linux-kernel - [PATCH 26/33] [libgencore] Setting up Connection

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Date:	Thu, 20 Mar 2014 15:12:38 +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 26/33] [libgencore] Setting up Connection

Creating a socket and setting up a connection with the server(daemon).

Signed-off-by: Janani Venkataraman <jananive@...ux.vnet.ibm.com>
---
 src/Makefile.am |    4 +++
 src/client.c    |   70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 src/client.c

diff --git a/src/Makefile.am b/src/Makefile.am
index b9b2e9b..a1d57ca 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,6 +3,10 @@ HAVE_SYSTEMD_SOCKET_SUPPORT = 0
 SOCKET_PATH = /var/run/gencored.socket
 CFLAGS += -I. -DHAVE_SYSTEMD_SOCKET_SUPPORT='$(HAVE_SYSTEMD_SOCKET_SUPPORT)' -DSOCKET_PATH='"$(SOCKET_PATH)"'
 
+lib_LTLIBRARIES = libgencore.la
+libgencore_la_LDFLAGS = -fPIC
+libgencore_la_SOURCES = client.c
+
 bin_PROGRAMS = gencore
 gencore_SOURCES = coredump.c proc.c elf32.c elf64.c
 
diff --git a/src/client.c b/src/client.c
new file mode 100644
index 0000000..cddaf94
--- /dev/null
+++ b/src/client.c
@@ -0,0 +1,70 @@
+/*
+ * Client interface for selfdump.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2013
+ *
+ * Authors:
+ *      Janani Venkataraman <jananve@...ibm.com>
+ */
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+int setup_connection(void)
+{
+	int socket_fd;
+	struct sockaddr_un address;
+	socklen_t len = sizeof(struct sockaddr_un);
+
+	/* Creating the socket */
+	socket_fd = socket(PF_UNIX, SOCK_STREAM, 0);
+	if (socket_fd < 0)
+		return -1;
+
+	memset(&address, 0, len);
+
+	address.sun_family = PF_FILE;
+	strcpy(address.sun_path, SOCKET_PATH);
+
+	/* Connecting to the server */
+	if (connect(socket_fd, (struct sockaddr *) &address, len)) {
+		close(socket_fd);
+		return -1;
+	}
+
+	return socket_fd;
+}
+
+int gencore(char *corefile)
+{
+	int socket, ret;
+
+	/* Socket operation */
+	socket = setup_connection();
+	if (socket == -1) {
+		ret = errno;
+		goto cleanup;
+	}
+
+cleanup:
+
+	return ret;
+}

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