From 47f13f5eca6228b45b46ed0d05c9b943471fd90a Mon Sep 17 00:00:00 2001
From: liupan1111 <liupan1111@gmail.com>
Date: Wed, 7 Dec 2016 08:15:19 +0800
Subject: [PATCH] iscsi_tgt: add daemon mode for iscsi target (#69)

* iscsi: add daemon mode for iscsi target

* change the default daemon mode of iscsi tgt to false
---
 app/iscsi_tgt/iscsi_tgt.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/app/iscsi_tgt/iscsi_tgt.c b/app/iscsi_tgt/iscsi_tgt.c
index a80b97a38..cfc63ecac 100644
--- a/app/iscsi_tgt/iscsi_tgt.c
+++ b/app/iscsi_tgt/iscsi_tgt.c
@@ -75,6 +75,7 @@ usage(char *executable_name)
 	printf(" -s size    memory size in MB for DPDK\n");
 	spdk_tracelog_usage(stdout, "-t");
 	printf(" -H         show this usage\n");
+	printf(" -b         run iscsi target background, the default is foreground\n");
 	printf(" -d         disable coredump file enabling\n");
 	printf(" -q         disable notice level logging to stderr\n");
 }
@@ -93,6 +94,7 @@ main(int argc, char **argv)
 {
 	int ch;
 	int rc, app_rc;
+	int daemon_mode = 0;
 	struct spdk_app_opts opts = {};
 
 	/* default value in opts structure */
@@ -101,7 +103,7 @@ main(int argc, char **argv)
 	opts.config_file = SPDK_ISCSI_DEFAULT_CONFIG;
 	opts.name = "iscsi";
 
-	while ((ch = getopt(argc, argv, "c:de:i:l:m:n:p:qs:t:H")) != -1) {
+	while ((ch = getopt(argc, argv, "bc:de:i:l:m:n:p:qs:t:H")) != -1) {
 		switch (ch) {
 		case 'd':
 			opts.enable_coredump = false;
@@ -147,6 +149,9 @@ main(int argc, char **argv)
 		case 's':
 			opts.dpdk_mem_size = atoi(optarg);
 			break;
+		case 'b':
+			daemon_mode = 1;
+			break;
 		case 'H':
 		default:
 			usage(argv[0]);
@@ -154,6 +159,13 @@ main(int argc, char **argv)
 		}
 	}
 
+	if (daemon_mode) {
+		if (daemon(1, 0) < 0) {
+			SPDK_ERRLOG("Start iscsi target daemon faild.\n");
+			exit(EXIT_FAILURE);
+		}
+	}
+
 	if (spdk_g_notice_stderr_flag == 1 &&
 	    isatty(STDERR_FILENO) &&
 	    !strncmp(ttyname(STDERR_FILENO), "/dev/tty", strlen("/dev/tty"))) {