EXTRA_DIST += $(js_installed_tests)
endif
-test_ltlibraries = libreaddir-rand.la
-libreaddir_rand_la_SOURCES = tests/readdir-rand.c
-libreaddir_rand_la_CFLAGS = $(AM_CFLAGS) $(OT_INTERNAL_GIO_UNIX_CFLAGS)
-libreaddir_rand_la_LIBADD = \
- -ldl \
- $(OT_INTERNAL_GIO_UNIX_LIBS) \
- $(NULL)
-libreaddir_rand_la_LDFLAGS = $(AM_LDFLAGS) -avoid-version
-if !ENABLE_INSTALLED_TESTS
-libreaddir_rand_la_LDFLAGS += -rpath $(abs_builddir)
-endif
-
_installed_or_uninstalled_test_programs = tests/test-varint tests/test-ot-unix-utils tests/test-bsdiff tests/test-mutable-tree \
tests/test-keyfile-utils tests/test-ot-opt-utils tests/test-ot-tool-util \
tests/test-checksum tests/test-lzma tests/test-rollsum \
tests/libtest.sh \
$(NULL)
-tests/libreaddir-rand.so: Makefile
- mkdir -p tests/
- $(AM_V_GEN) ln -fns ../.libs/libreaddir-rand.so tests/
-ALL_LOCAL_RULES += tests/libreaddir-rand.so
-CLEANFILES += tests/libreaddir-rand.so tests/ostree-symlink-stamp \
+CLEANFILES += tests/ostree-symlink-stamp \
tests/ostree-prepare-root-symlink-stamp tests/ostree-remount-symlink-stamp \
tests/rofiles-fuse-symlink-stamp tests/ostree
CLEANFILES += tests/ostree-prepare-root tests/ostree-remount tests/rofiles-fuse
+++ /dev/null
-/*
- * Copyright (C) 2015 Colin Walters <walters@verbum.org>.
- *
- * SPDX-License-Identifier: LGPL-2.0+
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 library. If not, see <https://www.gnu.org/licenses/>.
- */
-
-#include "config.h"
-
-#include <dirent.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <dlfcn.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <sys/stat.h>
-#include <glib.h>
-
-/* Glibc uses readdir64 when _FILE_OFFSET_BITS == 64 as set by
- * AC_SYS_LARGEFILE on 32 bit systems.
- */
-#if defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
-# define READDIR "readdir64"
-# define READDIR_R "readdir64_r"
-#else
-# define READDIR "readdir"
-# define READDIR_R "readdir_r"
-#endif
-
-/*
- * copy_dirent:
- * @other: Another struct dirent
- *
- * Returns: a copy of @other. Free with g_free().
- */
-static struct dirent *
-copy_dirent (const struct dirent *other)
-{
- struct dirent *self;
- size_t len;
-
- /* We can't just use sizeof (struct dirent) for the length to copy,
- * because filenames are allowed to be longer than NAME_MAX bytes. */
- len = G_STRUCT_OFFSET (struct dirent, d_name) + strlen (other->d_name) + 1;
-
- if (len < other->d_reclen)
- len = other->d_reclen;
-
- if (len < sizeof (struct dirent))
- len = sizeof (struct dirent);
-
- self = g_malloc0 (len);
- memcpy (self, other, len);
- return self;
-}
-
-static GHashTable *direntcache;
-static GMutex direntcache_lock;
-static gsize initialized;
-
-typedef struct {
- GPtrArray *entries;
- guint offset;
-} DirEntries;
-
-static void
-dir_entries_free (gpointer data)
-{
- DirEntries *d = data;
- g_ptr_array_unref (d->entries);
- g_free (d);
-}
-
-static DirEntries *
-dir_entries_new (void)
-{
- DirEntries *d = g_new0 (DirEntries, 1);
- d->entries = g_ptr_array_new_with_free_func (g_free);
- return d;
-}
-
-static void
-ensure_initialized (void)
-{
- if (g_once_init_enter (&initialized))
- {
- direntcache = g_hash_table_new_full (NULL, NULL, NULL, dir_entries_free);
- g_mutex_init (&direntcache_lock);
- g_once_init_leave (&initialized, 1);
- }
-}
-
-struct dirent *
-readdir (DIR *dirp)
-{
- struct dirent *(*real_readdir)(DIR *dirp) = dlsym (RTLD_NEXT, READDIR);
- struct dirent *ret;
- gboolean cache_another = TRUE;
-
- ensure_initialized ();
-
- /* The core idea here is that each time through the loop, we read a
- * directory entry. If there is one, we choose whether to cache it
- * or to return it. Because multiple entries can be cached,
- * ordering is randomized. Statistically, the order will still be
- * *weighted* towards the ordering returned from the
- * kernel/filesystem, but the goal here is just to provide some
- * randomness in order to trigger bugs, not to be perfectly random.
- */
- while (cache_another)
- {
- DirEntries *de;
-
- errno = 0;
- ret = real_readdir (dirp);
- if (ret == NULL && errno != 0)
- goto out;
-
- g_mutex_lock (&direntcache_lock);
- de = g_hash_table_lookup (direntcache, dirp);
- if (ret)
- {
- if (g_random_boolean ())
- {
- struct dirent *copy;
- if (!de)
- {
- de = dir_entries_new ();
- g_hash_table_insert (direntcache, dirp, de);
- }
- copy = copy_dirent (ret);
- g_ptr_array_add (de->entries, copy);
- }
- else
- {
- cache_another = FALSE;
- }
- }
- else
- {
- if (de && de->offset < de->entries->len)
- {
- ret = de->entries->pdata[de->offset];
- de->offset++;
- }
- cache_another = FALSE;
- }
- g_mutex_unlock (&direntcache_lock);
- }
-
- out:
- return ret;
-}
-
-int
-closedir (DIR *dirp)
-{
- int (*real_closedir)(DIR *dirp) = dlsym (RTLD_NEXT, "closedir");
-
- ensure_initialized ();
-
- g_mutex_lock (&direntcache_lock);
- g_hash_table_remove (direntcache, dirp);
- g_mutex_unlock (&direntcache_lock);
-
- return real_closedir (dirp);
-}
-
-static void
-assert_no_cached_entries (DIR *dirp)
-{
- DirEntries *de;
- g_mutex_lock (&direntcache_lock);
- de = g_hash_table_lookup (direntcache, dirp);
- g_assert (!de || de->entries->len == 0);
- g_mutex_unlock (&direntcache_lock);
-}
-
-void
-seekdir (DIR *dirp, long loc)
-{
- void (*real_seekdir)(DIR *dirp, long loc) = dlsym (RTLD_NEXT, "seekdir");
-
- ensure_initialized ();
-
- /* For now, crash if seekdir is called when we have cached entries.
- * If some app wants to use this and seekdir() we can implement it.
- */
- assert_no_cached_entries (dirp);
-
- real_seekdir (dirp, loc);
-}
-
-void
-rewinddir (DIR *dirp)
-{
- void (*real_rewinddir)(DIR *dirp) = dlsym (RTLD_NEXT, "rewinddir");
-
- ensure_initialized ();
-
- /* Blow away the cache */
- g_mutex_lock (&direntcache_lock);
- g_hash_table_remove (direntcache, dirp);
- g_mutex_unlock (&direntcache_lock);
-
- real_rewinddir (dirp);
-}
-
-int
-readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result)
-{
- int (*real_readdir_r)(DIR *dirp, struct dirent *entry, struct dirent **result) = dlsym (RTLD_NEXT, READDIR_R);
-
- ensure_initialized ();
-
- /* For now, assert that no one is mixing readdir_r() with readdir().
- * It'd be broken to do so, and very few programs use readdir_r()
- * anyways. */
- assert_no_cached_entries (dirp);
-
- return real_readdir_r (dirp, entry, result);
-}
projects / ostree.git / commitdiff