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#![allow(dead_code)]
extern crate errno;
extern crate exec;
extern crate glob;
extern crate libc;
extern crate linefeed;
extern crate nix;
extern crate os_type;
extern crate regex;
extern crate sqlite;
extern crate time;
#[macro_use]
extern crate nom;
use std::collections::HashMap;
#[macro_use]
mod tools;
mod shell;
mod libs;
mod history;
mod builtins;
mod execute;
mod parsers;
pub fn line_to_cmds(line: &str) -> Vec<String> {
return parsers::parser_line::line_to_cmds(line);
}
pub fn line_to_tokens(line: &str) -> Vec<(String, String)> {
return parsers::parser_line::line_to_tokens(line);
}
pub fn run_command(line: &str) -> Result<String, &str> {
let mut envs = HashMap::new();
let cmd_line = tools::remove_envs_from_line(line, &mut envs);
let mut tokens = parsers::parser_line::line_to_tokens(&cmd_line);
if tokens.is_empty() {
return Ok(String::new());
}
let mut len = tokens.len();
if len > 1 && tokens[len - 1].1 == "&" {
tokens.pop();
len -= 1;
}
let mut redirect_from = String::new();
let has_redirect_from = tokens.iter().any(|x| x.1 == "<");
if has_redirect_from {
if let Some(idx) = tokens.iter().position(|x| x.1 == "<") {
tokens.remove(idx);
len -= 1;
if len >= idx + 1 {
redirect_from = tokens.remove(idx).1;
len -= 1;
} else {
return Err("cicada: invalid command: cannot get redirect from");
}
}
}
if len == 0 {
return Ok(String::new());
}
let (_, _, output) =
if len > 2 && (tokens[len - 2].1 == ">" || tokens[len - 2].1 == ">>") {
let append = tokens[len - 2].1 == ">>";
let redirect_to;
match tokens.pop() {
Some(x) => redirect_to = x.1,
None => {
return Err("cicada: redirect_to pop error");
}
}
tokens.pop();
execute::run_pipeline(
tokens,
redirect_from.as_str(),
redirect_to.as_str(),
append,
false,
false,
true,
Some(envs),
)
} else {
execute::run_pipeline(
tokens.clone(),
redirect_from.as_str(),
"",
false,
false,
false,
true,
Some(envs),
)
};
match output {
Some(x) => {
return Ok(String::from_utf8_lossy(&x.stdout).into_owned());
}
None => {
return Err("no output");
}
}
}