[babeltrace.git] / converter / babeltrace.c

/*
 * babeltrace.c
 *
 * Babeltrace Trace Converter
 *
 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
 *
 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

#define _XOPEN_SOURCE 700
#include <config.h>
#include <babeltrace/babeltrace-internal.h>
#include <babeltrace/format.h>
#include <popt.h>
#include <errno.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <ftw.h>
#include <dirent.h>
#include <unistd.h>

#define DEFAULT_FILE_ARRAY_SIZE	1
static char *opt_input_format;
static char *opt_output_format;

static const char *opt_input_path;
static const char *opt_output_path;

static struct trace_collection trace_collection_read;
static struct format *fmt_read;

void strlower(char *str)
{
	while (*str) {
		*str = tolower(*str);
		str++;
	}
}

enum {
	OPT_NONE = 0,
	OPT_HELP,
	OPT_LIST,
	OPT_VERBOSE,
	OPT_DEBUG,
	OPT_NAMES,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{ "input-format", 'i', POPT_ARG_STRING, &opt_input_format, OPT_NONE, NULL, NULL },
	{ "output-format", 'o', POPT_ARG_STRING, &opt_output_format, OPT_NONE, NULL, NULL },
	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
	{ "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
	{ "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
	{ "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
	{ "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
	{ NULL, 0, 0, NULL, 0, NULL, NULL },
};

static void list_formats(FILE *fp)
{
	fprintf(fp, "\n");
	bt_fprintf_format_list(fp);
}

static void usage(FILE *fp)
{
	fprintf(fp, "BabelTrace Trace Converter %s\n\n", VERSION);
	fprintf(fp, "usage : babeltrace [OPTIONS] INPUT <OUTPUT>\n");
	fprintf(fp, "\n");
	fprintf(fp, "  INPUT                          Input trace path\n");
	fprintf(fp, "  OUTPUT                         Output trace path (default: stdout)\n");
	fprintf(fp, "\n");
	fprintf(fp, "  -i, --input-format FORMAT      Input trace format (default: ctf)\n");
	fprintf(fp, "  -o, --output-format FORMAT     Output trace format (default: text)\n");
	fprintf(fp, "\n");
	fprintf(fp, "  -h, --help                     This help message\n");
	fprintf(fp, "  -l, --list                     List available formats\n");
	fprintf(fp, "  -v, --verbose                  Verbose mode\n");
	fprintf(fp, "                                 (or set BABELTRACE_VERBOSE environment variable)\n");
	fprintf(fp, "  -d, --debug                    Debug mode\n");
	fprintf(fp, "                                 (or set BABELTRACE_DEBUG environment variable)\n");
	fprintf(fp, "  -n, --names name1<,name2,...>  Print field names.\n");
	fprintf(fp, "                                 Available field names:\n");
	fprintf(fp, "                                     payload OR args OR arg\n");
	fprintf(fp, "                                     all, scope, header, context OR ctx\n");
	fprintf(fp, "                                        (payload active by default)\n");
	list_formats(fp);
	fprintf(fp, "\n");
}

static int get_names_args(poptContext *pc)
{
	char *str, *strlist, *strctx;

	opt_payload_field_names = 0;
	strlist = (char *) poptGetOptArg(*pc);
	if (!strlist) {
		return -EINVAL;
	}
	str = strtok_r(strlist, ",", &strctx);
	do {
		if (!strcmp(str, "all"))
			opt_all_field_names = 1;
		else if (!strcmp(str, "scope"))
			opt_scope_field_names = 1;
		else if (!strcmp(str, "context") || !strcmp(str, "ctx"))
			opt_context_field_names = 1;
		else if (!strcmp(str, "header"))
			opt_header_field_names = 1;
		else if (!strcmp(str, "payload") || !strcmp(str, "args") || !strcmp(str, "arg"))
			opt_payload_field_names = 1;
		else {
			fprintf(stdout, "[error] unknown field name type %s\n", str);
			return -EINVAL;
		}
	} while ((str = strtok_r(NULL, ",", &strctx)));
	return 0;
}

/*
 * Return 0 if caller should continue, < 0 if caller should return
 * error, > 0 if caller should exit without reporting error.
 */
static int parse_options(int argc, char **argv)
{
	poptContext pc;
	int opt, ret = 0;

	if (argc == 1) {
		usage(stdout);
		return 1;	/* exit cleanly */
	}

	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	/* set default */
	opt_payload_field_names = 1;

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stdout);
			ret = 1;	/* exit cleanly */
			goto end;
		case OPT_LIST:
			list_formats(stdout);
			ret = 1;
			goto end;
		case OPT_VERBOSE:
			babeltrace_verbose = 1;
			break;
		case OPT_NAMES:
			if (get_names_args(&pc)) {
				ret = -EINVAL;
				goto end;
			}
			break;
		case OPT_DEBUG:
			babeltrace_debug = 1;
			break;
		default:
			ret = -EINVAL;
			goto end;
		}
	}

	opt_input_path = poptGetArg(pc);
	if (!opt_input_path) {
		ret = -EINVAL;
		goto end;
	}
	opt_output_path = poptGetArg(pc);

end:
	if (pc) {
		poptFreeContext(pc);
	}
	return ret;
}

static void init_trace_collection(struct trace_collection *tc)
{
	tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
}

/*
 * finalize_trace_collection() closes the opened traces for read
 * and free the memory allocated for trace collection
 */
static void finalize_trace_collection(struct trace_collection *tc)
{
	int i;

	for (i = 0; i < tc->array->len; i++) {
		struct trace_descriptor *temp =
			g_ptr_array_index(tc->array, i);
		fmt_read->close_trace(temp);
	}
	g_ptr_array_free(tc->array, TRUE);
}

static void trace_collection_add(struct trace_collection *tc,
				 struct trace_descriptor *td)
{
	g_ptr_array_add(tc->array, td);
}

/*
 * traverse_dir() is the callback functiion for File Tree Walk (nftw).
 * it receives the path of the current entry (file, dir, link..etc) with
 * a flag to indicate the type of the entry.
 * if the entry being visited is a directory and contains a metadata file,
 * then open it for reading and save a trace_descriptor to that directory
 * in the read trace collection.
 */
static int traverse_dir(const char *fpath, const struct stat *sb,
			int tflag, struct FTW *ftwbuf)
{
	int dirfd;
	int fd;
	struct trace_descriptor *td_read;

	if (tflag != FTW_D)
		return 0;
	dirfd = open(fpath, 0);
	if (dirfd < 0) {
		fprintf(stdout, "[error] unable to open trace "
			"directory file descriptor.\n");
		return -1;
	}
	fd = openat(dirfd, "metadata", O_RDONLY);
	if (fd < 0) {
		close(dirfd);
	} else {
		close(fd);
		close(dirfd);
		td_read = fmt_read->open_trace(fpath, O_RDONLY, ctf_move_pos_slow,
				NULL);
		if (!td_read) {
			fprintf(stdout, "Error opening trace \"%s\" "
					"for reading.\n\n", fpath);
			return -1;	/* error */
		}
		trace_collection_add(&trace_collection_read, td_read);
	}
	return 0;	/* success */
}

int main(int argc, char **argv)
{
	int ret;
	struct format *fmt_write;
	struct trace_descriptor *td_write;

	ret = parse_options(argc, argv);
	if (ret < 0) {
		fprintf(stdout, "Error parsing options.\n\n");
		usage(stdout);
		exit(EXIT_FAILURE);
	} else if (ret > 0) {
		exit(EXIT_SUCCESS);
	}
	printf_verbose("Verbose mode active.\n");
	printf_debug("Debug mode active.\n");

	if (opt_input_format)
		strlower(opt_input_format);
	if (opt_output_format)
		strlower(opt_output_format);

	printf_verbose("Converting from directory: %s\n", opt_input_path);
	printf_verbose("Converting from format: %s\n",
		opt_input_format ? : "ctf <default>");
	printf_verbose("Converting to directory: %s\n",
		opt_output_path ? : "<stdout>");
	printf_verbose("Converting to format: %s\n",
		opt_output_format ? : "text <default>");

	if (!opt_input_format)
		opt_input_format = "ctf";
	if (!opt_output_format)
		opt_output_format = "text";
	fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
	if (!fmt_read) {
		fprintf(stdout, "[error] Format \"%s\" is not supported.\n\n",
			opt_input_format);
		exit(EXIT_FAILURE);
	}
	fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
	if (!fmt_write) {
		fprintf(stdout, "[error] format \"%s\" is not supported.\n\n",
			opt_output_format);
		exit(EXIT_FAILURE);
	}

	/*
	 * pass the input path to nftw() .
	 * specify traverse_dir() as the callback function.
	 * depth = 10 which is the max number of file descriptors
	 * that nftw() can open at a given time.
	 * flags = 0  check nftw documentation for more info .
	 */
	init_trace_collection(&trace_collection_read);
	ret = nftw(opt_input_path, traverse_dir, 10, 0);
	if (ret != 0) {
		fprintf(stdout, "[error] opening trace \"%s\" for reading.\n\n",
			opt_input_path);
		goto error_td_read;
	}
	if (trace_collection_read.array->len == 0) {
		fprintf(stdout, "[warning] no metadata file was found."
						" no output was generated\n");
		return 0;
	}

	td_write = fmt_write->open_trace(opt_output_path, O_RDWR, NULL, NULL);
	if (!td_write) {
		fprintf(stdout, "Error opening trace \"%s\" for writing.\n\n",
			opt_output_path ? : "<none>");
		goto error_td_write;
	}

	ret = convert_trace(td_write, &trace_collection_read);
	if (ret) {
		fprintf(stdout, "Error printing trace.\n\n");
		goto error_copy_trace;
	}

	fmt_write->close_trace(td_write);
	finalize_trace_collection(&trace_collection_read);
	printf_verbose("finished converting. Output written to:\n%s\n",
			opt_output_path ? : "<stdout>");
	exit(EXIT_SUCCESS);

	/* Error handling */
error_copy_trace:
	fmt_write->close_trace(td_write);
error_td_write:
	finalize_trace_collection(&trace_collection_read);
error_td_read:
	exit(EXIT_FAILURE);
}
Commit	Line	Data
34ac0e6c MD	1	/*
	2	* babeltrace.c
	3	*
	4	* Babeltrace Trace Converter
	5	*
64fa3fec MD	6	* Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
	7	*
	8	* Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
34ac0e6c MD	9	*
	10	* Permission is hereby granted, free of charge, to any person obtaining a copy
	11	* of this software and associated documentation files (the "Software"), to deal
	12	* in the Software without restriction, including without limitation the rights
	13	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	14	* copies of the Software, and to permit persons to whom the Software is
	15	* furnished to do so, subject to the following conditions:
	16	*
	17	* The above copyright notice and this permission notice shall be included in
	18	* all copies or substantial portions of the Software.
	19	*/
4c8bfb7e	20
afb48eae	21	#define _XOPEN_SOURCE 700
00f7fbf0	22	#include <config.h>
70bd0a12	23	#include <babeltrace/babeltrace-internal.h>
7fb21036	24	#include <babeltrace/format.h>
34ac0e6c MD	25	#include <popt.h>
	26	#include <errno.h>
	27	#include <stdlib.h>
bbefb8dd MD	28	#include <ctype.h>
	29	#include <sys/stat.h>
	30	#include <sys/types.h>
	31	#include <fcntl.h>
afb48eae AA	32	#include <ftw.h>
	33	#include <dirent.h>
	34	#include <unistd.h>
4c8bfb7e	35
afb48eae	36	#define DEFAULT_FILE_ARRAY_SIZE 1
bbefb8dd MD	37	static char *opt_input_format;
bbefb8dd MD	38	static char *opt_output_format;
34ac0e6c MD	39
	40	static const char *opt_input_path;
	41	static const char *opt_output_path;
	42
afb48eae AA	43	static struct trace_collection trace_collection_read;
	44	static struct format *fmt_read;
	45
bbefb8dd MD	46	void strlower(char *str)
	47	{
	48	while (*str) {
	49	str = tolower(str);
	50	str++;
	51	}
	52	}
	53
34ac0e6c MD	54	enum {
	55	OPT_NONE = 0,
	56	OPT_HELP,
7fb21036	57	OPT_LIST,
34ac0e6c MD	58	OPT_VERBOSE,
34ac0e6c MD	59	OPT_DEBUG,
d63ca2cd	60	OPT_NAMES,
34ac0e6c MD	61	};
	62
	63	static struct poptOption long_options[] = {
	64	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	65	{ "input-format", 'i', POPT_ARG_STRING, &opt_input_format, OPT_NONE, NULL, NULL },
	66	{ "output-format", 'o', POPT_ARG_STRING, &opt_output_format, OPT_NONE, NULL, NULL },
	67	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
7fb21036	68	{ "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
34ac0e6c MD	69	{ "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
34ac0e6c MD	70	{ "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
cba1661c	71	{ "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
34ac0e6c MD	72	{ NULL, 0, 0, NULL, 0, NULL, NULL },
	73	};
	74
7fb21036 MD	75	static void list_formats(FILE *fp)
	76	{
	77	fprintf(fp, "\n");
	78	bt_fprintf_format_list(fp);
	79	}
	80
34ac0e6c	81	static void usage(FILE *fp)
4c8bfb7e	82	{
00f7fbf0	83	fprintf(fp, "BabelTrace Trace Converter %s\n\n", VERSION);
4d5678b9	84	fprintf(fp, "usage : babeltrace [OPTIONS] INPUT <OUTPUT>\n");
34ac0e6c	85	fprintf(fp, "\n");
4d5678b9 MD	86	fprintf(fp, " INPUT Input trace path\n");
4d5678b9 MD	87	fprintf(fp, " OUTPUT Output trace path (default: stdout)\n");
34ac0e6c	88	fprintf(fp, "\n");
d2b8ea6b MD	89	fprintf(fp, " -i, --input-format FORMAT Input trace format (default: ctf)\n");
d2b8ea6b MD	90	fprintf(fp, " -o, --output-format FORMAT Output trace format (default: text)\n");
34ac0e6c	91	fprintf(fp, "\n");
4d5678b9 MD	92	fprintf(fp, " -h, --help This help message\n");
	93	fprintf(fp, " -l, --list List available formats\n");
	94	fprintf(fp, " -v, --verbose Verbose mode\n");
cba1661c	95	fprintf(fp, " (or set BABELTRACE_VERBOSE environment variable)\n");
4d5678b9	96	fprintf(fp, " -d, --debug Debug mode\n");
cba1661c MD	97	fprintf(fp, " (or set BABELTRACE_DEBUG environment variable)\n");
	98	fprintf(fp, " -n, --names name1<,name2,...> Print field names.\n");
	99	fprintf(fp, " Available field names:\n");
	100	fprintf(fp, " payload OR args OR arg\n");
	101	fprintf(fp, " all, scope, header, context OR ctx\n");
	102	fprintf(fp, " (payload active by default)\n");
7fb21036	103	list_formats(fp);
34ac0e6c MD	104	fprintf(fp, "\n");
	105	}
	106
cba1661c MD	107	static int get_names_args(poptContext *pc)
	108	{
	109	char str, strlist, *strctx;
	110
	111	opt_payload_field_names = 0;
	112	strlist = (char ) poptGetOptArg(pc);
	113	if (!strlist) {
	114	return -EINVAL;
	115	}
	116	str = strtok_r(strlist, ",", &strctx);
	117	do {
	118	if (!strcmp(str, "all"))
	119	opt_all_field_names = 1;
	120	else if (!strcmp(str, "scope"))
	121	opt_scope_field_names = 1;
	122	else if (!strcmp(str, "context") \|\| !strcmp(str, "ctx"))
	123	opt_context_field_names = 1;
	124	else if (!strcmp(str, "header"))
	125	opt_header_field_names = 1;
	126	else if (!strcmp(str, "payload") \|\| !strcmp(str, "args") \|\| !strcmp(str, "arg"))
	127	opt_payload_field_names = 1;
	128	else {
	129	fprintf(stdout, "[error] unknown field name type %s\n", str);
	130	return -EINVAL;
	131	}
	132	} while ((str = strtok_r(NULL, ",", &strctx)));
	133	return 0;
	134	}
	135
34ac0e6c MD	136	/*
	137	* Return 0 if caller should continue, < 0 if caller should return
	138	* error, > 0 if caller should exit without reporting error.
	139	*/
bbefb8dd	140	static int parse_options(int argc, char **argv)
34ac0e6c MD	141	{
	142	poptContext pc;
	143	int opt, ret = 0;
	144
0f980a35 MD	145	if (argc == 1) {
	146	usage(stdout);
	147	return 1; /* exit cleanly */
	148	}
	149
bbefb8dd	150	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
34ac0e6c MD	151	poptReadDefaultConfig(pc, 0);
34ac0e6c MD	152
cba1661c MD	153	/* set default */
	154	opt_payload_field_names = 1;
	155
34ac0e6c MD	156	while ((opt = poptGetNextOpt(pc)) != -1) {
	157	switch (opt) {
	158	case OPT_HELP:
7fb21036	159	usage(stdout);
34ac0e6c MD	160	ret = 1; /* exit cleanly */
34ac0e6c MD	161	goto end;
7fb21036 MD	162	case OPT_LIST:
	163	list_formats(stdout);
	164	ret = 1;
	165	goto end;
34ac0e6c MD	166	case OPT_VERBOSE:
	167	babeltrace_verbose = 1;
	168	break;
cba1661c MD	169	case OPT_NAMES:
	170	if (get_names_args(&pc)) {
	171	ret = -EINVAL;
	172	goto end;
	173	}
	174	break;
34ac0e6c MD	175	case OPT_DEBUG:
	176	babeltrace_debug = 1;
	177	break;
	178	default:
	179	ret = -EINVAL;
	180	goto end;
	181	}
	182	}
	183
	184	opt_input_path = poptGetArg(pc);
	185	if (!opt_input_path) {
	186	ret = -EINVAL;
	187	goto end;
	188	}
	189	opt_output_path = poptGetArg(pc);
cba1661c	190
34ac0e6c MD	191	end:
	192	if (pc) {
	193	poptFreeContext(pc);
	194	}
	195	return ret;
	196	}
	197
afb48eae AA	198	static void init_trace_collection(struct trace_collection *tc)
	199	{
	200	tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
	201	}
	202
	203	/*
	204	* finalize_trace_collection() closes the opened traces for read
	205	* and free the memory allocated for trace collection
	206	*/
	207	static void finalize_trace_collection(struct trace_collection *tc)
	208	{
	209	int i;
	210
	211	for (i = 0; i < tc->array->len; i++) {
	212	struct trace_descriptor *temp =
	213	g_ptr_array_index(tc->array, i);
	214	fmt_read->close_trace(temp);
	215	}
	216	g_ptr_array_free(tc->array, TRUE);
	217	}
	218
	219	static void trace_collection_add(struct trace_collection *tc,
	220	struct trace_descriptor *td)
	221	{
	222	g_ptr_array_add(tc->array, td);
	223	}
	224
	225	/*
	226	* traverse_dir() is the callback functiion for File Tree Walk (nftw).
	227	* it receives the path of the current entry (file, dir, link..etc) with
	228	* a flag to indicate the type of the entry.
	229	* if the entry being visited is a directory and contains a metadata file,
	230	* then open it for reading and save a trace_descriptor to that directory
	231	* in the read trace collection.
	232	*/
	233	static int traverse_dir(const char fpath, const struct stat sb,
	234	int tflag, struct FTW *ftwbuf)
	235	{
	236	int dirfd;
	237	int fd;
	238	struct trace_descriptor *td_read;
	239
	240	if (tflag != FTW_D)
	241	return 0;
	242	dirfd = open(fpath, 0);
	243	if (dirfd < 0) {
	244	fprintf(stdout, "[error] unable to open trace "
	245	"directory file descriptor.\n");
	246	return -1;
	247	}
	248	fd = openat(dirfd, "metadata", O_RDONLY);
	249	if (fd < 0) {
	250	close(dirfd);
	251	} else {
	252	close(fd);
	253	close(dirfd);
ae23d232 JD	254	td_read = fmt_read->open_trace(fpath, O_RDONLY, ctf_move_pos_slow,
ae23d232 JD	255	NULL);
afb48eae AA	256	if (!td_read) {
	257	fprintf(stdout, "Error opening trace \"%s\" "
	258	"for reading.\n\n", fpath);
	259	return -1; /* error */
	260	}
	261	trace_collection_add(&trace_collection_read, td_read);
	262	}
	263	return 0; /* success */
	264	}
	265
bbefb8dd	266	int main(int argc, char **argv)
34ac0e6c MD	267	{
34ac0e6c MD	268	int ret;
afb48eae AA	269	struct format *fmt_write;
afb48eae AA	270	struct trace_descriptor *td_write;
34ac0e6c MD	271
	272	ret = parse_options(argc, argv);
	273	if (ret < 0) {
bbefb8dd	274	fprintf(stdout, "Error parsing options.\n\n");
34ac0e6c MD	275	usage(stdout);
	276	exit(EXIT_FAILURE);
	277	} else if (ret > 0) {
	278	exit(EXIT_SUCCESS);
	279	}
	280	printf_verbose("Verbose mode active.\n");
	281	printf_debug("Debug mode active.\n");
	282
bbefb8dd MD	283	if (opt_input_format)
	284	strlower(opt_input_format);
	285	if (opt_output_format)
	286	strlower(opt_output_format);
	287
afb48eae	288	printf_verbose("Converting from directory: %s\n", opt_input_path);
34ac0e6c	289	printf_verbose("Converting from format: %s\n",
b61922b5	290	opt_input_format ? : "ctf <default>");
afb48eae	291	printf_verbose("Converting to directory: %s\n",
478b6389	292	opt_output_path ? : "<stdout>");
34ac0e6c	293	printf_verbose("Converting to format: %s\n",
b61922b5	294	opt_output_format ? : "text <default>");
bbefb8dd	295
b61922b5 MD	296	if (!opt_input_format)
	297	opt_input_format = "ctf";
	298	if (!opt_output_format)
	299	opt_output_format = "text";
bbefb8dd MD	300	fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
bbefb8dd MD	301	if (!fmt_read) {
c8b219a3	302	fprintf(stdout, "[error] Format \"%s\" is not supported.\n\n",
bbefb8dd MD	303	opt_input_format);
	304	exit(EXIT_FAILURE);
	305	}
bbefb8dd MD	306	fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
bbefb8dd MD	307	if (!fmt_write) {
c8b219a3	308	fprintf(stdout, "[error] format \"%s\" is not supported.\n\n",
bbefb8dd MD	309	opt_output_format);
	310	exit(EXIT_FAILURE);
	311	}
	312
afb48eae AA	313	/*
	314	* pass the input path to nftw() .
	315	* specify traverse_dir() as the callback function.
	316	* depth = 10 which is the max number of file descriptors
	317	* that nftw() can open at a given time.
	318	* flags = 0 check nftw documentation for more info .
	319	*/
	320	init_trace_collection(&trace_collection_read);
	321	ret = nftw(opt_input_path, traverse_dir, 10, 0);
	322	if (ret != 0) {
c8b219a3	323	fprintf(stdout, "[error] opening trace \"%s\" for reading.\n\n",
bbefb8dd MD	324	opt_input_path);
	325	goto error_td_read;
	326	}
afb48eae AA	327	if (trace_collection_read.array->len == 0) {
	328	fprintf(stdout, "[warning] no metadata file was found."
	329	" no output was generated\n");
	330	return 0;
	331	}
bbefb8dd	332
ae23d232	333	td_write = fmt_write->open_trace(opt_output_path, O_RDWR, NULL, NULL);
bbefb8dd MD	334	if (!td_write) {
bbefb8dd MD	335	fprintf(stdout, "Error opening trace \"%s\" for writing.\n\n",
b61922b5	336	opt_output_path ? : "<none>");
bbefb8dd MD	337	goto error_td_write;
bbefb8dd MD	338	}
847bf71a	339
afb48eae	340	ret = convert_trace(td_write, &trace_collection_read);
46322b33 MD	341	if (ret) {
	342	fprintf(stdout, "Error printing trace.\n\n");
	343	goto error_copy_trace;
	344	}
847bf71a	345
bbefb8dd	346	fmt_write->close_trace(td_write);
afb48eae AA	347	finalize_trace_collection(&trace_collection_read);
	348	printf_verbose("finished converting. Output written to:\n%s\n",
	349	opt_output_path ? : "<stdout>");
bbefb8dd	350	exit(EXIT_SUCCESS);
34ac0e6c	351
bbefb8dd	352	/* Error handling */
46322b33	353	error_copy_trace:
bbefb8dd MD	354	fmt_write->close_trace(td_write);
bbefb8dd MD	355	error_td_write:
afb48eae	356	finalize_trace_collection(&trace_collection_read);
bbefb8dd MD	357	error_td_read:
bbefb8dd MD	358	exit(EXIT_FAILURE);
4c8bfb7e	359	}