failed"),
  41                                                 fclose_err ? strerror(errno)
  42                                                         : _("Unknown error"));
  43                 }
  44         }
  45
  46         if (status != err_status) {
  47                 // Close stderr. If something goes wrong, there's
  48                 // nothing where we could print an error message.
  49                 // Just set the exit status.
  50                 const int ferror_err = ferror(stderr);
  51                 const int fclose_err = fclose(stderr);
  52                 if (fclose_err || ferror_err)
  53                         status = err_status;
  54         }
  55
  56         exit(status);
  57 }