apps/cat.cpp

   1 /*
   2 lightOS application
   3 Copyright (C) 2006-2008 Jörg Pfähler
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  18 */
  19 #include <iostream>
  20 #include <utility>
  21 #include <lightOS/lightOS.hpp>
  22 using namespace std;
  23 using namespace lightOS;
  24
  25 #include <stdio.h>
  26
  27 void show_stdin()
  28 {
  29         while (true)
  30         {
  31                 char buf;
  32                 if (fread(&buf, 1, 1, stdin) != 1)
  33                         return;
  34                 cout << buf;
  35         }
  36 }
  37 int main(int argc, char **argv)
  38 {
  39         if (argc == 1)show_stdin();
  40         else
  41         {
  42                 for (int i=1;i < argc;i++)
  43                 {
  44                         if (strcmp(argv[i], "-") == 0)
  45                                 show_stdin();
  46                         else
  47                         {
  48                                 file File(argv[i], access::read);
  49                                 if (File)
  50                                 {
  51                                         if (File.filetype() == file::block)
  52                                         {
  53                                                 if (File.blockcount() != 0)
  54                                                 {
  55                                                         size_t size = File.blocksize() * File.blockcount();
  56                                                         auto_array<char> data(new char[size+1]);
  57                                                         if (File.read(data.get(), 0, size) != size)return -1;
  58                                                         data.get()[size] = '\0';
  59                                                         cout << data.get();
  60                                                 }
  61                                         }
  62                                         else cerr << "cat: \"" << argv[i] << "\" is not a block file" << endl;
  63                                 }
  64                                 else cerr << "cat: could not open the file \"" << argv[i] << "\"" << endl;
  65                         }
  66                 }
  67         }
  68         return 0;
  69 }