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gst/gstregistrybinary.c: Don't use g_mkstmp() on win32, it's unsafe if glib is using a different libc.
Original commit message from CVS: * gst/gstregistrybinary.c: Don't use g_mkstmp() on win32, it's unsafe if glib is using a different libc. Fixes #544776.
This commit is contained in:
Michael Smith
parent
6b16636203
commit
945bf1bdd3
2 changed files with 187 additions and 69 deletions
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@ -1,3 +1,10 @@
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2008-08-11 Michael Smith <msmith@songbirdnest.com>
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* gst/gstregistrybinary.c:
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Don't use g_mkstmp() on win32, it's unsafe if glib is using a different
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libc.
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Fixes #544776.
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2008-08-11 Edward Hervey <edward.hervey@collabora.co.uk>
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* libs/gst/base/gstbasetransform.c:
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@ -215,15 +215,169 @@ _gst_crc32 (guint32 crc, const gchar * buf, guint len)
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/* Registry saving */
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#ifdef G_OS_WIN32
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/* On win32, we can't use g_mkstmp(), because of cross-DLL file I/O problems.
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* So, we just create the entire binary registry in memory, then write it out
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* with g_file_set_contents(), which creates a temporary file internally
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*/
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typedef struct BinaryRegistryCache
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{
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const char *location;
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guint8 *mem;
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gssize len;
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} BinaryRegistryCache;
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static BinaryRegistryCache *
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gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
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{
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BinaryRegistryCache *cache = g_new0 (BinaryRegistryCache, 1);
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cache->location = location;
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return cache;
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}
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static int
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gst_registry_binary_cache_write (GstRegistry * registry,
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BinaryRegistryCache * cache, unsigned long offset,
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const void *data, int length)
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{
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cache->len = MAX (offset + length, cache->len);
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cache->mem = g_realloc (cache->mem, cache->len);
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memcpy (cache->mem + offset, data, length);
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return length;
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}
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static gboolean
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gst_registry_binary_cache_finish (GstRegistry * registry,
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BinaryRegistryCache * cache, gboolean success)
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{
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gboolean ret = TRUE;
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GError *error = NULL;
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if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
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cache->len, &error)) {
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GST_ERROR ("Failed to write to cache file: %s", error->message);
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g_error_free (error);
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ret = FALSE;
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}
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g_free (cache->mem);
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g_free (cache);
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return ret;
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}
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#else
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typedef struct BinaryRegistryCache
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{
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const char *location;
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char *tmp_location;
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unsigned long currentoffset;
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} BinaryRegistryCache;
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static BinaryRegistryCache *
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gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
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{
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BinaryRegistryCache *cache = g_new0 (BinaryRegistryCache, 1);
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cache->location = location;
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cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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registry->cache_file = g_mkstemp (cache->tmp_location);
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if (registry->cache_file == -1) {
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gchar *dir;
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/* oops, I bet the directory doesn't exist */
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dir = g_path_get_dirname (location);
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g_mkdir_with_parents (dir, 0777);
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g_free (dir);
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/* the previous g_mkstemp call overwrote the XXXXXX placeholder ... */
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g_free (cache->tmp_location);
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cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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registry->cache_file = g_mkstemp (cache->tmp_location);
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if (registry->cache_file == -1) {
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GST_DEBUG ("g_mkstemp() failed: %s", g_strerror (errno));
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g_free (cache->tmp_location);
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g_free (cache);
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return NULL;
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}
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}
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return cache;
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}
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static int
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gst_registry_binary_cache_write (GstRegistry * registry,
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BinaryRegistryCache * cache, unsigned long offset,
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const void *data, int length)
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{
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long written;
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if (offset != cache->currentoffset) {
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if (lseek (registry->cache_file, offset, SEEK_SET) != 0) {
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GST_ERROR ("Seeking to new offset failed");
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return FALSE;
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}
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cache->currentoffset = offset;
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}
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written = write (registry->cache_file, data, length);
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if (written != length) {
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GST_ERROR ("Failed to write to cache file");
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}
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cache->currentoffset += written;
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return written;
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}
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static gboolean
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gst_registry_binary_cache_finish (GstRegistry * registry,
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BinaryRegistryCache * cache, gboolean success)
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{
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if (close (registry->cache_file) < 0)
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goto close_failed;
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if (success) {
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/* Only do the rename if we wrote the entire file successfully */
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if (g_rename (cache->tmp_location, cache->location) < 0)
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goto rename_failed;
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}
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g_free (cache->tmp_location);
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g_free (cache);
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GST_INFO ("Wrote binary registry cache");
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return TRUE;
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fail_after_close:
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{
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g_remove (cache->tmp_location);
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g_free (cache->tmp_location);
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g_free (cache);
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return FALSE;
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}
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close_failed:
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{
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GST_ERROR ("close() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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rename_failed:
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{
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GST_ERROR ("g_rename() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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}
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#endif
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/*
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* gst_registry_binary_write:
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* gst_registry_binary_write_chunk:
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*
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* Write from a memory location to the registry cache file
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*
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* Returns: %TRUE for success
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*/
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inline static gboolean
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gst_registry_binary_write (GstRegistry * registry, const void *mem,
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gst_registry_binary_write_chunk (GstRegistry * registry,
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BinaryRegistryCache * cache, const void *mem,
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const gssize size, unsigned long *file_position, gboolean align,
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guint32 * crc32)
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{
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@ -233,23 +387,26 @@ gst_registry_binary_write (GstRegistry * registry, const void *mem,
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/* Padding to insert the struct that requiere word alignment */
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if ((align) && (alignment (*file_position) != 0)) {
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padsize = ALIGNMENT - alignment (*file_position);
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if (write (registry->cache_file, padder, padsize) != padsize) {
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if (gst_registry_binary_cache_write (registry, cache, *file_position,
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padder, padsize) != padsize) {
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GST_ERROR ("Failed to write binary registry padder");
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return FALSE;
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}
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if (padsize > 0)
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*crc32 = _gst_crc32 (*crc32, padder, padsize);
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*file_position = *file_position + padsize;
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*file_position += padsize;
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}
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if (write (registry->cache_file, mem, size) != size) {
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if (gst_registry_binary_cache_write (registry, cache, *file_position,
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mem, size) != size) {
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GST_ERROR ("Failed to write binary registry element");
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return FALSE;
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}
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if (size > 0)
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*crc32 = _gst_crc32 (*crc32, mem, size);
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*file_position = *file_position + size;
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*file_position += size;
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return TRUE;
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}
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@ -575,7 +732,6 @@ fail:
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return FALSE;
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}
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/**
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* gst_registry_binary_write_cache:
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* @registry: a #GstRegistry
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@ -589,35 +745,14 @@ gboolean
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gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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{
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GList *walk;
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gchar *tmp_location;
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GstBinaryRegistryMagic magic;
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GList *to_write = NULL;
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unsigned long file_position = 0;
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BinaryRegistryCache *cache;
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GST_INFO ("Building binary registry cache image");
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g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
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tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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registry->cache_file = g_mkstemp (tmp_location);
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if (registry->cache_file == -1) {
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gchar *dir;
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/* oops, I bet the directory doesn't exist */
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dir = g_path_get_dirname (location);
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g_mkdir_with_parents (dir, 0777);
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g_free (dir);
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/* the previous g_mkstemp call overwrote the XXXXXX placeholder ... */
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g_free (tmp_location);
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tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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registry->cache_file = g_mkstemp (tmp_location);
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if (registry->cache_file == -1) {
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GST_DEBUG ("g_mkstemp() failed: %s", g_strerror (errno));
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g_free (tmp_location);
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return FALSE;
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}
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}
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if (!gst_registry_binary_initialize_magic (&magic))
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goto fail;
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@ -648,9 +783,14 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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GST_INFO ("Writing binary registry cache");
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cache = gst_registry_binary_cache_init (registry, location);
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if (!cache)
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goto fail_free_list;
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/* write magic */
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if (write (registry->cache_file, &magic,
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sizeof (GstBinaryRegistryMagic)) != sizeof (GstBinaryRegistryMagic)) {
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if (gst_registry_binary_cache_write (registry, cache, file_position,
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&magic, sizeof (GstBinaryRegistryMagic)) !=
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sizeof (GstBinaryRegistryMagic)) {
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GST_ERROR ("Failed to write binary registry magic");
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goto fail_free_list;
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}
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@ -660,7 +800,7 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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for (walk = to_write; walk; walk = g_list_next (walk)) {
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GstBinaryChunk *cur = walk->data;
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if (!gst_registry_binary_write (registry, cur->data, cur->size,
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if (!gst_registry_binary_write_chunk (registry, cache, cur->data, cur->size,
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&file_position, cur->align, &magic.crc32)) {
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if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
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g_free (cur->data);
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@ -675,29 +815,15 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
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}
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g_list_free (to_write);
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if (lseek (registry->cache_file, 0, SEEK_SET) != 0) {
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GST_ERROR ("Seeking to rewrite the binary registry CRC32 failed");
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} else {
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if (write (registry->cache_file, &magic,
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sizeof (GstBinaryRegistryMagic)) != sizeof (GstBinaryRegistryMagic))
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if (gst_registry_binary_cache_write (registry, cache, 0, &magic,
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sizeof (GstBinaryRegistryMagic)) != sizeof (GstBinaryRegistryMagic)) {
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GST_ERROR ("Failed to rewrite binary registry magic");
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return FALSE;
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}
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if (close (registry->cache_file) < 0)
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goto close_failed;
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if (!gst_registry_binary_cache_finish (registry, cache, TRUE))
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return FALSE;
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if (g_file_test (tmp_location, G_FILE_TEST_EXISTS)) {
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#ifdef WIN32
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g_remove (location);
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#endif
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if (g_rename (tmp_location, location) < 0)
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goto rename_failed;
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} else {
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/* FIXME: shouldn't we return FALSE here? */
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}
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g_free (tmp_location);
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GST_INFO ("Wrote binary registry cache");
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return TRUE;
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/* Errors */
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@ -711,29 +837,14 @@ fail_free_list:
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g_free (cur);
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}
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g_list_free (to_write);
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(void) gst_registry_binary_cache_finish (registry, cache, FALSE);
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/* fall through */
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}
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fail:
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{
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(void) close (registry->cache_file);
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/* fall through */
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}
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fail_after_close:
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{
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g_remove (tmp_location);
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g_free (tmp_location);
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return FALSE;
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}
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close_failed:
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{
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GST_ERROR ("close() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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rename_failed:
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{
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GST_ERROR ("g_rename() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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}
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