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add long options, and update usage message

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This commit is contained in:
James Laird
2013-06-20 00:48:20 +10:00
parent d699d43551
commit b8e8a22cc2
1 changed files with 36 additions and 25 deletions
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shairport.c
+36 -25
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@@ -32,6 +32,7 @@
#include "common.h"
#include "rtsp.h"
#include "mdns.h"
#include "getopt_long.h"
static int shutting_down = 0;
void shairport_shutdown(void) {
@@ -61,41 +62,51 @@ static void sig_child(int foo, siginfo_t *bar, void *baz) {
}
void usage(char *progname) {
printf("Usage: %s [options...] [-- [output options...]]\n\n", progname);
printf("Available options:\n"
" -h show this help\n"
" -p port set RTSP listening port\n"
" -a name set advertised name\n"
" -o output set audio output\n"
" -b fill set how full the buffer must be before audio output starts\n"
" This value is in frames; default %d\n"
" -d fork (daemonise)\n"
" The PID of the child process is written to stdout\n"
" -B command run a shell command when playback begins\n"
" -E command run a shell command when playback ends\n"
"\n"
"Run %s -o <output> -h to find the available options for a specific output\n"
"\n", config.buffer_start_fill, progname);
printf("Usage: %s [options...]\n", progname);
printf(" or: %s [options...] -- [audio output-specific options]\n", progname);
if (config.output_name)
config.output = audio_get_output(config.output_name);
if (config.output) {
printf("Options for output %s:\n", config.output_name);
config.output->help();
} else {
audio_ls_outputs();
}
printf("\n");
printf("Mandatory arguments to long options are mandatory for short options too.\n");
printf("\n");
printf("Options:\n");
printf(" -h, --help show this help\n");
printf(" -p, --port=PORT set RTSP listening port\n");
printf(" -a, --name=NAME set advertised name\n");
printf(" -b FILL set how full the buffer must be before audio output\n");
printf(" starts. This value is in frames; default %d\n", config.buffer_start_fill);
printf(" -d, --daemon fork (daemonise). The PID of the child process is\n");
printf(" written to stdout\n");
printf(" -B, --on-start=COMMAND run a shell command when playback begins\n");
printf(" -E, --on-stop=COMMAND run a shell command when playback ends\n");
printf(" -o, --output=BACKEND select audio output method\n");
printf("\n");
audio_ls_outputs();
}
int parse_options(int argc, char **argv) {
// prevent unrecognised arguments from being shunted to the audio driver
setenv("POSIXLY_CORRECT", "", 1);
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"daemon", no_argument, NULL, 'd'},
{"port", required_argument, NULL, 'p'},
{"name", required_argument, NULL, 'a'},
{"output", required_argument, NULL, 'o'},
{"on-start",required_argument, NULL, 'B'},
{"on-stop", required_argument, NULL, 'E'},
{NULL, 0, NULL, 0}
};
int opt;
while ((opt = getopt(argc, argv, "+hdvp:a:o:b:B:E:")) > 0) {
while ((opt = getopt_long(argc, argv,
"+hdvp:a:o:b:B:E:",
long_options, NULL)) > 0) {
switch (opt) {
default:
printf("Unknown argument -%c\n", optopt);
case 'h':
usage(argv[0]);
exit(1);