From 1ec7a697328fb10e7135b87557ff0a5ea702dd8d Mon Sep 17 00:00:00 2001 From: Alex Crichton Date: Thu, 16 Apr 2015 09:44:05 -0700 Subject: std: Add an unstable method Child::id This commits adds a method to the `std::process` module to get the process identifier of the child as a `u32`. On Windows the underlying identifier is already a `u32`, and on Unix the type is typically defined as `c_int` (`i32` for almost all our supported platforms), but the actually pid is normally a small positive number. Eventually we may add functions to load information about a process based on its identifier or the ability to terminate a process based on its identifier, but for now this function should enable this sort of functionality to exist outside the standard library. --- src/libstd/process.rs | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'src/libstd/process.rs') diff --git a/src/libstd/process.rs b/src/libstd/process.rs index 61398e16ba0..ae9316ddd62 100644 --- a/src/libstd/process.rs +++ b/src/libstd/process.rs @@ -456,6 +456,12 @@ impl Child { unsafe { self.handle.kill() } } + /// Returns the OS-assigned process identifier associated with this child. + #[unstable(feature = "process_id", reason = "api recently added")] + pub fn id(&self) -> u32 { + self.handle.id() + } + /// Waits for the child to exit completely, returning the status that it /// exited with. This function will continue to have the same return value /// after it has been called at least once. -- cgit 1.4.1-3-g733a5