- 子进程
子进程
process::Output
结构体表示已结束的子进程(child process)的输出,而 process::Command
结构体是一个进程创建者(process builder)。
use std::process::Command;
fn main() {
let output = Command::new("rustc")
.arg("--version")
.output().unwrap_or_else(|e| {
panic!("failed to execute process: {}", e)
});
if output.status.success() {
let s = String::from_utf8_lossy(&output.stdout);
print!("rustc succeeded and stdout was:\n{}", s);
} else {
let s = String::from_utf8_lossy(&output.stderr);
print!("rustc failed and stderr was:\n{}", s);
}
}
(再试试前面的例子,给rustc
命令传入一个错误的标志)