linux-kernel - [PATCH 24/33] Handling SIG TERM of the child

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Message-ID: <20140320094216.14878.32708.stgit@localhost.localdomain>
Date:	Thu, 20 Mar 2014 15:12:16 +0530
From:	Janani Venkataraman <jananive@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	amwang@...hat.com, procps@...elists.org, rdunlap@...otime.net,
	james.hogan@...tec.com, aravinda@...ux.vnet.ibm.com, hch@....de,
	mhiramat@...hat.com, jeremy.fitzhardinge@...rix.com,
	xemul@...allels.com, d.hatayama@...fujitsu.com, coreutils@....org,
	kosaki.motohiro@...fujitsu.com, adobriyan@...il.com,
	util-linux@...r.kernel.org, tarundsk@...ux.vnet.ibm.com,
	vapier@...too.org, roland@...k.frob.com, ananth@...ux.vnet.ibm.com,
	gorcunov@...nvz.org, avagin@...nvz.org, oleg@...hat.com,
	eparis@...hat.com, suzuki@...ux.vnet.ibm.com, andi@...stfloor.org,
	tj@...nel.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org
Subject: [PATCH 24/33] Handling SIG TERM of the child

We handle SIGTERM on the child, by sending a message to the client and then
closing the socket opened for that connection.

Signed-off-by: Janani Venkataraman <jananive@...ux.vnet.ibm.com>
---
 src/coredump.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/coredump.c b/src/coredump.c
index c0da457..ab120b9 100755
--- a/src/coredump.c
+++ b/src/coredump.c
@@ -501,6 +501,18 @@ int dump_task(struct ucred *client_info, char *core_file)
 	return 0;
 }
 
+/* Handles signals to the child */
+void sig_handler_service_proc(int sig)
+{
+	if (sig != SIGPIPE)
+		send_reply(EINTR);
+	close(new_sock);
+
+	gencore_log("[%d]: Cleanup done and child exiting.\n", pid_log);
+
+	fflush(fp_log);
+}
+
 /* Services requests */
 int service_request(void)
 {
@@ -508,6 +520,11 @@ int service_request(void)
 	char core_file[CORE_FILE_NAME_SZ];
 	struct ucred client_info;
 
+	/* Handles stopping of the servicing process */
+	signal(SIGTERM, sig_handler_service_proc);
+	signal(SIGSEGV, sig_handler_service_proc);
+	signal(SIGPIPE, sig_handler_service_proc);
+
 	/* Receive the message */
 	ret = receive_core_filename(core_file);
 	if (ret)

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