X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/73e643057a95ed6f20d6bd03bc8cd13a7042f9aa..e911e356ac0e77b7633e2ec2d74dee62d926c227:/examples/c/io-file-system/io-file-system.c

diff --git a/examples/c/io-file-system/io-file-system.c b/examples/c/io-file-system/io-file-system.c
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+++ b/examples/c/io-file-system/io-file-system.c
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+/* Copyright (c) 2008-2020. 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. */
+
+#include "simgrid/actor.h"
+#include "simgrid/disk.h"
+#include "simgrid/engine.h"
+#include "simgrid/host.h"
+#include "simgrid/plugins/file_system.h"
+
+#include "xbt/log.h"
+#include "xbt/str.h"
+#include "xbt/sysdep.h"
+
+#include <stdio.h> /* SEEK_SET */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(io_file_system, "Messages specific for this io example");
+
+static void show_info(unsigned int disk_count, sg_disk_t* disks)
+{
+  XBT_INFO("Storage info on %s:", sg_host_self_get_name());
+
+  for (unsigned int i = 0; i < disk_count; i++) {
+    sg_disk_t d = disks[i];
+    // Retrieve disk's information
+    XBT_INFO("    %s (%s) Used: %llu; Free: %llu; Total: %llu.", sg_disk_name(d), sg_disk_get_mount_point(d),
+             sg_disk_get_size_used(d), sg_disk_get_size_free(d), sg_disk_get_size(d));
+  }
+}
+
+static void host(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
+{
+  unsigned int disk_count;
+  sg_disk_t* disks;
+  sg_host_disks(sg_host_self(), &disk_count, &disks);
+
+  show_info(disk_count, disks);
+
+  // Open an non-existing file to create it
+  const char* filename = "/scratch/tmp/data.txt";
+  sg_file_t file       = sg_file_open(filename, NULL);
+
+  sg_size_t write = sg_file_write(file, 200000); // Write 200,000 bytes
+  XBT_INFO("Create a %llu bytes file named '%s' on /scratch", write, filename);
+
+  // check that sizes have changed
+  show_info(disk_count, disks);
+
+  // Now retrieve the size of created file and read it completely
+  const sg_size_t file_size = sg_file_get_size(file);
+  sg_file_seek(file, 0, SEEK_SET);
+  const sg_size_t read = sg_file_read(file, file_size);
+  XBT_INFO("Read %llu bytes on %s", read, filename);
+
+  // Now write 100,000 bytes in tmp/data.txt
+  write = sg_file_write(file, 100000); // Write 100,000 bytes
+  XBT_INFO("Write %llu bytes on %s", write, filename);
+
+  // Now rename file from ./tmp/data.txt to ./tmp/simgrid.readme
+  const char* newpath = "/scratch/tmp/simgrid.readme";
+  XBT_INFO("Move '%s' to '%s'", sg_file_get_name(file), newpath);
+  sg_file_move(file, newpath);
+
+  // Test attaching some user data to the file
+  sg_file_set_data(file, xbt_strdup("777"));
+  char* file_data = (char*)(sg_file_get_data(file));
+  XBT_INFO("User data attached to the file: %s", file_data);
+  xbt_free(file_data);
+
+  // Close the file
+  sg_file_close(file);
+
+  show_info(disk_count, disks);
+
+  // Reopen the file and then unlink it
+  file = sg_file_open("/scratch/tmp/simgrid.readme", NULL);
+  XBT_INFO("Unlink file: '%s'", sg_file_get_name(file));
+  sg_file_unlink(file);
+
+  show_info(disk_count, disks);
+  xbt_free(disks);
+}
+
+int main(int argc, char** argv)
+{
+  simgrid_init(&argc, argv);
+  sg_storage_file_system_init();
+  simgrid_load_platform(argv[1]);
+  sg_actor_create("host", sg_host_by_name("bob"), host, 0, NULL);
+  simgrid_run();
+
+  return 0;
+}