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/* Copyright (c) 2008-2025. 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 "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, const sg_disk_t* disks)
{
XBT_INFO("Storage info on %s:", sg_host_self_get_name());
for (unsigned int i = 0; i < disk_count; i++) {
const_sg_disk_t d = disks[i];
// Retrieve disk's information
XBT_INFO(" %s (%s) Used: %llu; Free: %llu; Total: %llu.", sg_disk_get_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(int argc, char* argv[])
{
unsigned int disk_count;
sg_disk_t* disks;
sg_host_get_disks(sg_host_self(), &disk_count, &disks);
show_info(disk_count, disks);
// Open a 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);
// Open another file on disk without a "content" property
filename = "/lib/libc.so";
file = sg_file_open(filename, NULL);
write = sg_file_write(file, 4096); // Write 4 Kbytes
XBT_INFO("Create a %llu bytes file named '%s' on /", write, filename);
sg_file_close(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;
}
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