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| -rw-r--r-- | src/libstd/process.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/libstd/process.rs b/src/libstd/process.rs index 39692836866..ad64ed66e8e 100644 --- a/src/libstd/process.rs +++ b/src/libstd/process.rs @@ -381,6 +381,39 @@ impl fmt::Debug for ChildStderr { /// /// let hello = output.stdout; /// ``` +/// +/// `Command` can be reused to spawn multiple processes. The builder methods +/// change the command without needing to immediately spawn the process. +/// +/// ```no_run +/// use std::process::Command; +/// +/// let mut echo_hello = Command::new("sh"); +/// echo_hello.arg("-c") +/// .arg("echo hello"); +/// let hello_1 = echo_hello.output().expect("failed to execute process"); +/// let hello_2 = echo_hello.output().expect("failed to execute process"); +/// ``` +/// +/// Similarly, you can call builder methods after spawning a process and then +/// spawn a new process with the modified settings. +/// +/// ```no_run +/// use std::process::Command; +/// +/// let mut list_dir = Command::new("ls"); +/// +/// // Execute `ls` in the current directory of the program. +/// list_dir.status().expect("process failed to execute"); +/// +/// println!(""); +/// +/// // Change `ls` to execute in the root directory. +/// list_dir.current_dir("/"); +/// +/// // And then execute `ls` again but in the root directory. +/// list_dir.status().expect("process failed to execute"); +/// ``` #[stable(feature = "process", since = "1.0.0")] pub struct Command { inner: imp::Command, |