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/* Open an nss_files database file.
Copyright (C) 2020-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <nss_files.h>
#include <errno.h>
#include <stdio_ext.h>
FILE *
__nss_files_fopen (const char *path)
{
FILE *fp = fopen (path, "rce");
if (fp == NULL)
return NULL;
/* The stream is not shared across threads. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
/* This tells libio that the file is seekable, and that fp->_offset
is correct, ensuring that __ftello64 is efficient (bug 26257). */
if (__fseeko64 (fp, 0, SEEK_SET) < 0)
{
/* nss_files requires seekable files, to deal with repeated
reads of the same line after reporting ERANGE. */
fclose (fp);
__set_errno (ESPIPE);
return NULL;
}
return fp;
}
libc_hidden_def (__nss_files_fopen)
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