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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::dynamic_lib::DynamicLibrary;
use std::io::prelude::*;
use std::path::PathBuf;
use std::process::{ExitStatus, Command, Child, Output, Stdio};
fn add_target_env(cmd: &mut Command, lib_path: &str, aux_path: Option<&str>) {
// 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, PathBuf::from(p)),
None => {}
}
path.insert(0, PathBuf::from(lib_path));
// Add the new dylib search path var
let var = DynamicLibrary::envvar();
let newpath = DynamicLibrary::create_path(&path);
let newpath = newpath.to_str().unwrap().to_string();
cmd.env(var, &newpath);
}
pub struct Result {pub status: ExitStatus, 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 mut cmd = Command::new(prog);
cmd.args(args)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped());
add_target_env(&mut cmd, lib_path, aux_path);
for (key, val) in env {
cmd.env(&key, &val);
}
match cmd.spawn() {
Ok(mut process) => {
if let Some(input) = input {
process.stdin.as_mut().unwrap().write_all(input.as_bytes()).unwrap();
}
let Output { status, stdout, stderr } =
process.wait_with_output().unwrap();
Some(Result {
status: status,
out: String::from_utf8(stdout).unwrap(),
err: String::from_utf8(stderr).unwrap()
})
},
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<Child> {
let mut cmd = Command::new(prog);
cmd.args(args)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped());
add_target_env(&mut cmd, lib_path, aux_path);
for (key, val) in env {
cmd.env(&key, &val);
}
match cmd.spawn() {
Ok(mut process) => {
if let Some(input) = input {
process.stdin.as_mut().unwrap().write_all(input.as_bytes()).unwrap();
}
Some(process)
},
Err(..) => None
}
}
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