rm_/lib/fdopen.c

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/* Open a stream with a given file descriptor.
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Copyright (C) 2011-2022 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdio.h>
#include <errno.h>
#if HAVE_MSVC_INVALID_PARAMETER_HANDLER
# include "msvc-inval.h"
#endif
#undef fdopen
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#if defined _WIN32 && !defined __CYGWIN__
# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
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static FILE *
fdopen_nothrow (int fd, const char *mode)
{
FILE *result;
TRY_MSVC_INVAL
{
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result = _fdopen (fd, mode);
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}
CATCH_MSVC_INVAL
{
result = NULL;
}
DONE_MSVC_INVAL;
return result;
}
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# else
# define fdopen_nothrow _fdopen
# endif
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#else
# define fdopen_nothrow fdopen
#endif
FILE *
rpl_fdopen (int fd, const char *mode)
{
int saved_errno = errno;
FILE *fp;
errno = 0;
fp = fdopen_nothrow (fd, mode);
if (fp == NULL)
{
if (errno == 0)
errno = EBADF;
}
else
errno = saved_errno;
return fp;
}