From a14bade6c6c17df9c0877c30e4903a1e2d8175fd Mon Sep 17 00:00:00 2001
From: Jeremie Koenig <jk@jk.fr.eu.org>
Date: Sun, 27 Dec 2020 00:53:20 +0100
Subject: proc: send signals with POSIX sigcodes

* proc/stubs.c (send_signal): Add a sigcode argument.
* proc/proc.h (send_signal): Declare the sigcode argument.
* proc/pgrp.c (leave_pgrp): Specify a null sigcode.
* proc/wait.c (alert_parent): Use CLD_EXITED for SIGCHLD on exit.
(S_proc_mark_stop): Use CLD_STOPPED for SIGCHLD on stop.
---
 proc/pgrp.c  | 4 ++--
 proc/proc.h  | 2 +-
 proc/stubs.c | 3 ++-
 proc/wait.c  | 4 ++--
 4 files changed, 7 insertions(+), 6 deletions(-)

(limited to 'proc')

diff --git a/proc/pgrp.c b/proc/pgrp.c
index a7876764..07e587a3 100644
--- a/proc/pgrp.c
+++ b/proc/pgrp.c
@@ -523,8 +523,8 @@ leave_pgrp (struct proc *p)
       if (dosignal)
 	for (ip = pg->pg_plist; ip; ip = ip->p_gnext)
 	  {
-	    send_signal (ip->p_msgport, SIGHUP, ip->p_task);
-	    send_signal (ip->p_msgport, SIGCONT, ip->p_task);
+	    send_signal (ip->p_msgport, SIGHUP, 0, ip->p_task);
+	    send_signal (ip->p_msgport, SIGCONT, 0, ip->p_task);
 	  }
     }
 }
diff --git a/proc/proc.h b/proc/proc.h
index 95f9e3d5..64f276d3 100644
--- a/proc/proc.h
+++ b/proc/proc.h
@@ -213,7 +213,7 @@ void complete_exit (struct proc *);
 
 void initialize_version_info (void);
 
-void send_signal (mach_port_t, int, mach_port_t);
+void send_signal (mach_port_t, int, int, mach_port_t);
 
 
 #endif
diff --git a/proc/stubs.c b/proc/stubs.c
index b5f9d09b..50882418 100644
--- a/proc/stubs.c
+++ b/proc/stubs.c
@@ -76,6 +76,7 @@ blocking_message_send (void *arg)
 void
 send_signal (mach_port_t msgport,
 	     int signal,
+	     int sigcode,
 	     mach_port_t refport)
 {
   error_t err;
@@ -118,7 +119,7 @@ send_signal (mach_port_t msgport,
       0,			/* msgt_unused */
     },
     /* Sigcode */
-    0,
+    sigcode,
     {
       /* Type descriptor for refport */
       MACH_MSG_TYPE_COPY_SEND, /* msgt_name */
diff --git a/proc/wait.c b/proc/wait.c
index e8c379a0..8883d458 100644
--- a/proc/wait.c
+++ b/proc/wait.c
@@ -145,7 +145,7 @@ alert_parent (struct proc *p)
   /* We accumulate the aggregate usage stats of all our dead children.  */
   rusage_add (&p->p_parent->p_child_rusage, &p->p_rusage);
 
-  send_signal (p->p_parent->p_msgport, SIGCHLD, p->p_parent->p_task);
+  send_signal (p->p_parent->p_msgport, SIGCHLD, CLD_EXITED, p->p_parent->p_task);
 
   if (!p->p_exiting)
     {
@@ -258,7 +258,7 @@ S_proc_mark_stop (struct proc *p,
     }
 
   if (!p->p_parent->p_nostopcld)
-    send_signal (p->p_parent->p_msgport, SIGCHLD, p->p_parent->p_task);
+    send_signal (p->p_parent->p_msgport, SIGCHLD, CLD_STOPPED, p->p_parent->p_task);
 
   return 0;
 }
-- 
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