54 lines
1.3 KiB
Rust
54 lines
1.3 KiB
Rust
use anyhow::Result;
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use clap::Parser;
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use std::{
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fs::File,
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io::{BufRead, BufReader},
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};
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/// Print information about an existing message queue
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#[derive(Debug, Parser)]
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pub struct Info {
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/// Id of the queue
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#[clap(short, long, required_unless_present_any = &["key"], conflicts_with = "key")]
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id: Option<i32>,
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/// Key of the queue
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#[clap(short, long, required_unless_present_any = &["id"], conflicts_with = "id")]
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key: Option<i32>,
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}
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fn print_line(line: &str) {
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for field in line.split_whitespace().collect::<Vec<&str>>() {
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print!("{0: <10}", field);
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}
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println!();
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}
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impl Info {
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pub fn run(&self) -> Result<()> {
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let mut lines = BufReader::new(File::open("/proc/sysvipc/msg")?).lines();
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print_line(&lines.nth(0).unwrap_or(Ok(String::new()))?);
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for line in lines {
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let line = line?;
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if let Some(id) = self.id {
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if id == line.split_whitespace().collect::<Vec<&str>>()[1].parse::<i32>()? {
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print_line(&line);
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break;
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}
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} else if let Some(key) = self.key {
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if key == line.split_whitespace().collect::<Vec<&str>>()[0].parse::<i32>()? {
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print_line(&line);
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break;
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}
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}
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}
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Ok(())
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}
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}
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