839ae82d66
It's not enough to send ourselves a SIGABRT, as it may be ignored or handled differently. We really, really want abort() to never return, as that will mess up the assumptions of the calling code big time. So, if raise(SIGABRT) returns, kill ourselves with SIGKILL, and if that somehow returns too, call _exit(). An alternative approach, which glibc apparently follows, is to reset SIGABRT disposition to its default value and then send SIGABRT to yourself a second time. That would also work, but I believe SIGKILL + _exit() to be a simpler approach that is less likely to break in extremely weird situations. Note that this only guarantees that abort() never returns, not that the process actually gets killed. It's still possible to install a SIGABRT handler that simply never returns (such as by longjmp'ing out, endlessly looping, or exec'ing another image). That is a legitimate use case we want to support; at the same time most software doesn't use that functionality and would benefit from hard guarantees that abort() terminates the program. The following commit is going to introduce means for ensuring SIGABRT handler is never reset to something unexpected. |
||
|---|---|---|
| .github | ||
| AK | ||
| Applications | ||
| Base | ||
| Demos | ||
| DevTools | ||
| Documentation | ||
| Games | ||
| Kernel | ||
| Libraries | ||
| MenuApplets | ||
| Meta | ||
| Ports | ||
| Services | ||
| Shell | ||
| Tests | ||
| Toolchain | ||
| Userland | ||
| .clang-format | ||
| .gitignore | ||
| .travis.yml | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| INSTALL.md | ||
| LICENSE | ||
| ReadMe.md | ||
SerenityOS
Graphical Unix-like operating system for x86 computers.
About
SerenityOS is a love letter to '90s user interfaces with a custom Unix-like core. It flatters with sincerity by stealing beautiful ideas from various other systems.
Roughly speaking, the goal is a marriage between the aesthetic of late-1990s productivity software and the power-user accessibility of late-2000s *nix. This is a system by us, for us, based on the things we like.
I (Andreas) regularly post raw hacking sessions and demos on my YouTube channel.
Sometimes I write about the system on my github.io blog.
I'm also on Patreon and GitHub Sponsors if you would like to show some support that way.
Screenshot
Kernel features
- x86 (32-bit) kernel with pre-emptive multi-threading
- Hardware protections (SMEP, SMAP, UMIP, NX, WP, TSD, ...)
- IPv4 stack with ARP, TCP, UDP and ICMP protocols
- ext2 filesystem
- POSIX signals
- Purgeable memory
- /proc filesystem
- Pseudoterminals (with /dev/pts filesystem)
- Filesystem notifications
- CPU and memory profiling
- SoundBlaster 16 driver
- VMWare/QEMU mouse integration
System services
- Launch/session daemon (SystemServer)
- Compositing window server (WindowServer)
- Text console manager (TTYServer)
- DNS client (LookupServer)
- Network protocols server (ProtocolServer)
- Software-mixing sound daemon (AudioServer)
- Desktop notifications (NotificationServer)
- HTTP server (WebServer)
- Telnet server (TelnetServer)
- DHCP client (DHCPClient)
Libraries
- C++ templates and containers (AK)
- Event loop and utilities (LibCore)
- 2D graphics library (LibGfx)
- GUI toolkit (LibGUI)
- Cross-process communication library (LibIPC)
- HTML/CSS engine (LibWeb)
- JavaScript engine (LibJS)
- Markdown (LibMarkdown)
- Audio (LibAudio)
- PCI database (LibPCIDB)
- Terminal emulation (LibVT)
- Out-of-process network protocol I/O (LibProtocol)
- Mathematical functions (LibM)
- ELF file handing (LibELF)
- POSIX threading (LibPthread)
- Higher-level threading (LibThread)
- Transport Layer Security (LibTLS)
- HTTP and HTTPS (LibHTTP)
Userland features
- Unix-like libc and userland
- Shell with pipes and I/O redirection
- On-line help system (both terminal and GUI variants)
- Web browser (Browser)
- C++ IDE (HackStudio)
- IRC client
- Desktop synthesizer (Piano)
- Various desktop apps & games
- Color themes
How do I read the documentation?
Man pages are browsable outside of SerenityOS under Base/usr/share/man.
When running SerenityOS you can use man for the terminal interface, or help for the GUI interface.
How do I build and run this?
See the SerenityOS build instructions
Before opening an issue
Please see the issue policy.
Wanna chat?
Come hang out with us in #serenityos on the Freenode IRC network.
Author
- Andreas Kling - awesomekling
Contributors
- Robin Burchell - rburchell
- Conrad Pankoff - deoxxa
- Sergey Bugaev - bugaevc
- Liav A - supercomputer7
- Linus Groh - linusg
- Ali Mohammad Pur - alimpfard
- Shannon Booth - shannonbooth
(And many more!) The people listed above have landed more than 100 commits in the project. :^)
License
SerenityOS is licensed under a 2-clause BSD license.