From b8c59a1c8bb1352daacf03674a08bfa294edbbca Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 31 Jan 2016 09:49:21 +0100
Subject: [PATCH] Support for systemd

---
 arexxd.c       | 20 ++++++++++++++------
 arexxd.service | 13 +++++++++++++
 2 files changed, 27 insertions(+), 6 deletions(-)
 create mode 100644 arexxd.service

diff --git a/arexxd.c b/arexxd.c
index 52cb17c..462b664 100644
--- a/arexxd.c
+++ b/arexxd.c
@@ -45,6 +45,7 @@ static int debug_packets;
 static int debug_raw_data;
 static int debug_usb;
 static char *log_dir = DEFAULT_LOG_DIR;
+static int no_fork;
 
 static void die(char *fmt, ...)
 {
@@ -604,6 +605,7 @@ static void interruptible_msleep(int ms)
 static const struct option long_options[] = {
 	{ "debug",		0, NULL, 'd' },
 	{ "log-dir",		1, NULL, 'l' },
+	{ "no-fork",		0, NULL, 'n' },
 	{ "debug-packets",	0, NULL, 'p' },
 	{ "debug-raw",		0, NULL, 'r' },
 	{ "version",		0, NULL, 'V' },
@@ -618,6 +620,7 @@ Usage: arexxd <options>\n\
 Options:\n\
 -d, --debug		Debug mode (no chdir, no fork, no syslog)\n\
 -l, --log-dir=<dir>	Directory where all received data should be stored\n\
+-n, --no-fork		Do not fork\n\
 -p, --debug-packets	Log all packets sent and received\n\
 -r, --debug-raw		Log conversion from raw values\n\
 -u, --debug-usb		Enable libusb debug messages (to stdout/stderr)\n\
@@ -629,7 +632,7 @@ Options:\n\
 int main(int argc, char **argv)
 {
 	int opt;
-	while ((opt = getopt_long(argc, argv, "dl:pruV", long_options, NULL)) >= 0)
+	while ((opt = getopt_long(argc, argv, "dl:npruV", long_options, NULL)) >= 0)
 		switch (opt) {
 			case 'd':
 				debug_mode++;
@@ -637,6 +640,9 @@ int main(int argc, char **argv)
 			case 'l':
 				log_dir = optarg;
 				break;
+			case 'n':
+				no_fork++;
+				break;
 			case 'p':
 				debug_packets++;
 				break;
@@ -672,11 +678,13 @@ int main(int argc, char **argv)
 			setlinebuf(stdout);
 		}
 		openlog("arexxd", LOG_NDELAY, LOG_DAEMON);
-		pid_t pid = fork();
-		if (pid < 0)
-			die("fork() failed: %m");
-		if (pid)
-			return 0;
+		if (!no_fork) {
+			pid_t pid = fork();
+			if (pid < 0)
+				die("fork() failed: %m");
+			if (pid)
+				return 0;
+		}
 		setsid();
 		use_syslog = 1;
 	}
diff --git a/arexxd.service b/arexxd.service
new file mode 100644
index 0000000..e83cc62
--- /dev/null
+++ b/arexxd.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Arexx data logger daemon
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/sbin/arexxd --no-fork
+User=arexxd
+Group=arexxd
+KillMode=process
+
+[Install]
+WantedBy=multi-user.target
-- 
2.39.5