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/* Tests of areadlink and friends.
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Copyright (C) 2009-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Eric Blake <ebb9@byu.net>, 2009. */
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/* This file is designed to test areadlink(a),
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areadlink_with_size(a,b), and areadlinkat(AT_FDCWD,a). FUNC is the
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function to test; a length is always supplied, but may be ignored.
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Assumes that BASE and ASSERT are already defined, and that
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appropriate headers are already included. If PRINT, warn before
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skipping symlink tests with status 77. */
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static int
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test_areadlink (char * (*func) (char const *, size_t), bool print)
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{
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/* Sanity checks of failures. Mingw lacks symlink, but areadlink can
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still distinguish between various errors. */
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errno = 0;
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ASSERT (func ("no_such", 1) == NULL);
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ASSERT (errno == ENOENT);
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errno = 0;
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ASSERT (func ("no_such/", 1) == NULL);
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ASSERT (errno == ENOENT);
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errno = 0;
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ASSERT (func ("", 1) == NULL);
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ASSERT (errno == ENOENT || errno == EINVAL);
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errno = 0;
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ASSERT (func (".", 1) == NULL);
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ASSERT (errno == EINVAL);
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errno = 0;
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ASSERT (func ("./", 1) == NULL);
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ASSERT (errno == EINVAL);
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ASSERT (close (creat (BASE "file", 0600)) == 0);
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errno = 0;
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ASSERT (func (BASE "file", 1) == NULL);
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ASSERT (errno == EINVAL);
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errno = 0;
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ASSERT (func (BASE "file/", 1) == NULL);
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ASSERT (errno == ENOTDIR || errno == EINVAL); /* AIX yields EINVAL */
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ASSERT (unlink (BASE "file") == 0);
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/* Now test actual symlinks. */
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if (symlink (BASE "dir", BASE "link"))
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{
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if (print)
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fputs ("skipping test: symlinks not supported on this file system\n",
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stderr);
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return 77;
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}
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ASSERT (mkdir (BASE "dir", 0700) == 0);
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errno = 0;
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ASSERT (func (BASE "link/", 1) == NULL);
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ASSERT (errno == EINVAL);
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{
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/* Too small a guess is okay. */
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char *buf = func (BASE "link", 1);
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ASSERT (buf);
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ASSERT (strcmp (buf, BASE "dir") == 0);
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free (buf);
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/* Too large a guess is okay. */
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buf = func (BASE "link", 10000000);
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ASSERT (buf);
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ASSERT (strcmp (buf, BASE "dir") == 0);
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free (buf);
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}
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ASSERT (rmdir (BASE "dir") == 0);
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ASSERT (unlink (BASE "link") == 0);
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return 0;
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}
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