From: Cristiano Giuffrida <giuffrida@cs.vu.nl>
Date: Mon, 3 Mar 2014 01:04:02 +0000 (+0100)
Subject: kernel: Add SYS_PRIV_CLEAR_IPC_REFS support.
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=refs%2Fchanges%2F79%2F3079%2F2;p=minix.git

kernel: Add SYS_PRIV_CLEAR_IPC_REFS support.

Change-Id: Ie5e86191d5040f305a5a42942d83319cd600bfb6
---

diff --git a/minix/include/minix/com.h b/minix/include/minix/com.h
index 2082eb59d..f2474f926 100644
--- a/minix/include/minix/com.h
+++ b/minix/include/minix/com.h
@@ -346,6 +346,7 @@
 #define SYS_PRIV_QUERY_MEM	8	/* Verify memory privilege. */
 #define SYS_PRIV_UPDATE_SYS	9	/* Update a sys privilege structure. */
 #define SYS_PRIV_YIELD	       10	/* Allow process to run and suspend */
+#define SYS_PRIV_CLEAR_IPC_REFS 11	/* Clear pending IPC for the process */
 
 /* Constants for exec. FIXME: these do not belong here. */
 #define PMEF_AUXVECTORS	20
diff --git a/minix/kernel/system/do_privctl.c b/minix/kernel/system/do_privctl.c
index aa1ed57f5..ef2b9ffae 100644
--- a/minix/kernel/system/do_privctl.c
+++ b/minix/kernel/system/do_privctl.c
@@ -79,6 +79,11 @@ int do_privctl(struct proc * caller, message * m_ptr)
 	RTS_SET(rp, RTS_NO_PRIV);
 	return(OK);
 
+  case SYS_PRIV_CLEAR_IPC_REFS:
+	/* Clear pending IPC for the process. */
+	clear_ipc_refs(rp, EDEADSRCDST);
+	return(OK);
+
   case SYS_PRIV_SET_SYS:
 	/* Set a privilege structure of a blocked system process. */
 	if (! RTS_ISSET(rp, RTS_NO_PRIV)) return(EPERM);