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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::os;
use std::str;
use std::io::process::{ProcessExit, Command, Process, ProcessOutput};
use std::dynamic_lib::DynamicLibrary;
fn target_env(lib_path: &str, aux_path: Option<&str>) -> Vec<(String, String)> {
// Need to be sure to put both the lib_path and the aux path in the dylib
// search path for the child.
let mut path = DynamicLibrary::search_path();
match aux_path {
Some(p) => path.insert(0, Path::new(p)),
None => {}
}
path.insert(0, Path::new(lib_path));
// Remove the previous dylib search path var
let var = DynamicLibrary::envvar();
let mut env: Vec<(String,String)> = os::env();
match env.iter().position(|&(ref k, _)| k.as_slice() == var) {
Some(i) => { env.remove(i); }
None => {}
}
// Add the new dylib search path var
let newpath = DynamicLibrary::create_path(path.as_slice());
let newpath = str::from_utf8(newpath.as_slice()).unwrap().to_string();
env.push((var.to_string(), newpath));
return env;
}
pub struct Result {pub status: ProcessExit, pub out: String, pub err: String}
pub fn run(lib_path: &str,
prog: &str,
aux_path: Option<&str>,
args: &[String],
env: Vec<(String, String)> ,
input: Option<String>) -> Option<Result> {
let env = env.clone().append(target_env(lib_path, aux_path).as_slice());
match Command::new(prog).args(args).env(env.as_slice()).spawn() {
Ok(mut process) => {
for input in input.iter() {
process.stdin.get_mut_ref().write(input.as_bytes()).unwrap();
}
let ProcessOutput { status, output, error } =
process.wait_with_output().unwrap();
Some(Result {
status: status,
out: str::from_utf8(output.as_slice()).unwrap().to_string(),
err: str::from_utf8(error.as_slice()).unwrap().to_string()
})
},
Err(..) => None
}
}
pub fn run_background(lib_path: &str,
prog: &str,
aux_path: Option<&str>,
args: &[String],
env: Vec<(String, String)> ,
input: Option<String>) -> Option<Process> {
let env = env.clone().append(target_env(lib_path, aux_path).as_slice());
match Command::new(prog).args(args).env(env.as_slice()).spawn() {
Ok(mut process) => {
for input in input.iter() {
process.stdin.get_mut_ref().write(input.as_bytes()).unwrap();
}
Some(process)
},
Err(..) => None
}
}
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