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registrybinary: registry file mode via GST_REGISTRY_MODE

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In an embedded system where all services run as seperate users it is
useful to have the gstreamer registry readable by all so it can be
re-used, in similar manner as a host system where one user have seperate
applications running but all share same registry.

To make this possible introducing GST_REGISTRY_MODE for adjusting the
changing mode of the registry binary when finishing up with the
temporary file (which has restricted access).

Fixes: #692
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/825>
This commit is contained in:
Robert Rosengren 2021-05-10 12:50:18 +02:00 committed by GStreamer Marge Bot
parent 0596da1966
commit 69b3b1d6bf
1 changed files with 17 additions and 0 deletions
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17
subprojects/gstreamer/gst/gstregistrybinary.c
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@ -252,6 +252,7 @@ static gboolean
gst_registry_binary_cache_finish (BinaryRegistryCache * cache, gboolean success)
{
gint fclose_ret;
const gchar *registry_mode;
if (success) {
/* flush the file and make sure the OS's buffer has been written to disk */
@ -292,6 +293,22 @@ gst_registry_binary_cache_finish (BinaryRegistryCache * cache, gboolean success)
if (g_rename (cache->tmp_location, cache->location) < 0)
goto rename_failed;
/* Change mode of registry if set in environment */
registry_mode = g_getenv ("GST_REGISTRY_MODE");
if (registry_mode) {
gchar *endptr;
gint64 mode;
/* Expect numeric mode as one to four octal digits */
mode = g_ascii_strtoll (registry_mode, &endptr, 8);
if (mode > G_MAXINT || *endptr != '\0')
GST_ERROR ("GST_REGISTRY_MODE not an integer value");
else if (g_chmod (cache->location, mode) < 0)
GST_ERROR ("g_chmod failed: %s", g_strerror (errno));
else
GST_INFO ("Changed mode of registry cache to %s", registry_mode);
}
g_free (cache->tmp_location);
g_slice_free (BinaryRegistryCache, cache);
GST_INFO ("Wrote binary registry cache");