[Boost-bugs] [Boost C++ Libraries] #13125: parse_config_file silently ignores IO errors

Subject: [Boost-bugs] [Boost C++ Libraries] #13125: parse_config_file silently ignores IO errors
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-07-16 12:21:46

#13125: parse_config_file silently ignores IO errors
-------------------------------------------------+-------------------------
 Reporter:  Johannes Spangenberg                 |      Owner:  Vladimir
  <johannes.spangenberg@…>                       |  Prus
     Type:  Bugs                                 |     Status:  new
Milestone:  To Be Determined                     |  Component:
                                                 |  program_options
  Version:  Boost Release Branch                 |   Severity:  Problem
 Keywords:                                       |
-------------------------------------------------+-------------------------
 The function `parse_config_file` silently ignores I/O errors while reading
 the configuration file.

 A easy way to reproduce the bug is to specify a directory as configuration
 file. On Linux, `open` will succeed but subsequent calls to `read` will
 fail with `EISDIR`.

 ---

 Minimal and complete program to reproduce the problem:

 {{{#!c++
 #include <cerrno>
 #include <iostream>

 #include <boost/program_options.hpp>

 using namespace boost::program_options;

 int main(int argc, char *argv[])
 {
     if (argc != 2) {
         std::cerr << "Invalid amount of arguments" << std::endl;
         return 1;
     }

     try {
         options_description desc("Desc");
         variables_map vm;
         store(parse_config_file<char>(argv[1], desc), vm);
         notify(vm);
     } catch (error &e) {
         std::cerr << "Error: " << e.what() << std::endl;
         return 1;
     }
     std::cerr << "Everything fine" << std::endl;
     return 0;
 }
 }}}
 {{{
 $ ./a.out some-non-existent-file
 Error: can not read options configuration file 'some-non-existent-file'
 $ ./a.out .
 Everything fine
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13125>
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