Initial import

[lttng-tools.git] / lttng / options.c

/* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 */

#include <popt.h>
#include <stdlib.h>

#include "lttng.h"

/* Option variables */
char *opt_tracing_group;
char *opt_session_name;
int opt_trace_kernel = 0;
int opt_quiet = 0;
int opt_verbose = 0;
int opt_list_apps = 0;

enum {
	OPT_HELP = 42,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help",			'h',	POPT_ARG_NONE,		0, OPT_HELP, 0, 0},
	{"group",			0,		POPT_ARG_STRING,	&opt_tracing_group, 0, 0},
	{"kernel",			0,		POPT_ARG_VAL,		&opt_trace_kernel, 1, 0, 0},
	{"no-kernel",		0,		POPT_ARG_VAL,		&opt_trace_kernel, 0, 0, 0},
	{"session",			0,		POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_session_name, 0, 0},
	{"quiet",			'q',	POPT_ARG_VAL,		&opt_quiet, 1, 0},
	{"verbose",			'v',	POPT_ARG_VAL,		&opt_verbose, 1, 0},
	{"list-apps",		'l',	POPT_ARG_VAL,		&opt_list_apps, 1, 0},
	{0, 0, 0, 0, 0, 0}
};


/*
 * 	usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "LTTng Trace Control " VERSION"\n\n");
	fprintf(ofp, "usage : lttng [OPTION]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Options:\n");
	fprintf(ofp, "  -v, --verbose           Verbose mode\n");
	fprintf(ofp, "  -q, --quiet             Quiet mode\n");
	fprintf(ofp, "      --help              Show help\n");
	fprintf(ofp, "      --group NAME        Unix tracing group name. (default: tracing)\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Tracing options:\n");
	//fprintf(ofp, "      --session [NAME]    Specify tracing session. If no NAME is given\n");
	//fprintf(ofp, "                          or option is ommited, a session will be created\n");
	//fprintf(ofp, "      --kernel            Enable kernel tracing\n");
	//fprintf(ofp, "      --no-kernel         Disable kernel tracing\n");
	fprintf(ofp, "  -l, --list-apps         List traceable UST applications\n");
}

/*
 *  parse_args
 *
 *  Parse command line arguments.
 *  Return 0 if OK, else -1
 */
int parse_args(int argc, const char **argv)
{
	static poptContext pc;
	int opt;

	pc = poptGetContext("lttng", argc, argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stderr);
			clean_exit(EXIT_SUCCESS);
			break;
		default:
			usage(stderr);
			clean_exit(EXIT_FAILURE);
			break;
		}
	}

	if (pc) {
		poptFreeContext(pc);
	}

	return 0;
}