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/* Test the access rights of a file.
Copyright (C) 2019-2024 Free Software Foundation, Inc.
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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#if defined _WIN32 && !defined __CYGWIN__
# include <io.h>
#endif
int
access (const char *file, int mode)
#undef access
{
int ret;
#if defined _WIN32 && !defined __CYGWIN__
if ((mode & X_OK) != 0)
mode = (mode & ~X_OK) | R_OK;
ret = _access (file, mode);
#else
ret = access (file, mode);
#endif
#if (defined _WIN32 && !defined __CYGWIN__) || ACCESS_TRAILING_SLASH_BUG
# if defined _WIN32 && !defined __CYGWIN__
if (ret == 0 || errno == EINVAL)
# else
if (ret == 0)
# endif
{
size_t file_len = strlen (file);
if (file_len > 0 && file[file_len - 1] == '/')
{
struct stat st;
if (stat (file, &st) == 0)
{
if (! S_ISDIR (st.st_mode))
{
errno = ENOTDIR;
return -1;
}
}
else
return (mode == F_OK && errno == EOVERFLOW ? 0 : -1);
}
}
#endif
return ret;
}
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