libstdc++-v3/testsuite/27_io/basic_filebuf/showmanyc/char/9533-1.cc

   1 // { dg-require-fork "" }
   2 // { dg-require-mkfifo "" }
   3
   4 // Copyright (C) 2003-2020 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 27.8.1.4 Overridden virtual functions
  22
  23 #include <unistd.h>
  24 #include <signal.h>
  25 #include <fcntl.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <fstream>
  29 #include <cstdlib>
  30 #include <testsuite_hooks.h>
  31
  32 // libstdc++/9533
  33 void test_01()
  34 {
  35   using namespace std;
  36   using namespace __gnu_test;
  37   const char* name = "tmp_fifo1";
  38
  39   const int count = 10000;
  40
  41   signal(SIGPIPE, SIG_IGN);
  42   unlink(name);
  43
  44   if (0 != mkfifo(name, S_IRWXU))
  45     {
  46       VERIFY( false );
  47     }
  48
  49   int fval = fork();
  50   if (fval == -1)
  51     {
  52       unlink(name);
  53       VERIFY( false );
  54     }
  55   else if (fval == 0)
  56     {
  57       filebuf ofbuf;
  58       ofbuf.open(name, ios_base::in|ios_base::out);
  59       VERIFY( ofbuf.is_open() );
  60       sleep(1);
  61
  62       for (int i = 0; i < count; ++i)
  63         ofbuf.sputc(i % 100);
  64
  65       ofbuf.pubsync();
  66       sleep(1);
  67       ofbuf.close();
  68       exit(0);
  69     }
  70
  71   filebuf ifbuf;
  72   ifbuf.open(name, ios_base::in);
  73   VERIFY( ifbuf.is_open() );
  74
  75   for (int j = 0; j < count; ++j)
  76     {
  77       filebuf::int_type c1 = ifbuf.sbumpc();
  78       VERIFY( c1 == j % 100 );
  79     }
  80
  81   filebuf::int_type c6 = ifbuf.sbumpc();
  82   VERIFY( c6 == filebuf::traits_type::eof() );
  83
  84   sleep(2);
  85   ifbuf.close();
  86
  87   unlink(name);
  88 }
  89
  90 int
  91 main()
  92 {
  93   test_01();
  94   return 0;
  95 }
  96