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12 Commits

Author SHA1 Message Date
Konstantin Belousov
1302eea7bb Rename PROC_PDEATHSIG_SET -> PROC_PDEATHSIG_CTL and PROC_PDEATHSIG_GET 
-> PROC_PDEATHSIG_STATUS for consistency with other procctl(2)
operations names.

Requested by:	emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	13 days
 2018-04-20 15:19:27 +00:00
Konstantin Belousov
b940886338 Add PROC_PDEATHSIG_SET to procctl interface. 
Allow processes to request the delivery of a signal upon death of
their parent process.  Supposed consumer of the feature is PostgreSQL.

Submitted by:	Thomas Munro
Reviewed by:	jilles, mjg
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D15106
 2018-04-18 21:31:13 +00:00
Konstantin Belousov
ee50062cfb Kill all descendants of the reaper, even if they are descendants of a 
subordinate reaper.

Also, mark reapers when listing pids.

Reported by:	Michael Zuo <muh.muhten@gmail.com>
PR:	223745
Reviewed by:	bapt
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D13183
 2017-11-23 11:25:11 +00:00
Jilles Tjoelker
b9a6fb9343 reaper: Make REAPER_KILL_SUBTREE actually work. 
MFC after:	2 weeks
 2016-12-14 22:49:20 +00:00
Konstantin Belousov
939457e3e0 Add the foundation copyrights to procctl kernel sources. 
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
 2016-09-23 12:32:20 +00:00
Konstantin Belousov
643f6f47fd Add PROC_TRAPCAP procctl(2) controls and global sysctl kern.trap_enocap. 
Both can be used to cause processes in capability mode to receive
SIGTRAP when ENOTCAPABLE or ECAPMODE errors are returned from
syscalls.

Idea by:	emaste
Reviewed by:	oshogbo (previous version), emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D7965
 2016-09-21 08:23:33 +00:00
Konstantin Belousov
41d50cd6b7 If process becomes reaper (procctl(PROC_REAP_ACQUIRE)) while already 
having some children, the children' reaper is not reset to the parent.
This allows for the situation where reaper has children but not
descendands and the too strict asserts in the reap_status() fire.

Remove the wrong asserts, add some clarification for the situation to
the procctl(2) REAP_STATUS.

Reported and tested by:	feld
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
 2015-08-20 22:44:26 +00:00
Konstantin Belousov
45f1ade79b Reparenting done by debugger attach can leave reaper without direct 
children.  Handle the situation instead asserting that it is
impossible.

Reported and tested by:	emaste
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
 2015-02-15 08:44:30 +00:00
Konstantin Belousov
4b685a2862 Return with the process locked, caller expects p still locked after 
the call.

Reported and tested by:	bapt
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
 2015-02-15 08:43:19 +00:00
Konstantin Belousov
677258f7e7 Add procctl(2) PROC_TRACE_CTL command to enable or disable debugger 
attachment to the process.  Note that the command is not intended to
be a security measure, rather it is an obfuscation feature,
implemented for parity with other operating systems.

Discussed with:	jilles, rwatson
Man page fixes by:	rwatson
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
 2015-01-18 15:13:11 +00:00
Konstantin Belousov
5b73811feb Add missed break. 
CID:	1258587
Sponsored by:	The FreeBSD Foundation
MFC after:	20 days
 2014-12-16 09:49:07 +00:00
Konstantin Belousov
237623b028 Add a facility for non-init process to declare itself the reaper of 
the orphaned descendants.  Base of the API is modelled after the same
feature from the DragonFlyBSD.

Requested by:	bapt
Reviewed by:	jilles (previous version)
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks
 2014-12-15 12:01:42 +00:00