Modify pa_state_path() to take an additional argument for prepending the machine id to the file name.

src/modules/module-default-device-restore.c

@@ -154,28 +154,16 @@ static void subscribe_cb(pa_core *c, pa_subscription_event_type_t t, uint32_t id
 
 int pa__init(pa_module *m) {
     struct userdata *u;
-    char hn[256], *fn;
 
     pa_assert(m);
 
     m->userdata = u = pa_xnew0(struct userdata, 1);
     u->core = m->core;
 
-    if (!pa_get_host_name(hn, sizeof(hn)))
+    if (!(u->sink_filename = pa_state_path("default-sink", TRUE)))
         goto fail;
 
-    fn = pa_sprintf_malloc("default-sink.%s", hn);
+    if (!(u->source_filename = pa_state_path("default-source", TRUE)))
-    u->sink_filename = pa_state_path(fn);
-    pa_xfree(fn);
-
-    if (!u->sink_filename)
-        goto fail;
-
-    fn = pa_sprintf_malloc("default-source.%s", hn);
-    u->source_filename = pa_state_path(fn);
-    pa_xfree(fn);
-
-    if (!u->source_filename)
         goto fail;
 
     load(u);

src/modules/module-device-restore.c

@@ -284,7 +284,6 @@ int pa__init(pa_module*m) {
     pa_modargs *ma = NULL;
     struct userdata *u;
     char *fname, *fn;
-    char hn[256];
     pa_sink *sink;
     pa_source *source;
     uint32_t idx;
@@ -321,11 +320,12 @@ int pa__init(pa_module*m) {
         u->source_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) source_fixate_hook_callback, u);
     }
 
-    if (!pa_get_host_name(hn, sizeof(hn)))
+    /* We include the host identifier in the file name because gdbm
-        goto fail;
+     * files are CPU dependant, and we don't want things to go wrong
+     * if we are on a multiarch system. */
 
-    fn = pa_sprintf_malloc("device-volumes.%s."CANONICAL_HOST".gdbm", hn);
+    fn = pa_sprintf_malloc("device-volumes."CANONICAL_HOST".gdbm");
-    fname = pa_state_path(fn);
+    fname = pa_state_path(fn, TRUE);
     pa_xfree(fn);
 
     if (!fname)

src/modules/module-stream-restore.c

@@ -666,7 +666,6 @@ int pa__init(pa_module*m) {
     pa_modargs *ma = NULL;
     struct userdata *u;
     char *fname, *fn;
-    char hn[256];
     pa_sink_input *si;
     pa_source_output *so;
     uint32_t idx;
@@ -714,11 +713,12 @@ int pa__init(pa_module*m) {
     if (restore_volume || restore_muted)
         u->sink_input_fixate_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_FIXATE], PA_HOOK_EARLY, (pa_hook_cb_t) sink_input_fixate_hook_callback, u);
 
-    if (!pa_get_host_name(hn, sizeof(hn)))
+    /* We include the host identifier in the file name because gdbm
-        goto fail;
+     * files are CPU dependant, and we don't want things to go wrong
+     * if we are on a multiarch system. */
 
-    fn = pa_sprintf_malloc("stream-volumes.%s."CANONICAL_HOST".gdbm", hn);
+    fn = pa_sprintf_malloc("stream-volumes."CANONICAL_HOST".gdbm");
-    fname = pa_state_path(fn);
+    fname = pa_state_path(fn, TRUE);
     pa_xfree(fn);
 
     if (!fname)

src/modules/module-volume-restore.c

@@ -493,7 +493,7 @@ int pa__init(pa_module*m) {
 
     m->userdata = u;
 
-    if (!(u->table_file = pa_state_path(pa_modargs_get_value(ma, "table", DEFAULT_VOLUME_TABLE_FILE))))
+    if (!(u->table_file = pa_state_path(pa_modargs_get_value(ma, "table", DEFAULT_VOLUME_TABLE_FILE), TRUE)))
         goto fail;
 
     if (pa_modargs_get_value_boolean(ma, "restore_device", &restore_device) < 0 ||

src/pulsecore/core-util.c

@@ -1690,7 +1690,7 @@ char *pa_make_path_absolute(const char *p) {
 /* if fn is null return the PulseAudio run time path in s (~/.pulse)
  * if fn is non-null and starts with / return fn
  * otherwise append fn to the run time path and return it */
-static char *get_path(const char *fn, pa_bool_t rt) {
+static char *get_path(const char *fn, pa_bool_t prependmid, pa_bool_t rt) {
     char *rtp;
 
     if (pa_is_path_absolute(fn))
@@ -1703,7 +1703,20 @@ static char *get_path(const char *fn, pa_bool_t rt) {
 
     if (fn) {
         char *r;
-        r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", rtp, fn);
+
+        if (prependmid) {
+            char *mid;
+
+            if (!(mid = pa_machine_id())) {
+                pa_xfree(rtp);
+                return NULL;
+            }
+
+            r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s:%s", rtp, mid, fn);
+            pa_xfree(mid);
+        } else
+            r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", rtp, fn);
+
         pa_xfree(rtp);
         return r;
     } else
@@ -1711,11 +1724,11 @@ static char *get_path(const char *fn, pa_bool_t rt) {
 }
 
 char *pa_runtime_path(const char *fn) {
-    return get_path(fn, 1);
+    return get_path(fn, FALSE, TRUE);
 }
 
-char *pa_state_path(const char *fn) {
+char *pa_state_path(const char *fn, pa_bool_t appendmid) {
-    return get_path(fn, 0);
+    return get_path(fn, appendmid, FALSE);
 }
 
 /* Convert the string s to a signed integer in *ret_i */

src/pulsecore/core-util.h

@@ -121,7 +121,7 @@ char* pa_find_config_file(const char *global, const char *local, const char *env
 char *pa_get_runtime_dir(void);
 char *pa_get_state_dir(void);
 char *pa_runtime_path(const char *fn);
-char *pa_state_path(const char *fn);
+char *pa_state_path(const char *fn, pa_bool_t prepend_machine_id);
 
 int pa_atoi(const char *s, int32_t *ret_i);
 int pa_atou(const char *s, uint32_t *ret_u);