Commit c3630df6 authored by Miguel Ojeda's avatar Miguel Ojeda
Browse files

rust: samples: add `rust_print` example 



Add example to exercise the printing macros (`pr_*!`) introduced
in the previous patches.

Reviewed-by: default avatarFinn Behrens <me@kloenk.dev>
Reviewed-by: default avatarWei Liu <wei.liu@kernel.org>
Tested-by: default avatarSergio González Collado <sergio.collado@gmail.com>
Signed-off-by: default avatarMiguel Ojeda <ojeda@kernel.org>
parent fc6c7cac

samples/rust/Kconfig

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@@ -20,6 +20,16 @@ config SAMPLE_RUST_MINIMAL 


	  If unsure, say N.



config SAMPLE_RUST_PRINT

	tristate "Printing macros"

	help

	  This option builds the Rust printing macros sample.



	  To compile this as a module, choose M here:

	  the module will be called rust_print.



	  If unsure, say N.



config SAMPLE_RUST_HOSTPROGS

	bool "Host programs"

	help

samples/rust/Makefile

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# SPDX-License-Identifier: GPL-2.0



obj-$(CONFIG_SAMPLE_RUST_MINIMAL)		+= rust_minimal.o

obj-$(CONFIG_SAMPLE_RUST_PRINT)			+= rust_print.o



subdir-$(CONFIG_SAMPLE_RUST_HOSTPROGS)		+= hostprogs

samples/rust/rust_print.rs

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// SPDX-License-Identifier: GPL-2.0



//! Rust printing macros sample.



use kernel::pr_cont;

use kernel::prelude::*;



module! {

    type: RustPrint,

    name: b"rust_print",

    author: b"Rust for Linux Contributors",

    description: b"Rust printing macros sample",

    license: b"GPL",

}



struct RustPrint;



impl kernel::Module for RustPrint {

    fn init(_module: &'static ThisModule) -> Result<Self> {

        pr_info!("Rust printing macros sample (init)\n");



        pr_emerg!("Emergency message (level 0) without args\n");

        pr_alert!("Alert message (level 1) without args\n");

        pr_crit!("Critical message (level 2) without args\n");

        pr_err!("Error message (level 3) without args\n");

        pr_warn!("Warning message (level 4) without args\n");

        pr_notice!("Notice message (level 5) without args\n");

        pr_info!("Info message (level 6) without args\n");



        pr_info!("A line that");

        pr_cont!(" is continued");

        pr_cont!(" without args\n");



        pr_emerg!("{} message (level {}) with args\n", "Emergency", 0);

        pr_alert!("{} message (level {}) with args\n", "Alert", 1);

        pr_crit!("{} message (level {}) with args\n", "Critical", 2);

        pr_err!("{} message (level {}) with args\n", "Error", 3);

        pr_warn!("{} message (level {}) with args\n", "Warning", 4);

        pr_notice!("{} message (level {}) with args\n", "Notice", 5);

        pr_info!("{} message (level {}) with args\n", "Info", 6);



        pr_info!("A {} that", "line");

        pr_cont!(" is {}", "continued");

        pr_cont!(" with {}\n", "args");



        Ok(RustPrint)

    }

}



impl Drop for RustPrint {

    fn drop(&mut self) {

        pr_info!("Rust printing macros sample (exit)\n");

    }

}