From: hartkopp <hartkopp@030b6a49-0b11-0410-94ab-b0dab22257f2>
Date: Mon, 29 Nov 2010 18:58:12 +0000 (+0000)
Subject: cangen: Added '-n <count>' commandline option analogue to candump tool.
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/socketcan-devel.git/commitdiff_plain/92864c3c8efc225491b563b808204d2a0536755b

cangen: Added '-n <count>' commandline option analogue to candump tool.
Inspired by Uwe Bonnes.


git-svn-id: svn://svn.berlios.de//socketcan/trunk@1216 030b6a49-0b11-0410-94ab-b0dab22257f2
---

diff --git a/can-utils/cangen.c b/can-utils/cangen.c
index 898068b..9009c05 100644
--- a/can-utils/cangen.c
+++ b/can-utils/cangen.c
@@ -95,6 +95,8 @@ void print_usage(char *prg)
 		" generation mode - see below)\n");
 	fprintf(stderr, "         -p <timeout>  (poll on -ENOBUFS to write frames"
 		" with <timeout> ms)\n");
+	fprintf(stderr, "         -n <count>    (terminate after <count> CAN frames "
+		"- default infinite)\n");
 	fprintf(stderr, "         -i            (ignore -ENOBUFS return values on"
 		" write() syscalls)\n");
 	fprintf(stderr, "         -x            (disable local loopback of "
@@ -139,6 +141,7 @@ int main(int argc, char **argv)
 	unsigned char dlc_mode = MODE_RANDOM;
 	unsigned char loopback_disable = 0;
 	unsigned char verbose = 0;
+	int count = 0;
 	uint64_t incdata = 0;
 
 	int opt;
@@ -157,7 +160,7 @@ int main(int argc, char **argv)
 	signal(SIGHUP, sigterm);
 	signal(SIGINT, sigterm);
 
-	while ((opt = getopt(argc, argv, "ig:eI:L:D:xp:vh?")) != -1) {
+	while ((opt = getopt(argc, argv, "ig:eI:L:D:xp:n:vh?")) != -1) {
 		switch (opt) {
 
 		case 'i':
@@ -220,6 +223,14 @@ int main(int argc, char **argv)
 			polltimeout = strtoul(optarg, NULL, 10);
 			break;
 
+		case 'n':
+			count = atoi(optarg);
+			if (count < 1) {
+				print_usage(basename(argv[0]));
+				return 1;
+			}
+			break;
+
 		case '?':
 		case 'h':
 		default:
@@ -302,6 +313,9 @@ int main(int argc, char **argv)
 
 	while (running) {
 
+		if (count && (--count == 0))
+			running = 0;
+
 		if (id_mode == MODE_RANDOM) {
 
 			frame.can_id = random();