From 8aad2de2c47c5864599508ea9c73ff6d1aca463c Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Wed, 25 Sep 2002 01:02:57 +0000
Subject: [PATCH] Added help() and --help flag

---
 comedi_calibrate/comedi_calibrate.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/comedi_calibrate/comedi_calibrate.c b/comedi_calibrate/comedi_calibrate.c
index dc2a2fd..eb8905f 100644
--- a/comedi_calibrate/comedi_calibrate.c
+++ b/comedi_calibrate/comedi_calibrate.c
@@ -69,6 +69,7 @@ struct option options[] = {
 	{ "verbose", 0, 0, 'v' },
 	{ "quiet", 0, 0, 'q' },
 	{ "file", 1, 0, 'f' },
+	{ "help", 0, 0, 'h' },
 	{ "driver-name", 1, 0, 0x1000 },
 	{ "device-name", 1, 0, 0x1001 },
 	{ "reset", 0, &do_reset, 1 },
@@ -84,6 +85,22 @@ struct option options[] = {
 	{ 0 },
 };
 
+void help(void)
+{
+	printf("comedi_calibrate [options] - autocalibrates a Comedi device\n");
+	printf("  --verbose, -v  \n");
+	printf("  --quiet, -q  \n");
+	printf("  --help, -h  \n");
+	printf("  --file, -f [/dev/comediN] \n");
+	printf("  --driver-name [driver]  \n");
+	printf("  --device-name [device]  \n");
+	printf("  --[no-]reset  \n");
+	printf("  --[no-]calibrate  \n");
+	printf("  --[no-]dump  \n");
+	printf("  --[no-]results  \n");
+	printf("  --[no-]output  \n");
+}
+
 int main(int argc, char *argv[])
 {
 	char *fn = NULL;
@@ -106,6 +123,10 @@ int main(int argc, char *argv[])
 		switch (c) {
 		case 0:
 			continue;
+		case 'h':
+			help();
+			exit(0);
+			break;
 		case 'f':
 			fn = optarg;
 			break;
@@ -122,7 +143,7 @@ int main(int argc, char *argv[])
 			devicename = optarg;
 			break;
 		default:
-			//printf("bad option %d\n",c);
+			help();
 			exit(1);
 		}
 	}
@@ -205,6 +226,8 @@ ok:
 	if(do_calibrate && setup.do_cal) setup.do_cal( &setup );
 	if(do_results) observe( &setup );
 
+	comedi_close(dev);
+
 	return 0;
 }
 
-- 
2.26.2