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48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Open an nss_files database file.
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Copyright (C) 2020-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <nss_files.h>
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#include <errno.h>
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#include <stdio_ext.h>
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FILE *
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__nss_files_fopen (const char *path)
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{
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FILE *fp = fopen (path, "rce");
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if (fp == NULL)
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return NULL;
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/* The stream is not shared across threads. */
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__fsetlocking (fp, FSETLOCKING_BYCALLER);
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/* This tells libio that the file is seekable, and that fp->_offset
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is correct, ensuring that __ftello64 is efficient (bug 26257). */
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if (__fseeko64 (fp, 0, SEEK_SET) < 0)
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{
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/* nss_files requires seekable files, to deal with repeated
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reads of the same line after reporting ERANGE. */
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fclose (fp);
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__set_errno (ESPIPE);
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return NULL;
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}
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return fp;
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}
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libc_hidden_def (__nss_files_fopen)
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