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|
extern crate clap;
extern crate termion;
mod display;
mod os;
mod postgresql;
use clap::{App, Arg};
use std::env;
use std::io::{stdout, Write};
use std::thread;
use std::time::Duration;
use termion::input::TermRead;
use termion::raw::IntoRawMode;
pub struct PGTOP {
pub new: usize,
pub old: usize,
pub cpu: os::CPUSTAT,
}
fn move_to_end(line: u16) {
let mut stdout = stdout().into_raw_mode().unwrap();
write!(
stdout,
"{}{}",
termion::cursor::Goto(1, line),
termion::cursor::Show,
)
.unwrap();
}
fn main() {
let matches = App::new("pg_top")
.version("5.0.0")
.about("'top' for PostgreSQL")
.arg(
Arg::with_name("DELAY")
.help("set delay between screen updates")
.default_value("1")
.takes_value(true),
)
.arg(
Arg::with_name("COUNT")
.help("change number of displays to show")
.takes_value(true),
)
.get_matches();
let delay = matches.value_of("DELAY").unwrap().parse::<u64>().unwrap();
let infinite_loop = if matches.value_of("COUNT").is_none() {
true
} else {
false
};
let mut count = if matches.value_of("COUNT").is_none() {
1
} else {
matches.value_of("COUNT").unwrap().parse::<u64>().unwrap()
};
let mut conninfo = String::new();
// Host is required.
let pghost = if env::var("PGHOST").is_ok() {
env::var("PGHOST").unwrap()
} else {
String::from("/tmp,/var/run/postgresql")
};
conninfo.push_str("host=");
conninfo.push_str(&pghost);
// User is required.
let pguser = if env::var("PGUSER").is_ok() {
env::var("PGUSER").unwrap()
} else {
env::var("USER").unwrap()
};
conninfo.push_str(" user=");
conninfo.push_str(&pguser);
// Database is not required and will default to PGUSER.
if env::var("PGDATABASE").is_ok() {
conninfo.push_str(" database=");
env::var("PGDATABASE").unwrap();
}
// Port is not required.
if env::var("PGPORT").is_ok() {
conninfo.push_str(" port=");
env::var("PGPORT").unwrap();
}
let mut pg_top = PGTOP {
new: 1,
old: 0,
cpu: os::CPUSTAT {
stat: [[0; 5], [0; 5]],
},
};
let mut stdin = termion::async_stdin().keys();
let mut stdout = stdout().into_raw_mode().unwrap();
write!(stdout, "{}{}", termion::clear::All, termion::cursor::Hide).unwrap();
loop {
let mut client = postgresql::connect(&conninfo);
let mut processes = postgresql::get_processes(&mut client);
let terminal_size = termion::terminal_size().unwrap();
/* Process any input. */
let input = stdin.next();
if let Some(Ok(key)) = input {
match key {
termion::event::Key::Char('q') => {
move_to_end(terminal_size.1);
break;
}
_ => { /* */ }
}
}
/* Update the display. */
display::loadavg(terminal_size.0 as usize);
processes = display::process_summary(processes, terminal_size.0 as usize);
pg_top = display::stat_cpu(pg_top, terminal_size.0 as usize);
display::processes(processes, terminal_size.0 as usize);
write!(stdout, "{}", termion::clear::AfterCursor,).unwrap();
stdout.flush().unwrap();
if infinite_loop == false {
count = count - 1;
}
if count == 0 {
move_to_end(terminal_size.1);
break;
}
thread::sleep(Duration::from_secs(delay));
}
}
|
