--- /dev/null
+/* Copyright (c) 2006-2015. The SimGrid Team.
+ * All rights reserved. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+/** @addtogroup MSG_examples
+ *
+ * - <b>io/storage.c</b> demo of all main storage and file functions
+ */
+
+/********************* Files and Storage handling ****************************
+ * This example implements all main storage and file functions of the MSG API
+ *
+ * Scenario :
+ * - display information on the disks mounted by the current host
+ * - create a 200,000 bytes file
+ * - completely read the created file
+ * - write 100,000 bytes in the file
+ * - rename the created file
+ * - attach some user data to a disk
+ * - dump disk's contents
+ *
+******************************************************************************/
+
+#include "simgrid/msg.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(storage,"Messages specific for this simulation");
+
+static int host(int argc, char *argv[]){
+ const char* host_name = MSG_host_get_name(MSG_host_self());
+
+ // display information on the disks mounted by the current host
+ XBT_INFO("*** Storage info on %s ***", host_name);
+
+ xbt_dict_cursor_t cursor = NULL;
+ char* mount_name;
+ char* storage_name;
+ msg_storage_t storage = NULL;
+
+ // Retrieve all mount points of current host
+ xbt_dict_t storage_list = MSG_host_get_mounted_storage_list(MSG_host_self());
+
+ xbt_dict_foreach(storage_list,cursor,mount_name,storage_name) {
+ // For each disk mounted on host
+ XBT_INFO("Storage name: %s, mount name: %s", storage_name, mount_name);
+ storage = MSG_storage_get_by_name(storage_name);
+
+ // Retrieve disk's information
+ sg_size_t free_size = MSG_storage_get_free_size(storage);
+ sg_size_t used_size = MSG_storage_get_used_size(storage);
+ sg_size_t size = MSG_storage_get_size(storage);
+
+ XBT_INFO("Total size: %llu bytes", size);
+ XBT_INFO("Free size: %llu bytes", free_size);
+ XBT_INFO("Used size: %llu bytes", used_size);
+ }
+ xbt_dict_free(&storage_list);
+
+ // Create a 200,000 bytes file named './tmp/data.txt' on /sd1
+ char* file_name = xbt_strdup("/home/tmp/data.txt");
+ msg_file_t file = NULL;
+ sg_size_t write, read, file_size;
+
+ // Open an non-existing file amounts to create it!
+ file = MSG_file_open(file_name, NULL);
+ write = MSG_file_write(file, 200000); // Write 200,000 bytes
+ XBT_INFO("Create a %llu bytes file named '%s' on /sd1", write, file_name);
+ MSG_file_dump(file);
+
+ // check that sizes have changed
+ XBT_INFO("Free size: %llu bytes", MSG_storage_get_free_size(storage));
+ XBT_INFO("Used size: %llu bytes", MSG_storage_get_used_size(storage));
+
+ // Now retrieve the size of created file and read it completely
+ file_size = MSG_file_get_size(file);
+ MSG_file_seek(file, 0, SEEK_SET);
+ read = MSG_file_read(file, file_size);
+ XBT_INFO("Read %llu bytes on %s", read, file_name);
+
+ // Now write 100,000 bytes in tmp/data.txt
+ write = MSG_file_write(file, 100000); // Write 100,000 bytes
+ XBT_INFO("Write %llu bytes on %s", write, file_name);
+ MSG_file_dump(file);
+
+ storage_name = xbt_strdup("Disk4");
+ storage = MSG_storage_get_by_name(storage_name);
+
+ // Now rename file from ./tmp/data.txt to ./tmp/simgrid.readme
+ XBT_INFO("*** Move '/tmp/data.txt' into '/tmp/simgrid.readme'");
+ MSG_file_move(file, "/home/tmp/simgrid.readme");
+
+ // Attach some user data to the file
+ MSG_file_set_data(file, xbt_strdup("777"));
+ // Retrieve these data
+ char *data = MSG_file_get_data(file);
+ XBT_INFO("User data attached to the file: %s", data);
+
+ MSG_file_close(file);
+ free(file_name);
+
+ // Now attach some user data to disk1
+ XBT_INFO("*** Get/set data for storage element: %s ***",storage_name);
+
+ data = MSG_storage_get_data(storage);
+
+ XBT_INFO("Get storage data: '%s'", data);
+
+ MSG_storage_set_data(storage, xbt_strdup("Some user data"));
+ data = MSG_storage_get_data(storage);
+ XBT_INFO("Set and get data: '%s'", data);
+ xbt_free(data);
+ xbt_free(storage_name);
+
+ // Dump disks contents
+ XBT_INFO("*** Dump content of %s ***",MSG_host_get_name(MSG_host_self()));
+ xbt_dict_t contents = NULL;
+ contents = MSG_host_get_storage_content(MSG_host_self()); // contents is a dict of dicts
+ xbt_dict_cursor_t curs, curs2 = NULL;
+ char* mountname;
+ xbt_dict_t content;
+ char* path;
+ sg_size_t *size;
+ xbt_dict_foreach(contents, curs, mountname, content){
+ XBT_INFO("Print the content of mount point: %s",mountname);
+ xbt_dict_foreach(content,curs2,path,size){
+ XBT_INFO("%s size: %llu bytes", path,*((sg_size_t*)size));
+ }
+ xbt_dict_free(&content);
+ }
+ xbt_dict_free(&contents);
+ return 1;
+}
+
+int main(int argc, char *argv[])
+{
+ MSG_init(&argc, argv);
+ MSG_create_environment(argv[1]);
+ MSG_function_register("host", host);
+ xbt_dynar_t hosts = MSG_hosts_as_dynar();
+ MSG_process_create(NULL, host, NULL, xbt_dynar_get_as(hosts,0,msg_host_t) );
+ xbt_dynar_free(&hosts);
+
+ msg_error_t res = MSG_main();
+ XBT_INFO("Simulated time: %g", MSG_get_clock());
+
+ return res != MSG_OK;
+}
