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added a -h help option and made the help text a bit more readable

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This commit is contained in:
Stephen Dwyer
2012-06-22 15:39:02 -06:00
committed by Felix Ruess
parent 2e21c68037
commit 3700658c61
1 changed files with 11 additions and 6 deletions
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sw/simulator/nps/nps_main.c
+11 -6
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@@ -224,11 +224,12 @@ static bool_t nps_main_parse_options(int argc, char** argv) {
static const char* usage =
"Usage: %s [options]\n"
" Options :\n"
" --fg_host flight gear host\n"
" --fg_port flight gear port\n"
" -j --js_dev joystick device\n"
" --spektrum_dev spektrum device\n"
" --rc_script no\n";
" -h Display this help\n"
" --fg_host <flight gear host> e.g. 127.0.0.1\n"
" --fg_port <flight gear port> e.g. 5501\n"
" -j --js_dev <joystick device or index> e.g. /dev/input/js0 or 0\n"
" --spektrum_dev <spektrum device> e.g. /dev/ttyUSB0\n"
" --rc_script <number> e.g. 0\n";
while (1) {
@@ -242,7 +243,7 @@ static bool_t nps_main_parse_options(int argc, char** argv) {
{0, 0, 0, 0}
};
int option_index = 0;
int c = getopt_long(argc, argv, "j:",
int c = getopt_long(argc, argv, "j:h",
long_options, &option_index);
if (c == -1)
break;
@@ -267,6 +268,10 @@ static bool_t nps_main_parse_options(int argc, char** argv) {
nps_main.js_dev = strdup(optarg);
break;
case 'h':
fprintf(stderr, usage, argv[0]);
exit(0);
default: /* $B!G(B?$B!G(B */
printf("?? getopt returned character code 0%o ??\n", c);
fprintf(stderr, usage, argv[0]);