closes bpo-38712: Add signal.pidfd_send_signal. (GH-17070)

This exposes a Linux-specific syscall for sending a signal to a process
identified by a file descriptor rather than a pid.

For simplicity, we don't support the siginfo_t parameter to the syscall. This
parameter allows implementing a pidfd version of rt_sigqueueinfo(2), which
Python also doesn't support.

1 files changed, 7 insertions, 0 deletions

diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
index ddb295f..ce1d3e0 100644
--- a/Doc/whatsnew/3.9.rst
+++ b/Doc/whatsnew/3.9.rst
@@ -197,6 +197,13 @@ now raises :exc:`ImportError` instead of :exc:`ValueError` for invalid relative
 import attempts.
 (Contributed by Ngalim Siregar in :issue:`37444`.)
 
+signal
+------
+
+Exposed the Linux-specific :func:`signal.pidfd_send_signal` for sending to
+signals to a process using a file descriptor instead of a pid. (:issue:`38712`)
+
+
 Optimizations
 =============