From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Sat, 11 Jul 2020 09:37:01 +0000 (+0200)
Subject: prctl.2: The parent death signal is cleared on some credential changes
X-Git-Tag: man-pages-5.08~61
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=402f2e7b6708be6bef7a5c8c93f31f13e63366ed;p=thirdparty%2Fman-pages.git

prctl.2: The parent death signal is cleared on some credential changes

See kernel/cred.c::commit_creds() in the Linux 5.6 source code.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---

diff --git a/man2/prctl.2 b/man2/prctl.2
index 99bddd3cc7..d2a52d34c5 100644
--- a/man2/prctl.2
+++ b/man2/prctl.2
@@ -1079,6 +1079,12 @@ or a binary that has associated capabilities (see
 .BR capabilities (7));
 otherwise, this value is preserved across
 .BR execve (2).
+The parent-death signal setting is also cleared upon changes to
+any of the following thread credentials:
+.\" FIXME capability changes can also trigger this; see
+.\" kernel/cred.c::commit_creds inthe Linux 5.6 source.
+effective user ID, effective group ID, filesystem user ID,
+or filesystem group ID.
 .\" prctl PR_GET_PDEATHSIG
 .TP
 .BR PR_GET_PDEATHSIG " (since Linux 2.3.15)"