Cleanup: typo fix in comment
[babeltrace.git] / plugins / ctf / fs-sink / write.c
index cf8112fd521af54b4160c364004629507f7f817d..feee19472fe086fc7c3a90258e734b50f0ad0053 100644 (file)
@@ -53,20 +53,54 @@ void unref_stream(struct bt_ctf_stream_class *writer_stream)
        bt_put(writer_stream);
 }
 
+static
 gboolean empty_ht(gpointer key, gpointer value, gpointer user_data)
 {
        return TRUE;
 }
 
+static
+gboolean empty_streams_ht(gpointer key, gpointer value, gpointer user_data)
+{
+       struct bt_ctf_stream *writer_stream = value;
+
+       bt_ctf_stream_flush(writer_stream);
+
+       return TRUE;
+}
+
+static
 void destroy_stream_state_key(gpointer key)
 {
        g_free((enum fs_writer_stream_state *) key);
 }
 
+static
+void check_completed_trace(gpointer key, gpointer value, gpointer user_data)
+{
+       enum fs_writer_stream_state *state = value;
+       int *trace_completed = user_data;
+
+       if (*state != FS_WRITER_COMPLETED_STREAM) {
+               *trace_completed = 0;
+       }
+}
+
 static
 void trace_is_static_listener(struct bt_ctf_trace *trace, void *data)
 {
-       *((int *) data) = 1;
+       struct fs_writer *fs_writer = data;
+       int trace_completed = 1;
+
+       fs_writer->trace_static = 1;
+
+       g_hash_table_foreach(fs_writer->stream_states,
+                       check_completed_trace, &trace_completed);
+       if (trace_completed) {
+               writer_close(fs_writer->writer_component, fs_writer);
+               g_hash_table_remove(fs_writer->writer_component->trace_map,
+                               fs_writer->trace);
+       }
 }
 
 static
@@ -147,6 +181,118 @@ enum fs_writer_stream_state *insert_new_stream_state(
        return v;
 }
 
+/*
+ * Make sure the output path is valid for a single trace: either it does
+ * not exists or it is empty.
+ *
+ * Return 0 if the path is valid, -1 otherwise.
+ */
+static
+bool valid_single_trace_path(const char *path)
+{
+       int n = 0;
+       struct dirent *d;
+       DIR *dir = opendir(path);
+       int ret;
+
+       /* non-existent directory. */
+       if (!dir) {
+               ret = 0;
+               goto end;
+       }
+
+       while ((d = readdir(dir)) != NULL) {
+               if (++n > 2) {
+                       break;
+               }
+       }
+
+       ret = closedir(dir);
+       if (ret) {
+               perror("closedir");
+               goto end;
+       }
+
+       if (n <= 2) {
+               ret = 0;
+       } else {
+               ret = -1;
+       }
+
+end:
+       return ret;
+}
+
+static
+int make_trace_path(struct writer_component *writer_component,
+               struct bt_ctf_trace *trace, char *trace_path)
+{
+       int ret;
+       const char *trace_name;
+
+       if (writer_component->single_trace) {
+               trace_name = "\0";
+       } else {
+               trace_name = bt_ctf_trace_get_name(trace);
+               if (!trace_name) {
+                       trace_name = writer_component->trace_name_base->str;
+               }
+       }
+
+       /* Sanitize the trace name. */
+       if (strlen(trace_name) == 2 && !strcmp(trace_name, "..")) {
+               fprintf(writer_component->err, "[error] Trace name cannot "
+                               "be \"..\"\n");
+               goto error;
+       }
+
+       if (strstr(trace_name, "../")) {
+               fprintf(writer_component->err, "[error] Trace name cannot "
+                               "contain \"../\", received \"%s\"\n",
+                               trace_name);
+               goto error;
+
+       }
+
+       snprintf(trace_path, PATH_MAX, "%s/%s",
+                       writer_component->base_path->str,
+                       trace_name);
+       /*
+        * Append a suffix if the trace_path exists and we are not in
+        * single-trace mode.
+        */
+       if (writer_component->single_trace) {
+               if (valid_single_trace_path(trace_path) != 0) {
+                       fprintf(writer_component->err,
+                                       "[error] Invalid output directory\n");
+                       goto error;
+               }
+       } else {
+               if (g_file_test(trace_path, G_FILE_TEST_EXISTS)) {
+                       int i = 0;
+
+                       do {
+                               snprintf(trace_path, PATH_MAX, "%s/%s-%d",
+                                               writer_component->base_path->str,
+                                               trace_name, ++i);
+                       } while (g_file_test(trace_path, G_FILE_TEST_EXISTS) && i < INT_MAX);
+                       if (i == INT_MAX) {
+                               fprintf(writer_component->err, "[error] Unable to find "
+                                               "a unique trace path\n");
+                               goto error;
+                       }
+               }
+       }
+
+       ret = 0;
+       goto end;
+
+error:
+       ret = -1;
+end:
+       return ret;
+}
+
 static
 struct fs_writer *insert_new_writer(
                struct writer_component *writer_component,
@@ -154,20 +300,29 @@ struct fs_writer *insert_new_writer(
 {
        struct bt_ctf_writer *ctf_writer = NULL;
        struct bt_ctf_trace *writer_trace = NULL;
-       char trace_name[PATH_MAX];
+       char trace_path[PATH_MAX];
        enum bt_component_status ret;
        struct bt_ctf_stream *stream = NULL;
        struct fs_writer *fs_writer = NULL;
        int nr_stream, i;
 
-       /* FIXME: replace with trace name when it will work. */
-       snprintf(trace_name, PATH_MAX, "%s/%s_%03d",
-                       writer_component->base_path->str,
-                       writer_component->trace_name_base->str,
-                       writer_component->trace_id++);
-       printf_verbose("CTF-Writer creating trace in %s\n", trace_name);
+       if (writer_component->single_trace && writer_component->nr_traces > 0) {
+               fprintf(writer_component->err, "[error] Trying to process more "
+                               "than one trace but --single-trace mode "
+                               "enabled\n");
+               goto error;
+       }
 
-       ctf_writer = bt_ctf_writer_create(trace_name);
+       ret = make_trace_path(writer_component, trace, trace_path);
+       if (ret) {
+               fprintf(writer_component->err, "[error] %s in %s:%d\n",
+                               __func__, __FILE__, __LINE__);
+               goto error;
+       }
+
+       printf("ctf.fs sink creating trace in %s\n", trace_path);
+
+       ctf_writer = bt_ctf_writer_create(trace_path);
        if (!ctf_writer) {
                fprintf(writer_component->err, "[error] %s in %s:%d\n",
                                __func__, __FILE__, __LINE__);
@@ -201,6 +356,7 @@ struct fs_writer *insert_new_writer(
        fs_writer->writer = ctf_writer;
        fs_writer->trace = trace;
        fs_writer->writer_trace = writer_trace;
+       fs_writer->writer_component = writer_component;
        BT_PUT(writer_trace);
        fs_writer->stream_class_map = g_hash_table_new_full(g_direct_hash,
                        g_direct_equal, NULL, (GDestroyNotify) unref_stream_class);
@@ -229,7 +385,7 @@ struct fs_writer *insert_new_writer(
                fs_writer->static_listener_id = -1;
        } else {
                ret = bt_ctf_trace_add_is_static_listener(trace,
-                               trace_is_static_listener, &fs_writer->trace_static);
+                               trace_is_static_listener, fs_writer);
                if (ret < 0) {
                        fprintf(writer_component->err,
                                        "[error] %s in %s:%d\n", __func__, __FILE__,
@@ -239,6 +395,7 @@ struct fs_writer *insert_new_writer(
                fs_writer->static_listener_id = ret;
        }
 
+       writer_component->nr_traces++;
        g_hash_table_insert(writer_component->trace_map, (gpointer) trace,
                        fs_writer);
 
@@ -412,7 +569,7 @@ BT_HIDDEN
 void writer_close(struct writer_component *writer_component,
                struct fs_writer *fs_writer)
 {
-       if (fs_writer->static_listener_id > 0) {
+       if (fs_writer->static_listener_id >= 0) {
                bt_ctf_trace_remove_is_static_listener(fs_writer->trace,
                                fs_writer->static_listener_id);
        }
@@ -424,7 +581,7 @@ void writer_close(struct writer_component *writer_component,
 
        /* Empty the stream HT. */
        g_hash_table_foreach_remove(fs_writer->stream_map,
-                       empty_ht, NULL);
+                       empty_streams_ht, NULL);
        g_hash_table_destroy(fs_writer->stream_map);
 
        /* Empty the stream state HT. */
@@ -483,7 +640,6 @@ enum bt_component_status writer_stream_begin(
                                __func__, __FILE__, __LINE__);
                goto error;
        }
-       fs_writer->active_streams++;
 
        goto end;
 
@@ -494,16 +650,6 @@ end:
        return ret;
 }
 
-void check_completed_trace(gpointer key, gpointer value, gpointer user_data)
-{
-       enum fs_writer_stream_state *state = value;
-       int *trace_completed = user_data;
-
-       if (*state != FS_WRITER_COMPLETED_STREAM) {
-               *trace_completed = 0;
-       }
-}
-
 BT_HIDDEN
 enum bt_component_status writer_stream_end(
                struct writer_component *writer_component,
@@ -567,7 +713,6 @@ enum bt_component_status writer_new_packet(
                struct bt_ctf_packet *packet)
 {
        struct bt_ctf_stream *stream = NULL, *writer_stream = NULL;
-       struct bt_ctf_field *writer_packet_context = NULL;
        enum bt_component_status ret = BT_COMPONENT_STATUS_OK;
        int int_ret;
 
@@ -586,23 +731,21 @@ enum bt_component_status writer_new_packet(
        }
        BT_PUT(stream);
 
-       writer_packet_context = ctf_copy_packet_context(writer_component->err,
-                       packet, writer_stream, 1);
-       if (!writer_packet_context) {
+       int_ret = ctf_stream_copy_packet_context(
+                       writer_component->err, packet, writer_stream);
+       if (int_ret < 0) {
                fprintf(writer_component->err, "[error] %s in %s:%d\n",
                                __func__, __FILE__, __LINE__);
                goto error;
        }
 
-       int_ret = bt_ctf_stream_set_packet_context(writer_stream,
-                       writer_packet_context);
-       if (int_ret < 0) {
-               fprintf(writer_component->err, "[error] %s in %s:%d\n", __func__,
-                               __FILE__, __LINE__);
+       ret = ctf_stream_copy_packet_header(writer_component->err,
+                       packet, writer_stream);
+       if (ret != 0) {
+               fprintf(writer_component->err, "[error] %s in %s:%d\n",
+                               __func__, __FILE__, __LINE__);
                goto error;
        }
-       BT_PUT(writer_stream);
-       BT_PUT(writer_packet_context);
 
        goto end;
 
@@ -610,7 +753,6 @@ error:
        ret = BT_COMPONENT_STATUS_ERROR;
 end:
        bt_put(writer_stream);
-       bt_put(writer_packet_context);
        bt_put(stream);
        return ret;
 }
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