StormByte-System

StormByte-System is the C++26 process, device and host module of the StormByte suite.

Spawn children with piped stdin/stdout/stderr, classify the medium behind a path, resolve directories and the current executable, inspect the machine, name the calling thread, and expand environment strings. POSIX and Windows stay behind one API. Failures are StormByte::Error::Fault in a per-type domain (StormByte.System.*). Nothing in this module throws.

Table of Contents

• Repository
• Installation
• Why StormByte-System
• Features
• Dependencies
• The rest of the suite
• Public API
• Examples
  • Run a process
  • Pipe two processes
  • Classify a device
  • Directories and files
  • Host
  • Calling thread
  • Expand variables
• Design notes
• Testing
• Contributing
• License
• Support

Repository

• StormByte-System

Installation

git clone https://github.com/StormBytePP/StormByte-System.git
cd StormByte-System
cmake -S . -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build -j
cmake --install build

Shared vs static follows CMake BUILD_SHARED_LIBS (declared in lib/, default ON). A plain configure builds the shared library. -DBUILD_SHARED_LIBS=OFF builds a static archive; on Windows the headers then do not use dllimport. Vendored StormByte-String (and Base through String) follows the same mode.

A shared build keeps this library as its own .so / .dll. Under the LGPL that is usually the simpler way to ship: the user can replace that file. A static archive is folded into your binary. The LGPL still applies to this code; you must give the recipient a way to relink your product with a different build of this library. If that does not fit how you distribute the final product, a commercial license is available from the copyright holder (see License).

Why StormByte-System

Goal	How it is achieved
One process API	Process starts on construct; pipes are private. Errors are Fault(), not exceptions.
Shell-like chaining	p1 >> p2 forwards stdout to stdin on a worker thread.
stdin control	<< writes; << System::EoF closes the write end.
Medium behind a path	Device probes Kind, Access, Throughput and Window on demand.
This process on disk	Directory and File resolve cwd, home, temp and the running image.
This machine	Host reports name, OS, kernel, CPU, ISA, RAM and bitness.
This thread	ThisThread::Sleep and Name (reject, do not truncate, if too long).
Environment text	Variable::Expand (VAR% on Windows, ~ on UNIX).

Features

• Move-only Process (fork/exec or CreateProcessW)
• Piped stdin, stdout, stderr; chaining; Wait / timed Wait; Suspend / Resume
• Device classification (HDD, SSD, NVMe generations, USB, Network)
• Directory / File locations of this process
• Host identity and capacity
• ThisThread sleep and name
• Variable::Expand
• Private Pipe (pipe2 / CreatePipe)
• Dual license on original sources

Dependencies

Dependency	Role
StormByte-String 1.0.0	UTF-8 / UTF-16 text across the DLL boundary (vendors Base 2.0.0)

The rest of the suite

Module	Role	API
Base	Error/Fault, visibility, Size, Bitmask, serialization, UUID, concepts	/StormByte
Buffer	FIFO, SharedFIFO, Ring, Producer/Consumer and multi-stage pipelines	/StormByte-Buffer
Config	Human-readable text and versioned binary documents	/StormByte-Config
Crypto	Hash, compress, encrypt, sign and key agreement	/StormByte-Crypto
Database	One API over SQLite, PostgreSQL and MariaDB	/StormByte-Database
Logger	Stream logger with levels, headers and redaction	/StormByte-Logger
Multimedia	Decode, encode and containers without raw FFmpeg types	/StormByte-Multimedia
Network	Framed packets, Client/Server, IPv4/IPv6 TCP	/StormByte-Network
String	Owned UTF-8 / UTF-16 text safe across a DLL boundary	/StormByte-String
System	This repository	/StormByte-System

Public API

Name	Role
Process	Spawn and talk to a child. operator bool is true only while the child is live. Fault() is StormByte.System.Process.
Device	Medium behind a path. operator bool is probe success, not permission. Fault() is StormByte.System.Device. Throughput / Window are virtual.
Directory	Current, Home, Temporary, CurrentExecutable. bool + out String. LastError() is TLS in this module.
File	Temporary(prefix, suffix) (caller unlinks) and CurrentExecutable. Same bool + LastError contract.
Host	Name, Architecture, CPU, OS, Kernel, PageSize, PhysicalMemory, AvailableMemory, LogicalProcessors, Bitness.
ThisThread	Sleep; Name get/set. Set returns false and TooLong if the platform limit is exceeded.
Variable	Expand environment strings to StormByte::String::String.
System::EoF	Close process stdin.

Pipe is private. There is no StormByte/system/exception.hxx and no generic StormByte.System error domain.

Examples

Run a process

#include <StormByte/system/process.hxx>
 
using StormByte::System::Process;
 
Process missing("/no/such/stormbyte-tool");
if (!missing) {
    if (missing.Fault().code() == make_error_code(Process::Error::ExecutableNotFound))
        /* spawn failed */;
}
 
Process echo("echo", {StormByte::String::String("hello")});
if (!echo)
    return;
StormByte::String::String out;
echo >> out;
if (echo.Wait() != 0)
    /* child status */;
if (echo.Fault().code() == make_error_code(Process::Error::AlreadyExited))
    /* second Wait */;

On Windows use a real binary (cmd.exe, where.exe) instead of echo if it is not on PATH the way you expect.

Pipe two processes

Process producer("printf", {StormByte::String::String("%s"), StormByte::String::String("hello\n")});
Process consumer("tr", {StormByte::String::String("a-z"), StormByte::String::String("A-Z")});
producer >> consumer;
producer << StormByte::System::EoF;
StormByte::String::String out;
consumer >> out;
producer.Wait();
consumer.Wait();

Classify a device

#include <StormByte/system/device.hxx>
 
StormByte::System::Device root("/");
if (!root) {
    /* BrokenSymlink, DeviceNotFound, Permission, ProbeFailed */
    return;
}
auto kind = root.Kind();
auto access = root.Access();
auto rate = root.Throughput();
auto window = root.Window();

On Windows pass C:\\. operator bool is not “can write”. A special device node is never writable. Symlinks are followed; a dangling link is BrokenSymlink.

Directories and files

#include <StormByte/system/directory.hxx>
#include <StormByte/system/file.hxx>
 
StormByte::String::String cwd, home, tmpdir, exe_dir, exe, scratch;
if (!StormByte::System::Directory::Current(cwd))
    /* Directory::LastError() */;
StormByte::System::Directory::Home(home);
StormByte::System::Directory::Temporary(tmpdir);
StormByte::System::Directory::CurrentExecutable(exe_dir);
StormByte::System::File::CurrentExecutable(exe);
if (StormByte::System::File::Temporary(scratch, "SB", ".tmp")) {
    /* use scratch; caller unlinks */
}

Windows File::Temporary only uses the first three characters of the prefix (GetTempFileNameW). The suffix is appended after the generated name.

Host

#include <StormByte/system/host.hxx>
 
StormByte::String::String hostname;
StormByte::System::Host::Name(hostname);
auto os = StormByte::System::Host::OS();       // "Gentoo 2.18", "Windows 11", "macOS 15.1"
auto kernel = StormByte::System::Host::Kernel(); // "Linux … SMP PREEMPT_DYNAMIC", "NT 10.0.26100", "Darwin …"
auto cpu = StormByte::System::Host::CPU();
auto arch = StormByte::System::Host::Architecture();
auto page = StormByte::System::Host::PageSize();
auto ram = StormByte::System::Host::PhysicalMemory();
unsigned bits = StormByte::System::Host::Bitness();

LogicalProcessors and Bitness do not update LastError. The others do. A failed Size is zero; a failed String is empty.

Calling thread

#include <StormByte/system/this_thread.hxx>
 
StormByte::System::ThisThread::Sleep(std::chrono::milliseconds(10));
if (!StormByte::System::ThisThread::Name("worker-1")) {
    /* TooLong or Failed; LastError() */
}
StormByte::String::String name;
StormByte::System::ThisThread::Name(name);

On Linux/macOS the pthread name limit is 15 characters. Windows SetThreadDescription does not use that limit.

Expand variables

#include <StormByte/system/variable.hxx>
 
auto home = StormByte::System::Variable::Expand("~");
auto tmp = StormByte::System::Variable::Expand("%TEMP%");

A failed Windows expand returns the original text (same idea as a missing UNIX $HOME).

Design notes

• Process construction starts the child immediately and does not throw. operator bool is live status only.
• Timed Wait sets TimedOut and leaves the child running.
• On UNIX, System ignores SIGPIPE once process-wide so a closed pipe peer reports write failure instead of killing the host.
• Windows Suspend() / Resume() snapshot the child threads; a thread created during enumeration may be missed.
• Windows stdio handles are made non-inheritable after CreateProcessW; a short inheritance window exists during creation.
• Device stores only the caller accessor. Kind/Access/Throughput/Window are valid only when the Device converts to true.
• Directory / File / Host / ThisThread LastError() is thread_local inside this module, exposed by an exported getter. Do not put thread_local in a public header.
• Public text across a DLL boundary is StormByte::String::String / CString.
• Destructor of Process waits if the child is still owned. Move invalidates the source.

Testing

Enable tests in CMake (ENABLE_TEST) and run CTest from the build tree. Device, Directory, File, Host and ThisThread print probe data and always return success (the machine is not a fixture). Process tests assert error codes. Use ctest -V to see stdout.

Contributing

Issues and pull requests belong on this repository. Fork and open a PR against master.

Read CONTRIBUTING.md before you send a patch (copyright assignment and review rules). Coding rules are in CODING_STYLE.md when that file exists.

License

Original StormByte-System sources are dual-licensed: GNU Lesser General Public License v3 or later or a commercial license from the copyright holder (David C. Manuelda Storm.nosp@m.Byte.nosp@m.@gmai.nosp@m.l.co.nosp@m.m).

The grant applies only to original StormByte-System source in this repository. It does not cover other StormByte modules or third-party material shipped here (including everything under thirdparty/), which remains under its own license. Neither license grants patent rights.

See [LICENSE](LICENSE) for the dual-license notice and COPYING.LGPLv3 for the full GNU LGPL version 3 text. Also https://www.gnu.org/licenses/lgpl-3.0.html.

Static linking under the LGPL is described under Installation.

Support

StormByte is developed in spare time. Sponsorship is optional and does not buy features, priority or support.

• GitHub Sponsors
• PayPal