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2002-01-28 Paolo Carlini <pcarlini@unitus.it> Charles Leggett <CGLeggett@lbl.gov> * testsuite/27_io/filebuf_members.cc (test_05): Add test. Co-Authored-By: Charles Leggett <CGLeggett@lbl.gov> From-SVN: r49297
205 lines
4.9 KiB
C++
205 lines
4.9 KiB
C++
// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// 27.8.1.3 filebuf member functions
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// @require@ %-*.tst %-*.txt
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// @diff@ %-*.tst %-*.txt
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// various tests for filebuf::open() and filebuf::close() including
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// the non-portable functionality in the libstdc++-v3 IO library
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#include <iostream>
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#include <fstream>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <testsuite_hooks.h>
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const char name_01[] = "filebuf_members-1.tst";
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const char name_02[] = "filebuf_members-1.txt";
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// Test member functions.
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void test_01()
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{
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bool test = true;
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const char* name_03 = "filebuf_members-3"; // empty file, need to create
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std::filebuf fb_01; // in
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std::filebuf fb_02; // out
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std::filebuf fb_03; // in | out
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// bool is_open()
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VERIFY( !fb_01.is_open() );
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VERIFY( !fb_02.is_open() );
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VERIFY( !fb_03.is_open() );
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// filebuf_type* open(const char* __s, ios_base::openmode __mode)
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fb_01.open(name_01, std::ios_base::in | std::ios_base::ate);
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fb_02.open(name_02, std::ios_base::in | std::ios_base::out
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| std::ios_base::trunc);
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// Try to open two different files without closing the first:
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// Should keep the old file attached, and disregard attempt to overthrow.
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fb_02.open(name_03, std::ios_base::in | std::ios_base::out);
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fb_03.open(name_03, std::ios_base::out | std::ios_base::trunc);
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VERIFY( fb_01.is_open() );
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VERIFY( fb_02.is_open() );
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VERIFY( fb_03.is_open() );
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// filebuf_type* close()
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fb_01.close();
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fb_02.close();
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fb_03.close();
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VERIFY( !fb_01.is_open() );
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VERIFY( !fb_02.is_open() );
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VERIFY( !fb_03.is_open() );
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}
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// Verify that std::filebuf doesn't close files that it didn't open
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// when using the following std::filebuf ctor:
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//
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// std::filebuf(__c_file_type* __f,
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// ios_base::openmode __mode,
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// int_type __s);
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//
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// Thanks to "George T. Talbot" <george@moberg.com> for uncovering
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// this bug/situation.
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void test_02()
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{
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bool test = true;
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int close_num;
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// read (ext)
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FILE* f2 = fopen(name_01, "r");
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VERIFY( f2 != NULL );
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{
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std::filebuf fb(f2, std::ios_base::in, 512);
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}
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close_num = fclose(f2);
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VERIFY( close_num == 0 );
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// read (standard)
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FILE* f = fopen(name_01, "r");
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VERIFY( f != NULL );
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{
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std::ifstream ifstream1(name_01);
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VERIFY( ifstream1.is_open() );
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std::ios_base::iostate st01 = ifstream1.rdstate();
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VERIFY( st01 == std::ios_base::goodbit );
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}
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close_num = fclose(f);
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VERIFY( close_num == 0 );
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}
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void test_03()
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{
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bool test = true;
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int first_fd = ::open(name_01, O_RDONLY);
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VERIFY( first_fd != -1 );
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FILE* first_file = ::fdopen(first_fd, "r");
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VERIFY( first_file != NULL );
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std::filebuf fb (first_file, std::ios_base::in);
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int second_fd = fb.fd();
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VERIFY( first_fd == second_fd );
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}
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// libstdc++/2913, libstdc++/4879
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// John Fardo <jfardo@laurelnetworks.com>, Brad Garcia <garsh@attbi.com>
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void
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test_04()
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{
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signal(SIGPIPE, SIG_IGN);
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if (0 != mkfifo("xxx", S_IRWXU))
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{
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std::cerr << "failed to creat fifo" << std::endl;
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exit(-1);
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}
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int fval = fork();
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if (fval == -1)
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{
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std::cerr << "failed to fork" << std::endl;
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unlink("xxx");
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exit(-1);
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}
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else if (fval == 0)
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{
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std::ifstream ifs("xxx");
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sleep(1);
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ifs.close();
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exit(0);
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}
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std::ofstream ofs("xxx");
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sleep(2);
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ofs.put('t');
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/*
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* ISO/IED 14882:1998(E) 27.8.1.10.4
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*
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* void close();
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*
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* Effects: Calls rdbuf()->close() and, if that function fails
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* (returns a null pointer), calls setstate(failbit)...
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*/
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ofs.close();
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if (!(ofs.rdstate() & std::ios::failbit))
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{
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std::cerr << "fail bit was not set!" << std::endl;
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unlink("xxx");
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exit(-1);
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}
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unlink("xxx");
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exit(0);
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}
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// Charles Leggett <CGLeggett@lbl.gov>
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void test_05()
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{
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bool test = true;
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std::fstream scratch_file;
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scratch_file.open("SCRATCH", std::ios::out);
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scratch_file.close();
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scratch_file.open("SCRATCH", std::ios::in);
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scratch_file.close();
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VERIFY(scratch_file);
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}
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int
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main()
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{
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test_01();
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test_02();
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test_03();
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test_04();
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test_05();
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return 0;
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}
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