source: trunk/yat/utility/OptionFile.cc @ 1706

Last change on this file since 1706 was 1628, checked in by Peter, 13 years ago

improving exception message

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.5 KB
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1// $Id: OptionFile.cc 1628 2008-11-17 21:24:18Z peter $
2
3/*
4  Copyright (C) 2007 Jari Häkkinen, Peter Johansson
5  Copyright (C) 2008 Peter Johansson
6
7  This file is part of the yat library, http://dev.thep.lu.se/yat
8
9  The yat library is free software; you can redistribute it and/or
10  modify it under the terms of the GNU General Public License as
11  published by the Free Software Foundation; either version 3 of the
12  License, or (at your option) any later version.
13
14  The yat 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  General Public License for more details.
18
19  You should have received a copy of the GNU General Public License
20  along with yat. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "OptionFile.h"
24#include "Exception.h"
25#include "FileUtil.h"
26
27#include <string>
28
29namespace theplu {
30namespace yat {
31namespace utility {
32
33
34  OptionFile::OptionFile(CommandLine& cmd, std::string flag, std::string desc, 
35                         bool required, bool exist, std::string bits)
36    : OptionArg<std::string>(cmd, flag, desc, required), exist_(exist), 
37      bits_(bits) {}
38
39
40  OptionFile::~OptionFile(void)
41  {
42  }
43
44
45  void OptionFile::do_validate2() const
46  {   
47    if (!present())
48      return;
49    FileUtil fu(value().c_str());
50    bool exists=false;
51    try {
52      exists = fu.exists();
53    }
54    catch (IO_error& e) {
55      std::stringstream ss;
56      ss << "cannot stat `" << value() << "': " << strerror(errno);
57      errno = 0;
58      throw cmd_error(ss.str());
59    }
60    if (exist_ && !exists){
61      std::stringstream ss;
62      ss << "cannot stat `" << value() << "': No such file or directory";
63      throw cmd_error(ss.str());
64    }
65    if (fu.permissions(bits_)) {
66      // Peter, this loop is stupid but I wanna differentiate the error message
67      for (std::string::const_iterator iter; iter!=bits_.end(); ++iter){
68        if (*iter=='r' && fu.permissions("r")){
69          std::stringstream ss;
70          ss << "cannot open `" << value() << "' for reading: Permission denied";
71          throw cmd_error(ss.str());
72        }
73        else if (*iter=='w' && fu.permissions("w")){
74          std::stringstream ss;
75          ss << "cannot create file `" << value() 
76             << "': Permission denied";
77          throw cmd_error(ss.str());
78        }
79        else if (*iter=='d' && fu.permissions("d")){
80          std::stringstream ss;
81          ss << value() 
82             << "': Not a directory";
83          throw cmd_error(ss.str());
84        }
85      }
86      std::stringstream ss;
87      ss << value() << ": Permission denied";
88      throw cmd_error(ss.str());
89    }
90  }
91
92
93}}} // of namespace utility, yat, and theplu
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