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/*
* Copyright © Canonical Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dlfcn.h>
#include <unistd.h>
#include <iostream>
#include <cstdlib>
int close(int fd)
{
static int (*real_close)(int) = nullptr;
if (!real_close)
{
real_close = reinterpret_cast<int(*)(int)>(dlsym(RTLD_NEXT, "close"));
}
auto result = real_close(fd);
if (result == -1 && errno == EBADF)
{
std::cerr
<< "Detected attempt to close a bad file-descriptor.\n"
<< "This usually indicates a double-close bug.\n"
<< "The bad file descriptor was: " << fd << std::endl;
abort();
}
return result;
}
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