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-rw-r--r--gnulib-tests/test-canonicalize.c375
1 files changed, 375 insertions, 0 deletions
diff --git a/gnulib-tests/test-canonicalize.c b/gnulib-tests/test-canonicalize.c
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+/* Test of execution of file name canonicalization.
+ Copyright (C) 2007-2020 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
+
+/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
+ may "optimize" the null_ptr function, when its result gets passed to a
+ function that has an argument declared as _GL_ARG_NONNULL. */
+#define _GL_ARG_NONNULL(params)
+
+#include <config.h>
+
+#include "canonicalize.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "same-inode.h"
+#include "ignore-value.h"
+
+#if GNULIB_defined_canonicalize_file_name
+# include "null-ptr.h"
+#endif
+
+#include "macros.h"
+
+#define BASE "t-can.tmp"
+
+int
+main (void)
+{
+ /* Setup some hierarchy to be used by this test. Start by removing
+ any leftovers from a previous partial run. */
+ {
+ int fd;
+ ignore_value (system ("rm -rf " BASE " ise"));
+ ASSERT (mkdir (BASE, 0700) == 0);
+ fd = creat (BASE "/tra", 0600);
+ ASSERT (0 <= fd);
+ ASSERT (close (fd) == 0);
+ }
+
+ /* Check for ., .., intermediate // handling, and for error cases. */
+ {
+ char *result1 = canonicalize_file_name (BASE "//./..//" BASE "/tra");
+ char *result2 = canonicalize_filename_mode (BASE "//./..//" BASE "/tra",
+ CAN_EXISTING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (strcmp (result1, result2) == 0);
+ ASSERT (strstr (result1, "/" BASE "/tra")
+ == result1 + strlen (result1) - strlen ("/" BASE "/tra"));
+ free (result1);
+ free (result2);
+
+ errno = 0;
+ result1 = canonicalize_file_name ("");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOENT);
+
+ errno = 0;
+ result2 = canonicalize_filename_mode ("", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOENT);
+
+ /* This test works only if the canonicalize_file_name implementation
+ comes from gnulib. If it comes from libc, we have no way to prevent
+ gcc from "optimizing" the null_ptr function in invalid ways. See
+ <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93156>. */
+#if GNULIB_defined_canonicalize_file_name
+ errno = 0;
+ result1 = canonicalize_file_name (null_ptr ());
+ ASSERT (result1 == NULL);
+ ASSERT (errno == EINVAL);
+#endif
+
+ errno = 0;
+ result2 = canonicalize_filename_mode (NULL, CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == EINVAL);
+
+ errno = 0;
+ result2 = canonicalize_filename_mode (".", CAN_MISSING | CAN_ALL_BUT_LAST);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == EINVAL);
+ }
+
+ /* Check that a non-directory with trailing slash yields NULL. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name (BASE "/tra/");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOTDIR);
+ errno = 0;
+ result2 = canonicalize_filename_mode (BASE "/tra/", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOTDIR);
+ }
+
+ /* Check that a missing directory yields NULL. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name (BASE "/zzz/..");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ result2 = canonicalize_filename_mode (BASE "/zzz/..", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOENT);
+ }
+
+ /* From here on out, tests involve symlinks. */
+ if (symlink (BASE "/ket", "ise") != 0)
+ {
+ ASSERT (remove (BASE "/tra") == 0);
+ ASSERT (rmdir (BASE) == 0);
+ fputs ("skipping test: symlinks not supported on this file system\n",
+ stderr);
+ return 77;
+ }
+ ASSERT (symlink ("bef", BASE "/plo") == 0);
+ ASSERT (symlink ("tra", BASE "/huk") == 0);
+ ASSERT (symlink ("lum", BASE "/bef") == 0);
+ ASSERT (symlink ("wum", BASE "/ouk") == 0);
+ ASSERT (symlink ("../ise", BASE "/ket") == 0);
+ ASSERT (mkdir (BASE "/lum", 0700) == 0);
+ ASSERT (symlink ("s", BASE "/p") == 0);
+ ASSERT (symlink ("d", BASE "/s") == 0);
+ ASSERT (mkdir (BASE "/d", 0700) == 0);
+ ASSERT (close (creat (BASE "/d/2", 0600)) == 0);
+ ASSERT (symlink ("../s/2", BASE "/d/1") == 0);
+ ASSERT (symlink ("//.//../..", BASE "/droot") == 0);
+
+ /* Check that symbolic links are not resolved, with CAN_NOLINKS. */
+ {
+ char *result1 = canonicalize_filename_mode (BASE "/huk", CAN_NOLINKS);
+ ASSERT (result1 != NULL);
+ ASSERT (strcmp (result1 + strlen (result1) - strlen ("/" BASE "/huk"),
+ "/" BASE "/huk") == 0);
+ free (result1);
+ }
+
+ /* Check that the symbolic link to a file can be resolved. */
+ {
+ char *result1 = canonicalize_file_name (BASE "/huk");
+ char *result2 = canonicalize_file_name (BASE "/tra");
+ char *result3 = canonicalize_filename_mode (BASE "/huk", CAN_EXISTING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (result3 != NULL);
+ ASSERT (strcmp (result1, result2) == 0);
+ ASSERT (strcmp (result2, result3) == 0);
+ ASSERT (strcmp (result1 + strlen (result1) - strlen ("/" BASE "/tra"),
+ "/" BASE "/tra") == 0);
+ free (result1);
+ free (result2);
+ free (result3);
+ }
+
+ /* Check that the symbolic link to a directory can be resolved. */
+ {
+ char *result1 = canonicalize_file_name (BASE "/plo");
+ char *result2 = canonicalize_file_name (BASE "/bef");
+ char *result3 = canonicalize_file_name (BASE "/lum");
+ char *result4 = canonicalize_filename_mode (BASE "/plo", CAN_EXISTING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (result3 != NULL);
+ ASSERT (result4 != NULL);
+ ASSERT (strcmp (result1, result2) == 0);
+ ASSERT (strcmp (result2, result3) == 0);
+ ASSERT (strcmp (result3, result4) == 0);
+ ASSERT (strcmp (result1 + strlen (result1) - strlen ("/" BASE "/lum"),
+ "/" BASE "/lum") == 0);
+ free (result1);
+ free (result2);
+ free (result3);
+ free (result4);
+ }
+
+ /* Check that a symbolic link to a nonexistent file yields NULL. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name (BASE "/ouk");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ result2 = canonicalize_filename_mode (BASE "/ouk", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOENT);
+ }
+
+ /* Check that a non-directory symlink with trailing slash yields NULL. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name (BASE "/huk/");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOTDIR);
+ errno = 0;
+ result2 = canonicalize_filename_mode (BASE "/huk/", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOTDIR);
+ }
+
+ /* Check that a missing directory via symlink yields NULL. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name (BASE "/ouk/..");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ result2 = canonicalize_filename_mode (BASE "/ouk/..", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ENOENT);
+ }
+
+ /* Check that a loop of symbolic links is detected. */
+ {
+ char *result1;
+ char *result2;
+ errno = 0;
+ result1 = canonicalize_file_name ("ise");
+ ASSERT (result1 == NULL);
+ ASSERT (errno == ELOOP);
+ errno = 0;
+ result2 = canonicalize_filename_mode ("ise", CAN_EXISTING);
+ ASSERT (result2 == NULL);
+ ASSERT (errno == ELOOP);
+ }
+
+ /* Check that alternate modes can resolve missing basenames. */
+ {
+ char *result1 = canonicalize_filename_mode (BASE "/zzz", CAN_ALL_BUT_LAST);
+ char *result2 = canonicalize_filename_mode (BASE "/zzz", CAN_MISSING);
+ char *result3 = canonicalize_filename_mode (BASE "/zzz/", CAN_ALL_BUT_LAST);
+ char *result4 = canonicalize_filename_mode (BASE "/zzz/", CAN_MISSING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (result3 != NULL);
+ ASSERT (result4 != NULL);
+ ASSERT (strcmp (result1, result2) == 0);
+ ASSERT (strcmp (result2, result3) == 0);
+ ASSERT (strcmp (result3, result4) == 0);
+ ASSERT (strcmp (result1 + strlen (result1) - strlen ("/" BASE "/zzz"),
+ "/" BASE "/zzz") == 0);
+ free (result1);
+ free (result2);
+ free (result3);
+ free (result4);
+ }
+
+ /* Check that alternate modes can resolve broken symlink basenames. */
+ {
+ char *result1 = canonicalize_filename_mode (BASE "/ouk", CAN_ALL_BUT_LAST);
+ char *result2 = canonicalize_filename_mode (BASE "/ouk", CAN_MISSING);
+ char *result3 = canonicalize_filename_mode (BASE "/ouk/", CAN_ALL_BUT_LAST);
+ char *result4 = canonicalize_filename_mode (BASE "/ouk/", CAN_MISSING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (result3 != NULL);
+ ASSERT (result4 != NULL);
+ ASSERT (strcmp (result1, result2) == 0);
+ ASSERT (strcmp (result2, result3) == 0);
+ ASSERT (strcmp (result3, result4) == 0);
+ ASSERT (strcmp (result1 + strlen (result1) - strlen ("/" BASE "/wum"),
+ "/" BASE "/wum") == 0);
+ free (result1);
+ free (result2);
+ free (result3);
+ free (result4);
+ }
+
+ /* Check that alternate modes can handle missing dirnames. */
+ {
+ char *result1 = canonicalize_filename_mode ("t-can.zzz/zzz", CAN_ALL_BUT_LAST);
+ char *result2 = canonicalize_filename_mode ("t-can.zzz/zzz", CAN_MISSING);
+ ASSERT (result1 == NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (strcmp (result2 + strlen (result2) - 14, "/t-can.zzz/zzz") == 0);
+ free (result2);
+ }
+
+ /* Ensure that the following is resolved properly.
+ Before 2007-09-27, it would mistakenly report a loop. */
+ {
+ char *result1 = canonicalize_filename_mode (BASE, CAN_EXISTING);
+ char *result2 = canonicalize_filename_mode (BASE "/p/1", CAN_EXISTING);
+ ASSERT (result1 != NULL);
+ ASSERT (result2 != NULL);
+ ASSERT (strcmp (result2 + strlen (result1), "/d/2") == 0);
+ free (result1);
+ free (result2);
+ }
+
+ /* Check that leading // is honored correctly. */
+ {
+ struct stat st1;
+ struct stat st2;
+ char *result1 = canonicalize_file_name ("//.");
+ char *result2 = canonicalize_filename_mode ("//.", CAN_EXISTING);
+ char *result3 = canonicalize_file_name (BASE "/droot");
+ char *result4 = canonicalize_filename_mode (BASE "/droot", CAN_EXISTING);
+ ASSERT (result1);
+ ASSERT (result2);
+ ASSERT (result3);
+ ASSERT (result4);
+ ASSERT (stat ("/", &st1) == 0);
+ ASSERT (stat ("//", &st2) == 0);
+ if (SAME_INODE (st1, st2))
+ {
+ ASSERT (strcmp (result1, "/") == 0);
+ ASSERT (strcmp (result2, "/") == 0);
+ ASSERT (strcmp (result3, "/") == 0);
+ ASSERT (strcmp (result4, "/") == 0);
+ }
+ else
+ {
+ ASSERT (strcmp (result1, "//") == 0);
+ ASSERT (strcmp (result2, "//") == 0);
+ ASSERT (strcmp (result3, "//") == 0);
+ ASSERT (strcmp (result4, "//") == 0);
+ }
+ free (result1);
+ free (result2);
+ free (result3);
+ free (result4);
+ }
+
+ /* Cleanup. */
+ ASSERT (remove (BASE "/droot") == 0);
+ ASSERT (remove (BASE "/d/1") == 0);
+ ASSERT (remove (BASE "/d/2") == 0);
+ ASSERT (remove (BASE "/d") == 0);
+ ASSERT (remove (BASE "/s") == 0);
+ ASSERT (remove (BASE "/p") == 0);
+ ASSERT (remove (BASE "/plo") == 0);
+ ASSERT (remove (BASE "/huk") == 0);
+ ASSERT (remove (BASE "/bef") == 0);
+ ASSERT (remove (BASE "/ouk") == 0);
+ ASSERT (remove (BASE "/ket") == 0);
+ ASSERT (remove (BASE "/lum") == 0);
+ ASSERT (remove (BASE "/tra") == 0);
+ ASSERT (remove (BASE) == 0);
+ ASSERT (remove ("ise") == 0);
+
+ return 0;
+}
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