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/* Copyright (c) 2006-2025. 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 <string>
#include <vector>
#include "simgrid/plugins/file_system.h"
#include "simgrid/s4u.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "a sample log category");
namespace sg4 = simgrid::s4u;
class MyHost {
public:
void show_info(std::vector<sg4::Disk*> const& disks) const
{
XBT_INFO("Storage info on %s:", sg4::Host::current()->get_cname());
for (auto const& d : disks) {
// Retrieve disk's information
XBT_INFO(" %s (%s) Used: %llu; Free: %llu; Total: %llu.", d->get_cname(), sg_disk_get_mount_point(d),
sg_disk_get_size_used(d), sg_disk_get_size_free(d), sg_disk_get_size(d));
}
}
void operator()() const
{
std::vector<sg4::Disk*> const& disks = sg4::Host::current()->get_disks();
show_info(disks);
// Open a non-existing file to create it
std::string filename = "/scratch/tmp/data.txt";
auto* file = sg4::File::open(filename, nullptr);
sg_size_t write = file->write(200000); // Write 200,000 bytes
XBT_INFO("Create a %llu bytes file named '%s' on /scratch", write, filename.c_str());
// check that sizes have changed
show_info(disks);
// Now retrieve the size of created file and read it completely
const sg_size_t file_size = file->size();
file->seek(0);
const sg_size_t read = file->read(file_size);
XBT_INFO("Read %llu bytes on %s", read, filename.c_str());
// Now write 100,000 bytes in tmp/data.txt
write = file->write(100000); // Write 100,000 bytes
XBT_INFO("Write %llu bytes on %s", write, filename.c_str());
// Now rename file from ./tmp/data.txt to ./tmp/simgrid.readme
std::string newpath = "/scratch/tmp/simgrid.readme";
XBT_INFO("Move '%s' to '%s'", file->get_path(), newpath.c_str());
file->move(newpath);
// Test attaching some user data to the file
file->set_data(new std::string("777"));
auto file_data = file->get_unique_data<std::string>();
XBT_INFO("User data attached to the file: %s", file_data->c_str());
// Close the file
file->close();
show_info(disks);
// Reopen the file and then unlink it
file = sg4::File::open("/scratch/tmp/simgrid.readme", nullptr);
XBT_INFO("Unlink file: '%s'", file->get_path());
file->unlink();
file->close(); // Unlinking the file on "disk" does not close the file and free the object
show_info(disks);
// Open another file on disk without a "content" property
filename = "/lib/libc.so";
file = sg4::File::open(filename, nullptr);
write = file->write(4096); // Write 4 Kbytes
XBT_INFO("Create a %llu bytes file named '%s' on /", write, filename.c_str());
file->close();
show_info(disks);
}
};
int main(int argc, char** argv)
{
sg4::Engine e(&argc, argv);
sg_storage_file_system_init();
e.load_platform(argv[1]);
e.host_by_name("bob")->add_actor("host", MyHost());
e.run();
return 0;
}
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