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SubjectRe: [PATCH v2 0/7] CLONE_FD: Task exit notification via file descriptor
On 03/15/2015 08:59 AM, Josh Triplett wrote:
> This patch series introduces a new clone flag, CLONE_FD, which lets the caller
> receive child process exit notification via a file descriptor rather than
> SIGCHLD. CLONE_FD makes it possible for libraries to safely launch and manage
> child processes on behalf of their caller, *without* taking over process-wide
> SIGCHLD handling (either via signal handler or signalfd).
> Note that signalfd for SIGCHLD does not suffice here, because that still
> receives notification for all child processes, and interferes with process-wide
> signal handling.

It has been suggested (e.g.,
<>) that you can
use the existing clone(2) without specifying SIGCHLD to create a new
process. The resulting child process is not supposed to show up in
wait(2), only in a waitpid(2) (or similar) explicitly specifying the
PID. Is this not the case?

Florian Weimer / Red Hat Product Security

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