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13 commits

Author SHA1 Message Date
e96ba1dca1 cargo: Add some Cargo metadata
Some checks failed
ci/woodpecker/push/woodpecker Pipeline failed
Add a homepage URL and a the readme to sysvmq's Cargo.toml.
2023-12-08 01:22:33 +01:00
a29aa7971d readme: Add an example to the readme 2023-12-08 01:22:33 +01:00
9513b2b3d5 cargo: Add staging registry
In order to test things add the config for the staging registry.
2023-12-08 01:22:33 +01:00
8b1a84ba53 sysvmq: Update rust edition to 2021
Update rust edition to 2021.
2023-12-08 01:22:33 +01:00
39b8d6ace8 sysvmq: Implement send and recv and refactor
Implement sending to and receiving from SysV IPC message queues. While
at it refactor the whole library. Write documentation for the sysvmq
library.
2023-12-08 01:22:33 +01:00
1f7c405705 cargo: Update env_logger to latest version
Update the env_logger dependency to the latest version.
2023-12-08 01:22:33 +01:00
eedbbedb6a cargo: Update nix to the latest version
Update the sysvmq dependency nix to the latest version.
2023-12-08 01:22:33 +01:00
ea34691117 cargo: Force all annoying checks
Deny warnings, so that those have to be fixed and enable 'pedantic',
'nursery' and 'cargo' clippy checks.
2023-12-08 01:22:33 +01:00
d6b82f0e72 clippy: Fix several clippy issues
In order to enable several clippy lint groups fix several findings.
2023-12-08 01:22:33 +01:00
21bc394c58 sysvmq: Create a rudimentary readme file
Create a rudimentary readme file.
2023-12-08 01:22:33 +01:00
e9982da560 cargo: Update clap to the latest version
Update to latest clap version.
2023-12-08 01:22:33 +01:00
5339ffa6c0 cargo: Update non SemVer breaking dependencies
Update all dependencies that should not break SemVer.
2023-12-08 01:22:33 +01:00
18e3ab2a04 ci: Add config for Woodpecker CI
Some checks failed
ci/woodpecker/push/woodpecker Pipeline failed
To have some rudimentary tests create a config for Woodpecker CI.
2023-12-08 01:22:33 +01:00
17 changed files with 880 additions and 367 deletions

10
.cargo/config Normal file
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@ -0,0 +1,10 @@
[target.'cfg(feature = "cargo-clippy")']
rustflags = [
"-Dwarnings",
"-Dclippy::pedantic",
"-Dclippy::nursery",
"-Dclippy::cargo",
]
[registries]
staging = { index = "https://github.com/rust-lang/staging.crates.io-index" }

6
.woodpecker.yml Normal file
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@ -0,0 +1,6 @@
pipeline:
checkmate:
group: default
image: rust_full
commands:
- cargo checkmate

18
CHANGELOG.md Normal file
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@ -0,0 +1,18 @@
# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a
Changelog](https://keepachangelog.com/en/1.0.0/), and this project
adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Changed
- Update to the latext version of **env_logger**.
- Update to the latext version of **nix**.
- Fix several clippy findings in preperation to enable several lint
groups.
- Update to the latest version of **clap**.
- Update all dependencies that should not break SemVer.

538
Cargo.lock generated
View file

@ -4,47 +4,108 @@ version = 3
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checksum = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59"
checksum = "e96b79aaa137db8f61e26363a0c9b47d8b4ec75da28b7d1d614c2303e232408b"
dependencies = [
"proc-macro2",
"quote",
"unicode-xid",
"unicode-ident",
]
[[package]]
@ -336,36 +424,27 @@ dependencies = [
[[package]]
name = "termcolor"
version = "1.1.2"
version = "1.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
checksum = "6093bad37da69aab9d123a8091e4be0aa4a03e4d601ec641c327398315f62b64"
dependencies = [
"winapi-util",
]
[[package]]
name = "textwrap"
version = "0.14.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
dependencies = [
"unicode-width",
]
[[package]]
name = "thiserror"
version = "1.0.30"
version = "1.0.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
checksum = "1177e8c6d7ede7afde3585fd2513e611227efd6481bd78d2e82ba1ce16557ed4"
dependencies = [
"thiserror-impl",
]
[[package]]
name = "thiserror-impl"
version = "1.0.30"
version = "1.0.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
checksum = "10712f02019e9288794769fba95cd6847df9874d49d871d062172f9dd41bc4cc"
dependencies = [
"proc-macro2",
"quote",
@ -373,54 +452,70 @@ dependencies = [
]
[[package]]
name = "time"
version = "0.1.44"
name = "unicode-ident"
version = "1.0.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
[[package]]
name = "utf8parse"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
[[package]]
name = "wasm-bindgen"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7706a72ab36d8cb1f80ffbf0e071533974a60d0a308d01a5d0375bf60499a342"
dependencies = [
"libc",
"wasi",
"winapi",
"cfg-if",
"wasm-bindgen-macro",
]
[[package]]
name = "unicase"
version = "2.6.0"
name = "wasm-bindgen-backend"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
checksum = "5ef2b6d3c510e9625e5fe6f509ab07d66a760f0885d858736483c32ed7809abd"
dependencies = [
"version_check",
"bumpalo",
"log",
"once_cell",
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-shared",
]
[[package]]
name = "unicode-segmentation"
version = "1.8.0"
name = "wasm-bindgen-macro"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
checksum = "dee495e55982a3bd48105a7b947fd2a9b4a8ae3010041b9e0faab3f9cd028f1d"
dependencies = [
"quote",
"wasm-bindgen-macro-support",
]
[[package]]
name = "unicode-width"
version = "0.1.9"
name = "wasm-bindgen-macro-support"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
dependencies = [
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-backend",
"wasm-bindgen-shared",
]
[[package]]
name = "unicode-xid"
version = "0.2.2"
name = "wasm-bindgen-shared"
version = "0.2.87"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
[[package]]
name = "version_check"
version = "0.9.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
[[package]]
name = "wasi"
version = "0.10.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
[[package]]
name = "winapi"
@ -440,9 +535,9 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
[[package]]
name = "winapi-util"
version = "0.1.5"
version = "0.1.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
checksum = "f29e6f9198ba0d26b4c9f07dbe6f9ed633e1f3d5b8b414090084349e46a52596"
dependencies = [
"winapi",
]
@ -452,3 +547,78 @@ name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
dependencies = [
"windows-targets",
]
[[package]]
name = "windows-sys"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
dependencies = [
"windows-targets",
]
[[package]]
name = "windows-targets"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
dependencies = [
"windows_aarch64_gnullvm",
"windows_aarch64_msvc",
"windows_i686_gnu",
"windows_i686_msvc",
"windows_x86_64_gnu",
"windows_x86_64_gnullvm",
"windows_x86_64_msvc",
]
[[package]]
name = "windows_aarch64_gnullvm"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
[[package]]
name = "windows_aarch64_msvc"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
[[package]]
name = "windows_i686_gnu"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
[[package]]
name = "windows_i686_msvc"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
[[package]]
name = "windows_x86_64_gnu"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
[[package]]
name = "windows_x86_64_gnullvm"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
[[package]]
name = "windows_x86_64_msvc"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"

View file

@ -11,13 +11,13 @@ keywords = ["message_queue", "mq", "mqueue", "queue"]
categories = ["command-line-utilities"]
[dependencies]
anyhow = "1.0"
clap = "3.0.0-beta.2"
posixmq = "1.0"
chrono = "0.4"
anyhow = "1.0.51"
chrono = "0.4.31"
clap = { version = "4.4.6", features = ["derive"] }
env_logger = "0.10.0"
humantime = "2.1"
log = "0.4"
env_logger = "0.8"
log = "0.4.14"
posixmq = "1.0.0"
sysvmq = { path = "sysvmq" }
[workspace]

View file

@ -1,5 +1,5 @@
use anyhow::Result;
use clap::{crate_authors, crate_version, AppSettings, Parser};
use clap::{ArgAction, Parser};
mod posix;
mod sysv;
@ -34,15 +34,13 @@ enum SysvCommand {
#[derive(Debug, Parser)]
#[clap(
version = crate_version!(),
author = crate_authors!(", "),
setting = AppSettings::SubcommandRequiredElseHelp,
global_setting = AppSettings::PropagateVersion,
global_setting = AppSettings::InferSubcommands,
arg_required_else_help = true,
infer_subcommands = true,
subcommand_required = true
)]
struct Opts {
/// Produce verbose output, multiple -v options increase the verbosity (max. 3)
#[clap(short, long, global = true, parse(from_occurrences))]
#[clap(short, long, global = true, action = ArgAction::Count)]
verbose: u32,
/// Backend to be used
#[clap(subcommand)]

View file

@ -22,17 +22,13 @@ pub struct Create {
}
fn msgsize_default() -> usize {
match fs::read_to_string("/proc/sys/fs/mqueue/msgsize_default") {
Ok(m) => m.trim().parse::<usize>().expect("can never fail"),
_ => 8192,
}
fs::read_to_string("/proc/sys/fs/mqueue/msgsize_default")
.map_or(8192, |m| m.trim().parse::<usize>().expect("can never fail"))
}
fn msg_default() -> usize {
match fs::read_to_string("/proc/sys/fs/mqueue/msg_default") {
Ok(m) => m.trim().parse::<usize>().expect("can never fail"),
_ => 10,
}
fs::read_to_string("/proc/sys/fs/mqueue/msg_default")
.map_or(10, |m| m.trim().parse::<usize>().expect("can never fail"))
}
impl Create {

View file

@ -14,12 +14,13 @@ pub struct List {
impl List {
pub fn run(&self) -> Result<()> {
match self.all {
false => println!("Name"),
true => println!(
if self.all {
println!(
"{0: <10} {1: <10} {2: <12} {3: <26} {4: <26}",
"Name", "Size", "Permissions", "Modified", "Accessed",
),
);
} else {
println!("Name");
}
for mq in fs::read_dir("/dev/mqueue")? {

View file

@ -36,7 +36,7 @@ fn print_message(priority: u32, length: usize, timestamp: bool, msg: &str) {
println!("{}", Local::now());
}
println!("{}", msg);
println!("{msg}");
}
impl Recv {

View file

@ -3,7 +3,8 @@ use clap::Parser;
use log::info;
use sysvmq::SysvMq;
/// Create a SysV message queue
#[allow(clippy::doc_markdown)]
/// Create a SysV IPC message queue
#[derive(Debug, Parser)]
pub struct Create {
/// Permissions (octal) to create the queue with (default: 0644)

View file

@ -17,8 +17,8 @@ pub struct Info {
}
fn print_line(line: &str) {
for field in line.split_whitespace().collect::<Vec<&str>>() {
print!("{0: <10}", field);
for field in line.split_whitespace() {
print!("{field: <10}");
}
println!();

View file

@ -10,10 +10,11 @@ use std::{
pub struct List {}
impl List {
#[allow(clippy::unused_self)]
pub fn run(&self) -> Result<()> {
for line in BufReader::new(File::open("/proc/sysvipc/msg")?).lines() {
for field in line?.split_whitespace().collect::<Vec<&str>>() {
print!("{0: <10}", field);
for field in line?.split_whitespace() {
print!("{field: <10}");
}
println!();

44
sysvmq/CHANGELOG.md Normal file
View file

@ -0,0 +1,44 @@
# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a
Changelog](https://keepachangelog.com/en/1.0.0/), and this project
adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [Unreleased]
### Added
- Basic tests to create, send, receive and delete a message queue as
well as changing the mode of a queue.
- The functions `SysvMq::stat()`, `SysvMq::info()`,
`SysvMq::msg_stat()` and `SysvMq::msg_info()` are added to receive
parameters of a queue.
- The function `new()` passes now a key which is used for the new
message queue.
- A basic test to test the happy path of a queue.
- The function `get()` to gather facts from a message queue.
- The function `set()` to set facts of a message queue.
- The function `create()` to create a message queue.
- The functions `send()` and `SysvMq::send()` to send messages to a
queue.
- The functions `recv()` and `SysvMq::recv()` to receive messages from
a queue.
- The function `SysvMq::delete()` to delete a queue.
### Changed
- The function `SysvMq::mode()` now also updates the message queue
accordingly.
- Remove `PhantomData` from the `SysvMq` struct.
- The function `SysvMq::create()` is replaced by `SysvMq::new()`.
- Remove generic type for `SysvMq`.
- Rename `unlink_id()` to `delete()`.
- Update to the latest verscion of `nix`.
- Fix several clippy findings in preperation to enable several lint
groups.
### Removed
- The function `id_from_key()` was removed.

View file

@ -1,12 +1,17 @@
[package]
name = "sysvmq"
version = "0.1.0"
edition = "2018"
edition = "2021"
authors = ["finga <mqrs@onders.org>"]
repository = "https://git.onders.org/finga/mqrs"
license = "GPL-3.0-or-later"
description = "A simple API for SysV IPC message queues."
homepage = "https://git.onders.org/finga/mqrs/sysvmq"
readme = "README.md"
keywords = ["message_queue", "mq", "mqueue", "queue", "sysv", "ipc"]
categories = ["os"]
[dependencies]
libc = "0.2.98"
thiserror = "1.0.26"
nix = "0.21.0"
nix = "0.27.1"

19
sysvmq/README.md Normal file
View file

@ -0,0 +1,19 @@
# Sysvmq
This library provides a convenient and easy usable API for SysV IPC
message queues.
```rust
use sysvmq::{SysvMq, SysvMqError};
fn example() -> Result<(), SysvMqError> {
let mut mq = SysvMq::new(0)?;
let mut buf = [0u8; 11];
mq.send(b"hello queue")?;
mq.recv(&mut buf)?;
mq.delete()?;
Ok(())
}
```

View file

@ -1,179 +1,355 @@
#![allow(clippy::doc_markdown)]
//! This library provides a convenient API to SysV IPC message queues.
//!
//! # Example
//!
//! ```rust
//! use sysvmq::{SysvMq, SysvMqError};
//!
//! fn example() -> Result<(), SysvMqError> {
//! let mut mq = SysvMq::new(0)?;
//! let mut buf = [0u8; 11];
//!
//! mq.send(b"hello queue")?;
//! mq.recv(&mut buf)?;
//! mq.delete()?;
//!
//! Ok(())
//! }
//! ```
use libc::{
msgctl, msgget, msginfo, msqid_ds, IPC_CREAT, IPC_EXCL, IPC_INFO, IPC_NOWAIT, IPC_PRIVATE,
IPC_RMID, IPC_SET, IPC_STAT, MSG_COPY, MSG_EXCEPT, MSG_INFO, MSG_NOERROR, MSG_STAT,
c_void, msgctl, msgget, msgrcv, msgsnd, msqid_ds, IPC_CREAT, IPC_NOWAIT, IPC_RMID, IPC_SET,
};
pub use libc::{IPC_INFO, IPC_STAT, MSG_INFO, MSG_STAT};
use nix::errno::{errno, Errno};
use std::{marker::PhantomData, mem::MaybeUninit, ptr};
use std::{convert::TryFrom, mem::MaybeUninit, ptr};
use thiserror::Error;
#[derive(Debug, Error)]
/// An enum containing all errors
pub enum SysvMqError {
#[error("SysV message queue: {0}")]
ErrnoError(&'static str),
#[error("Cannot convert integer")]
From(#[from] std::num::TryFromIntError),
}
/// IPC bit flags
#[repr(i32)]
pub enum Flags {
/// Create key if key does not exist.
CreateKey = IPC_CREAT,
/// Fail if key exists.
Exclusive = IPC_EXCL,
/// Return error on wait.
NoWait = IPC_NOWAIT,
/// No error if message is too big.
NoError = MSG_NOERROR,
/// Receive any message except of specified type.
Except = MSG_EXCEPT,
/// Copy (not remove) all queue messages.
Copy = MSG_COPY,
/// Private key (Special key value).
Private = IPC_PRIVATE,
/// Low level function to create a new SysV IPC message queue.
///
/// # Example
///
/// ```rust
/// # use sysvmq::delete;
/// use sysvmq::{create, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_id = create(0, 0o644)?;
/// println!("new queue: {mq_id}");
/// # delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when the queue cannot be created.
pub fn create(key: i32, mode: i32) -> Result<i32, SysvMqError> {
let mq = unsafe { msgget(key, IPC_CREAT | mode) };
match mq {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
id => Ok(id),
}
}
/// Commands for `msgctl()`
#[repr(i32)]
pub enum ControlCommands {
/// Remove identifier (Control command for `msgctl`, `semctl`, and `shmctl`).
Remove = IPC_RMID,
/// Set `ipc_perm` options (Control command for `msgctl`, `semctl`, and `shmctl`).
SetPerm = IPC_SET,
/// Get `ipc_perm` options (Control command for `msgctl`, `semctl`, and `shmctl`).
GetPerm = IPC_STAT,
/// See ipcs (Control command for `msgctl`, `semctl`, and `shmctl`).
IpcInfo = IPC_INFO,
/// IPCS control command.
Stat = MSG_STAT,
/// IPCS control command.
MsgInfo = MSG_INFO,
/// Low level function to send a message to a SysV IPC message queue.
///
/// # Example
///
/// ```rust
/// # use sysvmq::{delete};
/// use sysvmq::{create, send, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_id = create(0, 0o644)?;
/// let msg = b"hello queue";
/// send(mq_id, msg, 0)?;
/// # delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when the message cannot be sent to the queue.
pub fn send(id: i32, msg: &[u8], mask: i32) -> Result<(), SysvMqError> {
match unsafe { msgsnd(id, msg.as_ptr().cast::<c_void>(), msg.len(), mask) } {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
_ => Ok(()),
}
}
pub fn unlink_id(id: i32) -> Result<(), SysvMqError> {
let res = unsafe {
msgctl(
id,
ControlCommands::Remove as i32,
ptr::null::<msqid_ds>() as *mut msqid_ds,
)
/// Low level function to receive a message from a SysV IPC message
/// queue.
///
/// # Example
///
/// ```rust
/// # use sysvmq::{delete, send};
/// use sysvmq::{create, recv, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_mask = 0o644;
/// let mq_id = create(0, mq_mask)?;
/// let mut buf = [0u8; 32];
/// # let msg = b"hello queue";
/// # send(mq_id, msg, 0)?;
/// recv(mq_id, &mut buf, mq_mask)?;
/// println!("received message: {:?}", buf);
/// # delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when the message cannot be received from the
/// queue.
pub fn recv(id: i32, msg: &mut [u8], mask: i32) -> Result<(), SysvMqError> {
match unsafe { msgrcv(id, msg.as_mut_ptr().cast::<c_void>(), msg.len(), 0, mask) } {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
_ => Ok(()),
}
}
/// Low level function to get parameters of a SysV IPC message queue.
///
/// # Example
///
/// ```rust
/// # use sysvmq::{delete};
/// use sysvmq::{create, get, IPC_STAT, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_id = create(0, 0o644)?;
/// let mq_stat = get(mq_id, IPC_STAT)?;
/// println!("received message: {:?}", mq_stat);
/// # delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when the parameters cannot be gathered.
pub fn get(id: i32, cmd: i32) -> Result<msqid_ds, SysvMqError> {
let mut ipc_info = MaybeUninit::<msqid_ds>::uninit();
let ret;
let ipc_info = unsafe {
ret = msgctl(id, cmd, ipc_info.as_mut_ptr());
ipc_info.assume_init()
};
match ret {
0 => Ok(ipc_info),
_ => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
}
}
/// Low level function to set parameters of a SysV IPC message queue.
///
/// # Example
///
/// ```rust
/// # use sysvmq::{delete};
/// use sysvmq::{create, get, IPC_STAT, set, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_id = create(0, 0o644)?;
/// let mut mq_stat = get(mq_id, IPC_STAT)?;
/// mq_stat.msg_perm.mode = 0o666;
/// set(mq_id, &mut mq_stat)?;
/// # delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when the parameters cannot be set.
pub fn set(id: i32, data: &mut msqid_ds) -> Result<(), SysvMqError> {
match unsafe { msgctl(id, IPC_SET, data) } {
0 => Ok(()),
_ => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
}
}
/// Low level function to delete a SysV IPC message queue.
///
/// # Example
///
/// ```rust
/// use sysvmq::{create, delete, SysvMqError};
///
/// fn main() -> Result<(), SysvMqError> {
/// let mq_id = create(0, 0o644)?;
/// delete(mq_id)?;
///
/// Ok(())
/// }
/// ```
///
/// # Errors
///
/// Return `SysvMqError` when no queue with the given key can be
/// found.
pub fn delete(id: i32) -> Result<(), SysvMqError> {
let res = unsafe { msgctl(id, IPC_RMID, ptr::null::<msqid_ds>().cast_mut()) };
match res {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
_ => Ok(()),
}
}
pub fn id_from_key(key: i32) -> Result<i32, SysvMqError> {
let id = unsafe { msgget(key, 0) };
match id {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
id => Ok(id),
}
}
pub fn ipc_info(id: i32) -> Result<(), SysvMqError> {
let mut msginfo = MaybeUninit::<msginfo>::uninit();
unsafe {
msgctl(
id,
ControlCommands::IpcInfo as i32,
msginfo.as_mut_ptr() as *mut msqid_ds,
);
}
let msginfo = unsafe { msginfo.assume_init() };
println!("info: {:?}", msginfo);
Ok(())
}
pub fn stat_info(id: i32) -> Result<(), SysvMqError> {
let mut msginfo = MaybeUninit::<msqid_ds>::uninit();
unsafe {
msgctl(id, ControlCommands::Stat as i32, msginfo.as_mut_ptr());
}
let msginfo = unsafe { msginfo.assume_init() };
println!("info: {:?}", msginfo);
Ok(())
}
pub fn msg_info(id: i32) -> Result<(), SysvMqError> {
let mut msginfo = MaybeUninit::<msginfo>::uninit();
unsafe {
msgctl(
id,
ControlCommands::MsgInfo as i32,
msginfo.as_mut_ptr() as *mut msqid_ds,
);
}
let msginfo = unsafe { msginfo.assume_init() };
println!("info: {:?}", msginfo);
Ok(())
}
pub struct SysvMq<T> {
pub id: i32,
#[derive(Clone, Debug)]
/// Struct representation of a Message Queue
pub struct SysvMq {
pub key: i32,
message_mask: i32,
mode: i32,
types: PhantomData<T>,
pub id: i32,
pub mask: i32,
pub mode: i32,
}
impl<T> SysvMq<T> {
pub fn create(&mut self, key: i32) -> Result<&Self, SysvMqError> {
self.key = key;
self.id = unsafe { msgget(self.key, Flags::CreateKey as i32 | self.mode) };
match self.id {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
_ => Ok(self),
}
}
pub fn open(mut self, key: i32) -> Result<Self, SysvMqError> {
self.key = key;
self.id = unsafe { msgget(self.key, self.mode) };
match self.id {
-1 => Err(SysvMqError::ErrnoError(Errno::from_i32(errno()).desc())),
_ => Ok(self),
}
}
pub fn mode(&mut self, mode: i32) -> &Self {
self.mode = mode;
self
}
pub fn nonblocking(&mut self) -> &Self {
self.message_mask |= Flags::NoWait as i32;
self
}
pub fn new() -> Self {
SysvMq {
id: -1,
key: 0,
message_mask: 0,
mode: 0o644,
types: PhantomData,
}
}
}
impl<T> Default for SysvMq<T> {
impl Default for SysvMq {
fn default() -> Self {
Self::new()
Self {
key: 0,
id: -1,
mask: 0,
mode: 0o644,
}
}
}
impl SysvMq {
/// Create a new message SysV IPC message queue with the given
/// key.
///
/// # Errors
///
/// Return `SysvMqError` when the queue cannot be created.
pub fn new(key: i32) -> Result<Self, SysvMqError> {
let mut mq = Self::default();
mq.key = key;
mq.id = create(mq.key, mq.mode)?;
Ok(mq)
}
/// Open an existing SysV IPC message queye with the given key.
///
/// # Errors
///
/// Return `SysvMqError` when the queue cannot be opened.
pub fn open(key: i32, id: i32) -> Result<Self, SysvMqError> {
let mut mq = Self::default();
mq.key = key;
mq.id = id;
mq.mode = i32::from(get(mq.id, IPC_STAT)?.msg_perm.mode);
Ok(mq)
}
/// Set the mode of a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the mode of the queue cannot be set.
pub fn mode(&mut self, mode: i32) -> Result<(), SysvMqError> {
self.mode = mode;
let mut stats = get(self.id, IPC_STAT)?;
stats.msg_perm.mode = u16::try_from(self.mode)?;
set(self.id, &mut stats)
}
/// Set the mask of a SysV IPC message queue to nonblocking
/// (`IPC_NOWAIT`).
pub fn nonblocking(&mut self) {
self.mask |= IPC_NOWAIT;
}
/// Send a message to a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the message cannot be sent to the queue.
pub fn send(&mut self, msg: &[u8]) -> Result<(), SysvMqError> {
send(self.id, msg, self.mask)
}
/// Receive a message from a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the message cannot be received from the
/// queue.
pub fn recv(&mut self, msg: &mut [u8]) -> Result<(), SysvMqError> {
recv(self.id, msg, self.mask)
}
/// Receive stats from a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the stats cannot be gathered from
/// the queue.
pub fn stat(&self) -> Result<msqid_ds, SysvMqError> {
get(self.id, IPC_STAT)
}
/// Receive info from a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the info cannot be gathered from the
/// queue.
pub fn info(&self) -> Result<msqid_ds, SysvMqError> {
get(self.id, IPC_INFO)
}
/// Receive message stats from a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the message stats cannot be gathered
/// from the queue.
pub fn msg_stat(&self) -> Result<msqid_ds, SysvMqError> {
get(self.id, MSG_STAT)
}
/// Receive message info from a SysV IPC message queue.
///
/// # Errors
///
/// Return `SysvMqError` when the message info cannot be gathered
/// from the queue.
pub fn msg_info(&self) -> Result<msqid_ds, SysvMqError> {
get(self.id, MSG_INFO)
}
/// Delete an existing SysV IPC message queue.
///
/// # Errors
///
/// Return an `SysvMqError` when no queue with the given key can be
/// found.
pub fn delete(&mut self) -> Result<(), SysvMqError> {
delete(self.id)
}
}

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use sysvmq::SysvMq;
#[test]
fn new_send_recv_delete() {
let mut mq = SysvMq::new(0).expect("could not create SysV message queue with key 0");
let msg = b"this is a test";
let mut buf = [0u8; 14];
mq.send(msg)
.expect("could not send message to SysV message queue");
mq.recv(&mut buf)
.expect("could not receive message from SysV message queue");
mq.delete().expect("could not destroy SysV message queue");
assert_eq!(msg, &buf);
}
#[test]
fn separate_send_recv_clone() {
let mut sender = SysvMq::new(0).expect("could not create SysV message queue with key 0");
let mut receiver = sender.clone();
let msg = b"this is another test";
let mut buf = [0u8; 20];
sender
.send(msg)
.expect("could not send message to SysV message queue");
receiver
.recv(&mut buf)
.expect("could not receive message from SysV message queue");
sender
.delete()
.expect("could not destroy SysV message queue");
assert_eq!(msg, &buf);
}
#[test]
fn separate_send_recv_open() {
let mut sender = SysvMq::new(0).expect("could not create SysV message queue with key 0");
let mut receiver = SysvMq::open(sender.key, sender.id)
.expect("could not create second handle to SysV message queue");
let msg = b"this is another test";
let mut buf = [0u8; 20];
sender
.send(msg)
.expect("could not send message to SysV message queue");
receiver
.recv(&mut buf)
.expect("could not receive message from SysV message queue");
sender
.delete()
.expect("could not destroy SysV message queue");
assert_eq!(msg, &buf);
}
#[test]
fn change_mode() {
let mut mq = SysvMq::new(0).expect("could not create SysV message queue with key 0");
let init_stats = mq
.stat()
.expect("could not get stats from SysV message queue");
mq.mode(0o666)
.expect("could not set mode of SysV message queue");
let new_stats = mq
.stat()
.expect("could not get stats from SysV message queue");
mq.delete().expect("could not destroy SysV message queue");
assert_eq!(0o644, init_stats.msg_perm.mode);
assert_eq!(0o666, new_stats.msg_perm.mode);
}