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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* Copyright (C) 2005-2020 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 <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <kernel-features.h>
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/* Open FILE with access OFLAG. Interpret relative paths relative to
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the directory associated with FD. If O_CREAT or O_TMPFILE is in OFLAG, a
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third argument is the file protection. */
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int
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__openat (int fd, const char *file, int oflag, ...)
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{
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int mode;
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if (file == NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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if (fd != AT_FDCWD && file[0] != '/')
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{
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/* Check FD is associated with a directory. */
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struct stat64 st;
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if (__fxstat64 (_STAT_VER, fd, &st) != 0)
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return -1;
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if (!S_ISDIR (st.st_mode))
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{
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__set_errno (ENOTDIR);
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return -1;
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}
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}
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if (__OPEN_NEEDS_MODE (oflag))
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{
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va_list arg;
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va_start (arg, oflag);
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mode = va_arg (arg, int);
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va_end (arg);
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ignore_value (mode);
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}
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__set_errno (ENOSYS);
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return -1;
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}
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libc_hidden_def (__openat)
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weak_alias (__openat, openat)
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stub_warning (openat)
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/* __openat_2 is a generic wrapper that calls __openat.
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So give a stub warning for that symbol too. */
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stub_warning (__openat_2)
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