139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/* Test glob danglin symlink match (BZ #866).
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Copyright (C) 2017-2019 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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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <limits.h>
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#include <stddef.h>
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#include <glob.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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static void do_prepare (int argc, char *argv[]);
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#define PREPARE do_prepare
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static int do_test (void);
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#include <support/test-driver.c>
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/* Maximum number of symlink calls for create_link function. */
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#define MAX_CREATE_LINK_TRIES 10
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static void
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create_link (const char *base, const char *fname, char *linkname,
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size_t linknamesize)
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{
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int ntries = 0;
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while (1)
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{
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snprintf (linkname, linknamesize, "%s/%s%02d", test_dir, base,
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ntries);
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if (symlink (fname, linkname) == 0)
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break;
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if (errno != EEXIST)
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FAIL_EXIT1 ("symlink failed: %m");
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if (ntries++ == MAX_CREATE_LINK_TRIES)
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FAIL_EXIT1 ("symlink failed with EEXIST too many times");
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}
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add_temp_file (linkname);
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}
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#ifndef PATH_MAX
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# define PATH_MAX 1024
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#endif
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static char valid_link[PATH_MAX];
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static char dangling_link[PATH_MAX];
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static char dangling_dir[PATH_MAX];
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static void
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do_prepare (int argc, char *argv[])
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{
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char *fname;
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create_temp_file ("tst-glob_symlinks.", &fname);
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/* Create an existing symlink. */
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create_link ("valid-symlink-tst-glob_symlinks", fname, valid_link,
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sizeof valid_link);
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/* Create a dangling symlink to a file. */
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int fd = create_temp_file ("dangling-tst-glob_file", &fname);
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TEST_VERIFY_EXIT (close (fd) == 0);
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/* It throws a warning at process end due 'add_temp_file' trying to
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unlink it again. */
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TEST_VERIFY_EXIT (unlink (fname) == 0);
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create_link ("dangling-symlink-file-tst-glob", fname, dangling_link,
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sizeof dangling_link);
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/* Create a dangling symlink to a directory. */
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char tmpdir[PATH_MAX];
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snprintf (tmpdir, sizeof tmpdir, "%s/dangling-tst-glob_folder.XXXXXX",
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test_dir);
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TEST_VERIFY_EXIT (mkdtemp (tmpdir) != NULL);
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create_link ("dangling-symlink-dir-tst-glob", tmpdir, dangling_dir,
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sizeof dangling_dir);
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TEST_VERIFY_EXIT (rmdir (tmpdir) == 0);
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}
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static int
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do_test (void)
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{
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char buf[PATH_MAX + 1];
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glob_t gl;
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TEST_VERIFY_EXIT (glob (valid_link, 0, NULL, &gl) == 0);
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TEST_VERIFY_EXIT (gl.gl_pathc == 1);
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TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], valid_link) == 0);
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globfree (&gl);
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TEST_VERIFY_EXIT (glob (dangling_link, 0, NULL, &gl) == 0);
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TEST_VERIFY_EXIT (gl.gl_pathc == 1);
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TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
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globfree (&gl);
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TEST_VERIFY_EXIT (glob (dangling_dir, 0, NULL, &gl) == 0);
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TEST_VERIFY_EXIT (gl.gl_pathc == 1);
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TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_dir) == 0);
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globfree (&gl);
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snprintf (buf, sizeof buf, "%s", dangling_link);
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buf[strlen(buf) - 1] = '?';
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TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0);
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TEST_VERIFY_EXIT (gl.gl_pathc == 1);
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TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
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globfree (&gl);
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/* glob should handle dangling symbol as normal file, so <file>? should
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return an empty string. */
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snprintf (buf, sizeof buf, "%s?", dangling_link);
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TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) != 0);
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globfree (&gl);
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snprintf (buf, sizeof buf, "%s*", dangling_link);
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TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0);
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TEST_VERIFY_EXIT (gl.gl_pathc == 1);
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TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
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globfree (&gl);
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return 0;
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}
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