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Diffstat (limited to 'library/std/src/os/linux/process.rs')
| -rw-r--r-- | library/std/src/os/linux/process.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/library/std/src/os/linux/process.rs b/library/std/src/os/linux/process.rs index 2b3ff76d7..51af432d0 100644 --- a/library/std/src/os/linux/process.rs +++ b/library/std/src/os/linux/process.rs @@ -152,6 +152,12 @@ pub trait CommandExt: Sealed { /// in a guaranteed race-free manner (e.g. if the `clone3` system call /// is supported). Otherwise, [`pidfd`] will return an error. /// + /// If a pidfd has been successfully created and not been taken from the `Child` + /// then calls to `kill()`, `wait()` and `try_wait()` will use the pidfd + /// instead of the pid. This can prevent pid recycling races, e.g. + /// those caused by rogue libraries in the same process prematurely reaping + /// zombie children via `waitpid(-1, ...)` calls. + /// /// [`Command`]: process::Command /// [`Child`]: process::Child /// [`pidfd`]: fn@ChildExt::pidfd |