fd/src/exec/command.rs

53 lines
1.6 KiB
Rust

use std::io;
use std::io::Write;
use std::process::Command;
use std::sync::Mutex;
use crate::error::print_error;
use crate::exit_codes::ExitCode;
/// Executes a command.
pub fn execute_command(
mut cmd: Command,
out_perm: &Mutex<()>,
enable_output_buffering: bool,
) -> ExitCode {
// Spawn the supplied command.
let output = if enable_output_buffering {
cmd.output()
} else {
// If running on only one thread, don't buffer output
// Allows for viewing and interacting with intermediate command output
cmd.spawn().and_then(|c| c.wait_with_output())
};
// Then wait for the command to exit, if it was spawned.
match output {
Ok(output) => {
// While this lock is active, this thread will be the only thread allowed
// to write its outputs.
let _lock = out_perm.lock().unwrap();
let stdout = io::stdout();
let stderr = io::stderr();
let _ = stdout.lock().write_all(&output.stdout);
let _ = stderr.lock().write_all(&output.stderr);
if output.status.code() == Some(0) {
ExitCode::Success
} else {
ExitCode::GeneralError
}
}
Err(ref why) if why.kind() == io::ErrorKind::NotFound => {
print_error(format!("Command not found: {:?}", cmd));
ExitCode::GeneralError
}
Err(why) => {
print_error(format!("Problem while executing command: {}", why));
ExitCode::GeneralError
}
}
}