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Relicensed as GPL3, improved documentation and CONTRIBUTING

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CONTRIBUTING.md
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@ -1,14 +1,10 @@
Contents
========
* [Licensing](#licensing)
* [The **Cmd** trait](#the-cmd-trait)
* [A simple example applet](#a-simple-example-applet)
* [Incorporating a new applet](#incorporating-a-new-applet)
## Licensing
This code is BeerWare. It is essentially in the public domain. If you wish to
contribute, your name may be added to the credits, but by contributing you agree
to basically place your contributions into the public domain.
* [Dependencies](#dependencies)
* [Coding Guidelines](#coding_guidelines)
## The Cmd trait
The `Cmd` trait is defined in `src/cmd/mod.rs`. All applets should live in their
@ -16,6 +12,8 @@ own submodule under `crate::cmd` and include a struct with the name of the comma
in snake case. This struct must implement `Cmd`. It is recommended that this struct
have at least the fields `name: &'static str` and `path: crate::Path`. The
trait methods `name` and `path` can then just return the corresponding fields.
For simplicity's sake, `run` will always return `Box<dyn Error>` on failure and
bubble the error up to the caller, where the error will be presented to the user.
The applet module should further implement `Default` for the struct which implements
the `Cmd` trait.
@ -26,26 +24,10 @@ the `Cmd` trait.
use clap::Command;
use super::Cmd;
#[derive(Debug)]
pub struct MyApplet {
name: &'static str,
path: crate::Path,
}
impl Default for MyApplet {
fn default() -> Self {
Self {
name: "myapplet",
path: Some(crate::Path::UseBin),
}
}
}
#[derive(Debug, Default)]
pub struct MyApplet;
impl Cmd for MyApplet {
fn name(&self) -> &str {
self.name
}
fn cli(&self) -> clap::Command {
Command::new(self.name)
.version(env!("CARGO_PKG_VERSION"))
@ -59,7 +41,7 @@ impl Cmd for MyApplet {
}
fn path(&self) -> Option<crate::Path> {
self.path
Some(crate::Path::UsrBin)
}
}
```
@ -70,4 +52,36 @@ has a match statement, to which should be added a line which matches the name of
the new command and returns an `Option<Box<dyn Cmd>>` for your type. The static
`cmd::COMMANDS` should have your new command's name added and the array's number
incremented by 1.
## Dependencies
In order to accept a new dependency, the crate should provide utility that can be
used in multiple applets. It should introduce as few transitive dependencies as
possible, and the functionality provided should be something that cannot be easily
replicated cleanly. Preference is given to crates that are standalone and do not
significantly increase binary size. The prospective crate must be well maintained
and as free of security issues as can be realistically achieved. All that said,
it is sometimes better to take on a dependency than to implement the desired
functionality from scratch. This is absolutely a judgement call.
## Coding Guidelines
Before accepting changes, the code should be formatted using `cargo fmt` and all
lints discovered via `cargo clippy` should be addressed. The default lint level
is pedantic. If there is good reason, an individual lint may be allowed for a
specific block of code with `#[allow(clippy::<lint>)]`.
New applets must be Posix compliant. They can and should implement GNU or BSD extensions
to Posix if the extended behavior is in widespread enough to cause widespread shell
script failures if left unimplemented. Further extension is allowed under the
following conditions.
- the extended behavior does not conflict with Posix
- the extended behavior increases utility
- the extended behavior is in keeping with behavior of other applets and increases
consistency of behavior for the overall userland
### Unsafe
As a functional Unix userland exposes much low level functionality to the user, it
is unavoidable that there will be cases of `unsafe` in this codebase. Please limit
use of `unsafe` to those places where the desired functionality is not exposed via
Rust's std library. Blocks of `unsafe` should only encapsulate the desired calls,
and not contain logic etc.
Keep memory usage small be preferring pass by reference, use of techniques such as
bitflags and avoiding unneeded allocations.

697
LICENSE
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@ -1,28 +1,675 @@
-----------------------------------------------------------------------------
"THE BEER-WARE LICENSE" (Revision 42):
<jeang3nie@HitchHiker-Linux.org> wrote this program. As long as you retain
this notice you can do whatever you want with this stuff. If we meet some day,
and you think this stuff is worth it, you can buy me a beer in return.
-----------------------------------------------------------------------------
### GNU GENERAL PUBLIC LICENSE
88888b d888b 888b 88 8P 888888 88888b 888 888b 88 88 d888b 88
88 88 88 88 88`8b 88 88 88 88 88 88 88`8b 88 88 88 ` 88
88 88 88 88 88 88 88 88 88888P 88 88 88 88 88 88 88 88
88 88 88 88 88 `8b88 88 88 d8888888b 88 `8b88 88 88 , ""
88888P `888P 88 `888 88 88 88 `8b 88 `888 88 `888P 88
Version 3, 29 June 2007
nnnmmm
\||\ ;;;;%%%@@@@@@ \ //,
V|/ %;;%%%%%@@@@@@@@@@ ===Y//
68=== ;;;;%%%%%%@@@@@@@@@@@@ @Y
;Y ;;%;%%%%%%@@@@@@@@@@@@@@ Y
;Y ;;;+;%%%%%%@@@@@@@@@@@@@@@ Y
;Y__;;;+;%%%%%%@@@@@@@@@@@@@@i;;__Y
iiY"";; "uu%@@@@@@@@@@uu" @"";;;>
Y "UUUUUUUUU" @@
`; ___ _ @
`;. ,====\\=. .;'
``""""`==\\=='
`;=====
===
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consequence you may not convey it at all. For example, if you agree to
terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
#### 13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
#### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in
detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU General Public
License "or any later version" applies to it, you have the option of
following the terms and conditions either of that numbered version or
of any later version published by the Free Software Foundation. If the
Program does not specify a version number of the GNU General Public
License, you may choose any version ever published by the Free
Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU General Public License can be used, that proxy's public
statement of acceptance of a version permanently authorizes you to
choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
#### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
#### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
#### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
### How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands \`show w' and \`show c' should show the
appropriate parts of the General Public License. Of course, your
program's commands might be different; for a GUI interface, you would
use an "about box".
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU GPL, see <https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your
program into proprietary programs. If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library. If this is what you want to do, use the
GNU Lesser General Public License instead of this License. But first,
please read <https://www.gnu.org/licenses/why-not-lgpl.html>.

32
README.md
View File

@ -1,6 +1,7 @@
Contents
========
* [Introduction](#introduction)
* [Provided Commands](#provided_commands)
* [Scope](#scope)
* [Installation](#installation)
@ -15,6 +16,35 @@ the code aims to be robust. It's written in Rust, not C, for whatever that's
worth. Like Busybox it is a multi-call binary which is therefore able to share
code between applets, making for an overall smaller binary.
## Provided Commands
- base32
- base64
- basename
- bootstrap
- clear
- cut
- dirname
- echo
- false
- factor
- fold
- groups
- head
- hostname
- link
- mountpoint
- nologin
- nproc
- rev
- sleep
- shitbox
- sync
- true
- unlink
- which
- whoami
- yes
## Scope
*Shitbox* does not aim to supply an entire system of utilities, but rather a
subset of the most common Unix shell utilities. Things which are out of scope
@ -22,7 +52,7 @@ for the project include:
- Shells
- Network servers
- Kernel module handling utilities
- Anything requiring suid such as `su` or `sudo`
- Anything requiring suid or sgid bits such as `su` or `sudo`
The code aims to be portable across **Unix** variants, ie Linux and BSD, but not
MacOS or Windows. Development occurs on Linux, so if your OS is more exotic then
YMMV.